Photo: Nyttend · Public domainGlenwillow has cooler summers than 77% of U.S. towns
Midwinter brings lows of about 20°. By January nights alone, it runs colder than 60% of U.S. towns. December has warmed most since 1901–2000, part of a 1.7° rise. The frost-free window for a garden runs roughly April 8 to November 12.
A year in Glenwillow at a glance
Each month’s typical high and low, and what it brings.
What stands out about Glenwillow’s climate
Compared with towns across the U.S., with Glenwillow’s place in Ohio beside it.
What a year in Glenwillow feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 217 frost-free days a year
In half of years the last 32° night comes by April 8 and the first by November 12. Frost and day counts come from NOAA’s station at Cleveland Burke Airport, 15 miles from the town’s center, 390 ft lower.
The 2023 USDA map puts Glenwillow’s center in zone 6b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −4°. 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 64 inches of snow a winter
Snow, measured at Cleveland, OH, falls mostly in January. Precipitation (rain plus melted snow) adds up to 41 inches a year; June is the wettest month and February the driest. Rain or snow falls on about 159 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Glenwillow
86% 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 Cleveland Burke Airport.
Living with Glenwillow’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
217 frost-free days in zone 6b. The last frost comes by Apr 8 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 12.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October. 0.4 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Glenwillow from natural hazards, river flooding is the largest share (64%); heat waves, cold waves, winter storms and ice storms together are 17%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Glenwillow and its neighbors
Every town next door is within a degree of Glenwillow in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Glenwillow’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 |
|---|---|---|---|---|
| Glenwillow, OH | 20° | 82° | 41" | 64" |
| Clearfield, PA | 18° | 83° | 41" | 63" |
| Michigan City, IN | 19° | 82° | 39" | 65" |
| Niles, MI | 18° | 83° | 40" | 63" |
| Frostburg, MD | 20° | 82° | 44" | 72" |
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 Glenwillow averaged 1.7° warmer than the 1900s. The biggest change is in December (+3.2°).
A bigger shift than in 75% 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 Glenwillow compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Glenwillow’s place among Ohio’s.
Glenwillow weather by month
Highs, lows and precipitation from NOAA’s grid at Glenwillow’s center; snow, wet days and snow on the ground from Cleveland, OH. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 34° | 20° | 2.8" | 18.4" | 18 | 17 | 18° – 37° |
| February | 37° | 21° | 2.2" | 15.1" | 15 | 14 | 14° – 39° |
| March | 46° | 28° | 2.9" | 10.8" | 15 | 7 | 30° – 50° |
| April | 59° | 38° | 3.7" | 2.7" | 15 | 1 | 43° – 55° |
| May | 70° | 49° | 3.9" | 0.0" | 13 | 0 | 52° – 66° |
| June | 79° | 58° | 4.1" | 0.0" | 12 | 0 | 63° – 73° |
| July | 82° | 62° | 4.0" | 0.0" | 11 | 0 | 68° – 76° |
| August | 81° | 61° | 3.6" | 0.0" | 10 | 0 | 66° – 76° |
| September | 74° | 54° | 4.0" | 0.0" | 10 | 0 | 61° – 69° |
| October | 62° | 43° | 3.6" | 0.1" | 12 | 0 | 49° – 59° |
| November | 50° | 34° | 3.3" | 4.5" | 13 | 3 | 35° – 48° |
| December | 39° | 26° | 3.0" | 12.2" | 16 | 10 | 22° – 43° |
| Year | 59° | 41° | 40.9" | 63.8" | 159 | 52 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 14° to 39°. September is the most reliable, staying within 8°.
Where Glenwillow’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 Glenwillow’s center.
- Snow: Cleveland, OH.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Cleveland Burke Airport, 15 miles from the town’s center, 390 ft lower; 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 Glenwillow’s climate
What is the weather like in Glenwillow?
A typical July afternoon reaches 82°, a January night drops to 20°, and about 64 inches of snow falls in a normal winter. Colder January nights than 60% of U.S. towns; cooler July afternoons than 77% of U.S. towns.
How cold does it get in Glenwillow in winter?
January nights average 20°. About 92 nights a year reach 32° or below and 1 reach 0° or below. In the coldest January of the last 30 years the month averaged 18°.
How much snow does Glenwillow get?
About 64 inches in a normal winter at Cleveland, OH, most of it in January, with snow on the ground about 52 days a year.
How hot does it get in Glenwillow?
July, with a typical high of 82° and a low of 62°. About 9 days a year reach 90° (Cleveland Burke Airport).
When is the first and last frost in Glenwillow?
In half of years the last spring frost (32°) comes by April 8 and the first fall frost by November 12, about 217 frost-free days, at Cleveland Burke Airport.
What growing zone is Glenwillow in?
Zone 6b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −4°.
What is the best time of year to visit Glenwillow?
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 Glenwillow getting warmer?
Yes: 1991–2020 averaged 1.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 75% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Glenwillow.
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.