Climate averages 1991–2020
Calais weather
in July.
A mild, moderately wet month: the 2nd warmest and the joint 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in Calais: daytime highs average 20.5°C and nights cool to about 14.8°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 51 mm of rain on roughly 10 days, which makes July a moderately wet month (the joint 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 16 h 03 min on an average July day.
The nearest other city in this atlas is Dunkirk (38 km away). In July its highs average 21.5°C, 1.0°C warmer than Calais, with 57 mm of rain.
Among the 57 cities listed in France, Calais ranks 56th of 57 for the warmest July highs and joint 22nd of 57 for the driest July (rainfall, lowest first). The mean July high of those 57 cities is 24.9°C; Calais is 4.4°C cooler than that mean.
From July to August, average highs rise by 0.3°C to 20.8°C, and monthly rainfall rises from 51 mm to 65 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Calais climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.2°C3.4°C | 3.4°C | 79 | 14.3 | 8.58 h |
| February | 7.6°C3.3°C | 3.3°C | 60 | 11.5 | 10.010 h |
| March | 9.9°C4.7°C | 4.7°C | 51 | 10.5 | 11.812 h |
| April | 12.7°C6.6°C | 6.6°C | 45 | 9.3 | 13.814 h |
| May | 15.6°C9.6°C | 9.6°C | 51 | 9.8 | 15.516 h |
| June | 18.3°C12.4°C | 12.4°C | 49 | 8.7 | 16.416 h |
| July, selected | 20.5°C14.8°C | 14.8°C | 51 | 9.6 | 16.016 h |
| August | 20.8°C15.2°C | 15.2°C | 65 | 10.0 | 14.615 h |
| September | 18.4°C13.2°C | 13.2°C | 68 | 11.2 | 12.713 h |
| October | 14.9°C10.3°C | 10.3°C | 96 | 14.3 | 10.811 h |
| November | 10.7°C6.9°C | 6.9°C | 101 | 16.4 | 9.09 h |
| December | 7.8°C4.3°C | 4.3°C | 94 | 15.0 | 8.08 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Dunkirk in JulyFrance · 38 kmHigh 21.5°C · Low 14.6°C · 57 mm rain
- Saint Peters in JulyUnited Kingdom · 55 kmHigh 20.0°C · Low 14.8°C · 54 mm rain
- Hastings, United Kingdom in JulyUnited Kingdom · 90 kmHigh 19.9°C · Low 14.3°C · 46 mm rain
- Lille in JulyFrance · 91 kmHigh 22.5°C · Low 14.1°C · 61 mm rain
- Roubaix in JulyFrance · 97 kmHigh 22.4°C · Low 14.1°C · 65 mm rain
- Brugge in JulyBelgium · 100 kmHigh 21.0°C · Low 15.0°C · 65 mm rain
- Kortrijk in JulyBelgium · 100 kmHigh 22.2°C · Low 14.3°C · 65 mm rain
- Maidstone in JulyUnited Kingdom · 100 kmHigh 21.6°C · Low 14.0°C · 59 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Calais) is explained once on the Calais year overview and on the Sources, method and limits page.