Climate averages 1991–2020
Porto weather
in March.
A mild, wet month: the 8th warmest and the joint 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a mild month in Porto: daytime highs average 16.3°C and nights cool to about 8.1°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 121 mm of rain on roughly 10 days, which makes March a wet month (the joint 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 55 min on an average March day.
The nearest other city in this atlas is Braga (47 km away). In March its highs average 15.7°C, 0.6°C cooler than Porto, with 147 mm of rain.
Among the 12 cities listed in Portugal, Porto ranks 9th of 12 for the warmest March highs and 11th of 12 for the driest March (rainfall, lowest first). The mean March high of those 12 cities is 16.7°C; Porto is 0.5°C cooler than that mean.
From March to April, average highs rise by 1.3°C to 17.5°C, and monthly rainfall stays at 121 mm.
The annual picture
March 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, selected | 16.3°C8.1°C | 8.1°C | 121 | 10.2 | 11.912 h |
| April | 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
March in nearby cities
- Braga in MarchPortugal · 47 kmHigh 15.7°C · Low 5.8°C · 147 mm rain
- Aveiro in MarchPortugal · 56 kmHigh 17.3°C · Low 8.6°C · 95 mm rain
- Viseu in MarchPortugal · 80 kmHigh 15.0°C · Low 5.4°C · 115 mm rain
- Coimbra in MarchPortugal · 106 kmHigh 17.6°C · Low 7.3°C · 85 mm rain
- Vigo in MarchSpain · 121 kmHigh 15.2°C · Low 7.8°C · 158 mm rain
- Pontevedra in MarchSpain · 143 kmHigh 16.0°C · Low 7.6°C · 141 mm rain
- Ourense in MarchSpain · 146 kmHigh 15.8°C · Low 5.6°C · 84 mm rain
- Leiria in MarchPortugal · 157 kmHigh 17.6°C · Low 9.1°C · 70 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.