Climate Insights for Siikajoki

The climate in Siikajoki is cool. The average annual temperature is 4°C and approximately 635mm of precipitation falls per year. August is the wettest month, receiving around 89mm of rainfall. Siikajoki 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 -10°C. Snowfall occurs from January to December, with around 123cm accumulating over the season.

Temperatures in Siikajoki vary considerably across the year, with a 29°C difference between the coldest and warmest months. Juli is the warmest month, though highs remain moderate at 19°C with a mean of 16°C. The coldest month is Januar, when overnight lows fall to -10°C and the daily average is -7°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.

Siikajoki is a relatively dry area, receiving approximately 635mm of precipitation annually, which averages out to around 53mm per month. The wettest month is August, averaging 89mm of rainfall. July and October also tend to see above-average precipitation. The driest month is March, with just 29mm. That's 60mm less than August, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Snowfall is a regular feature from January to December, with around 123cm accumulating over the season. December typically sees the most snow at around 26cm.

Siikajoki is moderately windy, with an average annual wind speed of 21km/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 24km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 17km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 7km/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 23km/h in winter, 20km/h in spring, 19km/h in summer, 22km/h in autumn.

It is currently winter in Siikajoki, which began on December 21, 2026. Siikajoki 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 19°C, while the coldest stretch bottoms out in Januar near -10°C. Spring is next, beginning on March 20, 2026 — 1 days from now.

The best time to visit Siikajoki is during Juli and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 84mm per month. By contrast, Januar can be quite cold with temperatures dropping to -10°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 Siikajoki 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.