Last updated: August 23, 2025
In August, the average temperature in Saint-Malo-des-Trois-Fontaines, France is a pleasant 18°C (64°F). Expect a range between a cool 7°C (45°F) at night and a warm 34°C (94°F) during the day. Be prepared for some rain, as 50 mm (1.9 in) of precipitation can be expected over 9 days. With an average humidity of 78%, it's a month that combines warmth with a touch of freshness.
In August in Saint-Malo-des-Trois-Fontaines, the average temperature is 18°C (64°F). Maximums can reach 34°C (94°F), and minimums can be as low as 7°C (45°F). Be prepared for a range of temperatures and pack accordingly for your trip!
In Saint-Malo-des-Trois-Fontaines in August, the precipitation amount is 50 mm (1.9 in) over the course of 9 days.
In Saint-Malo-des-Trois-Fontaines in August, humidity is 78%. With an average temperature of 18°C (64°F), this humidity feels like a warm, thick blanket wrapping around you, making traveling feel a bit sticky and sluggish, yet the coolness of the air tempers the intensity, inviting you to explore at a leisurely pace.
In Saint-Malo-des-Trois-Fontaines 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-Malo-des-Trois-Fontaines.
UV Risk Categories
Weather in Saint-Malo-des-Trois-Fontaines varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Saint-Malo-des-Trois-Fontaines, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (43°F) | 43 mm (1.7 inches) | 82% | low |
| February Weather | 7°C (45°F) | 64 mm (2.5 inches) | 83% | moderate |
| March Weather | 8°C (47°F) | 58 mm (2.3 inches) | 81% | moderate |
| April Weather | 11°C (52°F) | 47 mm (1.9 inches) | 82% | high |
| May Weather | 14°C (57°F) | 68 mm (2.7 inches) | 82% | very high |
| June Weather | 17°C (63°F) | 101 mm (4.0 inches) | 80% | very high |
| July Weather | 19°C (66°F) | 46 mm (1.8 inches) | 77% | very high |
| August Weather | 18°C (64°F) | 50 mm (1.9 inches) | 78% | very high |
| September Weather | 16°C (61°F) | 43 mm (1.7 inches) | 79% | high |
| October Weather | 13°C (55°F) | 87 mm (3.4 inches) | 82% | moderate |
| November Weather | 8°C (48°F) | 67 mm (2.7 inches) | 81% | low |
| December Weather | 7°C (46°F) | 92 mm (3.6 inches) | 82% | low |