Custer (SD) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Custer.
Climate overview of Custer
Custer, South Dakota, United States of America, sees big temperature differences between seasons, with July peaking at 27°C (81°F) and February dropping to 2°C (36°F).
Annual rain/snowfall is moderate at around 526 mm (21 in), with May being the wettest month. The city also has a distinct dry season from October to March, with warm summers and very cold winters.
Custer Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Custer - and find the best time to visit.
Monthly Temperature in Custer
Visitors to Custer can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 27°C (81°F) in July. In February, the coolest month of the year, temperatures drop to a very cold 2°C (36°F).
At night, temperatures range from around 12°C (54°F) in July to -10°C (14°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Custer
Generally, Custer experiences moderate precipitation patterns, averaging 526 mm (21 in) yearly. Custer can be quite wet during May, receiving approximately 99 mm (3.9 in) of precipitation over 15 rainy days.
In contrast, during the driest month (January), you will experience much drier conditions, with 8.2 mm (0.3 in) of precipitation spread across 5 snowy days. For more details, please visit our Custer 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 Custer
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
- Fewest rainy days: January, February, November and December
- Seasonal pattern: A distinct dry season from October to March, with warm summers and very cold winters
- Coldest conditions: February, with freezing nights around -10°C (14°F).
Frequently asked questions about the climate in Custer
What is the best time to visit Custer?
June, July, August and September typically offer the most optimal weather in Custer. In contrast, January, February and December tend to have less optimal conditions. Custer has a distinct dry season from October to March, with warm summers and very cold winters.
What temperatures can I expect in Custer?
Daytime highs range from 2°C (36°F) in February to 27°C (81°F) in July. Nighttime lows range from -10°C (14°F) to 12°C (54°F). Temperatures vary considerably through the year.
How much rain does Custer get?
Annual rainfall is around 526 mm (21 in). May is the wettest month with 99 mm (3.9 in), while January is the driest with 8.2 mm (0.3 in).
Custer 3-Day Forecast
Custer (SD) 3-Day Forecast
Custer on the map
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