Flat Reservoir, MT Weather Forecast & Current Conditions

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Flat Reservoir Weather Map
UTC Time: 10/18/2026, 07:54
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Aeronautical Observation: Automated synoptic observations via NWS Gateway.
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Flat Reservoir, MT Regional Weather

Expires:202610180800;;296483
ASUS45 KTFX 180710
RWRMT 
Montana Regional Weather Roundup
National Weather Service Great Falls MT
100 AM MDT SUN OCT 18 2026

NOTE: "FAIR" indicates few or no clouds below 12,000 feet with no
significant weather and/or obstructions to visibility.


MTZ028>42-056>058-180800-
Southcentral and southeast Montana
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
Baker          PTCLDY    38  30  73 CALM      29.97R                  
Big Timber     SUNNY     55  23  28 W15       30.08S                  
Billings       PTCLDY    51  29  42 NW6       30.03R                  
Forsyth        MOSUNNY   48  36  62 W7        29.96S                  
Hardin         SUNNY     39  36  87 SE5       30.00R WCI  36          
Harlowton      FAIR      50  29  44 NW9       30.05R                  
Laurel         SUNNY     52  27  37 SW7       30.04R                  
Livingston     PTCLDY    57  24  28 W16G23    30.08R                  
Miles City     CLEAR     46  34  62 W10       29.95R                  
$$

Regional Reports...Dakotas/MN
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
Williston      PTCLDY    55  33  43 NW14      29.89R                  
Minot          PTCLDY    59  35  40 SW17G25   29.79R                  
Dickinson      PTCLDY    54  31  41 W12       29.89R                  
Beach            N/A     50  30  46 W10       29.95R                  
Bowman         FAIR      54  27  35 NW13      29.95R                  
Crosby         FAIR      54  34  47 NW13      29.84R                  
Glen Ullin     FAIR      39  25  56 CALM      29.87R                  
Hettinger      PTCLDY    41  27  57 N3        29.94R                  
Tioga          FAIR      50  32  50 W10       29.87R                  
Watford City   CLOUDY    50  37  62 SW10      29.90R                  
Bismarck       PTCLDY    42  34  73 CALM      29.87R                  
Grand Forks    PTCLDY    48  38  68 S13       29.79S                  
Fargo          MOCLDY    47  35  63 S9        29.88R                  
Buffalo SD       N/A     49  27  42 W7        29.95S                  
Rapid City     CLEAR     47  29  49 NW8       29.95R                  
Intl Falls     MOCLDY    52  36  54 S10G22    29.82F                  
Duluth         PTCLDY    47  31  53 SW18      30.01S                  
Minneapolis    CLEAR     51  31  46 S13       30.14F                  
$$

Regional Reports...WY/CO/ID/WA/OR
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
Buffalo WY     CLEAR     49  21  33 W8        30.07R                  
Cody           PTCLDY    59  20  22 NW12      30.14R                  
Gillette       CLEAR     54  26  34 W12       30.04R                  
Powell         FAIR      54  16  22 W10       30.07F                  
Sheridan       PTCLDY    42  26  53 CALM      30.04R                  
Yellowstone La   N/A     27  24  89 NW3       30.32F                  
Boise          CLEAR     52  28  39 S5        30.05S                  
Couer d'Alene  PTCLDY    50  36  58 SE9       30.12S                  
Idaho Falls    CLEAR     36  31  82 N6        30.19F WCI  31          
Salmon         PTCLDY    37  31  78 CALM      30.14S                  
Spokane        MOCLDY    47  29  49 S7        30.11S                  
Seattle        CLEAR     50  43  77 NE5       30.25S                  
Portland       PTCLDY    53  46  77 NW8       30.19S                  
$$

Other Reports
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
Atlanta        CLEAR     51  39  63 E12       30.37R                  
Anchorage      CLOUDY    41  25  52 N8        29.76R                  
Boston         CLEAR     37  24  59 W6        30.48R WCI  32          
Chicago        CLEAR     45  35  68 S6        30.41S                  
Fairbanks      CLOUDY    30  27  86 SW5       29.83R WCI  25          
Great Falls    MOCLDY    46  32  58 NE9       30.06R                  
Houston        MOCLDY    56  45  66 NW3       30.35F                  
Las Vegas NV   MOCLDY    68  37  32 CALM      30.14S                  
Phoenix AZ     MOCLDY    72  40  31 NE13      30.05F                  
Salt Lake City PTCLDY    50  39  66 SE3       30.18S                  
San Diego      PTCLDY    71  46  40 N3        29.99F                  
San Francisco  CLEAR     61  56  83 NW12      29.97F                  
Washington Dul CLEAR     41  34  76 N5        30.49R                  
$$

Regional Reports...Alberta
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
Calgary        CLEAR     50  18  27 W15G23    29.99R                  
Fort McMurray  PTCLDY    43  36  75 W21G30    29.62R                  
High Level     CLEAR     41  21  45 SW8       29.67R                  
Lethbridge     PTCLDY    50  25  37 W14G22    30.02R                  
Medicine Hat   CLEAR     39  30  70 SW8       30.00R WCI  34          
Pincher Creek  CLEAR     46  25  42 SW16G23   30.03R                  
$$

Regional Reports...Saskatchewan
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
Estevan        CLEAR     54  34  47 NW20G32   29.83R                  
Prince Albert  CLEAR     50  34  53 W20G30    29.60R                  
Regina         PTCLDY    48  30  49 W20G28    29.84R                  
Saskatoon      CLEAR     46  30  53 W15       29.76R                  
Swift Current  CLEAR     41  27  56 SW14      29.93R                  
$$
  

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

Flat Reservoir, MT

Tonight
Cloudy
42°6°
0%
Sunday
Sunny
65°/ 42° 18°/ 6°
0%
Monday
Sunny
62°/ 40° 17°/ 4°
0%
Tuesday
Sunny
72°/ 42° 22°/ 6°
0%
Wednesday
Sunny
68°/ 45° 20°/ 7°
0%
Thursday
Sunny
75°/ 52° 24°/ 11°
0%
Friday
Rain Showers
72°/ 45° 22°/ 7°
60%
Saturday
Rain Showers
55°13°
40%

Night: Partly cloudy. Lows in the lower 40s. West winds 5 to 10 mph.

Buffalo, SD

Overnight
Clear
45°7°
0%
Sunday
Sunny
65°/ 38° 18°/ 3°
0%
Monday
Sunny
62°/ 38° 17°/ 3°
0%
Tuesday
Sunny
72°/ 42° 22°/ 6°
0%
Wednesday
Sunny
65°/ 45° 18°/ 7°
0%
Thursday
Sunny
75°/ 52° 24°/ 11°
0%
Friday
Rain
72°/ 48° 22°/ 9°
50%
Saturday
Rain
58°14°
40%

Night: Mostly clear. Lows in the mid 40s. Northwest winds 5 to 10 mph.

Baker, MT

Tonight
Cloudy
42°6°
0%
Sunday
Sunny
65°/ 38° 18°/ 3°
0%
Monday
Sunny
65°/ 38° 18°/ 3°
0%
Tuesday
Sunny
72°/ 38° 22°/ 3°
0%
Wednesday
Sunny
68°/ 42° 20°/ 6°
0%
Thursday
Sunny
75°/ 48° 24°/ 9°
0%
Friday
Rain Showers
72°/ 42° 22°/ 6°
50%
Saturday
Rain Showers
55°13°
40%

Night: Partly cloudy. Warmer. Lows in the lower 40s. West winds 5 to 15 mph.

Broadus, MT

Tonight
Cloudy
45°7°
0%
Sunday
Sunny
65°/ 42° 18°/ 6°
0%
Monday
Sunny
68°/ 45° 20°/ 7°
0%
Tuesday
Sunny
72°/ 42° 22°/ 6°
0%
Wednesday
Sunny
68°/ 48° 20°/ 9°
0%
Thursday
Sunny
75°/ 52° 24°/ 11°
0%
Friday
Rain Showers
70°/ 45° 21°/ 7°
60%
Saturday
Rain Showers
55°13°
40%

Night: Partly cloudy. Lows in the mid 40s. Northwest winds 5 to 15 mph.

Miles City, MT

Tonight
Clear
42°6°
0%
Sunday
Sunny
65°/ 42° 18°/ 6°
0%
Monday
Sunny
70°/ 42° 21°/ 6°
0%
Tuesday
Sunny
68°/ 40° 20°/ 4°
0%
Wednesday
Sunny
65°/ 45° 18°/ 7°
0%
Thursday
Sunny
72°/ 48° 22°/ 9°
0%
Friday
Rain Showers
68°/ 45° 20°/ 7°
50%
Saturday
Rain Showers
55°13°
30%

Night: Mostly clear. Lows in the lower 40s. West winds 5 to 15 mph.

Belle Fourche, SD

Overnight
Clear
45°7°
0%
Sunday
Sunny
65°/ 38° 18°/ 3°
0%
Monday
Sunny
62°/ 40° 17°/ 4°
0%
Tuesday
Sunny
72°/ 45° 22°/ 7°
0%
Wednesday
Sunny
65°/ 48° 18°/ 9°
0%
Thursday
Sunny
75°/ 52° 24°/ 11°
20%
Friday
Rain
75°/ 48° 24°/ 9°
60%
Saturday
Rain
58°14°
50%

Night: Mostly clear. Lows in the mid 40s. Northwest winds 5 to 10 mph.

Lemmon, SD

Overnight
Cloudy
45°7°
0%
Sunday
Sunny
65°/ 35° 18°/ 2°
0%
Monday
Sunny
62°/ 38° 17°/ 3°
0%
Tuesday
Sunny
70°/ 42° 21°/ 6°
0%
Wednesday
Sunny
65°/ 45° 18°/ 7°
0%
Thursday
Sunny
72°/ 52° 22°/ 11°
20%
Friday
Rain
72°/ 48° 22°/ 9°
50%
Saturday
Rain
58°14°
50%

Night: Partly cloudy. Lows in the mid 40s. Northwest winds 5 to 10 mph.

Usta, SD

Overnight
Cloudy
45°7°
0%
Sunday
Sunny
65°/ 38° 18°/ 3°
0%
Monday
Sunny
62°/ 38° 17°/ 3°
0%
Tuesday
Sunny
72°/ 42° 22°/ 6°
0%
Wednesday
Sunny
65°/ 45° 18°/ 7°
0%
Thursday
Sunny
75°/ 52° 24°/ 11°
20%
Friday
Rain
75°/ 48° 24°/ 9°
50%
Saturday
Rain
58°14°
40%

Night: Partly cloudy. Lows in the mid 40s. Northwest winds 5 to 10 mph.

Terry, MT

Tonight
Cloudy
42°6°
0%
Sunday
Sunny
65°/ 40° 18°/ 4°
0%
Monday
Sunny
70°/ 40° 21°/ 4°
0%
Tue-Tue Night
Clear
70°21°
0%
Wed-Wed Night
Clear
65°18°
0%
Thursday
Sunny
75°/ 48° 24°/ 9°
0%
Friday
Rain
70°/ 42° 21°/ 6°
N/A
Saturday
Rain
55°13°
N/A

Night: Partly cloudy this evening, then clearing. Lows in the lower 40s. West wind 5 to 10 mph.

Sundance, WY

Overnight
Clear
45°7°
0%
Sunday
Sunny
62°/ 38° 17°/ 3°
0%
Monday
Sunny
62°/ 45° 17°/ 7°
0%
Tuesday
Sunny
68°/ 45° 20°/ 7°
0%
Wednesday
Sunny
65°/ 50° 18°/ 10°
0%
Thursday
Cloudy
72°/ 52° 22°/ 11°
20%
Friday
Rain
68°/ 45° 20°/ 7°
60%
Saturday
Rain
52°11°
50%

Night: Mostly clear. Lows in the mid 40s. East winds 5 to 10 mph.

Moorcroft, WY

Overnight
Clear
40°4°
0%
Sunday
Sunny
65°/ 35° 18°/ 2°
0%
Monday
Sunny
65°/ 42° 18°/ 6°
0%
Tuesday
Sunny
72°/ 38° 22°/ 3°
0%
Wednesday
Sunny
68°/ 45° 20°/ 7°
0%
Thursday
Cloudy
75°/ 50° 24°/ 10°
20%
Friday
Rain
72°/ 42° 22°/ 6°
60%
Saturday
Rain
55°13°
40%

Night: Mostly clear. Lows around 40. Southwest winds around 5 mph.

Colony, WY

Overnight
Clear
45°7°
0%
Sunday
Sunny
65°/ 38° 18°/ 3°
0%
Monday
Sunny
65°/ 40° 18°/ 4°
0%
Tuesday
Sunny
72°/ 42° 22°/ 6°
0%
Wednesday
Sunny
65°/ 48° 18°/ 9°
0%
Thursday
Sunny
78°/ 52° 26°/ 11°
20%
Friday
Rain
72°/ 45° 22°/ 7°
60%
Saturday
Rain
55°13°
50%

Night: Mostly clear. Lows in the mid 40s. West winds 5 to 10 mph.

Wibaux, MT

Tonight
Cloudy
42°6°
0%
Sunday
Sunny
62°/ 42° 17°/ 6°
0%
Monday
Sunny
65°/ 42° 18°/ 6°
0%
Tue-Tue Night
Clear
68°20°
0%
Wed-Wed Night
Clear
65°18°
0%
Thursday
Sunny
75°/ 50° 24°/ 10°
0%
Friday
Rain
72°/ 45° 22°/ 7°
N/A
Saturday
Rain
55°13°
N/A

Night: Partly cloudy this evening, then clearing. Lows in the lower 40s. Southwest wind around 10 mph, becoming west after midnight.

Faith, SD

Overnight
Cloudy
45°7°
0%
Sunday
Sunny
68°/ 38° 20°/ 3°
0%
Monday
Sunny
60°/ 38° 16°/ 3°
0%
Tuesday
Sunny
72°/ 45° 22°/ 7°
0%
Wednesday
Sunny
68°/ 45° 20°/ 7°
0%
Thursday
Sunny
75°/ 52° 24°/ 11°
20%
Friday
Rain
75°/ 48° 24°/ 9°
50%
Saturday
Rain
58°14°
40%

Night: Partly cloudy. Lows in the mid 40s. Northwest winds 5 to 10 mph.

Spearfish, SD

Overnight
Clear
48°9°
0%
Sunday
Sunny
62°/ 42° 17°/ 6°
0%
Monday
Sunny
62°/ 45° 17°/ 7°
0%
Tuesday
Sunny
72°/ 48° 22°/ 9°
0%
Wednesday
Sunny
65°/ 52° 18°/ 11°
0%
Thursday
Cloudy
78°/ 55° 26°/ 13°
20%
Friday
Rain
72°/ 48° 22°/ 9°
60%
Saturday
Rain
55°13°
50%

Night: Mostly clear. Lows in the upper 40s. West winds 5 to 10 mph.

Glendive, MT

Tonight
Mostly Cloudy
42°6°
0%
Sunday
Sunny
62°/ 40° 17°/ 4°
0%
Monday
Sunny
68°/ 42° 20°/ 6°
0%
Tuesday
Sunny
68°/ 40° 20°/ 4°
0%
Wed-Wed Night
Clear
65°18°
0%
Thursday
Sunny
75°/ 48° 24°/ 9°
0%
Friday
Rain
70°/ 45° 21°/ 7°
N/A
Saturday
Rain
55°13°
N/A

Night: Mostly cloudy this evening, then clearing. Lows in the lower 40s. Southwest wind 5 to 10 mph, becoming northwest after midnight.

Gillette, WY

Overnight
Clear
42°6°
0%
Sunday
Sunny
65°/ 42° 18°/ 6°
0%
Monday
Sunny
68°/ 42° 20°/ 6°
0%
Tuesday
Sunny
72°/ 42° 22°/ 6°
0%
Wednesday
Sunny
68°/ 48° 20°/ 9°
0%
Thursday
Sunny
75°/ 52° 24°/ 11°
0%
Friday
Rain
70°/ 45° 21°/ 7°
70%
Saturday
Rain
55°13°
40%

Night: Mostly clear. Lows in the lower 40s. West winds around 5 mph.

Sturgis, SD

Overnight
Clear
52°11°
0%
Sunday
Sunny
65°/ 42° 18°/ 6°
0%
Monday
Sunny
62°/ 45° 17°/ 7°
0%
Tuesday
Sunny
72°/ 50° 22°/ 10°
0%
Wednesday
Sunny
68°/ 52° 20°/ 11°
0%
Thursday
Sunny
78°/ 55° 26°/ 13°
20%
Friday
Rain
75°/ 52° 24°/ 11°
50%
Saturday
Rain
58°14°
40%

Night: Mostly clear. Near steady temperature in the lower 50s. West winds 5 to 10 mph with gusts up to 20 mph.

Lead, SD

Overnight
Clear
45°7°
0%
Sunday
Sunny
58°/ 35° 14°/ 2°
0%
Monday
Sunny
60°/ 42° 16°/ 6°
0%
Tuesday
Sunny
68°/ 42° 20°/ 6°
0%
Wednesday
Sunny
65°/ 45° 18°/ 7°
0%
Thursday
Cloudy
70°/ 48° 21°/ 9°
20%
Friday
Rain
65°/ 42° 18°/ 6°
60%
Saturday
Rain
52°11°
50%

Night: Mostly clear. Lows in the mid 40s. Northwest winds around 5 mph.

Colstrip, MT

Tonight
Clear
42°6°
0%
Sunday
Sunny
65°/ 42° 18°/ 6°
0%
Monday
Sunny
70°/ 38° 21°/ 3°
0%
Tuesday
Sunny
68°/ 40° 20°/ 4°
0%
Wednesday
Sunny
68°/ 42° 20°/ 6°
0%
Thursday
Sunny
72°/ 48° 22°/ 9°
20%
Friday
Rain Showers
68°/ 42° 20°/ 6°
60%
Saturday
Rain Showers
55°13°
20%

Night: Mostly clear. Lows in the lower 40s. West winds 5 to 15 mph.

Names listed above may include county names.

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