Decaturville, Tennessee climate: Normal weather by month, frost dates and records
Decaturville's normal year runs from 27°F January nights to 88°F July afternoons, with 56.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.9°C, January lows of −3°C, July highs of 31°C, 1,445 mm of precipitation a year.
- NOAA stationDecaturville
- Station IDUSC00402390
- Location35.60°N 88.12°W
- Elevation495 ft (151 m)
- Population816
On October 24, the normal high in Decaturville is 69°F and the normal low 43°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 Decaturville.
- Jan 48° 27°
- Feb 53° 30°
- Mar 62° 38°
- Apr 71° 47°
- May 78° 57°
- Jun 85° 65°
- Jul 88° 69°
- Aug 88° 67°
- Sep 83° 59°
- Oct 73° 47°
- Nov 61° 37°
- Dec 51° 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 Decaturville each month?
July is the warmest month, with normal highs of 88°F; January the coldest, with normal lows of 27°F. The most precipitation falls in April (5.85 in), the least in August (3.28 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 48°F | 27°F | 37.5°F | 4.64 | 12 | <1 | 22 | 10 h |
| February | 53°F | 30°F | 41.6°F | 4.59 | 13 | <1 | 15 | 10 h 50 min |
| March | 62°F | 38°F | 49.8°F | 5.60 | 13 | <1 | 10 | 11 h 50 min |
| April | 71°F | 47°F | 59.4°F | 5.85 | 11 | <1 | 2 | 13 h |
| May | 78°F | 57°F | 67.6°F | 4.61 | 12 | 1 | <1 | 14 h |
| June | 85°F | 65°F | 74.9°F | 5.53 | 11 | 5 | <1 | 14 h 30 min |
| July | 88°F | 69°F | 78.5°F | 4.73 | 10 | 11 | <1 | 14 h 20 min |
| August | 88°F | 67°F | 77.6°F | 3.28 | 10 | 8 | <1 | 13 h 30 min |
| September | 83°F | 59°F | 71.4°F | 4.24 | 8 | 7 | <1 | 12 h 30 min |
| October | 73°F | 47°F | 59.7°F | 3.66 | 8 | 1 | 2 | 11 h 20 min |
| November | 61°F | 37°F | 49.0°F | 4.44 | 10 | <1 | 14 | 10 h 20 min |
| December | 51°F | 30°F | 40.6°F | 5.73 | 12 | <1 | 18 | 9 h 50 min |
| Year (annual) | 70°F | 48°F | 58.9°F | 56.90 | 127 | 34 | 82 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 9°C | −3°C | 3.1°C | 118 mm |
| February | 12°C | −1°C | 5.3°C | 117 mm |
| March | 17°C | 3°C | 9.9°C | 142 mm |
| April | 22°C | 9°C | 15.2°C | 149 mm |
| May | 26°C | 14°C | 19.8°C | 117 mm |
| June | 29°C | 18°C | 23.8°C | 140 mm |
| July | 31°C | 21°C | 25.8°C | 120 mm |
| August | 31°C | 20°C | 25.3°C | 83 mm |
| September | 29°C | 15°C | 21.9°C | 108 mm |
| October | 23°C | 8°C | 15.4°C | 93 mm |
| November | 16°C | 3°C | 9.4°C | 113 mm |
| December | 11°C | −1°C | 4.8°C | 146 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Parsons (1 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 USC00402390; 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 Decaturville?
Normal highs sit between 65°F and 85°F in April, May, June, September and October. Of those, September has the fewest days with rain (8).
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 USC00402390.
When is the last frost in Decaturville?
In Decaturville, the last spring frost (32°F) comes after April 4 in half of years and after April 20 in one year in ten; the first autumn frost comes before October 30 in half of years and before October 17 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 41 year in 10 after April 20; 9 in 10 after March 17
- First autumn frost, half of years before
- October 301 year in 10 before October 17; 9 in 10 before November 11
NOAA puts the median frost-free season at 208 days, and the season without a hard freeze (28°F) at 229 days.
A hard freeze (28°F) comes after March 24 in half of springs and before November 7 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Decaturville in zone 7b in ZIP code 38329, the nearest ZIP area.
Frost dates for every NOAA station in Tennessee · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00402390; 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 Decaturville?
In a normal year in Decaturville, 34 days a year reach 90°F (1 of them 100°F or more), 82 nights fall to 32°F or colder and 127 days bring measurable precipitation.
- Days at 90°F or more
- 34a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 82a normal year
- Days that stay below freezing
- 7high of 32°F or less
- Days with 0.01 inch of precipitation
- 127a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00402390.
How sunny is Decaturville?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Decaturville, 4.4 kWh per square metre a day. June is the sunniest month (82%) and February the cloudiest (64%).
| 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 Decaturville need?
A normal year in Decaturville brings 3,753 heating degree days, 30% fewer than the median U.S. place (5,373), and 1,577 cooling degree days, 74% 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 4,613 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 852 | 0 |
| February | 657 | 1 |
| March | 482 | 9 |
| April | 211 | 43 |
| May | 67 | 147 |
| June | 2 | 299 |
| July | 0 | 417 |
| August | 0 | 391 |
| September | 26 | 218 |
| October | 213 | 47 |
| November | 486 | 6 |
| December | 758 | 0 |
| Year (annual) | 3,753 | 1,577 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00402390. 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 Decaturville been warmer than normal lately?
2025 averaged 60.3°F, 1.4°F above the 1991-2020 normal of 58.9°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 59.8°F | +0.9°F | 55.23 |
| 2022 | 59.2°F | +0.3°F | 55.15 |
| 2024 | 61.3°F | +2.4°F | 53.80 |
| 2025 | 60.3°F | +1.4°F | 55.87 |
Source: observed years: ACIS, station USC00402390. A year counts only with all twelve months complete.
How does Decaturville's climate compare?
Decaturville is warmer than 72 of the other 115 places with their own NOAA record in Tennessee, and wetter than 65. Across the 7,247 U.S. stations with normals, its annual mean of 58.9°F is warmer than 72%.
In the Köppen classification computed from these normals, Decaturville 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 Decaturville 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.
- Scotts Hill, TN891 people · 9 mi SW
- Sardis, TN420 people · 14 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.
Questions about Decaturville's climate
What is the coldest month in Decaturville?
January, with a normal high of 48°F and a normal low of 27°F. The warmest is July (88°F by day, 69°F at night).
Does it snow in Decaturville?
Yes. NOAA publishes no 1991-2020 snowfall normal for Decaturville's NOAA station; the nearest record that keeps one, Parsons (1 miles away), records 2 inches of snow in a normal year.
What is the rainiest month in Decaturville?
April, with 5.85 in of precipitation in a normal year; the driest is August with 3.28 in.
What plant hardiness zone is Decaturville in?
The USDA's 2023 map puts Decaturville in zone 7b in ZIP code 38329, the nearest ZIP area.
How late can frost come in Decaturville?
In half of years the last 32°F night comes after April 4; in one year in ten it comes after April 20. Waiting until April 20 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Tennessee climateThe statewide normals and every place in the state
- Parsons, TN1 miles from this station, 60.2°F a year
- Mousetail Landing State Park, TN7 miles from this station, 59.2°F a year
- Linden, TN16 miles from this station, 58.3°F a year
- Lexington, TN16 miles from this station, 59.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made