Climate Insights for Izumiōtsu

The climate in Izumiōtsu is temperate. The average annual temperature is 17°C and approximately 1602mm of precipitation falls per year. Izumiōtsu receives a notable amount of rainfall throughout the year, including during its driest month. Izumiōtsu 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 2°C.

Temperatures in Izumiōtsu vary considerably across the year, with a 32°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 34°C and the mean temperature sits around 29°C. January is the coolest month, with minimum temperatures around 2°C and an average of 6°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between September and October, with a 7°C shift in average temperatures.

Izumiōtsu is a fairly wet location, receiving approximately 1602mm of precipitation annually, which averages out to around 134mm per month. The wettest month is June, averaging 235mm of rainfall. July and September also tend to see above-average precipitation. The driest month is December, with just 56mm. That's 180mm less than June, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Izumiōtsu 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 February, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 12km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/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 15km/h in winter, 14km/h in spring, 12km/h in summer, 12km/h in autumn.

It is currently spring in Izumiōtsu, which began on March 20, 2026. Izumiōtsu 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 34°C, while the coldest stretch bottoms out in January near 2°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The table below shows monthly climate averages for Izumiōtsu 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.