San Borja in Winter
In winter (June, July and August), San Borja sees average daytime highs around 29°C and overnight lows near 18°C, with 166 mm of rain over about 21 wet days across the season. It is the coldest season of the year and the driest season of the year.
Over the season highs climb from about 28°C in early June to 32°C by late August. The sky is clear or mostly clear about 45% of the time across winter, and the air most often feels muggy.
Winter is San Borja's best season of the year to visit on our travel score. For the whole year in context, see San Borja's year-round climate.
- Avg daytime high
- 29°C
- coldest season of the year
- Avg overnight low
- 18°C
- Rainfall
- 166 mm
- 21 wet days
- Avg wind
- 8 km/h
- Travel score
- 6.0
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in San Borja in Winter
Over the season highs climb from about 28°C in early June to 32°C by late August.
A typical winter day in San Borja reaches about 29°C and drops to 18°C overnight. The warmest of the three months is August, the coolest July.
How winter really feels in San Borja
Once humidity and wind are folded in, winter brings about 16 days that feel above 32°C and 0 that feel at or below 0°C.
The story in winter is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
San Borja weather by month
How the three winter 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 | 31° / 23° | 348 | 27.1 | 12.8 | 2.7 |
| Feb | 31° / 23° | 303 | 23.3 | 12.5 | 2.9 |
| Mar | 31° / 23° | 265 | 24 | 12.1 | 3.0 |
| Apr | 30° / 22° | 154 | 16.7 | 11.7 | 3.9 |
| May | 29° / 20° | 86 | 11.3 | 11.3 | 5.5 |
| Jun | 28° / 19° | 57 | 7.6 | 11.1 | 6.5 |
| Jul | 28° / 18° | 49 | 6.2 | 11.2 | 6.5 |
| Aug | 31° / 19° | 60 | 7 | 11.5 | 4.9 |
| Sep | 33° / 21° | 118 | 10.8 | 11.9 | 3.6 |
| Oct | 33° / 23° | 178 | 17.6 | 12.3 | 3.0 |
| Nov | 32° / 23° | 212 | 19.4 | 12.7 | 3.0 |
| Dec | 31° / 23° | 294 | 24.6 | 12.9 | 2.8 |
Cloud cover in Winter
The sky is clear or mostly clear about 45% of the time across winter.
Chance of precipitation in Winter
San Borja gets around 166 mm of rain over 21 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 8 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 12 min in early June to 11 h 42 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 4.2 kWh/m².
Hazard calendar for San Borja
None of San Borja's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
San Borja's rainy season runs October–March, when most of the year's rain falls.
Is winter a good time to visit San Borja?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is a reasonable time to visit San Borja for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for San Borja in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, San Borja sees daytime highs around 29°C and nights near 18°C. Pack light clothes. Worth having: sun protection. About 21 days see rain.
UV index in San Borja in Winter
Clear-sky midday UV across winter averages around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Borja peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 11 at about 8 (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) | 16 | 15 | 14 | 11 | 9 | 8 | 8 | 8 | 8 | 12 | 14 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 16 | Extreme |
| Feb | 15 | Extreme |
| Mar | 14 | Extreme |
| Apr | 11 | Extreme |
| May | 9 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 8 | Very high |
| Oct | 12 | Extreme |
| Nov | 14 | Extreme |
| Dec | 13 | Extreme |
Air quality in San Borja in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in San Borja is worst in September — around 50 µg/m³ PM2.5 (poor), about 6.4× the cleanest month (May, 8 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) | 11 | 12 | 11 | 9 | 8 | 8 | 11 | 22 | 50 | 50 | 27 | 11 |
| Level | Good | Good | Good | Good | Good | Good | Good | Moderate | Poor | Poor | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 12 | Good |
| Mar | 11 | Good |
| Apr | 9 | Good |
| May | 8 | Good |
| Jun | 8 | Good |
| Jul | 11 | Good |
| Aug | 22 | Moderate |
| Sep | 50 | Poor |
| Oct | 50 | Poor |
| Nov | 27 | Moderate |
| Dec | 11 | Good |
Where is San Borja?
San Borja sits at 14.9°S, 66.7°W, 195 m above sea level, in Bolivia. The nearest listed city is Caranavi, 140 km away.
Topography around San Borja
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Borja.
Within 3 km, the terrain around San Borja has only modest variations in elevation — a maximum elevation change of 21 m around an average of 194 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 44 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,527 m.
The land around San Borja is covered by grassland (61%) and trees (28%) within 3 km, grassland (63%) and trees (30%) within 16 km, and trees (75%) and grassland (23%) 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 San Borja (-14.852°, -66.7495°, elevation 195 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.