Smyrna, Tennessee climate: Normal weather by month, frost dates and records
Smyrna's normal year runs from 26°F January nights to 90°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.4°C, January lows of −3°C, July highs of 32°C.
- NOAA stationSmyrna (6 mi S)
- Station IDUSC00408414
- Location35.91°N 86.56°W
- Elevation550 ft (168 m)
- From the center4 miles
- Population60,302
On October 22, the normal high in Smyrna is 71°F and the normal low 41°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Smyrna.
- Jan 48° 26°
- Feb 52° 29°
- Mar 61° 35°
- Apr 71° 44°
- May 79° 53°
- Jun 86° 61°
- Jul 90° 66°
- Aug 90° 64°
- Sep 85° 56°
- Oct 73° 44°
- Nov 61° 33°
- Dec 52° 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 Smyrna each month?
July is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 26°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 48°F | 26°F | 37.3°F | – | <1 | 23 | 10 h |
| February | 52°F | 29°F | 40.5°F | – | <1 | 19 | 10 h 50 min |
| March | 61°F | 35°F | 48.2°F | – | <1 | 14 | 11 h 50 min |
| April | 71°F | 44°F | 57.5°F | – | <1 | 3 | 13 h |
| May | 79°F | 53°F | 65.9°F | – | 1 | <1 | 14 h |
| June | 86°F | 61°F | 73.8°F | – | 11 | <1 | 14 h 40 min |
| July | 90°F | 66°F | 77.7°F | – | 17 | <1 | 14 h 20 min |
| August | 90°F | 64°F | 77.0°F | – | 19 | <1 | 13 h 30 min |
| September | 85°F | 56°F | 70.5°F | – | 7 | <1 | 12 h 30 min |
| October | 73°F | 44°F | 58.6°F | – | <1 | 5 | 11 h 20 min |
| November | 61°F | 33°F | 47.1°F | – | <1 | 15 | 10 h 20 min |
| December | 52°F | 30°F | 40.5°F | – | <1 | 22 | 9 h 40 min |
| Year (annual) | 71°F | 45°F | 57.9°F | – | 57 | 102 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 9°C | −3°C | 2.9°C |
| February | 11°C | −2°C | 4.7°C |
| March | 16°C | 2°C | 9.0°C |
| April | 22°C | 7°C | 14.2°C |
| May | 26°C | 12°C | 18.8°C |
| June | 30°C | 16°C | 23.2°C |
| July | 32°C | 19°C | 25.4°C |
| August | 32°C | 18°C | 25.0°C |
| September | 29°C | 14°C | 21.4°C |
| October | 23°C | 7°C | 14.8°C |
| November | 16°C | 1°C | 8.4°C |
| December | 11°C | −1°C | 4.7°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Murfreesboro (10 miles away), gets 2 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00408414; 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 Smyrna?
Normal highs sit between 65°F and 85°F in April, May, September and October.
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 USC00408414.
When is the last frost in Smyrna?
In Smyrna, the last spring frost (32°F) comes after April 13 in half of years and after May 4 in one year in ten; the first autumn frost comes before October 21 in half of years and before October 8 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 131 year in 10 after May 4; 9 in 10 after March 31
- First autumn frost, half of years before
- October 211 year in 10 before October 8; 9 in 10 before November 2
NOAA puts the median frost-free season at 189 days, and the season without a hard freeze (28°F) at 210 days.
A hard freeze (28°F) comes after April 1 in half of springs and before October 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Smyrna in zone 7b in ZIP code 37167.
Frost dates for every NOAA station in Tennessee · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00408414; 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.
How hot and how cold does it get in Smyrna?
In a normal year in Smyrna, 57 days a year reach 90°F (3 of them 100°F or more) and 102 nights fall to 32°F or colder.
- Days at 90°F or more
- 57a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 102a normal year
- Days that stay below freezing
- 6high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00408414.
How sunny is Smyrna?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Smyrna, 4.3 kWh per square metre a day. June is the sunniest month (80%) and February the cloudiest (63%). Among the 459 U.S. places of 50,000 or more, that ranks tied 304th (with 25 others) in sunshine.
| 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 Smyrna need?
A normal year in Smyrna brings 3,960 heating degree days, 26% fewer than the median U.S. place (5,373), and 1,399 cooling degree days, 54% 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 4,328 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 861 | 0 |
| February | 685 | 1 |
| March | 526 | 4 |
| April | 251 | 27 |
| May | 76 | 104 |
| June | 5 | 267 |
| July | 0 | 394 |
| August | 1 | 373 |
| September | 27 | 192 |
| October | 232 | 35 |
| November | 539 | 2 |
| December | 759 | 1 |
| Year (annual) | 3,960 | 1,399 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00408414. 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 Smyrna's climate compare?
Smyrna is warmer than 40 of the other 115 places with their own NOAA record in Tennessee. Across the 7,247 U.S. stations with normals, its annual mean of 57.9°F is warmer than 69%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Smyrna share this climate record?
La Vergne 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.
- La Vergne, TN41,430 people · 8 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 Smyrna's climate
What is the coldest month in Smyrna?
January, with a normal high of 48°F and a normal low of 26°F. The warmest is July (90°F by day, 66°F at night).
Does it snow in Smyrna?
Yes. NOAA publishes no 1991-2020 snowfall normal for Smyrna's NOAA station; the nearest record that keeps one, Murfreesboro (10 miles away), records 2 inches of snow in a normal year.
What plant hardiness zone is Smyrna in?
The USDA's 2023 map puts Smyrna in zone 7b in ZIP code 37167.
How late can frost come in Smyrna?
In half of years the last 32°F night comes after April 13; in one year in ten it comes after May 4. Waiting until May 4 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Tennessee climateThe statewide normals and every place in the state
- Murfreesboro, TN11 miles from this station, 58.9°F a year
- Gladeville, TN13 miles from this station, 57.6°F a year
- Brentwood, TN14 miles from this station, 57.9°F a year
- Christiana, TN15 miles from this station, 57.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made