Hertfordshire (Stevenage)
September
Weather in Hertfordshire for September 2027
Your guide to Hertfordshire weather in September - trends and predictions
In general, the average temperature in Hertfordshire at the beginning of September is 22.2 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.6 °C by the end of September.
Hertfordshire experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 56.4 mm.
Is September a good time to visit Hertfordshire? check out the best time to travel to Hertfordshire page.
✨ Is September a good time to visit Hertfordshire? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
20
Dry days
10
Rainy days
0
Snow days
20°/12°
Temperatures
22 km/h
Avg max wind
72 %
Avg humidity
Hertfordshire Weather September
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Temperatures trend during September in Hertfordshire
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September weather in Hertfordshire day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 22° /13° | 2 mm | 5 | |
| 2 Sept. | Patchy rain possible | 21° /14° | 1.5 mm | 4 | |
| 3 Sept. |  Light rain | 22° /14° | 2.6 mm | 4 | |
| 4 Sept. | Light rain | 20° /13° | 5.1 mm | 4 | |
| 5 Sept. | Patchy rain possible | 22° /12° | 1.8 mm | 5 | |
| 6 Sept. |  Overcast | 25° /15° | 0.4 mm | 5 | |
| 7 Sept. | Patchy rain possible | 24° /15° | 1.6 mm | 5 | |
| 8 Sept. | Light rain | 21° /14° | 7 mm | 5 | |
| 9 Sept. | Overcast | 21° /12° | 0 mm | 4.9 | |
| 10 Sept. | Light rain shower | 22° /13° | 2.1 mm | 4 | |
| 11 Sept. |  Cloudy | 19° /12° | 0.9 mm | 4 | |
| 12 Sept. |  Mist | 18° /10° | 0.8 mm | 3 | |
| 13 Sept. | Patchy rain possible | 18° /11° | 1.9 mm | 3 | |
| 14 Sept. | Patchy rain possible | 19° /11° | 1.5 mm | 4 | |
| 15 Sept. | Patchy rain possible | 21° /12° | 0.1 mm | 4 | |
| 16 Sept. | Patchy rain possible | 20° /11° | 0.1 mm | 4 | |
| 17 Sept. | Patchy rain possible | 19° /12° | 2.2 mm | 4 | |
| 18 Sept. | Patchy rain possible | 21° /12° | 1.5 mm | 4 | |
| 19 Sept. |  Partly cloudy | 21° /13° | 0.6 mm | 4 | |
| 20 Sept. | Light rain | 20° /12° | 4.7 mm | 3.9 | |
| 21 Sept. | Patchy light drizzle | 19° /10° | 1.3 mm | 3.8 | |
| 22 Sept. | Light rain | 18° /11° | 4.7 mm | 3 | |
| 23 Sept. | Patchy rain possible | 17° /10° | 0.1 mm | 3 | |
| 24 Sept. | Overcast | 18° /10° | 0.9 mm | 3 | |
| 25 Sept. | Patchy rain possible | 19° /11° | 1.2 mm | 3.5 | |
| 26 Sept. |  Thundery outbreaks possible | 18° /10° | 1.7 mm | 3 | |
| 27 Sept. | Patchy rain possible | 17° /10° | 2 mm | 3 | |
| 28 Sept. | Overcast | 17° /9° | 0 mm | 3 | |
| 29 Sept. | Patchy rain possible | 18° /10° | 0.9 mm | 3 | |
| 30 Sept. | Light rain | 18° /11° | 5.1 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Hertfordshire 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 Hertfordshire forecast closer to your planned date for the most up-to-date weather information.
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Hertfordshire in September - FAQ
What are the expected maximum and minimum temperatures in Hertfordshire 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 Hertfordshire during September?
Moderate rainfall is anticipated in Hertfordshire during September, with a total of 56.4 mm spread over approximately 10 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Hertfordshire during September?
The average wind speed in Hertfordshire during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Hertfordshire
Explore the daily rainfall trends and prepare for Hertfordshires September weather 💧
Typically, Hertfordshire has 10 rainy days in September with a total of 56.4 mm of rainfall.
UV exposure in Hertfordshire during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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