Sidney, MT Weather Forecast
Local 7-day forecast
Partly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sidney, MT in one place.
Partly sunny, with a high near 52. West wind 2 to 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: Oct 13, 2026 12:38 PM MDT.
The active forecast window currently covers Oct 13 to Oct 19, 2026 for Sidney, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 13 to Oct 19, 2026
- Latest sync
- Oct 13, 2026 12:38 PM MDT
- Forecast office
- GGW
- Source
- NOAA / NWS
Daily Outlook
This Week in Sidney
Saturday looks like the warmest upcoming period in Sidney at 75 degrees F.
Tonight is the coolest period ahead with temperatures near 24 degrees F.
The strongest winds are forecast for Thursday at about 9 to 21 mph NW.
The forecast from Oct 13 through Oct 19 stays mostly dry.
Forecast Details
- Last updated
- Oct 13, 2026 12:38 PM MDT
- Coverage
- 8 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
Mostly clear. Low around 24, with temperatures rising to around 28 overnight. West wind around 3 mph.
Mostly sunny, with a high near 58. South southwest wind 1 to 5 mph.
Partly cloudy, with a low around 32. Southwest wind 2 to 6 mph.
Sunny, with a high near 57. Northwest wind 9 to 21 mph, with gusts as high as 33 mph.
Mostly clear, with a low around 25. West northwest wind 2 to 12 mph, with gusts as high as 23 mph.
Sunny, with a high near 65. South wind 5 to 16 mph, with gusts as high as 28 mph.
Clear, with a low around 34. South southwest wind 7 to 12 mph, with gusts as high as 21 mph.
Sunny, with a high near 75. Southwest wind 7 to 13 mph, with gusts as high as 23 mph.
Mostly clear, with a low around 41. West southwest wind around 8 mph.
Mostly sunny, with a high near 68. Northwest wind around 7 mph.
Mostly clear, with a low around 35.
Sunny, with a high near 73.
Partly cloudy, with a low around 40.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Oct 13
|
Partly Sunny
|
52°F |
2 to 7 mph
W
|
|
Tonight
Oct 13
|
Mostly Clear
|
24°F |
3 mph
W
|
|
Wednesday
Oct 14
|
Mostly Sunny
|
58°F |
1 to 5 mph
SSW
|
|
Wednesday Night
Oct 14
|
Partly Cloudy
|
32°F |
2 to 6 mph
SW
|
|
Thursday
Oct 15
|
Sunny
|
57°F |
9 to 21 mph
NW
|
|
Thursday Night
Oct 15
|
Mostly Clear
|
25°F |
2 to 12 mph
WNW
|
|
Friday
Oct 16
|
Sunny
|
65°F |
5 to 16 mph
S
|
|
Friday Night
Oct 16
|
Clear
|
34°F |
7 to 12 mph
SSW
|
|
Saturday
Oct 17
|
Sunny
|
75°F |
7 to 13 mph
SW
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
41°F |
8 mph
WSW
|
|
Sunday
Oct 18
|
Mostly Sunny
|
68°F |
7 mph
NW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
35°F |
3 mph
SE
|
|
Monday
Oct 19
|
Sunny
|
73°F |
5 to 12 mph
SSE
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
40°F |
5 to 9 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sidney.
Nearby forecast pages are not available for this location yet.
