Climate Insights for Carstairs

The climate in Carstairs is cool. The average annual temperature is 4°C and approximately 493mm of precipitation falls per year. June is the wettest month, receiving around 95mm of rainfall. Carstairs is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are February, December, January, when temperatures can drop to -13°C. Snowfall occurs from January to December, with around 96cm accumulating over the season.

Carstairs has a wide annual temperature range, spanning 38°C from the coldest to warmest months. August is the warmest month, though highs remain moderate at 25°C with a mean of 16°C. The coldest month is February, when overnight lows fall to -13°C and the daily average is -9°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 7°C shift in average temperatures.

Carstairs is a relatively dry area, receiving approximately 493mm of precipitation annually, which averages out to around 41mm per month. The wettest month is June, averaging 95mm of rainfall. July and August also tend to see above-average precipitation. The driest month is January, with just 11mm. That's 83mm less than June, 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 96cm accumulating over the season. November typically sees the most snow at around 16cm.

Carstairs is mildly breezy, with an average annual wind speed of 17km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is May, averaging 18km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, 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 2km/h between the calmest and windiest months.

It is currently spring in Carstairs, which began on March 20, 2026. Carstairs 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 August at around 25°C, while the coldest stretch bottoms out in February near -13°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Carstairs is during July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 74mm per month. By contrast, February can be quite cold with temperatures dropping to -13°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 Carstairs 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.