Climate Insights for Ōkawa

The climate in Ōkawa is temperate. The average annual temperature is 17°C and approximately 2169mm of precipitation falls per year. Ōkawa receives a notable amount of rainfall throughout the year, including during its driest month. Ōkawa 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 February, January, December, when temperatures can drop to 5°C.

Temperatures in Ōkawa vary considerably across the year, with a 26°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 31°C and the mean temperature sits around 28°C. February is the coolest month, with minimum temperatures around 5°C and an average of 8°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows. The sharpest temperature change occurs between October and November, with a 5°C shift in average temperatures.

Ōkawa is a very wet location, receiving approximately 2169mm of precipitation annually, which averages out to around 181mm per month. The wettest month is July, averaging 434mm of rainfall. June and September also tend to see above-average precipitation. The driest month is November, with just 79mm. That's 355mm less than July, 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.

Ōkawa is relatively calm, with an average annual wind speed of 3km/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 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.

It is currently spring in Ōkawa, which began on March 20, 2026. Ōkawa 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 31°C, while the coldest stretch bottoms out in February near 5°C. Summer is next, beginning on June 21, 2026 — 3 days from now.

The table below shows monthly climate averages for Ōkawa 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.