Climate Insights for Georgetown

The climate in Georgetown is warm and mild. The average annual temperature is 20°C and approximately 1097mm of precipitation falls per year. August is the wettest month, receiving around 231mm of rainfall. Georgetown is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to 5°C.

Temperatures in Georgetown vary considerably across the year, with a 31°C difference between the coldest and warmest months. July is the hottest month, with daytime highs reaching 36°C and an average of 30°C. January is the coolest month, with minimum temperatures around 5°C and an average of 9°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between November and December, with a 6°C shift in average temperatures.

Georgetown is a moderately rainy area, receiving approximately 1097mm of precipitation annually, which averages out to around 91mm per month. The wettest month is August, averaging 231mm of rainfall. May and November also tend to see above-average precipitation. The driest month is January, with just 19mm. That's 212mm 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.

Georgetown 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 March, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, 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 1km/h gap between the calmest and windiest months.

It is currently summer in Georgetown, which began on June 21, 2026. Georgetown 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 36°C, while the coldest stretch bottoms out in January near 5°C. Autumn is next, beginning on September 23, 2026 — 52 days from now.

The best time to visit Georgetown is during October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 21mm per month. By contrast, July can be uncomfortably hot with highs reaching 36°C, while January is the coldest period with lows dropping to 5°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Georgetown 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.