San Martín in Fall
In fall (September, October and November), San Martín sees average daytime highs around 28°C and overnight lows near 21°C, with 1336 mm of rain over about 89 wet days across the season. It is the coldest season of the year and the 3rd-wettest season.
Across fall, daytime highs hold fairly steady around 28°C. The sky is clear or mostly clear about 0% of the time across fall, and the air most often feels oppressive.
Fall is San Martín's 2nd-best season to visit on our travel score. San Martín 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 Martín's year-round climate.
- Avg daytime high
- 28°C
- coldest season of the year
- Avg overnight low
- 21°C
- Rainfall
- 1336 mm
- 89 wet days
- Avg wind
- 4 km/h
- Travel score
- 3.3
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in San Martín in Fall
Across fall, daytime highs hold fairly steady around 28°C.
A typical fall day in San Martín reaches about 28°C and drops to 21°C overnight. The warmest of the three months is September, the coolest September.
San Martín 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 | 29° / 21° | 111 | 20.2 | 11.6 | 4.5 |
| Feb | 29° / 21° | 143 | 18.7 | 11.7 | 4.1 |
| Mar | 29° / 22° | 275 | 26.6 | 11.9 | 3.4 |
| Apr | 28° / 22° | 478 | 29.6 | 12.2 | 2.9 |
| May | 28° / 22° | 644 | 30.7 | 12.4 | 3.0 |
| Jun | 28° / 21° | 617 | 29.8 | 12.5 | 3.1 |
| Jul | 28° / 21° | 591 | 30.8 | 12.4 | 3.2 |
| Aug | 28° / 21° | 588 | 31 | 12.3 | 3.1 |
| Sep | 28° / 21° | 506 | 29.8 | 12 | 3.2 |
| Oct | 28° / 21° | 452 | 30.1 | 11.8 | 3.3 |
| Nov | 28° / 21° | 378 | 29 | 11.6 | 3.3 |
| Dec | 28° / 21° | 206 | 26.2 | 11.5 | 3.8 |
Cloud cover in Fall
The sky is clear or mostly clear about 0% of the time across fall.
Chance of precipitation in Fall
San Martín gets around 1336 mm of rain over 89 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 4 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 12 min in early September to 11 h 36 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 4.7 kWh/m².
Is fall a good time to visit San Martín?
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 Martín.
What to pack for San Martín in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, San Martín sees daytime highs around 28°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 89 days see rain.
UV index in San Martín in Fall
Clear-sky midday UV across fall averages around 12 (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 Martín peaks around February 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 10 (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) | 11 | 13 | 12 | 11 | 12 | 13 | 12 | 12 | 13 | 12 | 10 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 13 | Extreme |
| Mar | 12 | Extreme |
| Apr | 11 | Extreme |
| May | 12 | Extreme |
| Jun | 13 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 13 | Extreme |
| Oct | 12 | Extreme |
| Nov | 10 | Extreme |
| Dec | 10 | Very high |
Air quality in San Martín 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 Martín is worst in March — around 46 µg/m³ PM2.5 (poor), about 3.7× the cleanest month (December, 13 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) | 16 | 26 | 46 | 32 | 23 | 21 | 21 | 19 | 16 | 14 | 13 | 13 |
| Level | Moderate | Moderate | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 26 | Moderate |
| Mar | 46 | Poor |
| Apr | 32 | Moderate |
| May | 23 | Moderate |
| Jun | 21 | Moderate |
| Jul | 21 | Moderate |
| Aug | 19 | Moderate |
| Sep | 16 | Moderate |
| Oct | 14 | Moderate |
| Nov | 13 | Moderate |
| Dec | 13 | Moderate |
Where is San Martín?
San Martín sits at 8.0°N, 73.5°W, 112 m above sea level, in Colombia. The nearest listed city is Ocaña, 31 km away.
Topography around San Martín
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Martín.
Within 3 km, the terrain around San Martín has only modest variations in elevation — a maximum elevation change of 53 m around an average of 105 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,315 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,956 m.
The land around San Martín is covered by grassland (63%) and trees (32%) within 3 km, grassland (58%) and trees (41%) within 16 km, and trees (58%) and grassland (40%) 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 Martín (8.0018°, -73.5114°, elevation 112 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.