Circleville, Ohio climate: Normal weather by month, frost dates and records
Circleville's normal year runs from 23°F January nights to 86°F July afternoons, with 40.9 inches of precipitation and 15 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.4°C, January lows of −5°C, July highs of 30°C, 1,040 mm of precipitation a year.
- NOAA stationCircleville
- Station IDUSC00331592
- Location39.61°N 82.96°W
- Elevation675 ft (206 m)
- Population14,433
On October 23, the normal high in Circleville is 65°F and the normal low 43°F, and the chance of measurable rain or snow is 32%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Circleville.
- Jan 39° 23°
- Feb 42° 25°
- Mar 52° 33°
- Apr 66° 42°
- May 75° 53°
- Jun 83° 62°
- Jul 86° 65°
- Aug 85° 64°
- Sep 80° 57°
- Oct 68° 45°
- Nov 54° 35°
- Dec 43° 28°
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 Circleville each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 23°F. The most precipitation falls in June (4.65 in), the least in February (2.51 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 39°F | 23°F | 30.8°F | 2.89 | 6.7 | 12 | <1 | 25 | 9 h 40 min |
| February | 42°F | 25°F | 33.5°F | 2.51 | 4.6 | 10 | <1 | 22 | 10 h 40 min |
| March | 52°F | 33°F | 42.3°F | 3.26 | 1.5 | 11 | <1 | 18 | 11 h 50 min |
| April | 66°F | 42°F | 53.8°F | 3.99 | 0.2 | 12 | <1 | 6 | 13 h 10 min |
| May | 75°F | 53°F | 64.0°F | 4.47 | 0.0 | 13 | 1 | <1 | 14 h 20 min |
| June | 83°F | 62°F | 72.6°F | 4.65 | 0.0 | 11 | 4 | <1 | 15 h |
| July | 86°F | 65°F | 75.4°F | 3.86 | 0.0 | 10 | 7 | <1 | 14 h 40 min |
| August | 85°F | 64°F | 74.2°F | 3.42 | 0.0 | 9 | 5 | <1 | 13 h 50 min |
| September | 80°F | 57°F | 68.0°F | 2.96 | 0.0 | 8 | 3 | <1 | 12 h 30 min |
| October | 68°F | 45°F | 56.3°F | 2.99 | 0.0 | 9 | <1 | 3 | 11 h 10 min |
| November | 54°F | 35°F | 44.6°F | 2.84 | 0.4 | 10 | <1 | 15 | 10 h |
| December | 43°F | 28°F | 35.7°F | 3.10 | 2.0 | 11 | <1 | 22 | 9 h 20 min |
| Year (annual) | 64°F | 44°F | 54.3°F | 40.94 | 15.4 | 128 | 19 | 110 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −5°C | −0.7°C | 73 mm | 17 cm |
| February | 6°C | −4°C | 0.8°C | 64 mm | 12 cm |
| March | 11°C | 0°C | 5.7°C | 83 mm | 4 cm |
| April | 19°C | 6°C | 12.1°C | 101 mm | 1 cm |
| May | 24°C | 12°C | 17.8°C | 114 mm | 0 cm |
| June | 28°C | 17°C | 22.6°C | 118 mm | 0 cm |
| July | 30°C | 18°C | 24.1°C | 98 mm | 0 cm |
| August | 29°C | 18°C | 23.4°C | 87 mm | 0 cm |
| September | 26°C | 14°C | 20.0°C | 75 mm | 0 cm |
| October | 20°C | 7°C | 13.5°C | 76 mm | 0 cm |
| November | 12°C | 2°C | 7.0°C | 72 mm | 1 cm |
| December | 6°C | −2°C | 2.1°C | 79 mm | 5 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00331592; 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 Circleville?
Normal highs sit between 65°F and 85°F in April, May, June, August, September and October. Of those, September has the fewest days with rain (8).
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 USC00331592.
When is the last frost in Circleville?
In Circleville, the last spring frost (32°F) comes after April 17 in half of years and after May 4 in one year in ten; the first autumn frost comes before October 28 in half of years and before October 14 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 171 year in 10 after May 4; 9 in 10 after April 2
- First autumn frost, half of years before
- October 281 year in 10 before October 14; 9 in 10 before November 9
NOAA puts the median frost-free season at 192 days, and the season without a hard freeze (28°F) at 216 days.
A hard freeze (28°F) comes after April 4 in half of springs and before November 7 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Circleville in zone 6b in ZIP code 43113, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Circleville's NOAA station is in zone 6b: the coldest night of a typical year reaches −2°F (26 complete years).
Frost dates for every NOAA station in Ohio · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00331592; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 Circleville?
In a normal year in Circleville, 19 days a year reach 90°F, 110 nights fall to 32°F or colder and 128 days bring measurable precipitation.
- Days at 90°F or more
- 19a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 110a normal year
- Days that stay below freezing
- 27high of 32°F or less
- Days with 0.01 inch of precipitation
- 128a normal year
- Days with 1 inch of snow or more
- 8a normal year
The highest temperature in this station's record (since 1894) is 109°F, on July 20, 1930; the lowest is −23°F, on January 13, 1912.
The wettest calendar year on that record is 2018, with 56.82 in; the snowiest season is 1977–78, with 47.2 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00331592; records: ACIS (NOAA Regional Climate Centers), station USC00331592. Records use complete months only; a month missing more than three days is left out.
How sunny is Circleville?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Circleville, 3.9 kWh per square metre a day. August is the sunniest month (80%) and December the cloudiest (56%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 57% | 1.7 |
| February | 60% | 2.5 |
| March | 64% | 3.6 |
| April | 70% | 4.8 |
| May | 72% | 5.5 |
| June | 77% | 6.1 |
| July | 78% | 5.9 |
| August | 80% | 5.5 |
| September | 79% | 4.5 |
| October | 71% | 3.1 |
| November | 69% | 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 Circleville need?
A normal year in Circleville brings 5,003 heating degree days, 7% fewer than the median U.S. place (5,373), and 1,129 cooling degree days, 24% more than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,751 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,060 | 0 |
| February | 882 | 0 |
| March | 706 | 2 |
| April | 352 | 16 |
| May | 124 | 91 |
| June | 13 | 239 |
| July | 1 | 325 |
| August | 2 | 289 |
| September | 52 | 142 |
| October | 293 | 25 |
| November | 613 | 1 |
| December | 907 | 0 |
| Year (annual) | 5,003 | 1,129 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00331592. 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.
Has Circleville been warmer than normal lately?
2025 averaged 53.3°F, 1.0°F below the 1991-2020 normal of 54.3°F. 2 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 54.1°F | −0.2°F | 36.84 | – |
| 2022 | 52.5°F | −1.8°F | 40.62 | – |
| 2023 | 54.5°F | +0.2°F | 33.60 | – |
| 2024 | 56.0°F | +1.7°F | 35.51 | 4.3 |
| 2025 | 53.3°F | −1.0°F | 49.46 | 17.8 |
Over 85 complete years from 1895 to 2025, the station's annual mean temperature rose at a fitted 1.8°F per century (+0.10°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00331592; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Circleville's climate compare?
Circleville is warmer than 94 of the other 98 places with their own NOAA record in Ohio, and wetter than 40. Across the 7,247 U.S. stations with normals, its annual mean of 54.3°F is warmer than 58%.
In the Köppen classification computed from these normals, Circleville is Dfa: continental, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Circleville share this climate record?
11 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.
- Ashville, OH4,758 people · 8 mi N
- South Bloomfield, OH3,747 people · 8 mi N
- Commercial Point, OH3,221 people · 13 mi N
- Logan Elm Village, OH1,238 people · 3 mi S
- Williamsport, OH1,016 people · 9 mi W
- Stoutsville, OH580 people · 7 mi E
- Laurelville, OH505 people · 15 mi SE
- Derby, OH433 people · 17 mi NW
- Adelphi, OH311 people · 15 mi SE
- Tarlton, OH266 people · 10 mi E
- Darbyville, OH189 people · 10 mi NW
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 Circleville's climate
What is the coldest month in Circleville?
January, with a normal high of 39°F and a normal low of 23°F. The warmest is July (86°F by day, 65°F at night).
Does it snow in Circleville?
Yes: 15 inches in a normal year, falling on 13 days with 0.1 inch or more, the most in January (6.7 inches).
What is the rainiest month in Circleville?
June, with 4.65 in of precipitation in a normal year; the driest is February with 2.51 in.
What plant hardiness zone is Circleville in?
The USDA's 2023 map puts Circleville in zone 6b in ZIP code 43113, the nearest ZIP area. By the same method at Circleville's NOAA station, the coldest night of a typical year reaches −2°F (26 years, 1991-2020): zone 6b.
How late can frost come in Circleville?
In half of years the last 32°F night comes after April 17; in one year in ten it comes after May 4. Waiting until May 4 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Ohio climateThe statewide normals and every place in the state
- Chillicothe, OH17 miles from this station, 53.5°F a year
- Lancaster, OH19 miles from this station, 52.2°F a year
- Washington Court House, OH25 miles from this station, 51.8°F a year
- Columbus, OH27 miles from this station, 53.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made