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The best time to visit Slough

Month-by-month climate averages for Slough, England, so you can pick your dates on data rather than guesswork.

Short answer

The most comfortable time to visit Slough is usually May, June, July and August, when daytime highs sit in the pleasant 16-26°C range and the heaviest September rain is behind you.

Slough is warmest in August (highs near 22°C) and coldest in January (lows around 2°C), with roughly 893 mm of precipitation across the year and September the wettest month. The sweet spot for most visitors is May, June, July and August.

These are long-run averages. For the actual days you are travelling, check the live Slough forecast — and note how much the models agree, because that tells you how much to trust it.

Slough weather by month

what to expect in Slough through the year

Here is Slough's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Slough by season.

Jan
8°
2°
Cool
Feb
11°
4°
Cool
Mar
11°
5°
Cool
Apr
13°
6°
Cool
May
18°
9°
Mild
Jun
21°
11°
Mild
Jul
21°
13°
Mild
Aug
22°
13°
Warm
Sep
21°
12°
Mild
Wettest
Oct
16°
9°
Mild
Nov
11°
5°
Cool
Dec
10°
5°
Cool

Common questions

When is the best time to visit Slough?
The most comfortable time to visit Slough is usually May, June, July and August, when daytime highs sit in the pleasant 16-26°C range and the heaviest September rain is behind you.
What is the warmest month in Slough?
August is the warmest month in Slough, averaging highs near 22°C.
What is the coldest month in Slough?
January is the coldest month in Slough, with lows around 2°C.
When is the rainy season in Slough?
The wettest month in Slough is usually September, out of roughly 893 mm of precipitation across the year.

Slough month by month

JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember