Smyrna, TN Climate: Temperature by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Smyrna's primary NOAA station, SMYRNA 6S.
The climate verdict for Smyrna
Smyrna, Tennessee has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 58°F. July is the warmest month at 78°F and January the coldest at 37°F.
- 58°F
- annual average temperature (NOAA normal)
- 191 days
- frost-free days per growing season
Smyrna: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00408414 · Smyrna, TN 58°F mean
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-UNK · SWING-MID · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-PART
- TEMP-MILD 58°F
- RANK-UPPER #4,734
- PHOTO-FINISH ≈ Ashland Hanover…
- PRCP-UNK Rain n/a
- SWING-MID 40°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 3,960 HDD
- STN-1 USC00408414
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: Ashland Hanover County Muni, VA (+ 0.1 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every TN station list.
- Smyrna (this station) 58°F
- Cold Williamson, WV 58°F
- Hot Columbia, TN 58°F
- Near Ashland Hanover…, VA 58°F
- Near Wallops Island…, VA 58°F
Climate Living Index · Smyrna
Smyrna: 62/100 · grade C
Smyrna publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Smyrna, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 57.9°F · 9.6° from 67.5°F | 69/100 · C |
| Frost-free season | 191 days/year | 58/100 · C |
| Normal heat + freeze calendar | 133 calendar days | 57/100 · C |
Smyrna · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · heating-led station
Where Smyrna sits across the climate record
Available NOAA 1991–2020 fields for Smyrna are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- 69th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Seasonal temperature swing
- 37th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 48°F (9°C) | 26°F (-3°C) | 37°F (3°C) | N/A | 23.2 | 0.0 |
| February | 52°F (11°C) | 29°F (-2°C) | 41°F (5°C) | N/A | 19.0 | 0.0 |
| March | 61°F (16°C) | 35°F (2°C) | 48°F (9°C) | N/A | 14.1 | 0.0 |
| April | 71°F (22°C) | 44°F (7°C) | 58°F (14°C) | N/A | 3.4 | 0.3 |
| May | 79°F (26°C) | 53°F (12°C) | 66°F (19°C) | N/A | 0.1 | 1.4 |
| June | 86°F (30°C) | 61°F (16°C) | 74°F (23°C) | N/A | 0.0 | 11.4 |
| July | 90°F (32°C) | 66°F (19°C) | 78°F (25°C) | N/A | 0.0 | 17.3 |
| August | 90°F (32°C) | 64°F (18°C) | 77°F (25°C) | N/A | 0.0 | 19.0 |
| September | 85°F (29°C) | 56°F (14°C) | 71°F (21°C) | N/A | 0.1 | 7.1 |
| October | 73°F (23°C) | 44°F (7°C) | 59°F (15°C) | N/A | 5.0 | 0.3 |
| November | 61°F (16°C) | 33°F (1°C) | 47°F (8°C) | N/A | 15.3 | 0.0 |
| December | 52°F (11°C) | 30°F (-1°C) | 41°F (5°C) | N/A | 21.5 | 0.0 |
The year, day by day
Smyrna works both ends of the calendar. Normal highs climb to 90°F by August 6 and hold at or above 90°F on 30 dates, then normal lows drop to freezing or below on 103 dates, bottoming at 26°F around January 16.
When the heat sits
Normal highs reach 90°F from July 24 through August 22, covering 30 dates. The broader mild season, normal highs of 70°F or more, runs April 11 to October 24.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
The freezing stretch
The normal low stays at or below 32°F into March 3, then returns to freezing around November 22, covering 103 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
The widest day
October 25 carries the biggest normal gap between afternoon and dawn, 30°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Smyrna.
Monthly Precipitation
Average monthly rainfall
Frost Dates & Growing Season
First Fall Freeze
October 21
50% probability date
Last Spring Freeze
April 13
50% probability date
Growing Season
191 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,960
Higher = more heating needed
Cooling Degree Days
1,399
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside TN closest to Smyrna on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (58°F here).
- Albuquerque, NM 58°F · 0.0°F off
- Buffalo, OK 58°F · 0.0°F off
- Lenoir, NC 58°F · 0.0°F off
- Marion, NC 58°F · 0.0°F off
Data-derived climate profile
How Smyrna's climate pattern fits together
heating led · mid swing
Smyrna's energy balance leans toward cold weather: 3,960 annual heating degree days against 1,399 for cooling. Its 40.4°F seasonal range still makes the monthly rows more useful than the annual average alone.
Smyrna's frost-free season lasts about 191 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Smyrna's middle-range seasonal profile. The measured spread is 40.4°F. The annual average is 58°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
A moisture-range label is withheld because Smyrna's annual precipitation total is unavailable. Monthly source values remain visible where NOAA provides them, and no annual amount is reconstructed from incomplete data.
These labels group NOAA 1991-2020 normals from Smyrna's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Smyrna, not an official NOAA class or a year-ahead forecast.
Questions about Smyrna's climate
How many days above 90°F does Smyrna get? ▼
How much energy does heating and cooling require in Smyrna? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Smyrna's primary station: SMYRNA 6S (USC00408414). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 4769420). Match rule for Smyrna: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Smyrna comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.