Franklin, Ohio climate: Normal weather by month, frost dates and records
Franklin's normal year runs from 20°F January nights to 86°F July afternoons, with 42.3 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.5°C, January lows of −6°C, July highs of 30°C, 1,075 mm of precipitation a year.
- NOAA stationFranklin
- Station IDUSC00332928
- Location39.55°N 84.32°W
- Elevation679 ft (207 m)
- From the center1 miles
- Population11,758
On October 22, the normal high in Franklin is 64°F and the normal low 39°F, and the chance of measurable rain or snow is 28%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Franklin.
- Jan 38° 20°
- Feb 42° 22°
- Mar 52° 30°
- Apr 65° 39°
- May 74° 51°
- Jun 82° 60°
- Jul 86° 64°
- Aug 85° 61°
- Sep 79° 53°
- Oct 67° 41°
- Nov 53° 32°
- Dec 43° 26°
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 Franklin each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 20°F. The most precipitation falls in April (4.58 in), the least in February (2.54 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 38°F | 20°F | 29.4°F | 3.32 | 9 | <1 | 26 | 9 h 40 min |
| February | 42°F | 22°F | 31.9°F | 2.54 | 9 | <1 | 23 | 10 h 40 min |
| March | 52°F | 30°F | 41.1°F | 3.46 | 11 | <1 | 18 | 11 h 50 min |
| April | 65°F | 39°F | 52.0°F | 4.58 | 11 | <1 | 7 | 13 h 10 min |
| May | 74°F | 51°F | 62.4°F | 4.40 | 11 | <1 | <1 | 14 h 20 min |
| June | 82°F | 60°F | 71.1°F | 4.45 | 10 | 4 | <1 | 15 h |
| July | 86°F | 64°F | 74.6°F | 4.34 | 9 | 8 | <1 | 14 h 40 min |
| August | 85°F | 61°F | 73.1°F | 2.87 | 7 | 7 | <1 | 13 h 50 min |
| September | 79°F | 53°F | 66.0°F | 2.87 | 7 | 3 | <1 | 12 h 30 min |
| October | 67°F | 41°F | 53.9°F | 3.20 | 8 | <1 | 5 | 11 h 10 min |
| November | 53°F | 32°F | 42.6°F | 3.03 | 9 | <1 | 17 | 10 h |
| December | 43°F | 26°F | 34.0°F | 3.25 | 9 | <1 | 24 | 9 h 20 min |
| Year (annual) | 64°F | 42°F | 52.7°F | 42.31 | 109 | 22 | 120 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 4°C | −6°C | −1.4°C | 84 mm |
| February | 6°C | −6°C | −0.1°C | 65 mm |
| March | 11°C | −1°C | 5.1°C | 88 mm |
| April | 18°C | 4°C | 11.1°C | 116 mm |
| May | 23°C | 10°C | 16.9°C | 112 mm |
| June | 28°C | 16°C | 21.7°C | 113 mm |
| July | 30°C | 18°C | 23.7°C | 110 mm |
| August | 30°C | 16°C | 22.8°C | 73 mm |
| September | 26°C | 12°C | 18.9°C | 73 mm |
| October | 19°C | 5°C | 12.2°C | 81 mm |
| November | 12°C | 0°C | 5.9°C | 77 mm |
| December | 6°C | −4°C | 1.1°C | 83 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Dayton Mcd (16 miles away), gets 12 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00332928; 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 Franklin?
Normal highs sit between 65°F and 85°F in May, June, September and October. Of those, September has the fewest days with rain (7).
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 USC00332928.
When is the last frost in Franklin?
In Franklin, the last spring frost (32°F) comes after April 24 in half of years and after May 11 in one year in ten; the first autumn frost comes before October 19 in half of years and before October 7 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 241 year in 10 after May 11; 9 in 10 after April 9
- First autumn frost, half of years before
- October 191 year in 10 before October 7; 9 in 10 before November 1
NOAA puts the median frost-free season at 178 days, and the season without a hard freeze (28°F) at 199 days.
A hard freeze (28°F) comes after April 11 in half of springs and before October 29 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Franklin in zone 6b in ZIP code 45005.
Frost dates for every NOAA station in Ohio · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00332928; 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 Franklin?
In a normal year in Franklin, 22 days a year reach 90°F, 120 nights fall to 32°F or colder and 109 days bring measurable precipitation.
- Days at 90°F or more
- 22a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 120a normal year
- Days that stay below freezing
- 24high of 32°F or less
- Days with 0.01 inch of precipitation
- 109a normal year
The highest temperature in this station's record (since 1953) is 103°F, on July 7, 2012; the lowest is −25°F, on January 29, 1963.
The wettest calendar year on that record is 2018, with 50.46 in; the snowiest season is 1950–51, with 35.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00332928; records: ACIS (NOAA Regional Climate Centers), station USC00332928. Records use complete months only; a month missing more than three days is left out.
How sunny is Franklin?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Franklin, 4.0 kWh per square metre a day. August is the sunniest month (81%) and December the cloudiest (58%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 59% | 1.8 |
| February | 62% | 2.6 |
| March | 65% | 3.6 |
| April | 71% | 4.9 |
| May | 72% | 5.5 |
| June | 78% | 6.2 |
| July | 79% | 6.0 |
| August | 81% | 5.5 |
| September | 79% | 4.6 |
| October | 72% | 3.2 |
| November | 69% | 2.2 |
| December | 58% | 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 Franklin need?
A normal year in Franklin brings 5,409 heating degree days, 1% more than the median U.S. place (5,373), and 956 cooling degree days, 5% more 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 3,407 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,104 | 0 |
| February | 927 | 0 |
| March | 742 | 1 |
| April | 399 | 9 |
| May | 150 | 68 |
| June | 19 | 203 |
| July | 2 | 301 |
| August | 4 | 255 |
| September | 77 | 107 |
| October | 355 | 12 |
| November | 671 | 0 |
| December | 961 | 0 |
| Year (annual) | 5,409 | 956 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00332928. 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 Franklin been warmer than normal lately?
2025 averaged 52.7°F, equal to the 1991-2020 normal of 52.7°F. 1 of the 2 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 54.4°F | +1.7°F | 43.96 |
| 2025 | 52.7°F | at normal | 42.75 |
Over 33 complete years from 1957 to 2025, the station's annual mean temperature rose at a fitted 5.3°F per century (+0.29°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00332928; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Franklin's climate compare?
Franklin is warmer than 72 of the other 98 places with their own NOAA record in Ohio, and wetter than 58. Across the 7,247 U.S. stations with normals, its annual mean of 52.7°F is warmer than 52%.
In the Köppen classification computed from these normals, Franklin 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 Franklin share this climate record?
15 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.
- Kettering, OHalso near: Xenia (14 mi, 53.7°F a year); Dayton (15 mi, 53.9°F a year)57,028 people · 13 mi NE
- Middletown, OHalso near: Hamilton (13 mi, 53.8°F a year); Fairfield (16 mi, 53.6°F a year)52,291 people · 4 mi SW
- Centerville, OH26,311 people · 11 mi NE
- Lebanon, OH21,995 people · 10 mi SE
- Miamisburg, OH20,253 people · 6 mi NE
- Springboro, OH19,646 people · 5 mi E
- Monroe, OH15,950 people · 8 mi S
- West Carrollton, OH12,911 people · 9 mi NE
- Moraine, OH6,603 people · 11 mi N
- Germantown, OH5,863 people · 6 mi NW
- Carlisle, OH5,855 people · 2 mi N
- Hunter, OH4,108 people · 4 mi SE
- Five Points, OH1,928 people · 7 mi E
- Farmersville, OH997 people · 10 mi NW
- Jacksonburg, OH53 people · 10 mi W
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 Franklin's climate
What is the coldest month in Franklin?
January, with a normal high of 38°F and a normal low of 20°F. The warmest is July (86°F by day, 64°F at night).
Does it snow in Franklin?
Yes. NOAA publishes no 1991-2020 snowfall normal for Franklin's NOAA station; the nearest record that keeps one, Dayton Mcd (16 miles away), records 12 inches of snow in a normal year.
What is the rainiest month in Franklin?
April, with 4.58 in of precipitation in a normal year; the driest is February with 2.54 in.
What plant hardiness zone is Franklin in?
The USDA's 2023 map puts Franklin in zone 6b in ZIP code 45005.
How late can frost come in Franklin?
In half of years the last 32°F night comes after April 24; in one year in ten it comes after May 11. Waiting until May 11 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Ohio climateThe statewide normals and every place in the state
- Hamilton, OH17 miles from this station, 53.8°F a year
- Fairfield, OH21 miles from this station, 53.6°F a year
- Eaton, OH21 miles from this station, 51.2°F a year
- Xenia, OH22 miles from this station, 53.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made