Historical estimate
Rain in Brest in December
- Probability:
- 57.4%
- Odds:
- 1.3 to 1
- dBan
- +1.3 dBan
The 1991–2020 Météo-France normal records at least 1 mm of precipitation on 17.8 of December’s 31 days at Brest-Guipavas.
Calculation
p ≈ 17.8 precipitation days / 31 December days = 0.57419
Assumptions
This is a climate-normal estimate for the Brest-Guipavas station, not all of Brittany. A day qualifies after at least 1 mm of measured precipitation, which does not imply all-day rain and is not a forecast.
Sources
- Météo-France climate normals: Brest-Guipavas 1991–2020 December normal: 17.8 days with at least 1 mm