San Miguel weather in May

In May, San Miguel sees average daytime highs of 33°C and overnight lows near 24°C, with 258 mm of rain across 22.8 wet days and about 12.6 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 35°C in the first days to 32°C by the end. The sky is clear or mostly clear about 15% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 30 min at the start of May to 12 h 42 min by month's end. Set against the rest of the year, May is San Miguel's 9th-clearest and 8th-windiest month. For the whole year in context, see San Miguel's year-round climate.

Daytime high
33°
5th warmest
Overnight low
24°
11th coldest
Rainfall
258 mm
22.8 wet days
Daylight
12 h 36 min
5:30 AM – 6:08 PM
Cloud cover
71%
9th clearest
Wind
4 km/h
8th windiest
Solar energy
6.02 kWh/m²
Travel score
2.3
out of 10

San Miguel is city in El Salvador.

Density
416/km²
people per km²
Founded
1530

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 35°C in the first days to 32°C by the end.

A typical May day in San Miguel reaches about 33°C in the afternoon and slips back to 24°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 36°C. Set against its neighbours, May runs about 2°C cooler than April and about 1°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13524
23524
33524
43524
53524
63424
73424
83424
93424
103424
113424
123424
133424
143424
153424
163324
173324
183324
193324
203324
213324
223324
233224
243224
253223
263223
273223
283223
293223
303223
313223

How May really feels in San Miguel

Once humidity and wind are folded in, May averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

San Miguel weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan34° / 21°10.411.34.1
Feb35° / 22°10.311.63.3
Mar36° / 23°92.111.92.8
Apr35° / 24°449.212.32.4
May33° / 24°25822.812.62.3
Jun32° / 23°29123.612.82.6
Jul33° / 23°19518.912.72.8
Aug33° / 23°27122.512.42.6
Sep31° / 23°34326.712.12.6
Oct31° / 22°3042411.73.1
Nov31° / 21°618.811.44.5
Dec33° / 21°61.311.24.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 69%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25149
35050
44951
54852
64753
74654
84456
94357
104159
114060
123862
133565
143367
153169
162872
172872
182575
192476
202377
212278
222080
232080
241882
251882
261882
271783
281585
291585
301585
311585

Chance of precipitation in May

Any precipitation

San Miguel gets around 258 mm of rain over 22.8 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 73% and peaks near 87% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
155
256
358
459
560
661
762
863
964
1065
1166
1267
1368
1470
1571
1673
1774
1876
1978
2079
2180
2281
2382
2483
2584
2685
2786
2886
2987
3087
3187

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 78% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12822662
22821672
32720692
41719703
51718713
61618723
71617724
81617724
91616734
101516735
111515745
121415755
131414756
141413766
151313776
161312777
171211797
181210798
191110808
20119818
21118819
22117829
23106849
24105859
25104869
260048610
270038710
280038611
290028711
300028612
310018712

Wind in May

Winds average 4 km/h in May.

Across May, 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.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 30 min at the start of May to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over May. Sunrise moves from 5:36 AM to 5:28 AM, and sunset from 6:04 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:366:04
212.55:356:04
312.55:356:05
412.55:346:05
512.55:346:05
612.55:346:05
712.55:336:05
812.55:336:06
912.65:326:06
1012.65:326:06
1112.65:326:06
1212.65:316:07
1312.65:316:07
1412.65:316:07
1512.65:316:07
1612.65:306:08
1712.65:306:08
1812.65:306:08
1912.65:306:08
2012.75:296:09
2112.75:296:09
2212.75:296:09
2312.75:296:10
2412.75:296:10
2512.75:296:10
2612.75:296:10
2712.75:286:11
2812.75:286:11
2912.75:286:11
3012.75:286:12
3112.75:286:12

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.02 kWh/m².

For context, solar energy here swings from a low near 5.17 kWh/m² to a high of 6.68 kWh/m² in March across the year — May's 6.02 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.4Intense
36.4Intense
46.4Intense
56.4Intense
66.4Intense
76.4Intense
86.4Intense
96.3Intense
106.3Intense
116.3Intense
126.2Intense
136.2Intense
146.2Intense
156.1Intense
166.1Intense
176.0Intense
186.0Bright
195.9Bright
205.9Bright
215.8Bright
225.8Bright
235.8Bright
245.7Bright
255.7Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
315.6Bright
Planning a trip in May

Hazard calendar for San Miguel

In seasonPeak

In May, San Miguel sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

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

San Miguel'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 May a good time to visit San Miguel?

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

2.3
Sightseeing
12th-best month of the year
4.3
Beach & pool
10th-best month of the year

May is a weaker month for outdoor sightseeing in San Miguel.

What to pack for San Miguel in May

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

In May, San Miguel sees daytime highs around 33°C and nights near 24°C. Pack light clothes, rain gear and sun protection. About 23 days see rain.

light clothesrain gearsun protection

Sea temperature near San Miguel in May

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

The sea at the nearest coast (about 40 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
Jan28Warm
Feb28Warm
Mar28Tropical
Apr29Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in San Miguel in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Miguel peaks around April 10 at about 13 (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 10UV 13Dec 15UV 9
UV index (midday)Level
Jan10Extreme
Feb12Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov10Very high
Dec9Very high

Air quality in San Miguel in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in San Miguel 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 Miguel?

San Miguel sits at 13.5°N, 88.2°W, 130 m above sea level, in El Salvador. The nearest listed city is San Rafael Oriente, 21 km away.

San Rafael OrienteSan Francisco GoteraSantiago de MaríaUsulutánLa UniónPuerto El TriunfoColomoncaguaLangue

Topography around San Miguel

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

Within 3 km, the terrain around San Miguel has only modest variations in elevation — a maximum elevation change of 126 m around an average of 128 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,078 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,174 m.

The land around San Miguel is covered by artificial surfaces (48%) and trees (36%) within 3 km, trees (51%) and grassland (38%) within 16 km, and trees (45%), water (28%) and grassland (20%) within 80 km.

3 km
126 m
16 km
2,078 m
80 km
2,174 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves
May weather nearby: San Rafael Oriente 21 km · San Francisco Gotera 25 km · Santiago de María 31 km · Usulután 32 km · La Unión 40 km · Puerto El Triunfo 46 km · Colomoncagua 53 km · Langue 59 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 Miguel (13.4826°, -88.1821°, elevation 130 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).