Chester (MT) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Chester.
Climate overview of Chester
Temperatures in Chester, Montana, United States of America, vary greatly throughout the year. July is the hottest month at 29°C (84°F), while December is the coldest at -1°C (30°F).
Rain/snowfall is modest, totalling around 344 mm (14 in) annually. The city experiences a distinct dry season from July to April, with warm summers and very cold winters. June tends to be the wettest month.
Chester Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Chester - and find the best time to visit.
Monthly Temperature in Chester
The climate in Chester is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a comfortable 29°C (84°F) in July, the warmest time of the year, to a very cold -1°C (30°F) during cooler months like December.
At night, you can expect temperatures ranging from 12°C (54°F) in July to around -15°C (5°F) during December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Chester
With annual rain/snowfall averaging 344 mm (14 in), Chester maintains relatively low precipitation levels throughout the seasons. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, June it receives moderate rainfall, averaging 68 mm (2.7 in) of precipitation, recorded across 12 rainy days. In contrast, the driest month February brings less snowfall, with 11 mm (0.4 in) over 6 snowy days. For more details, please visit our Chester 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 Chester
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July, August and September
- Warmest weather: July and August
- Seasonal pattern: A distinct dry season from July to April, with warm summers and very cold winters
- Coldest conditions: December, with freezing nights around -15°C (5°F).
Frequently asked questions about the climate in Chester
What is the best time to visit Chester?
June, July, August and September typically offer the most optimal weather in Chester. In contrast, January, February and December tend to have less optimal conditions. Chester has a distinct dry season from July to April, with warm summers and very cold winters.
What temperatures can I expect in Chester?
Daytime highs range from -1°C (30°F) in December to 29°C (84°F) in July. Nighttime lows range from -15°C (5°F) to 12°C (54°F). Temperatures vary considerably through the year.
How much rain does Chester get?
Annual rainfall is around 344 mm (14 in). June is the wettest month with 68 mm (2.7 in), while February is the driest with 11 mm (0.4 in).
Chester 3-Day Forecast
Chester (MT) 3-Day Forecast
Chester on the map
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