As of 00:42 AST

Guaynabo, PR weather in December

82°

Guaynabo, Sunday, 9 August, 00:42

Clear. Feels like 89°. High 90°, low 77°.

Pressure30.03 inHg

Wind4 mph SE

Humidity81%

Visibility6.2 mi

Dew point76°

See detailed hourly forecast

In December, Guaynabo, PR averages a high of 82.1° and a low of 70.8°. About 2.0 inches of precipitation fall over the month (13 wet days). The record high is 90.3° (2023) and the record low 63.3° (1991). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	82.8°	71.4°	50%	87.8° (2021)	67.1° (1969)
2	82.8°	71.6°	43%	89.8° (2024)	67.3° (2020)
3	82.6°	71.6°	48%	89.1° (2024)	68° (1996)
4	82.4°	71.4°	52%	88.9° (2023)	67.8° (1996)
5	82.4°	71.4°	53%	88.9° (2024)	67.6° (1973)
6	82.4°	71.6°	45%	90.3° (2023)	67.1° (2020)
7	82.2°	71.2°	45%	87.8° (2025)	67.1° (1960)
8	82.2°	71.1°	40%	87.6° (1997)	68° (1973)
9	82.2°	71.2°	42%	87.6° (2023)	66.4° (2020)
10	82°	71.1°	48%	86.5° (1989)	66.2° (2022)
11	82.4°	71.2°	40%	90° (2025)	66.9° (1966)
12	82.6°	71.1°	43%	88.9° (2025)	65.8° (2018)
13	82°	71.1°	50%	87.4° (2025)	66.7° (1969)
14	82.4°	70.9°	52%	89.1° (2025)	64.2° (2022)
15	81.7°	70.9°	47%	88.3° (1997)	67.3° (1966)
16	81.7°	70.7°	45%	87.1° (1997)	67.3° (1966)
17	82.2°	70.7°	43%	87.1° (2020)	65.7° (1996)
18	82°	70.3°	30%	87.1° (1962)	65.7° (1984)
19	82.2°	70.3°	30%	87.6° (2025)	65.1° (2018)
20	82°	70.5°	53%	87.1° (2009)	67.5° (1977)
21	82°	70.7°	42%	86.9° (2009)	67.5° (1966)
22	82°	70.3°	38%	87.4° (2022)	66° (2018)
23	82°	70.3°	32%	87.8° (2019)	66° (1991)
24	82°	70.3°	45%	88.7° (2019)	63.3° (1991)
25	81.9°	70.2°	40%	88.3° (2019)	66.2° (1964)
26	82°	70.2°	45%	86° (1997)	66.7° (1964)
27	82.2°	70°	38%	87.6° (1976)	66.2° (1976)
28	81.5°	70.3°	37%	87.6° (1997)	66.4° (2020)
29	81.7°	70°	35%	86.9° (1997)	65.5° (2025)
30	81.5°	70°	37%	87.4° (2025)	65.3° (1974)
31	81.7°	70.2°	45%	88° (2025)	65.7° (1962)