In Puerto Rico, temperatures average 78°-83° F (26°-28° C) year-round. December-April are the coolest months. (Sweaters are necessary in the mountains during winter.) In the hottest months, July through September, temperatures often top 95° F (32° C).
Weather Patterns For San Juan
Note: San Juan is approximately 30 miles Northwest of Fajardo. Temperatures are about the same, but San Juan receives more rain than Fajardo.
| Month | Avg. High |
Avg. Low |
Record High |
Record Low |
|---|---|---|---|---|
| January | 83 °F | 71 °F | 92 °F | 61 °F |
| February | 84 °F | 71 °F | 96 °F | 62 °F |
| March | 84 °F | 72 °F | 96 °F | 60 °F |
| April | 86 °F | 73 °F | 97 °F | 64 °F |
| May | 84 °F | 74 °F | 96 °F | 66 °F |
| June | 85 °F | 75 °F | 97 °F | 69 °F |
| July | 89 °F | 77 °F | 95 °F | 69 °F |
| August | 89 °F | 77 °F | 97 °F | 70 °F |
| September | 89 °F | 76 °F | 97 °F | 69 °F |
| October | 88 °F | 76 °F | 98 °F | 67 °F |
| November | 86 °F | 74 °F | 96 °F | 66 °F |
| December | 84 °F | 72 °F | 94 °F | 63 °F |
