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Leiden Weather by Month
Average temperatures, rainfall and humidity for Leiden, Netherlands, month by month, built from OpenWeather’s historical records. Use it to see what a typical Leiden month looks like before you travel — then check the live Leiden forecast for the days ahead.
Warmest month
August
23°C average high
Coolest month
January
3°C average low
Wettest month
October
80 mm of rain
Driest month
April
42 mm of rain
Average temperature and rainfall in Leiden by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 7°C | 3°C | -8°C / 14°C | 71 mm | 88% | 15 km/h |
| February | 8°C | 3°C | -8°C / 18°C | 51 mm | 84% | 16 km/h |
| March | 10°C | 4°C | -7°C / 24°C | 43 mm | 79% | 15 km/h |
| April | 14°C | 6°C | -3°C / 25°C | 42 mm | 75% | 13 km/h |
| May | 17°C | 10°C | 2°C / 31°C | 46 mm | 77% | 12 km/h |
| June | 21°C | 13°C | 8°C / 36°C | 64 mm | 76% | 11 km/h |
| July | 23°C | 15°C | 10°C / 38°C | 76 mm | 76% | 11 km/h |
| August | 23°C | 15°C | 8°C / 34°C | 67 mm | 77% | 11 km/h |
| September | 20°C | 13°C | 6°C / 32°C | 70 mm | 81% | 11 km/h |
| October | 15°C | 10°C | 1°C / 24°C | 80 mm | 86% | 13 km/h |
| November | 10°C | 6°C | -5°C / 19°C | 68 mm | 87% | 14 km/h |
| December | 8°C | 4°C | -6°C / 15°C | 74 mm | 88% | 15 km/h |
Best time to visit Leiden
The most comfortable time to visit Leiden is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around October, totalling about 753 mm a year.
Travellers who prefer heat should aim for August, when highs average 23°C. October is the month to avoid if rain would spoil your plans — it averages 80 mm, roughly 2× the rainfall of the driest month (April).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Leiden forecast for what is happening now.