Siquirres in Summer
In summer (June, July and August), Siquirres sees average daytime highs around 26°C and overnight lows near 20°C, with 748 mm of rain over about 82 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Across summer, daytime highs hold fairly steady around 26°C. The sky is clear or mostly clear about 2% of the time across summer, and the air most often feels muggy.
Summer is Siquirres's weakest season of the year to visit on our travel score. Siquirres has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Siquirres's year-round climate.
- Avg daytime high
- 26°C
- warmest season of the year
- Avg overnight low
- 20°C
- Rainfall
- 748 mm
- 82 wet days
- Avg wind
- 4 km/h
- Travel score
- 3.8
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Siquirres in Summer
Across summer, daytime highs hold fairly steady around 26°C.
A typical summer day in Siquirres reaches about 26°C and drops to 20°C overnight. The warmest of the three months is June, the coolest August.
Siquirres weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 24° / 17° | 216 | 16.7 | 11.5 | 6.1 |
| Feb | 24° / 17° | 151 | 14.4 | 11.7 | 6.2 |
| Mar | 25° / 17° | 151 | 16.7 | 11.9 | 5.9 |
| Apr | 26° / 18° | 125 | 17.6 | 12.2 | 5.3 |
| May | 26° / 20° | 391 | 26.4 | 12.5 | 3.9 |
| Jun | 26° / 20° | 290 | 27.4 | 12.6 | 3.6 |
| Jul | 26° / 20° | 237 | 27.3 | 12.5 | 3.8 |
| Aug | 26° / 20° | 222 | 26.9 | 12.3 | 3.9 |
| Sep | 26° / 20° | 315 | 26.3 | 12.1 | 3.8 |
| Oct | 26° / 20° | 511 | 27.9 | 11.8 | 3.8 |
| Nov | 25° / 19° | 400 | 24.4 | 11.5 | 4.3 |
| Dec | 24° / 18° | 286 | 19.3 | 11.4 | 5.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 2% of the time across summer.
Chance of precipitation in Summer
Siquirres gets around 748 mm of rain over 82 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 4 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 30 min in early June to 12 h 12 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 4.5 kWh/m².
Is summer a good time to visit Siquirres?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Siquirres.
What to pack for Siquirres in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Siquirres sees daytime highs around 26°C and nights near 20°C. Pack rain gear. Worth having: light clothes and sun protection. About 82 days see rain.
Sea temperature near Siquirres in Summer
The nearest coast averages about 29°C across summer — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 27 | 28 | 28 | 29 | 29 | 28 | 29 | 29 | 29 | 28 | 28 |
| Comfort | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 28 | Warm |
| Apr | 28 | Tropical |
| May | 29 | Tropical |
| Jun | 29 | Tropical |
| Jul | 28 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 28 | Tropical |
| Dec | 28 | Warm |
UV index in Siquirres in Summer
Clear-sky midday UV across summer averages 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 12 | 13 | 14 | 14 | 13 | 13 | 12 | 13 | 13 | 12 | 11 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 13 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 13 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 12 | Extreme |
| Nov | 11 | Extreme |
| Dec | 10 | Extreme |
Air quality in Siquirres in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 7 | 8 | 9 | 13 | 15 | 14 | 15 | 13 | 11 | 10 | 7 | 7 |
| Level | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 7 | Good |
| Feb | 8 | Good |
| Mar | 9 | Good |
| Apr | 13 | Moderate |
| May | 15 | Moderate |
| Jun | 14 | Moderate |
| Jul | 15 | Moderate |
| Aug | 13 | Moderate |
| Sep | 11 | Good |
| Oct | 10 | Good |
| Nov | 7 | Good |
| Dec | 7 | Good |
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.
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.
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
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.