Climate Insights for Kirkkonummi

The climate in Kirkkonummi is hot. The average annual temperature is 26°C and approximately 34mm of precipitation falls per year. January is the wettest month, receiving around 33mm of rainfall. Kirkkonummi is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, November, June. The coldest months are August, November, July, when temperatures can drop to 15°C.

Kirkkonummi sees moderate temperature variation throughout the year, ranging from 15°C to 34°C. The warmest month is September, when average highs reach 34°C and the mean temperature sits around 29°C. August is the coolest month, with minimum temperatures around 15°C and an average of 22°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between August and September, with a 7°C shift in average temperatures.

Kirkkonummi is a quite dry location, receiving approximately 34mm of precipitation annually, which averages out to around 3mm per month. The wettest month is January, averaging 33mm of rainfall. October also tend to see above-average precipitation. The driest month is February, with just 0mm. That's 33mm less than January, 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.

Kirkkonummi is relatively calm, with an average annual wind speed of 4km/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 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 5km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 6km/h in winter, 5km/h in spring, 3km/h in summer, 4km/h in autumn.

It is currently summer in Kirkkonummi, which began on June 21, 2026. Kirkkonummi 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 September at around 34°C, while the coldest stretch bottoms out in August near 15°C. Autumn is next, beginning on September 23, 2026 — 18 days from now.

The best time to visit Kirkkonummi is during February and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 0mm per month. By contrast, September can be uncomfortably hot with temperatures reaching 34°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Kirkkonummi 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. 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.