El Grullo in Summer
In summer (June, July and August), El Grullo sees average daytime highs around 28°C and overnight lows near 18°C, with 575 mm of rain over about 79 wet days across the season. It is the 2nd-warmest season and the wettest season of the year.
Over the season highs ease from about 31°C in early June to 28°C by late August. The sky is clear or mostly clear about 9% of the time across summer, and the air most often feels muggy.
Summer is El Grullo's weakest season of the year to visit on our travel score. For the whole year in context, see El Grullo's year-round climate.
- Avg daytime high
- 28°C
- 2nd-warmest season
- Avg overnight low
- 18°C
- Rainfall
- 575 mm
- 79 wet days
- Avg wind
- 4 km/h
- Travel score
- 3.7
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in El Grullo in Summer
Over the season highs ease from about 31°C in early June to 28°C by late August.
A typical summer day in El Grullo reaches about 28°C and drops to 18°C overnight. The warmest of the three months is June, the coolest August.
How summer really feels in El Grullo
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
El Grullo 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 | 27° / 12° | 27 | 2 | 10.9 | 8.1 |
| Feb | 28° / 12° | 21 | 1.7 | 11.3 | 7.5 |
| Mar | 30° / 13° | 12 | 1.3 | 11.9 | 6.6 |
| Apr | 31° / 14° | 5 | 1 | 12.4 | 5.5 |
| May | 32° / 17° | 21 | 5.3 | 12.9 | 4.7 |
| Jun | 29° / 19° | 163 | 21.9 | 13.2 | 3.8 |
| Jul | 28° / 18° | 202 | 28.4 | 13.1 | 3.6 |
| Aug | 28° / 18° | 211 | 28.6 | 12.7 | 3.6 |
| Sep | 28° / 18° | 216 | 26 | 12.1 | 3.9 |
| Oct | 28° / 17° | 99 | 15.1 | 11.5 | 5.5 |
| Nov | 28° / 15° | 24 | 4.2 | 11.1 | 7.4 |
| Dec | 27° / 12° | 14 | 1.8 | 10.8 | 8.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 9% of the time across summer.
Chance of precipitation in Summer
El Grullo gets around 575 mm of rain over 79 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 4 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 5.3 kWh/m².
Hazard calendar for El Grullo
In summer, El Grullo overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
El Grullo's monsoon runs June–October, when most of the year's rain falls.
Is summer a good time to visit El Grullo?
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 El Grullo.
What to pack for El Grullo in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, El Grullo sees daytime highs around 28°C and nights near 18°C. Pack light clothes and rain gear. Worth having: sun protection. About 79 days see rain.
UV index in El Grullo in Summer
Clear-sky midday UV across summer 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 El Grullo peaks around April 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (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 | 13 | 13 | 12 | 12 | 12 | 12 | 10 | 8 | 7 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 11 | Extreme |
| Mar | 13 | Extreme |
| Apr | 13 | Extreme |
| May | 13 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 12 | Extreme |
| Sep | 12 | Extreme |
| Oct | 10 | Very high |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in El Grullo 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 El Grullo is worst in May — around 48 µg/m³ PM2.5 (poor), about 5.2× the cleanest month (February, 9 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 | 9 | 10 | 20 | 48 | 20 | 12 | 10 | 10 | 10 | 10 | 10 |
| Level | Good | Good | Good | Moderate | Poor | Moderate | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 9 | Good |
| Mar | 10 | Good |
| Apr | 20 | Moderate |
| May | 48 | Poor |
| Jun | 20 | Moderate |
| Jul | 12 | Good |
| Aug | 10 | Good |
| Sep | 10 | Good |
| Oct | 10 | Good |
| Nov | 10 | Good |
| Dec | 10 | Good |
Where is El Grullo?
El Grullo sits at 19.8°N, 104.2°W, 853 m above sea level, in Mexico. The nearest listed city is Autlán de Navarro, 16 km away.
Topography around El Grullo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of El Grullo.
Within 3 km, the terrain around El Grullo has significant variations in elevation — a maximum elevation change of 423 m around an average of 914 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,342 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,211 m.
The land around El Grullo is covered by cropland (37%) and trees (34%) within 3 km, trees (39%) and shrubs (25%) within 16 km, and trees (65%) 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 El Grullo (19.8067°, -104.2163°, elevation 853 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.