As of 17:38 EDT

Port St. Lucie, FL weather in September

89°

Port St. Lucie, Sunday, 9 August, 17:38

Partly cloudy. Feels like 102°. High 91°, low 78°.

Pressure30.03 inHg

Wind7 mph SE

Humidity73%

Visibility6.2 mi

Dew point79°

See detailed hourly forecast

In September, Port St. Lucie, FL averages a high of 85.4° and a low of 75.2°. About 5.8 inches of precipitation fall over the month (21 wet days). The record high is 94.5° (2023) and the record low 63.3° (2022). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	86.7°	76.1°	83%	93° (1998)	72.3° (2024)
2	86.4°	75.7°	70%	91° (1998)	72° (2022)
3	86.4°	75.7°	78%	91.2° (1998)	70° (1999)
4	86.4°	75.7°	80%	90.9° (2010)	70.5° (1967)
5	86.2°	75.9°	83%	91° (2019)	71.8° (2021)
6	86.2°	75.7°	75%	92.7° (2022)	69.4° (2023)
7	86.2°	75.4°	78%	94.5° (2023)	70.3° (2023)
8	86.4°	75.6°	83%	92.7° (2022)	70.5° (1984)
9	85.8°	75.2°	77%	92.8° (2022)	69.3° (1972)
10	86°	75.6°	82%	90.7° (2022)	71.8° (1980)
11	85.5°	75.6°	82%	89.6° (2022)	70.5° (1980)
12	85.3°	75.2°	73%	90.5° (2022)	71.4° (1980)
13	85.5°	75.2°	72%	90.9° (2024)	71.6° (2025)
14	85.5°	75.2°	63%	90.3° (2024)	69.8° (2025)
15	85.8°	75.2°	67%	91.9° (2023)	70.9° (2011)
16	85.6°	75.2°	67%	90.3° (2024)	70.2° (2001)
17	85.3°	75°	62%	90.3° (1990)	70° (2001)
18	85.1°	75°	67%	89.8° (2023)	71.2° (1985)
19	84.9°	75°	63%	88.7° (2018)	71.6° (2022)
20	84.9°	75.2°	65%	89.4° (1987)	71.4° (1976)
21	85.1°	75°	63%	90.9° (1989)	70.2° (1997)
22	84.9°	75°	72%	90.5° (1990)	72° (2024)
23	84.7°	74.7°	60%	91.6° (1990)	69.4° (2023)
24	84.4°	74.5°	75%	88.5° (1988)	69.6° (2019)
25	84.7°	74.7°	68%	89.1° (1988)	67.5° (2019)
26	84.7°	75°	72%	89.6° (2006)	68.5° (2008)
27	84.4°	74.8°	65%	88.5° (2024)	68° (2021)
28	84.6°	74.7°	58%	89.2° (2024)	68.4° (2021)
29	84.2°	74.5°	63%	90.7° (2024)	67.1° (1983)
30	84.2°	74.1°	57%	91.8° (1980)	63.3° (2022)