Hanahan weather by month
What a typical year looks like in Hanahan, South Carolina: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Charleston International Airport, 5 km from Hanahan; records cover 1937–2026.
The year at a glance
- Precipitation a year
- 52.5 in1334 mm
- Snow a year
- 0.3 in0.8 cm
- Last spring freeze
- Mar 5
- First fall freeze
- Nov 28
- Heating degree days
- 1,846
- Cooling degree days
- 2,434
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 24°−4° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
Hanahan in January
Highs average 60°16° and lows 39°4°, with 3.4 in86 mm of precipitation and 0.2 in0.5 cm of snow in a typical January.
- Record high
- 83°28° (1950)
- Record low
- 6°−14° (1985)
- Heating degree days
- 483
- Cooling degree days
- 4
Hanahan in February
Highs average 64°18° and lows 42°5°, with 3.1 in77 mm of precipitation and 0.1 in0.3 cm of snow in a typical February.
- Record high
- 87°31° (1989)
- Record low
- 12°−11° (1973)
- Heating degree days
- 352
- Cooling degree days
- 7
Hanahan in March
Highs average 70°21° and lows 47°8°, with 3.4 in85 mm of precipitation in a typical March.
- Record high
- 90°32° (1963)
- Record low
- 15°−9° (1980)
- Heating degree days
- 227
- Cooling degree days
- 31
Hanahan in April
Highs average 77°25° and lows 55°13°, with 3.3 in84 mm of precipitation in a typical April.
- Record high
- 95°35° (2002)
- Record low
- 29°−2° (1944)
- Heating degree days
- 75
- Cooling degree days
- 99
Hanahan in May
Highs average 84°29° and lows 63°17°, with 3.3 in84 mm of precipitation in a typical May.
- Record high
- 101°38° (2019)
- Record low
- 36°2° (1963)
- Heating degree days
- 9
- Cooling degree days
- 266
Hanahan in June
Highs average 89°31° and lows 70°21°, with 6.2 in158 mm of precipitation in a typical June.
- Record high
- 103°39° (1944)
- Record low
- 50°10° (1972)
- Heating degree days
- 0
- Cooling degree days
- 434
Hanahan in July
Highs average 91°33° and lows 74°23°, with 6.6 in168 mm of precipitation in a typical July.
- Record high
- 104°40° (1986)
- Record low
- 58°14° (1952)
- Heating degree days
- 0
- Cooling degree days
- 542
Hanahan in August
Highs average 90°32° and lows 73°23°, with 7 in177 mm of precipitation in a typical August.
- Record high
- 105°41° (1999)
- Record low
- 56°13° (1979)
- Heating degree days
- 0
- Cooling degree days
- 510
Hanahan in September
Highs average 85°30° and lows 68°20°, with 6 in153 mm of precipitation in a typical September.
- Record high
- 99°37° (1944)
- Record low
- 42°6° (1967)
- Heating degree days
- 2
- Cooling degree days
- 357
Hanahan in OctoberThis month
Highs average 78°26° and lows 58°14°, with 4.3 in110 mm of precipitation in a typical October.
- Record high
- 94°34° (1954)
- Record low
- 27°−3° (1952)
- Heating degree days
- 56
- Cooling degree days
- 143
Hanahan in November
Highs average 69°21° and lows 47°8°, with 2.7 in68 mm of precipitation in a typical November.
- Record high
- 88°31° (1961)
- Record low
- 15°−9° (1950)
- Heating degree days
- 234
- Cooling degree days
- 32
Hanahan in December
Highs average 63°17° and lows 42°5°, with 3.4 in85 mm of precipitation in a typical December.
- Record high
- 83°28° (1972)
- Record low
- 8°−13° (1962)
- Heating degree days
- 408
- Cooling degree days
- 9