La Fortuna in Fall
In fall (September, October and November), La Fortuna sees average daytime highs around 27°C and overnight lows near 21°C, with 897 mm of rain over about 85 wet days across the season. It is the 3rd-warmest season and the wettest season of the year.
Over the season highs ease from about 28°C in early September to 26°C by late November. The sky is clear or mostly clear about 2% of the time across fall, and the air most often feels oppressive.
Fall is La Fortuna's 3rd-best season to visit on our travel score. La Fortuna 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 La Fortuna's year-round climate.
- Avg daytime high
- 27°C
- 3rd-warmest season
- Avg overnight low
- 21°C
- Rainfall
- 897 mm
- 85 wet days
- Avg wind
- 6 km/h
- Travel score
- 3.5
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in La Fortuna in Fall
Over the season highs ease from about 28°C in early September to 26°C by late November.
A typical fall day in La Fortuna reaches about 27°C and drops to 21°C overnight. The warmest of the three months is September, the coolest November.
La Fortuna 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 | 26° / 19° | 110 | 15.3 | 11.5 | 6.1 |
| Feb | 26° / 19° | 54 | 8.1 | 11.7 | 7.1 |
| Mar | 28° / 20° | 32 | 6.6 | 11.9 | 7.0 |
| Apr | 29° / 21° | 52 | 10 | 12.2 | 5.5 |
| May | 28° / 21° | 255 | 24.6 | 12.5 | 3.7 |
| Jun | 28° / 21° | 304 | 28.8 | 12.6 | 3.3 |
| Jul | 27° / 21° | 260 | 28.1 | 12.6 | 3.6 |
| Aug | 28° / 21° | 243 | 28.5 | 12.3 | 3.5 |
| Sep | 28° / 21° | 288 | 29 | 12.1 | 3.3 |
| Oct | 27° / 21° | 319 | 29.7 | 11.8 | 3.4 |
| Nov | 26° / 20° | 291 | 26 | 11.5 | 3.9 |
| Dec | 26° / 20° | 197 | 21.9 | 11.4 | 4.9 |
Cloud cover in Fall
The sky is clear or mostly clear about 2% of the time across fall.
Chance of precipitation in Fall
La Fortuna gets around 897 mm of rain over 85 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 6 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 12 min in early September to 11 h 24 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 3.9 kWh/m².
Is fall a good time to visit La Fortuna?
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 La Fortuna.
What to pack for La Fortuna in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, La Fortuna sees daytime highs around 27°C and nights near 21°C. Pack light clothes and rain gear. About 85 days see rain.
Sea temperature near La Fortuna in Fall
The nearest coast averages about 28°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 66 km away) is warmest in April at about 29°C and coldest in November near 28°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 29 | Tropical |
| Feb | 29 | Tropical |
| Mar | 29 | Tropical |
| Apr | 29 | Tropical |
| May | 29 | Tropical |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 28 | Tropical |
| Nov | 28 | Warm |
| Dec | 28 | Tropical |
UV index in La Fortuna 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 La Fortuna peaks around March 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 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 | 14 | 14 | 14 | 13 | 13 | 12 | 13 | 13 | 12 | 11 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 14 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 13 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 12 | Extreme |
| Nov | 11 | Extreme |
| Dec | 10 | Very high |
Air quality in La Fortuna 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 La Fortuna is worst in May — around 23 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (January, 10 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) | 10 | 11 | 13 | 21 | 23 | 21 | 22 | 20 | 18 | 15 | 12 | 10 |
| Level | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 11 | Good |
| Mar | 13 | Moderate |
| Apr | 21 | Moderate |
| May | 23 | Moderate |
| Jun | 21 | Moderate |
| Jul | 22 | Moderate |
| Aug | 20 | Moderate |
| Sep | 18 | Moderate |
| Oct | 15 | Moderate |
| Nov | 12 | Good |
| Dec | 10 | Good |
Where is La Fortuna?
La Fortuna sits at 10.5°N, 84.6°W, 0 m above sea level, in Costa Rica. The nearest listed city is Monteverde, 26 km away.
Topography around La Fortuna
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of La Fortuna.
Within 3 km, the terrain around La Fortuna has significant variations in elevation — a maximum elevation change of 281 m around an average of 270 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,738 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,891 m.
The land around La Fortuna is covered by grassland (55%) and trees (42%) within 3 km, trees (63%) and grassland (35%) within 16 km, and trees (63%) and grassland (26%) within 80 km.
Costa Rica travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 59% of US
- price level, 2025
- GDP per capita
- $19,970
- 2025
- Happiness
- 7.4 / 10
- World Happiness, 2025
- Safe drinking water
- 81%
- of population, 2024
- Homicide rate
- 17.7
- per 100k, 2023
- Road deaths
- 14.8
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 516
- 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 La Fortuna (10.4709°, -84.6453°, elevation 0 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.