Places › San Juan, PR › December
San Juan in December
A good month — score 70 of 100
Typical December days in San Juan reach about 84°F with nights near 73°F; rain is frequent — about 20 days see some rain, usually in showers.
Avg high
84°F
1991–2020 normal
Avg low
73°F
1991–2020 normal
Rain total
4.85 in
in a typical December
Rain days
20
days with at least 0.01 in
Daylight
11h 02m
at mid-December, computed
What to pack for San Juan in December
- A waterproof shell and shoes you can soak — rain falls on about 20 days in a typical December, so plan an indoor anchor each day.
- Swimsuit, sandals, and reef-safe sunscreen.
Every packing line is triggered by a number on this page — the rules are on How we pick.
December vs. the alternatives
The whole year in San Juan
JAN
83°F
Rain 18 days
Daylight 11h 08mFEB
84°F
Rain 15 days
Daylight 11h 31mMAR
85°F
★ Best
Rain 13 days
Daylight 11h 59mAPR
86°F
★ Best
Rain 14 days
Daylight 12h 32mMAY
87°F
Rain 16 days
Daylight 12h 59mJUN
89°F
Rain 15 days
Daylight 13h 14mJUL
89°F
Rain 19 days
Daylight 13h 08mAUG
89°F
Rain 20 days
Daylight 12h 45mSEP
89°F
Rain 18 days
Daylight 12h 13mOCT
89°F
Rain 18 days
Daylight 11h 41mNOV
86°F
Rain 21 days
Daylight 11h 14mDEC
84°F
Rain 20 days
Daylight 11h 02m
83°F
Rain 18 days
Daylight 11h 08mFEB
84°F
Rain 15 days
Daylight 11h 31mMAR
85°F
★ Best
Rain 13 days
Daylight 11h 59mAPR
86°F
★ Best
Rain 14 days
Daylight 12h 32mMAY
87°F
Rain 16 days
Daylight 12h 59mJUN
89°F
Rain 15 days
Daylight 13h 14mJUL
89°F
Rain 19 days
Daylight 13h 08mAUG
89°F
Rain 20 days
Daylight 12h 45mSEP
89°F
Rain 18 days
Daylight 12h 13mOCT
89°F
Rain 18 days
Daylight 11h 41mNOV
86°F
Rain 21 days
Daylight 11h 14mDEC
84°F
Rain 20 days
Daylight 11h 02m
Averages are the 1991–2020 climate normals (NOAA National Centers for Environmental Information) for the station named on each page. Rain days = days with at least 0.01 in of precipitation. Daylight is computed for the middle of the month.