Harrow
September
Weather in Harrow for September 2026
Your guide to Harrow weather in September - trends and predictions
Until now, September 2026 in Harrow is slightly cooler than the historical average by 0.9 °C.
Expect cooler weather in the next days in Harrow with the forecast suggesting a temperature of 21 °C, lower than the historical average.
In general, the average temperature in Harrow at the beginning of September is 22.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.6 °C by the end of September.
Harrow experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 72.7 mm.
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Temperatures
Rain 🌧️
More
8
Dry days
22
Rainy days
0
Snow days
20°/12°
Temperatures
19 km/h
Avg max wind
70 %
Avg humidity
Harrow Weather September
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Temperatures trend during September in Harrow
See the weather trend as well as the moving average line
September weather in Harrow day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Overcast | 22° /13° | 4 mm | 5 | |
| 2 Sept. |  Patchy rain possible | 22° /14° | 1.6 mm | 4 | |
| 3 Sept. | Overcast | 23° /14° | 2.1 mm | 4 | |
| 4 Sept. |  Sunny | 21° /13° | 4.2 mm | 4 | |
| 5 Sept. |  Partly cloudy | 22° /13° | 2.5 mm | 5 | |
| 6 Sept. | Overcast | 25° /15° | 1.2 mm | 5 | |
| 7 Sept. | Patchy rain possible | 25° /16° | 1.5 mm | 5 | |
| 8 Sept. | Partly cloudy | 22° /15° | 9.5 mm | 5 | |
| 9 Sept. | Overcast | 22° /13° | 0 mm | 5 | |
| 10 Sept. | Overcast | 21° /12° | 0.3 mm | 4.1 | |
| 11 Sept. | Patchy rain possible | 23° /15° | 0.1 mm | 4.1 | |
| 12 Sept. | Overcast | 23° /14° | 0.4 mm | 4.3 | |
| 13 Sept. | Patchy rain possible | 22° /17° | 15.3 mm | 3.7 | |
| 14 Sept. | Sunny | 25° /16° | 0 mm | 7 | |
| 15 Sept. | Overcast | 24° /15° | 4.8 mm | 5 | |
| 16 Sept. | Patchy rain possible | 19° /12° | 1.9 mm | 4 | |
| 17 Sept. |  Cloudy | 20° /13° | 0 mm | 4 | |
| 18 Sept. | Overcast | 19° /13° | 2.3 mm | 4 | |
| 19 Sept. | Partly cloudy | 18° /12° | 2.9 mm | 5 | |
| 20 Sept. | Sunny | 18° /11° | 0 mm | 5 | |
| 21 Sept. | Overcast | 20° /12° | 0 mm | 5 | |
| 22 Sept. | Overcast | 19° /15° | 0.5 mm | 4 | |
| 23 Sept. | Sunny | 23° /14° | 0 mm | 6 | |
| 24 Sept. | Patchy rain possible | 18° /11° | 0.9 mm | 4 | |
| 25 Sept. | Overcast | 19° /11° | 1.1 mm | 4 | |
| 26 Sept. |  Thundery outbreaks possible | 18° /11° | 3.7 mm | 4 | |
| 27 Sept. | Patchy rain possible | 16° /10° | 3.1 mm | 4 | |
| 28 Sept. | Overcast | 17° /9° | 0 mm | 4 | |
| 29 Sept. | Patchy rain possible | 17° /10° | 0.8 mm | 4 | |
| 30 Sept. | Cloudy | 18° /10° | 6.6 mm | 4 | |
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Important Notice
Our weather forecast for Harrow in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Harrow forecast closer to your planned date for the most up-to-date weather information.
Change Month
Harrow in September - FAQ
What are the expected maximum and minimum temperatures in Harrow during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Harrow during September?
Moderate rainfall is anticipated in Harrow during September, with a total of 72.7 mm spread over approximately 22 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Harrow during September?
The average wind speed in Harrow during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Harrow
Explore the daily rainfall trends and prepare for Harrows September weather 💧
Typically, Harrow has 22 rainy days in September with a total of 72.7 mm of rainfall.
UV exposure in Harrow during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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