San Juan de Dios weather in August

In August, San Juan de Dios sees average daytime highs of 23°C and overnight lows near 16°C, with 345 mm of rain across 28.5 wet days and about 12.3 hours of daylight. It is the 5th-warmest and 5th-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 0% of the time in August, and the air most often feels humid.

Daylight stretches from about 12 h 24 min at the start of August to 12 h 12 min by month's end. Set against the rest of the year, August is San Juan de Dios's 9th-clearest and 8th-windiest month. For the whole year in context, see San Juan de Dios's year-round climate.

Daytime high
23°
5th warmest
Overnight low
16°
9th coldest
Rainfall
345 mm
28.5 wet days
Daylight
12 h 18 min
5:31 AM – 5:50 PM
Cloud cover
92%
9th clearest
Wind
5 km/h
8th windiest
Solar energy
4.41 kWh/m²
Travel score
3.7
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

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

A typical August day in San Juan de Dios reaches about 23°C in the afternoon and slips back to 16°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 24°C. Set against its neighbours, August runs on par with July and on par with September.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12316
22316
32316
42316
52316
62316
72316
82316
92316
102316
112316
122316
132316
142316
152316
162316
172316
182316
192316
202316
212316
222316
232316
242316
252316
262316
272316
282316
292316
302316
312316

San Juan de Dios weather by month

How August compares with the rest of the year at a glance. August is the 5th-warmest and 5th-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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 3% of August, with mostly cloudy or overcast conditions the remaining 97%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1496
2496
3496
4496
5496
6496
7496
8496
9496
10496
11397
12397
13397
14397
15397
16397
17397
18397
19397
20397
21298
22298
23298
24298
25298
26298
27298
28298
29298
30298
31298

Chance of precipitation in August

Any precipitation

San Juan de Dios gets around 345 mm of rain over 28.5 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 92% and peaks near 94% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
191
291
391
491
591
691
791
892
992
1092
1192
1292
1393
1493
1593
1693
1793
1893
1993
2092
2192
2292
2392
2492
2592
2693
2793
2893
2993
3094
3194

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 91% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)
111881
211881
311881
410891
510891
610891
710891
89901
99901
109901
119901
129901
139901
149901
159901
169901
178911
188911
198911
208911
218911
228920
238920
248920
258920
267930
277930
287921
296931
306931
316931

Wind in August

Winds average 5 km/h in August.

Across August, 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.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in August

DaylightNight

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

Days shrink by about 12 minutes over August. Sunrise moves from 5:29 AM to 5:30 AM, and sunset from 5:56 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:295:56
212.45:295:55
312.45:305:55
412.45:305:55
512.45:305:54
612.45:305:54
712.45:305:54
812.45:305:53
912.45:305:53
1012.45:305:53
1112.45:305:52
1212.45:305:52
1312.45:305:52
1412.35:315:51
1512.35:315:51
1612.35:315:50
1712.35:315:50
1812.35:315:49
1912.35:315:49
2012.35:315:48
2112.35:315:48
2212.35:315:47
2312.35:315:47
2412.35:315:46
2512.35:315:46
2612.25:315:45
2712.25:315:45
2812.25:315:44
2912.25:305:44
3012.25:305:43
3112.25:305:42

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.41 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 — August's 4.41 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.4Bright
164.4Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in August

Is August a good time to visit San Juan de Dios?

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

3.7
Sightseeing
8th-best month of the year
2.8
Beach & pool
7th-best month of the year

August is a weaker month for outdoor sightseeing in San Juan de Dios.

What to pack for San Juan de Dios in August

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

In August, San Juan de Dios sees daytime highs around 23°C and nights near 16°C. Pack rain gear. Worth having: light clothes. About 29 days see rain.

rain gearlight clothes

Sea temperature near San Juan de Dios in August

The nearest coast averages about 29°C in August — 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 Juan de Dios in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 13 (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 Juan de Dios 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 Juan de Dios in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in San Juan de Dios 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 Juan de Dios?

San Juan de Dios sits at 9.9°N, 84.1°W, 1,207 m above sea level, in Costa Rica. The nearest listed city is San Rafael Arriba, 1.0 km away.

Topography around San Juan de Dios

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

Within 3 km, the terrain around San Juan de Dios has large variations in elevation — a maximum elevation change of 719 m around an average of 1,263 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,853 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,764 m.

The land around San Juan de Dios is covered by artificial surfaces (48%) and trees (44%) within 3 km, trees (61%) and artificial surfaces (25%) within 16 km, and trees (67%) within 80 km.

3 km
719 m
16 km
1,853 m
80 km
3,764 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: San Rafael Arriba 1.0 km · Aserrí 2.0 km · San Miguel 3.0 km · San Felipe 4.0 km · Patarrá 5.0 km · San Jose 6.0 km · Curridabat 7.0 km · San Pedro 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 Juan de Dios (9.8781°, -84.0844°, elevation 1,207 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).