Climate averages 1991–2020
Watford weather
in August.
A mild, moderately wet month: the 2nd warmest and one of the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Watford: daytime highs average 20.8°C and nights cool to about 13.3°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 62 mm of rain on roughly 11 days, which makes August a moderately wet month (one of the wettest months of the year). Daylight, from sunrise to sunset, lasts about 14 h 38 min on an average August day.
The nearest other city in this atlas is Harrow (10 km away). In August its highs average 20.8°C, about as warm as Watford, with 61 mm of rain.
Among the 143 cities listed in the United Kingdom, Watford ranks joint 28th of 143 for the warmest August highs and joint 30th of 143 for the driest August (rainfall, lowest first). The mean August high of those 143 cities is 19.7°C; Watford is 1.1°C warmer than that mean.
From August to September, average highs fall by 2.7°C to 18.1°C, and monthly rainfall falls from 62 mm to 51 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
Watford climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.1°C2.3°C | 2.3°C | 54 | 11.2 | 8.48 h |
| February | 7.6°C2.2°C | 2.2°C | 45 | 9.9 | 9.910 h |
| March | 10.0°C3.4°C | 3.4°C | 44 | 10.3 | 11.812 h |
| April | 12.9°C5.1°C | 5.1°C | 50 | 11.4 | 13.814 h |
| May | 16.0°C8.1°C | 8.1°C | 56 | 10.5 | 15.616 h |
| June | 18.9°C11.1°C | 11.1°C | 58 | 10.5 | 16.617 h |
| July | 21.1°C13.3°C | 13.3°C | 58 | 11.2 | 16.216 h |
| August, selected | 20.8°C13.3°C | 13.3°C | 62 | 10.7 | 14.615 h |
| September | 18.1°C11.1°C | 11.1°C | 51 | 9.4 | 12.713 h |
| October | 14.2°C8.4°C | 8.4°C | 60 | 11.3 | 10.711 h |
| November | 10.0°C5.1°C | 5.1°C | 62 | 11.2 | 8.99 h |
| December | 7.4°C2.9°C | 2.9°C | 57 | 11.2 | 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
- Harrow in AugustUnited Kingdom · 10 kmHigh 20.8°C · Low 13.3°C · 61 mm rain
- St Albans in AugustUnited Kingdom · 11 kmHigh 20.7°C · Low 13.1°C · 62 mm rain
- Hemel Hempstead in AugustUnited Kingdom · 12 kmHigh 20.4°C · Low 12.8°C · 62 mm rain
- Uxbridge in AugustUnited Kingdom · 13 kmHigh 20.8°C · Low 13.3°C · 60 mm rain
- Hayes in AugustUnited Kingdom · 16 kmHigh 20.9°C · Low 13.4°C · 60 mm rain
- Archway in AugustUnited Kingdom · 21 kmHigh 21.0°C · Low 13.4°C · 61 mm rain
- Slough in AugustUnited Kingdom · 21 kmHigh 21.0°C · Low 13.2°C · 60 mm rain
- Enfield Town in AugustUnited Kingdom · 21 kmHigh 21.2°C · Low 13.5°C · 63 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 Watford) is explained once on the Watford year overview and on the Sources, method and limits page.
Hemel Hempstead lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.