Jefferson City, Tennessee climate: Normal weather by month, frost dates and records
Jefferson City's normal year runs from 25°F January nights to 87°F July afternoons, with 48.5 inches of precipitation and 3 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.3°C, January lows of −4°C, July highs of 31°C, 1,233 mm of precipitation a year.
- NOAA stationJefferson City
- Station IDUSC00404613
- Location36.12°N 83.47°W
- Elevation1,108 ft (338 m)
- From the centerunder 1 mile
- Population9,013
On October 23, the normal high in Jefferson City is 69°F and the normal low 39°F, and the chance of measurable rain or snow is 24%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Jefferson City.
- Jan 47° 25°
- Feb 51° 27°
- Mar 61° 32°
- Apr 70° 41°
- May 78° 50°
- Jun 84° 59°
- Jul 87° 63°
- Aug 87° 62°
- Sep 82° 55°
- Oct 71° 42°
- Nov 60° 32°
- Dec 50° 27°
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 Jefferson City each month?
July is the warmest month, with normal highs of 87°F; January the coldest, with normal lows of 25°F. The most precipitation falls in July (5.05 in), the least in October (2.69 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 47°F | 25°F | 35.9°F | 4.12 | 1.3 | 10 | <1 | 22 | 10 h |
| February | 51°F | 27°F | 39.1°F | 4.46 | 1.5 | 10 | <1 | 19 | 10 h 50 min |
| March | 61°F | 32°F | 46.2°F | 4.64 | 0.0 | 11 | <1 | 14 | 11 h 50 min |
| April | 70°F | 41°F | 55.1°F | 4.64 | 0.0 | 10 | <1 | 5 | 13 h |
| May | 78°F | 50°F | 64.2°F | 4.10 | 0.0 | 10 | <1 | 1 | 14 h |
| June | 84°F | 59°F | 71.8°F | 3.75 | 0.0 | 11 | 4 | <1 | 14 h 40 min |
| July | 87°F | 63°F | 75.0°F | 5.05 | 0.0 | 11 | 8 | <1 | 14 h 20 min |
| August | 87°F | 62°F | 74.2°F | 3.84 | 0.0 | 8 | 9 | <1 | 13 h 30 min |
| September | 82°F | 55°F | 68.2°F | 3.33 | 0.0 | 7 | 3 | <1 | 12 h 30 min |
| October | 71°F | 42°F | 56.6°F | 2.69 | 0.0 | 7 | <1 | 6 | 11 h 20 min |
| November | 60°F | 32°F | 45.9°F | 3.36 | 0.1 | 8 | <1 | 15 | 10 h 20 min |
| December | 50°F | 27°F | 38.6°F | 4.55 | 0.1 | 10 | <1 | 22 | 9 h 40 min |
| Year (annual) | 69°F | 43°F | 55.9°F | 48.53 | 3.0 | 113 | 24 | 103 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 9°C | −4°C | 2.2°C | 105 mm | 3 cm |
| February | 11°C | −3°C | 3.9°C | 113 mm | 4 cm |
| March | 16°C | 0°C | 7.9°C | 118 mm | 0 cm |
| April | 21°C | 5°C | 12.8°C | 118 mm | 0 cm |
| May | 26°C | 10°C | 17.9°C | 104 mm | 0 cm |
| June | 29°C | 15°C | 22.1°C | 95 mm | 0 cm |
| July | 31°C | 17°C | 23.9°C | 128 mm | 0 cm |
| August | 30°C | 17°C | 23.4°C | 98 mm | 0 cm |
| September | 28°C | 13°C | 20.1°C | 85 mm | 0 cm |
| October | 22°C | 5°C | 13.7°C | 68 mm | 0 cm |
| November | 16°C | 0°C | 7.7°C | 85 mm | 0 cm |
| December | 10°C | −3°C | 3.7°C | 116 mm | 0 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00404613; 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 Jefferson City?
Normal highs sit between 65°F and 85°F in April, May, June, September and October. Of those, October 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 USC00404613.
When is the last frost in Jefferson City?
In Jefferson City, the last spring frost (32°F) comes after April 24 in half of years and after May 13 in one year in ten; the first autumn frost comes before October 17 in half of years and before October 6 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 13; 9 in 10 after April 10
- First autumn frost, half of years before
- October 171 year in 10 before October 6; 9 in 10 before November 1
NOAA puts the median frost-free season at 175 days, and the season without a hard freeze (28°F) at 196 days.
A hard freeze (28°F) comes after April 11 in half of springs and before October 27 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Jefferson City in zone 7b in ZIP code 37760.
Frost dates for every NOAA station in Tennessee · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00404613; 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 Jefferson City?
In a normal year in Jefferson City, 24 days a year reach 90°F, 103 nights fall to 32°F or colder and 113 days bring measurable precipitation.
- Days at 90°F or more
- 24a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 103a normal year
- Days that stay below freezing
- 5high of 32°F or less
- Days with 0.01 inch of precipitation
- 113a normal year
- Days with 1 inch of snow or more
- 1a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00404613.
How sunny is Jefferson City?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Jefferson City, 4.2 kWh per square metre a day. August is the sunniest month (79%) and February the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 64% | 2.2 |
| February | 62% | 2.8 |
| March | 67% | 4.0 |
| April | 73% | 5.2 |
| May | 74% | 5.8 |
| June | 78% | 6.3 |
| July | 76% | 5.9 |
| August | 79% | 5.5 |
| September | 78% | 4.7 |
| October | 75% | 3.6 |
| November | 74% | 2.7 |
| December | 64% | 1.9 |
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 Jefferson City need?
A normal year in Jefferson City brings 4,338 heating degree days, 19% fewer than the median U.S. place (5,373), and 1,042 cooling degree days, 15% 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 3,763 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 900 | 0 |
| February | 727 | 0 |
| March | 585 | 0 |
| April | 307 | 9 |
| May | 98 | 72 |
| June | 10 | 213 |
| July | 1 | 310 |
| August | 1 | 286 |
| September | 39 | 136 |
| October | 276 | 16 |
| November | 576 | 1 |
| December | 818 | 0 |
| Year (annual) | 4,338 | 1,042 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00404613. 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 Jefferson City's climate compare?
Jefferson City is warmer than 12 of the other 115 places with their own NOAA record in Tennessee, and wetter than 9. Across the 7,247 U.S. stations with normals, its annual mean of 55.9°F is warmer than 63%.
In the Köppen classification computed from these normals, Jefferson City is Cfa: temperate, 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 Jefferson City share this climate record?
5 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.
- Dandridge, TN3,841 people · 7 mi S
- Blaine, TN2,167 people · 12 mi W
- New Market, TN1,416 people · 5 mi W
- Rutledge, TN1,348 people · 11 mi N
- Luttrell, TN1,086 people · 16 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 Jefferson City's climate
What is the coldest month in Jefferson City?
January, with a normal high of 47°F and a normal low of 25°F. The warmest is July (87°F by day, 63°F at night).
Does it snow in Jefferson City?
Yes: 3 inches in a normal year, falling on 2 days with 0.1 inch or more, the most in February (1.5 inches).
What is the rainiest month in Jefferson City?
July, with 5.05 in of precipitation in a normal year; the driest is October with 2.69 in.
What plant hardiness zone is Jefferson City in?
The USDA's 2023 map puts Jefferson City in zone 7b in ZIP code 37760.
How late can frost come in Jefferson City?
In half of years the last 32°F night comes after April 24; in one year in ten it comes after May 13. Waiting until May 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Tennessee climateThe statewide normals and every place in the state
- Morristown, TN10 miles from this station, 57.3°F a year
- Sevierville, TN15 miles from this station, 59.0°F a year
- Newport, TN18 miles from this station, 58.7°F a year
- Tazewell, TN24 miles from this station, 54.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made