This page presents a long range weather forecast for San Juan in May as well as other months. You can quickly get a brief overview of the weather to expect in May on a daily basis.
The San Juan extended forecast data provided is based on the average values of previous years.
Long range weather forecast
Select a month and click on a day for more information:
Wednesday
May 1
28° / 23°
Thursday
May 2
30° / 24°
Friday
May 3
29° / 24°
Saturday
May 4
28° / 23°
Sunday
May 5
28° / 23°
Monday
May 6
27° / 24°
Tuesday
May 7
27° / 24°
Wednesday
May 8
26° / 24°
Thursday
May 9
25° / 24°
Friday
May 10
27° / 24°
Saturday
May 11
28° / 24°
Sunday
May 12
29° / 24°
Monday
May 13
29° / 25°
Tuesday
May 14
29° / 25°
Wednesday
May 15
29° / 25°
Thursday
May 16
31° / 24°
Friday
May 17
31° / 24°
Saturday
May 18
31° / 24°
Sunday
May 19
31° / 24°
Monday
May 20
31° / 24°
Tuesday
May 21
31° / 24°
Wednesday
May 22
30° / 24°
Thursday
May 23
30° / 24°
Friday
May 24
31° / 24°
Saturday
May 25
30° / 24°
Sunday
May 26
30° / 24°
Monday
May 27
30° / 24°
Tuesday
May 28
30° / 24°
Wednesday
May 29
31° / 24°
Thursday
May 30
30° / 24°
Friday
May 31
31° / 24°
San Juan 30 days weather forecast
Check out our estimated 30 days weather forecast for San Juan, this data is based on the average weather in San Juan in the last few years.
For a more accurate and detailed forecast, check out the 14 day weather for San Juan next to the desired date.