San Lorenzo in Fall
In fall (September, October and November), San Lorenzo sees average daytime highs around 23°C and overnight lows near 15°C, with 1032 mm of rain over about 83 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 24°C in early September to 22°C by late November. The sky is clear or mostly clear about 1% of the time across fall, and the air most often feels comfortable.
Fall is San Lorenzo's 2nd-best season to visit on our travel score. San Lorenzo 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 San Lorenzo's year-round climate.
- Avg daytime high
- 23°C
- 2nd-warmest season
- Avg overnight low
- 15°C
- Rainfall
- 1032 mm
- 83 wet days
- Avg wind
- 3 km/h
- Travel score
- 3.8
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in San Lorenzo in Fall
Over the season highs ease from about 24°C in early September to 22°C by late November.
A typical fall day in San Lorenzo reaches about 23°C and drops to 15°C overnight. The warmest of the three months is September, the coolest September.
San Lorenzo weather by month
How the three fall months (September, October and November) 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 | 22° / 15° | 342 | 29.2 | 11.9 | 3.7 |
| Feb | 23° / 15° | 343 | 26.3 | 12 | 3.6 |
| Mar | 23° / 15° | 401 | 29.6 | 12 | 3.6 |
| Apr | 23° / 15° | 441 | 29.3 | 12 | 3.5 |
| May | 23° / 15° | 392 | 29.1 | 12.1 | 3.6 |
| Jun | 23° / 15° | 270 | 24.3 | 12.1 | 4.3 |
| Jul | 24° / 15° | 181 | 20.1 | 12.1 | 5.2 |
| Aug | 24° / 15° | 147 | 18.4 | 12 | 5.4 |
| Sep | 24° / 15° | 258 | 24.5 | 12 | 4.3 |
| Oct | 23° / 15° | 381 | 29.6 | 12 | 3.6 |
| Nov | 22° / 15° | 393 | 28.9 | 11.9 | 3.4 |
| Dec | 22° / 15° | 388 | 29.6 | 11.9 | 3.6 |
Cloud cover in Fall
The sky is clear or mostly clear about 1% of the time across fall.
Chance of precipitation in Fall
San Lorenzo gets around 1032 mm of rain over 83 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 3 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 hours in early September to 11 h 54 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 5.1 kWh/m².
Is fall a good time to visit San Lorenzo?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a weaker month for outdoor sightseeing in San Lorenzo.
What to pack for San Lorenzo in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, San Lorenzo sees daytime highs around 23°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 83 days see rain.
UV index in San Lorenzo in Fall
Clear-sky midday UV across fall averages around 14 (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 Lorenzo peaks around February 19 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 12 (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) | 15 | 16 | 16 | 14 | 15 | 13 | 12 | 12 | 14 | 14 | 13 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 16 | Extreme |
| Mar | 16 | Extreme |
| Apr | 14 | Extreme |
| May | 15 | Extreme |
| Jun | 13 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 14 | Extreme |
| Oct | 14 | Extreme |
| Nov | 13 | Extreme |
| Dec | 13 | Extreme |
Air quality in San Lorenzo in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in San Lorenzo is worst in March — around 18 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (July, 11 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) | 14 | 18 | 18 | 16 | 13 | 11 | 11 | 14 | 17 | 15 | 14 | 14 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 14 | Moderate |
| Feb | 18 | Moderate |
| Mar | 18 | Moderate |
| Apr | 16 | Moderate |
| May | 13 | Moderate |
| Jun | 11 | Good |
| Jul | 11 | Good |
| Aug | 14 | Moderate |
| Sep | 17 | Moderate |
| Oct | 15 | Moderate |
| Nov | 14 | Moderate |
| Dec | 14 | Moderate |
Where is San Lorenzo?
San Lorenzo sits at 1.5°N, 77.2°W, 2,074 m above sea level, in Colombia. The nearest listed city is La Unión, 15 km away.
Topography around San Lorenzo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Lorenzo.
Within 3 km, the terrain around San Lorenzo has very significant variations in elevation — a maximum elevation change of 1,424 m around an average of 2,225 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,258 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,121 m.
The land around San Lorenzo is covered by trees (63%) and grassland (35%) within 3 km, trees (51%) and grassland (48%) within 16 km, and trees (76%) and grassland (23%) within 80 km.
Colombia travel facts
- Travel advisory
- Level 3
- Reconsider Travel
- Power plugs
- Type A / B
- 120 / 240 V · 60 Hz
- Prices
- ≈ 38% of US
- price level, 2025
- GDP per capita
- $8,562
- 2025
- Happiness
- 6.0 / 10
- World Happiness, 2025
- Safe drinking water
- 74%
- of population, 2024
- Homicide rate
- 24.9
- per 100k, 2023
- Road deaths
- 15.4
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 480
- 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 Lorenzo (1.5029°, -77.2154°, elevation 2,074 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.