West Portsmouth weather by month
What a typical year looks like in West Portsmouth, Ohio: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at PORTSMOUTH-SCIOTOVILLE, 13 km from West Portsmouth; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 43.1 in1094 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 15
- First fall freeze
- Oct 23
- Heating degree days
- 4,788
- Cooling degree days
- 1,140
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 5°−15° (heating, 99%) and 94°35° (cooling, 1%).
Month by month
West Portsmouth in January
Highs average 41°5° and lows 23°−5°, with 3.1 in78 mm of precipitation in a typical January.
- Record high
- 79°26° (1950)
- Record low
- −29°−34° (1994)
- Heating degree days
- 1020
- Cooling degree days
- 0
West Portsmouth in February
Highs average 45°7° and lows 25°−4°, with 3 in76 mm of precipitation in a typical February.
- Record high
- 79°26° (1945)
- Record low
- −18°−28° (1899)
- Heating degree days
- 837
- Cooling degree days
- 0
West Portsmouth in March
Highs average 55°13° and lows 33°0°, with 4.1 in105 mm of precipitation in a typical March.
- Record high
- 96°36° (1907)
- Record low
- 0°−18° (1980)
- Heating degree days
- 659
- Cooling degree days
- 1
West Portsmouth in April
Highs average 67°20° and lows 42°6°, with 4 in100 mm of precipitation in a typical April.
- Record high
- 97°36° (1894)
- Record low
- 14°−10° (1923)
- Heating degree days
- 322
- Cooling degree days
- 13
West Portsmouth in May
Highs average 76°24° and lows 52°11°, with 4.6 in117 mm of precipitation in a typical May.
- Record high
- 99°37° (1914)
- Record low
- 28°−2° (1986)
- Heating degree days
- 114
- Cooling degree days
- 86
West Portsmouth in June
Highs average 83°29° and lows 61°16°, with 4.1 in105 mm of precipitation in a typical June.
- Record high
- 103°39° (1934)
- Record low
- 38°3° (1988)
- Heating degree days
- 11
- Cooling degree days
- 232
West Portsmouth in July
Highs average 87°30° and lows 65°19°, with 4.4 in112 mm of precipitation in a typical July.
- Record high
- 107°42° (1930)
- Record low
- 40°4° (1988)
- Heating degree days
- 0
- Cooling degree days
- 343
West Portsmouth in August
Highs average 86°30° and lows 63°17°, with 3.3 in83 mm of precipitation in a typical August.
- Record high
- 105°41° (1918)
- Record low
- 35°2° (1986)
- Heating degree days
- 2
- Cooling degree days
- 302
West Portsmouth in September
Highs average 80°27° and lows 56°13°, with 3.3 in84 mm of precipitation in a typical September.
- Record high
- 103°39° (1954)
- Record low
- 28°−2° (1913)
- Heating degree days
- 47
- Cooling degree days
- 143
West Portsmouth in OctoberThis month
Highs average 69°21° and lows 44°6°, with 3 in75 mm of precipitation in a typical October.
- Record high
- 94°34° (1919)
- Record low
- 18°−8° (1895)
- Heating degree days
- 292
- Cooling degree days
- 20
West Portsmouth in November
Highs average 56°13° and lows 33°1°, with 2.8 in70 mm of precipitation in a typical November.
- Record high
- 85°29° (1935)
- Record low
- 2°−17° (1929)
- Heating degree days
- 605
- Cooling degree days
- 0
West Portsmouth in December
Highs average 46°8° and lows 28°−2°, with 3.5 in89 mm of precipitation in a typical December.
- Record high
- 76°24° (1971)
- Record low
- −18°−28° (1989)
- Heating degree days
- 879
- Cooling degree days
- 0