Rainbow Lake, MT Weather Forecast & Current Conditions

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Rainbow Lake Weather Map
UTC Time: 9/18/2026, 19:45
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
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Rainbow Lake, MT Regional Weather

Expires:202609182000;;670913
ASUS45 KCYS 181910
RWRWY 

WYOMING REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHEYENNE WY
100 PM MDT FRI SEP 18 2026

NOTE:  "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET
WITH NO SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.


WYZ001-182000-
...YELLOWSTONE NATIONAL PARK...
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
LK YELLOWSTONE   N/A     50  45  83 VRB6      30.36S                  
W YELLOWSTONE  NOT AVBL                                               

$$

SKY/WX - Weather  TMP - Temperature  DP - Dew Point  RH - Humidity
WIND - Wind Direction/Speed PRES - Barometric Pressure VSB - Visibility
WCI - Wind Chill Index E13G22 Wind - East Wind 13 mph/Gusts of 22 mph

Rainbow Lake, MT

Afternoon
Thunderstorms
62°/ 38° 17°/
80%
Saturday
Thunderstorms
50°/ 35° 10°/
80%
Sunday
Thunderstorms
55°/ 35° 13°/
30%
Monday
Cloudy
62°/ 38° 17°/
0%
Tuesday
Cloudy
62°/ 38° 17°/
0%
Wednesday
Sunny
62°/ 38° 17°/
0%
Thursday
Sunny
65°18°
0%

Day: Showers with a chance of thunderstorms. Highs in the lower 60s. Chance of rain 80 percent.

Night: Cloudy. Showers with a chance of thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Patchy fog. Lows in the upper 30s. Chance of rain 80 percent.

Cooke City, MT

Today
Thunderstorms
68°/ 38° 20°/
90%
Saturday
Thunderstorms
58°/ 32° 14°/
70%
Sunday
Thunderstorms
60°/ 32° 16°/
60%
Monday
Sunny
68°/ 35° 20°/
0%
Tuesday
Sunny
68°/ 35° 20°/
0%
Wednesday
Sunny
68°/ 35° 20°/
0%
Thursday
Sunny
72°/ 38° 22°/
0%
Friday
Sunny
72°22°
0%

Day: Showers likely and chance of thunderstorms early in the afternoon, then showers and chance of thunderstorms late in the afternoon. Highs in the upper 60s. South winds 5 to 10 mph. Chance of precipitation 80 percent.

Night: Rain showers and chance of thunderstorms in the evening, then rain showers likely overnight. Patchy fog in the late evening and overnight. Areas of fog after 3 am. Some thunderstorms may produce heavy rainfall early in the evening. Some thunderstorms may produce heavy rainfall late in the evening. Lows in the upper 30s. Northeast winds 5 to 10 mph. Chance of precipitation 90 percent.

Emigrant, MT

Today
Thunderstorms
75°/ 48° 24°/
90%
Saturday
Thunderstorms
60°/ 45° 16°/
90%
Sunday
Thunderstorms
65°/ 45° 18°/
40%
Monday
Sunny
75°/ 48° 24°/
0%
Tuesday
Sunny
78°/ 48° 26°/
0%
Wednesday
Sunny
78°/ 50° 26°/ 10°
0%
Thursday
Sunny
80°/ 50° 27°/ 10°
0%
Friday
Sunny
80°27°
0%

Day: Showers likely and chance of thunderstorms. Highs in the mid 70s. Southwest winds 5 to 10 mph. Chance of precipitation 70 percent.

Night: Rain showers likely and chance of thunderstorms early in the evening, then rain showers and slight chance of thunderstorms in the late evening and overnight. Some thunderstorms may produce heavy rainfall. Lows in the upper 40s. East winds 5 to 10 mph in the evening becoming light overnight. Chance of precipitation 90 percent.

Island Park, ID

Tonight
Thunderstorms
38°
N/A
Saturday
Thunderstorms
54°/ 35° 12°/
N/A
Sunday
Partly Cloudy
59°/ 35° 15°/
0%
Mon-Mon Night
Clear
63°17°
0%
Tue-Tue Night
Cloudy
66°19°
0%
Wednesday
Clear
66°19°
0%
Thursday
Clear
66°/ 40° 19°/
0%

Night: Rain showers likely and a chance of thunderstorms in the evening...then rain showers likely and a slight chance of thunderstorms after midnight. Colder. Lows 38 to 47.

Livingston, MT

Today
Thunderstorms
75°/ 48° 24°/
100%
Saturday
Thunderstorms
58°/ 45° 14°/
90%
Sunday
Thunderstorms
65°/ 42° 18°/
40%
Monday
Sunny
75°/ 45° 24°/
0%
Tuesday
Sunny
78°/ 48° 26°/
0%
Wednesday
Sunny
78°/ 48° 26°/
0%
Thursday
Sunny
80°/ 48° 27°/
0%
Friday
Sunny
80°27°
0%

Day: Chance of showers and slight chance of thunderstorms early in the afternoon, then showers likely and chance of thunderstorms late in the afternoon. Highs in the mid 70s. Northeast winds 5 to 10 mph. Chance of precipitation 60 percent.

Night: Chance of thunderstorms in the evening. Rain showers through the night. Slight chance of thunderstorms overnight. Patchy fog after 3 am. Some thunderstorms may produce heavy rainfall in the evening. Some thunderstorms may produce heavy rainfall overnight. Lows in the upper 40s. East winds 5 to 10 mph. Chance of precipitation 100 percent.

Fishtail, MT

Today
Thunderstorms
75°/ 52° 24°/ 11°
100%
Saturday
Thunderstorms
58°/ 48° 14°/
100%
Sunday
Rain Showers
62°/ 45° 17°/
60%
Monday
Sunny
72°/ 48° 22°/
0%
Tuesday
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
75°/ 52° 24°/ 11°
0%
Thursday
Sunny
78°/ 52° 26°/ 11°
0%
Friday
Sunny
78°26°
0%

Day: Mostly sunny with chance of showers and slight chance of thunderstorms early in the afternoon, then showers likely and chance of thunderstorms late in the afternoon. Highs in the mid 70s. Southeast winds 5 to 10 mph. Chance of precipitation 60 percent.

Night: Rain showers and chance of thunderstorms in the evening, then rain showers and slight chance of thunderstorms overnight. Some thunderstorms may produce heavy rainfall in the evening. Some thunderstorms may produce heavy rainfall overnight. Lows in the lower 50s. West winds 5 to 10 mph. Chance of precipitation 100 percent.

Clyde Park, MT

Today
Thunderstorms
72°/ 45° 22°/
100%
Saturday
Thunderstorms
58°/ 42° 14°/
90%
Sunday
Rain Showers
65°/ 42° 18°/
30%
Monday
Sunny
72°/ 45° 22°/
0%
Tuesday
Sunny
75°/ 45° 24°/
0%
Wednesday
Sunny
75°/ 45° 24°/
0%
Thursday
Sunny
78°/ 45° 26°/
0%
Friday
Sunny
78°26°
0%

Day: Mostly sunny with chance of showers and slight chance of thunderstorms early in the afternoon, then showers likely and chance of thunderstorms late in the afternoon. Highs in the lower 70s. Northeast winds 5 to 10 mph. Chance of precipitation 60 percent.

Night: Rain showers and chance of thunderstorms in the evening, then rain showers and slight chance of thunderstorms overnight. Patchy fog overnight. Some thunderstorms may produce heavy rainfall in the evening. Some thunderstorms may produce heavy rainfall overnight. Lows in the mid 40s. South winds 5 to 10 mph in the evening shifting to the north overnight. Chance of precipitation 100 percent.

Absaroka Mountains, WY

Afternoon
Thunderstorms
58°/ 40° 14°/
80%
Saturday
Thunderstorms
48°/ 35° /
80%
Sunday
Thunderstorms
48°/ 38° /
60%
Monday
Sunny
55°/ 38° 13°/
0%
Tuesday
Cloudy
58°/ 40° 14°/
30%
Wednesday
Thunderstorms
58°/ 40° 14°/
30%
Thursday
Sunny
62°17°
0%

Day: Showers with a chance of thunderstorms. Some thunderstorms may produce heavy rainfall. Highs in the upper 50s. Southwest winds around 10 mph. Chance of rain 80 percent.

Night: Mostly cloudy. Rain showers with a chance of thunderstorms in the evening, then rain showers likely after midnight. Patchy fog after midnight. Some thunderstorms may produce heavy rainfall in the evening. Lows around 40. Southwest winds around 10 mph in the evening. Chance of rain 80 percent.

Red Lodge, MT

Today
Thunderstorms
72°/ 50° 22°/ 10°
90%
Saturday
Thunderstorms
55°/ 45° 13°/
90%
Sunday
Rain Showers
58°/ 45° 14°/
60%
Monday
Sunny
65°/ 48° 18°/
0%
Tuesday
Sunny
70°/ 52° 21°/ 11°
0%
Wednesday
Sunny
72°/ 52° 22°/ 11°
0%
Thursday
Sunny
72°/ 52° 22°/ 11°
0%
Friday
Sunny
75°24°
0%

Day: Mostly sunny with chance of showers and slight chance of thunderstorms early in the afternoon, then showers likely and chance of thunderstorms late in the afternoon. Highs in the lower 70s. Southeast winds 5 to 10 mph. Chance of precipitation 60 percent.

Night: Chance of thunderstorms early in the evening. Rain showers through the night. Slight chance of thunderstorms late in the evening. Some thunderstorms may produce heavy rainfall early in the evening. Some thunderstorms may produce heavy rainfall late in the evening. Lows around 50. Northwest winds 5 to 15 mph. Chance of precipitation 90 percent.

Big Timber, MT

Today
Thunderstorms
75°/ 52° 24°/ 11°
100%
Saturday
Thunderstorms
58°/ 48° 14°/
100%
Sunday
Rain Showers
65°/ 45° 18°/
50%
Monday
Sunny
72°/ 48° 22°/
0%
Tuesday
Sunny
78°/ 52° 26°/ 11°
0%
Wednesday
Sunny
78°/ 52° 26°/ 11°
0%
Thursday
Sunny
78°/ 52° 26°/ 11°
0%
Friday
Sunny
78°26°
0%

Day: Mostly sunny with chance of showers and slight chance of thunderstorms early in the afternoon, then showers likely and chance of thunderstorms late in the afternoon. Highs in the mid 70s. Northeast winds 5 to 10 mph. Chance of precipitation 60 percent.

Night: Chance of thunderstorms in the evening. Rain showers through the night. Slight chance of thunderstorms overnight. Patchy fog after 3 am. Some thunderstorms may produce heavy rainfall in the evening. Some thunderstorms may produce heavy rainfall overnight. Lows in the lower 50s. North winds 5 to 10 mph. Chance of precipitation 100 percent.

Columbus, MT

Today
Thunderstorms
78°/ 52° 26°/ 11°
100%
Saturday
Thunderstorms
58°/ 48° 14°/
100%
Sunday
Rain Showers
65°/ 45° 18°/
60%
Monday
Partly Cloudy
72°/ 45° 22°/
0%
Tuesday
Sunny
78°/ 48° 26°/
0%
Wednesday
Sunny
78°/ 48° 26°/
0%
Thursday
Sunny
78°/ 48° 26°/
0%
Friday
Sunny
80°27°
0%

Day: Sunny with slight chance of showers early in the afternoon, then mostly cloudy with chance of showers and thunderstorms late in the afternoon. Highs in the upper 70s. Northeast winds 5 to 10 mph. Chance of precipitation 50 percent.

Night: Rain showers and chance of thunderstorms in the evening, then rain showers and slight chance of thunderstorms overnight. Some thunderstorms may produce heavy rainfall in the evening. Some thunderstorms may produce heavy rainfall overnight. Lows in the lower 50s. North winds 5 to 10 mph. Chance of precipitation 100 percent.

Ashton, ID

Tonight
Thunderstorms
40°
N/A
Saturday
Thunderstorms
60°/ 36° 16°/
N/A
Sunday
Partly Cloudy
61°/ 36° 16°/
0%
Mon-Mon Night
Clear
67°19°
0%
Tue-Tue Night
Cloudy
73°23°
0%
Wednesday
Clear
69°21°
0%
Thursday
Clear
69°/ 42° 21°/
0%

Night: Rain showers likely and a chance of thunderstorms in the evening...then rain showers likely and a slight chance of thunderstorms after midnight. Lows 40 to 47.

Clark, WY

Afternoon
Thunderstorms
72°/ 52° 22°/ 11°
80%
Saturday
Thunderstorms
58°/ 45° 14°/
80%
Sunday
Thunderstorms
58°/ 45° 14°/
60%
Monday
Sunny
68°/ 50° 20°/ 10°
0%
Tuesday
Cloudy
72°/ 52° 22°/ 11°
20%
Wednesday
Cloudy
75°/ 50° 24°/ 10°
0%
Thursday
Sunny
75°24°
0%

Day: Showers with a chance of thunderstorms. Some thunderstorms may produce heavy rainfall. Highs in the lower 70s. West winds around 10 mph. Chance of rain 80 percent.

Night: Cloudy. Showers with a chance of thunderstorms in the evening, then showers likely after midnight. Some thunderstorms may produce heavy rainfall in the evening. Lows in the lower 50s. Northwest winds around 10 mph. Chance of rain 80 percent.

Teton and Gros Ventre Mountains, WY

Afternoon
Thunderstorms
58°/ 38° 14°/
80%
Saturday
Thunderstorms
48°/ 35° /
80%
Sunday
Thunderstorms
52°/ 35° 11°/
30%
Monday
Sunny
58°/ 38° 14°/
0%
Tuesday
Cloudy
62°/ 40° 17°/
30%
Wednesday
Sunny
62°/ 38° 17°/
0%
Thursday
Sunny
62°17°
0%

Day: Showers with a chance of thunderstorms. Highs in the upper 50s. South winds around 10 mph. Chance of rain 80 percent.

Night: Mostly cloudy. Rain showers with a chance of thunderstorms in the evening, then rain showers likely with a slight chance of thunderstorms after midnight. Patchy fog. Lows in the upper 30s. Chance of rain 80 percent.

Jackson, WY

Afternoon
Thunderstorms
65°/ 40° 18°/
80%
Saturday
Thunderstorms
58°/ 38° 14°/
80%
Sunday
Thunderstorms
60°/ 35° 16°/
30%
Monday
Sunny
68°/ 38° 20°/
0%
Tuesday
Cloudy
70°/ 40° 21°/
30%
Wednesday
Sunny
70°/ 38° 21°/
0%
Thursday
Sunny
72°22°
0%

Day: Showers with a chance of thunderstorms. Some thunderstorms may be severe. Highs in the mid 60s. Chance of rain 80 percent.

Night: Mostly cloudy. Showers with a chance of thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Patchy fog. Some thunderstorms may be severe in the evening. Lows around 40. Chance of rain 80 percent.

Melville, MT

Today
Thunderstorms
72°/ 50° 22°/ 10°
100%
Saturday
Thunderstorms
55°/ 48° 13°/
100%
Sunday
Thunderstorms
62°/ 48° 17°/
50%
Monday
Sunny
68°/ 48° 20°/
0%
Tuesday
Sunny
72°/ 52° 22°/ 11°
0%
Wednesday
Sunny
72°/ 52° 22°/ 11°
0%
Thursday
Sunny
75°/ 52° 24°/ 11°
0%
Friday
Sunny
75°24°
0%

Day: Mostly sunny with chance of showers and slight chance of thunderstorms early in the afternoon, then showers likely and chance of thunderstorms late in the afternoon. Highs in the lower 70s. Northeast winds 5 to 15 mph. Chance of precipitation 70 percent.

Night: Rain showers and chance of thunderstorms in the evening, then rain showers and slight chance of thunderstorms overnight. Some thunderstorms may produce heavy rainfall in the evening. Some thunderstorms may produce heavy rainfall overnight. Lows around 50. North winds 5 to 15 mph. Chance of precipitation 100 percent.

Bridger, MT

Today
Thunderstorms
78°/ 52° 26°/ 11°
90%
Saturday
Thunderstorms
62°/ 48° 17°/
90%
Sunday
Rain Showers
62°/ 48° 17°/
60%
Monday
Sunny
72°/ 50° 22°/ 10°
0%
Tuesday
Sunny
75°/ 52° 24°/ 11°
0%
Wednesday
Sunny
78°/ 52° 26°/ 11°
0%
Thursday
Sunny
78°/ 52° 26°/ 11°
0%
Friday
Sunny
80°27°
0%

Day: Sunny with slight chance of showers early in the afternoon, then showers likely and chance of thunderstorms late in the afternoon. Highs in the upper 70s. Northeast winds 5 to 10 mph. Chance of precipitation 60 percent.

Night: Chance of thunderstorms in the evening. Rain showers through the night. Slight chance of thunderstorms overnight. Some thunderstorms may produce heavy rainfall in the evening. Some thunderstorms may produce heavy rainfall overnight. Lows in the lower 50s. Northwest winds 10 to 20 mph. Chance of precipitation 90 percent.

Joliet, MT

Today
Thunderstorms
78°/ 52° 26°/ 11°
90%
Saturday
Thunderstorms
58°/ 48° 14°/
100%
Sunday
Thunderstorms
62°/ 45° 17°/
70%
Monday
Sunny
72°/ 48° 22°/
0%
Tuesday
Sunny
78°/ 48° 26°/
0%
Wednesday
Sunny
78°/ 50° 26°/ 10°
0%
Thursday
Sunny
78°/ 50° 26°/ 10°
0%
Friday
Sunny
78°26°
0%

Day: Sunny early in the afternoon, then showers likely and chance of thunderstorms late in the afternoon. Highs in the upper 70s. North winds 5 to 10 mph. Chance of precipitation 60 percent.

Night: Rain showers and chance of thunderstorms in the evening, then rain showers and slight chance of thunderstorms overnight. Some thunderstorms may produce heavy rainfall in the evening. Some thunderstorms may produce heavy rainfall overnight. Lows in the lower 50s. North winds 5 to 15 mph. Chance of precipitation 90 percent.

Basin, WY

Afternoon
Thunderstorms
80°/ 52° 27°/ 11°
80%
Saturday
Thunderstorms
65°/ 48° 18°/
80%
Sunday
Thunderstorms
62°/ 45° 17°/
60%
Monday
Cloudy
70°/ 50° 21°/ 10°
0%
Tuesday
Sunny
75°/ 50° 24°/ 10°
0%
Wednesday
Cloudy
78°/ 50° 26°/ 10°
0%
Thursday
Sunny
80°27°
0%

Day: Partly cloudy with showers likely with a chance of thunderstorms. Highs around 80. South winds around 10 mph. Chance of rain 60 percent.

Night: Mostly cloudy. Showers with a chance of thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Lows in the lower 50s. Northwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 80 percent.

Harlowton, MT

Today
Thunderstorms
75°/ 52° 24°/ 11°
100%
Saturday
Thunderstorms
58°/ 48° 14°/
100%
Sunday
Thunderstorms
65°/ 45° 18°/
50%
Monday
Sunny
72°/ 48° 22°/
0%
Tuesday
Sunny
78°/ 48° 26°/
0%
Wednesday
Sunny
78°/ 48° 26°/
0%
Thursday
Sunny
78°/ 48° 26°/
0%
Friday
Sunny
78°26°
0%

Day: Mostly sunny. Slight chance of showers early in the afternoon, then chance of showers and thunderstorms late in the afternoon. Highs in the mid 70s. North winds 5 to 15 mph. Chance of precipitation 50 percent.

Night: Rain showers likely and chance of thunderstorms early in the evening, then rain showers and slight chance of thunderstorms in the late evening and overnight. Some thunderstorms may produce heavy rainfall. Lows in the lower 50s. North winds 5 to 15 mph. Chance of precipitation 100 percent.

Names listed above may include county names.

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