Norris, Tennessee climate: Normal weather by month, frost dates and records
Norris's normal year runs from 25°F January nights to 85°F July afternoons, with 57.7 inches of precipitation and 3 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.1°C, January lows of −4°C, July highs of 30°C, 1,465 mm of precipitation a year.
- NOAA stationNorris
- Station IDUSC00406619
- Location36.21°N 84.06°W
- Elevation1,110 ft (338 m)
- From the centerunder 1 mile
- Population1,623
On October 22, the normal high in Norris is 67°F and the normal low 41°F, and the chance of measurable rain or snow is 29%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Norris.
- Jan 44° 25°
- Feb 50° 28°
- Mar 60° 33°
- Apr 70° 41°
- May 77° 51°
- Jun 83° 59°
- Jul 85° 63°
- Aug 85° 63°
- Sep 80° 56°
- Oct 70° 44°
- Nov 57° 34°
- Dec 48° 29°
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 Norris each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 25°F. The most precipitation falls in April (5.75 in), the least in October (3.37 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 44°F | 25°F | 34.8°F | 5.11 | 1.1 | 12 | <1 | 23 | 10 h |
| February | 50°F | 28°F | 38.8°F | 5.35 | 1.5 | 12 | <1 | 20 | 10 h 50 min |
| March | 60°F | 33°F | 46.5°F | 5.48 | 0.1 | 13 | <1 | 15 | 11 h 50 min |
| April | 70°F | 41°F | 55.6°F | 5.75 | 0.0 | 11 | <1 | 5 | 13 h |
| May | 77°F | 51°F | 64.0°F | 4.31 | 0.0 | 12 | <1 | <1 | 14 h |
| June | 83°F | 59°F | 71.1°F | 4.87 | 0.0 | 13 | 3 | <1 | 14 h 40 min |
| July | 85°F | 63°F | 74.2°F | 5.38 | 0.0 | 13 | 6 | <1 | 14 h 20 min |
| August | 85°F | 63°F | 73.5°F | 4.27 | 0.0 | 10 | 5 | <1 | 13 h 30 min |
| September | 80°F | 56°F | 68.0°F | 4.06 | 0.0 | 8 | 2 | <1 | 12 h 30 min |
| October | 70°F | 44°F | 56.6°F | 3.37 | 0.0 | 8 | <1 | 3 | 11 h 20 min |
| November | 57°F | 34°F | 45.6°F | 4.03 | 0.0 | 9 | <1 | 14 | 10 h 20 min |
| December | 48°F | 29°F | 38.1°F | 5.69 | 0.4 | 12 | <1 | 21 | 9 h 40 min |
| Year (annual) | 67°F | 44°F | 55.6°F | 57.67 | 3.1 | 134 | 17 | 101 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 7°C | −4°C | 1.6°C | 130 mm | 3 cm |
| February | 10°C | −2°C | 3.8°C | 136 mm | 4 cm |
| March | 15°C | 1°C | 8.1°C | 139 mm | 0 cm |
| April | 21°C | 5°C | 13.1°C | 146 mm | 0 cm |
| May | 25°C | 11°C | 17.8°C | 109 mm | 0 cm |
| June | 28°C | 15°C | 21.7°C | 124 mm | 0 cm |
| July | 30°C | 17°C | 23.4°C | 137 mm | 0 cm |
| August | 29°C | 17°C | 23.1°C | 108 mm | 0 cm |
| September | 27°C | 13°C | 20.0°C | 103 mm | 0 cm |
| October | 21°C | 7°C | 13.7°C | 86 mm | 0 cm |
| November | 14°C | 1°C | 7.6°C | 102 mm | 0 cm |
| December | 9°C | −2°C | 3.4°C | 145 mm | 1 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00406619; 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 Norris?
Normal highs sit between 65°F and 85°F in April, May, June, August, 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 USC00406619.
When is the last frost in Norris?
In Norris, the last spring frost (32°F) comes after April 22 in half of years and after May 9 in one year in ten; the first autumn frost comes before October 25 in half of years and before October 11 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 221 year in 10 after May 9; 9 in 10 after April 6
- First autumn frost, half of years before
- October 251 year in 10 before October 11; 9 in 10 before November 6
NOAA puts the median frost-free season at 184 days, and the season without a hard freeze (28°F) at 207 days.
A hard freeze (28°F) comes after April 7 in half of springs and before November 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Norris in zone 7b across its 2 ZIP code areas (7b in 37705, the largest). By the map's own method, the average of each year's coldest night over 1991-2020, Norris's NOAA station is in zone 7b: the coldest night of a typical year reaches 6°F (29 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 USC00406619; 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.
What hardiness zone is each Norris ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Norris'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 Norris?
In a normal year in Norris, 17 days a year reach 90°F, 101 nights fall to 32°F or colder and 134 days bring measurable precipitation.
- Days at 90°F or more
- 17a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 101a normal year
- Days that stay below freezing
- 7high of 32°F or less
- Days with 0.01 inch of precipitation
- 134a normal year
- Days with 1 inch of snow or more
- 1a normal year
The highest temperature in this station's record (since 1935) is 105°F, on July 25, 1964; the lowest is −19°F, on January 20, 1985.
The wettest calendar year on that record is 1994, with 72.23 in; the snowiest season is 1969–70, with 21.7 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00406619; records: ACIS (NOAA Regional Climate Centers), station USC00406619. Records use complete months only; a month missing more than three days is left out.
How sunny is Norris?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Norris, 4.2 kWh per square metre a day. August is the sunniest month (79%) and February the cloudiest (61%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 63% | 2.2 |
| February | 61% | 2.8 |
| March | 66% | 3.9 |
| April | 72% | 5.2 |
| May | 73% | 5.7 |
| June | 78% | 6.2 |
| July | 76% | 5.9 |
| August | 79% | 5.5 |
| September | 77% | 4.7 |
| October | 74% | 3.6 |
| November | 73% | 2.6 |
| December | 63% | 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 Norris need?
A normal year in Norris brings 4,385 heating degree days, 18% fewer than the median U.S. place (5,373), and 974 cooling degree days, 7% 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 3,691 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 936 | 0 |
| February | 734 | 0 |
| March | 576 | 1 |
| April | 294 | 12 |
| May | 103 | 71 |
| June | 10 | 192 |
| July | 1 | 288 |
| August | 1 | 264 |
| September | 39 | 131 |
| October | 275 | 16 |
| November | 582 | 0 |
| December | 834 | 0 |
| Year (annual) | 4,385 | 974 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00406619. 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 Norris been warmer than normal lately?
2025 averaged 56.6°F, 1.0°F above the 1991-2020 normal of 55.6°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 56.0°F | +0.4°F | 56.63 | 0.4 |
| 2022 | 55.4°F | −0.2°F | 59.32 | 9.2 |
| 2023 | 56.8°F | +1.2°F | 46.52 | 0.0 |
| 2024 | 57.2°F | +1.6°F | 51.68 | 7.0 |
| 2025 | 56.6°F | +1.0°F | 51.86 | 0.4 |
Over 48 complete years from 1955 to 2025, the station's annual mean temperature rose at a fitted 1.8°F per century (+0.10°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00406619; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Norris's climate compare?
Norris is warmer than 11 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 55.6°F is warmer than 62%.
In the Köppen classification computed from these normals, Norris 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 Norris share this climate record?
9 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.
- Halls, TN9,455 people · 11 mi SE
- La Follette, TN7,194 people · 12 mi N
- Maynardville, TN2,598 people · 14 mi E
- Jacksboro, TN2,248 people · 11 mi NW
- Plainview, TN2,226 people · 15 mi E
- Caryville, TN2,207 people · 10 mi NW
- Rocky Top, TN1,664 people · 5 mi W
- Andersonville, TN294 people · 2 mi SE
- Briceville, TN209 people · 7 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 Norris's climate
What is the coldest month in Norris?
January, with a normal high of 44°F and a normal low of 25°F. The warmest is July (85°F by day, 63°F at night).
Does it snow in Norris?
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 Norris?
April, with 5.75 in of precipitation in a normal year; the driest is October with 3.37 in.
What plant hardiness zone is Norris in?
The USDA's 2023 map puts Norris in zone 7b across its 2 ZIP code areas (7b in 37705, the largest). By the same method at Norris's NOAA station, the coldest night of a typical year reaches 6°F (29 years, 1991-2020): zone 7b.
How late can frost come in Norris?
In half of years the last 32°F night comes after April 22; in one year in ten it comes after May 9. Waiting until May 9 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Tennessee climateThe statewide normals and every place in the state
- Oak Ridge, TN16 miles from this station, 59.8°F a year
- Oak Ridge Atdd, TN18 miles from this station, 58.6°F a year
- Knoxville Experiment Station, TN22 miles from this station, 57.9°F a year
- Newcomb, TN24 miles from this station, 56.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made