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CheckWeather UKHarrow
Forecast confidence: High · models disagree by 1°C

Harrow weather

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Cloudy,cooler tomorrow

Met Office, the European and the American model agree on a high near 26° in Harrow today. Tomorrow looks cloudy around 23°, with a 12% chance of rain.

26°14°
23°17°
20°14°
20°12°
19°12°
22°15°
Todaymodels agreeTomorrowmodels agreeTuesdaymodels agreeWednesdaymodels agreeThursdaysplit ±3°Fridaymodels agree
Met OfficeUKMO model
26°
Cloudy
Today 26°·Low 14°·Rain -
EuropeanECMWF
26°
Cloudy
Today 26°·Low 13°·Rain 22%
AmericanNOAA GFS
25°
Light drizzle
Today 25°·Low 15°·Rain 13%

The weather map: all three models at once

Met Office, European, American side by side around Harrow and nearby towns.Live rain radar →
Loading the three model maps…

Next 14 hours

consensus of the three models

14-day forecast

where the models agree, and where they split
Today
Cloudy
26° 14°
models agree
Tomorrow
Cloudy
23° 17°
models agree
Tue
Drizzle
20° 14°
models agree
Wed
Cloudy
20° 12°
models agree
Thu
Light drizzle
19° 12°
±3°
Fri
Light drizzle
22° 15°
models agree
Sat
Cloudy
22° 12°
±4°
Sun
Light drizzle
23° 16°
±3°
Mon
Cloudy
23° 14°
±3°
Tue
Light drizzle
22° 16°
±2°
Wed
Light drizzle
20° 14°
±7°
Thu
Partly cloudy
22° 12°
±8°
Fri
Light rain
18° 14°
±5°
Sat
Light drizzle
19° 12°
±5°

Harrow, England is at its warmest in Aug (average highs near 22°C) and coldest in Jan (lows around 2°C), with roughly 912 mm of precipitation across the year. Below, compare what Met Office, European, American forecast for Harrow right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United Kingdom before you trust any single number.

Harrow climate by month

average daytime high and overnight low across a typical year
Jan
Feb
10°
Mar
11°
Apr
13°
May
17°
Jun
21°
11°
Jul
21°
13°
Aug
22°
13°
Sep
21°
12°
Oct
16°
Nov
10°
Dec

Which forecast is most accurate in Harrow?

CheckWeather Score — graded against the weather that actually happened
ProviderCheckWeather Score🌡 Temp💨 Wind🌧 RainRun by
European logo
European ★ Best
97
/100rank #1
95±0.3°C96±1.2 mph100100% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
Met Office logo
Met Office
81
/100rank #2
91±0.5°C96±1.3 mph5877% hitMet Office (United Kingdom)Exeter, United Kingdom
American logo
American
79
/100rank #3
89±0.6°C94±1.9 mph5877% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 1880 cities. Lower error means a higher score. See which forecast model is most accurate in United Kingdom, how we measure forecast accuracy, or which model each weather app uses.

Where the models disagree

temperature and rain, judged separately
DayTemperatureRain
Today±1°25° to 26°±9%13% to 22% chance
Tomorrow±1°22° to 23°±3%9% to 12% chance
Tue±2°19° to 21°±10%53% to 63% chance
Wed±1°19° to 21°±1%2% to 3% chance
Thu±3°17° to 20°±6%14% to 20% chance

The models often agree on temperature and still split on rain — and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.

Sunrise and sunset in Harrow

today, local time
Sunrise
06:22
Sunset
19:37
Daylight
13h 15m

Common questions

What's the weather in Harrow today?
On this page we show what Met Office, European, American each forecast for Harrow today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Harrow today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from Met Office, European, American for Harrow and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Harrow?
Over the last 30 days, the European model has been the most accurate for Harrow (CheckWeather Score 97/100), ahead of the Met Office at 81. We grade every model against the recorded weather. See the UK accuracy scoreboard for the full method.
What is the warmest month in Harrow?
August is typically the warmest month in Harrow, with average highs around 22°C.
How cold does Harrow get?
The coldest month in Harrow is January, when overnight lows average about 2°C.
How much rain does Harrow get?
Harrow sees roughly 912 mm of precipitation a year, with September usually the wettest month.

Nearby

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