San Vicente weather in September

In September, San Vicente sees average daytime highs of 30°C and overnight lows near 22°C, with 294 mm of rain across 27.4 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 oppressive.

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 San Vicente's 11th-clearest and 12th-windiest month. For the whole year in context, see San Vicente's year-round climate.

Daytime high
30°
11th warmest
Overnight low
22°
7th coldest
Rainfall
294 mm
27.4 wet days
Daylight
12 h 06 min
5:47 AM – 5:52 PM
Cloud cover
80%
11th clearest
Wind
4 km/h
12th windiest
Solar energy
5.18 kWh/m²
Travel score
2.7
out of 10

San Vicente is city in El Salvador.

Density
155/km²
people per km²
Founded
1635

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 San Vicente reaches about 30°C in the afternoon and slips back to 22°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)
13122
23122
33122
43122
53122
63122
73122
83122
93122
103122
113122
123122
133122
143122
153022
163022
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022

How September really feels in San Vicente

Once humidity and wind are folded in, September averages 30 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
30
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.

San Vicente 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
Jan33° / 20°30.711.34.7
Feb34° / 21°30.911.54.0
Mar34° / 21°133.811.93.5
Apr34° / 22°5912.112.33.1
May32° / 23°26125.412.62.6
Jun31° / 22°25825.512.82.8
Jul32° / 22°17320.312.73.0
Aug32° / 22°2282412.52.8
Sep30° / 22°29427.412.12.7
Oct30° / 22°25523.611.73.4
Nov31° / 21°518.911.44.6
Dec32° / 20°81.711.25.0

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 11% of September, with mostly cloudy or overcast conditions the remaining 83%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12179
22179
32080
41981
51981
61981
71981
81882
91882
101882
111882
121882
131882
141882
151882
161882
171783
181783
191684
201684
211684
221585
231585
241585
251585
261585
271585
281882
291882
301882

Chance of precipitation in September

Any precipitation

San Vicente gets around 294 mm of rain over 27.4 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 91% and peaks near 93% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
187
288
388
488
588
689
789
889
989
1089
1189
1290
1390
1490
1590
1691
1791
1892
1992
2092
2193
2293
2393
2493
2593
2693
2792
2892
2992
3091

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 86% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)
12179
22080
31981
41981
51882
61882
71882
81783
91783
101783
111783
121684
131684
141585
151585
161486
171387
181387
191288
201288
211189
221189
231090
241090
251090
261090
271090
281189
291189
301189

Wind in September

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

Across September, daily wind ranges from about 4 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
214calm
224calm
234calm
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 6:03 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:476:03
212.35:476:02
312.25:476:01
412.25:476:01
512.25:476:00
612.25:475:59
712.25:475:59
812.25:475:58
912.25:475:57
1012.25:475:56
1112.15:475:56
1212.15:475:55
1312.15:475:54
1412.15:475:53
1512.15:475:52
1612.15:475:52
1712.15:475:51
1812.05:475:50
1912.05:475:49
2012.05:475:49
2112.05:475:48
2212.05:475:47
2312.05:475:46
2412.05:475:46
2512.05:475:45
2611.95:475:44
2711.95:485:43
2811.95:485:43
2911.95:485:42
3011.95:485:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.18 kWh/m².

For context, solar energy here swings from a low near 4.87 kWh/m² to a high of 6.36 kWh/m² in March across the year — September's 5.18 kWh/m² sits near the bottom.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.4Bright
95.4Bright
105.4Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.2Bright
165.2Bright
175.2Bright
185.1Bright
195.1Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for San Vicente

In seasonPeak

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

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

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

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

Is September a good time to visit San Vicente?

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

2.7
Sightseeing
11th-best month of the year
3.9
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in San Vicente.

What to pack for San Vicente in September

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

In September, San Vicente sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near San Vicente in September

The nearest coast averages about 30°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 47 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.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb28Tropical
Mar29Tropical
Apr29Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in San Vicente 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 San Vicente peaks around April 10 at about 13 (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 10UV 13Dec 13UV 9
UV index (midday)Level
Jan10Very high
Feb13Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec9Very high

Air quality in San Vicente 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 San Vicente is worst in April — around 34 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (January, 13 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 2234 µg/m³Jan 1113 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb15Moderate
Mar22Moderate
Apr34Moderate
May32Moderate
Jun21Moderate
Jul25Moderate
Aug20Moderate
Sep18Moderate
Oct17Moderate
Nov16Moderate
Dec13Moderate
Location & terrain

Where is San Vicente?

San Vicente sits at 13.6°N, 88.8°W, 405 m above sea level, in El Salvador. The nearest listed city is Zacatecoluca, 17 km away.

ZacatecolucaCojutepequeSan MartínSensuntepequeIlopangoSantiago de MaríaSoyapangoSuchitoto

Topography around San Vicente

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

Within 3 km, the terrain around San Vicente has significant variations in elevation — a maximum elevation change of 461 m around an average of 464 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,150 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,483 m.

The land around San Vicente is covered by trees (40%) and grassland (36%) within 3 km, trees (55%) and grassland (35%) within 16 km, and trees (48%), grassland (22%) and water (22%) within 80 km.

3 km
461 m
16 km
2,150 m
80 km
2,483 m
treesshrubsgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Zacatecoluca 17 km · Cojutepeque 18 km · San Martín 21 km · Sensuntepeque 31 km · Ilopango 36 km · Santiago de María 39 km · Soyapango 39 km · Suchitoto 42 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 San Vicente (13.6411°, -88.7846°, elevation 405 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). 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).