Sidney, MT Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Sidney, MT in one place.
Sunny, with a high near 96. Heat index values as high as 101. East wind around 21 mph, with gusts as high as 32 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: Jul 14, 2026 5:50 PM MDT.
The active forecast window currently covers Jul 14 to Jul 20, 2026 for Sidney, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 14 to Jul 20, 2026
- Latest sync
- Jul 14, 2026 5:50 PM MDT
- Forecast office
- GGW
- Source
- NOAA / NWS
Daily Outlook
This Week in Sidney
Wednesday looks like the warmest upcoming period in Sidney at 98 degrees F.
Monday Night is the coolest period ahead with temperatures near 59 degrees F.
The strongest winds are forecast for Tonight at about 15 to 23 mph NE.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 5:50 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
Partly cloudy, with a low around 68. Northeast wind 15 to 23 mph, with gusts as high as 35 mph.
Mostly sunny, with a high near 98. East northeast wind around 18 mph, with gusts as high as 29 mph.
Mostly cloudy, with a low around 67. Northeast wind 8 to 18 mph, with gusts as high as 28 mph.
Mostly sunny, with a high near 93. North northwest wind 8 to 12 mph, with gusts as high as 21 mph.
Mostly clear, with a low around 62. North northeast wind 3 to 12 mph, with gusts as high as 20 mph.
Sunny, with a high near 92. North northeast wind 3 to 10 mph, with gusts as high as 18 mph.
Partly cloudy, with a low around 65. East wind 6 to 10 mph.
A slight chance of rain showers before noon, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 95. Southeast wind 6 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. South southeast wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Mostly sunny, with a high near 94. West northwest wind 6 to 18 mph, with gusts as high as 30 mph.
Mostly clear, with a low around 62.
Mostly sunny, with a high near 87.
Partly cloudy, with a low around 59.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Jul 14
|
Sunny
|
96°F |
21 mph
E
|
|
Tonight
Jul 14
|
Partly Cloudy
|
68°F |
15 to 23 mph
NE
|
|
Wednesday
Jul 15
|
Mostly Sunny
|
98°F |
18 mph
ENE
|
|
Wednesday Night
Jul 15
|
Mostly Cloudy
|
67°F |
8 to 18 mph
NE
|
|
Thursday
Jul 16
|
Mostly Sunny
|
93°F |
8 to 12 mph
NNW
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
62°F |
3 to 12 mph
NNE
|
|
Friday
Jul 17
|
Sunny
|
92°F |
3 to 10 mph
NNE
|
|
Friday Night
Jul 17
|
Partly Cloudy
|
65°F |
6 to 10 mph
E
|
|
Saturday
Jul 18
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
95°F |
6 to 13 mph
SE
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
67°F |
7 to 13 mph
SSE
|
|
Sunday
Jul 19
|
Mostly Sunny
|
94°F |
6 to 18 mph
WNW
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
62°F |
6 to 17 mph
NNW
|
|
Monday
Jul 20
|
Mostly Sunny
|
87°F |
6 to 15 mph
NW
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
59°F |
5 to 15 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sidney.
Nearby forecast pages are not available for this location yet.
