Hamilton, MT Weather & Climate Normals
What a normal year in Hamilton actually looks like
On the 30-year record NOAA keeps for Hamilton, MT, the comfort score comes out to 45/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 4 months a year land in the 55–75°F range this site treats as mild.
How much Hamilton's weather actually swings
Average temperatures in Hamilton run from 26°F in Dec up to 67°F in Jul, a 41.2°F seasonal swing, a middling gap by national standards.
Hamilton, month by month
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| Jan | 35°F | 19°F | 0.96in |
| Feb | 39°F | 20°F | 1.18in |
| Mar | 49°F | 25°F | 0.98in |
| Apr | 56°F | 31°F | 1.12in |
| May | 66°F | 38°F | 1.53in |
| Jun | 73°F | 45°F | 1.65in |
| Jul | 84°F | 50°F | 0.85in |
| Aug | 82°F | 48°F | 0.8in |
| Sep | 72°F | 40°F | 0.81in |
| Oct | 57°F | 31°F | 0.94in |
| Nov | 43°F | 23°F | 1.45in |
| Dec | 34°F | 18°F | 1.33in |
If you're timing a visit, Jun, Jul, Aug, and Sep are Hamilton's mildest stretch; if you're moving there, you should plan around Dec's cold instead.
How wet Hamilton actually gets
Hamilton averages 13.6in of precipitation a year across roughly 107 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
Hamilton against the rest of the country
Out of 4876 cities scored here, Hamilton comes in at 3620; within MT alone it ranks 7 of 19. Population is about 5,383.
Checking the actual forecast
These figures come from Hamilton, MT US, the NOAA station 0.6 miles from Hamilton, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is