Winchester, Tennessee climate: Normal weather by month, frost dates and records
Winchester's normal year runs from 30°F January nights to 87°F July afternoons, with 57.7 inches of precipitation and 4 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.1°C, January lows of −1°C, July highs of 31°C, 1,465 mm of precipitation a year.
- NOAA stationWinchester (5 mi SE)
- Station IDUSC00409800
- Location35.16°N 86.03°W
- Elevation941 ft (287 m)
- From the center5 miles
- Population10,251
On October 24, the normal high in Winchester is 69°F and the normal low 45°F, and the chance of measurable rain or snow is 27%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Winchester.
- Jan 49° 30°
- Feb 53° 33°
- Mar 61° 40°
- Apr 71° 47°
- May 78° 56°
- Jun 85° 64°
- Jul 87° 68°
- Aug 87° 66°
- Sep 82° 60°
- Oct 72° 49°
- Nov 61° 38°
- Dec 52° 33°
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 Winchester each month?
July is the warmest month, with normal highs of 87°F; January the coldest, with normal lows of 30°F. The most precipitation falls in March (5.76 in), the least in October (3.43 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 49°F | 30°F | 39.5°F | 4.78 | 1.4 | 12 | <1 | 18 | 10 h |
| February | 53°F | 33°F | 43.1°F | 5.40 | 1.0 | 12 | <1 | 15 | 10 h 50 min |
| March | 61°F | 40°F | 50.5°F | 5.76 | 1.0 | 12 | <1 | 9 | 11 h 50 min |
| April | 71°F | 47°F | 59.1°F | 5.06 | 0.0 | 11 | <1 | 2 | 13 h |
| May | 78°F | 56°F | 67.1°F | 4.77 | 0.0 | 11 | 1 | <1 | 14 h |
| June | 85°F | 64°F | 74.4°F | 5.20 | 0.0 | 12 | 5 | <1 | 14 h 30 min |
| July | 87°F | 68°F | 77.6°F | 4.68 | 0.0 | 11 | 12 | <1 | 14 h 20 min |
| August | 87°F | 66°F | 76.8°F | 3.91 | 0.0 | 10 | 11 | <1 | 13 h 30 min |
| September | 82°F | 60°F | 71.0°F | 4.27 | 0.0 | 8 | 5 | <1 | 12 h 30 min |
| October | 72°F | 49°F | 60.2°F | 3.43 | 0.0 | 8 | <1 | 2 | 11 h 20 min |
| November | 61°F | 38°F | 49.2°F | 4.66 | 0.0 | 9 | <1 | 10 | 10 h 20 min |
| December | 52°F | 33°F | 42.4°F | 5.75 | 0.7 | 12 | <1 | 16 | 9 h 50 min |
| Year (annual) | 70°F | 49°F | 59.2°F | 57.67 | 4.1 | 128 | 33 | 71 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 9°C | −1°C | 4.2°C | 121 mm | 4 cm |
| February | 12°C | 1°C | 6.2°C | 137 mm | 3 cm |
| March | 16°C | 4°C | 10.3°C | 146 mm | 3 cm |
| April | 22°C | 9°C | 15.1°C | 129 mm | 0 cm |
| May | 26°C | 13°C | 19.5°C | 121 mm | 0 cm |
| June | 29°C | 18°C | 23.6°C | 132 mm | 0 cm |
| July | 31°C | 20°C | 25.3°C | 119 mm | 0 cm |
| August | 31°C | 19°C | 24.9°C | 99 mm | 0 cm |
| September | 28°C | 16°C | 21.7°C | 108 mm | 0 cm |
| October | 22°C | 9°C | 15.7°C | 87 mm | 0 cm |
| November | 16°C | 3°C | 9.6°C | 118 mm | 0 cm |
| December | 11°C | 1°C | 5.8°C | 146 mm | 2 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00409800; 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 Winchester?
Normal highs sit between 65°F and 85°F in April, May, June, 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 USC00409800.
When is the last frost in Winchester?
In Winchester, the last spring frost (32°F) comes after April 6 in half of years and after April 25 in one year in ten; the first autumn frost comes before October 29 in half of years and before October 16 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 61 year in 10 after April 25; 9 in 10 after March 19
- First autumn frost, half of years before
- October 291 year in 10 before October 16; 9 in 10 before November 11
NOAA puts the median frost-free season at 204 days, and the season without a hard freeze (28°F) at 229 days.
A hard freeze (28°F) comes after March 26 in half of springs and before November 6 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Winchester in zone 7b in ZIP code 37398, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Winchester's NOAA station is in zone 7b: the coldest night of a typical year reaches 9°F (23 complete years).
Frost dates for every NOAA station in Tennessee · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00409800; 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 Winchester?
In a normal year in Winchester, 33 days a year reach 90°F (1 of them 100°F or more), 71 nights fall to 32°F or colder and 128 days bring measurable precipitation.
- Days at 90°F or more
- 33a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 71a normal year
- Days that stay below freezing
- 5high of 32°F or less
- Days with 0.01 inch of precipitation
- 128a normal year
- Days with 1 inch of snow or more
- 2a normal year
The highest temperature in this station's record (since 1985) is 105°F, on July 1, 2012; the lowest is −5°F, on December 23, 1989.
The wettest calendar year on that record is 2020, with 77.79 in; the snowiest season is 1995–96, with 12.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00409800; records: ACIS (NOAA Regional Climate Centers), station USC00409800. Records use complete months only; a month missing more than three days is left out.
How sunny is Winchester?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Winchester, 4.3 kWh per square metre a day. June is the sunniest month (80%) and February the cloudiest (63%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 66% | 2.3 |
| February | 63% | 2.9 |
| March | 68% | 4.0 |
| April | 75% | 5.3 |
| May | 76% | 5.9 |
| June | 80% | 6.4 |
| July | 79% | 6.1 |
| August | 80% | 5.5 |
| September | 79% | 4.8 |
| October | 76% | 3.7 |
| November | 75% | 2.8 |
| December | 65% | 2.0 |
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 Winchester need?
A normal year in Winchester brings 3,520 heating degree days, 34% fewer than the median U.S. place (5,373), and 1,454 cooling degree days, 60% 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 4,548 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 789 | 0 |
| February | 614 | 0 |
| March | 453 | 5 |
| April | 209 | 32 |
| May | 61 | 126 |
| June | 3 | 283 |
| July | 0 | 391 |
| August | 0 | 365 |
| September | 22 | 202 |
| October | 193 | 45 |
| November | 476 | 4 |
| December | 700 | 1 |
| Year (annual) | 3,520 | 1,454 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00409800. 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 Winchester been warmer than normal lately?
2022 averaged 60.3°F, 1.1°F above the 1991-2020 normal of 59.2°F. 2 of the 2 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 60.7°F | +1.5°F | 73.39 | – |
| 2022 | 60.3°F | +1.1°F | – | – |
Source: observed years: ACIS, station USC00409800. A year counts only with all twelve months complete.
How does Winchester's climate compare?
Winchester is warmer than 82 of the other 115 places with their own NOAA record in Tennessee, and wetter than 77. Across the 7,247 U.S. stations with normals, its annual mean of 59.2°F is warmer than 72%.
In the Köppen classification computed from these normals, Winchester 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 Winchester 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.
- Decherd, TN2,479 people · 4 mi NW
- Cowan, TN1,816 people · 1 mi E
- Huntland, TN890 people · 15 mi SW
- Hytop, AL453 people · 19 mi S
- Belvidere, TN90 people · 9 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 Winchester's climate
What is the coldest month in Winchester?
January, with a normal high of 49°F and a normal low of 30°F. The warmest is July (87°F by day, 68°F at night).
Does it snow in Winchester?
Yes: 4 inches in a normal year, falling on 4 days with 0.1 inch or more, the most in January (1.4 inches).
What is the rainiest month in Winchester?
March, with 5.76 in of precipitation in a normal year; the driest is October with 3.43 in.
What plant hardiness zone is Winchester in?
The USDA's 2023 map puts Winchester in zone 7b in ZIP code 37398, the nearest ZIP area. By the same method at Winchester's NOAA station, the coldest night of a typical year reaches 9°F (23 years, 1991-2020): zone 7b.
How late can frost come in Winchester?
In half of years the last 32°F night comes after April 6; in one year in ten it comes after April 25. Waiting until April 25 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Tennessee climateThe statewide normals and every place in the state
- Sewanee, TN7 miles from this station, 57.4°F a year
- Monteagle, TN12 miles from this station, 55.9°F a year
- Tullahoma, TN16 miles from this station, 58.7°F a year
- Bridgeport, AL18 miles from this station, 58.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made