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Hourly Forecast
Daylight Hours
07:44
Sunrise
19:46
Sunset
Moon
Waxing Gibbous
17:38
Moonrise
01:03
Moonset
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View stargazing scoreWeather in Calais tomorrow, September 21, 2026
Expect a muted, overcast feel in Calais on September 21, 2026 as cloud persists. Brighter breaks, if they arrive, should stay brief. Expect a grey start, with morning cloud around 100% by 04:00. Outdoor plans early on should not rely on bright skies.
Expect highs of 19°C and cooler readings close to 10°C. Expect humidity between 58% and 92%, most humid near 03:00. Expect gentle winds, highest near 14:00 at 2.2 km/h.
Through the afternoon cloud remains the main feature, with cover near 85% around 12:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 22.0 km, briefly nearer 3.5 km. Daylight runs from 07:45 to 19:43, lasting 11 hours 58 minutes of sunlight today.
Overall, Calais on September 21, 2026 stays grey and muted, so outdoor plans may want a flexible backup even with a high near 19°C.
Frequently asked questions about weather in Calais
How warm does it get in Calais?
The warmest month in Calais is August, with average high temperatures of 20°C. The average temperature during this period is around 18°C.
How cold does it get in Calais?
The coldest month in Calais is January, with average low temperatures of 5°C. The average temperature during this period is around 6°C.
What is the wettest time of year in Calais?
The wettest month in Calais is November, with an average of 117mm of precipitation.
What is the driest time of year in Calais?
The driest month in Calais is April, with an average of 48mm of precipitation.
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