Last updated: August 23, 2025
In March, the average temperature in Olonne-sur-Mer, France hovers around 10°C (50°F). Temperatures can vary significantly, with a minimum of -4°C (26°F) and a maximum reaching 18°C (64°F). Expect some rain, as 76 mm (3.0 in) of precipitation is likely over 13 days, contributing to a notable average humidity of 84%.
In March in Olonne-sur-Mer, the average temperature is 10°C (50°F), with maximums reaching 18°C (64°F) and minimums dropping as low as -4°C (26°F). Travelers should pack layers to comfortably adjust to the varied temperatures throughout the day.
In Olonne-sur-Mer in March, the total precipitation amount is 76 mm (3.0 in), which occurs over the course of 13 days.
In Olonne-sur-Mer in March, humidity is 84%. With an average temperature of 10°C (50°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor activities less comfortable and prompting travelers to seek refuge in cozy, warm cafes or indoor attractions.
In Olonne-sur-Mer in March, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Olonne-sur-Mer.
UV Risk Categories
Weather in Olonne-sur-Mer varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Olonne-sur-Mer, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 8°C (46°F) | 71 mm (2.8 inches) | 88% | low |
| February Weather | 9°C (48°F) | 78 mm (3.1 inches) | 87% | moderate |
| March Weather | 10°C (50°F) | 76 mm (3.0 inches) | 84% | moderate |
| April Weather | 12°C (54°F) | 35 mm (1.4 inches) | 83% | high |
| May Weather | 15°C (59°F) | 58 mm (2.3 inches) | 81% | very high |
| June Weather | 18°C (65°F) | 68 mm (2.7 inches) | 75% | very high |
| July Weather | 20°C (69°F) | 30 mm (1.2 inches) | 65% | very high |
| August Weather | 20°C (68°F) | 37 mm (1.5 inches) | 67% | very high |
| September Weather | 18°C (65°F) | 46 mm (1.8 inches) | 75% | high |
| October Weather | 15°C (59°F) | 87 mm (3.4 inches) | 85% | moderate |
| November Weather | 11°C (52°F) | 106 mm (4.2 inches) | 88% | moderate |
| December Weather | 10°C (50°F) | 140 mm (5.5 inches) | 90% | low |