Best Time to Visit
🇵🇷 San Juan, Puerto Rico · North America
Based on 30-year climate data (1991-2020) from Open-Meteo
Jan
28°
22°
Great
Feb
29°
21°
Great
Mar
29°
22°
Great
Apr
30°
22°
Great
May
30°
23°
Good
Jun
31°
24°
Good
Jul
31°
25°
Good
Aug
31°
25°
Good
Sep
31°
25°
Good
Oct
30°
24°
Good
Nov
29°
23°
Good
Dec
28°
22°
Great
| Month | High | Low | Rain Days | Sunshine | Humidity | UV | Rating | Details |
|---|---|---|---|---|---|---|---|---|
| JanuaryRecommended | 28°C | 22°C | 11 | 11h | 78% | 3 | Great | View |
| FebruaryRecommended | 29°C | 21°C | 9 | 11h | 78% | 3 | Great | View |
| MarchRecommended | 29°C | 22°C | 9 | 11h | 78% | 6 | Great | View |
| AprilRecommended | 30°C | 22°C | 12 | 12h | 78% | 6 | Great | View |
| May | 30°C | 23°C | 17 | 12h | 78% | 9 | Good | View |
| June | 31°C | 24°C | 14 | 12h | 78% | 9 | Good | View |
| July | 31°C | 25°C | 17 | 12h | 78% | 9 | Good | View |
| August | 31°C | 25°C | 19 | 12h | 78% | 9 | Good | View |
| September | 31°C | 25°C | 21 | 11h | 78% | 6 | Good | View |
| October | 30°C | 24°C | 21 | 11h | 78% | 6 | Good | View |
| November | 29°C | 23°C | 19 | 10h | 78% | 3 | Good | View |
| DecemberRecommended | 28°C | 22°C | 13 | 11h | 78% | 3 | Great | View |
Data source: Open-Meteo ERA5 reanalysis archive, 30-year historical normals (1991-2020). Temperatures in Celsius. Sunshine hours are daily averages.
Avg: 30°C high, 22°C low
Temperatures peak at 30°C (86°F), making midday heat intense. Rain is frequent, waterproof gear recommended. Nights cool to 22°C (72°F).
Avg: 31°C high, 25°C low
Temperatures peak at 31°C (88°F), making midday heat intense. Rain is frequent, waterproof gear recommended. Nights cool to 25°C (77°F).
Avg: 30°C high, 24°C low
Temperatures peak at 30°C (86°F), making midday heat intense. Rain is frequent, waterproof gear recommended. Nights cool to 24°C (75°F).
Avg: 28°C high, 22°C low
Comfortable warmth at 28°C (82°F), ideal for outdoor activities. Rain is frequent, waterproof gear recommended. Nights cool to 22°C (72°F).
The least favorable time to visit San Juan is May and June. During this period, you can expect heavy rainfall.
May
Challenges: heavy rainfall
June
Challenges: frequent rain
July
Challenges: heavy rainfall
Note: visiting during off-peak months often means lower prices, fewer crowds, and a more authentic experience.
Packing recommendations for visiting San Juan during the best travel months (January, February, March), when temperatures range from 22°C to 29°C:
San Juan has a tropical climate (Koppen classification: Am). The warmest month is September with highs of 31°C, while the coldest month is December at just 28°C. Annual rainfall averages 903mm across approximately 182 rain days.
| Metric | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °C | 28 | 29 | 29 | 30 | 30 | 31 | 31 | 31 | 31 | 30 | 29 | 28 |
| Low °C | 22 | 21 | 22 | 22 | 23 | 24 | 25 | 25 | 25 | 24 | 23 | 22 |
| Rain Days | 11 | 9 | 9 | 12 | 17 | 14 | 17 | 19 | 21 | 21 | 19 | 13 |
| Rain mm | 43 | 31 | 41 | 73 | 108 | 62 | 68 | 82 | 128 | 113 | 105 | 49 |
| Sun h/day | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 10 | 11 |
| Humidity % | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 |
| UV Index | 3 | 3 | 6 | 6 | 9 | 9 | 9 | 9 | 6 | 6 | 3 | 3 |
Considering alternatives to San Juan? Compare the best travel months for nearby cities:
For a complete day-by-day weather breakdown including packing lists, activities, and local events, explore each month individually:
January
February
March
April
May
June
July
August
September
October
November
December
Explore weather guides for other popular destinations: