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Istres Weather by Month
Average temperatures, rainfall and humidity for Istres, France, month by month, built from OpenWeather's historical records. Use it to see what a typical Istres month looks like before you travel — then check the live Istres forecast for the days ahead.
Warmest month
July
32°C average high
Coolest month
January
3°C average low
Wettest month
November
58 mm of rain
Driest month
August
18 mm of rain
Average temperature and rainfall in Istres by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 11°C | 3°C | -9°C / 19°C | 43 mm | 74% | 13 km/h |
| February | 13°C | 3°C | -10°C / 23°C | 38 mm | 72% | 13 km/h |
| March | 16°C | 6°C | -3°C / 23°C | 43 mm | 67% | 14 km/h |
| April | 19°C | 8°C | -2°C / 27°C | 35 mm | 62% | 13 km/h |
| May | 23°C | 12°C | 4°C / 32°C | 27 mm | 61% | 14 km/h |
| June | 29°C | 17°C | 9°C / 38°C | 25 mm | 56% | 12 km/h |
| July | 32°C | 20°C | 10°C / 39°C | 24 mm | 52% | 12 km/h |
| August | 31°C | 19°C | 8°C / 39°C | 18 mm | 54% | 11 km/h |
| September | 26°C | 15°C | 6°C / 35°C | 30 mm | 63% | 12 km/h |
| October | 21°C | 12°C | -1°C / 29°C | 40 mm | 72% | 12 km/h |
| November | 16°C | 7°C | -4°C / 24°C | 58 mm | 75% | 12 km/h |
| December | 12°C | 4°C | -12°C / 19°C | 47 mm | 77% | 11 km/h |
Best time to visit Istres
The most comfortable time to visit Istres is generally May and September to October, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around November, totalling about 428 mm a year.
Travellers who prefer heat should aim for July, when highs average 32°C. November is the month to avoid if rain would spoil your plans — it averages 58 mm, roughly 3× the rainfall of August.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Istres forecast for what is happening now.