Alta, WY Weather Forecast & Current Conditions

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Alta Weather Map
UTC Time: 9/18/2026, 21:56
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
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Alta, WY Regional Weather

Expires:202609182200;;675743
ASUS45 KCYS 182110
RWRWY 

WYOMING REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHEYENNE WY
300 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.


WYZ002>013-054>058-071-098>099-182200-
...NORTHERN WYOMING...
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
JACKSON        CLOUDY    54  47  77 VRB5      30.29F                  
CODY           PTSUNNY   68  44  42 SW17G28   30.17R                  
GREYBULL       MOSUNNY   80  45  28 CALM      30.04F                  
WORLAND        MOSUNNY   78  46  32 NW5       30.05F                  
SHERIDAN       MOSUNNY   84  46  26 NE5       30.05F                  
BUFFALO        MOSUNNY   80  46  30 VRB6      30.08F                  
GILLETTE       SUNNY     79  51  37 VRB5      30.08F                  
HULETT         MOSUNNY   81  54  39 MISG      30.10F                  
NEWCASTLE      SUNNY     81  48  32 NW12      30.07S                  

$$

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

Alta, WY

Afternoon
Thunderstorms
55°/ 38° 13°/
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. Some thunderstorms may be severe. Highs in the mid 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. Some thunderstorms may be severe in the evening. Lows in the upper 30s. Chance of rain 80 percent.

Teton Valley County Including 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.

Caribou Range County, ID

Tonight
Thunderstorms
39°
N/A
Saturday
Thunderstorms
55°/ 35° 13°/
N/A
Sunday
Partly Cloudy
60°/ 35° 16°/
0%
Monday
Sunny
67°/ 39° 19°/
0%
Tue Night
Thunderstorms
40°
N/A
Wednesday
Clear
69°21°
0%
Thursday
Clear
69°/ 41° 21°/
0%

Night: Rain showers likely and a chance of thunderstorms in the evening...then a chance of rain showers and a slight chance of thunderstorms after midnight. Colder. Lows 39 to 47.

Jackson, WY

Afternoon
Thunderstorms
62°/ 40° 17°/
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 lower 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.

Arco/Mud Lake Desert County, ID

Tonight
Thunderstorms
40°
N/A
Saturday
Thunderstorms
58°/ 40° 14°/
50%
Sunday
Sunny
63°/ 40° 17°/
0%
Monday
Sunny
68°/ 42° 20°/
0%
Tue Night
Cloudy
42°
0%
Wednesday
Sunny
71°/ 43° 22°/
0%
Thu Night-Fri
Cloudy
44°
0%

Night: Rain showers likely and a chance of thunderstorms in the evening...then a chance of rain showers and a slight chance of thunderstorms after midnight. Colder. Some thunderstorms may produce heavy rainfall in the evening. Lows 40 to 47. South winds up to 10 mph.

Centennial Mountains County, 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.

Afton, WY

Afternoon
Thunderstorms
65°/ 40° 18°/
80%
Saturday
Thunderstorms
60°/ 35° 16°/
80%
Sunday
Cloudy
62°/ 35° 17°/
0%
Monday
Sunny
70°/ 40° 21°/
0%
Tuesday
Cloudy
72°/ 42° 22°/
20%
Wednesday
Sunny
72°/ 40° 22°/
0%
Thursday
Sunny
75°24°
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.

Blackfoot Mountains County Including Grace, ID

Tonight
Thunderstorms
38°
N/A
Saturday
Thunderstorms
54°/ 36° 12°/
N/A
Sunday
Sunny
60°/ 37° 16°/
0%
Monday
Sunny
66°/ 42° 19°/
0%
Tue Night
Cloudy
42°
0%
Wednesday
Clear
68°20°
0%
Thursday
Clear
68°/ 44° 20°/
0%

Night: Rain showers likely and a chance of thunderstorms in the evening...then a slight chance of showers and thunderstorms after midnight. Colder. Lows 38 to 48.

Pinedale, WY

Afternoon
Thunderstorms
62°/ 40° 17°/
80%
Saturday
Thunderstorms
60°/ 32° 16°/
70%
Sunday
Cloudy
60°/ 35° 16°/
0%
Monday
Sunny
65°/ 38° 18°/
0%
Tuesday
Cloudy
68°/ 40° 20°/
30%
Wednesday
Sunny
68°/ 38° 20°/
0%
Thursday
Sunny
70°21°
0%

Day: Showers with a chance of thunderstorms. Some thunderstorms may be severe. Highs in the lower 60s. South winds around 10 mph with gusts up to 20 mph. Chance of rain 80 percent.

Night: Mostly cloudy. Showers with a chance of thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Patchy fog. Some thunderstorms may be severe in the evening. Lows around 40. South winds around 10 mph in the evening. Chance of rain 80 percent.

Lower Snake River Plain County Including Pocatello, ID

Tonight
Thunderstorms
39°
N/A
Saturday
Thunderstorms
59°/ 39° 15°/
50%
Sunday
Sunny
67°/ 40° 19°/
0%
Monday
Sunny
72°/ 42° 22°/
0%
Tue Night
Cloudy
42°
0%
Wednesday
Sunny
74°/ 43° 23°/
0%
Thu Night-Fri
Cloudy
45°
0%

Night: Mostly cloudy with a chance of showers and thunderstorms in the evening...then partly cloudy with a chance of rain showers and a slight chance of thunderstorms after midnight. Colder. Lows 39 to 49. Southwest winds up to 10 mph.

Lake, WY

Afternoon
Thunderstorms
58°/ 38° 14°/
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 upper 50s. 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.

Dubois, WY

Afternoon
Thunderstorms
65°/ 45° 18°/
60%
Saturday
Thunderstorms
58°/ 40° 14°/
60%
Sunday
Thunderstorms
60°/ 40° 16°/
40%
Monday
Sunny
62°/ 42° 17°/
0%
Tuesday
Cloudy
68°/ 45° 20°/
30%
Wednesday
Cloudy
70°/ 45° 21°/
0%
Thursday
Sunny
70°21°
0%

Day: Showers likely with a chance of thunderstorms. Highs in the mid 60s. Southwest winds around 10 mph. Chance of rain 60 percent.

Night: Mostly cloudy. Showers likely with a chance of thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Patchy fog after midnight. Lows in the mid 40s. West winds around 10 mph in the evening. Chance of rain 60 percent.

Absaroka Mountains County, WY

Afternoon
Thunderstorms
55°/ 40° 13°/
90%
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 mid 50s. Southwest winds around 10 mph. Chance of rain 90 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.

Marsh, ID

Tonight
Thunderstorms
39°
N/A
Saturday
Thunderstorms
56°/ 37° 13°/
N/A
Sunday
Sunny
62°/ 40° 17°/
0%
Monday
Sunny
67°/ 44° 19°/
0%
Tue Night
Cloudy
44°
0%
Wednesday
Clear
70°21°
0%
Thursday
Clear
70°/ 45° 21°/
0%

Night: Rain showers likely and a chance of thunderstorms in the evening...then partly cloudy with a slight chance of showers and thunderstorms after midnight. Colder. Lows 39 to 49.

Bear Lake Valley County Including Saint Charles, ID

Tonight
Thunderstorms
37°
N/A
Saturday
Thunderstorms
57°/ 33° 14°/
N/A
Sunday
Sunny
65°/ 34° 18°/
0%
Monday
Sunny
67°/ 39° 19°/
0%
Tue Night
Thunderstorms
39°
N/A
Wednesday
Clear
69°21°
0%
Thursday
Clear
69°/ 41° 21°/
0%

Night: Rain showers and a chance of thunderstorms in the evening...then a slight chance of showers and thunderstorms after midnight. Colder. Lows 37 to 47.

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.

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.

Salt River, WY

Afternoon
Thunderstorms
58°/ 38° 14°/
80%
Saturday
Thunderstorms
52°/ 35° 11°/
80%
Sunday
Cloudy
55°/ 38° 13°/
0%
Monday
Sunny
62°/ 42° 17°/
0%
Tuesday
Cloudy
62°/ 42° 17°/
30%
Wednesday
Sunny
62°/ 42° 17°/
0%
Thursday
Sunny
65°18°
0%

Day: Showers with a chance of thunderstorms. Some thunderstorms may be severe. Highs in the upper 50s. Southwest winds around 10 mph with gusts up to 25 mph. Chance of rain 80 percent.

Night: Mostly cloudy with rain showers with a chance of thunderstorms in the evening, then partly cloudy with a chance of rain showers with a slight chance of thunderstorms after midnight. Patchy fog after midnight. Some thunderstorms may be severe in the evening. Lows in the upper 30s. Southeast winds around 10 mph with gusts up to 20 mph in the evening. Chance of rain 80 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.

La Barge, WY

Afternoon
Thunderstorms
65°/ 40° 18°/
80%
Saturday
Thunderstorms
60°/ 32° 16°/
30%
Sunday
Cloudy
62°/ 35° 17°/
0%
Monday
Sunny
68°/ 40° 20°/
0%
Tuesday
Cloudy
68°/ 40° 20°/
30%
Wednesday
Cloudy
68°/ 40° 20°/
0%
Thursday
Sunny
72°22°
0%

Day: Showers with a chance of thunderstorms. Some thunderstorms may be severe. Highs in the mid 60s. East winds around 10 mph with gusts up to 20 mph. Chance of rain 80 percent.

Night: Mostly cloudy with showers with a chance of thunderstorms in the evening, then partly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Patchy fog after midnight. Some thunderstorms may be severe in the evening. Lows around 40. North winds around 10 mph with gusts up to 20 mph in the evening. Chance of rain 80 percent.

Names listed above may include county names.

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