Castelar, Buenos Aires Weather by Month and Climate Averages

How much rain does Castelar get?

Castelar gets 1290 mm of precipitation in an average year, spread over about 72 days with measurable rain. That is more rainy days than 87% of Argentina.

December is the wettest month, with 162 mm. June is the driest, with 31 mm. January has the most rainy days, about 8.

Castelar weather by month

Castelar weather in January

In January, Castelar averages a high of 30°C and a low of 20°C. It gets 150 mm of precipitation over about 8 rainy days. The sun is out about 64% of daylight hours. The January record high is 42°C (2022) and the record low is 9°C (1988).

Castelar weather in February

In February, Castelar averages a high of 29°C and a low of 19°C. It gets 144 mm of precipitation over about 7 rainy days. The sun is out about 61% of daylight hours. The February record high is 38°C (2025) and the record low is 8°C (2023).

Castelar weather in March

In March, Castelar averages a high of 27°C and a low of 18°C. It gets 94 mm of precipitation over about 6 rainy days. The sun is out about 60% of daylight hours. The March record high is 39°C (2023) and the record low is 6°C (1990).

Castelar weather in April

In April, Castelar averages a high of 23°C and a low of 14°C. It gets 150 mm of precipitation over about 7 rainy days. The sun is out about 60% of daylight hours. The April record high is 34°C (2004) and the record low is 3°C (1971). April is one of the most comfortable months to visit.

Castelar weather in May

In May, Castelar averages a high of 19°C and a low of 11°C. It gets 83 mm of precipitation over about 6 rainy days. The sun is out about 54% of daylight hours. The May record high is 31°C (1972) and the record low is 0°C (1971). May is one of the most comfortable months to visit.

Castelar weather in June

In June, Castelar averages a high of 17°C and a low of 8°C. It gets 31 mm of precipitation over about 4 rainy days. The sun is out about 45% of daylight hours. The June record high is 28°C (2024) and the record low is -2°C (1987).

Castelar weather in July

In July, Castelar averages a high of 16°C and a low of 7°C. It gets 60 mm of precipitation over about 5 rainy days. The sun is out about 54% of daylight hours. The July record high is 30°C (1979) and the record low is -2°C (2025).

Castelar weather in August

In August, Castelar averages a high of 18°C and a low of 9°C. It gets 88 mm of precipitation over about 6 rainy days. The sun is out about 55% of daylight hours. The August record high is 34°C (1996) and the record low is -2°C (1991). August is one of the most comfortable months to visit.

Castelar weather in September

In September, Castelar averages a high of 20°C and a low of 11°C. It gets 76 mm of precipitation over about 5 rainy days. The sun is out about 52% of daylight hours. The September record high is 36°C (2013) and the record low is 1°C (1990). September is one of the most comfortable months to visit.

Castelar weather in October

In October, Castelar averages a high of 23°C and a low of 13°C. It gets 118 mm of precipitation over about 7 rainy days. The sun is out about 59% of daylight hours. The October record high is 36°C (2021) and the record low is 1°C (1972). October is one of the most comfortable months to visit.

Castelar weather in November

In November, Castelar averages a high of 26°C and a low of 16°C. It gets 133 mm of precipitation over about 5 rainy days. The sun is out about 62% of daylight hours. The November record high is 37°C (1985) and the record low is 4°C (1973). November is one of the most comfortable months to visit.

Castelar weather in December

In December, Castelar averages a high of 29°C and a low of 18°C. It gets 162 mm of precipitation over about 7 rainy days. The sun is out about 64% of daylight hours. The December record high is 41°C (1995) and the record low is 6°C (1971).

Sunshine, humidity and wind in Castelar

January is the sunniest month in Castelar, with sunshine about 64% of daylight hours. June is the cloudiest, at 45%. Over the year the sun shines about 58% of daylight hours. Castelar is cloudier than 71% of Argentina.

Humidity peaks in June at 76% and is lowest in December at 58%.

Castelar has about 19 days a year above 32°C. Castelar is cooler than 59% of Argentina.

First and last freeze in Castelar

The first fall freeze in Castelar typically comes around June 30, and the last spring freeze around July 12. That leaves a frost-free growing season of about 353 days.

Castelar weather records

The hottest temperature on record at the Castelar station is 42°C, on January 15, 2022. The coldest is -2°C, on August 1, 1991.

The wettest day on record brought 300 mm of rain, on June 8, 1973.

30 all-time records have been set at the station since 1970.

The annual mean temperature has changed by +0.1°C per decade since 1970.

The best time to visit Castelar

The most comfortable time to visit is typically April to May and August to November, when daytime highs sit near 22°C.

Winter (June–August) is mild, with average highs around 17°C and lows near 8°C.

Spring (September–November) is warm, with average highs around 23°C and lows near 13°C.

Summer (December–February) is hot, with average highs around 29°C and lows near 19°C.

Autumn (March–May) is warm, with average highs around 23°C and lows near 14°C.

Castelar climate questions

How much rain does Castelar get?

Castelar gets 1290 mm of precipitation in an average year, over about 72 rainy days.

What is the wettest month in Castelar?

December is the wettest month in Castelar, with 162 mm. June is the driest, with 31 mm.

How many rainy days does Castelar have a year?

Castelar has about 72 days with measurable rain in an average year. January has the most, about 8.

What is the hottest month in Castelar?

January is the warmest month in Castelar, with an average high of 30°C.

What is the coldest month in Castelar?

July is the coldest month in Castelar, with an average low of 7°C.

What is the record high temperature in Castelar?

The record high at the Castelar station is 42°C, set on January 15, 2022. The record low is -2°C, on August 1, 1991.

What is the sunniest month in Castelar?

January is the sunniest month in Castelar, with sunshine about 64% of daylight hours. June is the cloudiest.

When is the first frost in Castelar?

The first fall freeze in Castelar typically comes around June 30. The last spring freeze is around July 12.

What is the best time to visit Castelar?

The most comfortable time to visit is typically April to May and August to November, when daytime highs sit near 22°C.