Climate Overview
The climate in Kailua-Kona is warm and mild. The average annual temperature is 22°C and approximately 3160mm of precipitation falls per year. Kailua-Kona receives a notable amount of rainfall throughout the year, including during its driest month. Kailua-Kona is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, September, October. The coldest months are February, January, March, when temperatures can drop to 19°C.
Temperature
Kailua-Kona has relatively stable temperatures year-round, staying within a 6°C range. The warmest month is August, when average highs reach 25°C and the mean temperature sits around 24°C. February is the coolest month, with minimum temperatures around 19°C and an average of 21°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows.
Precipitation
Kailua-Kona is a very wet location, receiving approximately 3160mm of precipitation annually, which averages out to around 263mm per month. The wettest month is August, averaging 425mm of rainfall. June and July also tend to see above-average precipitation. The driest month is March, with just 141mm. That's 284mm 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.
Wind
Kailua-Kona is relatively calm, with an average annual wind speed of 7km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is June, averaging 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.
Seasons
7 days until Autumn
It is currently summer in Kailua-Kona, which began on June 21, 2026. Kailua-Kona 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 25°C, while the coldest stretch bottoms out in February near 19°C. Autumn is next, beginning on September 23, 2026 (7 days from now).
Spring
Temperatures range from 20 to 24°C. Rainfall is heavy, totalling around 759mm across the season with a monthly average of 253mm. Winds are generally light, averaging 7km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 21 to 25°C. Rainfall is heavy, totalling around 1200mm across the season with a monthly average of 400mm. Winds are generally light, averaging 7km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.
Autumn
Temperatures range from 21 to 25°C. Rainfall is heavy, totalling around 708mm across the season with a monthly average of 236mm. Winds are generally light, averaging 6km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 19 to 24°C. Rainfall is heavy, totalling around 493mm across the season with a monthly average of 164mm. Winds are generally light, averaging 7km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Kailua-Kona 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.
