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CheckWeather UK›Harrow›Best time to visit

The best time to visit Harrow

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

Short answer

The most comfortable time to visit Harrow 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.

Harrow is warmest in August (highs near 22°C) and coldest in January (lows around 2°C), with roughly 912 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 Harrow forecast — and note how much the models agree, because that tells you how much to trust it.

Harrow weather by month

what to expect in Harrow through the year

Here is Harrow'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 Harrow by season.

Jan
8°
2°
Cool
Feb
10°
4°
Cool
Mar
11°
5°
Cool
Apr
13°
6°
Cool
May
17°
9°
Mild
Jun
21°
11°
Mild
Jul
21°
13°
Mild
Aug
22°
13°
Warm
Sep
21°
12°
Mild
Wettest
Oct
16°
9°
Mild
Nov
10°
5°
Cool
Dec
9°
5°
Cool

Common questions

When is the best time to visit Harrow?
The most comfortable time to visit Harrow 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 Harrow?
August is the warmest month in Harrow, averaging highs near 22°C.
What is the coldest month in Harrow?
January is the coldest month in Harrow, with lows around 2°C.
When is the rainy season in Harrow?
The wettest month in Harrow is usually September, out of roughly 912 mm of precipitation across the year.

Harrow month by month

JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember