Morristown, Tennessee climate: Normal weather by month, frost dates and records
Morristown's normal year runs from 27°F January nights to 86°F July afternoons, with 48.1 inches of precipitation and 9 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.1°C, January lows of −3°C, July highs of 30°C, 1,223 mm of precipitation a year.
- NOAA stationMorristown Radio WCRK
- Station IDUSC00406271
- Location36.21°N 83.33°W
- Elevation1,344 ft (410 m)
- Population32,994
On October 22, the normal high in Morristown is 68°F and the normal low 44°F, and the chance of measurable rain or snow is 30%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Morristown.
- Jan 46° 27°
- Feb 51° 30°
- Mar 60° 36°
- Apr 69° 45°
- May 77° 55°
- Jun 83° 63°
- Jul 86° 67°
- Aug 86° 65°
- Sep 81° 59°
- Oct 70° 47°
- Nov 59° 36°
- Dec 49° 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 Morristown each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 27°F. The most precipitation falls in March (4.88 in), the least in October (2.76 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 46°F | 27°F | 36.6°F | 4.05 | 2.1 | 12 | <1 | 21 | 10 h |
| February | 51°F | 30°F | 40.4°F | 4.49 | 2.9 | 13 | <1 | 17 | 10 h 50 min |
| March | 60°F | 36°F | 48.0°F | 4.88 | 2.0 | 13 | <1 | 11 | 11 h 50 min |
| April | 69°F | 45°F | 57.0°F | 4.44 | 0.0 | 11 | <1 | 3 | 13 h |
| May | 77°F | 55°F | 65.7°F | 3.75 | 0.0 | 12 | <1 | <1 | 14 h |
| June | 83°F | 63°F | 73.1°F | 4.53 | 0.0 | 12 | 4 | <1 | 14 h 40 min |
| July | 86°F | 67°F | 76.6°F | 4.73 | 0.0 | 13 | 8 | <1 | 14 h 20 min |
| August | 86°F | 65°F | 75.4°F | 3.33 | 0.0 | 10 | 7 | <1 | 13 h 30 min |
| September | 81°F | 59°F | 69.6°F | 3.24 | 0.0 | 9 | 3 | <1 | 12 h 30 min |
| October | 70°F | 47°F | 58.5°F | 2.76 | 0.0 | 9 | <1 | 2 | 11 h 20 min |
| November | 59°F | 36°F | 47.1°F | 3.37 | 0.2 | 9 | <1 | 12 | 10 h 20 min |
| December | 49°F | 31°F | 39.9°F | 4.57 | 1.6 | 12 | <1 | 18 | 9 h 40 min |
| Year (annual) | 68°F | 47°F | 57.3°F | 48.14 | 8.8 | 136 | 22 | 84 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 8°C | −3°C | 2.6°C | 103 mm | 5 cm |
| February | 10°C | −1°C | 4.7°C | 114 mm | 7 cm |
| March | 15°C | 2°C | 8.9°C | 124 mm | 5 cm |
| April | 21°C | 7°C | 13.9°C | 113 mm | 0 cm |
| May | 25°C | 13°C | 18.7°C | 95 mm | 0 cm |
| June | 29°C | 17°C | 22.8°C | 115 mm | 0 cm |
| July | 30°C | 19°C | 24.8°C | 120 mm | 0 cm |
| August | 30°C | 18°C | 24.1°C | 85 mm | 0 cm |
| September | 27°C | 15°C | 20.9°C | 82 mm | 0 cm |
| October | 21°C | 8°C | 14.7°C | 70 mm | 0 cm |
| November | 15°C | 2°C | 8.4°C | 86 mm | 1 cm |
| December | 9°C | −1°C | 4.4°C | 116 mm | 4 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00406271; 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 Morristown?
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 (9).
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 USC00406271.
When is the last frost in Morristown?
In Morristown, the last spring frost (32°F) comes after April 10 in half of years and after April 26 in one year in ten; the first autumn frost comes before October 28 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 101 year in 10 after April 26; 9 in 10 after March 25
- First autumn frost, half of years before
- October 281 year in 10 before October 16; 9 in 10 before November 9
NOAA puts the median frost-free season at 201 days, and the season without a hard freeze (28°F) at 224 days.
A hard freeze (28°F) comes after March 29 in half of springs and before November 6 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Morristown in zone 7b across its 2 ZIP code areas (7b in 37814, 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 USC00406271; 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 Morristown ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Morristown's 2 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 Morristown?
In a normal year in Morristown, 22 days a year reach 90°F, 84 nights fall to 32°F or colder and 136 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
- 84a normal year
- Days that stay below freezing
- 6high of 32°F or less
- Days with 0.01 inch of precipitation
- 136a normal year
- Days with 1 inch of snow or more
- 3a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00406271.
How sunny is Morristown?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Morristown, 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 Morristown need?
A normal year in Morristown brings 4,017 heating degree days, 25% fewer than the median U.S. place (5,373), and 1,252 cooling degree days, 38% 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 4,129 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 879 | 0 |
| February | 688 | 0 |
| March | 530 | 2 |
| April | 261 | 19 |
| May | 80 | 100 |
| June | 6 | 250 |
| July | 0 | 361 |
| August | 0 | 323 |
| September | 28 | 166 |
| October | 231 | 28 |
| November | 537 | 2 |
| December | 777 | 0 |
| Year (annual) | 4,017 | 1,252 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00406271. 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 Morristown's climate compare?
Morristown is warmer than 26 of the other 115 places with their own NOAA record in Tennessee, and wetter than 8. Across the 7,247 U.S. stations with normals, its annual mean of 57.3°F is warmer than 67%.
In the Köppen classification computed from these normals, Morristown 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 Morristown share this climate record?
4 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.
- Bean Station, TN3,111 people · 9 mi N
- White Pine, TN2,584 people · 8 mi S
- Mooresburg, TN829 people · 11 mi NE
- Russellville, TN719 people · 8 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Morristown's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Morristown. This page uses Morristown Radio WCRK; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Morristown Weather Office USC00406272 | 5 mi SW | 1,320 ft | 58.2°F | 29°F | 86°F | 47.4 | 10 | March 31 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Morristown's climate
What is the coldest month in Morristown?
January, with a normal high of 46°F and a normal low of 27°F. The warmest is July (86°F by day, 67°F at night).
Does it snow in Morristown?
Yes: 9 inches in a normal year, falling on 6 days with 0.1 inch or more, the most in February (2.9 inches).
What is the rainiest month in Morristown?
March, with 4.88 in of precipitation in a normal year; the driest is October with 2.76 in.
What plant hardiness zone is Morristown in?
The USDA's 2023 map puts Morristown in zone 7b across its 2 ZIP code areas (7b in 37814, the largest).
How late can frost come in Morristown?
In half of years the last 32°F night comes after April 10; in one year in ten it comes after April 26. Waiting until April 26 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Morristown in OctoberThis month day by day, its records and recent years
- Tennessee climateThe statewide normals and every place in the state
- Jefferson City, TN10 miles from this station, 55.9°F a year
- Newport, TN17 miles from this station, 58.7°F a year
- Tazewell, TN22 miles from this station, 54.2°F a year
- Rogersville, TN24 miles from this station, 56.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made