Climate averages 1991–2020
Boulogne-Billancourt weather
in December.
A cold, moderately wet month: the 11th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Boulogne-Billancourt: daytime highs average 7.7°C and nights cool to about 2.9°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 68 mm of rain on roughly 13 days, which makes December a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 8 h 21 min on an average December day.
The nearest other city in this atlas is Paris 15 Vaugirard (4 km away). In December its highs average 7.5°C, about as warm as Boulogne-Billancourt, with 68 mm of rain.
Among the 57 cities listed in France, Boulogne-Billancourt ranks joint 27th of 57 for the warmest December highs and joint 11th of 57 for the driest December (rainfall, lowest first). The mean December high of those 57 cities is 8.5°C; Boulogne-Billancourt is 0.8°C cooler than that mean.
From December to January, average highs fall by 0.4°C to 7.3°C, and monthly rainfall falls from 68 mm to 52 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Paris 15 Vaugirard in DecemberFrance · 4 kmHigh 7.5°C · Low 2.6°C · 68 mm rain
- Paris in DecemberFrance · 8 kmHigh 7.5°C · Low 2.4°C · 68 mm rain
- Paris 13 Gobelins in DecemberFrance · 8 kmHigh 7.4°C · Low 2.4°C · 68 mm rain
- Versailles in DecemberFrance · 9 kmHigh 7.0°C · Low 2.3°C · 68 mm rain
- Paris 20 Ménilmontant in DecemberFrance · 12 kmHigh 7.1°C · Low 2.1°C · 71 mm rain
- Argenteuil in DecemberFrance · 13 kmHigh 7.5°C · Low 2.7°C · 71 mm rain
- Créteil in DecemberFrance · 17 kmHigh 7.5°C · Low 2.6°C · 71 mm rain
- Saint-Quentin-en-Yvelines in DecemberFrance · 18 kmHigh 6.9°C · Low 2.0°C · 68 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.