Climate Insights for Seguin

The climate in Seguin is warm and mild. The average annual temperature is 22°C and approximately 800mm of precipitation falls per year. Seguin receives a notable amount of rainfall throughout the year, including during its driest month. Seguin is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are January, February, December, when temperatures can drop to 7°C.

Temperatures in Seguin vary considerably across the year, with a 30°C difference between the coldest and warmest months. August is the hottest month, with daytime highs reaching 37°C and an average of 30°C. January is the coolest month, with minimum temperatures around 7°C and an average of 12°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 6°C shift in average temperatures.

Seguin is a moderately rainy area, receiving approximately 800mm of precipitation annually, which averages out to around 67mm per month. The wettest month is May, averaging 112mm of rainfall. April and August also tend to see above-average precipitation. The driest month is February, with just 43mm. That's 68mm less than May, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Seguin is mildly breezy, with an average annual wind speed of 13km/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 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 5km/h gap between the calmest and windiest months.

It is currently summer in Seguin, which began on June 21, 2026. Seguin 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 37°C, while the coldest stretch bottoms out in January near 7°C. Autumn is next, beginning on September 23, 2026 (8 days from now).

The best time to visit Seguin is during March, April, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 64mm per month. By contrast, August can be uncomfortably hot with highs reaching 37°C, while January is the coldest period with lows dropping to 7°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 Seguin 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.