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San Juan climate guide
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Temperature in San Juan (°C)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max temperature (daytime) |  27 |
27 |
 28 |
29 |
29 |
 30 |
30 |
30 |
30 |
30 |
29 |
28 |
| Min temperature (night-time) |  20 |
20 |
21 |
21 |
 22 |
23 |
23 |
 24 |
23 |
23 |
22 |
21 |
| Sea temperature |  26 |
26 |
26 |
26 |
27 |
 28 |
28 |
28 |
29 |
29 |
28 |
27 |
Sunshine & Daylight in San Juan
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daily hours of sunshine | ||||||||||||
| Daily hours of daylight |  11 |
 12 |
12 |
 13 |
13 |
13 |
13 |
13 |
12 |
12 |
11 |
11 |
Rainfall in San Juan
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of days with some rain |  20 |
 15 |
15 |
14 |
 16 |
17 |
19 |
20 |
18 |
18 |
19 |
21 |
| Average monthly rainfall (mm) |  116 |
 82 |
 79 |
 121 |
 182 |
 151 |
 180 |
195 |
188 |
171 |
178 |
151 |
More climate for San Juan
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (Maximum) |  8 |
10 |
 11 |
11 |
11 |
11 |
11 |
11 |
11 |
10 |
9 |
8 |
| Heat & Humidity |  M |
M |
M |
 H |
H |
H |
H |
H |
H |
H |
H |
M |
Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme
What's the climate like in San Juan?
San Juan has a hot tropical climate with no dry season.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
The climate guide for San Juan, Puerto Rico shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
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Metric (°C / mm) | Imperial (°F / inches)
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Where's hot in Puerto Rico?
Below are average maximum temperatures at popular destinations in Puerto Rico for next month - October. Select a destination to see the climate guide for all months of the year.
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