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Normal annual rainfall in Colnbrook
1991–2020 · 1 data point
Updated 21 Oct 2026
Source: NOAA National Centers for Environmental Information — GHCN-Daily, 1991–2020
Weather through the year long-term average 1991–2020 · Heathrow weather station, 4 km away
8°
2°
Jan
9°
2°
Feb
12°
4°
Mar
15°
6°
Apr
18°
9°
May
21°
12°
Jun
24°
14°
Jul
23°
14°
Aug
20°
10°
Sept
16°
7°
Oct
12°
5°
Nov
8°
3°
Dec
64
50
46
40
48
50
47
58
40
63
79
68
High and low, °C
Precipitation, mm
Source: NOAA National Centers for Environmental Information — GHCN-Daily, 1991–2020
What it means
How much rain and snow (as water) falls in a typical year.
How it is calculated
Sum of the twelve monthly precipitation normals at the nearest weather station: 1991–2020, or the latest ten years; months with a few missing days are scaled up.