Santa Ana weather in September

In September, Santa Ana sees average daytime highs of 30°C and overnight lows near 21°C, with 213 mm of rain across 25.7 wet days and about 12.1 hours of daylight. It is the 10th-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 5% 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 Santa Ana's 11th-clearest and 12th-windiest month. For the whole year in context, see Santa Ana's year-round climate.

Daytime high
30°
10th warmest
Overnight low
21°
7th coldest
Rainfall
213 mm
25.7 wet days
Daylight
12 h 06 min
5:50 AM – 5:55 PM
Cloud cover
81%
11th clearest
Wind
4 km/h
12th windiest
Solar energy
4.88 kWh/m²
Travel score
3.1
out of 10

Santa Ana is city in El Salvador.

Density
442/km²
people per km²
Founded
1569

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 Santa Ana 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 27°C and 33°C. Set against its neighbours, September runs about 1°C cooler than August and on par with October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13121
23121
33121
43021
53021
63021
73021
83021
93021
103021
113021
123021
133021
143021
153021
163021
173021
183021
193021
203021
213021
222921
232921
242921
252921
262921
272921
282921
292921
302921

How September really feels in Santa Ana

Once humidity and wind are folded in, September averages 8 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
8
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.

Santa Ana weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 18°20.411.36.5
Feb31° / 19°10.311.55.7
Mar32° / 20°61.611.94.9
Apr33° / 21°317.212.33.9
May31° / 21°13920.512.63.2
Jun30° / 21°18624.112.83.2
Jul31° / 21°9715.812.73.7
Aug31° / 21°12220.212.53.3
Sep30° / 21°21325.712.13.1
Oct29° / 20°15718.611.74.2
Nov30° / 19°274.311.45.9
Dec30° / 19°61.111.26.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% 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 84%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12080
21981
31882
41882
51882
61783
71783
81684
91684
101684
111684
121585
131585
141585
151585
161585
171486
181486
191486
201486
211486
221486
231486
241486
251486
261585
271585
281585
291684
301783

Chance of precipitation in September

Any precipitation

Santa Ana gets around 213 mm of rain over 25.7 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 84% and peaks near 89% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
180
280
381
481
581
681
782
882
982
1082
1182
1283
1383
1484
1584
1685
1785
1886
1987
2088
2188
2289
2389
2489
2588
2688
2787
2886
2985
3084

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 84% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
110846
29847
38857
48857
57867
67867
77858
87858
96868
106859
116859
1268410
1358411
1458411
1558312
1658312
1748313
1848313
1948214
2038314
2138215
2238215
2338215
2428315
2528315
2628315
2738314
2838314
2938314
3038314

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 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
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
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 5:50 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)
112.35:506:06
212.35:506:05
312.25:506:05
412.25:506:04
512.25:506:03
612.25:506:02
712.25:506:02
812.25:506:01
912.25:506:00
1012.25:505:59
1112.15:505:59
1212.15:505:58
1312.15:505:57
1412.15:505:56
1512.15:505:56
1612.15:505:55
1712.15:505:54
1812.15:505:53
1912.05:505:53
2012.05:505:52
2112.05:505:51
2212.05:505:50
2312.05:505:49
2412.05:515:49
2512.05:515:48
2611.95:515:47
2711.95:515:46
2811.95:515:46
2911.95:515:45
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 4.88 kWh/m².

For context, solar energy here swings from a low near 4.7 kWh/m² to a high of 6.27 kWh/m² in March across the year — September's 4.88 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
115.1Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
164.9Bright
174.9Bright
184.8Bright
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 Santa Ana

In seasonPeak

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

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

Santa Ana'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 Santa Ana?

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

3.1
Sightseeing
12th-best month of the year
4.2
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Santa Ana.

What to pack for Santa Ana in September

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

In September, Santa Ana 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

Sea temperature near Santa Ana 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 53 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
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Santa Ana 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 Santa Ana 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 13UV 14Nov 23UV 9
UV index (midday)Level
Jan10Very high
Feb13Extreme
Mar13Extreme
Apr14Extreme
May12Extreme
Jun13Extreme
Jul13Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec9Very high

Air quality in Santa Ana 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 Santa Ana 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 Santa Ana?

Santa Ana sits at 14.0°N, 89.6°W, 645 m above sea level, in El Salvador. The nearest listed city is Chalchuapa, 13 km away.

IzalcoAhuachapanSonzacateSonsonateQuezaltepequeAguilaresMetapán

Topography around Santa Ana

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

Within 3 km, the terrain around Santa Ana has significant variations in elevation — a maximum elevation change of 387 m around an average of 683 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,989 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,703 m.

The land around Santa Ana is covered by trees (55%) and artificial surfaces (37%) within 3 km, trees (64%) and grassland (20%) within 16 km, and trees (52%) and grassland (23%) within 80 km.

3 km
387 m
16 km
1,989 m
80 km
2,703 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Chalchuapa 13 km · Izalco 30 km · Ahuachapan 32 km · Sonzacate 33 km · Sonsonate 35 km · Quezaltepeque 35 km · Aguilares 40 km · Metapán 40 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 Santa Ana (13.9883°, -89.5568°, elevation 645 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).