Guastatoya in Fall
In fall (September, October and November), Guastatoya sees average daytime highs around 25°C and overnight lows near 16°C, with 391 mm of rain over about 50 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 27°C in early September to 24°C by late November. The sky is clear or mostly clear about 12% of the time across fall, and the air most often feels humid.
Fall is Guastatoya's 3rd-best season to visit on our travel score. For the whole year in context, see Guastatoya's year-round climate.
- Avg daytime high
- 25°C
- 3rd-warmest season
- Avg overnight low
- 16°C
- Rainfall
- 391 mm
- 50 wet days
- Avg wind
- 6 km/h
- Travel score
- 5.6
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Guastatoya in Fall
Over the season highs ease from about 27°C in early September to 24°C by late November.
A typical fall day in Guastatoya reaches about 25°C and drops to 16°C overnight. The warmest of the three months is September, the coolest November.
Guastatoya 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 | 24° / 13° | 6 | 2.1 | 11.2 | 8.5 |
| Feb | 26° / 13° | 4 | 1.3 | 11.5 | 8.4 |
| Mar | 28° / 14° | 12 | 3.2 | 11.9 | 7.7 |
| Apr | 29° / 16° | 41 | 7.3 | 12.3 | 6.1 |
| May | 28° / 17° | 143 | 17.7 | 12.7 | 4.9 |
| Jun | 26° / 17° | 215 | 24.3 | 12.9 | 4.2 |
| Jul | 26° / 16° | 114 | 18.7 | 12.8 | 5.2 |
| Aug | 26° / 17° | 138 | 20.1 | 12.5 | 4.9 |
| Sep | 26° / 17° | 216 | 24.9 | 12.1 | 4.1 |
| Oct | 25° / 16° | 143 | 18.8 | 11.7 | 5.3 |
| Nov | 24° / 15° | 32 | 6.1 | 11.3 | 7.5 |
| Dec | 24° / 14° | 11 | 2.6 | 11.1 | 8.4 |
Cloud cover in Fall
The sky is clear or mostly clear about 12% of the time across fall.
Chance of precipitation in Fall
Guastatoya gets around 391 mm of rain over 50 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels humid — 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 18 min in early September to 11 h 12 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 4.8 kWh/m².
Hazard calendar for Guastatoya
In fall, Guastatoya overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Guastatoya's monsoon runs May–October, when most of the year's rain falls.
Is fall a good time to visit Guastatoya?
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 reasonable time to visit Guastatoya for sightseeing.
What to pack for Guastatoya in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Guastatoya sees daytime highs around 25°C and nights near 16°C. Pack rain gear. Worth having: light clothes and sun protection. About 50 days see rain.
UV index in Guastatoya in Fall
Clear-sky midday UV across fall averages around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Guastatoya peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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) | 10 | 13 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 10 | 9 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 13 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 13 | Extreme |
| Jul | 13 | Extreme |
| Aug | 13 | Extreme |
| Sep | 13 | Extreme |
| Oct | 12 | Extreme |
| Nov | 10 | Very high |
| Dec | 9 | Very high |
Air quality in Guastatoya 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 Guastatoya is worst in April — around 55 µg/m³ PM2.5 (unhealthy), about 3.0× the cleanest month (November, 18 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) | 19 | 20 | 25 | 55 | 39 | 24 | 23 | 21 | 21 | 20 | 18 | 18 |
| Level | Moderate | Moderate | Moderate | Unhealthy | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 19 | Moderate |
| Feb | 20 | Moderate |
| Mar | 25 | Moderate |
| Apr | 55 | Unhealthy |
| May | 39 | Poor |
| Jun | 24 | Moderate |
| Jul | 23 | Moderate |
| Aug | 21 | Moderate |
| Sep | 21 | Moderate |
| Oct | 20 | Moderate |
| Nov | 18 | Moderate |
| Dec | 18 | Moderate |
Where is Guastatoya?
Guastatoya sits at 14.9°N, 90.1°W, 520 m above sea level, in Guatemala. The nearest listed city is Sanarate, 16 km away.
Topography around Guastatoya
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Guastatoya.
Within 3 km, the terrain around Guastatoya has large variations in elevation — a maximum elevation change of 682 m around an average of 638 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,805 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,984 m.
The land around Guastatoya is covered by shrubs (70%) within 3 km, shrubs (60%) and trees (24%) within 16 km, and trees (64%) within 80 km.
Guatemala travel facts
- Travel advisory
- Level 3
- Reconsider Travel
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 43% of US
- price level, 2025
- GDP per capita
- $6,598
- 2025
- Happiness
- 6.5 / 10
- World Happiness, 2025
- Safe drinking water
- 49%
- of population, 2024
- Homicide rate
- 23.4
- per 100k, 2023
- Road deaths
- 22.9
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 510
- 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 Guastatoya (14.8544°, -90.0699°, elevation 520 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.