San Juan weather in April

In April, San Juan sees average daytime highs of 88°F and overnight lows near 68°F, with 1.7 in of rain across 5.3 wet days and about 12.6 hours of daylight. It is the 6th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 86°F in the first days to 90°F by the end. The sky is clear or mostly clear about 41% of the time in April, and the air most often feels muggy.

Daylight stretches from about 12 h 12 min at the start of April to 13 hours by month's end. Set against the rest of the year, April is San Juan's 7th-clearest and 3rd-windiest month. For the whole year in context, see San Juan's year-round climate.

Daytime high
88°
6th warmest
Overnight low
68°
6th coldest
Rainfall
1.7 in
5.3 wet days
Daylight
12 h 36 min
6:14 AM – 6:51 PM
Cloud cover
51%
7th clearest
Wind
12 mph
3rd windiest
Solar energy
5.84 kWh/m²
Travel score
5.0
out of 10

San Juan is city in Hidalgo County, Texas, United States.

Density
1,233/km²
people per km²

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 86°F in the first days to 90°F by the end.

A typical April day in San Juan reaches about 88°F in the afternoon and slips back to 68°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 78°F and 97°F. Set against its neighbours, April runs about 6°F warmer than March and about 5°F cooler than May.

60°80°100°151015202530
Avg high (°F)Avg low (°F)
18565
28565
38665
48666
58666
68666
78666
88766
98766
108766
118767
128767
138767
148767
158867
168868
178868
188868
198868
208969
218969
228969
238969
248969
259069
269070
279070
289070
299070
309171

How April really feels in San Juan

Once humidity and wind are folded in, April averages 12 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
12
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

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

San Juan weather by month

How April compares with the rest of the year at a glance. April is the 6th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan72° / 52°1.04.410.57.5
Feb76° / 56°0.94.411.17.7
Mar82° / 62°1.45.211.86.8
Apr88° / 68°1.75.312.65.0
May92° / 73°2.26.613.33.5
Jun96° / 77°2.07.113.62.4
Jul98° / 78°2.15.813.52.0
Aug98° / 78°1.66.812.91.8
Sep93° / 75°3.511.812.23.1
Oct87° / 68°2.36.711.45.2
Nov79° / 60°1.45.310.77.5
Dec73° / 54°1.25.110.47.6

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 15% of April, with mostly cloudy or overcast conditions the remaining 45%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25347
35347
45347
55347
65347
75347
85347
95446
105446
115446
125446
135446
145446
155446
165446
175446
185545
195545
205644
215644
225644
235743
245743
255842
265941
275941
286040
295941
305941

Chance of precipitation in April

Any precipitation

San Juan gets around 1.7 in of rain over 5.3 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 17% and peaks near 18% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
116
217
317
417
517
618
718
818
918
1018
1118
1218
1317
1417
1517
1617
1717
1817
1917
2017
2117
2217
2317
2417
2517
2617
2717
2817
2917
3017

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the muggy band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 57% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12112203790
221121937100
321121937100
421121937110
521121936120
621121936120
721111936130
821111836130
921111836140
1020111836140
1120101837150
1219101837150
1319101838160
1418101838170
1517101738170
161691739180
171691739191
181591639201
191491638211
201391638221
211391638231
221291638241
231291537251
241291537271
251281436281
261181436301
271181335321
281181333331
291181332351
301081331371

Wind in April

Winds average 12 mph in April.

Across April, daily wind ranges from about 12 mph on the calmest days to 12 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 12 min at the start of April to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over April. Sunrise moves from 6:30 AM to 6:01 AM, and sunset from 6:44 PM to 6:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:306:44
212.36:296:45
312.36:286:45
412.36:276:46
512.36:266:46
612.46:256:47
712.46:246:47
812.46:236:48
912.46:226:48
1012.56:216:48
1112.56:196:49
1212.56:186:49
1312.56:176:50
1412.66:166:50
1512.66:156:51
1612.66:146:51
1712.66:136:52
1812.76:126:52
1912.76:116:53
2012.76:106:53
2112.76:096:54
2212.86:086:54
2312.86:086:55
2412.86:076:55
2512.86:066:56
2612.96:056:56
2712.96:046:57
2812.96:036:57
2912.96:026:58
3013.06:016:59

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.84 kWh/m².

For context, solar energy here swings from a low near 3.06 kWh/m² to a high of 6.78 kWh/m² in July across the year — April's 5.84 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.5Bright
45.5Bright
55.5Bright
65.6Bright
75.6Bright
85.7Bright
95.7Bright
105.7Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
216.0Bright
226.0Bright
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in April

Is April a good time to visit San Juan?

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

5.0
Sightseeing
7th-best month of the year
7.4
Beach & pool
2nd-best month of the year

April is a reasonable time to visit San Juan for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for San Juan in April

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

In April, San Juan sees daytime highs around 88°F and nights near 68°F. Pack light clothes. Worth having: sun protection. About 5 days see rain.

light clothessun protection

UV index in San Juan in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 11 (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 Juan peaks around June 21 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highExtremeVery highHighJun 21UV 12Dec 22UV 5
UV index (midday)Level
Jan5Moderate
Feb7High
Mar8Very high
Apr11Extreme
May9Very high
Jun12Extreme
Jul11Extreme
Aug11Extreme
Sep10Very high
Oct8Very high
Nov6High
Dec5Moderate

Air quality in San Juan in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in San Juan is worst in July — around 26 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (November, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1625 µg/m³Nov 107 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar11Good
Apr13Moderate
May20Moderate
Jun21Moderate
Jul26Moderate
Aug19Moderate
Sep12Moderate
Oct8Good
Nov7Good
Dec9Good
Location & terrain

Where is San Juan?

San Juan sits at 26.2°N, 98.2°W, 108 ft above sea level, in United States. The nearest listed city is Pharr, 1.9 mi away.

Topography around San Juan

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of San Juan.

Within 2 miles, the terrain around San Juan has only modest variations in elevation — a maximum elevation change of 52 ft around an average of 108 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 167 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,027 ft.

The land around San Juan is covered by artificial surfaces (49%) and trees (24%) within 2 miles, cropland (31%), artificial surfaces (25%) and trees (22%) within 10 miles, and cropland (38%) and grassland (24%) within 50 miles.

2 miles
52 ft
10 miles
167 ft
50 miles
1,027 ft
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
April weather nearby: Pharr 1.9 mi · Alamo 1.9 mi · McAllen 5.0 mi · Donna 6.8 mi · Edinburg 8.1 mi · Weslaco 11 mi · Mission 11 mi · Reynosa 11 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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 Juan (26.1892°, -98.1553°, elevation 108 ft), 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).