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Ulldecona climate by month
What the weather is like
Ulldecona has a hot-summer Mediterranean climate (Köppen Csa): dry, sunny summers and mild, wetter winters.
The warmest month is July, when afternoons average 31° and nights 20°. January is the coolest month, with highs of 15° and lows of 5°. The difference between the warmest and the coolest month is about 15°.
About 613 mm of precipitation falls in an average year. September is the wettest month (66 mm, 8 wet days) and July the driest (18 mm, 4 wet days). Cloud cover ranges from 12% in July to 31% in May.
The sea reaches about 26° 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, Ulldecona is 2.8° cooler on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 31° · July
- Coldest nights
- 5° · January
- Wettest month
- September
- Driest month
- July
- Clearest skies
- July · 12% cloud
- Warmest sea
- 26° · August
- Longest day
- 15 h 04 min
- Shortest day
- 9 h 17 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 | 15° | 16° | 18° | 20° | 24° | 28° | 31° | 31° | 28° | 24° | 19° | 16° |
| Average low | 5° | 5° | 7° | 9° | 13° | 17° | 20° | 20° | 17° | 13° | 8° | 6° |
| Precipitation | 46 mm | 40 mm | 39 mm | 64 mm | 62 mm | 35 mm | 18 mm | 34 mm | 66 mm | 90 mm | 68 mm | 51 mm |
| Wet days (≥1 mm) | 4.7 | 4.2 | 6 | 7.2 | 6.7 | 4.2 | 3.9 | 5.5 | 8.1 | 7.4 | 5.5 | 4.6 |
| Cloud cover | 28% | 28% | 27% | 30% | 31% | 20% | 12% | 18% | 25% | 30% | 31% | 30% |
| Sea temperature | 14° | 13° | 14° | 15° | 18° | 22° | 25° | 26° | 25° | 22° | 18° | 15° |
| Daylight | 9h 35 | 10h 40 | 11h 54 | 13h 16 | 14h 26 | 15h 04 | 14h 48 | 13h 49 | 12h 30 | 11h 10 | 9h 57 | 9h 17 |
| Saharan dust haze | – | – | – | ● | – | – | ● | ● | – | – | – | – |
| Month score | 73 | 79 | 86 | 83 | 84 | 78 | 66 | 63 | 70 | 83 | 87 | 77 |
Dust haze, monthly average 2015–2024: ● occasional, ●● frequent, ●●● very frequent