Landerneau climate by month
What the weather is like
Landerneau has an oceanic climate (Köppen Cfb): rain spread through the year and no real dry season.
The warmest month is August, when afternoons average 22° and nights 13°. January is the coolest month, with highs of 10° and lows of 5°. The difference between the warmest and the coolest month is about 10°.
About 1,125 mm of precipitation falls in an average year. January is the wettest month (128 mm, 18 wet days) and September the driest (80 mm, 9 wet days). Cloud cover ranges from 36% in August to 50% in January.
The sea reaches about 15° in August. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Paris, the capital, Landerneau is 3.7° cooler on a August afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 22° · August
- Coldest nights
- 4° · February
- Wettest month
- January
- Driest month
- September
- Clearest skies
- August · 36% cloud
- Warmest sea
- 15° · August
- Longest day
- 16 h 05 min
- Shortest day
- 8 h 20 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 10° | 11° | 13° | 15° | 18° | 20° | 22° | 22° | 20° | 17° | 13° | 10° |
| Average low | 5° | 4° | 5° | 6° | 9° | 11° | 13° | 13° | 11° | 10° | 7° | 5° |
| Precipitation | 128 mm | 97 mm | 90 mm | 87 mm | 80 mm | 58 mm | 65 mm | 62 mm | 80 mm | 120 mm | 121 mm | 137 mm |
| Wet days (≥1 mm) | 17.8 | 14.8 | 14 | 11 | 11.9 | 10.4 | 11.6 | 11.8 | 9.3 | 15.5 | 17.1 | 17.1 |
| Cloud cover | 50% | 48% | 47% | 40% | 40% | 38% | 37% | 36% | 37% | 43% | 46% | 48% |
| Sea temperature | 11° | 10° | 10° | 11° | 12° | 14° | 15° | 15° | 15° | 14° | 13° | 12° |
| Daylight | 8h 45 | 10h 13 | 11h 50 | 13h 40 | 15h 13 | 16h 05 | 15h 44 | 14h 23 | 12h 38 | 10h 53 | 9h 15 | 8h 20 |
| Month score | 17 | 21 | 32 | 54 | 67 | 72 | 70 | 70 | 75 | 55 | 34 | 20 |