Climate Insights for Custer

The climate in Custer is cool. The average annual temperature is 7°C and approximately 659mm of precipitation falls per year. May is the wettest month, receiving around 116mm of rainfall. Custer is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are February, January, December, when temperatures can drop to -9°C. Snowfall occurs from January to December, with around 122cm accumulating over the season.

Custer has a wide annual temperature range, spanning 36°C from the coldest to warmest months. The warmest month is July, when average highs reach 27°C and the mean temperature sits around 20°C. The coldest month is February, when overnight lows fall to -9°C and the daily average is -4°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 8°C shift in average temperatures.

Custer is a relatively dry area, receiving approximately 659mm of precipitation annually, which averages out to around 55mm per month. The wettest month is May, averaging 116mm of rainfall. June and July also tend to see above-average precipitation. The driest month is January, with just 15mm. That's 101mm less than May, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 122cm accumulating over the season. April typically sees the most snow at around 25cm.

Custer is mildly breezy, with an average annual wind speed of 18km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 20km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 19km/h in winter, 19km/h in spring, 16km/h in summer, 18km/h in autumn.

It is currently spring in Custer, which began on March 20, 2026. Custer is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 27°C, while the coldest stretch bottoms out in February near -9°C. Summer is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Custer is during July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 69mm per month. By contrast, February can be quite cold with temperatures dropping to -9°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Custer based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.