Callao weather in October
In October, Callao sees average daytime highs of 17°C and overnight lows near 16°C, with 3 mm of rain across 0.3 wet days and about 12.3 hours of daylight. It is the 9th-warmest and 8th-wettest month of the year here.
Day-to-day highs hold fairly steady near 17°C through the month. The sky is clear or mostly clear about 6% of the time in October, and the air most often feels comfortable.
Daylight stretches from about 12 h 06 min at the start of October to 12 h 24 min by month's end. Set against the rest of the year, October is Callao's 6th-clearest and 5th-windiest month. For the whole year in context, see Callao's year-round climate.
- Daytime high
- 17°
- 9th warmest
- Overnight low
- 16°
- 3rd coldest
- Rainfall
- 3 mm
- 0.3 wet days
- Daylight
- 12 h 18 min
- 5:45 AM – 6:02 PM
- Cloud cover
- 74%
- 6th clearest
- Wind
- 20 km/h
- 5th windiest
- Solar energy
- 6.44 kWh/m²
- Travel score
- 6.2
- out of 10
Callao is city and main seaport of Peru.
- Air quality
- High
- PM2.5 25.5 µg/m³ · 2016
- Density
- 8,343/km²
- people per km²
- Founded
- 1537
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in October
Day-to-day highs hold fairly steady near 17°C through the month.
A typical October day in Callao reaches about 17°C in the afternoon and slips back to 16°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 18°C. Set against its neighbours, October runs on par with September and about 1°C cooler than November.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 |
| Avg low (°C) | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 16 | 15 |
| 2 | 16 | 15 |
| 3 | 16 | 15 |
| 4 | 17 | 15 |
| 5 | 17 | 15 |
| 6 | 17 | 15 |
| 7 | 17 | 15 |
| 8 | 17 | 16 |
| 9 | 17 | 16 |
| 10 | 17 | 16 |
| 11 | 17 | 16 |
| 12 | 17 | 16 |
| 13 | 17 | 16 |
| 14 | 17 | 16 |
| 15 | 17 | 16 |
| 16 | 17 | 16 |
| 17 | 17 | 16 |
| 18 | 17 | 16 |
| 19 | 17 | 16 |
| 20 | 17 | 16 |
| 21 | 17 | 16 |
| 22 | 17 | 16 |
| 23 | 17 | 16 |
| 24 | 17 | 16 |
| 25 | 17 | 16 |
| 26 | 17 | 16 |
| 27 | 17 | 16 |
| 28 | 17 | 16 |
| 29 | 17 | 16 |
| 30 | 17 | 16 |
| 31 | 17 | 16 |
Callao weather by month
How October compares with the rest of the year at a glance. October is the 9th-warmest and 8th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 22° / 20° | 5 | 1.5 | 12.6 | 7.4 |
| Feb | 23° / 21° | 8 | 2 | 12.4 | 7.4 |
| Mar | 22° / 21° | 6 | 1.7 | 12.1 | 7.4 |
| Apr | 20° / 19° | 2 | 0.2 | 11.7 | 7.4 |
| May | 19° / 18° | 2 | 0.2 | 11.5 | 7.1 |
| Jun | 18° / 17° | 5 | 1.1 | 11.3 | 6.5 |
| Jul | 17° / 16° | 5 | 1.2 | 11.4 | 6.1 |
| Aug | 16° / 15° | 5 | 1.2 | 11.6 | 6.0 |
| Sep | 16° / 15° | 4 | 0.5 | 11.9 | 6.0 |
| Oct | 17° / 16° | 3 | 0.3 | 12.3 | 6.2 |
| Nov | 18° / 17° | 2 | 0.1 | 12.6 | 6.9 |
| Dec | 20° / 19° | 3 | 0.6 | 12.7 | 7.1 |
Cloud cover in October
The sky is clear or mostly clear about 6% of the time in October.
Beyond those clear spells, partly cloudy skies cover about 20% of October, with mostly cloudy or overcast conditions the remaining 74%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 28 | 28 | 27 | 27 | 27 | 26 | 26 | 24 | 24 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 24 | 25 | 25 |
| Cloudier (%) | 72 | 72 | 72 | 72 | 71 | 71 | 71 | 72 | 72 | 72 | 73 | 73 | 73 | 74 | 74 | 76 | 76 | 77 | 77 | 78 | 78 | 78 | 78 | 78 | 78 | 77 | 77 | 77 | 76 | 75 | 75 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 28 | 72 |
| 2 | 28 | 72 |
| 3 | 28 | 72 |
| 4 | 28 | 72 |
| 5 | 29 | 71 |
| 6 | 29 | 71 |
| 7 | 29 | 71 |
| 8 | 28 | 72 |
| 9 | 28 | 72 |
| 10 | 28 | 72 |
| 11 | 27 | 73 |
| 12 | 27 | 73 |
| 13 | 27 | 73 |
| 14 | 26 | 74 |
| 15 | 26 | 74 |
| 16 | 24 | 76 |
| 17 | 24 | 76 |
| 18 | 23 | 77 |
| 19 | 23 | 77 |
| 20 | 22 | 78 |
| 21 | 22 | 78 |
| 22 | 22 | 78 |
| 23 | 22 | 78 |
| 24 | 22 | 78 |
| 25 | 22 | 78 |
| 26 | 23 | 77 |
| 27 | 23 | 77 |
| 28 | 23 | 77 |
| 29 | 24 | 76 |
| 30 | 25 | 75 |
| 31 | 25 | 75 |
Chance of precipitation in October
Callao gets around 3 mm of rain over 0.3 wet days in October. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 1% and peaks near 1% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Rain chance (%) | |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 1 |
| 13 | 1 |
| 14 | 1 |
| 15 | 1 |
| 16 | 1 |
| 17 | 1 |
| 18 | 1 |
| 19 | 1 |
| 20 | 1 |
| 21 | 1 |
| 22 | 1 |
| 23 | 1 |
| 24 | 1 |
| 25 | 1 |
| 26 | 1 |
| 27 | 1 |
| 28 | 1 |
| 29 | 1 |
| 30 | 1 |
| 31 | 1 |
Humidity in October
Most of October feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, October lands in the comfortable band about 85% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Comfortable (%) | 91 | 91 | 91 | 91 | 90 | 91 | 90 | 90 | 89 | 90 | 89 | 89 | 88 | 88 | 87 | 87 | 86 | 86 | 85 | 85 | 84 | 83 | 82 | 81 | 80 | 79 | 78 | 76 | 75 | 73 | 71 |
| Humid (%) | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 11 | 12 | 12 | 13 | 13 | 14 | 14 | 15 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 24 | 25 | 27 | 29 |
| Muggy (%) | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 2 | 91 | 6 | 1 |
| 2 | 2 | 91 | 6 | 1 |
| 3 | 2 | 91 | 7 | 0 |
| 4 | 2 | 91 | 7 | 0 |
| 5 | 2 | 90 | 8 | 0 |
| 6 | 1 | 91 | 8 | 0 |
| 7 | 1 | 90 | 9 | 0 |
| 8 | 1 | 90 | 9 | 0 |
| 9 | 1 | 89 | 10 | 0 |
| 10 | 0 | 90 | 10 | 0 |
| 11 | 0 | 89 | 11 | 0 |
| 12 | 0 | 89 | 11 | 0 |
| 13 | 0 | 88 | 12 | 0 |
| 14 | 0 | 88 | 12 | 0 |
| 15 | 0 | 87 | 13 | 0 |
| 16 | 0 | 87 | 13 | 0 |
| 17 | 0 | 86 | 14 | 0 |
| 18 | 0 | 86 | 14 | 0 |
| 19 | 0 | 85 | 15 | 0 |
| 20 | 0 | 85 | 15 | 0 |
| 21 | 0 | 84 | 16 | 0 |
| 22 | 0 | 83 | 17 | 0 |
| 23 | 0 | 82 | 18 | 0 |
| 24 | 0 | 81 | 19 | 0 |
| 25 | 0 | 80 | 20 | 0 |
| 26 | 0 | 79 | 21 | 0 |
| 27 | 0 | 78 | 22 | 0 |
| 28 | 0 | 76 | 24 | 0 |
| 29 | 0 | 75 | 25 | 0 |
| 30 | 0 | 73 | 27 | 0 |
| 31 | 0 | 71 | 29 | 0 |
Wind in October
Winds average 20 km/h in October.
Across October, daily wind ranges from about 19 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 |
| Feels | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 20 | breezy |
| 2 | 20 | breezy |
| 3 | 20 | breezy |
| 4 | 20 | breezy |
| 5 | 20 | breezy |
| 6 | 20 | breezy |
| 7 | 20 | breezy |
| 8 | 20 | breezy |
| 9 | 20 | breezy |
| 10 | 20 | light breeze |
| 11 | 20 | light breeze |
| 12 | 20 | light breeze |
| 13 | 20 | light breeze |
| 14 | 20 | light breeze |
| 15 | 20 | light breeze |
| 16 | 20 | light breeze |
| 17 | 20 | light breeze |
| 18 | 19 | light breeze |
| 19 | 19 | light breeze |
| 20 | 19 | light breeze |
| 21 | 19 | light breeze |
| 22 | 19 | light breeze |
| 23 | 19 | light breeze |
| 24 | 19 | light breeze |
| 25 | 19 | light breeze |
| 26 | 19 | light breeze |
| 27 | 19 | light breeze |
| 28 | 19 | light breeze |
| 29 | 19 | light breeze |
| 30 | 19 | light breeze |
| 31 | 19 | light breeze |
Sunrise & sunset in October
Daylight runs from about 12 h 06 min at the start of October to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 18 minutes over October. Sunrise moves from 5:54 AM to 5:39 AM, and sunset from 6:01 PM to 6:05 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.3 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 |
| Sunrise (AM) | 5:54 | 5:54 | 5:53 | 5:52 | 5:52 | 5:51 | 5:50 | 5:50 | 5:49 | 5:49 | 5:48 | 5:48 | 5:47 | 5:46 | 5:46 | 5:45 | 5:45 | 5:44 | 5:44 | 5:43 | 5:43 | 5:43 | 5:42 | 5:42 | 5:41 | 5:41 | 5:41 | 5:40 | 5:40 | 5:40 | 5:39 |
| Sunset (PM) | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:02 | 6:02 | 6:02 | 6:02 | 6:02 | 6:02 | 6:02 | 6:03 | 6:03 | 6:03 | 6:03 | 6:03 | 6:04 | 6:04 | 6:04 | 6:04 | 6:05 | 6:05 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.1 | 5:54 | 6:01 |
| 2 | 12.1 | 5:54 | 6:01 |
| 3 | 12.1 | 5:53 | 6:01 |
| 4 | 12.1 | 5:52 | 6:01 |
| 5 | 12.2 | 5:52 | 6:01 |
| 6 | 12.2 | 5:51 | 6:01 |
| 7 | 12.2 | 5:50 | 6:01 |
| 8 | 12.2 | 5:50 | 6:01 |
| 9 | 12.2 | 5:49 | 6:01 |
| 10 | 12.2 | 5:49 | 6:01 |
| 11 | 12.2 | 5:48 | 6:01 |
| 12 | 12.2 | 5:48 | 6:01 |
| 13 | 12.2 | 5:47 | 6:01 |
| 14 | 12.3 | 5:46 | 6:02 |
| 15 | 12.3 | 5:46 | 6:02 |
| 16 | 12.3 | 5:45 | 6:02 |
| 17 | 12.3 | 5:45 | 6:02 |
| 18 | 12.3 | 5:44 | 6:02 |
| 19 | 12.3 | 5:44 | 6:02 |
| 20 | 12.3 | 5:43 | 6:02 |
| 21 | 12.3 | 5:43 | 6:03 |
| 22 | 12.3 | 5:43 | 6:03 |
| 23 | 12.3 | 5:42 | 6:03 |
| 24 | 12.4 | 5:42 | 6:03 |
| 25 | 12.4 | 5:41 | 6:03 |
| 26 | 12.4 | 5:41 | 6:04 |
| 27 | 12.4 | 5:41 | 6:04 |
| 28 | 12.4 | 5:40 | 6:04 |
| 29 | 12.4 | 5:40 | 6:04 |
| 30 | 12.4 | 5:40 | 6:05 |
| 31 | 12.4 | 5:39 | 6:05 |
Solar energy in October
Average shortwave solar energy reaching the ground each day in October, about 6.44 kWh/m².
For context, solar energy here swings from a low near 4.37 kWh/m² to a high of 6.75 kWh/m² in November across the year — October's 6.44 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.2 | 6.2 | 6.2 | 6.2 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.2 | Intense |
| 2 | 6.2 | Intense |
| 3 | 6.2 | Intense |
| 4 | 6.2 | Intense |
| 5 | 6.3 | Intense |
| 6 | 6.3 | Intense |
| 7 | 6.3 | Intense |
| 8 | 6.3 | Intense |
| 9 | 6.3 | Intense |
| 10 | 6.4 | Intense |
| 11 | 6.4 | Intense |
| 12 | 6.4 | Intense |
| 13 | 6.4 | Intense |
| 14 | 6.4 | Intense |
| 15 | 6.4 | Intense |
| 16 | 6.5 | Intense |
| 17 | 6.5 | Intense |
| 18 | 6.5 | Intense |
| 19 | 6.5 | Intense |
| 20 | 6.5 | Intense |
| 21 | 6.5 | Intense |
| 22 | 6.5 | Intense |
| 23 | 6.5 | Intense |
| 24 | 6.5 | Intense |
| 25 | 6.5 | Intense |
| 26 | 6.6 | Intense |
| 27 | 6.6 | Intense |
| 28 | 6.6 | Intense |
| 29 | 6.6 | Intense |
| 30 | 6.6 | Intense |
| 31 | 6.6 | Intense |
Is October a good time to visit Callao?
Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
October is a reasonable time to visit Callao for sightseeing.
What to pack for Callao in October
From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In October, Callao sees daytime highs around 17°C and nights near 16°C. Pack sun protection. Worth having: a warm layer.
Sea temperature near Callao in October
The nearest coast averages about 17°C in October — 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 September near 17°C.
It's comfortable for a long swim from Jan 1 to Apr 9 — about 3.3 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 21 | 22 | 21 | 20 | 19 | 18 | 18 | 17 | 17 | 17 | 18 | 19 |
| Comfort | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 21 | Refreshing |
| Feb | 22 | Refreshing |
| Mar | 21 | Refreshing |
| Apr | 20 | Cool |
| May | 19 | Cool |
| Jun | 18 | Cool |
| Jul | 18 | Cool |
| Aug | 17 | Cool |
| Sep | 17 | Cool |
| Oct | 17 | Cool |
| Nov | 18 | Cool |
| Dec | 19 | Cool |
UV index in Callao in October
Clear-sky midday UV in October peaks 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 Callao peaks around February 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 8 (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) | 14 | 16 | 13 | 12 | 10 | 8 | 8 | 10 | 10 | 13 | 12 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 16 | Extreme |
| Mar | 13 | Extreme |
| Apr | 12 | Extreme |
| May | 10 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 10 | Extreme |
| Sep | 10 | Extreme |
| Oct | 13 | Extreme |
| Nov | 12 | Extreme |
| Dec | 13 | Extreme |
Air quality in Callao in October
Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.
Air quality in Callao is worst in March — around 30 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Seasonal pattern from CAMS reanalysis, scaled to Callao's WHO annual average of 25.5 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 22 | 27 | 30 | 28 | 29 | 28 | 26 | 25 | 23 | 23 | 22 | 22 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 22 | Moderate |
| Feb | 27 | Moderate |
| Mar | 30 | Moderate |
| Apr | 28 | Moderate |
| May | 29 | Moderate |
| Jun | 28 | Moderate |
| Jul | 26 | Moderate |
| Aug | 25 | Moderate |
| Sep | 23 | Moderate |
| Oct | 23 | Moderate |
| Nov | 22 | Moderate |
| Dec | 22 | Moderate |
Where is Callao?
Callao sits at 12.1°S, 77.1°W, 5 m above sea level, in Peru. The nearest listed city is Carmen De La Legua Reynoso, 4.0 km away.
Topography around Callao
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Callao.
Within 3 km, the terrain around Callao has only modest variations in elevation — a maximum elevation change of 43 m around an average of 10 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 737 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,870 m.
The land around Callao is covered by artificial surfaces (54%) and water (33%) within 3 km, water (60%) and artificial surfaces (30%) within 16 km, and water (50%) and bare terrain (29%) 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 Callao (-12.0516°, -77.1345°, elevation 5 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).