Irun climate by month
What the weather is like
Irun has an oceanic climate (Köppen Cfb): rain spread through the year and no real dry season.
The warmest month is August, when afternoons average 25° and nights 17°. January is the coolest month, with highs of 13° and lows of 6°. The difference between the warmest and the coolest month is about 12°.
About 1,977 mm of precipitation falls in an average year. January is the wettest month (206 mm, 16 wet days) and July the driest (98 mm, 9 wet days). Cloud cover ranges from 33% in August to 46% in December.
The sea reaches about 22° in August. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Madrid, the capital, Irun is 7.6° cooler on a August afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 25° · August
- Coldest nights
- 6° · February
- Wettest month
- January
- Driest month
- July
- Clearest skies
- August · 33% cloud
- Warmest sea
- 22° · August
- Longest day
- 15 h 23 min
- Shortest day
- 8 h 59 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 13° | 13° | 16° | 18° | 20° | 23° | 24° | 25° | 23° | 21° | 16° | 14° |
| Average low | 6° | 6° | 7° | 9° | 12° | 15° | 17° | 17° | 15° | 13° | 9° | 7° |
| Precipitation | 206 mm | 162 mm | 162 mm | 188 mm | 157 mm | 108 mm | 98 mm | 130 mm | 138 mm | 190 mm | 224 mm | 214 mm |
| Wet days (≥1 mm) | 15.8 | 12.8 | 14 | 14.2 | 14.3 | 10.8 | 9.3 | 9.8 | 10.2 | 11.9 | 15.3 | 13.2 |
| Cloud cover | 45% | 43% | 41% | 42% | 41% | 38% | 34% | 33% | 33% | 39% | 44% | 46% |
| Sea temperature | 13° | 12° | 13° | 14° | 16° | 19° | 21° | 22° | 21° | 18° | 16° | 14° |
| Daylight | 9h 19 | 10h 31 | 11h 53 | 13h 24 | 14h 40 | 15h 23 | 15h 06 | 13h 59 | 12h 33 | 11h 05 | 9h 43 | 8h 59 |
| Month score | 33 | 39 | 51 | 59 | 62 | 71 | 76 | 74 | 75 | 68 | 50 | 39 |