Monthly weather forecast and climate
San Juan, Argentina

Weather in January

January is a tropical summer month in San Juan, Argentina, with average temperature varying between 19.4°C (66.9°F) and 30.6°C (87.1°F). With an average high-temperature of 30.6°C (87.1°F) and an average low-temperature of 19.4°C (66.9°F), January is the warmest month. The average heat index is appraised at a tropical 30.4°C (86.7°F). Weather in January »

Weather in February

The last month of the summer, February, is another warm month in San Juan, Argentina, with average temperature fluctuating between 29.1°C (84.4°F) and 18.6°C (65.5°F). In San Juan, the average high-temperature is almost the same as in January - a moderately hot 29.1°C (84.4°F). Weather in February »

Weather in March

The first month of the autumn, March, is still a warm month in San Juan, Argentina, with average temperature varying between 16°C (60.8°F) and 26.7°C (80.1°F). In March, the average high-temperature is essentially the same as in February - a still warm 26.7°C (80.1°F). Weather in March »

Weather in April

April, the same as March, in San Juan, Argentina, is another pleasant autumn month, with average temperature ranging between max 22.9°C (73.2°F) and min 12.6°C (54.7°F). In April, the average high-temperature slightly decreases, from a moderately hot 26.7°C (80.1°F) in March, to a pleasant 22.9°C (73.2°F). Weather in April »

Weather in May

The last month of the autumn, May, is another comfortable month in San Juan, Argentina, with average temperature varying between 9.2°C (48.6°F) and 19°C (66.2°F). In May, the average high-temperature marginally drops, from an agreeable 22.9°C (73.2°F) in April, to a comfortable 19°C (66.2°F). Weather in May »

Weather in June

The first month of the winter, June, is still a mild month in San Juan, Argentina, with temperature in the range of an average high of 15.9°C (60.6°F) and an average low of 6.2°C (43.2°F). In San Juan, the average high-temperature marginally drops, from a comfortable 19°C (66.2°F) in May, to a mild 15.9°C (60.6°F). Weather in June »

Weather in July

July, the same as June, in San Juan, Argentina, is a moderate winter month, with average temperature varying between 4.5°C (40.1°F) and 14.6°C (58.3°F). The coldest month is July, with an average high-temperature of 14.6°C (58.3°F) and an average low-temperature of 4.5°C (40.1°F). Weather in July »

Weather in August

The last month of the winter, August, is a comfortable month in San Juan, Argentina, with average temperature fluctuating between 7.3°C (45.1°F) and 18.3°C (64.9°F). In San Juan, the average high-temperature marginally rises, from a mild 14.6°C (58.3°F) in July, to an enjoyable 18.3°C (64.9°F). Weather in August »

Weather in September

The first month of the spring, September, is a pleasant month in San Juan, Argentina, with average temperature ranging between min 9°C (48.2°F) and max 20.5°C (68.9°F). In September, the average high-temperature is almost the same as in August - an agreeable 20.5°C (68.9°F). Weather in September »

Weather in October

October in San Juan, Argentina, is a warm spring month, with average temperature fluctuating between 11.7°C (53.1°F) and 23.8°C (74.8°F). In San Juan, Argentina, the average high-temperature marginally rises, from a pleasant 20.5°C (68.9°F) in September, to a moderately hot 23.8°C (74.8°F). Weather in October »

Weather in November

The last month of the spring, November, is also a moderately hot month in San Juan, Argentina, with average temperature ranging between min 14.9°C (58.8°F) and max 27.6°C (81.7°F). In November, the average high-temperature marginally rises, from 23.8°C (74.8°F) in October, to a still moderately hot 27.6°C (81.7°F). Weather in November »

Weather in December

The first month of the summer, December, is also a moderately hot month in San Juan, Argentina, with average temperature fluctuating between 29.8°C (85.6°F) and 17.5°C (63.5°F). In December, the average high-temperature is relatively the same as in November - a still moderately hot 29.8°C (85.6°F). Weather in December »
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FAQ

What is the warmest month in San Juan?

With an average high-temperature of 30.6°C (87.1°F) and an average low-temperature of 19.4°C (66.9°F), January is the warmest month in San Juan.

How many days does it rain in San Juan?

Throughout the year, in San Juan, Argentina, there are 50.2 rainfall days, and 94mm (3.7") of precipitation is accumulated.

What is the wettest month in San Juan?

The month with the most rainfall in San Juan, Argentina, is January when the rain falls for 9.2 days and typically aggregates up to 29mm (1.14") of precipitation.

How much does it snow in San Juan?

In San Juan, during the entire year, snow aggregates up to 8mm (0.31").

When it does not snow in San Juan?

In San Juan, Argentina, snow does not fall in January through June, October through December.

What is the month with the highest UV index in San Juan?

With an average maximum UV index of 7, January is the month with the highest UV index.

What is the month with the least sunshine in San Juan?

Months with the least sunshine in San Juan, Argentina, are March through May and October, with an average of 9.7h of sunshine.

What is the most humid month in San Juan?

April and May, with an average relative humidity of 52%, are most humid months in San Juan.

What are the months with the lowest UV index in San Juan?

Months with the lowest UV index in San Juan are May through July, with an average maximum UV index of 3.

What is the driest month in San Juan?

Months with the least rainfall in San Juan are June and July Rain falls for 1.8 days and accumulates 1mm (0.04") of rain.

What is the month with the shortest days in San Juan?

With an average of 10.1h of daylight, June has the shortest days of the year.

What is the coldest month in San Juan?

July is the coldest month, with an average high-temperature of 14.6°C (58.3°F) and an average low-temperature of 4.5°C (40.1°F).

When does it snow in San Juan?

Months with snowfall are July through September.

When does it snow the most in San Juan?

The month with the most snowfall is July when snow falls for 0.4 days and typically aggregates up to 4mm (0.16") of snow.

What is the month with the most sunshine in San Juan?

August, September and November, with an average of 9.9h of sunshine, are months with the most sunshine in San Juan, Argentina.

What is the least humid month in San Juan?

November is the least humid month, with an average relative humidity of 35%.

When are the longest days in San Juan?

With an average of 14.2h of daylight, December has the longest days of the year in San Juan.

Average temperature
San Juan, Argentina

Average temperature - San Juan, Argentina

The warmest month (with the highest average high temperature) is January (30.6°C).
The month with the lowest average high temperature is July (14.6°C).

The month with the highest average low temperature is January (19.4°C).
The coldest month (with the lowest average low temperature) is July (4.5°C).

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Average pressure
San Juan, Argentina

Average pressure - San Juan, Argentina

The month with the highest atmospheric pressure is July (1018.1mbar).
The month with the lowest atmospheric pressure is December (1010.2mbar).

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Average wind speed
San Juan, Argentina

Average wind speed - San Juan, Argentina

The windiest months (with the highest average wind speed) are October and November (12.2km/h).
The calmest month (with the lowest average wind speed) is May (8.8km/h).

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Average humidity
San Juan, Argentina

Average humidity - San Juan, Argentina

Months with the highest relative humidity are April and May (52%).
The month with the lowest relative humidity is November (35%).

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Average rainfall
San Juan, Argentina

Average rainfall - San Juan, Argentina

The wettest month (with the highest rainfall) is January (29mm).
The driest months (with the least rainfall) are June and July (1mm).

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Average rainfall days
San Juan, Argentina

Average rainfall days - San Juan, Argentina

The month with the highest number of rainy days is January (9.2 days).
The month with the least rainy days is August (1.3 days).

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Average snowfall
San Juan, Argentina

Average snowfall - San Juan, Argentina

The month with the highest snowfall is July (4mm).
Months with the least snowfall are January, February, March, April, May, June, October, November and December (0mm).

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Average snowfall days
San Juan, Argentina

Average snowfall days - San Juan, Argentina

Months with the highest number of snowfall days are July and September (0.4 days).
Months with the least snowfall days are January, February, March, April, May, June, October, November and December (0 days).

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Average daylight / Average sunshine
San Juan, Argentina

Average daylight / Average sunshine - San Juan, Argentina

The month with the longest days is December (Average daylight: 14.2h).
The month with the shortest days is June (Average daylight: 10.1h).

Months with the most sunshine are August, September and November (Average sunshine: 9.9h).
Months with the least sunshine are March, April, May and October (Average sunshine: 9.7).

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Average sunshine days
San Juan, Argentina

Average sunshine days - San Juan, Argentina

The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is January (15.4 days).

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Average visibility
San Juan, Argentina

Average visibility - San Juan, Argentina

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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