Leiden
September
Weather in Leiden for September 2025
Your guide to Leiden weather in September - trends and predictions
Moderate Wind Warning - See hour by hour.
Until now, September 2025 in Leiden is slightly cooler than the historical average by -1.5 °C.
Expect cooler weather in the next days in Leiden with the forecast suggesting a temperature of 19.3 °C, lower than the historical average.
In general, the average temperature in Leiden at the beginning of September is 22.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18 °C by the end of September.
Leiden in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 111 mm.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
10
Dry days
20
Rainy days
0
Snow days
20°/15°
Temperatures
23 km/h
Avg max wind
72 %
Avg humidity
Leiden Weather September
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Temperatures trend during September in Leiden
See the weather trend as well as the moving average line
September weather in Leiden day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 22° /15° | 1.5 mm | 5 | |
| 2 Sept. |  Mist | 21° /16° | 5.9 mm | 5 | |
| 3 Sept. | Light rain shower | 21° /16° | 1.6 mm | 5 | |
| 4 Sept. |  Sunny | 21° /15° | 0.6 mm | 5 | |
| 5 Sept. | Sunny | 24° /16° | 0.2 mm | 6 | |
| 6 Sept. | Sunny | 25° /16° | 2.9 mm | 6 | |
| 7 Sept. | Sunny | 26° /17° | 0.2 mm | 6 | |
| 8 Sept. | Sunny | 22° /16° | 1 mm | 6 | |
| 9 Sept. | Light rain shower | 20° /16° | 2 mm | 4 | |
| 10 Sept. | Sunny | 22° /15° | 3.2 mm | 6 | |
| 11 Sept. | Light rain shower | 19° /15° | 6.3 mm | 4 | |
| 12 Sept. | Light rain shower | 17° /13° | 9.5 mm | 4 | |
| 13 Sept. | Light rain shower | 16° /12° | 7.5 mm | 4 | |
| 14 Sept. | Patchy rain possible | 18° /13° | 2.6 mm | 0.9 | |
| 15 Sept. |  Moderate rain | 18° /15° | 7.1 mm | 1 | |
| 16 Sept. | Moderate rain | 17° /15° | 5.3 mm | 0.4 | |
| 17 Sept. | Moderate rain | 16° /14° | 9.7 mm | 0.5 | |
| 18 Sept. | Patchy rain possible | 20° /18° | 4 mm | 0.4 | |
| 19 Sept. | Patchy rain possible | 22° /18° | 0.2 mm | 4 | |
| 20 Sept. | Patchy rain possible | 25° /18° | 0.2 mm | 4 | |
| 21 Sept. | Patchy rain possible | 19° /16° | 1.5 mm | 4 | |
| 22 Sept. | Patchy rain possible | 19° /15° | 0.2 mm | 4 | |
| 23 Sept. | Sunny | 19° /14° | 0 mm | 5 | |
| 24 Sept. | Sunny | 20° /12° | 0 mm | 5 | |
| 25 Sept. |  Partly cloudy | 20° /12° | 0 mm | 5 | |
| 26 Sept. | Patchy rain possible | 18° /13° | 0.3 mm | 4 | |
| 27 Sept. | Partly cloudy | 19° /13° | 0 mm | 5 | |
| 28 Sept. | Patchy rain possible | 16° /13° | 2 mm | 4 | |
| 29 Sept. | Light rain shower | 17° /12° | 0.3 mm | 4 | |
| 30 Sept. |  Cloudy | 16° /11° | 7.4 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Leiden 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 Leiden forecast closer to your planned date for the most up-to-date weather information.
Change Month
Leiden in September - FAQ
What are the expected maximum and minimum temperatures in Leiden during September?
During September, expect a variety of temperatures with highs around 20° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Leiden during September?
Significant rainfall exceeding 111 mm is expected in Leiden during September, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Leiden during September?
The average wind speed in Leiden during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Leiden
Explore the daily rainfall trends and prepare for Leidens September weather 💧
UV exposure in Leiden during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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