Ilo in Spring
In spring (September, October and November), Ilo sees average daytime highs around 18°C and overnight lows near 15°C, with 1 mm of rain over about 0 wet days across the season. It is the 3rd-warmest season and the driest season of the year.
Over the season highs climb from about 17°C in early September to 20°C by late November. The sky is clear or mostly clear about 44% of the time across spring, and the air most often feels comfortable.
Spring is Ilo's 3rd-best season to visit on our travel score. Ilo has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Ilo's year-round climate.
- Avg daytime high
- 18°C
- 3rd-warmest season
- Avg overnight low
- 15°C
- Rainfall
- 1 mm
- 0 wet days
- Avg wind
- 12 km/h
- Travel score
- 7.3
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Ilo in Spring
Over the season highs climb from about 17°C in early September to 20°C by late November.
A typical spring day in Ilo reaches about 18°C and drops to 15°C overnight. The warmest of the three months is November, the coolest September.
Ilo weather by month
How the three spring months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 22° / 20° | 4 | 0.9 | 12.9 | 7.8 |
| Feb | 23° / 20° | 4 | 1.2 | 12.6 | 7.9 |
| Mar | 22° / 19° | 1 | 0.4 | 12.1 | 8.1 |
| Apr | 21° / 18° | 0 | 0.1 | 11.6 | 8.1 |
| May | 19° / 16° | 0 | 0.1 | 11.2 | 7.9 |
| Jun | 18° / 15° | 0 | 0.1 | 11 | 7.3 |
| Jul | 17° / 14° | 1 | 0.4 | 11.1 | 6.7 |
| Aug | 17° / 13° | 1 | 0.1 | 11.4 | 6.7 |
| Sep | 17° / 14° | 0 | 0.1 | 11.9 | 6.9 |
| Oct | 18° / 15° | 0 | 0 | 12.4 | 7.3 |
| Nov | 19° / 16° | 0 | 0.1 | 12.8 | 7.6 |
| Dec | 21° / 18° | 1 | 0.2 | 13 | 7.7 |
Cloud cover in Spring
The sky is clear or mostly clear about 44% of the time across spring.
Chance of precipitation in Spring
Ilo gets around 1 mm of rain over 0 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 12 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 42 min in early September to 13 hours by late November. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 6.7 kWh/m².
Is spring a good time to visit Ilo?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is one of the better times to visit Ilo for general sightseeing.
What to pack for Ilo in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Ilo sees daytime highs around 18°C and nights near 15°C. Pack sun protection. Worth having: a warm layer.
Sea temperature near Ilo in Spring
The nearest coast averages about 18°C across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in February at about 22°C and coldest in August near 17°C.
It's comfortable for a long swim from Nov 27 to Apr 28 — about 5 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 22 | 22 | 22 | 21 | 19 | 19 | 18 | 17 | 17 | 18 | 20 | 21 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 22 | Refreshing |
| Feb | 22 | Refreshing |
| Mar | 22 | Refreshing |
| Apr | 21 | Refreshing |
| May | 19 | Cool |
| Jun | 19 | Cool |
| Jul | 18 | Cool |
| Aug | 17 | Cool |
| Sep | 17 | Cool |
| Oct | 18 | Cool |
| Nov | 20 | Cool |
| Dec | 21 | Refreshing |
UV index in Ilo in Spring
Clear-sky midday UV across spring averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ilo peaks around February 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 7 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 15 | 16 | 13 | 11 | 9 | 7 | 7 | 10 | 12 | 13 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 16 | Extreme |
| Mar | 13 | Extreme |
| Apr | 11 | Extreme |
| May | 9 | Very high |
| Jun | 7 | Very high |
| Jul | 7 | Very high |
| Aug | 10 | Very high |
| Sep | 12 | Extreme |
| Oct | 13 | Extreme |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Where is Ilo?
Ilo sits at 17.6°S, 71.3°W, 22 m above sea level, in Peru. The nearest listed city is San Antonio, 64 km away.
Topography around Ilo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ilo.
Within 3 km, the terrain around Ilo has only modest variations in elevation — a maximum elevation change of 192 m around an average of 66 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,476 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,396 m.
The land around Ilo is covered by water (40%), bare terrain (30%) and artificial surfaces (27%) within 3 km, water (51%) and bare terrain (46%) within 16 km, and bare terrain (58%) and water (38%) within 80 km.
Peru travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B / C
- 220 V · 60 Hz
- Prices
- ≈ 51% of US
- price level, 2025
- GDP per capita
- $9,684
- 2025
- Happiness
- 6.0 / 10
- World Happiness, 2025
- Safe drinking water
- 49%
- of population, 2024
- Homicide rate
- 8.6
- per 100k, 2021
- Road deaths
- 13.6
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 519
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Ilo (-17.6319°, -71.3411°, elevation 22 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.