San Juan, Puerto Rico 14-Day Forecast
Puerto Rico 🇵🇷
83°
Overcast right now
Today: high 85°, low 80°
Updated just now
San Juan weather for the next 14 days
Wednesday, September 16
Patchy rain nearby High 86° Low 81°Precipitation
58%
· 0.03 in
Max wind
16 mph
Humidity
76%
UV index
10 - Very High
Sunrise / sunset
06:12 AM / 06:26 PM
Thursday, September 17
Patchy rain nearby High 87° Low 81°Precipitation
83%
· 0.29 in
Max wind
15 mph
Humidity
78%
UV index
10 - Very High
Sunrise / sunset
06:12 AM / 06:25 PM
Friday, September 18
Overcast High 85° Low 81°Precipitation
56%
· 0.03 in
Max wind
13 mph
Humidity
77%
UV index
4 - Moderate
Sunrise / sunset
06:12 AM / 06:24 PM
Saturday, September 19
Patchy rain nearby High 86° Low 80°Precipitation
64%
· 0.07 in
Max wind
16 mph
Humidity
75%
UV index
10 - Very High
Sunrise / sunset
06:12 AM / 06:23 PM
Sunday, September 20
Patchy rain nearby High 86° Low 79°Precipitation
83%
· 0.57 in
Max wind
17 mph
Humidity
77%
UV index
7 - High
Sunrise / sunset
06:13 AM / 06:22 PM
Monday, September 21
Patchy rain nearby High 88° Low 80°Precipitation
79%
· 0.22 in
Max wind
16 mph
Humidity
74%
UV index
7 - High
Sunrise / sunset
06:13 AM / 06:21 PM
Tuesday, September 22
Patchy rain nearby High 87° Low 81°Precipitation
68%
· 0.15 in
Max wind
17 mph
Humidity
75%
UV index
8 - Very High
Sunrise / sunset
06:13 AM / 06:20 PM
Wednesday, September 23
Patchy rain nearby High 85° Low 80°Precipitation
70%
· 0.13 in
Max wind
14 mph
Humidity
77%
UV index
7 - High
Sunrise / sunset
06:13 AM / 06:20 PM
Thursday, September 24
Patchy rain nearby High 88° Low 79°Precipitation
71%
· 0.11 in
Max wind
16 mph
Humidity
77%
UV index
7 - High
Sunrise / sunset
06:13 AM / 06:19 PM
Friday, September 25
Patchy rain nearby High 87° Low 79°Precipitation
72%
· 0.18 in
Max wind
17 mph
Humidity
76%
UV index
7 - High
Sunrise / sunset
06:13 AM / 06:18 PM
Saturday, September 26
Patchy rain nearby High 85° Low 80°Precipitation
42%
· 0.03 in
Max wind
14 mph
Humidity
75%
UV index
7 - High
Sunrise / sunset
06:14 AM / 06:17 PM
Sunday, September 27
Patchy rain nearby High 84° Low 78°Precipitation
77%
· 0.36 in
Max wind
12 mph
Humidity
76%
UV index
7 - High
Sunrise / sunset
06:14 AM / 06:16 PM
Monday, September 28
Patchy rain nearby High 85° Low 77°Precipitation
79%
· 0.31 in
Max wind
7 mph
Humidity
78%
UV index
7 - High
Sunrise / sunset
06:14 AM / 06:15 PM
San Juan 14-day outlook: the story
The warmest day of San Juan's 14-day outlook is Monday, September 21 with a high near 88°F (31°C); the coolest night comes Monday, September 28, dipping to 77°F (25°C). Temperatures hold fairly steady from week to week. Highs over the next two weeks average 86°F (30°C), right in line with the typical September high of 88°F (31°C).
Precipitation is most likely on Tuesday 15, Wednesday 16, Thursday 17, Friday 18 and beyond; the wettest day looks like Sunday, September 20 with about 0.57 in (14.5 mm) expected. For the weekend, expect Saturday 86°F (30°C) and patchy rain nearby / Sunday 86°F (30°C) and patchy rain nearby.
For typical conditions month by month, see the San Juan climate & average temperatures guide.
San Juan forecast questions
Will it rain in San Juan this week?
The forecast currently shows meaningful precipitation chances on 13 of the next 14 days, peaking around Sunday, September 20.
What will be the warmest day in San Juan over the next 14 days?
Monday, September 21, with a forecast high near 88°F (31°C).
How accurate is a 14-day forecast for San Juan?
Days 1-3 are highly reliable, days 4-7 capture the overall pattern well, and days 8-14 indicate trends rather than exact figures - check back as the date approaches; this page refreshes throughout the day.
Average temperatures in San Juan by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 83° | 71° | 14 | 2.1 in | 10.8 h/day | 77% |
| February | 83° | 72° | 15 | 2.4 in | 10.8 h/day | 75% |
| March | 84° | 72° | 15 | 2.2 in | 11.1 h/day | 73% |
| April | 85° | 73° | 16 | 3.1 in | 11.7 h/day | 74% |
| May | 87° | 75° | 17 | 3.1 in | 11.9 h/day | 75% |
| June | 89° | 76° | 17 | 2.4 in | 12.2 h/day | 75% |
| July | 88° | 77° | 19 | 3.1 in | 12.0 h/day | 76% |
| August | 88° | 77° | 19 | 3.6 in | 11.5 h/day | 78% |
| September | 88° | 77° | 22 | 6.1 in | 10.8 h/day | 81% |
| October | 87° | 76° | 22 | 4.9 in | 10.3 h/day | 82% |
| November | 85° | 74° | 20 | 5.3 in | 9.7 h/day | 82% |
| December | 83° | 73° | 18 | 2.4 in | 10.6 h/day | 79% |
14-day forecasts nearby