Ajalpan in Fall
In fall (September, October and November), Ajalpan sees average daytime highs around 22°C and overnight lows near 12°C, with 294 mm of rain over about 42 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 23°C in early September to 21°C by late November. The sky is clear or mostly clear about 19% of the time across fall, and the air most often feels comfortable.
Fall is Ajalpan's 3rd-best season to visit on our travel score. For the whole year in context, see Ajalpan's year-round climate.
- Avg daytime high
- 22°C
- 3rd-warmest season
- Avg overnight low
- 12°C
- Rainfall
- 294 mm
- 42 wet days
- Avg wind
- 7 km/h
- Travel score
- 5.9
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Ajalpan in Fall
Over the season highs ease from about 23°C in early September to 21°C by late November.
A typical fall day in Ajalpan reaches about 22°C and drops to 12°C overnight. The warmest of the three months is September, the coolest November.
Ajalpan 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 | 20° / 8° | 14 | 4.2 | 11 | 7.3 |
| Feb | 22° / 9° | 13 | 4.2 | 11.4 | 7.8 |
| Mar | 24° / 11° | 22 | 6.3 | 11.9 | 7.9 |
| Apr | 25° / 13° | 45 | 10.5 | 12.4 | 6.9 |
| May | 25° / 14° | 92 | 17.4 | 12.9 | 5.8 |
| Jun | 24° / 14° | 157 | 19.9 | 13.1 | 5.2 |
| Jul | 23° / 13° | 106 | 15.1 | 13 | 5.9 |
| Aug | 24° / 13° | 113 | 16.5 | 12.6 | 5.8 |
| Sep | 23° / 14° | 161 | 19.6 | 12.1 | 5.1 |
| Oct | 22° / 12° | 98 | 14.3 | 11.6 | 5.9 |
| Nov | 21° / 10° | 35 | 8.3 | 11.1 | 6.8 |
| Dec | 20° / 9° | 13 | 4.1 | 10.9 | 7.4 |
Cloud cover in Fall
The sky is clear or mostly clear about 19% of the time across fall.
Chance of precipitation in Fall
Ajalpan gets around 294 mm of rain over 42 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 7 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 24 min in early September to 11 hours 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 4.9 kWh/m².
Hazard calendar for Ajalpan
In fall, Ajalpan overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Ajalpan's rainy season runs May–October, when most of the year's rain falls.
Is fall a good time to visit Ajalpan?
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 Ajalpan for sightseeing.
What to pack for Ajalpan in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Ajalpan sees daytime highs around 22°C and nights near 12°C. Pack rain gear. Worth having: light clothes and sun protection. About 42 days see rain.
UV index in Ajalpan 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 Ajalpan peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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) | 9 | 12 | 13 | 15 | 9 | 13 | 12 | 14 | 13 | 11 | 9 | 8 |
| Level | Very high | Extreme | Extreme | Extreme | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 12 | Extreme |
| Mar | 13 | Extreme |
| Apr | 15 | Extreme |
| May | 9 | Very high |
| Jun | 13 | Extreme |
| Jul | 12 | Extreme |
| Aug | 14 | Extreme |
| Sep | 13 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 8 | Very high |
Air quality in Ajalpan 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 Ajalpan is worst in May — around 38 µg/m³ PM2.5 (poor), about 1.9× the cleanest month (January, 20 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) | 20 | 20 | 23 | 29 | 38 | 30 | 25 | 22 | 25 | 22 | 22 | 23 |
| Level | Moderate | Moderate | Moderate | Moderate | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 20 | Moderate |
| Feb | 20 | Moderate |
| Mar | 23 | Moderate |
| Apr | 29 | Moderate |
| May | 38 | Poor |
| Jun | 30 | Moderate |
| Jul | 25 | Moderate |
| Aug | 22 | Moderate |
| Sep | 25 | Moderate |
| Oct | 22 | Moderate |
| Nov | 22 | Moderate |
| Dec | 23 | Moderate |
Where is Ajalpan?
Ajalpan sits at 18.4°N, 97.3°W, 1,223 m above sea level, in Mexico. The nearest listed city is Altepexi, 4.0 km away.
Topography around Ajalpan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ajalpan.
Within 3 km, the terrain around Ajalpan has significant variations in elevation — a maximum elevation change of 271 m around an average of 1,226 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,948 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,498 m.
The land around Ajalpan is covered by shrubs (42%), cropland (23%) and artificial surfaces (20%) within 3 km, shrubs (61%) within 16 km, and shrubs (42%) and trees (37%) within 80 km.
Mexico travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 120 / 127 V · 60 Hz
- Prices
- ≈ 54% of US
- price level, 2025
- GDP per capita
- $13,889
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 43%
- of population, 2024
- Homicide rate
- 24.9
- per 100k, 2023
- Road deaths
- 12.8
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 440
- 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 Ajalpan (18.3791°, -97.2587°, elevation 1,223 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.