Climate averages 1991–2020
Aveiro weather
in May.
A mild, moderately wet month: the 5th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Aveiro: daytime highs average 21.2°C and nights cool to about 12.7°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 79 mm of rain on roughly 10 days, which makes May a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 25 min on an average May day.
The nearest other city in this atlas is Coimbra (52 km away). In May its highs average 22.0°C, 0.8°C warmer than Aveiro, with 73 mm of rain.
Among the 12 cities listed in Portugal, Aveiro ranks 4th of 12 for the warmest May highs and 9th of 12 for the driest May (rainfall, lowest first). The mean May high of those 12 cities is 20.6°C; Aveiro is 0.6°C warmer than that mean.
From May to June, average highs rise by 3.2°C to 24.5°C, and monthly rainfall falls from 79 mm to 26 mm.
The annual picture
May 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
Aveiro climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 13.5°C6.5°C | 6.5°C | 128 | 12.1 | 9.610 h |
| February | 14.7°C6.8°C | 6.8°C | 88 | 9.4 | 10.611 h |
| March | 17.3°C8.6°C | 8.6°C | 95 | 9.9 | 11.912 h |
| April | 18.5°C10.1°C | 10.1°C | 98 | 10.9 | 13.313 h |
| May, selected | 21.2°C12.7°C | 12.7°C | 79 | 9.6 | 14.414 h |
| June | 24.5°C15.3°C | 15.3°C | 26 | 5.0 | 15.015 h |
| July | 26.8°C16.8°C | 16.8°C | 12 | 2.7 | 14.815 h |
| August | 27.3°C17.2°C | 17.2°C | 17 | 3.4 | 13.814 h |
| September | 25.1°C15.8°C | 15.8°C | 51 | 6.0 | 12.513 h |
| October | 21.0°C13.4°C | 13.4°C | 143 | 12.0 | 11.211 h |
| November | 16.4°C9.8°C | 9.8°C | 145 | 12.7 | 10.010 h |
| December | 14.3°C7.6°C | 7.6°C | 141 | 12.2 | 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
May in nearby cities
- Coimbra in MayPortugal · 52 kmHigh 22.0°C · Low 11.5°C · 73 mm rain
- Porto in MayPortugal · 56 kmHigh 20.1°C · Low 12.3°C · 101 mm rain
- Viseu in MayPortugal · 62 kmHigh 20.0°C · Low 9.9°C · 98 mm rain
- Leiria in MayPortugal · 101 kmHigh 21.4°C · Low 12.7°C · 63 mm rain
- Braga in MayPortugal · 102 kmHigh 19.9°C · Low 10.2°C · 121 mm rain
- Vigo in MaySpain · 177 kmHigh 18.6°C · Low 11.4°C · 118 mm rain
- Pontevedra in MaySpain · 199 kmHigh 19.7°C · Low 11.4°C · 114 mm rain
- Ourense in MaySpain · 199 kmHigh 20.3°C · Low 10.1°C · 72 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 Aveiro) is explained once on the Aveiro year overview and on the Sources, method and limits page.