Temperature
Warm by day, warm at night.
82°Ftypical December high
Typical range
December climate
December in San Juan
Puerto Rico · Caribbean
Warm days and plenty of sun. Humid air is the main drawback.
Good overall
Daytime high
82°F
Lows around 75°F
Rain
Several rainy days
Sun
10.5 h/day
Air feel
Humid
Sea temp
82°F
Great for swimming
When to visit
Month-by-month fit
Best
Precipitation
Several rainy days. About 13 wet days this month.
42%wet-day frequency
AmountWet-day chance
Sunshine
Plenty of sun this month.
10.6 hDecember sunshine
Heat & humidity by month
Warm days, with humid periods.
95%December Heat feel
Easy airWarm airHumid airVery humid air
Hourly temperature pattern
In December, afternoons feel about 84° and nights feel near 80°.
WarmHotNight hours
Clear sky
Partly cloudy skies this month.
59%December Clear sky
Clear skyCloud
Wind pattern
Calm winds are typical in December.
9 mphDecember Light breeze
Sea temperature
82°FDecember sea temp
More detailIncludes daypart comfort
Typical December day
December late afternoons are around 81°F, easing to about 78°F in early evening.
Avg temp Typical range
Morning79°F
Feels 82°F
Rain26%
Cloud39%
Humid airVery high
Sun intensityModerate
Midday82°F
Feels 84°F
Rain35%
Cloud45%
Humid airVery high
Sun intensityStrong
Late afternoon81°F
Feels 83°F
Rain30%
Cloud44%
Humid airVery high
Sun intensityModerate
Early evening78°F
Feels 82°F
Rain17%
Cloud38%
Humid airVery high
Sun intensityMinimal
Best windowData tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 82 | 73 | 1.5 | 10 | 10.9 | 79 | 80 |
| Feb | 82 | 73 | 1.2 | 9 | 11.0 | 77 | 80 |
| Mar | 83 | 73 | 1.6 | 9 | 11.2 | 76 | 80 |
| Apr | 84 | 75 | 3.0 | 12 | 11.9 | 78 | 80 |
| May | 85 | 76 | 4.0 | 15 | 11.8 | 80 | 82 |
| Jun | 87 | 78 | 2.4 | 13 | 12.3 | 79 | 83 |
| Jul | 87 | 79 | 2.7 | 16 | 12.3 | 79 | 83 |
| Aug | 87 | 79 | 3.4 | 19 | 11.7 | 81 | 84 |
| Sep | 87 | 79 | 5.2 | 21 | 10.7 | 82 | 85 |
| Oct | 86 | 78 | 4.8 | 20 | 10.5 | 83 | 85 |
| Nov | 84 | 76 | 4.2 | 18 | 10.2 | 83 | 83 |
| Dec | 82 | 75 | 1.9 | 13 | 10.6 | 81 | 82 |
Similar climates
Similar
Similar travel styleHavanaCubaSimilar travel styleChennaiIndiaSimilar travel styleDar es SalaamTanzaniaSimilar travel styleKaohsiungTaiwan
Want a side-by-side climate view? Compare San Juan with Havana.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology