Harrow weather today: light drizzle, 12°C by day and 7°C overnight, with a 29% chance of rain and winds up to 12 mph. Seven-day forecast, updated every morning.
Harrow weather today: Light drizzle, 12°C by day and 7°C overnight, with a 29% chance of rain and winds up to 12 mph. Over the next seven days temperatures range from 6°C to 12°C, with Friday the wettest day in the outlook. Forecast checked 3 November 2026 at 05:20; the live reading below updates when you open this page.
Today, hour by hour
| Time | Weather | Temp | Rain chance | Wind |
|---|---|---|---|---|
| 05:00 | ☀️ Sunny | 7°C | 0% | 10 mph |
| 06:00 | ☀️ Sunny | 7°C | 0% | 10 mph |
| 07:00 | ☀️ Sunny | 7°C | 0% | 9 mph |
| 08:00 | ☀️ Sunny | 8°C | 0% | 10 mph |
| 09:00 | ☀️ Sunny | 9°C | 0% | 11 mph |
| 10:00 | ☀️ Sunny | 10°C | 0% | 12 mph |
| 11:00 | ☀️ Sunny | 11°C | 0% | 11 mph |
| 12:00 | 🌤️ Mostly sunny | 12°C | 0% | 11 mph |
| 13:00 | ☁️ Overcast | 12°C | 10% | 11 mph |
| 14:00 | ⛅ Partly cloudy | 12°C | 23% | 12 mph |
| 15:00 | 🌤️ Mostly sunny | 11°C | 29% | 12 mph |
| 16:00 | ⛅ Partly cloudy | 11°C | 23% | 11 mph |
Harrow seven-day forecast
| Day | Weather | High / low | Rain chance · total | Max wind | Sunrise / sunset |
|---|---|---|---|---|---|
| Today 3 Nov | 🌦️ Light drizzle | 12° / 7° | 29% · 0.4 mm | 12 mph | 06:58 / 16:30 |
| Tomorrow 4 Nov | ☁️ Overcast | 11° / 8° | 2% · 0.0 mm | 15 mph | 07:00 / 16:28 |
| Thursday 5 Nov | 🌦️ Light drizzle | 9° / 7° | 6% · 0.2 mm | 10 mph | 07:02 / 16:27 |
| Friday 6 Nov | 🌦️ Light drizzle | 10° / 7° | 7% · 0.7 mm | 5 mph | 07:03 / 16:25 |
| Saturday 7 Nov | 🌦️ Light drizzle | 10° / 8° | 8% · 0.3 mm | 3 mph | 07:05 / 16:23 |
| Sunday 8 Nov | ☁️ Overcast | 10° / 6° | 15% · 0.0 mm | 6 mph | 07:07 / 16:22 |
| Monday 9 Nov | ☁️ Overcast | 11° / 6° | 21% · 0.0 mm | 8 mph | 07:09 / 16:20 |
Harrow weather by month: what is normal
A forecast means more next to what is usual. The Met Office's nearest climate station to Harrow is Northolt, about four miles south-west of the town centre, so its 1991 to 2020 averages are the closest official yardstick for the weather in Harrow. Northolt does not record sunshine, so the sunshine column below comes from the Met Office station at Northwood, about four miles to the north-west. Averages checked against the Met Office on 2 November 2026.
| Month | Average high | Average low | Rainfall | Days with 1 mm+ of rain | Air frosts | Sunshine (Northwood) |
|---|---|---|---|---|---|---|
| January | 8.2°C | 2.0°C | 63 mm | 12 | 10 | 53 hrs |
| February | 8.8°C | 2.0°C | 49 mm | 10 | 8 | 70 hrs |
| March | 11.6°C | 3.5°C | 42 mm | 9 | 5 | 112 hrs |
| April | 14.8°C | 5.2°C | 46 mm | 9 | 2 | 164 hrs |
| May | 18.1°C | 8.3°C | 52 mm | 9 | 0 | 200 hrs |
| June | 21.2°C | 11.3°C | 50 mm | 9 | 0 | 197 hrs |
| July | 23.5°C | 13.4°C | 49 mm | 8 | 0 | 209 hrs |
| August | 23.1°C | 13.2°C | 57 mm | 9 | 0 | 193 hrs |
| September | 20.0°C | 10.6°C | 51 mm | 9 | 0 | 135 hrs |
| October | 15.6°C | 7.9°C | 70 mm | 11 | 1 | 109 hrs |
| November | 11.3°C | 4.5°C | 71 mm | 12 | 5 | 65 hrs |
| December | 8.6°C | 2.3°C | 63 mm | 11 | 10 | 51 hrs |
| Year | 15.4°C | 7.0°C | 663 mm | 117 | 42 | 1,556 hrs |
Averages: Met Office long-term averages, Northolt and Northwood (sunshine), 1991 to 2020, rounded.
Weather in Harrow: questions
What is the weather usually like in Harrow in November?
Wet, grey and turning cold. A normal November at Northolt peaks at about 11.3°C by day and falls to 4.5°C at night, with 71 mm of rain over 12 wet days, which makes it the wettest month of the year. Expect around five air frosts and only about 65 hours of sunshine in the whole month. With the clocks back, sunset in Harrow comes before 4pm by the last days of November.
What is the wettest month in Harrow?
November, at about 71 mm, a whisker ahead of October at 70 mm. March is the driest month at about 42 mm. Over a year the area gets roughly 663 mm of rain on about 117 days with at least 1 mm.
How cold does Harrow get in winter?
December to February average highs of 8.2 to 8.8°C and lows of about 2°C. December and January each bring about ten air frosts, and the yearly total at Northolt is about 42. Northwood, on higher ground to the north-west, records fewer, about 34 a year, so low-lying open ground tends to frost more often than the slopes.
Is Harrow getting warmer?
The Met Office figures say yes. Comparing Northolt's 1991 to 2020 averages with the 1981 to 2010 set, the average daytime high across the year rose from 14.4°C to 15.4°C, the average night-time low rose from 6.2°C to 7.0°C, and annual rainfall rose from about 616 mm to 663 mm.
When is the warmest and sunniest time in Harrow?
July, with an average high of 23.5°C at Northolt and about 209 hours of sunshine at Northwood. May and June are close behind on sunshine at about 200 and 197 hours.
Where does this Harrow weather forecast come from, and how often does it change?
The seven-day and hourly tables come from Open-Meteo's forecast for central Harrow and are rewritten every morning. The "right now" line at the top is fetched live each time the page loads. For official warnings, check the Met Office link below, which covers London along with the rest of the UK.
Warnings and what to check before you set off
- Met Office weather warnings for the whole of the UK, updated as they are issued.
- Flood warnings and river levels from the Environment Agency.
- Our roadworks and travel page for closures and rail changes this week.
Forecast data: Open-Meteo (CC BY 4.0), refreshed each morning for Harrow (51.581, -0.337). Temperatures in °C, wind in mph.
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