Chalco, México Weather by Month and Climate Averages

How much rain does Chalco get?

Chalco gets 468 mm of precipitation in an average year, spread over about 65 days with measurable rain. That is more rainy days than 53% of Mexico.

July is the wettest month, with 108 mm. December is the driest, with 3 mm. July has the most rainy days, about 14.

The longest dry spell in the last five years lasted 50 days, to March 14, 2023.

Chalco weather by month

Chalco weather in January

In January, Chalco averages a high of 23°C and a low of 8°C. It gets 4 mm of precipitation over about 1 rainy days. The sun is out about 62% of daylight hours. The January record high is 29°C (2024) and the record low is -2°C (1988). January is one of the most comfortable months to visit.

Chalco weather in February

In February, Chalco averages a high of 24°C and a low of 9°C. It gets 3 mm of precipitation over about 1 rainy days. The sun is out about 80% of daylight hours. The February record high is 31°C (2024) and the record low is 0°C (1976). February is one of the most comfortable months to visit.

Chalco weather in March

In March, Chalco averages a high of 27°C and a low of 11°C. It gets 6 mm of precipitation over about 2 rainy days. The sun is out about 74% of daylight hours. The March record high is 33°C (1991) and the record low is 0°C (1978). March is one of the most comfortable months to visit.

Chalco weather in April

In April, Chalco averages a high of 28°C and a low of 13°C. It gets 16 mm of precipitation over about 4 rainy days. The sun is out about 62% of daylight hours. The April record high is 37°C (2026) and the record low is 4°C (1983).

Chalco weather in May

In May, Chalco averages a high of 28°C and a low of 14°C. It gets 30 mm of precipitation over about 6 rainy days. The sun is out about 55% of daylight hours. The May record high is 41°C (2026) and the record low is 7°C (2014).

Chalco weather in June

In June, Chalco averages a high of 26°C and a low of 14°C. It gets 72 mm of precipitation over about 9 rainy days. The sun is out about 32% of daylight hours. The June record high is 38°C (2026) and the record low is 7°C (1979). June is one of the most comfortable months to visit.

Chalco weather in July

In July, Chalco averages a high of 24°C and a low of 13°C. It gets 108 mm of precipitation over about 14 rainy days. The sun is out about 17% of daylight hours. The July record high is 37°C (2026) and the record low is 8°C (1985).

Chalco weather in August

In August, Chalco averages a high of 24°C and a low of 13°C. It gets 94 mm of precipitation over about 12 rainy days. The sun is out about 17% of daylight hours. The August record high is 37°C (2026) and the record low is 9°C (1979). August is one of the most comfortable months to visit.

Chalco weather in September

In September, Chalco averages a high of 24°C and a low of 13°C. It gets 88 mm of precipitation over about 9 rainy days. The sun is out about 17% of daylight hours. The September record high is 29°C (2023) and the record low is 6°C (1979). September is one of the most comfortable months to visit.

Chalco weather in October

In October, Chalco averages a high of 23°C and a low of 12°C. It gets 37 mm of precipitation over about 5 rainy days. The sun is out about 27% of daylight hours. The October record high is 29°C (2021) and the record low is 1°C (1983). October is one of the most comfortable months to visit.

Chalco weather in November

In November, Chalco averages a high of 23°C and a low of 10°C. It gets 7 mm of precipitation over about 2 rainy days. The sun is out about 56% of daylight hours. The November record high is 30°C (2013) and the record low is 1°C (1975). November is one of the most comfortable months to visit.

Chalco weather in December

In December, Chalco averages a high of 23°C and a low of 8°C. It gets 3 mm of precipitation over about 1 rainy days. The sun is out about 59% of daylight hours. The December record high is 28°C (2015) and the record low is 0°C (1996). December is one of the most comfortable months to visit.

Sunshine, humidity and wind in Chalco

February is the sunniest month in Chalco, with sunshine about 80% of daylight hours. July is the cloudiest, at 17%. Over the year the sun shines about 47% of daylight hours. Chalco is cloudier than 72% of Mexico.

Humidity peaks in August at 79% and is lowest in March at 44%.

Chalco has about 7 days a year above 32°C. Chalco is cooler than 96% of Mexico.

Chalco weather records

The hottest temperature on record at the Chalco station is 41°C, on May 12, 2026. The coldest is -2°C, on January 28, 1988.

The wettest day on record brought 163 mm of rain, on June 28, 2012.

22 all-time records have been set at the station since 1973.

The best time to visit Chalco

The most comfortable time to visit is typically January to March, June, and August to December, when daytime highs sit near 24°C.

Winter (December–February) is warm, with average highs around 23°C and lows near 9°C.

Spring (March–May) is warm, with average highs around 27°C and lows near 12°C.

Summer (June–August) is warm, with average highs around 25°C and lows near 13°C. It can feel humid.

Autumn (September–November) is warm, with average highs around 24°C and lows near 12°C.

Chalco climate questions

How much rain does Chalco get?

Chalco gets 468 mm of precipitation in an average year, over about 65 rainy days.

What is the wettest month in Chalco?

July is the wettest month in Chalco, with 108 mm. December is the driest, with 3 mm.

How many rainy days does Chalco have a year?

Chalco has about 65 days with measurable rain in an average year. July has the most, about 14.

What is the hottest month in Chalco?

April is the warmest month in Chalco, with an average high of 28°C.

What is the coldest month in Chalco?

January is the coldest month in Chalco, with an average low of 8°C.

What is the record high temperature in Chalco?

The record high at the Chalco station is 41°C, set on May 12, 2026. The record low is -2°C, on January 28, 1988.

What is the sunniest month in Chalco?

February is the sunniest month in Chalco, with sunshine about 80% of daylight hours. July is the cloudiest.

What is the best time to visit Chalco?

The most comfortable time to visit is typically January to March, June, and August to December, when daytime highs sit near 24°C.