Climate Insights for Guiuan

The climate in Guiuan is hot. The average annual temperature is 27°C and approximately 2922mm of precipitation falls per year. Guiuan receives a notable amount of rainfall throughout the year, including during its driest month. Guiuan is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, September, June. The coldest months are February, January, March, when temperatures can drop to 25°C.

Guiuan has relatively stable temperatures year-round, staying within a 4°C range. The warmest month is August, when average highs reach 29°C and the mean temperature sits around 28°C. February is the coolest month, with minimum temperatures around 25°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.

Guiuan is a very wet location, receiving approximately 2922mm of precipitation annually, which averages out to around 244mm per month. The wettest month is December, averaging 460mm of rainfall. January and November also tend to see above-average precipitation. The driest month is April, with just 101mm. That's 359mm less than December, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Guiuan is relatively calm, with an average annual wind speed of 5km/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 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 4km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 7km/h in winter, 5km/h in spring, 4km/h in summer, 4km/h in autumn.

It is currently summer in Guiuan, which began on June 21, 2026. Guiuan 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 29°C, while the coldest stretch bottoms out in February near 25°C. Autumn is next, beginning on September 23, 2026 — 91 days from now.

The table below shows monthly climate averages for Guiuan 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.