Climate Insights for Karjalohja

The climate in Karjalohja is cool. The average annual temperature is 7°C and approximately 705mm of precipitation falls per year. Karjalohja receives a notable amount of rainfall throughout the year, including during its driest month. Karjalohja is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: Juli, August, Juni. The coldest months are Januar, Februar, März, when temperatures can drop to -6°C. Snowfall occurs from January to December, with around 115cm accumulating over the season.

Temperatures in Karjalohja vary considerably across the year, with a 27°C difference between the coldest and warmest months. Juli is the warmest month, though highs remain moderate at 21°C with a mean of 17°C. The coldest month is Januar, when overnight lows fall to -6°C and the daily average is -4°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between April and May, with a 7°C shift in average temperatures.

Karjalohja is a relatively dry area, receiving approximately 705mm of precipitation annually, which averages out to around 59mm per month. The wettest month is August, averaging 87mm of rainfall. July and January also tend to see above-average precipitation. The driest month is March, with just 41mm. That's 46mm less than August, 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 115cm accumulating over the season. January typically sees the most snow at around 33cm.

Karjalohja 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 January, averaging 20km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in May, 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 20km/h in winter, 17km/h in spring, 17km/h in summer, 19km/h in autumn.

It is currently winter in Karjalohja, which began on December 21, 2026. Karjalohja 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 Juli at around 21°C, while the coldest stretch bottoms out in Januar near -6°C. Spring is next, beginning on March 20, 2026 — 1 days from now.

The best time to visit Karjalohja is during Juni, Juli and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 75mm per month. By contrast, Januar can be quite cold with temperatures dropping to -6°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 Karjalohja 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.