Last updated: June 18, 2025
In August, the average temperature in Saint-Thomas, Canada is a delightful 20°C (69°F). Expect a comfortable range, with minimums dipping to 6°C (43°F) and maximums soaring up to 33°C (91°F). Be prepared for some rain, as 104 mm (4.1 in) of precipitation falls over 13 days throughout the month, and with an average humidity of 75%, make sure to stay hydrated and enjoy the lush surroundings!
In August, in Saint-Thomas, the average temperature is 20°C (69°F). The maximum can reach 33°C (91°F), and the minimum can be as low as 6°C (43°F). This pleasant climate makes Saint-Thomas an ideal destination for travelers looking to enjoy a variety of outdoor activities.
In Saint-Thomas in August, the precipitation amount is 104 mm (4.1 in) over the course of 13 days.
In Saint-Thomas in August, humidity is 75%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel a bit muggy and requiring frequent hydration breaks to stay comfortable while exploring.
In Saint-Thomas in August, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Saint-Thomas.
UV Risk Categories
Weather in Saint-Thomas varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Saint-Thomas, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -9°C (15°F) | 83 mm (3.3 inches) | 93% | low |
| February Weather | -8°C (18°F) | 82 mm (3.2 inches) | 92% | moderate |
| March Weather | -3°C (27°F) | 85 mm (3.4 inches) | 86% | moderate |
| April Weather | 5°C (42°F) | 121 mm (4.8 inches) | 85% | high |
| May Weather | 13°C (56°F) | 96 mm (3.8 inches) | 80% | very high |
| June Weather | 19°C (66°F) | 95 mm (3.7 inches) | 74% | very high |
| July Weather | 22°C (71°F) | 89 mm (3.5 inches) | 76% | very high |
| August Weather | 20°C (69°F) | 104 mm (4.1 inches) | 75% | very high |
| September Weather | 16°C (60°F) | 64 mm (2.5 inches) | 78% | high |
| October Weather | 9°C (49°F) | 124 mm (4.9 inches) | 86% | moderate |
| November Weather | 0°C (33°F) | 114 mm (4.5 inches) | 88% | moderate |
| December Weather | -6°C (21°F) | 90 mm (3.5 inches) | 89% | low |