South Vienna, OH climate
South Vienna has chilly winters and pleasant summers. A typical July afternoon reaches 83°, a January night drops to 20°, and about 19 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in South Vienna feels like
Winter
Spring
Summer
Fall
South Vienna weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 35° | 20° | 3.1" | 6.2" | 13 | 13 | 17° – 38° |
| February | 39° | 22° | 2.4" | 5.3" | 11 | 9 | 17° – 40° |
| March | 49° | 31° | 3.5" | 3.0" | 12 | 2 | 33° – 52° |
| April | 62° | 40° | 4.2" | 0.1" | 13 | 0 | 45° – 57° |
| May | 72° | 50° | 4.7" | 0 | 14 | 0 | 54° – 68° |
| June | 80° | 59° | 4.6" | 0 | 12 | 0 | 65° – 72° |
| July | 83° | 62° | 4.6" | 0 | 10 | 0 | 68° – 77° |
| August | 82° | 61° | 3.3" | 0 | 9 | 0 | 67° – 76° |
| September | 76° | 53° | 3.2" | 0 | 9 | 0 | 61° – 70° |
| October | 64° | 43° | 2.8" | 0 | 10 | 0 | 49° – 60° |
| November | 51° | 33° | 3.0" | 0.4" | 10 | 0 | 35° – 48° |
| December | 39° | 25° | 3.1" | 3.7" | 12 | 7 | 20° – 42° |
| Year | 61° | 42° | 42.4" | 18.7" | 132 | 31 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in South Vienna
South Vienna gets 42 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 132 days a year. Snow covers the ground about 31 days of the year.
About 175 frost-free days a year
In half of years the last 32° night comes by April 24 and the first one by October 18. That leaves about 175 frost-free days for gardens, shorter than 54% of U.S. towns.
Heating and cooling a home in South Vienna
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In South Vienna, 89% of that work is heating and 11% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How South Vienna compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in South Vienna averaged 1.1° warmer than the 1900s. The biggest change is in December (+2.3°). The shift is smaller than in 66% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at South Vienna’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 17° to 40°. June is the most reliable, staying within 7°.
Common questions about South Vienna’s climate
What is the coldest month in South Vienna?
January, with a typical high of 35° and a low of 20°.
What is the hottest month in South Vienna?
July, with a typical high of 83° and a low of 62°. About 13 days a year reach 90°.
How much snow does South Vienna get?
About 19 inches in a normal winter, most of it in January.
When is the first frost in South Vienna?
In half of years the first 32° night comes by October 18, and the last spring frost by April 24.
What is the rainiest month in South Vienna?
May, with 4.7 inches of rain and melted snow. The year totals 42 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for South Vienna itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at New Carlisle, OH (22 mi, snow) and London Fish Hatchery, OH (6 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.