Ostuncalco in Summer
In summer (June, July and August), Ostuncalco sees average daytime highs around 22°C and overnight lows near 15°C, with 1112 mm of rain over about 88 wet days across the season. It is the 2nd-warmest season and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 22°C. The sky is clear or mostly clear about 3% of the time across summer, and the air most often feels comfortable.
Summer is Ostuncalco's weakest season of the year to visit on our travel score. Ostuncalco 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 Ostuncalco's year-round climate.
- Avg daytime high
- 22°C
- 2nd-warmest season
- Avg overnight low
- 15°C
- Rainfall
- 1112 mm
- 88 wet days
- Avg wind
- 4 km/h
- Travel score
- 3.5
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Ostuncalco in Summer
Across summer, daytime highs hold fairly steady around 22°C.
A typical summer day in Ostuncalco reaches about 22°C and drops to 15°C overnight. The warmest of the three months is June, the coolest July.
Ostuncalco 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 | 21° / 13° | 30 | 9.6 | 11.2 | 7.0 |
| Feb | 22° / 13° | 39 | 10.3 | 11.5 | 6.8 |
| Mar | 22° / 14° | 109 | 20.5 | 11.9 | 5.3 |
| Apr | 22° / 14° | 247 | 26.9 | 12.3 | 4.0 |
| May | 22° / 15° | 550 | 30.4 | 12.7 | 3.5 |
| Jun | 22° / 15° | 452 | 29.4 | 12.9 | 3.4 |
| Jul | 22° / 15° | 297 | 28.8 | 12.8 | 3.7 |
| Aug | 22° / 15° | 363 | 30.1 | 12.5 | 3.5 |
| Sep | 22° / 15° | 479 | 29.8 | 12.1 | 3.3 |
| Oct | 21° / 15° | 362 | 29.7 | 11.7 | 3.5 |
| Nov | 21° / 14° | 117 | 21.2 | 11.3 | 4.9 |
| Dec | 21° / 13° | 43 | 11.8 | 11.1 | 6.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 3% of the time across summer.
Chance of precipitation in Summer
Ostuncalco gets around 1112 mm of rain over 88 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels comfortable — 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 48 min in early June to 12 h 18 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 5.3 kWh/m².
Hazard calendar for Ostuncalco
In summer, Ostuncalco overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Ostuncalco's rainy season runs May–October, when most of the year's rain falls.
Is summer a good time to visit Ostuncalco?
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 Ostuncalco.
What to pack for Ostuncalco in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Ostuncalco sees daytime highs around 22°C and nights near 15°C. Pack rain gear. Worth having: sun protection. About 88 days see rain.
UV index in Ostuncalco 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 Ostuncalco peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 9 (very high).
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) | 9 | 13 | 14 | 14 | 12 | 13 | 13 | 13 | 12 | 11 | 9 | 9 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 13 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 13 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 9 | Very high |
Air quality in Ostuncalco 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 Ostuncalco is worst in May — around 34 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 23 | 22 | 25 | 34 | 34 | 23 | 23 | 22 | 23 | 23 | 23 | 25 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 23 | Moderate |
| Feb | 22 | Moderate |
| Mar | 25 | Moderate |
| Apr | 34 | Moderate |
| May | 34 | Moderate |
| Jun | 23 | Moderate |
| Jul | 23 | Moderate |
| Aug | 22 | Moderate |
| Sep | 23 | Moderate |
| Oct | 23 | Moderate |
| Nov | 23 | Moderate |
| Dec | 25 | Moderate |
Where is Ostuncalco?
Ostuncalco sits at 14.9°N, 91.6°W, 2,506 m above sea level, in Guatemala. The nearest listed city is La Esperanza, 6.0 km away.
Topography around Ostuncalco
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ostuncalco.
Within 3 km, the terrain around Ostuncalco has significant variations in elevation — a maximum elevation change of 574 m around an average of 2,581 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,708 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,178 m.
The land around Ostuncalco is covered by trees (38%), cropland (38%) and artificial surfaces (20%) within 3 km, trees (66%) within 16 km, and trees (69%) within 80 km.
Guatemala travel facts
- Travel advisory
- Level 3
- Reconsider Travel
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 43% of US
- price level, 2025
- GDP per capita
- $6,598
- 2025
- Happiness
- 6.5 / 10
- World Happiness, 2025
- Safe drinking water
- 49%
- of population, 2024
- Homicide rate
- 23.4
- per 100k, 2023
- Road deaths
- 22.9
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 510
- 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 Ostuncalco (14.869°, -91.6214°, elevation 2,506 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.