Poissy Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Poissy.
Climate overview of Poissy
Temperatures in Poissy, Ile de France, France, vary greatly throughout the year. July is the hottest month at 25°C (77°F), while January is the coldest at 8°C (46°F).
The city receives around 745 mm (29 in) of rain/snowfall per year. It experiences warm summers and cold winters. December is the wettest month and September the driest. Sunshine peaks in July, when the city sees around 7.5 hours of sunshine per day.
Poissy Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Poissy - and find the best time to visit.
Monthly Temperature in Poissy
The climate in Poissy is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a comfortable 25°C (77°F) in July to a chilly 8°C (46°F) in January.
Nighttime temperatures range from 14°C (57°F) in July to 2°C (36°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Poissy
Generally, Poissy receives mid-range precipitation levels, with 745 mm (29 in) annually. The wettest period in Poissy occurs in December, which receives around 75 mm (3 in) of precipitation. During the driest month, September, Poissy experiences moderate rainfall, totaling 52 mm (2 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Poissy 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 Poissy
In Poissy, summer days are longer and more sunny, with daily sunshine hours peaking at 7.5 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.9 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Poissy by Month
The relative humidity is high throughout the year in Poissy.
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 Poissy
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 Poissy
What is the best time to visit Poissy?
May, June, July, August and September typically offer the most optimal weather in Poissy. In contrast, January, February and December tend to have less optimal conditions. Poissy has warm summers and cold winters.
What temperatures can I expect in Poissy?
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 Poissy 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 Poissy?
Poissy 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.
Poissy 3-Day Forecast
Poissy on the map
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