San_Ramon_ weather in April

In April, San_Ramon_ sees average daytime highs of 29°C and overnight lows near 21°C, with 98 mm of rain across 20.7 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 21% of the time in April, and the air most often feels muggy.

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_Ramon_'s 5th-clearest and 5th-windiest month. For the whole year in context, see San_Ramon_'s year-round climate.

Daytime high
29°
3rd warmest
Overnight low
21°
9th coldest
Rainfall
98 mm
20.7 wet days
Daylight
12 h 12 min
5:31 AM – 5:45 PM
Cloud cover
65%
5th clearest
Wind
5 km/h
5th windiest
Solar energy
5.86 kWh/m²
Travel score
4.1
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical April day in San_Ramon_ reaches about 29°C in the afternoon and slips back to 21°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°C. Set against its neighbours, April runs on par with March and about 1°C warmer than May.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13021
23021
33021
42921
52921
62921
72921
82921
92921
102921
112921
122921
132921
142921
152921
162921
172921
182921
192921
202921
212921
222921
232921
242921
252921
262921
272821
282821
292821
302821

San_Ramon_ weather by month

How April compares with the rest of the year at a glance. April is the 3rd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 20°216.711.56.8
Feb29° / 20°154.211.76.4
Mar30° / 20°247.911.95.6
Apr29° / 21°9820.712.24.1
May28° / 21°38129.612.53.3
Jun27° / 21°41729.812.63.3
Jul27° / 21°32029.912.53.3
Aug27° / 21°39830.412.33.3
Sep27° / 20°44229.812.13.3
Oct26° / 20°50330.711.83.3
Nov26° / 20°26726.511.53.9
Dec27° / 20°7516.311.45.7

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 22% of April, with mostly cloudy or overcast conditions the remaining 58%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16238
26040
35941
45743
55644
65545
75248
85149
95149
105050
114951
124852
134753
144555
154555
164555
174357
184159
194060
203961
213664
223466
233268
243169
252872
262674
272476
282377
292179
301981

Chance of precipitation in April

Any precipitation

San_Ramon_ gets around 98 mm of rain over 20.7 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 69% and peaks near 88% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
145
246
348
450
552
654
756
857
959
1060
1162
1264
1365
1467
1569
1671
1772
1874
1975
2077
2178
2279
2381
2482
2583
2684
2785
2886
2987
3088

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 63% of days. Sticky, muggy-or-worse air turns up on roughly 69% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1843471
2842492
3841502
4739522
5739522
6638533
7637543
8536563
9535573
10535573
11434593
12433603
13332614
14331624
15231634
16230635
17229645
18127666
19126676
20124687
21123688
22121699
23120709
241187110
251177111
261157212
270147313
280137413
290117514
300107515

Wind in April

Winds average 5 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
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
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 5:40 AM to 5:25 AM, and sunset from 5:45 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:405:45
212.15:395:45
312.15:395:45
412.15:385:45
512.15:385:45
612.15:375:45
712.15:365:45
812.15:365:45
912.25:355:45
1012.25:355:45
1112.25:345:45
1212.25:345:45
1312.25:335:45
1412.25:325:45
1512.25:325:45
1612.25:315:45
1712.25:315:45
1812.25:305:45
1912.25:305:45
2012.35:295:45
2112.35:295:45
2212.35:285:45
2312.35:285:45
2412.35:275:45
2512.35:275:45
2612.35:275:45
2712.35:265:45
2812.35:265:45
2912.35:255:45
3012.35:255:46

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.86 kWh/m².

For context, solar energy here swings from a low near 3.82 kWh/m² to a high of 6.19 kWh/m² in March across the year — April's 5.86 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.0Intense
116.0Intense
126.0Intense
136.0Bright
145.9Bright
155.9Bright
165.9Bright
175.8Bright
185.8Bright
195.8Bright
205.7Bright
215.7Bright
225.7Bright
235.6Bright
245.6Bright
255.5Bright
265.5Bright
275.4Bright
285.4Bright
295.3Bright
305.3Bright
Planning a trip in April

Hazard calendar for San_Ramon_

In seasonPeak

None of San_Ramon_'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_Ramon_'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_Ramon_?

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

4.1
Sightseeing
5th-best month of the year
5.2
Beach & pool
5th-best month of the year

April is a reasonable time to visit San_Ramon_ for sightseeing.

What to pack for San_Ramon_ in April

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

In April, San_Ramon_ sees daytime highs around 29°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

Sea temperature near San_Ramon_ 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 29 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_Ramon_ 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_Ramon_ peaks around February 22 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 22UV 14Dec 17UV 10
UV index (midday)Level
Jan11Extreme
Feb14Extreme
Mar14Extreme
Apr14Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec10Very high

Air quality in San_Ramon_ 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_Ramon_ is worst in May — around 18 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (January, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1617 µg/m³Jan 19 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar11Good
Apr16Moderate
May18Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep14Moderate
Oct12Moderate
Nov11Good
Dec9Good
Location & terrain

Where is San_Ramon_?

San_Ramon_ sits at 10.1°N, 84.5°W, 0 m above sea level, in Costa Rica. The nearest listed city is Esparza, 24 km away.

EsparzaQuesadaAlajuelaSan Rafael AbajoChacaritaMercedes NorteSan FranciscoHeredia

Topography around San_Ramon_

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

Within 3 km, the terrain around San_Ramon_ has significant variations in elevation — a maximum elevation change of 294 m around an average of 1,066 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,914 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,414 m.

The land around San_Ramon_ is covered by trees (53%), artificial surfaces (25%) and grassland (21%) within 3 km, trees (68%) and grassland (27%) within 16 km, and trees (61%) within 80 km.

3 km
294 m
16 km
1,914 m
80 km
3,414 m
treesgrasslandcroplandartificial surfaceswatermangroves
April weather nearby: Esparza 24 km · Quesada 27 km · Alajuela 29 km · San Rafael Abajo 35 km · Chacarita 36 km · Mercedes Norte 38 km · San Francisco 39 km · Heredia 40 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_Ramon_ (10.088°, -84.4702°, 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. 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).