
Wraysbury Reservoir
- Annual mean
- 10.1 °C
- Warmest month
- July
- Wettest month
- November
Twelve month average temperature, precipitation, and wind patterns for the region.
Detailed analysis of climate variables at Summer Leys, based on representative coordinate data from 1991 to 2020. This profile documents the annual rhythm of temperature ranges, average daily precipitation, relative humidity, wind speeds, and daylight duration. The records distinguish long term climatic averages from variable weather conditions, providing a steady baseline for regional environmental study.

Long term monthly thermal range and average daily precipitation tracking across twelve months
Compare average temperature bounds, daily precipitation rates, wind speeds, and calculated daylight across the calendar year.
| Mean temperature | Precipitation | Humidity | Wind speed | Daylight | |
|---|---|---|---|---|---|
| January | 3.5 °C-4° to 11.3° | 1.9 mm/day | 93.7% | 5.8 m/s | 8.1 hours |
| February | 3.9 °C-3.8° to 12.6° | 1.7 mm/day | 90.4% | 5.8 m/s | 9.6 hours |
| March | 5.9 °C-2.5° to 15.9° | 1.5 mm/day | 85.6% | 5.4 m/s | 11.6 hours |
| April | 8.4 °C-1.1° to 19.6° | 1.7 mm/day | 82% | 4.8 m/s | 13.7 hours |
| May | 11.6 °C1.3° to 22.8° | 1.8 mm/day | 79.5% | 4.7 m/s | 15.5 hours |
| June | 14.7 °C5.5° to 25.4° | 2.2 mm/day | 79.6% | 4.3 m/s | 16.5 hours |
| July | 16.8 °C8° to 27.2° | 2 mm/day | 78.7% | 4.3 m/s | 16 hours |
| August | 16.5 °C7.6° to 27° | 2.2 mm/day | 79.5% | 4.4 m/s | 14.4 hours |
| September | 13.8 °C5.4° to 23.7° | 1.9 mm/day | 82.8% | 4.7 m/s | 12.4 hours |
| October | 10.2 °C1.7° to 19.7° | 2.3 mm/day | 87.9% | 5.3 m/s | 10.3 hours |
| November | 6.5 °C-1.4° to 15.1° | 2.3 mm/day | 93.3% | 5.3 m/s | 8.5 hours |
| December | 4.1 °C-3.3° to 11.9° | 2.1 mm/day | 94.9% | 5.5 m/s | 7.5 hours |
See two months side by side and how much they differ. Both use the same 1991–2020 climate normals and NASA POWER data point as the table above, so they show typical conditions, not a forecast.
Analysis of twelve monthly normals across temperature, precipitation, humidity, wind, and daylight duration.
Interactive climate map
Open the climate map to compare monthly temperature, precipitation, and other averages.
Explore monthly temperature, precipitation, humidity, wind, and daylight rhythms across diverse geographic settings.





Deepen your understanding of Summer Leys through a detailed look at its wetland structure and regional significance in the Upper Nene Valley. The MoriAtlas dataset provides an essential geographic perspective on this Northamptonshire nature reserve, illustrating its transformation from industrial gravel pits into a managed ecological landscape for wetland conservation.