As of 03:04 EDT

St. Marks, FL weather in September

73°

St. Marks, Wednesday, 7 October, 03:04

Overcast. Feels like 74°. High 85°, low 71°.

Pressure29.91 inHg

Wind8.8 mph NE

Humidity94%

Visibility6.2 mi

Dew point70°

See detailed hourly forecast

In September, St. Marks, FL averages a high of 85.9° and a low of 71.4°. About 4.5 inches of precipitation fall over the month (13 wet days). The record high is 97° (2019) and the record low 50.9° (1967). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	86.9°	73.6°	58%	94.8° (1964)	68° (1992)
2	87.1°	73°	65%	94.5° (2024)	65.8° (2025)
3	87.1°	73°	60%	94.5° (1999)	67.5° (2025)
4	86.9°	73.2°	55%	95.5° (2019)	68.4° (1967)
5	86.5°	72.9°	57%	97° (2019)	66.6° (1994)
6	86.4°	72.7°	63%	95.5° (2025)	66° (1997)
7	86.4°	72.3°	57%	95° (2025)	61.9° (2011)
8	86.4°	72.3°	50%	94.3° (1990)	63.5° (2011)
9	86.5°	72.3°	43%	92.7° (1978)	64° (2011)
10	86.5°	72.1°	47%	91.9° (2005)	62.2° (2017)
11	86.7°	72°	40%	93.2° (2019)	60.6° (2017)
12	86.5°	72.1°	43%	93.6° (1963)	62.2° (2017)
13	86.7°	72°	32%	93.6° (1991)	64.9° (2015)
14	86.7°	71.8°	28%	93.6° (2018)	61.5° (2015)
15	86.9°	71.8°	40%	93.7° (2018)	60.4° (2025)
16	86.4°	72.1°	52%	93.4° (2005)	62.1° (2025)
17	86.2°	72.1°	50%	96.8° (2019)	62.1° (1967)
18	86°	71.2°	43%	95.5° (2005)	60.4° (2000)
19	86.2°	71.1°	33%	94.6° (2005)	55.9° (1981)
20	86.2°	71.1°	38%	95.4° (2005)	56.5° (1981)
21	85.8°	71.2°	40%	95.2° (1997)	59.5° (1981)
22	85.6°	70.7°	33%	93.4° (2022)	57.9° (1983)
23	85.5°	70.2°	28%	92.1° (1961)	56.7° (1983)
24	84.6°	69.3°	30%	93.7° (2019)	57.4° (2021)
25	84.7°	69.4°	33%	93.4° (2019)	59° (1975)
26	83.8°	69.8°	42%	94.5° (2019)	55.9° (1975)
27	83.8°	69.8°	50%	91.6° (1961)	56.1° (2001)
28	84.4°	69.3°	32%	92.1° (1986)	58.8° (1983)
29	83.8°	68.9°	27%	92.3° (2019)	54.5° (1967)
30	82.9°	68°	23%	94.1° (2019)	50.9° (1967)