Noble County Jail and Sheriff's Office · Photo: Nyttend · Public domainThe climate in Caldwell sits close to the middle of U.S. towns
The coldest hours of a January night bottom out at 21° on average. Temperatures cover 64° across the year, low to high. Garden planting can start around April 30; autumn frost returns near October 14.
A year in Caldwell at a glance
Each month’s typical high and low, and what it brings.
What stands out about Caldwell’s climate
Compared with towns across the U.S., with Caldwell’s place in Ohio beside it.
What a year in Caldwell 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 April 30 and the first by October 14. Frost and day counts come from NOAA’s station at Caldwell 3se, OH, 4 miles from the town’s center, 120 ft higher.
The 2023 USDA map puts Caldwell’s center in zone 6b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −2°. 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 16 inches of snow a winter
Snow, measured at Beverly Stp, OH, falls mostly in January. Precipitation (rain plus melted snow) adds up to 42 inches a year; June is the wettest month and February the driest. Rain or snow falls on about 138 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Caldwell
89% 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 Caldwell 3se, OH.
Living with Caldwell’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
167 frost-free days in zone 6b. The last frost comes by Apr 30 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 14.
Months with highs of 62–84° and lows of 40° or more: April, May, June, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Caldwell from natural hazards, river flooding is the largest share (79%); heat waves, cold waves, winter storms and ice storms together are 6%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Caldwell and its neighbors
Every town next door is within a degree of Caldwell in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Caldwell’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 |
|---|---|---|---|---|
| Caldwell, OH | 21° | 85° | 42" | 16" |
| Connersville, IN | 20° | 85° | 44" | 16" |
| Mattoon, IL | 20° | 86° | 41" | 15" |
| Harrisonburg, VA | 24° | 85° | 42" | 19" |
| Lititz, PA | 22° | 86° | 45" | 21" |
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 Caldwell averaged 1.1° warmer than the 1900s. The biggest change is in December (+2.5°).
A smaller shift than in 74% 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 Caldwell compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Caldwell’s place among Ohio’s.
Caldwell weather by month
Highs, lows and precipitation from NOAA’s grid at Caldwell’s center; snow, wet days and snow on the ground from Beverly Stp, OH. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 39° | 21° | 3.2" | 7.1" | 13 | 22° – 40° |
| February | 43° | 23° | 2.6" | 4.3" | 12 | 21° – 42° |
| March | 53° | 31° | 3.4" | 1.8" | 12 | 35° – 53° |
| April | 66° | 40° | 3.7" | 0.1" | 12 | 47° – 58° |
| May | 74° | 50° | 4.1" | 0.0" | 14 | 55° – 69° |
| June | 82° | 58° | 4.5" | 0.0" | 12 | 66° – 73° |
| July | 85° | 62° | 4.5" | 0.0" | 11 | 69° – 77° |
| August | 84° | 61° | 3.5" | 0.0" | 11 | 68° – 77° |
| September | 78° | 54° | 3.3" | 0.0" | 9 | 63° – 71° |
| October | 66° | 42° | 3.0" | 0.0" | 11 | 51° – 60° |
| November | 54° | 33° | 3.0" | 0.2" | 10 | 36° – 49° |
| December | 43° | 26° | 3.3" | 2.2" | 12 | 24° – 45° |
| Year | 64° | 42° | 42.0" | 15.7" | 138 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 24° to 45°. June is the most reliable, staying within 7°.
Where Caldwell’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 Caldwell’s center.
- Snow: Beverly Stp, OH.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Caldwell 3se, OH, 4 miles from the town’s center, 120 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 Caldwell’s climate
What is the weather like in Caldwell?
A typical July afternoon reaches 85°, a January night drops to 21°, and about 16 inches of snow falls in a normal winter. Colder January nights than 54% of U.S. towns; cooler July afternoons than 51% of U.S. towns.
How cold does it get in Caldwell in winter?
January nights average 21°. About 126 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 22°.
How much snow does Caldwell get?
About 16 inches in a normal winter at Beverly Stp, OH, most of it in January.
How hot does it get in Caldwell?
July, with a typical high of 85° and a low of 62°. About 7 days a year reach 90° (Caldwell 3se, OH).
When is the first and last frost in Caldwell?
In half of years the last spring frost (32°) comes by April 30 and the first fall frost by October 14, about 167 frost-free days, at Caldwell 3se, OH.
What growing zone is Caldwell in?
Zone 6b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −2°.
What is the best time of year to visit Caldwell?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Caldwell getting warmer?
Yes: 1991–2020 averaged 1.1° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 74% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Caldwell.
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.