Callao weather in September
In September, Callao sees average daytime highs of 16°C and overnight lows near 15°C, with 4 mm of rain across 0.5 wet days and about 11.9 hours of daylight. It is the 11th-warmest and 7th-wettest month of the year here.
Day-to-day highs hold fairly steady near 16°C through the month. The sky is clear or mostly clear about 7% of the time in September, and the air most often feels comfortable.
Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Callao's 4th-clearest and 1st-windiest month. For the whole year in context, see Callao's year-round climate.
- Daytime high
- 16°
- 11th warmest
- Overnight low
- 15°
- 2nd coldest
- Rainfall
- 4 mm
- 0.5 wet days
- Daylight
- 11 h 54 min
- 6:05 AM – 6:01 PM
- Cloud cover
- 72%
- 4th clearest
- Wind
- 21 km/h
- 1st windiest
- Solar energy
- 5.8 kWh/m²
- Travel score
- 6.0
- 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 September
Day-to-day highs hold fairly steady near 16°C through the month.
A typical September day in Callao reaches about 16°C in the afternoon and slips back to 15°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 17°C. Set against its neighbours, September runs on par with August and on par with October.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 16 | 16 | 16 | 16 | 16 | 16 | 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 low (°C) | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 16 | 15 |
| 2 | 16 | 15 |
| 3 | 16 | 15 |
| 4 | 16 | 15 |
| 5 | 16 | 15 |
| 6 | 16 | 15 |
| 7 | 16 | 15 |
| 8 | 16 | 15 |
| 9 | 16 | 15 |
| 10 | 16 | 15 |
| 11 | 16 | 15 |
| 12 | 16 | 15 |
| 13 | 16 | 15 |
| 14 | 16 | 15 |
| 15 | 16 | 15 |
| 16 | 16 | 15 |
| 17 | 16 | 15 |
| 18 | 16 | 15 |
| 19 | 16 | 15 |
| 20 | 16 | 15 |
| 21 | 16 | 15 |
| 22 | 16 | 15 |
| 23 | 16 | 15 |
| 24 | 16 | 15 |
| 25 | 16 | 15 |
| 26 | 16 | 15 |
| 27 | 16 | 15 |
| 28 | 16 | 15 |
| 29 | 16 | 15 |
| 30 | 16 | 15 |
Callao weather by month
How September compares with the rest of the year at a glance. September is the 11th-warmest and 7th-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 September
The sky is clear or mostly clear about 7% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 72%.
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 34 | 34 | 34 | 34 | 33 | 32 | 31 | 31 | 29 | 29 | 28 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 28 |
| Cloudier (%) | 66 | 66 | 66 | 66 | 67 | 68 | 69 | 69 | 71 | 71 | 72 | 73 | 73 | 73 | 74 | 74 | 74 | 74 | 74 | 74 | 74 | 74 | 74 | 73 | 73 | 73 | 73 | 73 | 73 | 72 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 34 | 66 |
| 2 | 34 | 66 |
| 3 | 34 | 66 |
| 4 | 34 | 66 |
| 5 | 33 | 67 |
| 6 | 32 | 68 |
| 7 | 31 | 69 |
| 8 | 31 | 69 |
| 9 | 29 | 71 |
| 10 | 29 | 71 |
| 11 | 28 | 72 |
| 12 | 27 | 73 |
| 13 | 27 | 73 |
| 14 | 27 | 73 |
| 15 | 26 | 74 |
| 16 | 26 | 74 |
| 17 | 26 | 74 |
| 18 | 26 | 74 |
| 19 | 26 | 74 |
| 20 | 26 | 74 |
| 21 | 26 | 74 |
| 22 | 26 | 74 |
| 23 | 26 | 74 |
| 24 | 27 | 73 |
| 25 | 27 | 73 |
| 26 | 27 | 73 |
| 27 | 27 | 73 |
| 28 | 27 | 73 |
| 29 | 27 | 73 |
| 30 | 28 | 72 |
Chance of precipitation in September
Callao gets around 4 mm of rain over 0.5 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 2% and peaks near 3% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 |
| Rain chance (%) | |
|---|---|
| 1 | 3 |
| 2 | 2 |
| 3 | 2 |
| 4 | 2 |
| 5 | 2 |
| 6 | 2 |
| 7 | 2 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 1 |
| 13 | 1 |
| 14 | 2 |
| 15 | 2 |
| 16 | 2 |
| 17 | 2 |
| 18 | 2 |
| 19 | 2 |
| 20 | 2 |
| 21 | 2 |
| 22 | 2 |
| 23 | 2 |
| 24 | 2 |
| 25 | 2 |
| 26 | 2 |
| 27 | 1 |
| 28 | 1 |
| 29 | 1 |
| 30 | 1 |
Humidity in September
Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the comfortable band about 92% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Comfortable (%) | 92 | 92 | 92 | 92 | 92 | 92 | 92 | 92 | 92 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 93 | 92 | 92 | 92 | 92 | 92 | 92 | 92 | 92 | 92 | 91 | 91 | 91 |
| Humid (%) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 |
| Muggy (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 3 | 92 | 4 | 1 |
| 2 | 3 | 92 | 4 | 1 |
| 3 | 3 | 92 | 4 | 1 |
| 4 | 3 | 92 | 4 | 1 |
| 5 | 3 | 92 | 4 | 1 |
| 6 | 3 | 92 | 4 | 1 |
| 7 | 3 | 92 | 4 | 1 |
| 8 | 3 | 92 | 4 | 1 |
| 9 | 3 | 92 | 4 | 1 |
| 10 | 3 | 93 | 4 | 0 |
| 11 | 3 | 93 | 4 | 0 |
| 12 | 3 | 93 | 4 | 0 |
| 13 | 3 | 93 | 4 | 0 |
| 14 | 3 | 93 | 4 | 0 |
| 15 | 3 | 93 | 4 | 0 |
| 16 | 3 | 93 | 4 | 0 |
| 17 | 3 | 93 | 4 | 0 |
| 18 | 3 | 93 | 4 | 0 |
| 19 | 3 | 92 | 4 | 1 |
| 20 | 3 | 92 | 4 | 1 |
| 21 | 3 | 92 | 4 | 1 |
| 22 | 3 | 92 | 4 | 1 |
| 23 | 3 | 92 | 4 | 1 |
| 24 | 3 | 92 | 4 | 1 |
| 25 | 3 | 92 | 4 | 1 |
| 26 | 3 | 92 | 4 | 1 |
| 27 | 3 | 92 | 4 | 1 |
| 28 | 3 | 91 | 5 | 1 |
| 29 | 3 | 91 | 5 | 1 |
| 30 | 3 | 91 | 5 | 1 |
Wind in September
Winds average 21 km/h in September, the windiest month of the year.
Across September, daily wind ranges from about 20 km/h on the calmest days to 21 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Feels | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy |
| 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 | 21 | breezy |
| 11 | 21 | breezy |
| 12 | 21 | breezy |
| 13 | 21 | breezy |
| 14 | 21 | breezy |
| 15 | 21 | breezy |
| 16 | 21 | breezy |
| 17 | 21 | breezy |
| 18 | 21 | breezy |
| 19 | 21 | breezy |
| 20 | 21 | breezy |
| 21 | 21 | breezy |
| 22 | 21 | breezy |
| 23 | 21 | breezy |
| 24 | 20 | breezy |
| 25 | 20 | breezy |
| 26 | 20 | breezy |
| 27 | 20 | breezy |
| 28 | 20 | breezy |
| 29 | 20 | breezy |
| 30 | 20 | breezy |
Sunrise & sunset in September
Daylight runs from about 11 h 48 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 18 minutes over September. Sunrise moves from 6:15 AM to 5:55 AM, and sunset from 6:01 PM to 6:01 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 |
| Sunrise (AM) | 6:15 | 6:15 | 6:14 | 6:13 | 6:13 | 6:12 | 6:11 | 6:11 | 6:10 | 6:09 | 6:08 | 6:08 | 6:07 | 6:06 | 6:06 | 6:05 | 6:04 | 6:03 | 6:03 | 6:02 | 6:01 | 6:01 | 6:00 | 5:59 | 5:58 | 5:58 | 5:57 | 5:56 | 5:56 | 5:55 |
| 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 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.8 | 6:15 | 6:01 |
| 2 | 11.8 | 6:15 | 6:01 |
| 3 | 11.8 | 6:14 | 6:01 |
| 4 | 11.8 | 6:13 | 6:01 |
| 5 | 11.8 | 6:13 | 6:01 |
| 6 | 11.8 | 6:12 | 6:01 |
| 7 | 11.8 | 6:11 | 6:01 |
| 8 | 11.8 | 6:11 | 6:01 |
| 9 | 11.9 | 6:10 | 6:01 |
| 10 | 11.9 | 6:09 | 6:01 |
| 11 | 11.9 | 6:08 | 6:01 |
| 12 | 11.9 | 6:08 | 6:01 |
| 13 | 11.9 | 6:07 | 6:01 |
| 14 | 11.9 | 6:06 | 6:01 |
| 15 | 11.9 | 6:06 | 6:01 |
| 16 | 11.9 | 6:05 | 6:01 |
| 17 | 11.9 | 6:04 | 6:01 |
| 18 | 12.0 | 6:03 | 6:01 |
| 19 | 12.0 | 6:03 | 6:01 |
| 20 | 12.0 | 6:02 | 6:01 |
| 21 | 12.0 | 6:01 | 6:01 |
| 22 | 12.0 | 6:01 | 6:01 |
| 23 | 12.0 | 6:00 | 6:01 |
| 24 | 12.0 | 5:59 | 6:01 |
| 25 | 12.0 | 5:58 | 6:01 |
| 26 | 12.0 | 5:58 | 6:01 |
| 27 | 12.1 | 5:57 | 6:01 |
| 28 | 12.1 | 5:56 | 6:01 |
| 29 | 12.1 | 5:56 | 6:01 |
| 30 | 12.1 | 5:55 | 6:01 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 5.8 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 — September's 5.8 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.5 | 5.5 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.7 | 5.7 | 5.7 | 5.7 | 5.7 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.9 | 5.9 | 5.9 | 5.9 | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | 6.1 | 6.1 | 6.1 |
| 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 | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.5 | Bright |
| 2 | 5.5 | Bright |
| 3 | 5.6 | Bright |
| 4 | 5.6 | Bright |
| 5 | 5.6 | Bright |
| 6 | 5.6 | Bright |
| 7 | 5.6 | Bright |
| 8 | 5.7 | Bright |
| 9 | 5.7 | Bright |
| 10 | 5.7 | Bright |
| 11 | 5.7 | Bright |
| 12 | 5.7 | Bright |
| 13 | 5.8 | Bright |
| 14 | 5.8 | Bright |
| 15 | 5.8 | Bright |
| 16 | 5.8 | Bright |
| 17 | 5.8 | Bright |
| 18 | 5.8 | Bright |
| 19 | 5.9 | Bright |
| 20 | 5.9 | Bright |
| 21 | 5.9 | Bright |
| 22 | 5.9 | Bright |
| 23 | 6.0 | Bright |
| 24 | 6.0 | Bright |
| 25 | 6.0 | Bright |
| 26 | 6.0 | Intense |
| 27 | 6.0 | Intense |
| 28 | 6.1 | Intense |
| 29 | 6.1 | Intense |
| 30 | 6.1 | Intense |
Is September a good time to visit Callao?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Callao for sightseeing.
What to pack for Callao in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Callao sees daytime highs around 16°C and nights near 15°C. Worth packing: a warm layer, sun protection and a windbreaker.
Sea temperature near Callao in September
The nearest coast averages about 17°C in September — 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 September
Clear-sky midday UV in September 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 September
Average fine-particle pollution (PM2.5) through the year — so you can see where September 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).