Helvetia weather by month
What a typical year looks like in Helvetia, West Virginia: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Rock Cave 2 NE, 19 km from Helvetia; records cover 1993–2026.
The year at a glance
- Precipitation a year
- 56.4 in1433 mm
- Snow a year
- 55 in141 cm
- Last spring freeze
- Apr 29
- First fall freeze
- Oct 18
- Heating degree days
- 5,400
- Cooling degree days
- 604
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 0°−18° (heating, 99%) and 88°31° (cooling, 1%).
Month by month
Helvetia in January
Highs average 39°4° and lows 22°−6°, with 4.5 in115 mm of precipitation and 17 in43 cm of snow in a typical January.
- Record high
- 71°22° (1995)
- Record low
- −23°−31° (1994)
- Heating degree days
- 1069
- Cooling degree days
- 0
Helvetia in February
Highs average 42°6° and lows 25°−4°, with 4.1 in103 mm of precipitation and 11 in29 cm of snow in a typical February.
- Record high
- 79°26° (2017)
- Record low
- −17°−27° (1996)
- Heating degree days
- 886
- Cooling degree days
- 0
Helvetia in March
Highs average 51°11° and lows 31°0°, with 4.9 in123 mm of precipitation and 10 in26 cm of snow in a typical March.
- Record high
- 84°29° (2020)
- Record low
- −5°−21° (1993)
- Heating degree days
- 742
- Cooling degree days
- 1
Helvetia in April
Highs average 63°17° and lows 41°5°, with 4.8 in121 mm of precipitation and 2 in5.1 cm of snow in a typical April.
- Record high
- 89°32° (2009)
- Record low
- 10°−12° (2021)
- Heating degree days
- 401
- Cooling degree days
- 14
Helvetia in May
Highs average 70°21° and lows 50°10°, with 5.8 in146 mm of precipitation in a typical May.
- Record high
- 91°33° (1996)
- Record low
- 27°−3° (1996)
- Heating degree days
- 190
- Cooling degree days
- 44
Helvetia in June
Highs average 77°25° and lows 59°15°, with 5.1 in131 mm of precipitation in a typical June.
- Record high
- 93°34° (1994)
- Record low
- 36°2° (2003)
- Heating degree days
- 42
- Cooling degree days
- 118
Helvetia in July
Highs average 80°27° and lows 62°17°, with 6.1 in154 mm of precipitation in a typical July.
- Record high
- 94°34° (1993)
- Record low
- 43°6° (1996)
- Heating degree days
- 8
- Cooling degree days
- 195
Helvetia in August
Highs average 78°26° and lows 61°16°, with 5.1 in128 mm of precipitation in a typical August.
- Record high
- 95°35° (1993)
- Record low
- 41°5° (2004)
- Heating degree days
- 15
- Cooling degree days
- 156
Helvetia in September
Highs average 74°23° and lows 54°12°, with 3.7 in93 mm of precipitation in a typical September.
- Record high
- 95°35° (1993)
- Record low
- 35°2° (1999)
- Heating degree days
- 103
- Cooling degree days
- 65
Helvetia in OctoberThis month
Highs average 63°17° and lows 43°6°, with 4.1 in104 mm of precipitation and 0.5 in1.3 cm of snow in a typical October.
- Record high
- 87°31° (2019)
- Record low
- 19°−7° (1997)
- Heating degree days
- 382
- Cooling degree days
- 10
Helvetia in November
Highs average 53°11° and lows 34°1°, with 3.8 in95 mm of precipitation and 2.6 in6.6 cm of snow in a typical November.
- Record high
- 81°27° (2003)
- Record low
- 8°−13° (1996)
- Heating degree days
- 650
- Cooling degree days
- 1
Helvetia in December
Highs average 44°6° and lows 28°−2°, with 4.7 in119 mm of precipitation and 12 in30 cm of snow in a typical December.
- Record high
- 75°24° (2001)
- Record low
- −9°−23° (1993)
- Heating degree days
- 912
- Cooling degree days
- 0