Climate Insights for Hilo

The climate in Hilo is warm and mild. The average annual temperature is 22°C and approximately 2009mm of precipitation falls per year. Hilo receives a notable amount of rainfall throughout the year, including during its driest month. Hilo is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: September, August, October. The coldest months are February, March, January, when temperatures can drop to 20°C.

Hilo has relatively stable temperatures year-round, staying within a 6°C range. The warmest month is September, when average highs reach 26°C and the mean temperature sits around 24°C. February is the coolest month, with minimum temperatures around 20°C and an average of 21°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows.

Hilo is a very wet location, receiving approximately 2009mm of precipitation annually, which averages out to around 167mm per month. The wettest month is February, averaging 216mm of rainfall. March and April also tend to see above-average precipitation. The driest month is June, with just 111mm. That's 105mm less than February, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Hilo is relatively calm, with an average annual wind speed of 11km/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 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 9km/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 12km/h in winter, 11km/h in spring, 10km/h in summer, 9km/h in autumn.

It is currently summer in Hilo, which began on June 21, 2026. Hilo 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 September at around 26°C, while the coldest stretch bottoms out in February near 20°C. Autumn is next, beginning on September 23, 2026 (7 days from now).

The table below shows monthly climate averages for Hilo 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.