Climate averages 1991–2020
Boulogne-Billancourt weather
in January.
A cold, moderately wet month: the coolest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Boulogne-Billancourt: daytime highs average 7.3°C and nights cool to about 2.3°C. By daytime temperature it is the coolest month of the year.
Expect about 52 mm of rain on roughly 11 days, which makes January a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 8 h 45 min on an average January day.
The nearest other city in this atlas is Paris 15 Vaugirard (4 km away). In January its highs average 7.1°C, about as warm as Boulogne-Billancourt, with 52 mm of rain.
Among the 57 cities listed in France, Boulogne-Billancourt ranks joint 26th of 57 for the warmest January highs and joint 1st of 57 for the driest January (rainfall, lowest first). The mean January high of those 57 cities is 8.0°C; Boulogne-Billancourt is 0.7°C cooler than that mean.
From January to February, average highs rise by 1.2°C to 8.4°C, and monthly rainfall falls from 52 mm to 48 mm.
The annual picture
January in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Boulogne-Billancourt climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 7.3°C2.3°C | 2.3°C | 52 | 11.3 | 8.89 h |
| February | 8.4°C2.1°C | 2.1°C | 48 | 10.0 | 10.110 h |
| March | 11.9°C4.0°C | 4.0°C | 50 | 10.5 | 11.912 h |
| April | 15.1°C6.3°C | 6.3°C | 50 | 10.6 | 13.714 h |
| May | 18.6°C9.9°C | 9.9°C | 66 | 11.3 | 15.215 h |
| June | 21.8°C13.1°C | 13.1°C | 57 | 10.6 | 16.116 h |
| July | 24.1°C15.2°C | 15.2°C | 55 | 9.4 | 15.716 h |
| August | 24.2°C15.2°C | 15.2°C | 56 | 9.0 | 14.414 h |
| September | 20.7°C12.3°C | 12.3°C | 47 | 8.3 | 12.613 h |
| October | 16.1°C9.5°C | 9.5°C | 62 | 11.2 | 10.911 h |
| November | 10.8°C5.6°C | 5.6°C | 58 | 11.3 | 9.29 h |
| December | 7.7°C2.9°C | 2.9°C | 68 | 12.5 | 8.38 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
January in nearby cities
- Paris 15 Vaugirard in JanuaryFrance · 4 kmHigh 7.1°C · Low 2.0°C · 52 mm rain
- Paris in JanuaryFrance · 8 kmHigh 7.1°C · Low 1.8°C · 52 mm rain
- Paris 13 Gobelins in JanuaryFrance · 8 kmHigh 7.0°C · Low 1.8°C · 52 mm rain
- Versailles in JanuaryFrance · 9 kmHigh 6.6°C · Low 1.7°C · 52 mm rain
- Paris 20 Ménilmontant in JanuaryFrance · 12 kmHigh 6.7°C · Low 1.5°C · 53 mm rain
- Argenteuil in JanuaryFrance · 13 kmHigh 7.1°C · Low 2.1°C · 55 mm rain
- Créteil in JanuaryFrance · 17 kmHigh 7.0°C · Low 1.9°C · 53 mm rain
- Saint-Quentin-en-Yvelines in JanuaryFrance · 18 kmHigh 6.5°C · Low 1.5°C · 53 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Boulogne-Billancourt) is explained once on the Boulogne-Billancourt year overview and on the Sources, method and limits page.
Paris, Paris 15 Vaugirard and Paris 13 Gobelins lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.