Johnstown, OH climate
Johnstown has chilly winters and pleasant summers. A typical July afternoon reaches 84°, a January night drops to 20°, and about 26 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Johnstown feels like
Winter
Spring
Summer
Fall
Johnstown 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° | 3.0" | 9.2" | 13 | 15 | 19° – 39° |
| February | 39° | 22° | 2.4" | 6.5" | 11 | 11 | 17° – 40° |
| March | 49° | 30° | 3.5" | 3.7" | 11 | 4 | 33° – 52° |
| April | 63° | 40° | 4.0" | 0.3" | 13 | 0 | 45° – 57° |
| May | 73° | 50° | 4.4" | 0 | 15 | 0 | 54° – 68° |
| June | 81° | 59° | 4.6" | 0 | 12 | 0 | 65° – 72° |
| July | 84° | 62° | 4.5" | 0 | 10 | 0 | 68° – 77° |
| August | 82° | 61° | 3.7" | 0 | 10 | 0 | 67° – 76° |
| September | 76° | 53° | 3.4" | 0 | 10 | 0 | 61° – 69° |
| October | 64° | 42° | 3.0" | 0 | 10 | 0 | 49° – 59° |
| November | 51° | 33° | 3.0" | 1.1" | 10 | 1 | 35° – 47° |
| December | 40° | 25° | 3.1" | 5.0" | 13 | 9 | 21° – 43° |
| Year | 61° | 41° | 42.4" | 25.8" | 136 | 39 |
“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 Johnstown
Johnstown gets 42 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 136 days a year. Snow covers the ground about 39 days of the year.
About 172 frost-free days a year
In half of years the last 32° night comes by April 27 and the first one by October 17. That leaves about 172 frost-free days for gardens, shorter than 58% of U.S. towns.
Heating and cooling a home in Johnstown
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Johnstown, 90% of that work is heating and 10% 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 Johnstown 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 Johnstown averaged 1.0° warmer than the 1900s. The biggest change is in December (+2.5°). The shift is smaller than in 66% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Johnstown’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 Johnstown’s climate
What is the coldest month in Johnstown?
January, with a typical high of 35° and a low of 20°.
What is the hottest month in Johnstown?
July, with a typical high of 84° and a low of 62°. About 9 days a year reach 90°.
How much snow does Johnstown get?
About 26 inches in a normal winter, most of it in January.
When is the first frost in Johnstown?
In half of years the first 32° night comes by October 17, and the last spring frost by April 27.
What is the rainiest month in Johnstown?
June, with 4.6 inches of rain and melted snow. The year totals 42 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Johnstown itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Utica 4 Wsw, OH (10 mi, snow) and Centerburg 2 Se, OH (10 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.