Viacha in Summer
In summer (December, January and February), Viacha sees average daytime highs around 15°C and overnight lows near 5°C, with 376 mm of precipitation over about 68 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Over the season highs ease from about 16°C in early December to 14°C by late February. The sky is clear or mostly clear about 2% of the time across summer, and the air most often feels dry.
Summer is Viacha's weakest season of the year to visit on our travel score. For the whole year in context, see Viacha's year-round climate.
- Avg daytime high
- 15°C
- coldest season of the year
- Avg overnight low
- 5°C
- Precipitation
- 376 mm
- 68 wet days
- Avg wind
- 6 km/h
- Travel score
- 3.0
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Viacha in Summer
Over the season highs ease from about 16°C in early December to 14°C by late February.
A typical summer day in Viacha reaches about 15°C and drops to 5°C overnight. The warmest of the three months is December, the coolest February.
How summer really feels in Viacha
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Viacha weather by month
How the three summer months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 15° / 5° | 143 | 24.8 | 0.6 | 12.9 | 2.7 |
| Feb | 15° / 5° | 124 | 22.6 | 0.4 | 12.6 | 2.7 |
| Mar | 15° / 4° | 96 | 22.4 | 0.1 | 12.1 | 3.1 |
| Apr | 15° / 3° | 46 | 13.6 | 0.1 | 11.6 | 4.2 |
| May | 16° / 0° | 14 | 4.8 | 0.1 | 11.2 | 5.7 |
| Jun | 15° / -2° | 8 | 2.5 | 0.3 | 11 | 5.7 |
| Jul | 15° / -2° | 11 | 3 | 0.9 | 11.1 | 5.6 |
| Aug | 16° / -1° | 17 | 4.5 | 0.9 | 11.4 | 5.7 |
| Sep | 16° / 1° | 32 | 9.6 | 0.6 | 11.9 | 5.4 |
| Oct | 17° / 3° | 53 | 13.3 | 0.5 | 12.4 | 5.0 |
| Nov | 17° / 4° | 58 | 13.9 | 0.1 | 12.8 | 4.8 |
| Dec | 16° / 5° | 110 | 20.9 | 0.5 | 13 | 3.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 2% of the time across summer.
Chance of precipitation in Summer
Viacha gets around 376 mm of rain and snow over 68 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 6 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 54 min in early December to 12 h 24 min by late February. 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 6.4 kWh/m².
Hazard calendar for Viacha
In summer, Viacha overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Viacha's rainy season runs December–March, when most of the year's rain falls.
Is summer a good time to visit Viacha?
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 Viacha.
What to pack for Viacha in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Viacha sees daytime highs around 15°C and nights near 5°C. Pack rain gear and sun protection. Worth having: a warm layer. About 68 days see rain.
UV index in Viacha in Summer
Clear-sky midday UV across summer averages around 18 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Viacha peaks around February 8 at about 19 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 9 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) | 19 | 19 | 17 | 14 | 11 | 9 | 9 | 13 | 15 | 17 | 17 | 18 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 19 | Extreme |
| Feb | 19 | Extreme |
| Mar | 17 | Extreme |
| Apr | 14 | Extreme |
| May | 11 | Extreme |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 13 | Extreme |
| Sep | 15 | Extreme |
| Oct | 17 | Extreme |
| Nov | 17 | Extreme |
| Dec | 18 | Extreme |
Where is Viacha?
Viacha sits at 16.6°S, 68.3°W, 3,870 m above sea level, in Bolivia. The nearest listed city is Laja, 16 km away.
Topography around Viacha
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Viacha.
Within 3 km, the terrain around Viacha has only modest variations in elevation — a maximum elevation change of 115 m around an average of 3,856 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 360 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,498 m.
The land around Viacha is covered by cropland (45%) and grassland (36%) within 3 km, grassland (43%) and cropland (43%) within 16 km, and grassland (65%) within 80 km.
Bolivia travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B / C
- 230 V · 50 Hz
- Prices
- ≈ 40% of US
- price level, 2025
- GDP per capita
- $5,148
- 2025
- Happiness
- 5.8 / 10
- World Happiness, 2025
- Homicide rate
- 4.4
- per 100k, 2023
- Road deaths
- 21.1
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- English
- Moderate
- EF EPI 521
- 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 Viacha (-16.65°, -68.3°, elevation 3,870 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.