Callao weather in May
In May, Callao sees average daytime highs of 19°C and overnight lows near 18°C, with 2 mm of rain across 0.2 wet days and about 11.5 hours of daylight. It is the 6th-warmest and 10th-wettest month of the year here.
Day-to-day highs hold fairly steady near 19°C through the month. The sky is clear or mostly clear about 10% of the time in May, and the air most often feels humid.
Daylight stretches from about 11 h 36 min at the start of May to 11 h 24 min by month's end. Set against the rest of the year, May is Callao's 1st-clearest and 7th-windiest month. For the whole year in context, see Callao's year-round climate.
- Daytime high
- 19°
- 6th warmest
- Overnight low
- 18°
- 7th coldest
- Rainfall
- 2 mm
- 0.2 wet days
- Daylight
- 11 h 24 min
- 6:21 AM – 5:48 PM
- Cloud cover
- 70%
- 1st clearest
- Wind
- 18 km/h
- 7th windiest
- Solar energy
- 4.89 kWh/m²
- Travel score
- 7.1
- 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 May
Day-to-day highs hold fairly steady near 19°C through the month.
A typical May day in Callao reaches about 19°C in the afternoon and slips back to 18°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 20°C. Set against its neighbours, May runs about 2°C cooler than April and about 1°C warmer than June.
| 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) | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| Avg low (°C) | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 19 | 18 |
| 2 | 19 | 18 |
| 3 | 19 | 18 |
| 4 | 19 | 18 |
| 5 | 19 | 18 |
| 6 | 19 | 18 |
| 7 | 19 | 18 |
| 8 | 19 | 18 |
| 9 | 19 | 18 |
| 10 | 19 | 18 |
| 11 | 19 | 18 |
| 12 | 19 | 18 |
| 13 | 19 | 18 |
| 14 | 19 | 18 |
| 15 | 19 | 18 |
| 16 | 19 | 18 |
| 17 | 19 | 18 |
| 18 | 19 | 18 |
| 19 | 19 | 18 |
| 20 | 18 | 17 |
| 21 | 18 | 17 |
| 22 | 18 | 17 |
| 23 | 18 | 17 |
| 24 | 18 | 17 |
| 25 | 18 | 17 |
| 26 | 18 | 17 |
| 27 | 18 | 17 |
| 28 | 18 | 17 |
| 29 | 18 | 17 |
| 30 | 18 | 17 |
| 31 | 18 | 17 |
Callao weather by month
How May compares with the rest of the year at a glance. May is the 6th-warmest and 10th-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 May
The sky is clear or mostly clear about 10% of the time in May, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 72%. Skies tend to cloud over as the month goes on.
| 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 (%) | 35 | 35 | 35 | 35 | 34 | 34 | 34 | 32 | 32 | 31 | 30 | 29 | 28 | 27 | 27 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 24 |
| Cloudier (%) | 65 | 65 | 65 | 65 | 66 | 66 | 66 | 68 | 68 | 69 | 70 | 71 | 72 | 73 | 73 | 75 | 75 | 75 | 76 | 75 | 75 | 75 | 74 | 74 | 74 | 74 | 74 | 75 | 75 | 75 | 76 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 35 | 65 |
| 2 | 35 | 65 |
| 3 | 35 | 65 |
| 4 | 35 | 65 |
| 5 | 34 | 66 |
| 6 | 34 | 66 |
| 7 | 34 | 66 |
| 8 | 32 | 68 |
| 9 | 32 | 68 |
| 10 | 31 | 69 |
| 11 | 30 | 70 |
| 12 | 29 | 71 |
| 13 | 28 | 72 |
| 14 | 27 | 73 |
| 15 | 27 | 73 |
| 16 | 25 | 75 |
| 17 | 25 | 75 |
| 18 | 25 | 75 |
| 19 | 24 | 76 |
| 20 | 25 | 75 |
| 21 | 25 | 75 |
| 22 | 25 | 75 |
| 23 | 26 | 74 |
| 24 | 26 | 74 |
| 25 | 26 | 74 |
| 26 | 26 | 74 |
| 27 | 26 | 74 |
| 28 | 25 | 75 |
| 29 | 25 | 75 |
| 30 | 25 | 75 |
| 31 | 24 | 76 |
Chance of precipitation in May
Callao gets around 2 mm of rain over 0.2 wet days in May. 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 2% 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 (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 |
| Rain chance (%) | |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 1 |
| 19 | 1 |
| 20 | 1 |
| 21 | 1 |
| 22 | 1 |
| 23 | 1 |
| 24 | 1 |
| 25 | 1 |
| 26 | 1 |
| 27 | 2 |
| 28 | 2 |
| 29 | 2 |
| 30 | 2 |
| 31 | 2 |
Humidity in May
Most of May feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the humid band about 70% of days. Sticky, muggy-or-worse air turns up on roughly 11% of them.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 1 | 1 | 2 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 11 | 12 | 14 | 16 | 17 | 19 | 21 | 23 | 26 | 28 | 30 | 32 | 34 | 35 | 37 | 39 | 40 | 42 | 43 | 44 |
| Humid (%) | 78 | 79 | 79 | 80 | 80 | 79 | 79 | 79 | 78 | 78 | 77 | 76 | 76 | 74 | 73 | 73 | 72 | 70 | 69 | 67 | 65 | 64 | 63 | 61 | 60 | 59 | 57 | 56 | 54 | 54 | 53 |
| Muggy (%) | 21 | 20 | 19 | 18 | 17 | 17 | 16 | 15 | 15 | 14 | 14 | 13 | 12 | 12 | 11 | 10 | 9 | 9 | 8 | 7 | 7 | 6 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 3 | 3 |
| Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|
| 1 | 1 | 78 | 21 |
| 2 | 1 | 79 | 20 |
| 3 | 2 | 79 | 19 |
| 4 | 2 | 80 | 18 |
| 5 | 3 | 80 | 17 |
| 6 | 4 | 79 | 17 |
| 7 | 5 | 79 | 16 |
| 8 | 6 | 79 | 15 |
| 9 | 7 | 78 | 15 |
| 10 | 8 | 78 | 14 |
| 11 | 9 | 77 | 14 |
| 12 | 11 | 76 | 13 |
| 13 | 12 | 76 | 12 |
| 14 | 14 | 74 | 12 |
| 15 | 16 | 73 | 11 |
| 16 | 17 | 73 | 10 |
| 17 | 19 | 72 | 9 |
| 18 | 21 | 70 | 9 |
| 19 | 23 | 69 | 8 |
| 20 | 26 | 67 | 7 |
| 21 | 28 | 65 | 7 |
| 22 | 30 | 64 | 6 |
| 23 | 32 | 63 | 5 |
| 24 | 34 | 61 | 5 |
| 25 | 35 | 60 | 5 |
| 26 | 37 | 59 | 4 |
| 27 | 39 | 57 | 4 |
| 28 | 40 | 56 | 4 |
| 29 | 42 | 54 | 4 |
| 30 | 43 | 54 | 3 |
| 31 | 44 | 53 | 3 |
Wind in May
Winds average 18 km/h in May.
Across May, daily wind ranges from about 17 km/h on the calmest days to 19 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) | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 |
| Feels | 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 | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 17 | light breeze |
| 2 | 17 | light breeze |
| 3 | 17 | light breeze |
| 4 | 17 | light breeze |
| 5 | 17 | light breeze |
| 6 | 17 | light breeze |
| 7 | 18 | light breeze |
| 8 | 18 | light breeze |
| 9 | 18 | light breeze |
| 10 | 18 | light breeze |
| 11 | 18 | light breeze |
| 12 | 18 | light breeze |
| 13 | 18 | light breeze |
| 14 | 18 | light breeze |
| 15 | 18 | light breeze |
| 16 | 18 | light breeze |
| 17 | 18 | light breeze |
| 18 | 18 | light breeze |
| 19 | 18 | light breeze |
| 20 | 18 | light breeze |
| 21 | 18 | light breeze |
| 22 | 18 | light breeze |
| 23 | 18 | 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 May
Daylight runs from about 11 h 36 min at the start of May to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 12 minutes over May. Sunrise moves from 6:18 AM to 6:25 AM, and sunset from 5:53 PM to 5:46 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) | 11.6 | 11.6 | 11.6 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.5 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 |
| Sunrise (AM) | 6:18 | 6:19 | 6:19 | 6:19 | 6:19 | 6:19 | 6:19 | 6:20 | 6:20 | 6:20 | 6:20 | 6:20 | 6:21 | 6:21 | 6:21 | 6:21 | 6:22 | 6:22 | 6:22 | 6:22 | 6:23 | 6:23 | 6:23 | 6:23 | 6:24 | 6:24 | 6:24 | 6:25 | 6:25 | 6:25 | 6:25 |
| Sunset (PM) | 5:53 | 5:53 | 5:52 | 5:52 | 5:51 | 5:51 | 5:51 | 5:50 | 5:50 | 5:50 | 5:49 | 5:49 | 5:49 | 5:49 | 5:48 | 5:48 | 5:48 | 5:48 | 5:48 | 5:47 | 5:47 | 5:47 | 5:47 | 5:47 | 5:47 | 5:47 | 5:47 | 5:47 | 5:46 | 5:46 | 5:46 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.6 | 6:18 | 5:53 |
| 2 | 11.6 | 6:19 | 5:53 |
| 3 | 11.6 | 6:19 | 5:52 |
| 4 | 11.5 | 6:19 | 5:52 |
| 5 | 11.5 | 6:19 | 5:51 |
| 6 | 11.5 | 6:19 | 5:51 |
| 7 | 11.5 | 6:19 | 5:51 |
| 8 | 11.5 | 6:20 | 5:50 |
| 9 | 11.5 | 6:20 | 5:50 |
| 10 | 11.5 | 6:20 | 5:50 |
| 11 | 11.5 | 6:20 | 5:49 |
| 12 | 11.5 | 6:20 | 5:49 |
| 13 | 11.5 | 6:21 | 5:49 |
| 14 | 11.5 | 6:21 | 5:49 |
| 15 | 11.5 | 6:21 | 5:48 |
| 16 | 11.4 | 6:21 | 5:48 |
| 17 | 11.4 | 6:22 | 5:48 |
| 18 | 11.4 | 6:22 | 5:48 |
| 19 | 11.4 | 6:22 | 5:48 |
| 20 | 11.4 | 6:22 | 5:47 |
| 21 | 11.4 | 6:23 | 5:47 |
| 22 | 11.4 | 6:23 | 5:47 |
| 23 | 11.4 | 6:23 | 5:47 |
| 24 | 11.4 | 6:23 | 5:47 |
| 25 | 11.4 | 6:24 | 5:47 |
| 26 | 11.4 | 6:24 | 5:47 |
| 27 | 11.4 | 6:24 | 5:47 |
| 28 | 11.4 | 6:25 | 5:47 |
| 29 | 11.4 | 6:25 | 5:46 |
| 30 | 11.4 | 6:25 | 5:46 |
| 31 | 11.4 | 6:25 | 5:46 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 4.89 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 — May's 4.89 kWh/m² sits near the bottom.
| 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) | 5.3 | 5.3 | 5.2 | 5.2 | 5.2 | 5.2 | 5.1 | 5.1 | 5.1 | 5.0 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.9 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.6 | 4.6 | 4.6 | 4.6 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.3 | Bright |
| 2 | 5.3 | Bright |
| 3 | 5.2 | Bright |
| 4 | 5.2 | Bright |
| 5 | 5.2 | Bright |
| 6 | 5.2 | Bright |
| 7 | 5.1 | Bright |
| 8 | 5.1 | Bright |
| 9 | 5.1 | Bright |
| 10 | 5.0 | Bright |
| 11 | 5.0 | Bright |
| 12 | 5.0 | Bright |
| 13 | 5.0 | Bright |
| 14 | 4.9 | Bright |
| 15 | 4.9 | Bright |
| 16 | 4.9 | Bright |
| 17 | 4.8 | Bright |
| 18 | 4.8 | Bright |
| 19 | 4.8 | Bright |
| 20 | 4.8 | Bright |
| 21 | 4.8 | Bright |
| 22 | 4.7 | Bright |
| 23 | 4.7 | Bright |
| 24 | 4.7 | Bright |
| 25 | 4.7 | Bright |
| 26 | 4.7 | Bright |
| 27 | 4.7 | Bright |
| 28 | 4.6 | Bright |
| 29 | 4.6 | Bright |
| 30 | 4.6 | Bright |
| 31 | 4.6 | Bright |
Is May a good time to visit Callao?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is one of the better times to visit Callao for general sightseeing.
What to pack for Callao in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Callao sees daytime highs around 19°C and nights near 18°C. Worth packing: sun protection.
Sea temperature near Callao in May
The nearest coast averages about 19°C in May — 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 May
Clear-sky midday UV in May peaks around 10 (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 May
Average fine-particle pollution (PM2.5) through the year — so you can see where May 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).