Metapán weather in September

In September, Metapán sees average daytime highs of 31°C and overnight lows near 21°C, with 152 mm of rain across 20.5 wet days and about 12.1 hours of daylight. It is the 8th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 4% 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 Metapán's 11th-clearest and 12th-windiest month. For the whole year in context, see Metapán's year-round climate.

Daytime high
31°
8th warmest
Overnight low
21°
8th coldest
Rainfall
152 mm
20.5 wet days
Daylight
12 h 06 min
5:50 AM – 5:54 PM
Cloud cover
80%
11th clearest
Wind
5 km/h
12th windiest
Solar energy
4.89 kWh/m²
Travel score
3.4
out of 10

Metapán is district in Northern Santa Ana, El Salvador.

Density
29/km²
people per km²

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 31°C through the month.

A typical September day in Metapán reaches about 31°C in the afternoon and slips back to 21°C overnight — a 10°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 about 1°C warmer than October.

15°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
163121
173121
183021
193021
203021
213021
223021
233021
243021
253021
263021
273021
283021
293021
303021

How September really feels in Metapán

Once humidity and wind are folded in, September averages 20 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
20
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.

Metapán weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 18°00.111.26.9
Feb31° / 19°00.111.55.9
Mar32° / 20°20.611.94.9
Apr33° / 21°174.112.33.9
May32° / 22°9014.612.73.4
Jun31° / 21°11218.712.83.5
Jul31° / 21°7714.412.83.8
Aug31° / 21°8716.912.53.5
Sep31° / 21°15220.512.13.4
Oct30° / 21°12215.411.74.4
Nov29° / 20°223.511.36.2
Dec30° / 19°30.611.26.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 83%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12278
22179
32080
42080
51981
61981
71981
81981
91882
101882
111882
121882
131783
141783
151783
161783
171684
181684
191684
201684
211684
221585
231585
241585
251684
261684
271684
281684
291783
301882

Chance of precipitation in September

Any precipitation

Metapán gets around 152 mm of rain over 20.5 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 67% and peaks near 75% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
162
262
362
462
561
661
761
861
961
1062
1162
1263
1364
1464
1565
1667
1768
1869
1970
2072
2173
2274
2375
2475
2575
2675
2775
2874
2973
3072

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 93% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
17921
27921
37921
47921
56931
66931
76931
86922
96922
105932
115932
125932
135932
145923
154933
164933
174933
184933
193934
203934
213934
222944
232944
242944
252944
262935
272935
282935
292935
303925

Wind in September

Winds average 5 km/h in September, the calmest month.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 5:49 AM to 5:51 AM, and sunset from 6:06 PM to 5:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:496:06
212.35:496:05
312.35:496:04
412.25:496:04
512.25:496:03
612.25:496:02
712.25:496:01
812.25:496:01
912.25:496:00
1012.25:505:59
1112.15:505:58
1212.15:505:58
1312.15:505:57
1412.15:505:56
1512.15:505:55
1612.15:505:54
1712.15:505:54
1812.15:505:53
1912.05:505:52
2012.05:505:51
2112.05:505:51
2212.05:505:50
2312.05:505:49
2412.05:505:48
2512.05:505:47
2611.95:505:47
2711.95:505:46
2811.95:505:45
2911.95:505:44
3011.95:515:44

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 4.63 kWh/m² to a high of 6.22 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
75.2Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
164.9Bright
174.9Bright
184.9Bright
194.8Bright
204.8Bright
214.8Bright
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 Metapán

In seasonPeak

In September, Metapán sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Metapán's rainy season runs May–October, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Metapán?

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

3.4
Sightseeing
11th-best month of the year
4.9
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Metapán.

What to pack for Metapán in September

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

In September, Metapán sees daytime highs around 31°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Metapán in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Metapán peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 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 12UV 14Dec 13UV 9
UV index (midday)Level
Jan10Very high
Feb13Extreme
Mar14Extreme
Apr14Extreme
May12Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov9Very high
Dec9Very high

Air quality in Metapán 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 Metapán 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 Metapán?

Metapán sits at 14.3°N, 89.5°W, 471 m above sea level, in El Salvador. The nearest listed city is Esquipulas, 28 km away.

EsquipulasAsunción MitaSanta AnaChalchuapaJutiapaAguilares

Topography around Metapán

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

Within 3 km, the terrain around Metapán has only modest variations in elevation — a maximum elevation change of 230 m around an average of 520 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,059 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,620 m.

The land around Metapán is covered by grassland (46%) and trees (32%) within 3 km, trees (46%) and grassland (31%) within 16 km, and trees (62%) and grassland (24%) within 80 km.

3 km
230 m
16 km
2,059 m
80 km
2,620 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Esquipulas 28 km · Asunción Mita 28 km · Santa Ana 40 km · San Luis Jilotepeque 46 km · Chalchuapa 46 km · Jutiapa 47 km · Aguilares 50 km · Chiquimula 53 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 Metapán (14.3333°, -89.45°, elevation 471 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. 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).