San Miguel weather in April

In April, San Miguel sees average daytime highs of 23°C and overnight lows near 15°C, with 123 mm of rain across 19.7 wet days and about 12.2 hours of daylight. It is the 1st-warmest and 8th-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 13% 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 Miguel's 5th-clearest and 7th-windiest month. For the whole year in context, see San Miguel's year-round climate.

Daytime high
23°
1st warmest
Overnight low
15°
6th coldest
Rainfall
123 mm
19.7 wet days
Daylight
12 h 12 min
5:30 AM – 5:43 PM
Cloud cover
71%
5th clearest
Wind
4 km/h
7th windiest
Solar energy
5.65 kWh/m²
Travel score
5.1
out of 10

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 Miguel 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 on par with 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
202315
212315
222315
232315
242315
252315
262315
272315
282315
292315
302315

San Miguel weather by month

How April compares with the rest of the year at a glance. April is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 14°295.911.57.4
Feb23° / 14°275.611.77.7
Mar23° / 14°409.911.97.0
Apr23° / 15°12319.712.25.1
May22° / 16°45528.812.43.6
Jun22° / 16°45828.912.63.4
Jul22° / 15°34028.112.53.6
Aug22° / 15°43129.312.33.5
Sep22° / 15°50929.912.13.3
Oct22° / 15°53730.211.83.3
Nov21° / 15°29924.911.54.1
Dec22° / 14°8813.111.46.1

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 19% of April, with mostly cloudy or overcast conditions the remaining 69%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
24951
34852
44654
54555
64456
74357
84258
94159
103961
113961
123763
133565
143565
153367
163268
173169
182971
192773
202674
212575
222377
232278
241981
251882
261684
271585
281387
291288
301189

Chance of precipitation in April

Any precipitation

San Miguel gets around 123 mm of rain over 19.7 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 66% and peaks near 83% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
147
247
348
449
551
652
753
855
956
1058
1159
1261
1363
1465
1566
1668
1770
1871
1972
2074
2175
2276
2377
2478
2579
2680
2780
2881
2982
3083

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 60% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
1296110
2296011
3286111
4286012
5276013
6266014
7266014
8256015
9246016
10236116
11226117
12216118
13206218
14196219
15186220
16166321
17156322
18146323
19136324
20126325
21116227
22116128
23106030
2495932
2585834
2685636
2775538
2865440
2965242
3055144

Wind in April

Winds average 4 km/h in April.

Across April, 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.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

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 5:38 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)
112.15:385:43
212.15:385:43
312.15:375:43
412.15:375:43
512.15:365:43
612.15:355:43
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
1512.25:305:43
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
2312.35:265:43
2412.35:265:43
2512.35:265:43
2612.35:255:43
2712.35:255:43
2812.35:245:43
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 5.65 kWh/m².

For context, solar energy here swings from a low near 3.74 kWh/m² to a high of 6.04 kWh/m² in March across the year — April's 5.65 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Bright
46.0Bright
56.0Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.7Bright
165.7Bright
175.6Bright
185.6Bright
195.6Bright
205.5Bright
215.5Bright
225.4Bright
235.4Bright
245.3Bright
255.3Bright
265.2Bright
275.2Bright
285.1Bright
295.1Bright
305.0Bright
Planning a trip in April

Hazard calendar for San Miguel

In seasonPeak

None of San Miguel's seasonal hazards are active in April. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

San Miguel's rainy season runs May–November, when most of the year's rain falls.

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

Is April a good time to visit San Miguel?

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

5.1
Sightseeing
5th-best month of the year
4.0
Beach & pool
5th-best month of the year

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

What to pack for San Miguel in April

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

In April, San Miguel sees daytime highs around 23°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 20 days see rain.

rain gearlight clothessun protection

Sea temperature near San Miguel in April

The nearest coast averages about 30°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 56 km away) is warmest in March at about 30°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°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar30Tropical
Apr30Tropical
May29Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct28Tropical
Nov28Warm
Dec28Tropical

UV index in San Miguel 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 Miguel 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

Air quality in San Miguel 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 Miguel is worst in May — around 19 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (January, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1718 µg/m³Jan 149 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar11Good
Apr17Moderate
May19Moderate
Jun17Moderate
Jul18Moderate
Aug17Moderate
Sep16Moderate
Oct14Moderate
Nov12Good
Dec10Good
Location & terrain

Where is San Miguel?

San Miguel sits at 9.9°N, 84.1°W, 1,216 m above sea level, in Costa Rica. The nearest listed city is San Rafael Arriba, 2.0 km away.

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 significant variations in elevation — a maximum elevation change of 370 m around an average of 1,248 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,798 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,764 m.

The land around San Miguel is covered by trees (46%) and artificial surfaces (42%) within 3 km, trees (61%) and artificial surfaces (24%) within 16 km, and trees (68%) within 80 km.

3 km
370 m
16 km
1,798 m
80 km
3,764 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: San Rafael Arriba 2.0 km · San Juan de Dios 3.0 km · Patarrá 3.0 km · Aserrí 4.0 km · Curridabat 5.0 km · San Felipe 6.0 km · San Pedro 6.0 km · San Diego 7.0 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 Miguel (9.8712°, -84.0608°, elevation 1,216 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).