| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 29° | 19.9° | 120.3mm | 15.3 | 62 |
| February | 29.1° | 19.6° | 86.3mm | 11.5 | 69 |
| March | 29.7° | 19.8° | 104.3mm | 10.6 | 68 |
| April | 30.5° | 20.5° | 147.4mm | 11.9 | 62 |
| May | 31.3° | 22.2° | 173.6mm | 12.5 | 58 |
| June | 32.3° | 23° | 106.1mm | 10.4 | 58 |
| July | 32.2° | 23.2° | 193.2mm | 14.6 | 50 |
| August | 32.3° | 23.3° | 211.5mm | 14.8 | 49 |
| September | 32.5° | 23.3° | 234.6mm | 14.3 | 49 |
| October | 31.9° | 22.9° | 209.9mm | 15.5 | 50 |
| November | 30.6° | 22° | 179.2mm | 15.9 | 56 |
| December | 29.3° | 20.6° | 131mm | 16.2 | 61 |
January in Caguas averages a daily high of 29°C with nights around 19.9°C. Expect roughly 15.3 wet days totalling 120.3mm. Generally workable, with some weather to plan around.
February in Caguas averages a daily high of 29.1°C with nights around 19.6°C. Expect roughly 11.5 wet days totalling 86.3mm. Generally workable, with some weather to plan around.
March in Caguas averages a daily high of 29.7°C with nights around 19.8°C. Expect roughly 10.6 wet days totalling 104.3mm. Generally workable, with some weather to plan around.
April in Caguas averages a daily high of 30.5°C with nights around 20.5°C. Expect roughly 11.9 wet days totalling 147.4mm. Generally workable, with some weather to plan around.
May in Caguas averages a daily high of 31.3°C with nights around 22.2°C. Expect roughly 12.5 wet days totalling 173.6mm. Generally workable, with some weather to plan around.
June in Caguas averages a daily high of 32.3°C with nights around 23°C. Expect roughly 10.4 wet days totalling 106.1mm. Generally workable, with some weather to plan around.
July in Caguas averages a daily high of 32.2°C with nights around 23.2°C. Expect roughly 14.6 wet days totalling 193.2mm. Demanding conditions — pack for it and plan indoor options.
August in Caguas averages a daily high of 32.3°C with nights around 23.3°C. Expect roughly 14.8 wet days totalling 211.5mm. Demanding conditions — pack for it and plan indoor options.
September in Caguas averages a daily high of 32.5°C with nights around 23.3°C. Expect roughly 14.3 wet days totalling 234.6mm. Demanding conditions — pack for it and plan indoor options.
October in Caguas averages a daily high of 31.9°C with nights around 22.9°C. Expect roughly 15.5 wet days totalling 209.9mm. Demanding conditions — pack for it and plan indoor options.
November in Caguas averages a daily high of 30.6°C with nights around 22°C. Expect roughly 15.9 wet days totalling 179.2mm. Generally workable, with some weather to plan around.
December in Caguas averages a daily high of 29.3°C with nights around 20.6°C. Expect roughly 16.2 wet days totalling 131mm. Generally workable, with some weather to plan around.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Caguas peaks at 69.
Based on 30 years of records, December–April scores highest for comfort in Caguas, balancing daytime temperature against rainfall.
September is the warmest, averaging a daily high of 32.5°C.
September is the wettest, averaging 234.6mm of rain across roughly 14.3 wet days.
January is the coolest month, with average daily highs around 29°C.