Siquirres weather in August

In August, Siquirres sees average daytime highs of 26°C and overnight lows near 20°C, with 222 mm of rain across 26.9 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 2% of the time in August, and the air most often feels muggy.

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 Siquirres's 8th-clearest and 10th-windiest month. For the whole year in context, see Siquirres's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
20°
9th coldest
Rainfall
222 mm
26.9 wet days
Daylight
12 h 18 min
5:28 AM – 5:48 PM
Cloud cover
88%
8th clearest
Wind
4 km/h
10th windiest
Solar energy
4.69 kWh/m²
Travel score
3.9
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical August day in Siquirres reaches about 26°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°C. Set against its neighbours, August runs on par with July and on par with September.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12620
22620
32620
42620
52620
62620
72620
82620
92620
102620
112620
122620
132620
142620
152620
162620
172620
182620
192620
202620
212620
222620
232620
242620
252620
262620
272620
282620
292620
302620
312620

Siquirres weather by month

How August compares with the rest of the year at a glance. August 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
Jan24° / 17°21616.711.56.1
Feb24° / 17°15114.411.76.2
Mar25° / 17°15116.711.95.9
Apr26° / 18°12517.612.25.3
May26° / 20°39126.412.53.9
Jun26° / 20°29027.412.63.6
Jul26° / 20°23727.312.53.8
Aug26° / 20°22226.912.33.9
Sep26° / 20°31526.312.13.8
Oct26° / 20°51127.911.83.8
Nov25° / 19°40024.411.54.3
Dec24° / 18°28619.311.45.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 5% of August, with mostly cloudy or overcast conditions the remaining 93%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1694
2694
3595
4595
5595
6595
7595
8694
9694
10694
11694
12694
13694
14793
15793
16793
17793
18892
19892
20793
21793
22793
23793
24793
25892
26892
27892
28892
29892
30892
31892

Chance of precipitation in August

Any precipitation

Siquirres gets around 222 mm of rain over 26.9 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 87% and peaks near 89% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
186
286
386
487
587
687
788
888
988
1088
1188
1289
1389
1489
1589
1688
1788
1888
1988
2087
2187
2287
2386
2485
2585
2684
2784
2884
2983
3083
3183

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 96% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
12962
22962
31972
41963
51963
61963
71963
81963
91963
101963
111963
121972
131972
141972
150982
160982
170982
180982
190982
200973
210973
221963
231963
241954
251954
260964
270964
280964
290955
300955
310955

Wind in August

Winds average 4 km/h in August.

Across August, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
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
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 5:27 AM to 5:28 AM, and sunset from 5:54 PM to 5:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:275:54
212.45:275:53
312.45:275:53
412.45:275:53
512.45:275:52
612.45:275:52
712.45:275:52
812.45:275:51
912.45:285:51
1012.45:285:51
1112.45:285:50
1212.45:285:50
1312.45:285:49
1412.45:285:49
1512.35:285:49
1612.35:285:48
1712.35:285:48
1812.35:285:47
1912.35:285:47
2012.35:285:46
2112.35:285:46
2212.35:285:45
2312.35:285:45
2412.35:285:44
2512.35:285:44
2612.35:285:43
2712.25:285:43
2812.25:285:42
2912.25:285:41
3012.25:285:41
3112.25:285:40

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.69 kWh/m².

For context, solar energy here swings from a low near 3.7 kWh/m² to a high of 5.76 kWh/m² in March across the year — August's 4.69 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in August

Is August a good time to visit Siquirres?

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

3.9
Sightseeing
7th-best month of the year
3.8
Beach & pool
8th-best month of the year

August is a weaker month for outdoor sightseeing in Siquirres.

What to pack for Siquirres in August

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

In August, Siquirres sees daytime highs around 26°C and nights near 20°C. Pack rain gear. Worth having: light clothes and sun protection. About 27 days see rain.

rain gearlight clothessun protection

Sea temperature near Siquirres 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 34 km away) is warmest in September at about 29°C and coldest in January near 27°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
Jan27Warm
Feb27Warm
Mar28Warm
Apr28Tropical
May29Tropical
Jun29Tropical
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec28Warm

UV index in Siquirres 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 Siquirres peaks around March 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 20UV 14Dec 15UV 10
UV index (midday)Level
Jan12Extreme
Feb13Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun13Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov11Extreme
Dec10Extreme

Air quality in Siquirres 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 Siquirres is worst in July — around 15 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1515 µg/m³Dec 217 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar9Good
Apr13Moderate
May15Moderate
Jun14Moderate
Jul15Moderate
Aug13Moderate
Sep11Good
Oct10Good
Nov7Good
Dec7Good
Location & terrain

Where is Siquirres?

Siquirres sits at 10.1°N, 83.5°W, 69 m above sea level, in Costa Rica. The nearest listed city is Turrialba, 29 km away.

TurrialbaGuápilesParaísoCartagoPuerto LimónIpísSan DiegoPurral

Topography around Siquirres

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

Within 3 km, the terrain around Siquirres has significant variations in elevation — a maximum elevation change of 486 m around an average of 137 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,108 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,765 m.

The land around Siquirres is covered by trees (78%) within 3 km, trees (81%) within 16 km, and trees (66%) and water (22%) within 80 km.

3 km
486 m
16 km
1,108 m
80 km
3,765 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Turrialba 29 km · Guápiles 33 km · Paraíso 49 km · Cartago 52 km · Puerto Limón 53 km · Ipís 58 km · San Diego 58 km · Purral 60 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 Siquirres (10.0975°, -83.5066°, elevation 69 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).