Climate Insights for Izumi

The climate in Izumi is warm and mild. The average annual temperature is 19°C and approximately 2483mm of precipitation falls per year. Izumi receives a notable amount of rainfall throughout the year, including during its driest month. Izumi 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 7°C.

Temperatures in Izumi vary considerably across the year, with a 23°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 30°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 7°C and an average of 9°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between November and December, with a 5°C shift in average temperatures.

Izumi is a very wet location, receiving approximately 2483mm of precipitation annually, which averages out to around 207mm per month. The wettest month is June, averaging 488mm of rainfall. July and May also tend to see above-average precipitation. The driest month is January, with just 90mm. That's 398mm less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Izumi 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 December, averaging 22km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in September, 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 6km/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 22km/h in winter, 18km/h in spring, 17km/h in summer, 17km/h in autumn.

It is currently spring in Izumi, which began on March 20, 2026. Izumi 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 30°C, while the coldest stretch bottoms out in January near 7°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The table below shows monthly climate averages for Izumi 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.