Chalchuapa in Fall
In fall (September, October and November), Chalchuapa sees average daytime highs around 28°C and overnight lows near 19°C, with 589 mm of rain over about 53 wet days across the season. It is the coldest season of the year and the 2nd-wettest season.
Across fall, daytime highs hold fairly steady around 28°C. The sky is clear or mostly clear about 19% of the time across fall, and the air most often feels muggy.
Fall is Chalchuapa's 2nd-best season to visit on our travel score. For the whole year in context, see Chalchuapa's year-round climate.
- Avg daytime high
- 28°C
- coldest season of the year
- Avg overnight low
- 19°C
- Rainfall
- 589 mm
- 53 wet days
- Avg wind
- 6 km/h
- Travel score
- 5.0
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Chalchuapa in Fall
Across fall, daytime highs hold fairly steady around 28°C.
A typical fall day in Chalchuapa reaches about 28°C and drops to 19°C overnight. The warmest of the three months is November, the coolest November.
Chalchuapa weather by month
How the three fall 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 | 28° / 17° | 3 | 1.1 | 11.3 | 7.6 |
| Feb | 30° / 17° | 3 | 1.2 | 11.5 | 6.8 |
| Mar | 30° / 18° | 13 | 3.9 | 11.9 | 5.9 |
| Apr | 30° / 19° | 54 | 11.1 | 12.3 | 4.8 |
| May | 29° / 20° | 210 | 23.3 | 12.6 | 3.7 |
| Jun | 28° / 20° | 286 | 25.2 | 12.8 | 3.6 |
| Jul | 29° / 20° | 142 | 16.8 | 12.7 | 4.4 |
| Aug | 29° / 20° | 203 | 21.7 | 12.5 | 3.9 |
| Sep | 28° / 19° | 321 | 26.9 | 12.1 | 3.5 |
| Oct | 28° / 19° | 231 | 20.6 | 11.7 | 4.7 |
| Nov | 28° / 18° | 37 | 5.8 | 11.4 | 6.7 |
| Dec | 28° / 17° | 9 | 2 | 11.2 | 7.4 |
Cloud cover in Fall
The sky is clear or mostly clear about 19% of the time across fall.
Chance of precipitation in Fall
Chalchuapa gets around 589 mm of rain over 53 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 6 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 18 min in early September to 11 h 12 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 5.0 kWh/m².
Hazard calendar for Chalchuapa
In fall, Chalchuapa overlaps its atlantic hurricane and monsoon season. The full year is below, with each hazard's peak months called out.
Chalchuapa sits in the Atlantic hurricane belt; the season peaks August–October.
Chalchuapa's monsoon runs August–October, when most of the year's rain falls.
Is fall a good time to visit Chalchuapa?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Chalchuapa for sightseeing.
What to pack for Chalchuapa in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Chalchuapa sees daytime highs around 28°C and nights near 19°C. Pack light clothes and rain gear. Worth having: sun protection. About 53 days see rain.
Sea temperature near Chalchuapa in Fall
The nearest coast averages about 29°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 45 km away) is warmest in August at about 30°C and coldest in January near 28°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 28 | 28 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 28 | Tropical |
| Feb | 28 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 30 | Tropical |
| Aug | 30 | Tropical |
| Sep | 30 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 29 | Tropical |
UV index in Chalchuapa in Fall
Clear-sky midday UV across fall averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Chalchuapa peaks around April 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 at about 9 (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) | 10 | 13 | 13 | 14 | 12 | 13 | 13 | 12 | 12 | 11 | 9 | 9 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 13 | Extreme |
| Mar | 13 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 13 | Extreme |
| Jul | 13 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 9 | Very high |
Air quality in Chalchuapa in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Chalchuapa is worst in April — around 34 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (January, 16 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 16 | 17 | 21 | 34 | 32 | 23 | 23 | 21 | 21 | 21 | 20 | 17 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 17 | Moderate |
| Mar | 21 | Moderate |
| Apr | 34 | Moderate |
| May | 32 | Moderate |
| Jun | 23 | Moderate |
| Jul | 23 | Moderate |
| Aug | 21 | Moderate |
| Sep | 21 | Moderate |
| Oct | 21 | Moderate |
| Nov | 20 | Moderate |
| Dec | 17 | Moderate |
Where is Chalchuapa?
Chalchuapa sits at 14.0°N, 89.7°W, 710 m above sea level, in El Salvador. The nearest listed city is Santa Ana, 13 km away.
Topography around Chalchuapa
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Chalchuapa.
Within 3 km, the terrain around Chalchuapa has significant variations in elevation — a maximum elevation change of 256 m around an average of 721 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,953 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,703 m.
The land around Chalchuapa is covered by trees (44%) and grassland (20%) within 3 km, trees (65%) within 16 km, and trees (48%) and grassland (23%) within 80 km.
El Salvador travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 115 V · 60 Hz
- Prices
- ≈ 41% of US
- price level, 2025
- GDP per capita
- $5,767
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Homicide rate
- 7.9
- per 100k, 2022
- Road deaths
- 20.9
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 523
- 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 Chalchuapa (13.9867°, -89.6811°, elevation 710 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.