Allardt, Tennessee climate: Normal weather by month, frost dates and records
Allardt's normal year runs from 27°F January nights to 83°F July afternoons, with 59.8 inches of precipitation and 13 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.1°C, January lows of −3°C, July highs of 28°C, 1,519 mm of precipitation a year.
- NOAA stationAllardt
- Station IDUSC00400081
- Location36.38°N 84.87°W
- Elevation1,645 ft (501 m)
- Population602
On October 23, the normal high in Allardt is 66°F and the normal low 43°F, and the chance of measurable rain or snow is 31%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Allardt.
- Jan 44° 27°
- Feb 49° 30°
- Mar 57° 36°
- Apr 67° 45°
- May 73° 53°
- Jun 80° 60°
- Jul 83° 65°
- Aug 82° 63°
- Sep 78° 57°
- Oct 68° 46°
- Nov 56° 36°
- Dec 47° 30°
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 Allardt each month?
July is the warmest month, with normal highs of 83°F; January the coldest, with normal lows of 27°F. The most precipitation falls in March (5.75 in), the least in October (3.17 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 44°F | 27°F | 35.8°F | 4.94 | 4.0 | 13 | <1 | 21 | 10 h |
| February | 49°F | 30°F | 39.4°F | 5.03 | 3.8 | 12 | <1 | 18 | 10 h 50 min |
| March | 57°F | 36°F | 46.7°F | 5.75 | 2.4 | 13 | <1 | 12 | 11 h 50 min |
| April | 67°F | 45°F | 56.0°F | 5.36 | 0.4 | 12 | <1 | 4 | 13 h 10 min |
| May | 73°F | 53°F | 63.1°F | 5.22 | 0.0 | 13 | <1 | 1 | 14 h |
| June | 80°F | 60°F | 70.1°F | 5.56 | 0.0 | 13 | 1 | <1 | 14 h 40 min |
| July | 83°F | 65°F | 73.5°F | 5.70 | 0.0 | 13 | 2 | <1 | 14 h 30 min |
| August | 82°F | 63°F | 72.6°F | 4.66 | 0.0 | 11 | 2 | <1 | 13 h 40 min |
| September | 78°F | 57°F | 67.1°F | 4.03 | 0.0 | 9 | 1 | <1 | 12 h 30 min |
| October | 68°F | 46°F | 56.9°F | 3.17 | 0.1 | 9 | <1 | 3 | 11 h 20 min |
| November | 56°F | 36°F | 46.2°F | 4.69 | 0.1 | 10 | <1 | 12 | 10 h 20 min |
| December | 47°F | 30°F | 38.8°F | 5.71 | 2.4 | 14 | <1 | 19 | 9 h 40 min |
| Year (annual) | 65°F | 46°F | 55.5°F | 59.82 | 13.2 | 142 | 6 | 90 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 7°C | −3°C | 2.1°C | 125 mm | 10 cm |
| February | 9°C | −1°C | 4.1°C | 128 mm | 10 cm |
| March | 14°C | 2°C | 8.2°C | 146 mm | 6 cm |
| April | 20°C | 7°C | 13.3°C | 136 mm | 1 cm |
| May | 23°C | 12°C | 17.3°C | 133 mm | 0 cm |
| June | 27°C | 16°C | 21.2°C | 141 mm | 0 cm |
| July | 28°C | 18°C | 23.1°C | 145 mm | 0 cm |
| August | 28°C | 17°C | 22.6°C | 118 mm | 0 cm |
| September | 25°C | 14°C | 19.5°C | 102 mm | 0 cm |
| October | 20°C | 8°C | 13.8°C | 81 mm | 0 cm |
| November | 13°C | 2°C | 7.9°C | 119 mm | 0 cm |
| December | 9°C | −1°C | 3.8°C | 145 mm | 6 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00400081; 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 Allardt?
Normal highs sit between 65°F and 85°F in April, May, June, July, August, 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 USC00400081.
When is the last frost in Allardt?
In Allardt, the last spring frost (32°F) comes after April 17 in half of years and after May 7 in one year in ten; the first autumn frost comes before October 23 in half of years and before October 9 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 171 year in 10 after May 7; 9 in 10 after April 1
- First autumn frost, half of years before
- October 231 year in 10 before October 9; 9 in 10 before November 4
NOAA puts the median frost-free season at 188 days, and the season without a hard freeze (28°F) at 213 days.
A hard freeze (28°F) comes after April 2 in half of springs and before November 2 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Allardt in zone 7a in ZIP code 38556, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Allardt's NOAA station is in zone 7a: the coldest night of a typical year reaches 3°F (25 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 USC00400081; 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 Allardt?
In a normal year in Allardt, 6 days a year reach 90°F, 90 nights fall to 32°F or colder and 142 days bring measurable precipitation.
- Days at 90°F or more
- 6a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 90a normal year
- Days that stay below freezing
- 12high of 32°F or less
- Days with 0.01 inch of precipitation
- 142a normal year
- Days with 1 inch of snow or more
- 5a normal year
The highest temperature in this station's record (since 1928) is 104°F, on June 29, 1936; the lowest is −27°F, on January 21, 1985.
The wettest calendar year on that record is 2011, with 78.77 in; the snowiest season is 1935–36, with 47.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00400081; records: ACIS (NOAA Regional Climate Centers), station USC00400081. Records use complete months only; a month missing more than three days is left out.
How sunny is Allardt?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Allardt, 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 Allardt need?
A normal year in Allardt brings 4,327 heating degree days, 19% fewer than the median U.S. place (5,373), and 892 cooling degree days, 2% fewer 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 3,645 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 907 | 0 |
| February | 717 | 0 |
| March | 570 | 2 |
| April | 286 | 16 |
| May | 120 | 61 |
| June | 17 | 170 |
| July | 2 | 265 |
| August | 5 | 240 |
| September | 53 | 116 |
| October | 272 | 19 |
| November | 565 | 1 |
| December | 814 | 0 |
| Year (annual) | 4,327 | 892 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00400081. 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 Allardt been warmer than normal lately?
Over 62 complete years from 1928 to 2020, the station's annual mean temperature rose at a fitted 1.5°F per century (+0.09°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Allardt's climate compare?
Allardt is warmer than 10 of the other 115 places with their own NOAA record in Tennessee, and wetter than 94. Across the 7,247 U.S. stations with normals, its annual mean of 55.5°F is warmer than 62%.
In the Köppen classification computed from these normals, Allardt 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 Allardt share this climate record?
Grimsley has no NOAA station with 1991-2020 normals of its 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.
- Grimsley, TN940 people · 10 mi SW
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 Allardt's climate
What is the coldest month in Allardt?
January, with a normal high of 44°F and a normal low of 27°F. The warmest is July (83°F by day, 65°F at night).
Does it snow in Allardt?
Yes: 13 inches in a normal year, falling on 8 days with 0.1 inch or more, the most in January (4.0 inches).
What is the rainiest month in Allardt?
March, with 5.75 in of precipitation in a normal year; the driest is October with 3.17 in.
What plant hardiness zone is Allardt in?
The USDA's 2023 map puts Allardt in zone 7a in ZIP code 38556, the nearest ZIP area. By the same method at Allardt's NOAA station, the coldest night of a typical year reaches 3°F (25 years, 1991-2020): zone 7a.
How late can frost come in Allardt?
In half of years the last 32°F night comes after April 17; in one year in ten it comes after May 7. Waiting until May 7 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Tennessee climateThe statewide normals and every place in the state
- Jamestown, TN5 miles from this station, 55.2°F a year
- Pickett State Park, TN12 miles from this station, 54.3°F a year
- Lancing (6 mi NW), TN18 miles from this station, 55.8°F a year
- Byrdstown, TN20 miles from this station, 56.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made