Climate averages 1991–2020
Santiago de Compostela weather
in May.
A mild, wet month: the joint 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 Santiago de Compostela: daytime highs average 17.8°C and nights cool to about 9.1°C. By daytime temperature it is the joint 5th warmest of the 12 months.
Expect about 92 mm of rain on roughly 13 days, which makes May a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 37 min on an average May day.
The nearest other city in this atlas is Pontevedra (51 km away). In May its highs average 19.7°C, 1.9°C warmer than Santiago de Compostela, with 114 mm of rain.
Among the 93 cities listed in Spain, Santiago de Compostela ranks joint 86th of 93 for the warmest May highs and 87th of 93 for the driest May (rainfall, lowest first). The mean May high of those 93 cities is 21.8°C; Santiago de Compostela is 4.0°C cooler than that mean.
From May to June, average highs rise by 3.0°C to 20.8°C, and monthly rainfall falls from 92 mm to 54 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
Santiago de Compostela climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 10.8°C4.0°C | 4.0°C | 141 | 13.9 | 9.49 h |
| February | 11.7°C3.8°C | 3.8°C | 101 | 11.7 | 10.511 h |
| March | 14.0°C5.3°C | 5.3°C | 106 | 12.1 | 11.912 h |
| April | 15.3°C6.6°C | 6.6°C | 115 | 14.4 | 13.413 h |
| May, selected | 17.8°C9.1°C | 9.1°C | 92 | 13.0 | 14.615 h |
| June | 20.8°C11.7°C | 11.7°C | 54 | 8.7 | 15.315 h |
| July | 23.1°C13.7°C | 13.7°C | 30 | 5.9 | 15.015 h |
| August | 23.6°C14.2°C | 14.2°C | 44 | 7.2 | 13.914 h |
| September | 21.7°C12.6°C | 12.6°C | 69 | 9.1 | 12.513 h |
| October | 17.8°C10.2°C | 10.2°C | 140 | 13.5 | 11.111 h |
| November | 13.4°C7.0°C | 7.0°C | 151 | 15.3 | 9.810 h |
| December | 11.5°C4.9°C | 4.9°C | 142 | 13.8 | 9.19 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
- Pontevedra in MaySpain · 51 kmHigh 19.7°C · Low 11.4°C · 114 mm rain
- A Coruña in MaySpain · 56 kmHigh 17.8°C · Low 11.5°C · 83 mm rain
- Vigo in MaySpain · 73 kmHigh 18.6°C · Low 11.4°C · 118 mm rain
- Lugo in MaySpain · 82 kmHigh 17.2°C · Low 8.3°C · 74 mm rain
- Ourense in MaySpain · 82 kmHigh 20.3°C · Low 10.1°C · 72 mm rain
- Braga in MayPortugal · 148 kmHigh 19.9°C · Low 10.2°C · 121 mm rain
- Porto in MayPortugal · 193 kmHigh 20.1°C · Low 12.3°C · 101 mm rain
- Avilés in MaySpain · 225 kmHigh 16.3°C · Low 11.4°C · 114 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 Santiago de Compostela) is explained once on the Santiago de Compostela year overview and on the Sources, method and limits page.