Guanajuato in Summer
In summer (June, July and August), Guanajuato sees average daytime highs around 26°C and overnight lows near 15°C, with 434 mm of rain over about 48 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 29°C in early June to 25°C by late August. The sky is clear or mostly clear about 26% of the time across summer, and the air most often feels dry.
Summer is Guanajuato's weakest season of the year to visit on our travel score. For the whole year in context, see Guanajuato's year-round climate.
- Avg daytime high
- 26°C
- 2nd-warmest season
- Avg overnight low
- 15°C
- Rainfall
- 434 mm
- 48 wet days
- Avg wind
- 9 km/h
- Travel score
- 5.6
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Guanajuato in Summer
Over the season highs ease from about 29°C in early June to 25°C by late August.
A typical summer day in Guanajuato reaches about 26°C and drops to 15°C overnight. The warmest of the three months is June, the coolest July.
Guanajuato 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 | 22° / 7° | 13 | 2.4 | 10.9 | 8.1 |
| Feb | 24° / 9° | 13 | 2 | 11.3 | 8.6 |
| Mar | 26° / 11° | 13 | 2.2 | 11.9 | 8.3 |
| Apr | 29° / 13° | 14 | 3 | 12.5 | 6.9 |
| May | 29° / 15° | 48 | 8.5 | 13 | 5.8 |
| Jun | 28° / 15° | 133 | 14.3 | 13.3 | 5.5 |
| Jul | 26° / 14° | 160 | 17.7 | 13.1 | 5.6 |
| Aug | 26° / 14° | 141 | 15.9 | 12.7 | 5.8 |
| Sep | 25° / 14° | 131 | 14.4 | 12.1 | 6.1 |
| Oct | 25° / 12° | 47 | 7 | 11.5 | 7.5 |
| Nov | 24° / 10° | 13 | 2.5 | 11 | 8.6 |
| Dec | 22° / 8° | 6 | 1.4 | 10.7 | 8.4 |
Cloud cover in Summer
The sky is clear or mostly clear about 26% of the time across summer.
Chance of precipitation in Summer
Guanajuato gets around 434 mm of rain over 48 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 9 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 12 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 6.5 kWh/m².
Hazard calendar for Guanajuato
In summer, Guanajuato overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Guanajuato's rainy season runs June–September, when most of the year's rain falls.
Is summer a good time to visit Guanajuato?
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 reasonable time to visit Guanajuato for sightseeing.
What to pack for Guanajuato in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Guanajuato sees daytime highs around 26°C and nights near 15°C. Pack light clothes, rain gear and sun protection. About 48 days see rain.
UV index in Guanajuato 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 Guanajuato peaks around June 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (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 | 10 | 13 | 14 | 13 | 14 | 12 | 14 | 12 | 11 | 8 | 7 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Extreme |
| Mar | 13 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 14 | Extreme |
| Jul | 12 | Extreme |
| Aug | 14 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 8 | Very high |
| Dec | 7 | Very high |
Air quality in Guanajuato 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 Guanajuato is worst in May — around 21 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 19 | 17 | 17 | 17 | 21 | 15 | 17 | 15 | 16 | 13 | 16 | 20 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 19 | Moderate |
| Feb | 17 | Moderate |
| Mar | 17 | Moderate |
| Apr | 17 | Moderate |
| May | 21 | Moderate |
| Jun | 15 | Moderate |
| Jul | 17 | Moderate |
| Aug | 15 | Moderate |
| Sep | 16 | Moderate |
| Oct | 13 | Moderate |
| Nov | 16 | Moderate |
| Dec | 20 | Moderate |
Where is Guanajuato?
Guanajuato sits at 21.0°N, 101.3°W, 2,010 m above sea level, in Mexico. The nearest listed city is Marfil, 4.0 km away.
Topography around Guanajuato
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Guanajuato.
Within 3 km, the terrain around Guanajuato has significant variations in elevation — a maximum elevation change of 488 m around an average of 2,135 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,169 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,273 m.
The land around Guanajuato is covered by shrubs (49%) and artificial surfaces (25%) within 3 km, shrubs (44%), trees (23%) and grassland (21%) within 16 km, and shrubs (39%) and cropland (34%) 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 Guanajuato (21.0186°, -101.2591°, elevation 2,010 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.