Boulogne-sur-Mer Climate by Month
Boulogne-sur-Mer, Hauts-de-France, France
Mild summers and cool winters, with rain spread through the year.
The climate in Boulogne-sur-Mer is one of mild summers and cool winters, with rain spread through the year. August is the warmest month, with highs around 71°F (21°C); January is the coolest at 45°F (7°C), and nights dip to 38°F (3°C). About 25 in (628 mm) of rain falls in a typical year, with no clear rainy season. The air is humid, averaging 80% relative humidity.
- Warmest month
- 71°F(21°C)
- Average high, August
- Coldest nights
- 38°F(3°C)
- Average low, February
- Rain per year
- 25 in(628 mm)
- No clear rainy season
- Humidity
- 80%
- Sunniest: June
Best and worst months in Boulogne-sur-Mer
Best for weatherThe most comfortable weather comes in July and August, with highs around 70°F (21°C) and about 2.0 in (51 mm) of rain a month.
Least pleasantJanuary and February are the least pleasant; January is the coldest, with highs of only 45°F (7°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in August.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Boulogne-sur-Mer weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 45°F(7°C) | 38°F(4°C) | 2.3 in(58 mm) | 89% | 0.8 |
| FebFebruary | 46°F(8°C) | 38°F(3°C) | 2.0 in(52 mm) | 88% | 1.4 |
| MarMarch | 51°F(10°C) | 41°F(5°C) | 1.3 in(33 mm) | 76% | 2.6 |
| AprApril | 56°F(14°C) | 44°F(7°C) | 1.2 in(30 mm) | 72% | 4.3 |
| MayMay | 62°F(17°C) | 50°F(10°C) | 1.5 in(38 mm) | 79% | 4.8 |
| JunJune | 65°F(19°C) | 55°F(13°C) | 1.4 in(35 mm) | 79% | 5.3 |
| JulJulyBest | 69°F(21°C) | 59°F(15°C) | 1.7 in(43 mm) | 78% | 5.2 |
| AugAugustBest | 71°F(21°C) | 60°F(15°C) | 2.3 in(59 mm) | 76% | 4.3 |
| SepSeptember | 66°F(19°C) | 56°F(13°C) | 2.0 in(50 mm) | 76% | 3.2 |
| OctOctober | 60°F(15°C) | 51°F(10°C) | 2.9 in(73 mm) | 81% | 1.9 |
| NovNovember | 52°F(11°C) | 45°F(7°C) | 3.6 in(92 mm) | 87% | 0.9 |
| DecDecember | 47°F(8°C) | 40°F(4°C) | 2.6 in(65 mm) | 84% | 0.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
Places with a similar climate
All 20 places like Boulogne-sur-Mer →- 🇫🇷DieppeNormandy, France · Pop. 36k99%matchSame winter lowsSame summer highsBoulogne-sur-Mer vs Dieppe →
- 🇳🇱MiddelburgZeeland, The Netherlands · Pop. 46k98%matchSame winter lowsSame summer highsBoulogne-sur-Mer vs Middelburg →
- 🇫🇷Le HavreNormandy, France · Pop. 186k98%matchSame summer highsSame humidityBoulogne-sur-Mer vs Le Havre →
- 🇬🇧EastbourneEngland, United Kingdom · Pop. 102k97%matchSame winter lowsSame summer highsBoulogne-sur-Mer vs Eastbourne →
- 🇧🇪BruggeFlanders, Belgium · Pop. 119k97%matchSame humiditySame sunshineBoulogne-sur-Mer vs Brugge →