- WinterJun–Aug5°18°
- June5°18°
- July4°17°
- August6°20°
- SpringSep–Nov12°26°
- September8°23°
- October12°26°
- November15°28°
- SummerDec–Feb18°31°
- December17°31°
- January18°32°
- February18°31°
- AutumnMar–May12°25°
- March16°29°
- April12°25°
- May9°21°
San Nicolás de los Arroyos, Buenos Aires Weather by Month and Climate Averages
San Nicolás de los Arroyos, Buenos Aires gets 859 mm of precipitation a year over about 57 rainy days. January is the warmest month (average high 32°C) and July the coldest (average low 4°C).
San Nicolás de los Arroyos climate at a glance
Humid subtropical climate
San Nicolás de los Arroyos, Buenos Aires has hot summers and mild winters. Daytime highs range from about 17°C in July to 32°C in January. December is usually the wettest month. The most comfortable time to visit is typically April to October, when daytime highs sit near 21°C.
How much rain does San Nicolás de los Arroyos get?
San Nicolás de los Arroyos 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.
San Nicolás de los Arroyos weather by month
San Nicolás de los Arroyos weather in January
In January, San Nicolás de los Arroyos 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 66% of daylight hours. The January record high is 41°C (2006) and the record low is 4°C (2009).
San Nicolás de los Arroyos weather in February
In February, San Nicolás de los Arroyos 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).
San Nicolás de los Arroyos weather in March
In March, San Nicolás de los Arroyos 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).
San Nicolás de los Arroyos weather in April
In April, San Nicolás de los Arroyos 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 62% 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.
San Nicolás de los Arroyos weather in May
In May, San Nicolás de los Arroyos 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 56% 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.
San Nicolás de los Arroyos weather in June
In June, San Nicolás de los Arroyos 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 48% 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.
San Nicolás de los Arroyos weather in July
In July, San Nicolás de los Arroyos 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 58% 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.
San Nicolás de los Arroyos weather in August
In August, San Nicolás de los Arroyos 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 62% 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.
San Nicolás de los Arroyos weather in September
In September, San Nicolás de los Arroyos 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 58% 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.
San Nicolás de los Arroyos weather in October
In October, San Nicolás de los Arroyos 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.
San Nicolás de los Arroyos weather in November
In November, San Nicolás de los Arroyos 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 65% of daylight hours. The November record high is 39°C (2020) and the record low is 2°C (2022).
San Nicolás de los Arroyos weather in December
In December, San Nicolás de los Arroyos 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 68% of daylight hours. The December record high is 39°C (1995) and the record low is 6°C (1982).
Sunshine, humidity and wind in San Nicolás de los Arroyos
December is the sunniest month in San Nicolás de los Arroyos, with sunshine about 68% of daylight hours. June is the cloudiest, at 48%. Over the year the sun shines about 61% of daylight hours. San Nicolás de los Arroyos is sunnier than 66% of Argentina.
Humidity peaks in June at 75% and is lowest in December at 55%.
San Nicolás de los Arroyos has about 21 days a year above 32°C. San Nicolás de los Arroyos is cooler than 52% of Argentina.
First and last freeze in San Nicolás de los Arroyos
The first fall freeze in San Nicolás de los Arroyos typically comes around June 4, and the last spring freeze around August 28. That leaves a frost-free growing season of about 280 days.
San Nicolás de los Arroyos weather records
The hottest temperature on record at the San Nicolás de los Arroyos 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 San Nicolás de los Arroyos
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.
Monthly climate
| Month | Precip | Rain days | Humidity | Sunshine | Record high | Record low |
|---|---|---|---|---|---|---|
| January | 85 mm | 4 | 57% | 66% | 41° | 4° |
| February | 110 mm | 6 | 62% | 66% | 39° | 5° |
| March | 108 mm | 5 | 68% | 59% | 39° | 3° |
| April | 94 mm | 6 | 72% | 62% | 34° | -1° |
| May | 58 mm | 4 | 73% | 56% | 33° | -6° |
| June | 19 mm | 3 | 75% | 48% | 29° | -8° |
| July | 19 mm | 3 | 71% | 58% | 32° | -8° |
| August | 35 mm | 3 | 64% | 62% | 34° | -8° |
| September | 40 mm | 4 | 62% | 58% | 37° | -4° |
| October | 93 mm | 6 | 58% | 63% | 38° | -1° |
| November | 83 mm | 6 | 56% | 65% | 39° | 2° |
| December | 113 mm | 7 | 55% | 68% | 39° | 6° |
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
San Nicolás de los Arroyos climate questions
How much rain does San Nicolás de los Arroyos get?
San Nicolás de los Arroyos gets 859 mm of precipitation in an average year, over about 57 rainy days.
What is the wettest month in San Nicolás de los Arroyos?
December is the wettest month in San Nicolás de los Arroyos, with 113 mm. June is the driest, with 19 mm.
How many rainy days does San Nicolás de los Arroyos have a year?
San Nicolás de los Arroyos has about 57 days with measurable rain in an average year. December has the most, about 7.
What is the hottest month in San Nicolás de los Arroyos?
January is the warmest month in San Nicolás de los Arroyos, with an average high of 32°C.
What is the coldest month in San Nicolás de los Arroyos?
July is the coldest month in San Nicolás de los Arroyos, with an average low of 4°C.
What is the record high temperature in San Nicolás de los Arroyos?
The record high at the San Nicolás de los Arroyos 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 San Nicolás de los Arroyos?
December is the sunniest month in San Nicolás de los Arroyos, with sunshine about 68% of daylight hours. June is the cloudiest.
When is the first frost in San Nicolás de los Arroyos?
The first fall freeze in San Nicolás de los Arroyos typically comes around June 4. The last spring freeze is around August 28.
What is the best time to visit San Nicolás de los Arroyos?
The most comfortable time to visit is typically April to October, when daytime highs sit near 21°C.
Source: NOAA GHCN-Daily station ROSARIO (72 km away).
GraySky on your iPhone
See the forecast and climate for San Nicolás de los Arroyos, Buenos Aires.
Climate for places near San Nicolás de los Arroyos, Buenos Aires
Normals from NOAA GHCN-Daily station ROSARIO.