Climate Insights for Coamo

The climate in Coamo is hot. The average annual temperature is 25°C and approximately 920mm of precipitation falls per year. Coamo receives a notable amount of rainfall throughout the year, including during its driest month. Coamo 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, March, January, when temperatures can drop to 22°C.

Coamo has relatively stable temperatures year-round, staying within a 7°C range. The warmest month is August, when average highs reach 29°C and the mean temperature sits around 27°C. February is the coolest month, with minimum temperatures around 22°C and an average of 24°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows.

Coamo is a moderately rainy area, receiving approximately 920mm of precipitation annually, which averages out to around 77mm per month. The wettest month is September, averaging 160mm of rainfall. November and October also tend to see above-average precipitation. The driest month is February, with just 33mm. That's 127mm less than September, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Coamo is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.

It is currently summer in Coamo, which began on June 21, 2026. Coamo 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 22°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.

The best time to visit Coamo is during January, February, March, April and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 44mm per month. By contrast, August can be uncomfortably hot with temperatures reaching 29°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Coamo 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.