As of 10:55 EDT

San Castle, FL weather in August

90°

San Castle, Sunday, 9 August, 10:55

Mostly clear. Feels like 103°. High 90°, low 80°.

Pressure30.12 inHg

Wind8 mph SE

Humidity74%

Visibility6.2 mi

Dew point81°

See detailed hourly forecast

In August, San Castle, FL averages a high of 86.7° and a low of 77.3°. About 7.2 inches of precipitation fall over the month (26 wet days). The record high is 97.9° (2025) and the record low 72.7° (1984). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	87.1°	77.5°	87%	94.1° (2025)	74.7° (1971)
2	86.9°	77.4°	80%	95.5° (2025)	74.7° (2017)
3	86.5°	77.4°	90%	93.6° (2025)	74.1° (1971)
4	86.7°	77°	82%	94.8° (2025)	73.9° (1964)
5	86.7°	77.4°	78%	91.4° (2025)	72.9° (1971)
6	87.4°	77.7°	82%	90.7° (2025)	73.4° (1971)
7	87.1°	77.7°	77%	92.5° (2015)	74.3° (1985)
8	86.9°	77.5°	75%	90.9° (2015)	74.3° (2021)
9	86.7°	77.4°	88%	91.6° (1963)	74.7° (1973)
10	86.5°	77°	83%	92.1° (2014)	73.4° (1971)
11	87.1°	77.2°	82%	92.3° (1963)	74.1° (2018)
12	86.9°	77.2°	82%	90.3° (2015)	74.3° (2017)
13	87.1°	77.4°	78%	92.7° (2006)	74.7° (2022)
14	87.3°	77.2°	88%	92.3° (2025)	73.9° (2022)
15	86.9°	77.7°	90%	93.2° (2025)	74.5° (2022)
16	86.7°	77.5°	83%	93° (2025)	74.7° (1976)
17	87.1°	77.7°	83%	93.6° (2025)	74.5° (1976)
18	86.9°	77.5°	80%	93.7° (2025)	74.1° (2024)
19	86.7°	77.4°	90%	93.6° (2025)	74.5° (1976)
20	87.1°	77.4°	87%	97.9° (2025)	74.5° (2021)
21	87.3°	77.5°	87%	95.9° (2025)	73° (1969)
22	86.7°	77.4°	90%	92.1° (1993)	74.1° (2024)
23	86.4°	77.4°	87%	91° (1969)	73° (1996)
24	86.2°	77.4°	83%	90.1° (2014)	74.5° (1996)
25	86°	77.2°	90%	90.5° (2022)	73.4° (2002)
26	86.2°	77.4°	87%	91.6° (1998)	74.1° (1984)
27	86°	77.2°	85%	92.1° (2011)	74.3° (2017)
28	86.2°	77.2°	80%	89.8° (2025)	72.7° (1984)
29	86.2°	77°	80%	91.6° (2025)	72.7° (1994)
30	86°	77°	82%	90.9° (2023)	73° (1969)
31	86.4°	77°	82%	93.7° (2025)	74.1° (1976)