Harefield weather
Loading live data…Latest for Harefield: Met Office (UKMO model): 11° Light rain · European (ECMWF): 11° Light rain · American (NOAA GFS): 11° Drizzle.
CheckWeather.io on iPhoneFree. No ads, no account.Harefield weather warnings
Met Office yellow, amber and red warnings for London & South East EnglandChecking the Met Office for warnings in force for London & South East England…
Harefield weather in numbers
measured normals and 10 years of recorded weatherHarefield swings 19°C across the year, from 21°C highs in July to 2°C lows in January, and October is usually the wettest month in a year that brings about 664 mm of precipitation. Over 10 years of recorded weather it averages 18 days a year at 25°C or above, 2 of them at 30°C or above, 28 frost nights, and rain on 137 days.
Day counts are from the ERA5 reanalysis for Harefield’s grid square, 2016 to 2025, counted the same way for every city so the numbers compare. A reanalysis square is an area, not a weather station, so it is good for counting days and not for a single day’s record.
The weather map: all three models at once
Met Office, European, American side by side around Harefield and nearby towns.Live rain radar →Harefield hourly forecast: next 14 hours
consensus of the three modelsRain in the next 24 hours, model by model
each model's own hourly precipitation, side by sideLoading the three models…
Harefield 10-day forecast, out to 14 days
where the models agree, and where they splitHarefield, England is at its warmest in Jul (average highs near 21°C) and coldest in Jan (lows around 2°C), with roughly 664 mm of precipitation across the year. Below, compare what Met Office, European, American forecast for Harefield 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.
Harefield climate by month
average daytime high and overnight low across a typical year (1991-2020)Source: 1991-2020 averages, ERA5 for this place adjusted with NASA POWER.
How the weather around Harefield has changed since 1995
Harefield sits in the same roughly 50 km square of NASA's reanalysis as Slough. That square ran 0.6°C warmer in 2015-2024 than in 1995-2004. See the full 30-year picture on the Slough page.
Which forecast is most accurate in Harefield?
CheckWeather Score, graded against the weather that actually happened
The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1950 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.
What do you think of the forecasts?
your vote countsThe accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United Kingdom? Give each 1 to 5 stars.
One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.