Climate and average weather in Viacha
In Viacha, the weather is mild, wet, and mostly cloudy and remarkably steady, with daytime highs holding near mild levels all year. The wettest stretch peaks around January.
Over the course of the year, the temperature in Viacha typically varies from -2°C to 17°C, and is rarely below -5°C or above 20°C. November is the hottest month of the year, while January is the coldest.
Based on the travel score, the best time of year to visit Viacha for warm-weather activities is from late April to mid November.
- Hottest
- Nov
- 17°
- Coldest
- Jan
- 5°
- Wettest
- Jan
- 143 mm
- Driest
- Jun
- 8 mm
- Rain / yr
- 711 mm
- 156 wet days
- Daylight
- 11.0–13.0 h
- shortest–longest
- Elevation
- 3,870 m
- 16.6°S
- Clearest
- Jul
- 30% cloud
Viacha is city in Bolivia.
- Density
- 18,344/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Viacha weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around late April to mid November.
Temperature through the year
Daily average highs and lows in Viacha, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
Temperatures in Viacha stay fairly even through the year, without a distinct hot or cool season. The warmest month is November, with an average high of 17°C and low of 4°C; the coolest is January, with an average low of 5°C and high of 15°C.
Days typically run about 13°C warmer than nights, with the widest day–night swing (around 17°C) in July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 15 | 15 | 15 | 15 | 16 | 15 | 15 | 16 | 16 | 17 | 17 | 16 |
| Avg low (°C) | 5 | 5 | 4 | 3 | 0 | -2 | -2 | -1 | 1 | 3 | 4 | 5 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 15 | 5 |
| Feb | 15 | 5 |
| Mar | 15 | 4 |
| Apr | 15 | 3 |
| May | 16 | 0 |
| Jun | 15 | -2 |
| Jul | 15 | -2 |
| Aug | 16 | -1 |
| Sep | 16 | 1 |
| Oct | 17 | 3 |
| Nov | 17 | 4 |
| Dec | 16 | 5 |
How hot and cold Viacha really feels
The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.
On the coldest nights, wind chill pulls the feels-like down to about -5°C (around July 16), with roughly 148 freezing days a year (feels-like at or below 0°C), worst in July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 15 | 14 | 15 | 15 | 16 | 15 | 15 | 16 | 16 | 17 | 17 | 16 |
| Air high (°C) | 15 | 15 | 15 | 15 | 16 | 15 | 15 | 16 | 16 | 17 | 17 | 16 |
| Feels-like low (°C) | 4 | 3 | 3 | 1 | -2 | -4 | -4 | -3 | -1 | 1 | 3 | 4 |
| Air low (°C) | 5 | 5 | 4 | 3 | 0 | -2 | -2 | -1 | 1 | 3 | 4 | 5 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 15 | 15 | 4 | 5 |
| Feb | 14 | 15 | 3 | 5 |
| Mar | 15 | 15 | 3 | 4 |
| Apr | 15 | 15 | 1 | 3 |
| May | 16 | 16 | -2 | 0 |
| Jun | 15 | 15 | -4 | -2 |
| Jul | 15 | 15 | -4 | -2 |
| Aug | 16 | 16 | -3 | -1 |
| Sep | 16 | 16 | -1 | 1 |
| Oct | 17 | 17 | 1 | 3 |
| Nov | 17 | 17 | 3 | 4 |
| Dec | 16 | 16 | 4 | 5 |
Average hourly temperature in Viacha
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on November afternoons, near 17°C, and coldest before dawn in January, near 5°C.
Viacha weather by month
Every month at a glance. Click a month for its detailed page.
| 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 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Viacha gets about 711 mm of precipitation a year. On a typical day the chance of rain is often wet, but that rises and falls sharply with the seasons.
The wetter season lasts 5.3 months, from around Nov 8 to Apr 18, peaking in February at about 82% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 22.
January is the wettest month by volume, with 143 mm over about 25 wet days; June is the driest, with 8 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 80 | 81 | 71 | 46 | 17 | 8 | 10 | 16 | 31 | 43 | 47 | 67 |
| Rain days | 25 | 23 | 22 | 14 | 5 | 3 | 3 | 5 | 10 | 13 | 14 | 21 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 80 | 25 |
| Feb | 81 | 23 |
| Mar | 71 | 22 |
| Apr | 46 | 14 |
| May | 17 | 5 |
| Jun | 8 | 3 |
| Jul | 10 | 3 |
| Aug | 16 | 5 |
| Sep | 31 | 10 |
| Oct | 43 | 13 |
| Nov | 47 | 14 |
| Dec | 67 | 21 |
Monthly rainfall
Over a full year, Viacha collects about 711 mm of rain across 156 wet days — roughly 59 mm in an average month.
It doesn’t fall evenly. January is the wettest month with 143 mm, while June is the driest at just 8 mm. The three wettest months alone bring about 53% of the year’s total, and some of the cold-season precipitation falls as snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 143 | 124 | 96 | 46 | 14 | 8 | 11 | 17 | 32 | 53 | 58 | 110 |
| Rain days | 25 | 23 | 22 | 14 | 5 | 3 | 3 | 5 | 10 | 13 | 14 | 21 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 1 |
| Rainfall (mm) | Rain days | Snow days | |
|---|---|---|---|
| Jan | 143 | 25 | 1 |
| Feb | 124 | 23 | 0 |
| Mar | 96 | 22 | 0 |
| Apr | 46 | 14 | 0 |
| May | 14 | 5 | 0 |
| Jun | 8 | 3 | 0 |
| Jul | 11 | 3 | 1 |
| Aug | 17 | 5 | 1 |
| Sep | 32 | 10 | 1 |
| Oct | 53 | 13 | 1 |
| Nov | 58 | 14 | 0 |
| Dec | 110 | 21 | 1 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Viacha, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around April 19 and lasts for 5.7 months, ending around October 10. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 84% of the time on average.
The cloudier part of the year begins around October 11 and lasts for 6.2 months, ending around April 18. The cloudiest month is January, when it is overcast or mostly cloudy 92% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 8 | 11 | 20 | 43 | 72 | 80 | 84 | 82 | 69 | 41 | 25 | 10 |
| Cloudier (%) | 92 | 89 | 80 | 57 | 28 | 20 | 16 | 18 | 31 | 59 | 75 | 90 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 8 | 92 |
| Feb | 11 | 89 |
| Mar | 20 | 80 |
| Apr | 43 | 57 |
| May | 72 | 28 |
| Jun | 80 | 20 |
| Jul | 84 | 16 |
| Aug | 82 | 18 |
| Sep | 69 | 31 |
| Oct | 41 | 59 |
| Nov | 25 | 75 |
| Dec | 10 | 90 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around January 1, brings about 13 hours of light; the shortest, around June 7, only 11 hours — a swing of roughly 2 hours.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.9 | 12.6 | 12.1 | 11.6 | 11.2 | 11.0 | 11.1 | 11.4 | 11.9 | 12.4 | 12.8 | 13.0 |
| Sunrise (AM) | 6:16 | 6:31 | 6:39 | 6:45 | 6:53 | 7:03 | 7:06 | 6:54 | 6:30 | 6:07 | 5:55 | 6:00 |
| Sunset (PM) | 7:09 | 7:05 | 6:46 | 6:22 | 6:06 | 6:04 | 6:12 | 6:20 | 6:25 | 6:30 | 6:42 | 6:59 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 12.9 | 6:16 | 7:09 |
| Feb | 12.6 | 6:31 | 7:05 |
| Mar | 12.1 | 6:39 | 6:46 |
| Apr | 11.6 | 6:45 | 6:22 |
| May | 11.2 | 6:53 | 6:06 |
| Jun | 11.0 | 7:03 | 6:04 |
| Jul | 11.1 | 7:06 | 6:12 |
| Aug | 11.4 | 6:54 | 6:20 |
| Sep | 11.9 | 6:30 | 6:25 |
| Oct | 12.4 | 6:07 | 6:30 |
| Nov | 12.8 | 5:55 | 6:42 |
| Dec | 13.0 | 6:00 | 6:59 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Viacha averages about 9 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 0 and 22 days.
The sunnier stretch runs 5.5 months, from around Apr 22 to Oct 4. The sunniest month is July, with roughly 21 sunny days (bright).
The greyest month is January, down near 0 sunny days — about 98% fewer than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 0 | 1 | 2 | 7 | 17 | 20 | 21 | 18 | 13 | 7 | 3 | 1 |
| Sky | Gloomy | Gloomy | Gloomy | Gloomy | Bright | Bright | Bright | Bright | Mixed | Gloomy | Gloomy | Gloomy |
| Sunny days | Sky | |
|---|---|---|
| Jan | 0 | Gloomy |
| Feb | 1 | Gloomy |
| Mar | 2 | Gloomy |
| Apr | 7 | Gloomy |
| May | 17 | Bright |
| Jun | 20 | Bright |
| Jul | 21 | Bright |
| Aug | 18 | Bright |
| Sep | 13 | Mixed |
| Oct | 7 | Gloomy |
| Nov | 3 | Gloomy |
| Dec | 1 | Gloomy |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Viacha, the air stays dry or comfortable essentially all year. Even in January, the muggiest month, it feels humid or worse only about 0% of the time — humidity is not something you need to plan around here.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Dry (%) | |
|---|---|
| Jan | 100 |
| Feb | 100 |
| Mar | 100 |
| Apr | 100 |
| May | 100 |
| Jun | 100 |
| Jul | 100 |
| Aug | 100 |
| Sep | 100 |
| Oct | 100 |
| Nov | 100 |
| Dec | 100 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Wind in Viacha is steady company: average speeds sit near 6 km/h — calm — in every month of the year, with no meaningful windy or calm season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 6 | 6 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 6 | 6 | 6 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 6 | calm |
| Feb | 6 | calm |
| Mar | 5 | calm |
| Apr | 5 | calm |
| May | 6 | calm |
| Jun | 6 | calm |
| Jul | 6 | calm |
| Aug | 7 | calm |
| Sep | 7 | calm |
| Oct | 6 | calm |
| Nov | 6 | calm |
| Dec | 6 | calm |
Hazard calendar for Viacha
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Viacha's rainy season runs December–March, when most of the year's rain falls.
Best time to visit Viacha
To characterize how pleasant the weather is in Viacha throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around early November, Viacha is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Viacha for general outdoor tourist activities is from late April to mid November, with a peak score in the last week of May.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 2.7 | 2.7 | 3.1 | 4.3 | 5.6 | 5.7 | 5.6 | 5.7 | 5.4 | 5.0 | 4.7 | 3.5 |
| Rating | poor | poor | poor | fair | good | good | good | good | fair | fair | fair | poor |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 2.7 | poor |
| Feb | 2.7 | poor |
| Mar | 3.1 | poor |
| Apr | 4.3 | fair |
| May | 5.6 | good |
| Jun | 5.7 | good |
| Jul | 5.6 | good |
| Aug | 5.7 | good |
| Sep | 5.4 | fair |
| Oct | 5.0 | fair |
| Nov | 4.7 | fair |
| Dec | 3.5 | poor |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Viacha rarely gets warm enough to lift this score — no time of year really suits hot-weather activities here.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Viacha, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
Viacha packs about the same all year — highs hold near 17°C. Across the year the things worth having are a warm layer, rain gear and sun protection.
In November, Viacha sees daytime highs around 17°C and nights near 4°C. Pack rain gear and sun protection. Worth having: a warm layer. About 14 days see rain.
UV index (midday) in Viacha by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
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 |
Average hourly UV index in Viacha
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in February the burn window is concentrated in the middle of the day: about 9 hours a day reach index 3 (protection recommended), and 7.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 9.5 | 9 | 8.5 | 8 | 7.5 | 7 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 |
| UV ≥ 6 (h/day) | 7.5 | 7.5 | 7 | 6.5 | 5.5 | 4.5 | 4.5 | 5.5 | 6.5 | 7 | 7.5 | 7.5 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 9.5 | 7.5 |
| Feb | 9 | 7.5 |
| Mar | 8.5 | 7 |
| Apr | 8 | 6.5 |
| May | 7.5 | 5.5 |
| Jun | 7 | 4.5 |
| Jul | 7 | 4.5 |
| Aug | 7.5 | 5.5 |
| Sep | 8 | 6.5 |
| Oct | 8.5 | 7 |
| Nov | 9 | 7.5 |
| Dec | 9.5 | 7.5 |
Growing season
The growing season in Viacha typically lasts about 258 days, from around August 31 to May 15 — the span where a frost-free day is more likely than not. It is reliably frost-free from October 2 to April 19.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 100 | 100 | 100 | 92 | 51 | 20 | 14 | 35 | 72 | 96 | 99 | 100 |
| Frost nights | 0 | 0 | 0 | 14 | 31 | 30 | 31 | 31 | 30 | 3 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 92 | 14 |
| May | 51 | 31 |
| Jun | 20 | 30 |
| Jul | 14 | 31 |
| Aug | 35 | 31 |
| Sep | 72 | 30 |
| Oct | 96 | 3 |
| Nov | 99 | 0 |
| Dec | 100 | 0 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Viacha banks about 34 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around November.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 20 | 11 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 0 |
| Apr | 0 |
| May | 0 |
| Jun | 0 |
| Jul | 0 |
| Aug | 0 |
| Sep | 0 |
| Oct | 4 |
| Nov | 20 |
| Dec | 11 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Viacha receives about 6.4 kWh/m² a day of solar energy on average — intense — with a clear seasonal swing between 5.4 and 7.5 kWh/m².
The brighter stretch of the year lasts 4.4 months, from around Aug 22 to Jan 1. The brightest month is November, averaging about 7.4 kWh/m² (intense).
The dimmest month is June, down near 5.5 kWh/m² — roughly 26% less than the November peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.3 | 6.3 | 6.2 | 6.0 | 5.8 | 5.4 | 5.6 | 6.2 | 6.9 | 7.3 | 7.4 | 6.7 |
| Level | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 6.3 | Intense |
| Feb | 6.3 | Intense |
| Mar | 6.2 | Intense |
| Apr | 6.0 | Bright |
| May | 5.8 | Bright |
| Jun | 5.4 | Bright |
| Jul | 5.6 | Bright |
| Aug | 6.2 | Intense |
| Sep | 6.9 | Intense |
| Oct | 7.3 | Intense |
| Nov | 7.4 | Intense |
| Dec | 6.7 | Intense |
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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).