Climate averages 1991–2020
Belfast 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 Belfast: daytime highs average 10.9°C and nights cool to about 5.9°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 65 mm of rain on roughly 13 days, which makes April a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 02 min on an average April day.
The nearest other city in this atlas is Lisburn (11 km away). In April its highs average 11.0°C, about as warm as Belfast, with 65 mm of rain.
Among the 143 cities listed in the United Kingdom, Belfast ranks joint 131st of 143 for the warmest April highs and joint 117th of 143 for the driest April (rainfall, lowest first). The mean April high of those 143 cities is 12.2°C; Belfast is 1.2°C cooler than that mean.
From April to May, average highs rise by 2.6°C to 13.6°C, and monthly rainfall rises from 65 mm to 70 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
Belfast climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.5°C3.9°C | 3.9°C | 77 | 14.2 | 7.98 h |
| February | 7.7°C3.8°C | 3.8°C | 63 | 12.2 | 9.710 h |
| March | 9.1°C4.4°C | 4.4°C | 62 | 13.4 | 11.812 h |
| April, selected | 10.9°C5.9°C | 5.9°C | 65 | 13.0 | 14.014 h |
| May | 13.6°C8.2°C | 8.2°C | 70 | 14.1 | 16.016 h |
| June | 15.9°C10.9°C | 10.9°C | 75 | 13.2 | 17.217 h |
| July | 17.4°C12.5°C | 12.5°C | 81 | 14.6 | 16.717 h |
| August | 17.3°C12.6°C | 12.6°C | 81 | 14.2 | 14.915 h |
| September | 15.7°C11.3°C | 11.3°C | 70 | 12.5 | 12.813 h |
| October | 12.8°C9.0°C | 9.0°C | 86 | 13.5 | 10.611 h |
| November | 9.8°C6.4°C | 6.4°C | 85 | 14.0 | 8.59 h |
| December | 7.9°C4.4°C | 4.4°C | 82 | 13.5 | 7.47 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
- Lisburn in AprilUnited Kingdom · 11 kmHigh 11.0°C · Low 5.3°C · 65 mm rain
- Derry in AprilUnited Kingdom · 99 kmHigh 11.1°C · Low 5.1°C · 74 mm rain
- Douglas in AprilIsle of Man · 106 kmHigh 9.4°C · Low 7.1°C · 59 mm rain
- Dublin in AprilIreland · 142 kmHigh 11.9°C · Low 5.6°C · 66 mm rain
- Tallaght in AprilIreland · 149 kmHigh 11.6°C · Low 5.2°C · 66 mm rain
- Paisley in AprilUnited Kingdom · 167 kmHigh 10.8°C · Low 3.9°C · 77 mm rain
- East Kilbride in AprilUnited Kingdom · 171 kmHigh 10.1°C · Low 3.0°C · 74 mm rain
- Glasgow in AprilUnited Kingdom · 176 kmHigh 10.7°C · Low 3.6°C · 74 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 Belfast) is explained once on the Belfast year overview and on the Sources, method and limits page.
Lisburn lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.