Climate Insights for Clewiston

The climate in Clewiston is warm and mild. The average annual temperature is 25°C and approximately 1279mm of precipitation falls per year. Clewiston receives a notable amount of rainfall throughout the year, including during its driest month. Clewiston is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, September. The coldest months are January, February, December, when temperatures can drop to 15°C.

Clewiston sees moderate temperature variation throughout the year, ranging from 15°C to 32°C. The warmest month is July, when average highs reach 32°C and the mean temperature sits around 29°C. January is the coolest month, with minimum temperatures around 15°C and an average of 19°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows. The sharpest temperature change occurs between October and November, with a 3°C shift in average temperatures.

Clewiston is a fairly wet location, receiving approximately 1279mm of precipitation annually, which averages out to around 107mm per month. The wettest month is August, averaging 221mm of rainfall. June and September also tend to see above-average precipitation. The driest month is February, with just 38mm. That's 184mm less than August, 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.

Clewiston is mildly breezy, with an average annual wind speed of 16km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 18km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 13km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/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 17km/h in winter, 18km/h in spring, 14km/h in summer, 16km/h in autumn.

It is currently spring in Clewiston, which began on March 20, 2026. Clewiston 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 July at around 32°C, while the coldest stretch bottoms out in January near 15°C. Summer is next, beginning on June 21, 2026 — 91 days from now.

The best time to visit Clewiston is during January, February, March, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 45mm per month. By contrast, July can be uncomfortably hot with temperatures reaching 32°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 Clewiston 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.