Climate Insights for Altkirch

The climate in Altkirch is temperate. The average annual temperature is 11°C and approximately 1178mm of precipitation falls per year. Altkirch receives a notable amount of rainfall throughout the year, including during its driest month. Altkirch 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 January, February, December, when temperatures can drop to -1°C. Snowfall occurs from January to December, with around 57cm accumulating over the season.

Temperatures in Altkirch vary considerably across the year, with a 27°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 26°C and the mean temperature sits around 20°C. The coldest month is January, when overnight lows fall to -1°C and the daily average is 2°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 5°C shift in average temperatures.

Altkirch is a moderately rainy area, receiving approximately 1178mm of precipitation annually, which averages out to around 98mm per month. The wettest month is May, averaging 133mm of rainfall. June and January also tend to see above-average precipitation. The driest month is February, with just 75mm. That's 58mm less than May, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Snowfall is a regular feature from January to December, with around 57cm accumulating over the season. January typically sees the most snow at around 18cm.

Altkirch is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 11km/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 14km/h in winter, 13km/h in spring, 11km/h in summer, 12km/h in autumn.

It is currently spring in Altkirch, which began on March 20, 2026. Altkirch 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 26°C, while the coldest stretch bottoms out in January near -1°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Altkirch is during September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 15°C with modest rainfall averaging 85mm per month. By contrast, July can be uncomfortably hot with highs reaching 26°C, while January is the coldest period with lows dropping to -1°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Altkirch 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.