Hartsville/Trousdale County, Tennessee climate: Normal weather by month, frost dates and records
Hartsville/Trousdale County's normal year runs from 27°F January nights to 88°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.4°C, January lows of −3°C, July highs of 31°C.
- NOAA stationHartsville
- Station IDUSC00403938
- Location36.38°N 86.18°W
- Elevation511 ft (156 m)
- Population12,159
On October 14, the normal high in Hartsville/Trousdale County is 73°F and the normal low 46°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Hartsville/Trousdale County.
- Jan 48° 27°
- Feb 52° 30°
- Mar 60° 36°
- Apr 71° 45°
- May 78° 54°
- Jun 85° 62°
- Jul 88° 66°
- Aug 88° 65°
- Sep 83° 59°
- Oct 72° 46°
- Nov 60° 36°
- Dec 50° 31°
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 Hartsville/Trousdale County each month?
July is the warmest month, with normal highs of 88°F; January the coldest, with normal lows of 27°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 48°F | 27°F | 37.1°F | – | <1 | 22 | 10 h |
| February | 52°F | 30°F | 40.8°F | – | <1 | 18 | 10 h 50 min |
| March | 60°F | 36°F | 48.3°F | – | <1 | 10 | 11 h 50 min |
| April | 71°F | 45°F | 57.6°F | – | <1 | 2 | 13 h |
| May | 78°F | 54°F | 65.9°F | – | <1 | <1 | 14 h |
| June | 85°F | 62°F | 73.3°F | – | 6 | <1 | 14 h 40 min |
| July | 88°F | 66°F | 77.0°F | – | 13 | <1 | 14 h 30 min |
| August | 88°F | 65°F | 76.4°F | – | 16 | <1 | 13 h 40 min |
| September | 83°F | 59°F | 70.7°F | – | 5 | <1 | 12 h 30 min |
| October | 72°F | 46°F | 58.9°F | – | <1 | 2 | 11 h 20 min |
| November | 60°F | 36°F | 48.2°F | – | <1 | 9 | 10 h 20 min |
| December | 50°F | 31°F | 40.3°F | – | <1 | 19 | 9 h 40 min |
| Year (annual) | 70°F | 46°F | 57.9°F | – | 41 | 82 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 9°C | −3°C | 2.8°C |
| February | 11°C | −1°C | 4.9°C |
| March | 16°C | 2°C | 9.1°C |
| April | 21°C | 7°C | 14.2°C |
| May | 26°C | 12°C | 18.8°C |
| June | 29°C | 17°C | 22.9°C |
| July | 31°C | 19°C | 25.0°C |
| August | 31°C | 18°C | 24.7°C |
| September | 28°C | 15°C | 21.5°C |
| October | 22°C | 8°C | 14.9°C |
| November | 16°C | 2°C | 9.0°C |
| December | 10°C | −1°C | 4.6°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Bethpage (10 miles away), gets 5 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00403938; 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 Hartsville/Trousdale County?
Normal highs sit between 65°F and 85°F in April, May, June, 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 USC00403938.
When is the last frost in Hartsville/Trousdale County?
In Hartsville/Trousdale County, the last spring frost (32°F) comes after April 12 in half of years and after April 29 in one year in ten; the first autumn frost comes before October 26 in half of years and before October 13 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 121 year in 10 after April 29; 9 in 10 after March 29
- First autumn frost, half of years before
- October 261 year in 10 before October 13; 9 in 10 before November 6
NOAA puts the median frost-free season at 196 days, and the season without a hard freeze (28°F) at 218 days.
A hard freeze (28°F) comes after March 31 in half of springs and before November 4 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Hartsville/Trousdale County in zone 7b across its 4 ZIP code areas (7b in 37074, the largest).
Frost dates for every NOAA station in Tennessee · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00403938; 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.
What hardiness zone is each Hartsville/Trousdale County ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Hartsville/Trousdale County's 4 ZIP code areas are all in zone 7b. Each ZIP's frost dates are in the frost tool.
Source: USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; ZIP areas in the place: Census Bureau 2020 ZCTA-to-place relationship file. A ZIP area counts when at least a tenth of its land (and 0.5 km²) lies in the place.
How hot and how cold does it get in Hartsville/Trousdale County?
In a normal year in Hartsville/Trousdale County, 41 days a year reach 90°F (1 of them 100°F or more) and 82 nights fall to 32°F or colder.
- Days at 90°F or more
- 41a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 82a normal year
- Days that stay below freezing
- 7high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00403938.
How sunny is Hartsville/Trousdale County?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Hartsville/Trousdale County, 4.2 kWh per square metre a day. August is the sunniest month (81%) and February the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 65% | 2.2 |
| February | 62% | 2.8 |
| March | 67% | 3.9 |
| April | 74% | 5.2 |
| May | 75% | 5.7 |
| June | 80% | 6.3 |
| July | 80% | 6.1 |
| August | 81% | 5.6 |
| September | 79% | 4.7 |
| October | 75% | 3.6 |
| November | 73% | 2.6 |
| 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 Hartsville/Trousdale County need?
A normal year in Hartsville/Trousdale County brings 3,913 heating degree days, 27% fewer than the median U.S. place (5,373), and 1,344 cooling degree days, 48% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,291 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 864 | 0 |
| February | 679 | 0 |
| March | 523 | 4 |
| April | 249 | 26 |
| May | 74 | 102 |
| June | 6 | 256 |
| July | 0 | 372 |
| August | 1 | 353 |
| September | 26 | 197 |
| October | 221 | 32 |
| November | 505 | 1 |
| December | 764 | 0 |
| Year (annual) | 3,913 | 1,344 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00403938. 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 Hartsville/Trousdale County's climate compare?
Hartsville/Trousdale County is warmer than 40 of the other 115 places with their own NOAA record in Tennessee. Across the 7,247 U.S. stations with normals, its annual mean of 57.9°F is warmer than 69%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Questions about Hartsville/Trousdale County's climate
What is the coldest month in Hartsville/Trousdale County?
January, with a normal high of 48°F and a normal low of 27°F. The warmest is July (88°F by day, 66°F at night).
Does it snow in Hartsville/Trousdale County?
Yes. NOAA publishes no 1991-2020 snowfall normal for Hartsville/Trousdale County's NOAA station; the nearest record that keeps one, Bethpage (10 miles away), records 5 inches of snow in a normal year.
What plant hardiness zone is Hartsville/Trousdale County in?
The USDA's 2023 map puts Hartsville/Trousdale County in zone 7b across its 4 ZIP code areas (7b in 37074, the largest).
How late can frost come in Hartsville/Trousdale County?
In half of years the last 32°F night comes after April 12; in one year in ten it comes after April 29. Waiting until April 29 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Tennessee climateThe statewide normals and every place in the state
- Bethpage, TN10 miles from this station, 56.7°F a year
- Lebanon, TN12 miles from this station, 59.1°F a year
- Lafayette, TN13 miles from this station, 58.4°F a year
- Carthage, TN16 miles from this station, 58.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made