More rain falls on Os-Marsillon than on 89% of mainland French towns: 1,062 mm a year
January mornings start at about 2.0°C. By warm days alone, it ranks hotter than 87% of mainland French towns. Seasons differ by 26°C, from the coldest nights to the warmest afternoons. Keep the boiler serviced for the months from December to February, which average under 10°C.
These are the figures of Météo-France’s Pomps station, 13 km north-east.
A year in Os-Marsillon at a glance
Each month’s typical high and low in °C, at the Pomps station.
What a year in Os-Marsillon feels like
Typical highs and lows by season and by month, from Météo-France’s 1991–2020 normals at Pomps.
About 1,062 mm of rain a year
November is the wettest month and July the driest. About 36 days a year bring 10 mm or more. 44th wettest of 45 towns of 2,500+ in Pyrénées-Atlantiques.
Rain by month
Millimeters
Sunshine by month
Hours of sunshine at Pau-Uzein
36 frosts and 98 days of 25°C a year
On about 36 nights a year the air drops to 0°C or below; days that stay below freezing are rare. About 98 days a year reach 25°C, and 33 reach 30°C.
Day counts are Météo-France’s 1991–2020 normals at Pomps: 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 Pomps
Pomps is 13 km north-east of Os-Marsillon. Every figure on this page is the station’s, not a measurement in Os-Marsillon itself.
| Station (Météo-France number) | Pomps (64450001) |
| Distance from the town | 13 km north-east |
| Station altitude | 130 m |
| Town altitude (its center) | 100 m |
| Period | 1991–2020 |
| Sunshine measured at | Pau-Uzein, 16 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 Os-Marsillon 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 Pyrénées-Atlantiques.
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 |
|---|---|---|---|---|
| Os-Marsillon | Pomps | 27.4°C | 2.0°C | 1,062 mm |
| Mourenx 1.9 km | same station | 27.4°C about the same | 2.0°C about the same | 1,062 mm |
| Artix 4.1 km | same station | 27.4°C about the same | 2.0°C about the same | 1,062 mm |
| Monein 8.5 km | Monein | 26.6°C 0.8°C cooler | 3.6°C 1.6°C milder | 1,229 mm |
| Lescar 16 km | Pau-Uzein | 25.9°C 1.5°C cooler | 2.4°C about the same | 1,094 mm |
| Orthez 17 km | Orthez | 26.7°C 0.7°C cooler | 2.8°C 0.8°C milder | 1,212 mm |
| Sauvagnon 19 km | Pau-Uzein | 25.9°C 1.5°C cooler | 2.4°C about the same | 1,094 mm |
Os-Marsillon weather by month
Average daily high and low, mean temperature and rain, 1991–2020, at the Pomps station; sunshine at Pau-Uzein.
| Month | High | Low | Mean | Rain | Sun (hours) |
|---|---|---|---|---|---|
| January | 11.8°C | 2.0°C | 6.9°C | 101 mm | 101 |
| February | 13.1°C | 2.0°C | 7.6°C | 82 mm | 122 |
| March | 16.6°C | 4.5°C | 10.5°C | 85 mm | 164 |
| April | 18.7°C | 6.9°C | 12.8°C | 99 mm | 167 |
| May | 22.2°C | 10.7°C | 16.4°C | 95 mm | 186 |
| June | 25.3°C | 13.8°C | 19.6°C | 79 mm | 196 |
| July | 27.4°C | 15.3°C | 21.4°C | 60 mm | 213 |
| August | 28.0°C | 15.1°C | 21.6°C | 60 mm | 211 |
| September | 25.4°C | 12.2°C | 18.8°C | 81 mm | 193 |
| October | 21.2°C | 9.3°C | 15.2°C | 92 mm | 150 |
| November | 15.3°C | 5.1°C | 10.2°C | 131 mm | 107 |
| December | 12.7°C | 2.7°C | 7.7°C | 98 mm | 99 |
| Year | 19.8°C | 8.3°C | 14.1°C | 1,062 mm | 1,910 |
Where Os-Marsillon’s numbers come from
Averages over 30 years, not a forecast.
- Temperature, rain and day counts: Météo-France’s fiche climatologique for Pomps, 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, Pau-Uzein, 16 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 Pyrénées-Atlantiques.
Météo-France fiches climatologiques · IGN RGE ALTI®. Licence Ouverte 2.0.
Questions about Os-Marsillon’s climate
How warm does Os-Marsillon get in summer?
August is the warmest month, with average highs of 28.0°C. About 98 days a year reach 25°C, more than 87% of mainland French towns, and about 33 reach 30°C.
How cold does Os-Marsillon get in winter?
January nights average 2.0°C. The air drops to 0°C or below on about 36 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Os-Marsillon get?
About 1,062 mm a year, more than 89% of mainland French towns. November is the wettest month (131 mm) and July the driest (60 mm).
How sunny is it?
The nearest Météo-France station that records sunshine, Pau-Uzein (16 km away), averages 1,910 hours of sunshine a year.
Are these figures for Os-Marsillon itself?
No: they are the normals of the Météo-France station matched to Os-Marsillon, Pomps, 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 POMPS, edited 15/10/2026); altitude: IGN, RGE ALTI®. Licence Ouverte 2.0. Today’s forecast for Os-Marsillon →
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.