Chalco, Mexico experiences average highs of 23°C (73°F) and lows of 12°C (54°F) throughout the year. Rainfall is frequent, averaging about 13 rainy days per month. Sunshine is abundant, averaging about 10 hours per day. Average highs have stayed broadly stable across the available records.
Chalco, Mexico Weather & Climate 2026
Monthly climate averages for Chalco, Mexico. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: May–Oct At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
7.9/10
Best: February, March, April, November
UV Index
8
High
Temperature 23°C / 12°C
Feels Like 23°C / 11°C
Rainy Days 13
Rainfall 133 mm
Sunshine 10 h
Humidity 66%
Wind Speed 10 km/h
Dew Point 11°C
Hottest Month
27°C
April
Avg Low 13°C
Rain 5 days
Coldest Month
9°C
January
Avg High 21°C
Rain 4 days
Driest Month
4 days
January
Avg High 21°C
Avg Low 9°C
Windiest Month
13 km/h
April (Gusts 35)
Worst Time to Visit
Consider avoiding June, July, August, September due to heavy rainfall.
Sun Position
Sunrise 06:06
Daylight 13.2h
Sunset 19:17
Live conditions —
Chalco on the map · live conditions
Chalco, Mexico
- Continent
- Americas
- Country
- Mexico
- City
- Chalco
- Population
- 168.7K
- Coordinates
- 19.26°, -98.90°
Seasonal Breakdown
Spring
Mar–May
Avg High 26°C
Avg Low 13°C
Rain 7 days/mo
2/3 best months
Summer
Jun–Aug
Avg High 23°C
Avg Low 13°C
Rain 25 days/mo
Autumn
Sep–Nov
Avg High 21°C
Avg Low 11°C
Rain 15 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 22°C
Avg Low 10°C
Rain 4 days/mo
1/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
High Low Shaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 21°C / 9°C . Feb: 24°C / 11°C . Mar: 26°C / 12°C . Apr: 27°C / 13°C . May: 27°C / 14°C . Jun: 24°C / 14°C . Jul: 22°C / 13°C . Aug: 22°C / 13°C . Sep: 21°C / 13°C . Oct: 21°C / 11°C . Nov: 22°C / 10°C . Dec: 21°C / 9°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 17 mm. Feb: 15 mm. Mar: 26 mm. Apr: 25 mm. May: 61 mm. Jun: 238 mm. Jul: 383 mm. Aug: 371 mm. Sep: 292 mm. Oct: 116 mm. Nov: 39 mm. Dec: 17 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 59%. Feb: 52%. Mar: 48%. Apr: 48%. May: 58%. Jun: 73%. Jul: 81%. Aug: 82%. Sep: 82%. Oct: 80%. Nov: 69%. Dec: 64%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 11 km/h . Feb: 11 km/h . Mar: 13 km/h . Apr: 13 km/h . May: 11 km/h . Jun: 10 km/h . Jul: 8 km/h . Aug: 8 km/h . Sep: 8 km/h . Oct: 9 km/h . Nov: 9 km/h . Dec: 9 km/h .
Sunshine
Sunshine
Sunshine: Jan: 10h. Feb: 10h. Mar: 11h. Apr: 11h. May: 11h. Jun: 10h. Jul: 10h. Aug: 10h. Sep: 9h. Oct: 10h. Nov: 10h. Dec: 10h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 7. Feb: UV 8. Mar: UV 9. Apr: UV 10. May: UV 10. Jun: UV 9. Jul: UV 9. Aug: UV 9. Sep: UV 9. Oct: UV 8. Nov: UV 7. Dec: UV 6.
Monthly Daylight Hours
Daylight 12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 15 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Apr 2025 · 27°C | Apr · 27°C |
| Coldest month | Jan 2025 · 10°C | Jan · 9°C |
| Wettest month | Jun 2025 · 412 mm | Jul · 383 mm |
| Windiest month | Apr 2025 · 14 km/h | Apr · 13 km/h |
Month-by-Month Weather Table
January
Good 
February best
Excellent March best
Excellent April best
Excellent May
Good June
Wet July
Wet August
Wet September
Wet October
Good November best
Excellent December
Good | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 21°C / 9°C | 20°C / 7°C | 4days (17 mm) Good | 9.8h Good | 59% Moderate | 6.7 High | Good | View Details |
| February best | 24°C / 11°C | 23°C / 9°C | 4days (15 mm) Good | 10.4h Excellent | 52% Moderate | 8 Very High | Excellent | View Details |
| March best | 26°C / 12°C | 25°C / 10°C | 5days (26 mm) Good | 10.8h Excellent | 48% Moderate | 9.2 Very High | Excellent | View Details |
| April best | 27°C / 13°C | 26°C / 12°C | 5days (25 mm) Good | 11.2h Excellent | 48% Moderate | 9.7 Very High | Excellent | View Details |
| May | 27°C / 14°C | 27°C / 14°C | 11days (61 mm) Wet | 11.3h Excellent | 58% Moderate | 9.7 Very High | Good | View Details |
| June | 24°C / 14°C | 25°C / 14°C | 19days (238 mm) Wet | 10h Excellent | 73% Muggy | 8.6 Very High | Wet | View Details |
| July | 22°C / 13°C | 25°C / 13°C | 28days (383 mm) Wet | 10.2h Excellent | 81% Humid | 8.7 Very High | Wet | View Details |
| August | 22°C / 13°C | 24°C / 13°C | 28days (371 mm) Wet | 9.8h Good | 82% Humid | 8.9 Very High | Wet | View Details |
| September | 21°C / 13°C | 23°C / 13°C | 24days (292 mm) Wet | 9.3h Good | 82% Humid | 8.6 Very High | Wet | View Details |
| October | 21°C / 11°C | 22°C / 11°C | 15days (116 mm) Wet | 9.6h Good | 80% Humid | 7.5 Very High | Good | View Details |
| November best | 22°C / 10°C | 21°C / 9°C | 6days (39 mm) Good | 9.9h Good | 69% Muggy | 7.1 Very High | Excellent | View Details |
| December | 21°C / 9°C | 20°C / 8°C | 4days (17 mm) Good | 9.8h Good | 64% Muggy | 6.4 High | Good | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Chalco are February, March, April, November, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Chalco, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Chalco is April, with average daytime highs of 27°C (80°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Chalco is January, with average overnight lows of 9°C (48°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Chalco is July, averaging 383mm of precipitation across 28 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Chalco runs through July, August, September, June, with the heaviest rainfall in July. Based on 10-year averages for Chalco.
Chalco receives approximately 122 sunshine hours per year. The sunniest month is May with around 11 hours. Based on climate data for Chalco.
The least favorable months to visit Chalco are June, July, August, September, primarily due to heavy rainfall. For the best conditions, consider February, March, April, November instead.
The annual average UV index in Chalco is 8, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Chalco is 66%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Average wind speeds in Chalco are 10 km/h (6 mph). The windiest month is April with peak winds reaching 13 km/h (8 mph) (gusts up to 35 km/h / 22 mph).
Chalco averages 6 clear-sky days per month with overall cloud cover around 56%. The clearest skies occur in February.
The annual average dew point in Chalco is 11°C (52°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Chalco has a Warm-Summer Mediterranean climate, classified as Csb under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Chalco ranges from 11°C (52°F) to 23°C (73°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
July is not the best time to visit Chalco, with a climate score of 6.8/10. Consider visiting during February, March, April, November instead for better conditions.
For July in Chalco, pack Umbrella, Waterproof jacket, Waterproof shoes, Sunscreen (SPF 30+), Sunglasses. With average highs of 22°C (72°F) and 28 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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