Hamilton (MT) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Hamilton.
Climate overview of Hamilton
Hamilton, Montana, United States of America, sees big temperature differences between seasons, with July peaking at 31°C (88°F) and December dropping to 2°C (36°F).
With around 320 mm (13 in) of annual rain/snowfall, Hamilton has a fairly dry climate. However, it has very little rainfall year-round, with very warm summers and very cold winters. The wettest month is November, while July sees the least rain.
Hamilton Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Hamilton - and find the best time to visit.
Monthly Temperature in Hamilton
Visitors to Hamilton can expect significant temperature changes throughout the year. Average daytime temperatures reach a very warm 31°C (88°F) in July. In December, the coolest month of the year, temperatures drop to a very cold 2°C (36°F).
At night, temperatures range from around 10°C (50°F) in July to -8°C (18°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Hamilton
Hamilton tends toward drier weather patterns, receiving approximately 320 mm (13 in) of rain/snow per year. Hamilton experiences moderate seasonal variation in snowfall, with monthly averages ranging from 38 mm (1.5 in) in November, the wettest month, and 18 mm (0.7 in) in July, the driest month. For more details, please visit our Hamilton Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Hamilton
Each month is rated for comfortable sightseeing weather — mild temperatures and low rainfall. Tap a month for its full averages; your ideal time may differ for a beach or winter trip (see below).
- Best overall: June, August and September
- Warmest weather: July and August
- Fewest rainy days: July, August and September
- Climate seasons: very little rainfall year-round, with very warm summers and very cold winters
- Best for winter weather: December, with freezing nights around -8°C (18°F).
Frequently asked questions about the climate in Hamilton
What is the best time to visit Hamilton?
June, August and September typically offer the most optimal weather in Hamilton. In contrast, January, November and December tend to have less optimal conditions. Hamilton has very little rainfall year-round, with very warm summers and very cold winters.
What temperatures can I expect in Hamilton?
Daytime highs range from 2°C (36°F) in December to 31°C (88°F) in July. Nighttime lows range from -8°C (18°F) to 10°C (50°F). Temperatures vary considerably through the year.
How much rain does Hamilton get?
Annual rainfall is around 320 mm (13 in). November is the wettest month with 38 mm (1.5 in), while July is the driest with 18 mm (0.7 in). In the coldest months, precipitation may fall as snow.
Hamilton 3-Day Forecast
Hamilton (MT) 3-Day Forecast
Hamilton on the map
Hamilton is highlighted - select any city to see its climate.
Popular this month
Where to go in July - average daytime high across popular destinations.
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