Castilly Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Castilly.
Climate overview of Castilly
The climate in Castilly, Lower Normandy, France, is marked by large temperature swings across the seasons, ranging from 23°C (73°F) in August to 10°C (50°F) in January.
Annual rainfall is moderate at around 825 mm (32 in), with December being the wettest month. The city also has warm summers and cold winters. June is the sunniest month, averaging 7.2 hours of sunshine per day.
Castilly Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Castilly - and find the best time to visit.
Monthly Temperature in Castilly
In Castilly, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a comfortable 23°C (73°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 10°C (50°F).
At night, temperatures range from around 15°C (59°F) in August to 4°C (39°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Castilly
On average, Castilly receives a reasonable amount of rainfall, with an annual precipitation of 825 mm (32 in). Castilly experiences moderate seasonal variation in rainfall, with monthly averages ranging from 90 mm (3.5 in) in December, the wettest month, and 53 mm (2.1 in) in July, the driest month. For more details, please visit our Castilly 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 Castilly
Castilly can be enjoyed more throughout the sunniest month of June under a blue sky, with approximately 7.2 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 2.0 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Castilly by Month
The city experiences its highest humidity in December, reaching 87%. In April, the humidity drops to its lowest level at 80%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Castilly
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July, August and September
- Warmest weather: July and August
- Most sunshine: June and July
- Fewest rainy days: June, July and August
- Seasonal pattern: Warm summers and cold winters
Frequently asked questions about the climate in Castilly
What is the best time to visit Castilly?
June, July, August and September typically offer the most optimal weather in Castilly. In contrast, January, February and December tend to have less optimal conditions. Castilly has warm summers and cold winters.
What temperatures can I expect in Castilly?
Daytime highs range from 10°C (50°F) in January to 23°C (73°F) in August. Nighttime lows range from 4°C (39°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Castilly get?
Annual rainfall is around 825 mm (32 in). December is the wettest month with 90 mm (3.5 in), while July is the driest with 53 mm (2.1 in).
How sunny is Castilly?
Castilly receives around 1,692 hours of sunshine per year. June is the sunniest month with 215 hours, while December is the cloudiest with just 60 hours.
Castilly 3-Day Forecast
Castilly on the map
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