Zacatlán in Summer
In summer (June, July and August), Zacatlán sees average daytime highs around 21°C and overnight lows near 13°C, with 823 mm of rain over about 83 wet days across the season. It is the 2nd-warmest season and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 21°C. The sky is clear or mostly clear about 6% of the time across summer, and the air most often feels comfortable.
Summer is Zacatlán's weakest season of the year to visit on our travel score. For the whole year in context, see Zacatlán's year-round climate.
- Avg daytime high
- 21°C
- 2nd-warmest season
- Avg overnight low
- 13°C
- Rainfall
- 823 mm
- 83 wet days
- Avg wind
- 5 km/h
- Travel score
- 3.8
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Zacatlán in Summer
Across summer, daytime highs hold fairly steady around 21°C.
A typical summer day in Zacatlán reaches about 21°C and drops to 13°C overnight. The warmest of the three months is June, the coolest July.
Zacatlán weather by month
How the three summer months (June, July and August) 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 | 17° / 7° | 64 | 12.5 | 10.9 | 5.1 |
| Feb | 19° / 8° | 64 | 12 | 11.3 | 5.6 |
| Mar | 20° / 9° | 97 | 16.5 | 11.9 | 5.5 |
| Apr | 22° / 11° | 135 | 19.4 | 12.4 | 5.2 |
| May | 23° / 12° | 139 | 20.8 | 12.9 | 5.2 |
| Jun | 22° / 13° | 279 | 24.2 | 13.2 | 4.3 |
| Jul | 21° / 13° | 269 | 29.5 | 13.1 | 3.6 |
| Aug | 21° / 13° | 275 | 28.9 | 12.7 | 3.6 |
| Sep | 21° / 13° | 319 | 26.7 | 12.1 | 3.8 |
| Oct | 20° / 11° | 248 | 20.7 | 11.5 | 4.6 |
| Nov | 18° / 9° | 118 | 15.3 | 11.1 | 5.1 |
| Dec | 17° / 7° | 60 | 12.4 | 10.8 | 5.3 |
Cloud cover in Summer
The sky is clear or mostly clear about 6% of the time across summer.
Chance of precipitation in Summer
Zacatlán gets around 823 mm of rain over 83 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 5 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 06 min in early June to 12 h 24 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.5 kWh/m².
Hazard calendar for Zacatlán
In summer, Zacatlán overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Zacatlán's rainy season runs June–October, when most of the year's rain falls.
Is summer a good time to visit Zacatlán?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Zacatlán.
What to pack for Zacatlán in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Zacatlán sees daytime highs around 21°C and nights near 13°C. Pack rain gear. Worth having: sun protection. About 83 days see rain.
UV index in Zacatlán in Summer
Clear-sky midday UV across summer averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Zacatlán peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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) | 8 | 11 | 13 | 14 | 10 | 14 | 12 | 14 | 11 | 10 | 8 | 8 |
| Level | Very high | Extreme | Extreme | Extreme | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 11 | Extreme |
| Mar | 13 | Extreme |
| Apr | 14 | Extreme |
| May | 10 | Very high |
| Jun | 14 | Extreme |
| Jul | 12 | Extreme |
| Aug | 14 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Extreme |
| Nov | 8 | Very high |
| Dec | 8 | Very high |
Air quality in Zacatlán in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Zacatlán is worst in December — around 95 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (September, 49 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) | 88 | 89 | 85 | 90 | 85 | 59 | 56 | 52 | 49 | 52 | 70 | 95 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Poor | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 88 | Unhealthy |
| Feb | 89 | Unhealthy |
| Mar | 85 | Unhealthy |
| Apr | 90 | Unhealthy |
| May | 85 | Unhealthy |
| Jun | 59 | Unhealthy |
| Jul | 56 | Unhealthy |
| Aug | 52 | Poor |
| Sep | 49 | Poor |
| Oct | 52 | Poor |
| Nov | 70 | Unhealthy |
| Dec | 95 | Unhealthy |
Where is Zacatlán?
Zacatlán sits at 19.9°N, 98.0°W, 2,048 m above sea level, in Mexico. The nearest listed city is Chignahuapan, 13 km away.
Topography around Zacatlán
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Zacatlán.
Within 3 km, the terrain around Zacatlán has large variations in elevation — a maximum elevation change of 769 m around an average of 2,049 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,999 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,363 m.
The land around Zacatlán is covered by trees (48%) and cropland (20%) within 3 km, trees (67%) within 16 km, and trees (50%) and cropland (23%) 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 Zacatlán (19.9355°, -97.9613°, elevation 2,048 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.