Climate averages 1991–2020
Slough weather
in August.
A mild, moderately wet month: the 2nd warmest and the joint 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Slough: daytime highs average 21.0°C and nights cool to about 13.2°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 60 mm of rain on roughly 10 days, which makes August a moderately wet month (the joint 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 37 min on an average August day.
The nearest other city in this atlas is Maidenhead (9 km away). In August its highs average 21.0°C, about as warm as Slough, with 60 mm of rain.
Among the 143 cities listed in the United Kingdom, Slough ranks joint 19th of 143 for the warmest August highs and joint 8th of 143 for the driest August (rainfall, lowest first). The mean August high of those 143 cities is 19.7°C; Slough is 1.3°C warmer than that mean.
From August to September, average highs fall by 2.7°C to 18.3°C, and monthly rainfall falls from 60 mm to 47 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Slough climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.3°C2.3°C | 2.3°C | 55 | 10.9 | 8.48 h |
| February | 7.8°C2.1°C | 2.1°C | 45 | 9.2 | 9.910 h |
| March | 10.3°C3.3°C | 3.3°C | 43 | 10.1 | 11.812 h |
| April | 13.2°C5.1°C | 5.1°C | 49 | 11.2 | 13.814 h |
| May | 16.3°C8.2°C | 8.2°C | 52 | 9.8 | 15.616 h |
| June | 19.2°C11.1°C | 11.1°C | 55 | 9.8 | 16.517 h |
| July | 21.4°C13.3°C | 13.3°C | 53 | 10.6 | 16.116 h |
| August, selected | 21.0°C13.2°C | 13.2°C | 60 | 10.3 | 14.615 h |
| September | 18.3°C11.0°C | 11.0°C | 47 | 8.9 | 12.713 h |
| October | 14.4°C8.4°C | 8.4°C | 60 | 11.2 | 10.711 h |
| November | 10.2°C5.0°C | 5.0°C | 64 | 11.0 | 8.99 h |
| December | 7.5°C2.9°C | 2.9°C | 58 | 11.0 | 7.98 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Maidenhead in AugustUnited Kingdom · 9 kmHigh 21.0°C · Low 13.2°C · 60 mm rain
- Uxbridge in AugustUnited Kingdom · 9 kmHigh 20.8°C · Low 13.3°C · 60 mm rain
- Hayes in AugustUnited Kingdom · 12 kmHigh 20.9°C · Low 13.4°C · 60 mm rain
- Bracknell in AugustUnited Kingdom · 15 kmHigh 20.8°C · Low 12.8°C · 60 mm rain
- High Wycombe in AugustUnited Kingdom · 17 kmHigh 20.8°C · Low 13.0°C · 62 mm rain
- Harrow in AugustUnited Kingdom · 20 kmHigh 20.8°C · Low 13.3°C · 61 mm rain
- Watford in AugustUnited Kingdom · 21 kmHigh 20.8°C · Low 13.3°C · 62 mm rain
- Woking in AugustUnited Kingdom · 21 kmHigh 21.1°C · Low 13.1°C · 64 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Slough) is explained once on the Slough year overview and on the Sources, method and limits page.
Hayes and Uxbridge lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.