San Jose weather in April

In April, San Jose sees average daytime highs of 23°C and overnight lows near 15°C, with 102 mm of rain across 18 wet days and about 12.2 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 9% of the time in April, and the air most often feels comfortable.

Daylight stretches from about 12 h 06 min at the start of April to 12 h 18 min by month's end. Set against the rest of the year, April is San Jose's 5th-clearest and 5th-windiest month. For the whole year in context, see San Jose's year-round climate.

Daytime high
23°
1st warmest
Overnight low
15°
5th coldest
Rainfall
102 mm
18 wet days
Daylight
12 h 12 min
5:30 AM – 5:43 PM
Cloud cover
75%
5th clearest
Wind
6 km/h
5th windiest
Solar energy
5.56 kWh/m²
Travel score
5.3
out of 10

San Jose is capital of Costa Rica.

Air quality
Good
PM2.5 7.4 µg/m³ · 2019
Density
7,508/km²
people per km²
Founded
1737

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 23°C through the month.

A typical April day in San Jose reaches about 23°C in the afternoon and slips back to 15°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 25°C. Set against its neighbours, April runs about 1°C warmer than March and on par with May.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12315
22315
32315
42315
52315
62315
72315
82315
92315
102315
112315
122315
132315
142315
152315
162315
172315
182315
192315
202316
212316
222316
232316
242316
252316
262316
272316
282316
292316
302316

San Jose weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan21° / 14°10413.311.56.0
Feb22° / 14°6811.911.76.2
Mar23° / 14°6513.911.96.1
Apr23° / 15°1021812.25.3
May23° / 16°35727.812.43.8
Jun23° / 16°38528.812.63.5
Jul23° / 16°29328.212.53.7
Aug23° / 16°34528.512.33.7
Sep23° / 16°39129.112.13.5
Oct22° / 16°43030.111.83.4
Nov22° / 15°31225.511.54.0
Dec21° / 15°17017.811.45.3

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% 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 76%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13862
23862
33664
43664
53565
63565
73466
83367
93169
103070
112971
122872
132773
142674
152476
162377
172278
182278
192179
202080
211882
221783
231684
241585
251486
261387
271288
281189
291090
30991

Chance of precipitation in April

Any precipitation

San Jose gets around 102 mm of rain over 18 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 60% and peaks near 77% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
148
248
348
449
549
650
750
851
952
1053
1155
1256
1357
1458
1559
1660
1761
1863
1964
2065
2166
2268
2369
2470
2571
2672
2773
2874
2976
3077

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the comfortable band about 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11562230
21561240
31560250
41559260
51459270
61458280
71457290
81357300
91356310
101256320
111256320
121156330
131155340
141055350
15955360
16954370
17852391
18851401
19751411
20649431
21648451
22547471
23545482
24443512
25442522
26440542
27339562
28337582
29236602
30234622

Wind in April

Winds average 6 km/h in April.

Across April, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 06 min at the start of April to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over April. Sunrise moves from 5:39 AM to 5:24 AM, and sunset from 5:43 PM to 5:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:395:43
212.15:385:43
312.15:375:43
412.15:375:43
512.15:365:43
612.15:365:43
712.15:355:43
812.15:345:43
912.25:345:43
1012.25:335:43
1112.25:335:43
1212.25:325:43
1312.25:325:43
1412.25:315:43
1512.25:315:43
1612.25:305:43
1712.25:295:43
1812.25:295:43
1912.25:285:43
2012.35:285:43
2112.35:275:43
2212.35:275:43
2312.35:275:43
2412.35:265:43
2512.35:265:43
2612.35:255:44
2712.35:255:44
2812.35:245:44
2912.35:245:44
3012.35:245:44

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.56 kWh/m².

For context, solar energy here swings from a low near 3.58 kWh/m² to a high of 5.78 kWh/m² in March across the year — April's 5.56 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.7Bright
125.7Bright
135.7Bright
145.6Bright
155.6Bright
165.6Bright
175.5Bright
185.5Bright
195.5Bright
205.4Bright
215.4Bright
225.3Bright
235.3Bright
245.3Bright
255.2Bright
265.2Bright
275.1Bright
285.1Bright
295.0Bright
305.0Bright
Planning a trip in April

Is April a good time to visit San Jose?

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

5.3
Sightseeing
4th-best month of the year
4.2
Beach & pool
2nd-best month of the year

April is a reasonable time to visit San Jose for sightseeing.

What to pack for San Jose in April

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

In April, San Jose sees daytime highs around 23°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 18 days see rain.

rain gearlight clothessun protection

Sea temperature near San Jose in April

The nearest coast averages about 29°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 60 km away) is warmest in April at about 29°C and coldest in November near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct28Tropical
Nov28Warm
Dec28Tropical

UV index in San Jose in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 14 (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 Jose peaks around March 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 19UV 15Dec 16UV 10
UV index (midday)Level
Jan12Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov12Extreme
Dec10Extreme
Location & terrain

Where is San Jose?

San Jose sits at 9.9°N, 84.1°W, 1,133 m above sea level, in Costa Rica. The nearest listed city is Calle Blancos, 2.0 km away.

Topography around San Jose

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

Within 3 km, the terrain around San Jose has only modest variations in elevation — a maximum elevation change of 153 m around an average of 1,139 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,702 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,722 m.

The land around San Jose is covered by artificial surfaces (84%) within 3 km, trees (57%) and artificial surfaces (27%) within 16 km, and trees (70%) within 80 km.

3 km
153 m
16 km
1,702 m
80 km
3,722 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Calle Blancos 2.0 km · Colima 2.0 km · San Juan 3.0 km · Guadalupe 3.0 km · San Pedro 4.0 km · San Felipe 4.0 km · San Vicente 5.0 km · San Vicente de Moravia 5.0 km

Costa Rica travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 59% of US
price level, 2025
GDP per capita
$19,970
2025
Happiness
7.4 / 10
World Happiness, 2025
Safe drinking water
81%
of population, 2024
Homicide rate
17.7
per 100k, 2023
Road deaths
14.8
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 516
Religion
Roman Catholic 48%none 27%Evangelical and Pentecostal 20%other 3%

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 Jose (9.9339°, -84.0849°, elevation 1,133 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).