Few mainland French towns get less rain than Port-de-Bouc: 573 mm a year
The coldest hours of a January night bottom out at 3.4°C on average. Seasons differ by 27°C, from the coldest nights to the warmest afternoons. In July, afternoons here are warmer than in 94% of mainland French towns. Keep the boiler serviced for the months from December to February, which average under 10°C.
These are the figures of Météo-France’s Istres station, 13 km north.
A year in Port-de-Bouc at a glance
Each month’s typical high and low in °C, at the Istres station.
What a year in Port-de-Bouc feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Istres.
About 573 mm of rain a year
October is the wettest month and July the driest. About 17 days a year bring 10 mm or more. 80th wettest of 108 towns of 2,500+ in Bouches-du-Rhône.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Marignane
17 frosts and 116 days of 25°C a year
On about 17 nights a year the air drops to 0°C or below; days that stay below freezing are rare. About 116 days a year reach 25°C, and 49 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Istres: a frost is a night of 0°C or below, a summer day (jour d’été) 25°C or more, a hot day (forte chaleur) 30°C or more.
The Météo-France station at Istres
Istres is 13 km north of Port-de-Bouc. Every figure on this page is the station’s, not a measurement in Port-de-Bouc itself.
| Station (Météo-France number) | Istres (13047001) |
| Distance from the town | 13 km north |
| Station altitude | 23 m |
| Town altitude (its center) | 12 m |
| Period | 1991–2020 |
| Nearest station of any kind | 10 km |
| Sunshine measured at | Marignane, 18 km away |
TownRatings matches each commune to one station with at least 24 years of temperature and rain records: the nearest, counting every 100 m of height difference as 10 km, never across the sea.
How Port-de-Bouc compares
Against the 4,385 towns of 2,500 or more in mainland France, each read from its own matched station. The dots are the other towns of 2,500+ in Bouches-du-Rhône.
Nearby towns’ climate
The nearest towns of 2,500+ within 29 km. Where a neighbor uses the same station its figures are the same: the differences you’d feel over a few kilometers aren’t in the normals.
| Town | Station | July high | January low | Rain a year |
|---|---|---|---|---|
| Port-de-Bouc | Istres | 30.7°C | 3.4°C | 573 mm |
| Martigues 5 km | Marignane | 30.7°C about the same | 3.6°C about the same | 532 mm |
| Saint-Mitre-les-Remparts 5.7 km | same station | 30.7°C about the same | 3.4°C about the same | 573 mm |
| Fos-sur-Mer 6 km | same station | 30.7°C about the same | 3.4°C about the same | 573 mm |
| Istres 11 km | same station | 30.7°C about the same | 3.4°C about the same | 573 mm |
| Sausset-les-Pins 13 km | Marignane | 30.7°C about the same | 3.6°C about the same | 532 mm |
| Châteauneuf-les-Martigues 14 km | Marignane | 30.7°C about the same | 3.6°C about the same | 532 mm |
Port-de-Bouc weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Istres station; sunshine at Marignane.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 11.6°C | 3.4°C | 7.5°C | 56 mm | 148 |
| February | 12.7°C | 3.5°C | 8.1°C | 34 mm | 173 |
| March | 16.4°C | 6.2°C | 11.3°C | 32 mm | 235 |
| April | 19.1°C | 8.8°C | 14.0°C | 59 mm | 251 |
| May | 23.2°C | 12.6°C | 17.9°C | 43 mm | 299 |
| June | 27.8°C | 16.6°C | 22.2°C | 28 mm | 338 |
| July | 30.7°C | 19.2°C | 24.9°C | 13 mm | 372 |
| August | 30.4°C | 19.0°C | 24.7°C | 23 mm | 334 |
| September | 25.8°C | 15.4°C | 20.6°C | 80 mm | 264 |
| October | 21.0°C | 12.2°C | 16.6°C | 87 mm | 196 |
| November | 15.4°C | 7.4°C | 11.4°C | 76 mm | 151 |
| December | 12.1°C | 4.2°C | 8.2°C | 44 mm | 138 |
| Year | 20.5°C | 10.7°C | 15.6°C | 573 mm | 2,898 |
Where Port-de-Bouc’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Istres, 13 km away: statistics for 1991–2020.
- Which station: among stations with at least 24 of the 30 years of temperature and rain, the nearest to the commune’s population-weighted center, counting each 100 m of height difference as 10 km; mainland towns use mainland stations and each overseas département its own.
- Altitudes: the town’s from IGN’s RGE ALTI® at its population-weighted center; the station’s from Météo-France.
- Sunshine: the nearest station with at least 10 years of sunshine records, Marignane, 18 km away.
- Comparisons: every town of 2,500 or more in mainland France, read the same way; the dots are the towns of 2,500+ in Bouches-du-Rhône.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Port-de-Bouc’s climate
How warm does Port-de-Bouc get in summer?
July is the warmest month, with average highs of 30.7°C. About 116 days a year reach 25°C, more than 94% of mainland French towns, and about 49 reach 30°C.
How cold does Port-de-Bouc get in winter?
January nights average 3.4°C. The air drops to 0°C or below on about 17 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Port-de-Bouc get?
About 573 mm a year, less than 98% of mainland French towns. October is the wettest month (87 mm) and July the driest (13 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Marignane (18 km away), averages 2,898 hours of sunshine a year.
Are these figures for Port-de-Bouc itself?
No: they are the normals of the Météo-France station matched to Port-de-Bouc, Istres, 13 km away. France publishes its climate normals by station, not by commune; a valley, a hill or the sea can make a difference over a few kilometers.
Where do these figures come from?
Météo-France’s fiches climatologiques: 30-year averages (1991–2020) for each of its long-running stations, published as open data since 2024. They are normals, not a forecast.
Source: Météo-France, fiches climatologiques, 1991–2020 statistics (station ISTRES, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Port-de-Bouc →
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.