Ilo climate by month
What the weather is like
Ilo has a cold desert climate (Köppen BWk): very little rain and intense sun.
The warmest month is February, when afternoons average 24° and nights 21°. August is the coolest month, with highs of 16° and lows of 12°. The difference between the warmest and the coolest month is about 8°, a small seasonal swing typical of places tempered by the sea.
About 19 mm of precipitation falls in an average year. February is the wettest month (2 mm, 3 wet days) and April the driest (1 mm, 0 wet days). Cloud cover ranges from 31% in May to 53% in January.
The sea reaches about 22° in February. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Lima, the capital, Ilo is 1.3° cooler on a February afternoon and receives less precipitation over the year.
Year in figures
- Hottest afternoons
- 24° · February
- Coldest nights
- 12° · August
- Wettest month
- February
- Driest month
- April
- Clearest skies
- May · 31% cloud
- Warmest sea
- 22° · February
- Longest day
- 13 h 11 min
- Shortest day
- 11 h 05 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 | 23° | 24° | 23° | 21° | 19° | 17° | 16° | 16° | 16° | 17° | 19° | 21° |
| Average low | 20° | 21° | 20° | 18° | 16° | 14° | 13° | 12° | 13° | 14° | 16° | 18° |
| Precipitation | 2 mm | 2 mm | 1 mm | 1 mm | 1 mm | 2 mm | 2 mm | 3 mm | 2 mm | 1 mm | 1 mm | 1 mm |
| Wet days (≥1 mm) | 1.3 | 2.8 | 1 | 0 | 0 | 1 | 0.3 | 0.2 | 1.5 | 0 | 0 | 0.7 |
| Cloud cover | 53% | 51% | 46% | 36% | 31% | 33% | 34% | 32% | 31% | 37% | 43% | 49% |
| Sea temperature | 22° | 22° | 22° | 21° | 19° | 19° | 18° | 17° | 17° | 18° | 20° | 21° |
| Daylight | 13h 04 | 12h 40 | 12h 12 | 11h 42 | 11h 18 | 11h 05 | 11h 10 | 11h 31 | 11h 59 | 12h 29 | 12h 56 | 13h 11 |
| Month score | 87 | 85 | 91 | 98 | 100 | 91 | 87 | 87 | 87 | 93 | 95 | 90 |