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Mont-de-Marsan, Nouvelle-Aquitaine climate
Cfa Humid subtropical
Mont-de-Marsan has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 28°C, while the coldest is January averaging around 1°C at night. Precipitation is fairly even year-round, totalling about 849 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsMont-de-Marsan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 11 | 13 | 17 | 19 | 23 | 26 | 28 | 29 | 25 | 21 | 15 | 12 |
| Avg temp (°C) | 6 | 7 | 10 | 13 | 16 | 20 | 22 | 22 | 18 | 14 | 9 | 7 |
| Avg low (°C) | 1 | 1 | 3 | 6 | 10 | 13 | 15 | 15 | 11 | 8 | 4 | 2 |
| Precipitation (mm) | 78 | 60 | 63 | 83 | 75 | 71 | 50 | 49 | 69 | 78 | 98 | 77 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 11 | 13 | 17 | 19 | 23 | 26 |
| Avg temp (°C) | 6 | 7 | 10 | 13 | 16 | 20 |
| Avg low (°C) | 1 | 1 | 3 | 6 | 10 | 13 |
| Precipitation (mm) | 78 | 60 | 63 | 83 | 75 | 71 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 29 | 25 | 21 | 15 | 12 |
| Avg temp (°C) | 22 | 22 | 18 | 14 | 9 | 7 |
| Avg low (°C) | 15 | 15 | 11 | 8 | 4 | 2 |
| Precipitation (mm) | 50 | 49 | 69 | 78 | 98 | 77 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 15 | 13 | 12 | 14 | 15 | 12 | 10 | 11 | 13 | 15 | 15 | 15 |
| Days with high ≥ 32°C (days) | — | — | — | 0.0 | 0.6 | 3 | 6 | 6 | 1 | 0.1 | — | — |
| Days with low ≤ 0°C (days) | 9 | 10 | 6 | 2 | 0.2 | — | — | — | — | 1 | 4 | 8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 15 | 13 | 12 | 14 | 15 | 12 |
| Days with high ≥ 32°C (days) | — | — | — | 0.0 | 0.6 | 3 |
| Days with low ≤ 0°C (days) | 9 | 10 | 6 | 2 | 0.2 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 11 | 13 | 15 | 15 | 15 |
| Days with high ≥ 32°C (days) | 6 | 6 | 1 | 0.1 | — | — |
| Days with low ≤ 0°C (days) | — | — | — | 1 | 4 | 8 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 64 | 64 | 68 | 68 | 63 | 58 | 57 | 57 | 64 | 68 | 67 |
| Clear days (≤ 30% cloud) | 4 | 5 | 6 | 4 | 5 | 5 | 6 | 7 | 7 | 5 | 3 | 5 |
| Partly cloudy days (30–70%) | 9 | 9 | 9 | 9 | 9 | 10 | 12 | 12 | 10 | 10 | 10 | 9 |
| Cloudy days (≥ 70%) | 17 | 15 | 16 | 17 | 18 | 15 | 13 | 12 | 12 | 15 | 17 | 17 |
| Relative humidity (%) | 89 | 85 | 80 | 77 | 74 | 72 | 69 | 68 | 71 | 79 | 87 | 90 |
| Wind speed (m/s) | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 64 | 64 | 68 | 68 | 63 |
| Clear days (≤ 30% cloud) | 4 | 5 | 6 | 4 | 5 | 5 |
| Partly cloudy days (30–70%) | 9 | 9 | 9 | 9 | 9 | 10 |
| Cloudy days (≥ 70%) | 17 | 15 | 16 | 17 | 18 | 15 |
| Relative humidity (%) | 89 | 85 | 80 | 77 | 74 | 72 |
| Wind speed (m/s) | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 57 | 57 | 64 | 68 | 67 |
| Clear days (≤ 30% cloud) | 6 | 7 | 7 | 5 | 3 | 5 |
| Partly cloudy days (30–70%) | 12 | 12 | 10 | 10 | 10 | 9 |
| Cloudy days (≥ 70%) | 13 | 12 | 12 | 15 | 17 | 17 |
| Relative humidity (%) | 69 | 68 | 71 | 79 | 87 | 90 |
| Wind speed (m/s) | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Mont DE Marsan, a weather station, about 3 km from the city centre. The underlying daily records come from NOAA's global station network.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.