Climate averages 1991–2020
Watford weather
in April.
A cool, moderately wet month: the 7th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a cool month in Watford: daytime highs average 12.9°C and nights cool to about 5.1°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 50 mm of rain on roughly 11 days, which makes April a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 50 min on an average April day.
The nearest other city in this atlas is Harrow (10 km away). In April its highs average 13.0°C, about as warm as Watford, with 49 mm of rain.
Among the 143 cities listed in the United Kingdom, Watford ranks joint 29th of 143 for the warmest April highs and joint 34th of 143 for the driest April (rainfall, lowest first). The mean April high of those 143 cities is 12.2°C; Watford is 0.7°C warmer than that mean.
From April to May, average highs rise by 3.1°C to 16.0°C, and monthly rainfall rises from 50 mm to 56 mm.
The annual picture
April 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, selected | 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 | 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
April in nearby cities
- Harrow in AprilUnited Kingdom · 10 kmHigh 13.0°C · Low 5.1°C · 49 mm rain
- St Albans in AprilUnited Kingdom · 11 kmHigh 12.7°C · Low 4.9°C · 50 mm rain
- Hemel Hempstead in AprilUnited Kingdom · 12 kmHigh 12.5°C · Low 4.6°C · 50 mm rain
- Uxbridge in AprilUnited Kingdom · 13 kmHigh 13.1°C · Low 5.2°C · 49 mm rain
- Hayes in AprilUnited Kingdom · 16 kmHigh 13.1°C · Low 5.2°C · 49 mm rain
- Archway in AprilUnited Kingdom · 21 kmHigh 13.1°C · Low 5.1°C · 49 mm rain
- Slough in AprilUnited Kingdom · 21 kmHigh 13.2°C · Low 5.1°C · 49 mm rain
- Enfield Town in AprilUnited Kingdom · 21 kmHigh 13.2°C · Low 5.2°C · 50 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.