Summer arrives softly in Johnston Township, cooler than in 78% of U.S. towns
Deep winter brings January lows near 18°. June is the wettest month, February the driest. In January, nights here are colder than in 70% of U.S. towns. Keep the boiler serviced for the months from November to April, which average under 50°.
A year in Johnston Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Johnston Township’s climate
Compared with towns across the U.S., with Johnston Township’s place in Ohio beside it.
What a year in Johnston Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 167 frost-free days a year
In half of years the last 32° night comes by May 1 and the first by October 17. Frost and day counts come from NOAA’s station at Youngstown Rgnl Airport, 9 miles from the town’s center, 110 ft higher.
The 2023 USDA map puts Johnston Township’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −7°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 40 inches of snow a winter
Snow, measured at Mosquito Creek Lake, OH, falls mostly in January. Precipitation (rain plus melted snow) adds up to 44 inches a year; June is the wettest month and February the driest. Rain or snow falls on about 156 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Johnston Township
91% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Youngstown Rgnl Airport.
Living with Johnston Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
167 frost-free days in zone 6a. The last frost comes by May 1 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 17.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October. 3.8 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Johnston Township from natural hazards, river flooding is the largest share (65%); heat waves, cold waves, winter storms and ice storms together are 5%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Johnston Township and its neighbors
Every town next door is within a degree of Johnston Township in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Johnston Township’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Johnston Township, OH | 18° | 82° | 44" | 40" |
| State College, PA | 20° | 83° | 43" | 44" |
| Middletown, NY | 18° | 83° | 46" | 43" |
| Belchertown, MA | 16° | 83° | 46" | 43" |
| Griswold, CT | 19° | 83° | 47" | 38" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Johnston Township averaged 1.8° warmer than the 1900s. The biggest change is in December (+3.1°).
A bigger shift than in 77% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Johnston Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Johnston Township’s place among Ohio’s.
Johnston Township weather by month
Highs, lows and precipitation from NOAA’s grid at Johnston Township’s center; snow, wet days and snow on the ground from Mosquito Creek Lake, OH. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 34° | 18° | 3.1" | 12.8" | 16 | 18 | 18° – 36° |
| February | 37° | 19° | 2.4" | 8.8" | 13 | 14 | 12° – 37° |
| March | 46° | 26° | 3.2" | 6.8" | 13 | 7 | 29° – 49° |
| April | 60° | 36° | 3.9" | 1.2" | 14 | 1 | 42° – 54° |
| May | 71° | 46° | 4.0" | 0.0" | 14 | 0 | 51° – 65° |
| June | 79° | 55° | 4.6" | 0.0" | 13 | 0 | 62° – 70° |
| July | 82° | 59° | 4.5" | 0.0" | 12 | 0 | 66° – 75° |
| August | 81° | 58° | 3.8" | 0.0" | 11 | 0 | 65° – 74° |
| September | 75° | 51° | 4.0" | 0.0" | 10 | 0 | 60° – 67° |
| October | 62° | 41° | 3.7" | 0.0" | 13 | 0 | 48° – 58° |
| November | 50° | 32° | 3.2" | 2.6" | 13 | 2 | 34° – 47° |
| December | 39° | 24° | 3.2" | 8.0" | 14 | 11 | 21° – 42° |
| Year | 60° | 39° | 43.5" | 40.2" | 156 | 52 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 12° to 37°. September is the most reliable, staying within 7°.
Where Johnston Township’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Johnston Township’s center.
- Snow: Mosquito Creek Lake, OH.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Youngstown Rgnl Airport, 9 miles from the town’s center, 110 ft higher; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Johnston Township’s climate
What is the weather like in Johnston Township?
A typical July afternoon reaches 82°, a January night drops to 18°, and about 40 inches of snow falls in a normal winter. Colder January nights than 70% of U.S. towns; cooler July afternoons than 78% of U.S. towns.
How cold does it get in Johnston Township in winter?
January nights average 18°. About 127 nights a year reach 32° or below and 4 reach 0° or below. In the coldest January of the last 30 years the month averaged 18°.
How much snow does Johnston Township get?
About 40 inches in a normal winter at Mosquito Creek Lake, OH, most of it in January, with snow on the ground about 52 days a year.
How hot does it get in Johnston Township?
July, with a typical high of 82° and a low of 59°. About 8 days a year reach 90° (Youngstown Rgnl Airport).
When is the first and last frost in Johnston Township?
In half of years the last spring frost (32°) comes by May 1 and the first fall frost by October 17, about 167 frost-free days, at Youngstown Rgnl Airport.
What growing zone is Johnston Township in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −7°.
What is the best time of year to visit Johnston Township?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Johnston Township getting warmer?
Yes: 1991–2020 averaged 1.8° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 77% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Johnston Township.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.