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San Juan weather in January

Weather in San Juan: January

Average day temperature: 89.4°F
Average night temperature: 75.8°F
Number of sunny days: 20 days
Day length: 13.6 - 14.2 hours
Number of rainy days: 0 days
Precipitation totals: 0.2 in.

Air temperature in January, °F

Show year:
2025
2024
2023

The highest day temperature during January of 2025 was 99°F. At the same time the lowest night temperature was 66°F. Daily and nightly averages during January were 90.2°F and 76.4°F.

Sunny, partly cloudy and cloudy days

Mostly all days in January are sunny but cloudy days are also possible.

Precipitation total in January, in.

Precipitation total value in San Juan in January is 0.2 in. Other months of the year show relatively similar values.

Wind speed in January, mph

The average wind speed value in January is 9.1 mph It makes January one of the most windy months of the year.

Average sunny hours

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in January is: 10.4.

Best time for vacation in San Juan

Sunniest months:
July 28 days
August 27 days
September 27 days
Warmest months:
January 89.4 °F
December 87.9 °F
February 87.1 °F
Coldest months:
July 58.8 °F
June 59.6 °F
August 63.4 °F
Rainiest months:
October 1 day
March 1 day
August 0 days
Windiest months:
December 10.0 mph
November 9.8 mph
October 9.5 mph

San Juan on a weather map

San Juan
+79°F
S 3 mph
Feels like: +79°F
Precip.: 0%
Places in Argentina:
Name
°F
+66°F
+73°F
+72°F
+66°F
+61°F
+73°F
+59°F
+59°F
+41°F
+61°F
+79°F
+32°F
+39°F
24 Hours Forecast
San Juan
Local time: 05:01
December 05, friday
0600
79°F
S
3 mph
0900
86°F
N
2 mph
1200
91°F
N
20 mph
1500
95°F
N
18 mph
1800
93°F
N
21 mph
2100
73°F
NW
16 mph
December 06, saturday
0000
70°F
NE
9 mph
0300
72°F
E
6 mph
Units of measurement: °C / °F