Climate Overview
The climate in Hiroo is cool. The average annual temperature is 8°C and approximately 1302mm of precipitation falls per year. Hiroo receives a notable amount of rainfall throughout the year, including during its driest month. Hiroo 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 -8°C. Snowfall occurs from January to December, with around 156cm accumulating over the season.
Temperature
Temperatures in Hiroo vary considerably across the year, with a 31°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 -8°C and the daily average is -5°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between November and December, with a 7°C shift in average temperatures.
Precipitation
Hiroo is a fairly wet location, receiving approximately 1302mm of precipitation annually, which averages out to around 109mm per month. The wettest month is August, averaging 204mm of rainfall. September and October also tend to see above-average precipitation. The driest month is February, with just 62mm. That's 142mm 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 156cm accumulating over the season. January typically sees the most snow at around 40cm.
Wind
Hiroo is mildly breezy, with an average annual wind speed of 20km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 23km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in July, with average winds dropping to 14km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 9km/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 22km/h in winter, 20km/h in spring, 15km/h in summer, 20km/h in autumn.
Seasons
89 days until Summer
It is currently spring in Hiroo, which began on March 20, 2026. Hiroo 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 -8°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from -2 to 15°C. Precipitation is moderate at around 294mm for the season, averaging 98mm per month. Winds are moderate at around 20km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 12 to 23°C. Rainfall is heavy, totalling around 413mm across the season with a monthly average of 138mm. Winds are moderate at around 15km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 3 to 21°C. Rainfall is heavy, totalling around 401mm across the season with a monthly average of 134mm. Expect around 6cm of snow accumulation during this period. Winds are moderate at around 20km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -8 to 2°C. Precipitation is moderate at around 193mm for the season, averaging 64mm per month. Expect around 99cm of snow accumulation during this period. Winds are moderate at around 22km/h. Warm winter clothing and waterproof boots are a must, and travel may be affected by snow.
Monthly Climate Data
The table below shows monthly climate averages for Hiroo 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.
