San Francisco Tlalcilalcalpan in Summer
In summer (June, July and August), San Francisco Tlalcilalcalpan sees average daytime highs around 20°C and overnight lows near 9°C, with 703 mm of rain over about 75 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 21°C in early June to 19°C by late August. The sky is clear or mostly clear about 5% of the time across summer, and the air most often feels dry.
Summer is San Francisco Tlalcilalcalpan's weakest season of the year to visit on our travel score. For the whole year in context, see San Francisco Tlalcilalcalpan's year-round climate.
- Avg daytime high
- 20°C
- 2nd-warmest season
- Avg overnight low
- 9°C
- Rainfall
- 703 mm
- 75 wet days
- Avg wind
- 5 km/h
- Travel score
- 4.0
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in San Francisco Tlalcilalcalpan in Summer
Over the season highs ease from about 21°C in early June to 19°C by late August.
A typical summer day in San Francisco Tlalcilalcalpan reaches about 20°C and drops to 9°C overnight. The warmest of the three months is June, the coolest July.
San Francisco Tlalcilalcalpan 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° / 4° | 27 | 4.9 | 11 | 6.5 |
| Feb | 19° / 5° | 25 | 5.1 | 11.3 | 7.2 |
| Mar | 20° / 6° | 29 | 6.6 | 11.9 | 7.3 |
| Apr | 22° / 8° | 47 | 8.5 | 12.4 | 7.0 |
| May | 22° / 9° | 113 | 16.2 | 12.9 | 5.8 |
| Jun | 21° / 9° | 204 | 21.6 | 13.1 | 4.5 |
| Jul | 19° / 9° | 257 | 27.1 | 13 | 3.7 |
| Aug | 19° / 9° | 242 | 26.3 | 12.7 | 3.7 |
| Sep | 19° / 9° | 204 | 23 | 12.1 | 4.1 |
| Oct | 19° / 8° | 95 | 14.2 | 11.6 | 5.4 |
| Nov | 19° / 5° | 35 | 6.4 | 11.1 | 6.7 |
| Dec | 18° / 4° | 15 | 3.1 | 10.9 | 6.9 |
Cloud cover in Summer
The sky is clear or mostly clear about 5% of the time across summer.
Chance of precipitation in Summer
San Francisco Tlalcilalcalpan gets around 703 mm of rain over 75 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 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 San Francisco Tlalcilalcalpan
In summer, San Francisco Tlalcilalcalpan overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
San Francisco Tlalcilalcalpan's monsoon runs June–September, when most of the year's rain falls.
Is summer a good time to visit San Francisco Tlalcilalcalpan?
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 San Francisco Tlalcilalcalpan.
What to pack for San Francisco Tlalcilalcalpan in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, San Francisco Tlalcilalcalpan sees daytime highs around 20°C and nights near 9°C. Pack rain gear. Worth having: sun protection. About 75 days see rain.
UV index in San Francisco Tlalcilalcalpan 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 San Francisco Tlalcilalcalpan peaks around March 23 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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) | 10 | 12 | 15 | 14 | 12 | 15 | 12 | 13 | 11 | 11 | 9 | 8 |
| 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 | 12 | Extreme |
| Mar | 15 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 15 | Extreme |
| Jul | 12 | Extreme |
| Aug | 13 | Extreme |
| Sep | 11 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 8 | Very high |
Air quality in San Francisco Tlalcilalcalpan 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 San Francisco Tlalcilalcalpan is worst in December — around 79 µg/m³ PM2.5 (unhealthy), 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) | 67 | 62 | 55 | 52 | 57 | 59 | 69 | 65 | 70 | 66 | 77 | 79 |
| Level | Unhealthy | Unhealthy | Poor | Poor | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 67 | Unhealthy |
| Feb | 62 | Unhealthy |
| Mar | 55 | Poor |
| Apr | 52 | Poor |
| May | 57 | Unhealthy |
| Jun | 59 | Unhealthy |
| Jul | 69 | Unhealthy |
| Aug | 65 | Unhealthy |
| Sep | 70 | Unhealthy |
| Oct | 66 | Unhealthy |
| Nov | 77 | Unhealthy |
| Dec | 79 | Unhealthy |
Where is San Francisco Tlalcilalcalpan?
San Francisco Tlalcilalcalpan sits at 19.3°N, 99.8°W, 2,769 m above sea level, in Mexico. The nearest listed city is San Antonio Acahualco, 2.0 km away.
Topography around San Francisco Tlalcilalcalpan
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Francisco Tlalcilalcalpan.
Within 3 km, the terrain around San Francisco Tlalcilalcalpan has only modest variations in elevation — a maximum elevation change of 163 m around an average of 2,764 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,280 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,046 m.
The land around San Francisco Tlalcilalcalpan is covered by cropland (42%), artificial surfaces (28%) and grassland (25%) within 3 km, cropland (34%), trees (24%) and grassland (23%) within 16 km, and trees (48%) 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 San Francisco Tlalcilalcalpan (19.2947°, -99.7677°, elevation 2,769 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.