Climate Insights for Biei

The climate in Biei is cool. The average annual temperature is 6°C and approximately 1438mm of precipitation falls per year. Biei receives a notable amount of rainfall throughout the year, including during its driest month. Biei is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, December, when temperatures can drop to -12°C. Biei experiences heavy snowfall, typically from January through December.

Temperatures in Biei vary considerably across the year, with a 35°C difference between the coldest and warmest months. August is the warmest month, though highs remain moderate at 23°C with a mean of 20°C. The coldest month is January, when overnight lows fall to -12°C and the daily average is -8°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows. The sharpest temperature change occurs between September and October, with a 7°C shift in average temperatures.

Biei is a fairly wet location, receiving approximately 1438mm of precipitation annually, which averages out to around 120mm per month. The wettest month is August, averaging 201mm of rainfall. October and November also tend to see above-average precipitation. The driest month is February, with just 81mm. That's 120mm 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. Biei receives heavy snowfall, accumulating around 331cm annually from January through December. The snowiest month is December, with approximately 79cm. Winter travel should account for significant snow cover.

Biei 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 April, averaging 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 6km/h gap 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 13km/h in winter, 15km/h in spring, 11km/h in summer, 14km/h in autumn.

It is currently spring in Biei, which began on March 20, 2026. Biei 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 23°C, while the coldest stretch bottoms out in January near -12°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The table below shows monthly climate averages for Biei 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.