San Bernardino weather in April

In April, San Bernardino sees average daytime highs of 28°C and overnight lows near 19°C, with 142 mm of rain across 8.9 wet days and about 11.4 hours of daylight. It is the 7th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 27°C by the end. The sky is clear or mostly clear about 45% of the time in April, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of April to 11 h 06 min by month's end. Set against the rest of the year, April is San Bernardino's 4th-clearest and 9th-windiest month. For the whole year in context, see San Bernardino's year-round climate.

Daytime high
28°
7th warmest
Overnight low
19°
6th coldest
Rainfall
142 mm
8.9 wet days
Daylight
11 h 24 min
7:07 AM – 6:32 PM
Cloud cover
48%
4th clearest
Wind
11 km/h
9th windiest
Solar energy
4.33 kWh/m²
Travel score
6.2
out of 10

San Bernardino is district of Paraguay.

Density
41/km²
people per km²
Founded
1881

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 30°C in the first days to 27°C by the end.

A typical April day in San Bernardino reaches about 28°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 33°C. Set against its neighbours, April runs about 3°C cooler than March and about 4°C warmer than May.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13020
23020
33020
43020
53020
62920
72920
82920
92920
102920
112919
122919
132919
142919
152819
162819
172819
182819
192819
202819
212818
222818
232718
242718
252718
262718
272718
282718
292717
302617

How April really feels in San Bernardino

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

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

San Bernardino weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 23°12412.913.43.5
Feb32° / 23°14212.312.93.7
Mar31° / 22°10910.312.24.6
Apr28° / 19°1428.911.46.2
May24° / 16°1308.810.87.2
Jun23° / 14°978.310.57.1
Jul23° / 13°827.710.67.4
Aug26° / 15°706.611.17.7
Sep27° / 16°1138.611.86.9
Oct29° / 19°19612.112.65.3
Nov30° / 20°17711.113.24.8
Dec32° / 22°16312.713.53.9

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 13% of April, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15941
25941
35941
45941
55941
66040
76040
86040
96040
105941
115941
125941
135941
146040
156040
165941
175842
185842
195842
205842
215842
225842
235842
245842
255644
265644
275743
285743
295743
305743

Chance of precipitation in April

Any precipitation

San Bernardino gets around 142 mm of rain over 8.9 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 29% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
131
230
330
429
529
629
728
828
928
1027
1127
1227
1327
1428
1528
1629
1729
1830
1930
2031
2131
2231
2331
2431
2531
2630
2730
2830
2929
3029

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 35% of days. Sticky, muggy-or-worse air turns up on roughly 58% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1481936321
2581936321
3581936321
4581935321
5691935311
6791934311
7791834311
8891833301
99101833301
109101833291
1110111833281
1210111833271
1310111833261
1411121933251
1511121934241
1611121934230
1711122034220
1811122035210
1911122135200
2011132136190
2111132236180
2212132237170
2312132237160
2412132337150
2513142337140
2614142336130
2715142336120
2816152335110
2917152335100
301815233490

Wind in April

Winds average 11 km/h in April.

Across April, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 11 h 48 min at the start of April to 11 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over April. Sunrise moves from 7:01 AM to 7:14 AM, and sunset from 6:47 PM to 6:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.87:016:47
211.87:016:46
311.77:016:45
411.77:026:44
511.77:026:43
611.77:036:42
711.67:036:41
811.67:046:40
911.67:046:39
1011.67:046:38
1111.57:056:37
1211.57:056:36
1311.57:066:35
1411.57:066:34
1511.47:076:33
1611.47:076:32
1711.47:086:31
1811.47:086:30
1911.37:096:29
2011.37:096:28
2111.37:106:27
2211.37:106:26
2311.27:116:25
2411.27:116:24
2511.27:116:23
2611.27:126:22
2711.27:126:22
2811.17:136:21
2911.17:136:20
3011.17:146:19

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.33 kWh/m².

For context, solar energy here swings from a low near 2.8 kWh/m² to a high of 6.7 kWh/m² in December across the year — April's 4.33 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.7Bright
54.7Bright
64.7Bright
74.6Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.5Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.2Bright
214.1Bright
224.1Bright
234.0Bright
244.0Bright
254.0Moderate
264.0Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.8Moderate
Planning a trip in April

Is April a good time to visit San Bernardino?

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

6.2
Sightseeing
6th-best month of the year
7.1
Beach & pool
1st-best month of the year

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

What to pack for San Bernardino in April

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

In April, San Bernardino sees daytime highs around 28°C and nights near 19°C. Pack light clothes. Worth having: rain gear. About 9 days see rain.

light clothesrain gear

UV index in San Bernardino in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 9 (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 Bernardino peaks around January 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 15 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 17UV 15Jul 15UV 5
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar11Extreme
Apr9Very high
May6High
Jun5Moderate
Jul5Moderate
Aug5High
Sep8Very high
Oct8Very high
Nov12Extreme
Dec13Extreme

Air quality in San Bernardino 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 Bernardino is worst in September — around 28 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodSep 1227 µg/m³Dec 1910 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Moderate
Mar11Good
Apr13Moderate
May13Moderate
Jun15Moderate
Jul17Moderate
Aug25Moderate
Sep28Moderate
Oct18Moderate
Nov13Moderate
Dec10Good
Location & terrain

Where is San Bernardino?

San Bernardino sits at 25.3°S, 57.3°W, 0 m above sea level, in Paraguay. The nearest listed city is Areguá, 9.0 km away.

Topography around San Bernardino

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

Within 3 km, the terrain around San Bernardino has only modest variations in elevation — a maximum elevation change of 183 m around an average of 91 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 272 m; within 80 km, significant variations in elevation — a maximum elevation change of 529 m.

The land around San Bernardino is covered by trees (51%) and water (42%) within 3 km, trees (72%) within 16 km, and grassland (52%) and trees (39%) within 80 km.

3 km
183 m
16 km
272 m
80 km
529 m
treesgrasslandcroplandartificial surfaceswaterwetland
April weather nearby: Areguá 9.0 km · Itauguá 11 km · Capiatá 16 km · Caacupé 18 km · San Lorenzo 22 km · Itá 22 km · Fernando de la Mora 23 km · Limpio 25 km

Paraguay travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C / N
220 V · 50 Hz
Prices
≈ 35% of US
price level, 2025
GDP per capita
$7,027
2025
Happiness
6.2 / 10
World Happiness, 2025
Safe drinking water
64%
of population, 2024
Homicide rate
6.8
per 100k, 2023
Road deaths
22
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 531
Religion
Roman Catholic 80%Protestant 7%Believer 6%other 1%

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 Bernardino (-25.3107°, -57.2963°, elevation 0 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).