Chalatenango weather in September

In September, Chalatenango sees average daytime highs of 30°C and overnight lows near 21°C, with 215 mm of rain across 25.8 wet days and about 12.1 hours of daylight. It is the 11th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 6% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Chalatenango's 11th-clearest and 12th-windiest month. For the whole year in context, see Chalatenango's year-round climate.

Daytime high
30°
11th warmest
Overnight low
21°
7th coldest
Rainfall
215 mm
25.8 wet days
Daylight
12 h 06 min
5:48 AM – 5:52 PM
Cloud cover
79%
11th clearest
Wind
4 km/h
12th windiest
Solar energy
4.89 kWh/m²
Travel score
2.9
out of 10

Chalatenango is city in El Salvador.

Density
147/km²
people per km²
Founded
1786

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Chalatenango reaches about 30°C in the afternoon and slips back to 21°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 33°C. Set against its neighbours, September runs about 1°C cooler than August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13121
23121
33121
43121
53121
63121
73121
83121
93121
103121
113121
123121
133121
143121
153121
163021
173021
183021
193021
203021
213021
223021
233021
243021
253021
263021
273021
283021
293021
303021

How September really feels in Chalatenango

Once humidity and wind are folded in, September averages 28 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
28
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Chalatenango weather by month

How September compares with the rest of the year at a glance. September is the 11th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 19°10.211.35.5
Feb33° / 20°10.111.54.6
Mar34° / 21°51.311.93.9
Apr34° / 22°236.212.33.3
May32° / 22°13720.812.62.8
Jun31° / 22°1842412.82.9
Jul32° / 22°12118.212.73.2
Aug32° / 22°14321.312.53.0
Sep30° / 21°21525.812.12.9
Oct30° / 21°16419.411.73.9
Nov31° / 20°285.111.35.4
Dec31° / 20°4111.25.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 82%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12278
22179
32080
42080
52080
62080
72080
81981
91981
101981
111981
121981
131981
141981
151783
161684
171684
181684
191684
201684
211684
221684
231684
241684
251684
261684
271684
281882
291981
301981

Chance of precipitation in September

Any precipitation

Chalatenango gets around 215 mm of rain over 25.8 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 85% and peaks near 90% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
180
280
381
481
581
681
781
881
981
1081
1182
1282
1383
1483
1584
1685
1785
1886
1987
2088
2189
2290
2390
2490
2590
2689
2788
2888
2987
3085

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the muggy band about 67% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
167024
257124
357124
457025
557025
647125
747026
847026
946927
1046828
1136928
1236829
1336730
1436631
1526632
1626533
1726434
1826335
1916336
2016336
2116336
2216336
2316336
2416435
2516435
2616534
2716534
2816633
2916732
3026632

Wind in September

Winds average 4 km/h in September, the calmest month.

Across September, daily wind ranges from about 3 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
213calm
223calm
233calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over September. Sunrise moves from 5:47 AM to 5:48 AM, and sunset from 6:04 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:476:04
212.35:476:03
312.25:476:02
412.25:476:02
512.25:476:01
612.25:476:00
712.25:475:59
812.25:485:59
912.25:485:58
1012.25:485:57
1112.15:485:56
1212.15:485:55
1312.15:485:55
1412.15:485:54
1512.15:485:53
1612.15:485:52
1712.15:485:52
1812.15:485:51
1912.05:485:50
2012.05:485:49
2112.05:485:49
2212.05:485:48
2312.05:485:47
2412.05:485:46
2512.05:485:45
2611.95:485:45
2711.95:485:44
2811.95:485:43
2911.95:485:42
3011.95:485:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.89 kWh/m².

For context, solar energy here swings from a low near 4.65 kWh/m² to a high of 6.18 kWh/m² in March across the year — September's 4.89 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
154.9Bright
164.9Bright
174.9Bright
184.8Bright
194.8Bright
204.8Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in September

Hazard calendar for Chalatenango

In seasonPeak

In September, Chalatenango sits inside its atlantic hurricane and monsoon season. The full year is below, with each hazard's peak months called out.

Chalatenango sits in the Atlantic hurricane belt; the season peaks August–October.

Chalatenango's monsoon runs May–October, when most of the year's rain falls.

Atlantic hurricane
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Chalatenango?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.9
Sightseeing
10th-best month of the year
4.2
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Chalatenango.

What to pack for Chalatenango in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Chalatenango sees daytime highs around 30°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

UV index in Chalatenango in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Chalatenango peaks around April 11 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 9 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 11UV 14Dec 15UV 9
UV index (midday)Level
Jan10Very high
Feb13Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct12Extreme
Nov10Very high
Dec9Very high

Air quality in Chalatenango in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Chalatenango is worst in April — around 33 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 16 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 2133 µg/m³Dec 1716 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb18Moderate
Mar21Moderate
Apr33Moderate
May31Moderate
Jun21Moderate
Jul23Moderate
Aug20Moderate
Sep19Moderate
Oct18Moderate
Nov16Moderate
Dec16Moderate
Location & terrain

Where is Chalatenango?

Chalatenango sits at 14.0°N, 88.9°W, 400 m above sea level, in El Salvador. The nearest listed city is Suchitoto, 15 km away.

SuchitotoAguilaresSan MartínCojutepequeApopaSensuntepequeIlopangoSoyapango

Topography around Chalatenango

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Chalatenango.

Within 3 km, the terrain around Chalatenango has large variations in elevation — a maximum elevation change of 727 m around an average of 458 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,459 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,817 m.

The land around Chalatenango is covered by trees (50%) and grassland (40%) within 3 km, trees (44%) and grassland (38%) within 16 km, and trees (65%) and grassland (24%) within 80 km.

3 km
727 m
16 km
1,459 m
80 km
2,817 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Suchitoto 15 km · Aguilares 29 km · San Martín 29 km · Cojutepeque 36 km · Apopa 37 km · Sensuntepeque 38 km · Ilopango 42 km · Soyapango 43 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
Roman Catholic 44%Protestant 40%none 16%

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 Chalatenango (14.0414°, -88.9395°, elevation 400 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).