Jackson, Tennessee climate: Normal weather by month, frost dates and records
Jackson's normal year runs from 29°F January nights to 90°F July afternoons, with 53.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.6°C, January lows of −1°C, July highs of 32°C, 1,370 mm of precipitation a year.
- NOAA stationJackson McKellar Airport
- Station IDUSW00003811
- Location35.59°N 88.92°W
- Elevation433 ft (132 m)
- Population69,303
On October 22, the normal high in Jackson is 71°F and the normal low 46°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 Jackson.
- Jan 49° 29°
- Feb 53° 33°
- Mar 62° 40°
- Apr 72° 48°
- May 80° 58°
- Jun 87° 66°
- Jul 90° 69°
- Aug 90° 67°
- Sep 84° 60°
- Oct 73° 48°
- Nov 61° 38°
- Dec 51° 32°
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 Jackson each month?
July is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 29°F. The most precipitation falls in May (5.58 in), the least in August (3.53 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 | 49°F | 29°F | 39.0°F | 4.07 | 10 | <1 | 19 | 10 h |
| February | 53°F | 33°F | 42.7°F | 4.40 | 10 | <1 | 15 | 10 h 50 min |
| March | 62°F | 40°F | 50.9°F | 5.55 | 12 | <1 | 9 | 11 h 50 min |
| April | 72°F | 48°F | 60.3°F | 5.12 | 11 | <1 | 2 | 13 h |
| May | 80°F | 58°F | 68.9°F | 5.58 | 11 | 2 | <1 | 14 h |
| June | 87°F | 66°F | 76.4°F | 4.76 | 10 | 12 | <1 | 14 h 30 min |
| July | 90°F | 69°F | 79.5°F | 4.37 | 9 | 19 | <1 | 14 h 20 min |
| August | 90°F | 67°F | 78.3°F | 3.53 | 8 | 17 | <1 | 13 h 30 min |
| September | 84°F | 60°F | 71.7°F | 3.58 | 7 | 7 | <1 | 12 h 30 min |
| October | 73°F | 48°F | 60.7°F | 3.63 | 8 | <1 | 2 | 11 h 20 min |
| November | 61°F | 38°F | 49.3°F | 4.33 | 9 | <1 | 11 | 10 h 20 min |
| December | 51°F | 32°F | 41.8°F | 5.01 | 11 | <1 | 17 | 9 h 50 min |
| Year (annual) | 71°F | 49°F | 60.0°F | 53.93 | 116 | 58 | 74 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 9°C | −1°C | 3.9°C | 103 mm |
| February | 12°C | 0°C | 5.9°C | 112 mm |
| March | 17°C | 4°C | 10.5°C | 141 mm |
| April | 22°C | 9°C | 15.7°C | 130 mm |
| May | 27°C | 14°C | 20.5°C | 142 mm |
| June | 31°C | 19°C | 24.7°C | 121 mm |
| July | 32°C | 21°C | 26.4°C | 111 mm |
| August | 32°C | 19°C | 25.7°C | 90 mm |
| September | 29°C | 15°C | 22.1°C | 91 mm |
| October | 23°C | 9°C | 15.9°C | 92 mm |
| November | 16°C | 3°C | 9.6°C | 110 mm |
| December | 11°C | 0°C | 5.4°C | 127 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. Jackson's own co-op station Jackson Experiment Station does: 3 inches of snow in a normal year (see the other stations below).
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003811; 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 Jackson?
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 USW00003811.
When is the last frost in Jackson?
In Jackson, the last spring frost (32°F) comes after April 5 in half of years and after April 21 in one year in ten; the first autumn frost comes before October 29 in half of years and before October 16 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 51 year in 10 after April 21; 9 in 10 after March 19
- First autumn frost, half of years before
- October 291 year in 10 before October 16; 9 in 10 before November 10
NOAA puts the median frost-free season at 207 days, and the season without a hard freeze (28°F) at 231 days.
A hard freeze (28°F) comes after March 25 in half of springs and before November 7 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Jackson in zone 7b across its 2 ZIP code areas (7b in 38305, the largest). By the map's own method, the average of each year's coldest night over 1991-2020, Jackson's NOAA station is in zone 7b: the coldest night of a typical year reaches 8°F (30 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 USW00003811; 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.
What hardiness zone is each Jackson ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Jackson's 2 ZIP code areas are all in zone 7b. Each ZIP's frost dates are in the frost tool.
Source: USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; ZIP areas in the place: Census Bureau 2020 ZCTA-to-place relationship file. A ZIP area counts when at least a tenth of its land (and 0.5 km²) lies in the place.
How hot and how cold does it get in Jackson?
In a normal year in Jackson, 58 days a year reach 90°F (1 of them 100°F or more), 74 nights fall to 32°F or colder and 116 days bring measurable precipitation.
- Days at 90°F or more
- 58a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 74a normal year
- Days that stay below freezing
- 6high of 32°F or less
- Days with 0.01 inch of precipitation
- 116a normal year
The highest temperature in this station's record (since 1948) is 107°F, on July 27, 1952; the lowest is −13°F, on January 24, 1963.
The wettest calendar year on that record is 2018, with 77.10 in; the snowiest season is 1984–85, with 24.7 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00003811; records: ACIS (NOAA Regional Climate Centers), station USW00003811. Records use complete months only; a month missing more than three days is left out.
How humid and windy is Jackson, and how clear are its skies?
The summer (June-August) dew point averages 69°F. The muggiest month is July, with an average dew point of 70°F, above the 65°F at which most people call the air sticky; the driest air comes in January (30°F). February is the windiest month (8.5 mph on average), and September has the most clear or nearly clear hours (78%).
| Month | Dew point | Humidity | Afternoon humidity | Wind | Clear or few clouds | Overcast |
|---|---|---|---|---|---|---|
| January | 30°F | 67% | 50% | 8.1 mph | 56% | 36% |
| February | 35°F | 65% | 48% | 8.5 mph | 55% | 35% |
| March | 44°F | 64% | 47% | 8.4 mph | 60% | 28% |
| April | 53°F | 69% | 49% | 7.4 mph | 62% | 22% |
| May | 64°F | 73% | 54% | 5.9 mph | 67% | 17% |
| June | 69°F | 74% | 54% | 5.3 mph | 77% | 9% |
| July | 70°F | 76% | 55% | 4.4 mph | 77% | 9% |
| August | 67°F | 75% | 52% | 4.4 mph | 76% | 10% |
| September | 56°F | 72% | 46% | 5.3 mph | 78% | 13% |
| October | 45°F | 72% | 49% | 6.2 mph | 64% | 26% |
| November | 36°F | 70% | 53% | 7.3 mph | 61% | 31% |
| December | 31°F | 72% | 57% | 7.8 mph | 53% | 39% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00003811. Monthly averages of all hours; afternoon humidity at 3 p.m. local standard time; sky as the share of hours NOAA's observations rate clear or few clouds (a dash where NOAA publishes no sky value).
How sunny is Jackson?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Jackson, 4.4 kWh per square metre a day. June is the sunniest month (82%) and February the cloudiest (64%). Among the 459 U.S. places of 50,000 or more, that ranks tied 276th (with 27 others) in sunshine.
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 68% | 2.4 |
| February | 64% | 2.9 |
| March | 68% | 4.0 |
| April | 74% | 5.3 |
| May | 76% | 5.9 |
| June | 82% | 6.5 |
| July | 82% | 6.3 |
| August | 82% | 5.7 |
| September | 81% | 4.9 |
| October | 77% | 3.8 |
| November | 74% | 2.8 |
| December | 66% | 2.1 |
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 Jackson need?
A normal year in Jackson brings 3,522 heating degree days, 34% fewer than the median U.S. place (5,373), and 1,717 cooling degree days, 89% 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 4,870 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 806 | 0 |
| February | 624 | 1 |
| March | 447 | 10 |
| April | 192 | 50 |
| May | 46 | 168 |
| June | 1 | 343 |
| July | 0 | 449 |
| August | 0 | 412 |
| September | 22 | 223 |
| October | 187 | 54 |
| November | 476 | 5 |
| December | 720 | 1 |
| Year (annual) | 3,522 | 1,717 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003811. 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 Jackson been warmer than normal lately?
2025 averaged 62.2°F, 2.2°F above the 1991-2020 normal of 60.0°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 60.3°F | +0.3°F | 52.23 |
| 2022 | 59.6°F | −0.4°F | 49.23 |
| 2023 | 61.3°F | +1.3°F | 45.00 |
| 2024 | 63.3°F | +3.3°F | 52.99 |
| 2025 | 62.2°F | +2.2°F | 47.33 |
Over 73 complete years from 1949 to 2025, the station's annual mean temperature rose at a fitted 2.2°F per century (+0.12°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USW00003811; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Jackson's climate compare?
Jackson is warmer than 98 of the other 115 places with their own NOAA record in Tennessee, and wetter than 28. Across the 7,247 U.S. stations with normals, its annual mean of 60.0°F is warmer than 75%.
In the Köppen classification computed from these normals, Jackson 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 Jackson 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.
- Three Way, TN1,922 people · 13 mi N
- Mercer, TN61 people · 11 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.
What do Jackson's other NOAA stations record?
2 more NOAA stations keep 1991-2020 normals in or near Jackson. This page uses Jackson McKellar Airport; the others differ by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Jackson (4 mi NE) USC00404568 | 10 mi NE | 430 ft | 59.3°F | 28°F | 90°F | 55.2 | 4 | April 4 |
| Jackson Experiment Station USC00404561 | 4 mi NE | 400 ft | 59.9°F | 27°F | 91°F | 56.9 | 3 | April 2 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Jackson's climate
What is the coldest month in Jackson?
January, with a normal high of 49°F and a normal low of 29°F. The warmest is July (90°F by day, 69°F at night).
Does it snow in Jackson?
Yes. NOAA publishes no 1991-2020 snowfall normal for Jackson's NOAA station; Jackson's own co-op station Jackson Experiment Station records 3 inches of snow in a normal year.
What is the rainiest month in Jackson?
May, with 5.58 in of precipitation in a normal year; the driest is August with 3.53 in.
What plant hardiness zone is Jackson in?
The USDA's 2023 map puts Jackson in zone 7b across its 2 ZIP code areas (7b in 38305, the largest). By the same method at Jackson's NOAA station, the coldest night of a typical year reaches 8°F (30 years, 1991-2020): zone 7b.
How late can frost come in Jackson?
In half of years the last 32°F night comes after April 5; in one year in ten it comes after April 21. Waiting until April 21 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Jackson in OctoberThis month day by day, its records and recent years
- Tennessee climateThe statewide normals and every place in the state
- Henderson, TN15 miles from this station, 58.1°F a year
- Alamo, TN18 miles from this station, 59.5°F a year
- Brownsville, TN19 miles from this station, 60.9°F a year
- Bolivar, TN23 miles from this station, 59.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made