Lebanon, Tennessee climate: Normal weather by month, frost dates and records
Lebanon's normal year runs from 28°F January nights to 90°F July afternoons, with 54.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.1°C, January lows of −2°C, July highs of 32°C, 1,383 mm of precipitation a year.
- NOAA stationLebanon
- Station IDUSC00405108
- Location36.23°N 86.32°W
- Elevation525 ft (160 m)
- Population51,501
On October 23, the normal high in Lebanon is 70°F and the normal low 44°F, and the chance of measurable rain or snow is 28%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Lebanon.
- Jan 47° 28°
- Feb 52° 30°
- Mar 61° 38°
- Apr 71° 46°
- May 79° 56°
- Jun 87° 65°
- Jul 90° 69°
- Aug 90° 67°
- Sep 84° 60°
- Oct 73° 47°
- Nov 61° 37°
- Dec 51° 31°
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 Lebanon each month?
July is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 28°F. The most precipitation falls in May (5.61 in), the least in October (3.39 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 47°F | 28°F | 37.6°F | 4.67 | 11 | <1 | 22 | 10 h |
| February | 52°F | 30°F | 41.0°F | 4.91 | 10 | <1 | 19 | 10 h 50 min |
| March | 61°F | 38°F | 49.2°F | 4.97 | 11 | <1 | 12 | 11 h 50 min |
| April | 71°F | 46°F | 58.6°F | 4.93 | 10 | <1 | 3 | 13 h |
| May | 79°F | 56°F | 67.6°F | 5.61 | 11 | 2 | <1 | 14 h |
| June | 87°F | 65°F | 75.9°F | 4.50 | 10 | 11 | <1 | 14 h 40 min |
| July | 90°F | 69°F | 79.7°F | 4.84 | 10 | 18 | <1 | 14 h 20 min |
| August | 90°F | 67°F | 78.2°F | 3.91 | 8 | 17 | <1 | 13 h 30 min |
| September | 84°F | 60°F | 71.6°F | 3.85 | 7 | 7 | <1 | 12 h 30 min |
| October | 73°F | 47°F | 59.7°F | 3.39 | 8 | 1 | 3 | 11 h 20 min |
| November | 61°F | 37°F | 48.7°F | 3.71 | 9 | <1 | 13 | 10 h 20 min |
| December | 51°F | 31°F | 40.9°F | 5.16 | 11 | <1 | 20 | 9 h 40 min |
| Year (annual) | 70°F | 48°F | 59.1°F | 54.45 | 117 | 56 | 91 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 9°C | −2°C | 3.1°C | 119 mm |
| February | 11°C | −1°C | 5.0°C | 125 mm |
| March | 16°C | 3°C | 9.6°C | 126 mm |
| April | 22°C | 8°C | 14.8°C | 125 mm |
| May | 26°C | 13°C | 19.8°C | 142 mm |
| June | 31°C | 18°C | 24.4°C | 114 mm |
| July | 32°C | 21°C | 26.5°C | 123 mm |
| August | 32°C | 19°C | 25.7°C | 99 mm |
| September | 29°C | 15°C | 22.0°C | 98 mm |
| October | 23°C | 8°C | 15.4°C | 86 mm |
| November | 16°C | 3°C | 9.3°C | 94 mm |
| December | 10°C | 0°C | 4.9°C | 131 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Gladeville (13 miles away), gets 1 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00405108; 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 Lebanon?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, September has the fewest days with rain (7).
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 USC00405108.
When is the last frost in Lebanon?
In Lebanon, the last spring frost (32°F) comes after April 6 in half of years and after April 23 in one year in ten; the first autumn frost comes before October 28 in half of years and before October 15 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 61 year in 10 after April 23; 9 in 10 after March 20
- First autumn frost, half of years before
- October 281 year in 10 before October 15; 9 in 10 before November 11
NOAA puts the median frost-free season at 206 days, and the season without a hard freeze (28°F) at 228 days.
A hard freeze (28°F) comes after March 26 in half of springs and before November 8 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Lebanon in zone 7b in ZIP code 37087. By the map's own method, the average of each year's coldest night over 1991-2020, Lebanon's NOAA station is in zone 7b: the coldest night of a typical year reaches 6°F (18 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 USC00405108; 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 Lebanon?
In a normal year in Lebanon, 56 days a year reach 90°F (2 of them 100°F or more), 91 nights fall to 32°F or colder and 117 days bring measurable precipitation.
- Days at 90°F or more
- 56a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 91a normal year
- Days that stay below freezing
- 8high of 32°F or less
- Days with 0.01 inch of precipitation
- 117a normal year
The highest temperature in this station's record (since 1902) is 111°F, on August 9, 1930; the lowest is −20°F, on January 24, 1963.
The wettest calendar year on that record is 1979, with 77.17 in; the snowiest season is 1978–79, with 30.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00405108; records: ACIS (NOAA Regional Climate Centers), station USC00405108. Records use complete months only; a month missing more than three days is left out.
How sunny is Lebanon?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Lebanon, 4.2 kWh per square metre a day. August is the sunniest month (81%) and February the cloudiest (62%). 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 | 65% | 2.2 |
| February | 62% | 2.8 |
| March | 67% | 3.9 |
| April | 74% | 5.2 |
| May | 75% | 5.7 |
| June | 80% | 6.3 |
| July | 80% | 6.1 |
| August | 81% | 5.6 |
| September | 79% | 4.7 |
| October | 75% | 3.6 |
| November | 73% | 2.6 |
| December | 64% | 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 Lebanon need?
A normal year in Lebanon brings 3,802 heating degree days, 29% fewer than the median U.S. place (5,373), and 1,671 cooling degree days, 84% 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 4,688 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 849 | 0 |
| February | 674 | 0 |
| March | 497 | 7 |
| April | 232 | 40 |
| May | 67 | 149 |
| June | 4 | 332 |
| July | 0 | 456 |
| August | 0 | 411 |
| September | 25 | 223 |
| October | 211 | 47 |
| November | 495 | 5 |
| December | 748 | 1 |
| Year (annual) | 3,802 | 1,671 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00405108. 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 Lebanon been warmer than normal lately?
2025 averaged 60.3°F, 1.2°F above the 1991-2020 normal of 59.1°F.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2025 | 60.3°F | +1.2°F | 53.40 |
Over 44 complete years from 1962 to 2025, the station's annual mean temperature rose at a fitted 4.9°F per century (+0.27°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00405108; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Lebanon's climate compare?
Lebanon is warmer than 79 of the other 115 places with their own NOAA record in Tennessee, and wetter than 35. Across the 7,247 U.S. stations with normals, its annual mean of 59.1°F is warmer than 72%.
In the Köppen classification computed from these normals, Lebanon 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 Lebanon share this climate record?
2 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.
- Watertown, TN1,642 people · 13 mi SE
- Tuckers Crossroads, TN100 people · 9 mi E
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Lebanon's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Lebanon. This page uses Lebanon; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Lebanon (7 mi N) USC00405118 | 6 mi NE | 510 ft | 58.6°F | 27°F | 89°F | 52.7 | – | April 10 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Lebanon's climate
What is the coldest month in Lebanon?
January, with a normal high of 47°F and a normal low of 28°F. The warmest is July (90°F by day, 69°F at night).
Does it snow in Lebanon?
Yes. NOAA publishes no 1991-2020 snowfall normal for Lebanon's NOAA station; the nearest record that keeps one, Gladeville (13 miles away), records 1 inches of snow in a normal year.
What is the rainiest month in Lebanon?
May, with 5.61 in of precipitation in a normal year; the driest is October with 3.39 in.
What plant hardiness zone is Lebanon in?
The USDA's 2023 map puts Lebanon in zone 7b in ZIP code 37087. By the same method at Lebanon's NOAA station, the coldest night of a typical year reaches 6°F (18 years, 1991-2020): zone 7b.
How late can frost come in Lebanon?
In half of years the last 32°F night comes after April 6; in one year in ten it comes after April 23. Waiting until April 23 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Lebanon in OctoberThis month day by day, its records and recent years
- Tennessee climateThe statewide normals and every place in the state
- Gladeville, TN12 miles from this station, 57.6°F a year
- Hartsville/Trousdale County, TN12 miles from this station, 57.9°F a year
- Old Hickory Weather Office, TN14 miles from this station, 58.6°F a year
- Bethpage, TN16 miles from this station, 56.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made