Siquirres weather in May

In May, Siquirres sees average daytime highs of 26°C and overnight lows near 20°C, with 391 mm of rain across 26.4 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 3rd-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 May, and the air most often feels muggy.

Daylight stretches from about 12 h 24 min at the start of May to 12 h 30 min by month's end. Set against the rest of the year, May is Siquirres's 11th-clearest and 7th-windiest month. For the whole year in context, see Siquirres's year-round climate.

Daytime high
26°
4th warmest
Overnight low
20°
11th coldest
Rainfall
391 mm
26.4 wet days
Daylight
12 h 30 min
5:16 AM – 5:44 PM
Cloud cover
89%
11th clearest
Wind
4 km/h
7th windiest
Solar energy
4.57 kWh/m²
Travel score
3.9
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

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

A typical May day in Siquirres reaches about 26°C in the afternoon and slips back to 20°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 28°C. Set against its neighbours, May runs on par with April and on par with June.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12619
22619
32619
42619
52619
62619
72619
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 May compares with the rest of the year at a glance. May is the 4th-warmest and 3rd-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

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

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11486
21288
31189
41189
51090
61090
71090
8991
9892
10793
11793
12694
13694
14694
15694
16595
17595
18595
19595
20595
21595
22595
23595
24595
25595
26595
27595
28595
29694
30694
31694

Chance of precipitation in May

Any precipitation

Siquirres gets around 391 mm of rain over 26.4 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 85% and peaks near 91% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
171
272
373
474
576
677
778
879
980
1081
1182
1283
1384
1485
1587
1687
1788
1889
1989
2090
2190
2290
2391
2491
2591
2691
2791
2891
2991
3091
3191

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the muggy band about 81% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
19856
28866
37876
47867
56877
65878
75869
85869
948610
1048511
1138512
1238413
1328315
1428216
1528117
1618019
1717920
1817821
1917722
2017722
2117623
2217623
2317623
2417524
2517524
2617524
2707624
2807624
2907723
3007723
3107822

Wind in May

Winds average 4 km/h in May.

Across May, 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 May

DaylightNight

Daylight runs from about 12 h 24 min at the start of May to 12 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over May. Sunrise moves from 5:21 AM to 5:15 AM, and sunset from 5:42 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:215:42
212.45:205:42
312.45:205:42
412.45:205:42
512.45:195:42
612.45:195:42
712.45:195:43
812.45:185:43
912.45:185:43
1012.45:185:43
1112.45:185:43
1212.45:175:43
1312.45:175:44
1412.45:175:44
1512.55:175:44
1612.55:165:44
1712.55:165:44
1812.55:165:45
1912.55:165:45
2012.55:165:45
2112.55:165:45
2212.55:165:45
2312.55:155:46
2412.55:155:46
2512.55:155:46
2612.55:155:46
2712.55:155:47
2812.55:155:47
2912.55:155:47
3012.55:155:47
3112.55:155:48

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.57 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 — May's 4.57 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.0Bright
35.0Bright
45.0Bright
54.9Bright
64.9Bright
74.8Bright
84.8Bright
94.7Bright
104.7Bright
114.7Bright
124.6Bright
134.6Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.4Bright
244.4Bright
254.4Bright
264.4Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in May

Is May a good time to visit Siquirres?

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

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

May is a weaker month for outdoor sightseeing in Siquirres.

What to pack for Siquirres in May

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

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

rain gearlight clothessun protection

Sea temperature near Siquirres in May

The nearest coast averages about 29°C in May — 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 May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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
May 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).