Hartsville, TN Climate: Temperature by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Hartsville's primary NOAA station, HARTSVILLE.
The climate verdict for Hartsville
Hartsville, Tennessee has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 58°F. July is the warmest month at 77°F and January the coldest at 37°F.
- 58°F
- annual average temperature (NOAA normal)
- 197 days
- frost-free growing season
Hartsville: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00403938 · Hartsville, TN 58°F mean
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-UNK · SWING-MID · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-PART
- TEMP-MILD 58°F
- RANK-UPPER #4,734
- PHOTO-FINISH ≈ Knoxville
- PRCP-UNK Rain n/a
- SWING-MID 40°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 3,913 HDD
- STN-1 USC00403938
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: Knoxville Exp Stn, TN (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every TN station list.
- Hartsville (this station) 58°F
- Cold Muleshoe, TX 58°F
- Hot Waynesboro, TN 58°F
- Near Knoxville, TN 58°F
- Near Danbury, NC 58°F
Climate Living Index · Hartsville
Hartsville: 73/100 · grade B
Hartsville publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Hartsville, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 80 calendar days | 82/100 · B |
| Annual temperature balance | 57.9°F · 9.6° from 67.5°F | 69/100 · C |
| Frost-free season | 197 days/year | 62/100 · C |
Hartsville · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · heating-led station
Where Hartsville sits across the climate record
Available NOAA 1991–2020 fields for Hartsville are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- 69th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Seasonal temperature swing
- 35th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 48°F (9°C) | 27°F (-3°C) | 37°F (3°C) | N/A | 21.8 | 0.0 |
| February | 52°F (11°C) | 30°F (-1°C) | 41°F (5°C) | N/A | 17.8 | 0.0 |
| March | 60°F (16°C) | 36°F (2°C) | 48°F (9°C) | N/A | 9.5 | 0.0 |
| April | 71°F (21°C) | 45°F (7°C) | 58°F (14°C) | N/A | 1.8 | 0.0 |
| May | 78°F (26°C) | 54°F (12°C) | 66°F (19°C) | N/A | 0.1 | 0.4 |
| June | 85°F (29°C) | 62°F (17°C) | 73°F (23°C) | N/A | 0.0 | 6.3 |
| July | 88°F (31°C) | 66°F (19°C) | 77°F (25°C) | N/A | 0.0 | 13.4 |
| August | 88°F (31°C) | 65°F (18°C) | 76°F (25°C) | N/A | 0.0 | 15.8 |
| September | 83°F (28°C) | 59°F (15°C) | 71°F (22°C) | N/A | 0.0 | 5.3 |
| October | 72°F (22°C) | 46°F (8°C) | 59°F (15°C) | N/A | 2.1 | 0.3 |
| November | 60°F (16°C) | 36°F (2°C) | 48°F (9°C) | N/A | 9.4 | 0.0 |
| December | 50°F (10°C) | 31°F (-1°C) | 40°F (5°C) | N/A | 18.9 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 89°F around August 1, short of 90°F on every date, while 80 dates carry a normal low at or below freezing, the coldest 26°F near January 17.
The freezing stretch
The normal low stays at or below 32°F into February 25, then returns to freezing around December 8, covering 80 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
The widest day
October 25 carries the biggest normal gap between afternoon and dawn, 27°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Hartsville.
Monthly Precipitation
Average monthly rainfall
Frost Dates & Growing Season
First Fall Freeze
October 26
50% probability date
Last Spring Freeze
April 12
50% probability date
Growing Season
197 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,913
Higher = more heating needed
Cooling Degree Days
1,344
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside TN closest to Hartsville on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (58°F here).
- Albuquerque, NM 58°F · 0.0°F off
- Buffalo, OK 58°F · 0.0°F off
- Lenoir, NC 58°F · 0.0°F off
- Marion, NC 58°F · 0.0°F off
Data-derived climate profile
How Hartsville's climate pattern fits together
heating led · mid swing
Hartsville's energy balance leans toward cold weather: 3,913 annual heating degree days against 1,344 for cooling. Its 39.9°F seasonal range still makes the monthly rows more useful than the annual average alone.
Hartsville's frost-free season lasts about 197 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Hartsville's middle-range seasonal profile. The measured spread is 39.9°F. The annual average is 58°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
A moisture-range label is withheld because Hartsville's annual precipitation total is unavailable. Monthly source values remain visible where NOAA provides them, and no annual amount is reconstructed from incomplete data.
These labels group NOAA 1991-2020 normals from Hartsville's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Hartsville, not an official NOAA class or a year-ahead forecast.
Questions about Hartsville's climate
How many days above 90°F does Hartsville get? ▼
How much energy does heating and cooling require in Hartsville? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Hartsville's primary station: HARTSVILLE (USC00403938). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Hartsville; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Hartsville comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.