Harrow
September
Weather in Harrow for September 2025
Your guide to Harrow weather in September - trends and predictions
In general, the average temperature in Harrow at the beginning of September is 23.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.3 °C by the end of September.
Harrow in September brings notable rainfall, with an average of 19 rainy days and a total precipitation of 90 mm.
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Temperatures
Rain 🌧️
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11
Dry days
19
Rainy days
0
Snow days
20°/13°
Temperatures
18 km/h
Avg max wind
71 %
Avg humidity
Harrow in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2  23° | 3 23° | 4  22° | 5  22° | 6 26° | 7 26° |
| 8 24° | 9 24° | 10 25° | 11 19° | 12 17° | 13 17° | 14 20° |
| 15 22° | 16 22° | 17 21° | 18 22° | 19  20° | 20  20° | 21 21° |
| 22 18° | 23 17° | 24  18° | 25 19° | 26  19° | 27 16° | 28 16° |
| 29 16° | 30 17° |
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Temperatures trend during September in Harrow
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Overcast | 23° /14° | 7 mm | 5 | |
| 2 Sept. | Patchy rain possible | 23° /16° | 0.3 mm | 5 | |
| 3 Sept. | Overcast | 23° /14° | 0.9 mm | 5 | |
| 4 Sept. | Sunny | 22° /14° | 4.6 mm | 6 | |
| 5 Sept. | Partly cloudy | 22° /15° | 5 mm | 6 | |
| 6 Sept. | Overcast | 26° /17° | 2.3 mm | 6 | |
| 7 Sept. | Sunny | 26° /16° | 2.8 mm | 7 | |
| 8 Sept. | Partly cloudy | 24° /17° | 12.3 mm | 6 | |
| 9 Sept. | Sunny | 24° /16° | 0 mm | 6 | |
| 10 Sept. | Partly cloudy | 25° /15° | 1.5 mm | 6 | |
| 11 Sept. | Partly cloudy | 19° /12° | 0.7 mm | 5 | |
| 12 Sept. | Overcast | 17° /11° | 0.5 mm | 4 | |
| 13 Sept. | Overcast | 17° /10° | 0 mm | 5 | |
| 14 Sept. | Partly cloudy | 20° /11° | 0 mm | 6 | |
| 15 Sept. | Sunny | 22° /12° | 0 mm | 6 | |
| 16 Sept. | Partly cloudy | 22° /13° | 0 mm | 6 | |
| 17 Sept. | Light rain shower | 21° /13° | 2.2 mm | 6 | |
| 18 Sept. | Light rain shower | 22° /12° | 3.5 mm | 5 | |
| 19 Sept. | Light rain | 20° /13° | 1.2 mm | 5 | |
| 20 Sept. | Moderate rain | 20° /13° | 9.3 mm | 5 | |
| 21 Sept. | Light rain shower | 21° /12° | 2.9 mm | 5 | |
| 22 Sept. | Patchy light drizzle | 18° /12° | 8.6 mm | 4 | |
| 23 Sept. | Partly cloudy | 17° /10° | 0.2 mm | 5 | |
| 24 Sept. | Cloudy | 18° /12° | 1.4 mm | 4 | |
| 25 Sept. | Overcast | 19° /12° | 1.6 mm | 5 | |
| 26 Sept. | Thundery outbreaks possible | 19° /12° | 5.5 mm | 5 | |
| 27 Sept. | Patchy rain possible | 16° /10° | 4.6 mm | 4 | |
| 28 Sept. | Overcast | 16° /9° | 0 mm | 4 | |
| 29 Sept. | Patchy rain possible | 16° /10° | 1.2 mm | 4 | |
| 30 Sept. | Cloudy | 17° /10° | 10 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.
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 13°. 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 90 mm spread over approximately 19 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 18 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 💧
UV exposure in Harrow during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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