Climate averages 1991–2020
Porto weather
in April.
A mild, wet month: the 7th warmest and the joint 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Porto: daytime highs average 17.5°C and nights cool to about 9.7°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 121 mm of rain on roughly 12 days, which makes April a wet month (the joint 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 17 min on an average April day.
The nearest other city in this atlas is Braga (47 km away). In April its highs average 17.1°C, about as warm as Porto, with 142 mm of rain.
Among the 12 cities listed in Portugal, Porto ranks 9th of 12 for the warmest April highs and 11th of 12 for the driest April (rainfall, lowest first). The mean April high of those 12 cities is 18.0°C; Porto is 0.5°C cooler than that mean.
From April to May, average highs rise by 2.6°C to 20.1°C, and monthly rainfall falls from 121 mm to 101 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
Porto climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 12.8°C6.3°C | 6.3°C | 150 | 12.2 | 9.610 h |
| February | 13.9°C6.3°C | 6.3°C | 103 | 9.6 | 10.611 h |
| March | 16.3°C8.1°C | 8.1°C | 121 | 10.2 | 11.912 h |
| April, selected | 17.5°C9.7°C | 9.7°C | 121 | 11.8 | 13.313 h |
| May | 20.1°C12.3°C | 12.3°C | 101 | 11.1 | 14.514 h |
| June | 23.2°C15.0°C | 15.0°C | 40 | 6.3 | 15.115 h |
| July | 25.6°C16.7°C | 16.7°C | 23 | 4.0 | 14.815 h |
| August | 26.2°C17.2°C | 17.2°C | 29 | 4.5 | 13.814 h |
| September | 24.1°C15.7°C | 15.7°C | 64 | 6.6 | 12.513 h |
| October | 20.1°C13.1°C | 13.1°C | 166 | 12.7 | 11.111 h |
| November | 15.7°C9.6°C | 9.6°C | 163 | 12.9 | 9.910 h |
| December | 13.5°C7.4°C | 7.4°C | 167 | 12.4 | 9.39 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
- Braga in AprilPortugal · 47 kmHigh 17.1°C · Low 7.5°C · 142 mm rain
- Aveiro in AprilPortugal · 56 kmHigh 18.5°C · Low 10.1°C · 98 mm rain
- Viseu in AprilPortugal · 80 kmHigh 16.6°C · Low 7.1°C · 118 mm rain
- Coimbra in AprilPortugal · 106 kmHigh 19.0°C · Low 8.9°C · 92 mm rain
- Vigo in AprilSpain · 121 kmHigh 16.2°C · Low 9.1°C · 152 mm rain
- Pontevedra in AprilSpain · 143 kmHigh 17.2°C · Low 9.0°C · 137 mm rain
- Ourense in AprilSpain · 146 kmHigh 17.3°C · Low 7.3°C · 84 mm rain
- Leiria in AprilPortugal · 157 kmHigh 18.7°C · Low 10.4°C · 73 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 Porto) is explained once on the Porto year overview and on the Sources, method and limits page.