Sidney, MT Weather Forecast
Local 7-day forecast
Mostly Clear
Track current conditions, temperature changes, wind, and the full daily outlook for Sidney, MT in one place.
Mostly clear. Low around 39, with temperatures rising to around 43 overnight. Southwest wind around 7 mph.
Local Weather Overview
This forecast page for Sidney, MT is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 15, 2026 4:26 AM MDT.
The active forecast window currently covers Apr 15 to Apr 21, 2026 for Sidney, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 15 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 4:26 AM MDT
- Forecast office
- GGW
- Source
- NOAA / NWS
Daily Outlook
This Week in Sidney
Monday looks like the warmest upcoming period in Sidney at 74 degrees F.
Friday Night is the coolest period ahead with temperatures near 18 degrees F.
The strongest winds are forecast for Thursday at about 10 to 22 mph NW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 4:26 AM MDT
- Coverage
- 7 days
- Time zone
- America/Denver
- Forecast office
- GGW
- Radar station
- KGGW
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly sunny, with a high near 67. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.
A chance of rain before 2am. Mostly cloudy, with a low around 39. Northeast wind around 8 mph. Chance of precipitation is 30%.
A chance of rain. Partly sunny, with a high near 50. Northwest wind 10 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.
A chance of snow. Mostly cloudy, with a low around 21. North northwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New snow accumulation of less than half an inch possible.
Partly sunny, with a high near 37. Northwest wind 12 to 17 mph, with gusts as high as 26 mph.
Partly cloudy, with a low around 18. Northwest wind 5 to 14 mph, with gusts as high as 23 mph.
Sunny, with a high near 49. Northwest wind 6 to 13 mph, with gusts as high as 21 mph.
Partly cloudy, with a low around 24. West southwest wind 5 to 13 mph, with gusts as high as 21 mph.
Sunny, with a high near 64. South wind 5 to 10 mph.
Partly cloudy, with a low around 37. South wind around 9 mph.
Mostly sunny, with a high near 74.
Partly cloudy, with a low around 39.
Mostly sunny, with a high near 70.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Apr 15
|
Mostly Clear
|
39°F |
7 mph
SW
|
|
Wednesday
Apr 15
|
Partly Sunny
|
67°F |
6 to 10 mph
WSW
|
|
Wednesday Night
Apr 15
|
Chance Light Rain
|
39°F |
8 mph
NE
|
|
Thursday
Apr 16
|
Chance Light Rain
|
50°F |
10 to 22 mph
NW
|
|
Thursday Night
Apr 16
|
Chance Light Snow
|
21°F |
10 to 20 mph
NNW
|
|
Friday
Apr 17
|
Partly Sunny
|
37°F |
12 to 17 mph
NW
|
|
Friday Night
Apr 17
|
Partly Cloudy
|
18°F |
5 to 14 mph
NW
|
|
Saturday
Apr 18
|
Sunny
|
49°F |
6 to 13 mph
NW
|
|
Saturday Night
Apr 18
|
Partly Cloudy
|
24°F |
5 to 13 mph
WSW
|
|
Sunday
Apr 19
|
Sunny
|
64°F |
5 to 10 mph
S
|
|
Sunday Night
Apr 19
|
Partly Cloudy
|
37°F |
9 mph
S
|
|
Monday
Apr 20
|
Mostly Sunny
|
74°F |
8 to 13 mph
WSW
|
|
Monday Night
Apr 20
|
Partly Cloudy
|
39°F |
7 to 12 mph
NNW
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
70°F |
7 to 14 mph
NNE
|
Nearby Forecasts
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Nearby forecast pages are not available for this location yet.
