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San Juan weather in August

Weather in San Juan: August

Average day temperature: 62.8°F
Average night temperature: 50.8°F
Number of sunny days: 27 days
Day length: 10.6 - 11.4 hours
Number of rainy days: 0 days
Precipitation totals: 0.2 in.

Air temperature in August, °F

Show year:
2026
2025
2024

The highest day temperature during August of 2026 was 77°F. At the same time the lowest night temperature was 39°F. Daily and nightly averages during August were 59.1°F and 52.8°F.

Sunny, partly cloudy and cloudy days

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

Precipitation total in August, in.

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

Wind speed in August, mph

The average wind speed value in August is 7.4 mph

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 August is: 9.4.

Best time for vacation in San Juan

Sunniest months:
July 28 days
August 27 days
June 26 days
Warmest months:
January 89.2 °F
December 87.7 °F
February 86.7 °F
Coldest months:
July 58.8 °F
June 59.5 °F
August 62.8 °F
Rainiest months:
October 1 day
March 1 day
August 0 days
Windiest months:
December 10.1 mph
November 9.8 mph
October 9.5 mph

San Juan on a weather map

San Juan
+64°F
NW 5 mph
Feels like: +64°F
Precip.: 1%
24 Hours Forecast
San Juan
Local time: 08:10
October 06, tuesday
0900
64°F
NW
5 mph
1200
72°F
NW
2 mph
1500
81°F
W
5 mph
1800
84°F
W
5 mph
2100
77°F
N
7 mph
October 07, wednesday
0000
70°F
N
8 mph
0300
63°F
N
21 mph
0600
61°F
N
16 mph
Units of measurement: °C / °F