Climate averages 1991–2020
Santiago de Compostela weather
in August.
A warm, moderately wet month: the warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Santiago de Compostela: daytime highs average 23.6°C and nights cool to about 14.2°C. By daytime temperature it is the warmest month of the year.
Expect about 44 mm of rain on roughly 7 days, which makes August a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 56 min on an average August day.
The nearest other city in this atlas is Pontevedra (51 km away). In August its highs average 25.4°C, 1.9°C warmer than Santiago de Compostela, with 48 mm of rain.
Among the 93 cities listed in Spain, Santiago de Compostela ranks 85th of 93 for the warmest August highs and joint 77th of 93 for the driest August (rainfall, lowest first). The mean August high of those 93 cities is 29.3°C; Santiago de Compostela is 5.7°C cooler than that mean.
From August to September, average highs fall by 1.9°C to 21.7°C, and monthly rainfall rises from 44 mm to 69 mm.
The annual picture
August 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 | 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, selected | 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
August in nearby cities
- Pontevedra in AugustSpain · 51 kmHigh 25.4°C · Low 16.4°C · 48 mm rain
- A Coruña in AugustSpain · 56 kmHigh 22.8°C · Low 16.5°C · 46 mm rain
- Vigo in AugustSpain · 73 kmHigh 23.9°C · Low 16.1°C · 49 mm rain
- Lugo in AugustSpain · 82 kmHigh 23.5°C · Low 13.6°C · 35 mm rain
- Ourense in AugustSpain · 82 kmHigh 27.1°C · Low 15.4°C · 27 mm rain
- Braga in AugustPortugal · 148 kmHigh 26.4°C · Low 15.4°C · 39 mm rain
- Porto in AugustPortugal · 193 kmHigh 26.2°C · Low 17.2°C · 29 mm rain
- Avilés in AugustSpain · 225 kmHigh 21.6°C · Low 16.8°C · 75 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.