Coalmont, Tennessee climate: Normal weather by month, frost dates and records
Coalmont's normal year runs from 26°F January nights to 83°F July afternoons, with 63.2 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.7°C, January lows of −4°C, July highs of 28°C, 1,605 mm of precipitation a year.
- NOAA stationCoalmont
- Station IDUSC00401887
- Location35.37°N 85.70°W
- Elevation1,856 ft (566 m)
- Population822
On October 23, the normal high in Coalmont is 66°F and the normal low 41°F, and the chance of measurable rain or snow is 32%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Coalmont.
- Jan 45° 26°
- Feb 49° 28°
- Mar 57° 35°
- Apr 66° 42°
- May 74° 52°
- Jun 80° 60°
- Jul 83° 63°
- Aug 83° 62°
- Sep 78° 55°
- Oct 68° 43°
- 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 Coalmont each month?
July is the warmest month, with normal highs of 83°F; January the coldest, with normal lows of 26°F. The most precipitation falls in December (6.38 in), the least in October (3.45 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 45°F | 26°F | 35.4°F | 5.76 | 12 | <1 | 23 | 10 h |
| February | 49°F | 28°F | 38.4°F | 5.54 | 12 | <1 | 19 | 10 h 50 min |
| March | 57°F | 35°F | 46.0°F | 6.13 | 13 | <1 | 13 | 11 h 50 min |
| April | 66°F | 42°F | 54.4°F | 6.15 | 12 | <1 | 5 | 13 h |
| May | 74°F | 52°F | 62.6°F | 5.08 | 13 | <1 | 1 | 14 h |
| June | 80°F | 60°F | 69.8°F | 5.26 | 12 | 1 | <1 | 14 h 30 min |
| July | 83°F | 63°F | 73.2°F | 6.09 | 13 | 2 | <1 | 14 h 20 min |
| August | 83°F | 62°F | 72.2°F | 4.27 | 12 | 4 | <1 | 13 h 30 min |
| September | 78°F | 55°F | 66.6°F | 4.24 | 9 | 1 | <1 | 12 h 30 min |
| October | 68°F | 43°F | 55.8°F | 3.45 | 10 | <1 | 6 | 11 h 20 min |
| November | 57°F | 34°F | 45.8°F | 4.83 | 10 | <1 | 15 | 10 h 20 min |
| December | 48°F | 29°F | 38.4°F | 6.38 | 13 | <1 | 21 | 9 h 50 min |
| Year (annual) | 66°F | 44°F | 54.9°F | 63.18 | 140 | 8 | 103 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 7°C | −4°C | 1.9°C | 146 mm |
| February | 9°C | −2°C | 3.6°C | 141 mm |
| March | 14°C | 1°C | 7.8°C | 156 mm |
| April | 19°C | 6°C | 12.4°C | 156 mm |
| May | 23°C | 11°C | 17.0°C | 129 mm |
| June | 27°C | 15°C | 21.0°C | 134 mm |
| July | 28°C | 17°C | 22.9°C | 155 mm |
| August | 28°C | 16°C | 22.3°C | 108 mm |
| September | 26°C | 13°C | 19.2°C | 108 mm |
| October | 20°C | 6°C | 13.2°C | 88 mm |
| November | 14°C | 1°C | 7.7°C | 123 mm |
| December | 9°C | −2°C | 3.6°C | 162 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Monteagle (13 miles away), gets 5 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00401887; 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 Coalmont?
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 USC00401887.
When is the last frost in Coalmont?
In Coalmont, the last spring frost (32°F) comes after April 21 in half of years and after May 10 in one year in ten; the first autumn frost comes before October 20 in half of years and before October 7 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 211 year in 10 after May 10; 9 in 10 after April 1
- First autumn frost, half of years before
- October 201 year in 10 before October 7; 9 in 10 before November 2
NOAA puts the median frost-free season at 182 days, and the season without a hard freeze (28°F) at 206 days.
A hard freeze (28°F) comes after April 7 in half of springs and before October 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Coalmont in zone 7a in ZIP code 37313. By the map's own method, the average of each year's coldest night over 1991-2020, Coalmont's NOAA station is in zone 7a: the coldest night of a typical year reaches 3°F (21 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 USC00401887; 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 Coalmont?
In a normal year in Coalmont, 8 days a year reach 90°F, 103 nights fall to 32°F or colder and 140 days bring measurable precipitation.
- Days at 90°F or more
- 8a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 103a normal year
- Days that stay below freezing
- 10high of 32°F or less
- Days with 0.01 inch of precipitation
- 140a normal year
The highest temperature in this station's record (since 1999) is 100°F, on June 30, 2012; the lowest is −13°F, on January 18, 2024.
The wettest calendar year on that record is 2020, with 84.21 in; the snowiest season is 2000–01, with 13.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00401887; records: ACIS (NOAA Regional Climate Centers), station USC00401887. Records use complete months only; a month missing more than three days is left out.
How sunny is Coalmont?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Coalmont, 4.3 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 | 66% | 2.3 |
| February | 62% | 2.9 |
| March | 68% | 4.0 |
| April | 74% | 5.3 |
| May | 75% | 5.8 |
| June | 79% | 6.3 |
| July | 78% | 6.0 |
| August | 79% | 5.5 |
| September | 78% | 4.8 |
| October | 76% | 3.7 |
| November | 74% | 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 Coalmont need?
A normal year in Coalmont brings 4,477 heating degree days, 17% fewer than the median U.S. place (5,373), and 818 cooling degree days, 10% fewer than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,486 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 916 | 0 |
| February | 745 | 0 |
| March | 591 | 1 |
| April | 326 | 8 |
| May | 123 | 49 |
| June | 14 | 160 |
| July | 2 | 256 |
| August | 4 | 227 |
| September | 57 | 105 |
| October | 298 | 13 |
| November | 577 | 1 |
| December | 825 | 0 |
| Year (annual) | 4,477 | 818 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00401887. 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 Coalmont been warmer than normal lately?
2025 averaged 56.1°F, 1.2°F above the 1991-2020 normal of 54.9°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 55.5°F | +0.6°F | 68.37 |
| 2023 | 55.9°F | +1.0°F | 61.09 |
| 2024 | 57.4°F | +2.5°F | 64.22 |
| 2025 | 56.1°F | +1.2°F | 64.63 |
Source: observed years: ACIS, station USC00401887. A year counts only with all twelve months complete.
How does Coalmont's climate compare?
Coalmont is warmer than 3 of the other 115 places with their own NOAA record in Tennessee, and wetter than 105. Across the 7,247 U.S. stations with normals, its annual mean of 54.9°F is warmer than 60%.
In the Köppen classification computed from these normals, Coalmont 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 Coalmont share this climate record?
3 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.
- Gruetli-Laager, TN1,789 people · 4 mi E
- Altamont, TN1,189 people · 5 mi NW
- Beersheba Springs, TN455 people · 7 mi N
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 Coalmont's climate
What is the coldest month in Coalmont?
January, with a normal high of 45°F and a normal low of 26°F. The warmest is July (83°F by day, 63°F at night).
Does it snow in Coalmont?
Yes. NOAA publishes no 1991-2020 snowfall normal for Coalmont's NOAA station; the nearest record that keeps one, Monteagle (13 miles away), records 5 inches of snow in a normal year.
What is the rainiest month in Coalmont?
December, with 6.38 in of precipitation in a normal year; the driest is October with 3.45 in.
What plant hardiness zone is Coalmont in?
The USDA's 2023 map puts Coalmont in zone 7a in ZIP code 37313. By the same method at Coalmont's NOAA station, the coldest night of a typical year reaches 3°F (21 years, 1991-2020): zone 7a.
How late can frost come in Coalmont?
In half of years the last 32°F night comes after April 21; in one year in ten it comes after May 10. Waiting until May 10 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Tennessee climateThe statewide normals and every place in the state
- Monteagle, TN12 miles from this station, 55.9°F a year
- Whitwell, TN14 miles from this station, 60.2°F a year
- Sewanee, TN17 miles from this station, 57.4°F a year
- McMinnville, TN22 miles from this station, 60.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made