Arnold, MT Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Arnold, MT in one place.
Mostly sunny, with a high near 54. South southwest wind 1 to 6 mph.
Local Weather Overview
This forecast page for Arnold, 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: Nov 5, 2026 4:40 PM MST.
The active forecast window currently covers Nov 7 to Nov 11, 2026 for Arnold, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Nov 7 to Nov 11, 2026
- Latest sync
- Nov 5, 2026 4:40 PM MST
- Forecast office
- TFX
- Source
- NOAA / NWS
Daily Outlook
This Week in Arnold
Sunday looks like the warmest upcoming period in Arnold at 59 degrees F.
Sunday Night is the coolest period ahead with temperatures near 32 degrees F.
The strongest winds are forecast for Sunday at about 7 to 12 mph SSW.
The forecast from Nov 7 through Nov 11 stays mostly dry.
Forecast Details
- Last updated
- Nov 5, 2026 4:40 PM MST
- Coverage
- 6 days
- Time zone
- America/Denver
- Forecast office
- TFX
- Radar station
- KTFX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 34. South wind 2 to 10 mph, with gusts as high as 18 mph.
Mostly sunny, with a high near 59. South southwest wind 7 to 12 mph, with gusts as high as 23 mph.
Mostly cloudy, with a low around 32. South southwest wind 0 to 9 mph.
Partly sunny, with a high near 51.
Mostly cloudy, with a low around 34.
Mostly sunny, with a high near 56.
Partly cloudy, with a low around 35.
Mostly sunny, with a high near 57.
Partly cloudy, with a low around 36.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Nov 7
|
Mostly Sunny
|
54°F |
1 to 6 mph
SSW
|
|
Saturday Night
Nov 7
|
Mostly Clear
|
34°F |
2 to 10 mph
S
|
|
Sunday
Nov 8
|
Mostly Sunny
|
59°F |
7 to 12 mph
SSW
|
|
Sunday Night
Nov 8
|
Mostly Cloudy
|
32°F |
0 to 9 mph
SSW
|
|
Monday
Nov 9
|
Partly Sunny
|
51°F |
1 mph
S
|
|
Monday Night
Nov 9
|
Mostly Cloudy
|
34°F |
0 to 7 mph
S
|
|
Tuesday
Nov 10
|
Mostly Sunny
|
56°F |
1 to 7 mph
SW
|
|
Tuesday Night
Nov 10
|
Partly Cloudy
|
35°F |
3 to 9 mph
S
|
|
Veterans Day
Nov 11
|
Mostly Sunny
|
57°F |
1 to 6 mph
S
|
|
Wednesday Night
Nov 11
|
Partly Cloudy
|
36°F |
2 to 8 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Arnold.