Rosario, Santa Fe Weather by Month and Climate Averages

How much rain does Rosario get?

Rosario gets 859 mm of precipitation in an average year, spread over about 57 days with measurable rain. That is more rainy days than 52% of Argentina.

December is the wettest month, with 113 mm. June is the driest, with 19 mm. December has the most rainy days, about 7.

Rosario weather by month

Rosario weather in January

In January, Rosario averages a high of 32°C and a low of 18°C. It gets 85 mm of precipitation over about 4 rainy days. The sun is out about 65% of daylight hours. The January record high is 41°C (2006) and the record low is 4°C (2009).

Rosario weather in February

In February, Rosario averages a high of 31°C and a low of 18°C. It gets 110 mm of precipitation over about 6 rainy days. The sun is out about 66% of daylight hours. The February record high is 39°C (2003) and the record low is 5°C (1976).

Rosario weather in March

In March, Rosario averages a high of 29°C and a low of 16°C. It gets 108 mm of precipitation over about 5 rainy days. The sun is out about 59% of daylight hours. The March record high is 39°C (2023) and the record low is 3°C (1977).

Rosario weather in April

In April, Rosario averages a high of 25°C and a low of 12°C. It gets 94 mm of precipitation over about 6 rainy days. The sun is out about 63% of daylight hours. The April record high is 34°C (2018) and the record low is -1°C (2016). April is one of the most comfortable months to visit.

Rosario weather in May

In May, Rosario averages a high of 21°C and a low of 9°C. It gets 58 mm of precipitation over about 4 rainy days. The sun is out about 57% of daylight hours. The May record high is 33°C (1997) and the record low is -6°C (2008). May is one of the most comfortable months to visit.

Rosario weather in June

In June, Rosario averages a high of 18°C and a low of 5°C. It gets 19 mm of precipitation over about 3 rainy days. The sun is out about 49% of daylight hours. The June record high is 29°C (2005) and the record low is -8°C (2022). June is one of the most comfortable months to visit.

Rosario weather in July

In July, Rosario averages a high of 17°C and a low of 4°C. It gets 19 mm of precipitation over about 3 rainy days. The sun is out about 59% of daylight hours. The July record high is 32°C (2008) and the record low is -8°C (2020). July is one of the most comfortable months to visit.

Rosario weather in August

In August, Rosario averages a high of 20°C and a low of 6°C. It gets 35 mm of precipitation over about 3 rainy days. The sun is out about 64% of daylight hours. The August record high is 34°C (2009) and the record low is -8°C (1995). August is one of the most comfortable months to visit.

Rosario weather in September

In September, Rosario averages a high of 23°C and a low of 8°C. It gets 40 mm of precipitation over about 4 rainy days. The sun is out about 59% of daylight hours. The September record high is 37°C (2013) and the record low is -4°C (1974). September is one of the most comfortable months to visit.

Rosario weather in October

In October, Rosario averages a high of 26°C and a low of 12°C. It gets 93 mm of precipitation over about 6 rainy days. The sun is out about 63% of daylight hours. The October record high is 38°C (2020) and the record low is -1°C (2022). October is one of the most comfortable months to visit.

Rosario weather in November

In November, Rosario averages a high of 28°C and a low of 15°C. It gets 83 mm of precipitation over about 6 rainy days. The sun is out about 64% of daylight hours. The November record high is 39°C (2020) and the record low is 2°C (2022).

Rosario weather in December

In December, Rosario averages a high of 31°C and a low of 17°C. It gets 113 mm of precipitation over about 7 rainy days. The sun is out about 69% of daylight hours. The December record high is 39°C (1995) and the record low is 6°C (1982).

Sunshine, humidity and wind in Rosario

December is the sunniest month in Rosario, with sunshine about 69% of daylight hours. June is the cloudiest, at 49%. Over the year the sun shines about 61% of daylight hours. Rosario is sunnier than 70% of Argentina.

Humidity peaks in June at 74% and is lowest in December at 55%.

Rosario has about 21 days a year above 32°C. Rosario is cooler than 52% of Argentina.

First and last freeze in Rosario

The first fall freeze in Rosario typically comes around June 4, and the last spring freeze around August 28. That leaves a frost-free growing season of about 280 days.

Rosario weather records

The hottest temperature on record at the Rosario station is 41°C, on January 14, 2022. The coldest is -8°C, on July 14, 2020.

The wettest day on record brought 287 mm of rain, on October 29, 1991.

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

The best time to visit Rosario

The most comfortable time to visit is typically April to October, when daytime highs sit near 21°C.

Winter (June–August) is mild, with average highs around 18°C and lows near 5°C.

Spring (September–November) is warm, with average highs around 26°C and lows near 12°C.

Summer (December–February) is hot, with average highs around 31°C and lows near 18°C.

Autumn (March–May) is warm, with average highs around 25°C and lows near 12°C.

Rosario climate questions

How much rain does Rosario get?

Rosario gets 859 mm of precipitation in an average year, over about 57 rainy days.

What is the wettest month in Rosario?

December is the wettest month in Rosario, with 113 mm. June is the driest, with 19 mm.

How many rainy days does Rosario have a year?

Rosario has about 57 days with measurable rain in an average year. December has the most, about 7.

What is the hottest month in Rosario?

January is the warmest month in Rosario, with an average high of 32°C.

What is the coldest month in Rosario?

July is the coldest month in Rosario, with an average low of 4°C.

What is the record high temperature in Rosario?

The record high at the Rosario station is 41°C, set on January 14, 2022. The record low is -8°C, on July 14, 2020.

What is the sunniest month in Rosario?

December is the sunniest month in Rosario, with sunshine about 69% of daylight hours. June is the cloudiest.

When is the first frost in Rosario?

The first fall freeze in Rosario typically comes around June 4. The last spring freeze is around August 28.

What is the best time to visit Rosario?

The most comfortable time to visit is typically April to October, when daytime highs sit near 21°C.