Hamilton, Montana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for Hamilton MT
National Weather Service Forecast for:
Hamilton MT
Issued by: National Weather Service Missoula, MT |
Updated: 2:30 pm MDT Jun 26, 2025 |
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This Afternoon
 Chance T-storms
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Tonight
 Slight Chance T-storms then Slight Chance Rain
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Friday
 Slight Chance Rain then Slight Chance T-storms
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Friday Night
 Partly Cloudy
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Saturday
 Sunny
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Saturday Night
 Mostly Clear
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Sunday
 Sunny
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Sunday Night
 Clear
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Monday
 Sunny
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Hi 80 °F |
Lo 52 °F |
Hi 79 °F |
Lo 49 °F |
Hi 78 °F |
Lo 48 °F |
Hi 83 °F |
Lo 51 °F |
Hi 91 °F |
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This Afternoon
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A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 80. West wind around 7 mph. |
Tonight
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A slight chance of showers and thunderstorms before 9pm, then a slight chance of rain after 9pm. Mostly cloudy, with a low around 52. West wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 20%. |
Friday
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A slight chance of rain before noon, then a slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79. Light and variable wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 20%. |
Friday Night
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Partly cloudy, with a low around 49. West wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 24 mph. |
Saturday
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Sunny, with a high near 78. Light and variable wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph. |
Saturday Night
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Mostly clear, with a low around 48. |
Sunday
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Sunny, with a high near 83. |
Sunday Night
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Clear, with a low around 51. |
Monday
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Sunny, with a high near 91. |
Monday Night
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Mostly clear, with a low around 56. |
Tuesday
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Mostly sunny, with a high near 91. |
Tuesday Night
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A slight chance of showers and thunderstorms. Partly cloudy, with a low around 57. |
Wednesday
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A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87. |
Wednesday Night
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Partly cloudy, with a low around 56. |
Thursday
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A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85. |
Forecast from NOAA-NWS
for Hamilton MT.
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Weather Forecast Discussion
170
FXUS65 KMSO 261812
AFDMSO
Area Forecast Discussion
National Weather Service Missoula MT
1212 PM MDT Thu Jun 26 2025
.DISCUSSION...
KEY MESSAGES:
- Scattered showers/isolated thunderstorms today, gusty outflow
wind potential.
- Isolated/scattered thunderstorm pattern Thursday through
Saturday.
- Warm up expected to start next week, temperatures 10 to 15
degrees above normal.
- Chances for showers and thunderstorms increases after 2 July.
Showers and thunderstorms are possible today as a weak wave
transits the Northern Rockies today. Missoula and northward clouds
may inhibit convection slightly with results similar to yesterday
virga, sprinkles, and brief showers with large rain drops.
Elsewhere, any showers or thunderstorms will be capable of gusty
outflow winds and brief but heavy showers.
Friday similar conditions will have a similar result, albeit in
much smaller area, likely southern Bitterroot, Anaconda Range,
Lemhi County ID, and southwest MT.
High pressure builds over the region Sunday and Monday onward
expect temperatures 10 to 15 degrees above normal.
The models have been very consistent trying to pinch off energy,
from the overall flow, over northern California on the 2nd. If
this scenario happens southwesterly flow will advect or move a
unstable air mass into the Northern Rockies. While details are
limited, typical scenarios like this produce cloud storms/ virga
on day one, with increasing chances and expanding coverage of
thunderstorms each subsequent afternoon.
&&
.AVIATION... A moist air mass over the region with southwest flow
aloft means we`ll have another round of afternoon showers and
thunderstorms. Terminal KBTM is the most likely to be effected by
afternoon and evening thunderstorms. Terminals KMSO, KHRF, and
KSMN are in the area where we expect convection to initiate, so
storms are not expected to be mature in those areas but the
convection will be noticeable. Convection in the region should die
down by 27/02Z or 27/03Z.
&&
.MSO WATCHES/WARNINGS/ADVISORIES...
MT...None.
ID...None.
&&
$$
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