Saint-Germain-en-Laye Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Saint-Germain-en-Laye.
Climate overview of Saint-Germain-en-Laye
Saint-Germain-en-Laye, Ile de France, France, sees big temperature differences between seasons, with July peaking at 25°C (77°F) and January dropping to 8°C (46°F).
Saint-Germain-en-Laye sees a moderate amount of rain/snowfall, totalling around 745 mm (29 in) per year. It experiences warm summers and cold winters, creating some seasonal variation. The most sunshine falls in July, with an average of 7.5 hours of daily sunshine.
Saint-Germain-en-Laye Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Saint-Germain-en-Laye - and find the best time to visit.
Monthly Temperature in Saint-Germain-en-Laye
Visitors to Saint-Germain-en-Laye can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 25°C (77°F) in July, the warmest time of the year, to a chilly 8°C (46°F) during cooler months like January.
At night, you can expect temperatures ranging from 14°C (57°F) in July to around 2°C (36°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Saint-Germain-en-Laye
Generally, Saint-Germain-en-Laye experiences moderate precipitation patterns, averaging 745 mm (29 in) yearly. Year-round, Saint-Germain-en-Laye has a balanced climate with minimal variation in precipitation. The difference between the wettest month, December, with 75 mm (3 in), and the driest month, September, with 52 mm (2 in), is minimal. For more details, please visit our Saint-Germain-en-Laye Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Saint-Germain-en-Laye
Seasonal changes in sunshine hours are quite dramatic in Saint-Germain-en-Laye. While July receives considerable daily sunshine with up to 7.5 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.9 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Saint-Germain-en-Laye by Month
The relative humidity is high throughout the year in Saint-Germain-en-Laye.
The city experiences its highest humidity in November, reaching 84%. In April, the humidity drops to its lowest level at 69%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Saint-Germain-en-Laye
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, July, August and September
- Warmest weather: July and August
- Most sunshine: July and August
- Fewer rainy days: June, July, August, September and October
- Seasonal pattern: Warm summers and cold winters
Frequently asked questions about the climate in Saint-Germain-en-Laye
What is the best time to visit Saint-Germain-en-Laye?
May, June, July, August and September typically offer the most optimal weather in Saint-Germain-en-Laye. In contrast, January, February and December tend to have less optimal conditions. Saint-Germain-en-Laye has warm summers and cold winters.
What temperatures can I expect in Saint-Germain-en-Laye?
Daytime highs range from 8°C (46°F) in January to 25°C (77°F) in July. Nighttime lows range from 2°C (36°F) to 14°C (57°F). Temperatures vary considerably through the year.
How much rain does Saint-Germain-en-Laye get?
Annual rainfall is around 745 mm (29 in). December is the wettest month with 75 mm (3 in), while September is the driest with 52 mm (2 in).
How sunny is Saint-Germain-en-Laye?
Saint-Germain-en-Laye receives around 1,725 hours of sunshine per year. July is the sunniest month with 224 hours, while December is the cloudiest with just 58 hours.
Saint-Germain-en-Laye 3-Day Forecast
Saint-Germain-en-Laye 3-Day Forecast
Saint-Germain-en-Laye on the map
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