Photo: Nyttend · Public domainCustar is drier than 74% of U.S. towns: 36 inches of precipitation a year
In July the day’s top temperature is typically 85°. Only 65° separates winter nights from summer afternoons. Its January nights bite harder than in 63% of U.S. towns. Warm coats and heating bills mark the months from November to March, when means dip under 50°.
A year in Custar at a glance
Each month’s typical high and low, and what it brings.
What stands out about Custar’s climate
Compared with towns across the U.S., with Custar’s place in Ohio beside it.
What a year in Custar feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 179 frost-free days a year
In half of years the last 32° night comes by April 24 and the first by October 21. Frost and day counts come from NOAA’s station at Hoytville 2 Ne, OH, 6 miles from the town’s center, at about the same height.
The 2023 USDA map puts Custar’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −6°. 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 23 inches of snow a winter
Snow, measured at Hoytville 2 Ne, OH, falls mostly in January. Precipitation (rain plus melted snow) adds up to 36 inches a year; May is the wettest month and February the driest. Rain or snow falls on about 133 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Custar
87% 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 Hoytville 2 Ne, OH.
Living with Custar’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
179 frost-free days in zone 6a. The last frost comes by Apr 24 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 21.
Months with highs of 62–84° and lows of 40° or more: May, June, August, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Custar from natural hazards, river flooding is the largest share (65%); heat waves, cold waves, winter storms and ice storms together are 8%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Custar and similar climates
TownRatings has no climate map of the towns around Custar yet.
Climates most like Custar’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 |
|---|---|---|---|---|
| Custar, OH | 19° | 85° | 36" | 23" |
| Coal City, IL | 16° | 85° | 38" | 25" |
| Ambridge, PA | 21° | 85° | 39" | 20" |
| Munster, IN | 17° | 84° | 39" | 27" |
| Burlington, IA | 16° | 86° | 38" | 22" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Custar averaged 1.4° warmer than the 1900s. The biggest change is in December (+2.7°).
A bigger shift than in 53% 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 Custar compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Custar’s place among Ohio’s.
Custar weather by month
Highs, lows and precipitation from NOAA’s grid at Custar’s center; snow, wet days and snow on the ground from Hoytville 2 Ne, OH. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 33° | 19° | 2.3" | 7.8" | 12 | 11 | 17° – 37° |
| February | 37° | 22° | 2.1" | 4.5" | 10 | 8 | 15° – 40° |
| March | 47° | 30° | 2.4" | 3.8" | 12 | 4 | 31° – 52° |
| April | 61° | 39° | 3.5" | 0.9" | 13 | 0 | 44° – 56° |
| May | 72° | 50° | 4.0" | 0.0" | 13 | 0 | 54° – 67° |
| June | 81° | 60° | 3.8" | 0.0" | 12 | 0 | 65° – 74° |
| July | 85° | 63° | 3.9" | 0.0" | 10 | 0 | 69° – 79° |
| August | 83° | 61° | 3.5" | 0.0" | 10 | 0 | 67° – 77° |
| September | 77° | 54° | 3.0" | 0.0" | 9 | 0 | 61° – 70° |
| October | 64° | 44° | 2.8" | 0.0" | 10 | 0 | 50° – 60° |
| November | 50° | 33° | 2.6" | 1.0" | 11 | 1 | 35° – 48° |
| December | 38° | 25° | 2.4" | 5.0" | 11 | 6 | 19° – 42° |
| Year | 61° | 42° | 36.2" | 23.0" | 133 | 31 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 15° to 40°. September is the most reliable, staying within 9°.
Where Custar’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 Custar’s center.
- Snow: Hoytville 2 Ne, OH.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Hoytville 2 Ne, OH, 6 miles from the town’s center, at about the same height; 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 Custar’s climate
What is the weather like in Custar?
A typical July afternoon reaches 85°, a January night drops to 19°, and about 23 inches of snow falls in a normal winter. Colder January nights than 63% of U.S. towns; cooler July afternoons than 53% of U.S. towns.
How cold does it get in Custar in winter?
January nights average 19°. About 140 nights a year reach 32° or below and 8 reach 0° or below. In the coldest January of the last 30 years the month averaged 17°.
How much snow does Custar get?
About 23 inches in a normal winter at Hoytville 2 Ne, OH, most of it in January, with snow on the ground about 31 days a year.
How hot does it get in Custar?
July, with a typical high of 85° and a low of 63°. About 19 days a year reach 90° (Hoytville 2 Ne, OH).
When is the first and last frost in Custar?
In half of years the last spring frost (32°) comes by April 24 and the first fall frost by October 21, about 179 frost-free days, at Hoytville 2 Ne, OH.
What growing zone is Custar in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −6°.
What is the best time of year to visit Custar?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Custar getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 53% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Custar.
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.