San Juan
Argentina
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
San Juan, Argentina

January in San Juan, Argentina, is a hot summer month, with temperature in the range of an average high of 30.6°C (87.1°F) and an average low of 19.4°C (66.9°F).

Temperature

The warmest month is January, with an average high-temperature of 30.6°C (87.1°F) and an average low-temperature of 19.4°C (66.9°F).

Heat index

In January, the average heat index is estimated at a tropical 30.4°C (86.7°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like activity, pregnancy, clothing, and differences in body mass, height, and shape affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In January, the average relative humidity is 40%.

Rainfall

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

Snowfall

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

Daylight

The average length of the day in January is 13.9h.

Sunshine

In San Juan, Argentina, the average sunshine is 9.8h.

UV index

With an average maximum UV index of 7, January is the month with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

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.

What is the temperature in January in San Juan?

In January, the average high-temperature is 30.6°C (87.1°F), and the average low-temperature is 19.4°C (66.9°F). The average heat index (a.k.a. 'apparent temperature', 'real feel'), that takes the relative humidity and factores it into the air temperature reading, in January is estimated at 30.4°C (86.7°F).

What is the average humidity in January in San Juan?

In San Juan, Argentina, the average relative humidity in January is 40%.

How much does it rain in San Juan in January?

In San Juan, during January, the rain falls for 9.2 days and regularly aggregates up to 29mm (1.14") of precipitation.

What is the wettest month in San Juan?

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

When it does not snow in San Juan?

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

How many hours of daylight does San Juan have in January?

In San Juan, Argentina, the average length of the day in January is 13.9h.

How many hours of sunshine does San Juan have in January?

In January, the average sunshine in San Juan is 9.8h.

When is the highest UV index in San Juan?

January is the month with the highest UV index in San Juan, Argentina, with an average maximum UV index of 7.

What is the UV index intensity in January in San Juan?

In January, the average daily maximum UV index in San Juan is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to the UV radiation.
Average temperature in January - San Juan, Argentina
  • Average high temperature in January: 30.6°C

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).

  • Average low temperature in January: 19.4°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).

Average humidity in January - San Juan, Argentina
  • Average humidity in January: 40%

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

Average rainfall in January - San Juan, Argentina
  • Average rainfall in January: 29mm

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

Average rainfall days in January - San Juan, Argentina
  • Average rainfall days in January: 9.2 days

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

Average snowfall in January - San Juan, Argentina
  • Average snowfall in January: 0mm

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

Average snowfall days in January - San Juan, Argentina
  • Average snowfall days in January: 0 days

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

Average daylight in January / Average sunshine in January - San Juan, Argentina
  • Average daylight in January: 13.9h

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

  • Average sunshine in January: 9.8h

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

Average UV index in January - San Juan, Argentina
  • Average UV index in January: 7

The month with the highest UV index is January (UV index 7).
Months with the lowest UV index are May, June and July (UV index 3).