Caldwell, Ohio climate: Normal weather by month, frost dates and records
Caldwell's normal year runs from 20°F January nights to 82°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.8°C, January lows of −7°C, July highs of 28°C.
- NOAA stationCaldwell (3 mi SE)
- Station IDUSC00331175
- Location39.72°N 81.46°W
- Elevation880 ft (268 m)
- Population1,863
On October 23, the normal high in Caldwell is 63°F and the normal low 38°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Caldwell.
- Jan 39° 20°
- Feb 42° 22°
- Mar 53° 28°
- Apr 64° 38°
- May 73° 48°
- Jun 80° 57°
- Jul 82° 62°
- Aug 82° 59°
- Sep 77° 52°
- Oct 66° 41°
- Nov 54° 32°
- Dec 44° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Caldwell each month?
July is the warmest month, with normal highs of 82°F; January the coldest, with normal lows of 20°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 39°F | 20°F | 29.1°F | – | <1 | 26 | 9 h 40 min |
| February | 42°F | 22°F | 31.8°F | – | <1 | 24 | 10 h 40 min |
| March | 53°F | 28°F | 40.4°F | – | <1 | 20 | 11 h 50 min |
| April | 64°F | 38°F | 51.2°F | – | <1 | 8 | 13 h 10 min |
| May | 73°F | 48°F | 60.6°F | – | <1 | 1 | 14 h 20 min |
| June | 80°F | 57°F | 68.3°F | – | 1 | <1 | 15 h |
| July | 82°F | 62°F | 71.9°F | – | 2 | <1 | 14 h 40 min |
| August | 82°F | 59°F | 70.7°F | – | 3 | <1 | 13 h 50 min |
| September | 77°F | 52°F | 64.2°F | – | 1 | <1 | 12 h 30 min |
| October | 66°F | 41°F | 53.4°F | – | <1 | 5 | 11 h 10 min |
| November | 54°F | 32°F | 42.6°F | – | <1 | 16 | 10 h |
| December | 44°F | 25°F | 34.4°F | – | <1 | 25 | 9 h 20 min |
| Year (annual) | 63°F | 40°F | 51.5°F | – | 7 | 126 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 4°C | −7°C | −1.6°C |
| February | 6°C | −6°C | −0.1°C |
| March | 11°C | −2°C | 4.7°C |
| April | 18°C | 3°C | 10.7°C |
| May | 23°C | 9°C | 15.9°C |
| June | 27°C | 14°C | 20.2°C |
| July | 28°C | 16°C | 22.2°C |
| August | 28°C | 15°C | 21.5°C |
| September | 25°C | 11°C | 17.9°C |
| October | 19°C | 5°C | 11.9°C |
| November | 12°C | 0°C | 5.9°C |
| December | 6°C | −4°C | 1.3°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Beverly (15 miles away), gets 16 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00331175; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Caldwell?
Normal highs sit between 65°F and 85°F in May, June, July, August, September and October.
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00331175.
When is the last frost in Caldwell?
In Caldwell, the last spring frost (32°F) comes after April 30 in half of years and after May 20 in one year in ten; the first autumn frost comes before October 14 in half of years and before September 30 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 301 year in 10 after May 20; 9 in 10 after April 15
- First autumn frost, half of years before
- October 141 year in 10 before September 30; 9 in 10 before November 1
NOAA puts the median frost-free season at 167 days, and the season without a hard freeze (28°F) at 191 days.
A hard freeze (28°F) comes after April 19 in half of springs and before October 27 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Caldwell in zone 6b in ZIP code 43724, the nearest ZIP area.
Frost dates for every NOAA station in Ohio · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00331175; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Caldwell?
In a normal year in Caldwell, 7 days a year reach 90°F and 126 nights fall to 32°F or colder.
- Days at 90°F or more
- 7a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 126a normal year
- Days that stay below freezing
- 25high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00331175.
How sunny is Caldwell?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Caldwell, 3.9 kWh per square metre a day. August is the sunniest month (79%) and December the cloudiest (56%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 57% | 1.7 |
| February | 59% | 2.5 |
| March | 64% | 3.6 |
| April | 69% | 4.8 |
| May | 71% | 5.5 |
| June | 76% | 6.1 |
| July | 77% | 5.9 |
| August | 79% | 5.4 |
| September | 78% | 4.5 |
| October | 70% | 3.1 |
| November | 68% | 2.2 |
| December | 56% | 1.5 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Caldwell need?
A normal year in Caldwell brings 5,527 heating degree days, 3% more than the median U.S. place (5,373), and 657 cooling degree days, 28% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,016 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,111 | 0 |
| February | 930 | 0 |
| March | 764 | 0 |
| April | 419 | 5 |
| May | 181 | 43 |
| June | 33 | 132 |
| July | 5 | 217 |
| August | 10 | 185 |
| September | 88 | 64 |
| October | 369 | 12 |
| November | 671 | 0 |
| December | 947 | 0 |
| Year (annual) | 5,527 | 657 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00331175. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Caldwell's climate compare?
Caldwell is warmer than 50 of the other 98 places with their own NOAA record in Ohio. Across the 7,247 U.S. stations with normals, its annual mean of 51.5°F is warmer than 47%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Caldwell share this climate record?
7 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Summerfield, OH242 people · 9 mi NE
- Belle Valley, OH199 people · 7 mi NW
- Lewisville, OH176 people · 14 mi E
- Sarahsville, OH150 people · 6 mi N
- Macksburg, OH113 people · 6 mi S
- Dexter City, OH83 people · 4 mi S
- Stafford, OH67 people · 10 mi E
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Caldwell's climate
What is the coldest month in Caldwell?
January, with a normal high of 39°F and a normal low of 20°F. The warmest is July (82°F by day, 62°F at night).
Does it snow in Caldwell?
Yes. NOAA publishes no 1991-2020 snowfall normal for Caldwell's NOAA station; the nearest record that keeps one, Beverly (15 miles away), records 16 inches of snow in a normal year.
What plant hardiness zone is Caldwell in?
The USDA's 2023 map puts Caldwell in zone 6b in ZIP code 43724, the nearest ZIP area.
How late can frost come in Caldwell?
In half of years the last 32°F night comes after April 30; in one year in ten it comes after May 20. Waiting until May 20 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Ohio climateThe statewide normals and every place in the state
- Beverly, OH14 miles from this station, 52.9°F a year
- Cambridge, OH21 miles from this station, 52.7°F a year
- McConnellsville Lake 7, OH21 miles from this station, 52.2°F a year
- Marietta, OH21 miles from this station, 53.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made