Climate normals · 1970–2000
San Juan Climate
San Juan is a city in Puerto Rico (US) (127) with a population of about 418,140. Its average annual temperature is 26.3°C (79°F), with roughly 1656 mm of rain per year.
26.3°C
Avg Temp
1656
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
San Juan Climate
San Juan has an average annual temperature of 26.3°C (79°F) and receives about 1656 mm of precipitation per year. The warmest month is August and the coldest is January. Figures are 1970–2000 climate normals.
26.3°C
Avg Temp
1656
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 25° / 76° | 106 mm |
| February | 25° / 76° | 71 mm |
| March | 25° / 77° | 79 mm |
| April | 26° / 78° | 107 mm |
| May | 27° / 80° | 180 mm |
| June | 28° / 82° | 132 mm |
| July | 28° / 82° | 158 mm |
| August | 28° / 82° | 183 mm |
| September | 28° / 82° | 151 mm |
| October | 27° / 81° | 153 mm |
| November | 26° / 79° | 183 mm |
| December | 25° / 77° | 153 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit San Juan
The most comfortable months to visit San Juan are typically February, March and January, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 32°C high). The coldest is January (near 20°C low). August is usually the wettest month.
Where to stay near San Juan
Planning a trip to San Juan? Compare hotels and short-term rentals — live availability and prices.
Top-rated places to stay near San Juan
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to San Juan?
Get climate tips and the best lodging deals for San Juan by email. No spam, unsubscribe anytime.
Other cities in Puerto Rico (US)
Frequently Asked Questions
The most comfortable months to visit San Juan are typically February, March and January, when temperatures are mildest and rainfall is relatively low (1970–2000 climate normals).
San Juan, Puerto Rico (US) has an average annual temperature of 26.3°C and about 1656 mm of precipitation per year. The warmest month is August and the coldest is January.
In August, the hottest month, daily highs in San Juan average about 32°C (90°F).
Monthly climate normals (1970–2000) sampled from WorldClim 2.1 at ~9 km resolution. Humidity derived from vapor pressure. City coordinates and population from GeoNames.