San José weather in April

In April, San José sees average daytime highs of 28°C and overnight lows near 23°C, with 63 mm of rain across 18.1 wet days and about 12.2 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 43% of the time in April, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of April to 12 h 24 min by month's end. Set against the rest of the year, April is San José's 4th-clearest and 5th-windiest month. For the whole year in context, see San José's year-round climate.

Daytime high: 28°; 1st warmest
Overnight low: 23°; 10th coldest
Rainfall: 63 mm; 18.1 wet days
Daylight: 12 h 12 min; 5:33 AM – 5:48 PM
Cloud cover: 51%; 4th clearest
Wind: 17 km/h; 5th windiest
Solar energy: 6.04 kWh/m²
Travel score: 4.8; out of 10

San José is populated place in Upala district of Costa Rico.

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

← March San José year-round climate May →Best places to visit in April

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical April day in San José reaches about 28°C in the afternoon and slips back to 23°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, April runs about 1°C warmer than March and on par with May.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	28	28	28	28	28	28	28	28	28	28	28	29	29	29	29	29	29	29	29	29	29	29	29	29	29	28	28	28	28	28
Avg low (°C)	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	24	24	24	24	24	24	24	24

	Avg high (°C)	Avg low (°C)
1	28	23
2	28	23
3	28	23
4	28	23
5	28	23
6	28	23
7	28	23
8	28	23
9	28	23
10	28	23
11	28	23
12	29	23
13	29	23
14	29	23
15	29	23
16	29	23
17	29	23
18	29	23
19	29	23
20	29	23
21	29	23
22	29	23
23	29	24
24	29	24
25	29	24
26	28	24
27	28	24
28	28	24
29	28	24
30	28	24

San José weather by month

How April compares with the rest of the year at a glance. April is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	26° / 22°	171	26.8	11.4	4.5
Feb	27° / 22°	113	22.1	11.6	4.8
Mar	28° / 23°	80	19.8	11.9	5.3
Apr	28° / 23°	63	18.1	12.2	4.8
May	28° / 24°	223	26.7	12.5	3.7
Jun	27° / 24°	281	29.4	12.6	3.3
Jul	27° / 23°	308	30.6	12.6	3.4
Aug	27° / 23°	259	30.5	12.4	3.4
Sep	27° / 23°	260	29.3	12.1	3.4
Oct	27° / 23°	299	29.3	11.8	3.5
Nov	26° / 23°	262	26.2	11.5	4.0
Dec	26° / 22°	214	27.3	11.4	4.2

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 18% of April, with mostly cloudy or overcast conditions the remaining 39%. Skies tend to cloud over as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	79	77	75	75	73	72	70	70	69	68	67	66	66	65	64	62	62	60	59	57	55	54	51	48	47	45	42	41	40	38
Cloudier (%)	21	23	25	25	27	28	30	30	31	32	33	34	34	35	36	38	38	40	41	43	45	46	49	52	53	55	58	59	60	62

	Clearer (%)	Cloudier (%)
1	79	21
2	77	23
3	75	25
4	75	25
5	73	27
6	72	28
7	70	30
8	70	30
9	69	31
10	68	32
11	67	33
12	66	34
13	66	34
14	65	35
15	64	36
16	62	38
17	62	38
18	60	40
19	59	41
20	57	43
21	55	45
22	54	46
23	51	49
24	48	52
25	47	53
26	45	55
27	42	58
28	41	59
29	40	60
30	38	62

Chance of precipitation in April

Any precipitation

San José gets around 63 mm of rain over 18.1 wet days in April, the driest month. 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 71% on the wettest days. The odds climb toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	57	57	57	57	57	57	57	58	58	58	58	58	57	57	57	57	57	57	58	59	60	61	62	64	65	66	67	69	70	71

	Rain chance (%)
1	57
2	57
3	57
4	57
5	57
6	57
7	57
8	58
9	58
10	58
11	58
12	58
13	57
14	57
15	57
16	57
17	57
18	57
19	58
20	59
21	60
22	61
23	62
24	64
25	65
26	66
27	67
28	69
29	70
30	71

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the oppressive band about 70% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Muggy (%)	48	46	44	42	41	39	38	36	35	34	33	32	31	30	29	29	28	27	26	25	24	23	22	20	19	18	16	15	14	13
Oppressive (%)	52	54	56	58	59	61	62	64	65	66	67	68	69	70	71	71	72	73	74	75	76	77	78	80	81	82	84	85	86	87

	Muggy (%)	Oppressive (%)
1	48	52
2	46	54
3	44	56
4	42	58
5	41	59
6	39	61
7	38	62
8	36	64
9	35	65
10	34	66
11	33	67
12	32	68
13	31	69
14	30	70
15	29	71
16	29	71
17	28	72
18	27	73
19	26	74
20	25	75
21	24	76
22	23	77
23	22	78
24	20	80
25	19	81
26	18	82
27	16	84
28	15	85
29	14	86
30	13	87

Wind in April

Winds average 17 km/h in April.

Across April, daily wind ranges from about 15 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	18	18	18	18	18	18	18	18	17	17	17	17	17	17	17	17	17	16	16	16	16	16	16	15	15	15	15	15	15	15
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	18	light breeze
2	18	light breeze
3	18	light breeze
4	18	light breeze
5	18	light breeze
6	18	light breeze
7	18	light breeze
8	18	light breeze
9	17	light breeze
10	17	light breeze
11	17	light breeze
12	17	light breeze
13	17	light breeze
14	17	light breeze
15	17	light breeze
16	17	light breeze
17	17	light breeze
18	16	light breeze
19	16	light breeze
20	16	light breeze
21	16	light breeze
22	16	light breeze
23	16	light breeze
24	15	light breeze
25	15	light breeze
26	15	light breeze
27	15	light breeze
28	15	light breeze
29	15	light breeze
30	15	light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 06 min at the start of April to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over April. Sunrise moves from 5:42 AM to 5:27 AM, and sunset from 5:48 PM to 5:49 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.1	12.1	12.1	12.1	12.1	12.1	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.3	12.4	12.4	12.4
Sunrise (AM)	5:42	5:42	5:41	5:41	5:40	5:39	5:39	5:38	5:38	5:37	5:36	5:36	5:35	5:35	5:34	5:33	5:33	5:32	5:32	5:31	5:31	5:30	5:30	5:29	5:29	5:28	5:28	5:28	5:27	5:27
Sunset (PM)	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:48	5:49	5:49	5:49	5:49	5:49	5:49	5:49

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.1	5:42	5:48
2	12.1	5:42	5:48
3	12.1	5:41	5:48
4	12.1	5:41	5:48
5	12.1	5:40	5:48
6	12.1	5:39	5:48
7	12.2	5:39	5:48
8	12.2	5:38	5:48
9	12.2	5:38	5:48
10	12.2	5:37	5:48
11	12.2	5:36	5:48
12	12.2	5:36	5:48
13	12.2	5:35	5:48
14	12.2	5:35	5:48
15	12.2	5:34	5:48
16	12.2	5:33	5:48
17	12.3	5:33	5:48
18	12.3	5:32	5:48
19	12.3	5:32	5:48
20	12.3	5:31	5:48
21	12.3	5:31	5:48
22	12.3	5:30	5:48
23	12.3	5:30	5:48
24	12.3	5:29	5:49
25	12.3	5:29	5:49
26	12.3	5:28	5:49
27	12.3	5:28	5:49
28	12.4	5:28	5:49
29	12.4	5:27	5:49
30	12.4	5:27	5:49

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 6.04 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.98 kWh/m² to a high of 6.04 kWh/m² in April across the year — April's 6.04 kWh/m² sits near the top of that range.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	6.2	6.2	6.2	6.2	6.2	6.2	6.2	6.2	6.1	6.1	6.1	6.1	6.1	6.1	6.1	6.1	6.0	6.0	6.0	6.0	6.0	5.9	5.9	5.9	5.9	5.8	5.8	5.8	5.7	5.7
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	6.2	Intense
2	6.2	Intense
3	6.2	Intense
4	6.2	Intense
5	6.2	Intense
6	6.2	Intense
7	6.2	Intense
8	6.2	Intense
9	6.1	Intense
10	6.1	Intense
11	6.1	Intense
12	6.1	Intense
13	6.1	Intense
14	6.1	Intense
15	6.1	Intense
16	6.1	Intense
17	6.0	Intense
18	6.0	Intense
19	6.0	Intense
20	6.0	Bright
21	6.0	Bright
22	5.9	Bright
23	5.9	Bright
24	5.9	Bright
25	5.9	Bright
26	5.8	Bright
27	5.8	Bright
28	5.8	Bright
29	5.7	Bright
30	5.7	Bright

Planning a trip in April

Is April a good time to visit San José?

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

4.8

Sightseeing

2nd-best month of the year

5.7

Beach & pool

1st-best month of the year

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

What to pack for San José in April

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

In April, San José sees daytime highs around 28°C and nights near 23°C. Pack light clothes, rain gear and sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near San José 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 65 km away) is warmest in May at about 29°C and coldest in February near 27°C.

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	27	27	27	29	29	29	29	29	29	28	28	27
Comfort	Warm	Warm	Warm	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Tropical	Warm	Warm

	Sea temperature (°C)	Comfort
Jan	27	Warm
Feb	27	Warm
Mar	27	Warm
Apr	29	Tropical
May	29	Tropical
Jun	29	Tropical
Jul	29	Tropical
Aug	29	Tropical
Sep	29	Tropical
Oct	28	Tropical
Nov	28	Warm
Dec	27	Warm

UV index in San José 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 José peaks around March 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 9 (very high).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	11	13	14	14	13	13	12	13	12	12	11	9
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high

	UV index (midday)	Level
Jan	11	Extreme
Feb	13	Extreme
Mar	14	Extreme
Apr	14	Extreme
May	13	Extreme
Jun	13	Extreme
Jul	12	Extreme
Aug	13	Extreme
Sep	12	Extreme
Oct	12	Extreme
Nov	11	Extreme
Dec	9	Very high

Air quality in San José 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 José is worst in July — around 23 µg/m³ PM2.5 (moderate), about 3.8× the cleanest month (December, 6 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	7	8	9	19	21	19	23	18	13	9	6	6
Level	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	7	Good
Feb	8	Good
Mar	9	Good
Apr	19	Moderate
May	21	Moderate
Jun	19	Moderate
Jul	23	Moderate
Aug	18	Moderate
Sep	13	Moderate
Oct	9	Good
Nov	6	Good
Dec	6	Good

Location & terrain

Where is San José?

San José sits at 11.0°N, 85.1°W, 50 m above sea level, in Costa Rica. The nearest listed city is San Carlos, 44 km away.

Topography around San José

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

Within 3 km, the terrain around San José has only modest variations in elevation — a maximum elevation change of 55 m around an average of 51 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 659 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,977 m.

The land around San José is covered by grassland (51%) and trees (48%) within 3 km, trees (59%) and grassland (36%) within 16 km, and trees (45%), water (27%) and grassland (24%) within 80 km.

3 km

55 m

grassland 51%

16 km

659 m

trees 59%

80 km

1,977 m

trees 45%

treesgrasslandcroplandartificial surfaceswater

← March San José year-round climate May →Best places to visit in April

April weather nearby: San Carlos 44 km · Liberia 48 km · Cañas 58 km · La Fortuna 76 km · Monteverde 80 km · El Castillo 81 km · San Juan del Sur 87 km · Rivas 93 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

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 José (10.9519°, -85.1357°, elevation 50 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. 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).

	Avg high (°C)	Avg low (°C)
1	28	23
2	28	23
3	28	23
4	28	23
5	28	23
6	28	23
7	28	23
8	28	23
9	28	23
10	28	23
11	28	23
12	29	23
13	29	23
14	29	23
15	29	23
16	29	23
17	29	23
18	29	23
19	29	23
20	29	23
21	29	23
22	29	23
23	29	24
24	29	24
25	29	24
26	28	24
27	28	24
28	28	24
29	28	24
30	28	24

	Clearer (%)	Cloudier (%)
1	79	21
2	77	23
3	75	25
4	75	25
5	73	27
6	72	28
7	70	30
8	70	30
9	69	31
10	68	32
11	67	33
12	66	34
13	66	34
14	65	35
15	64	36
16	62	38
17	62	38
18	60	40
19	59	41
20	57	43
21	55	45
22	54	46
23	51	49
24	48	52
25	47	53
26	45	55
27	42	58
28	41	59
29	40	60
30	38	62

	Rain chance (%)
1	57
2	57
3	57
4	57
5	57
6	57
7	57
8	58
9	58
10	58
11	58
12	58
13	57
14	57
15	57
16	57
17	57
18	57
19	58
20	59
21	60
22	61
23	62
24	64
25	65
26	66
27	67
28	69
29	70
30	71

	Muggy (%)	Oppressive (%)
1	48	52
2	46	54
3	44	56
4	42	58
5	41	59
6	39	61
7	38	62
8	36	64
9	35	65
10	34	66
11	33	67
12	32	68
13	31	69
14	30	70
15	29	71
16	29	71
17	28	72
18	27	73
19	26	74
20	25	75
21	24	76
22	23	77
23	22	78
24	20	80
25	19	81
26	18	82
27	16	84
28	15	85
29	14	86
30	13	87

	Avg high (°C)	Avg low (°C)
1	28	23
2	28	23
3	28	23
4	28	23
5	28	23
6	28	23
7	28	23
8	28	23
9	28	23
10	28	23
11	28	23
12	29	23
13	29	23
14	29	23
15	29	23
16	29	23
17	29	23
18	29	23
19	29	23
20	29	23
21	29	23
22	29	23
23	29	24
24	29	24
25	29	24
26	28	24
27	28	24
28	28	24
29	28	24
30	28	24

	Clearer (%)	Cloudier (%)
1	79	21
2	77	23
3	75	25
4	75	25
5	73	27
6	72	28
7	70	30
8	70	30
9	69	31
10	68	32
11	67	33
12	66	34
13	66	34
14	65	35
15	64	36
16	62	38
17	62	38
18	60	40
19	59	41
20	57	43
21	55	45
22	54	46
23	51	49
24	48	52
25	47	53
26	45	55
27	42	58
28	41	59
29	40	60
30	38	62

	Rain chance (%)
1	57
2	57
3	57
4	57
5	57
6	57
7	57
8	58
9	58
10	58
11	58
12	58
13	57
14	57
15	57
16	57
17	57
18	57
19	58
20	59
21	60
22	61
23	62
24	64
25	65
26	66
27	67
28	69
29	70
30	71

	Muggy (%)	Oppressive (%)
1	48	52
2	46	54
3	44	56
4	42	58
5	41	59
6	39	61
7	38	62
8	36	64
9	35	65
10	34	66
11	33	67
12	32	68
13	31	69
14	30	70
15	29	71
16	29	71
17	28	72
18	27	73
19	26	74
20	25	75
21	24	76
22	23	77
23	22	78
24	20	80
25	19	81
26	18	82
27	16	84
28	15	85
29	14	86
30	13	87

	Avg high (°C)	Avg low (°C)
1	28	23
2	28	23
3	28	23
4	28	23
5	28	23
6	28	23
7	28	23
8	28	23
9	28	23
10	28	23
11	28	23
12	29	23
13	29	23
14	29	23
15	29	23
16	29	23
17	29	23
18	29	23
19	29	23
20	29	23
21	29	23
22	29	23
23	29	24
24	29	24
25	29	24
26	28	24
27	28	24
28	28	24
29	28	24
30	28	24

	Clearer (%)	Cloudier (%)
1	79	21
2	77	23
3	75	25
4	75	25
5	73	27
6	72	28
7	70	30
8	70	30
9	69	31
10	68	32
11	67	33
12	66	34
13	66	34
14	65	35
15	64	36
16	62	38
17	62	38
18	60	40
19	59	41
20	57	43
21	55	45
22	54	46
23	51	49
24	48	52
25	47	53
26	45	55
27	42	58
28	41	59
29	40	60
30	38	62

	Rain chance (%)
1	57
2	57
3	57
4	57
5	57
6	57
7	57
8	58
9	58
10	58
11	58
12	58
13	57
14	57
15	57
16	57
17	57
18	57
19	58
20	59
21	60
22	61
23	62
24	64
25	65
26	66
27	67
28	69
29	70
30	71

	Muggy (%)	Oppressive (%)
1	48	52
2	46	54
3	44	56
4	42	58
5	41	59
6	39	61
7	38	62
8	36	64
9	35	65
10	34	66
11	33	67
12	32	68
13	31	69
14	30	70
15	29	71
16	29	71
17	28	72
18	27	73
19	26	74
20	25	75
21	24	76
22	23	77
23	22	78
24	20	80
25	19	81
26	18	82
27	16	84
28	15	85
29	14	86
30	13	87