Neapolis Reservoir & Edu Station, Tennessee climate: Climate normals at a NOAA weather station
Neapolis Reservoir & Edu Station's normal year runs from 29°F January nights to 90°F July afternoons, with 55.6 inches of precipitation and 4 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.3°C, January lows of −2°C, July highs of 32°C, 1,412 mm of precipitation a year.
- NOAA stationNeapolis Reservoir & Edu Station
- Station IDUSC00406435
- Location35.72°N 86.97°W
- Elevation700 ft (213 m)
On October 23, the normal high in Neapolis Reservoir & Edu Station is 71°F and the normal low 45°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 Neapolis Reservoir & Edu Station.
- Jan 49° 29°
- Feb 53° 32°
- Mar 62° 39°
- Apr 71° 47°
- May 79° 56°
- Jun 87° 64°
- Jul 90° 68°
- Aug 90° 66°
- Sep 84° 59°
- Oct 74° 47°
- Nov 62° 38°
- Dec 52° 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 at Neapolis Reservoir & Edu Station 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 December (5.90 in), the least in August (3.50 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 49°F | 29°F | 38.7°F | 4.62 | 1.0 | 12 | <1 | 22 | 10 h |
| February | 53°F | 32°F | 42.2°F | 5.09 | 1.5 | 11 | <1 | 18 | 10 h 50 min |
| March | 62°F | 39°F | 50.5°F | 5.50 | 0.8 | 12 | <1 | 11 | 11 h 50 min |
| April | 71°F | 47°F | 59.1°F | 5.07 | 0.0 | 11 | <1 | 3 | 13 h |
| May | 79°F | 56°F | 67.7°F | 5.08 | 0.0 | 12 | 3 | <1 | 14 h |
| June | 87°F | 64°F | 75.5°F | 4.30 | 0.0 | 11 | 12 | <1 | 14 h 30 min |
| July | 90°F | 68°F | 79.0°F | 4.46 | 0.0 | 10 | 19 | <1 | 14 h 20 min |
| August | 90°F | 66°F | 78.1°F | 3.50 | 0.0 | 9 | 18 | <1 | 13 h 30 min |
| September | 84°F | 59°F | 71.8°F | 4.38 | 0.0 | 8 | 9 | <1 | 12 h 30 min |
| October | 74°F | 47°F | 60.5°F | 3.84 | 0.0 | 8 | 1 | 4 | 11 h 20 min |
| November | 62°F | 38°F | 49.6°F | 3.84 | 0.0 | 10 | <1 | 13 | 10 h 20 min |
| December | 52°F | 32°F | 41.7°F | 5.90 | 0.2 | 12 | <1 | 20 | 9 h 50 min |
| Year (annual) | 71°F | 48°F | 59.5°F | 55.58 | 3.5 | 126 | 61 | 91 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 9°C | −2°C | 3.7°C | 117 mm | 3 cm |
| February | 12°C | 0°C | 5.7°C | 129 mm | 4 cm |
| March | 17°C | 4°C | 10.3°C | 140 mm | 2 cm |
| April | 22°C | 8°C | 15.1°C | 129 mm | 0 cm |
| May | 26°C | 13°C | 19.8°C | 129 mm | 0 cm |
| June | 30°C | 18°C | 24.2°C | 109 mm | 0 cm |
| July | 32°C | 20°C | 26.1°C | 113 mm | 0 cm |
| August | 32°C | 19°C | 25.6°C | 89 mm | 0 cm |
| September | 29°C | 15°C | 22.1°C | 111 mm | 0 cm |
| October | 23°C | 8°C | 15.8°C | 98 mm | 0 cm |
| November | 16°C | 3°C | 9.8°C | 98 mm | 0 cm |
| December | 11°C | 0°C | 5.4°C | 150 mm | 1 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00406435; 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.
Which months are mildest at Neapolis Reservoir & Edu Station?
Normal highs sit between 65°F and 85°F in April, May, 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 USC00406435.
When is the last frost at Neapolis Reservoir & Edu Station?
In Neapolis Reservoir & Edu Station, the last spring frost (32°F) comes after April 5 in half of years and after April 22 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 22; 9 in 10 after March 17
- 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 208 days, and the season without a hard freeze (28°F) at 231 days.
A hard freeze (28°F) comes after March 22 in half of springs and before November 8 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Neapolis Reservoir & Edu Station in zone 7b in ZIP code 37174, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 7a: the coldest night of a typical year reaches 5°F (27 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Tennessee · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00406435; 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 at Neapolis Reservoir & Edu Station?
In a normal year in Neapolis Reservoir & Edu Station, 61 days a year reach 90°F (3 of them 100°F or more), 91 nights fall to 32°F or colder and 126 days bring measurable precipitation.
- Days at 90°F or more
- 61a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 91a normal year
- Days that stay below freezing
- 6high of 32°F or less
- Days with 0.01 inch of precipitation
- 126a normal year
- Days with 1 inch of snow or more
- 1a normal year
The highest temperature in this station's record (since 1958) is 111°F, on August 14, 2010; the lowest is −23°F, on January 21, 1985.
The wettest calendar year on that record is 1979, with 74.46 in; the snowiest season is 1984–85, with 17.4 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00406435; records: ACIS (NOAA Regional Climate Centers), station USC00406435. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Neapolis Reservoir & Edu Station?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds at Neapolis Reservoir & Edu Station, 4.3 kWh per square metre a day. June is the sunniest month (80%) and February the cloudiest (63%).
| 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 many heating and cooling degree days does Neapolis Reservoir & Edu Station record?
A normal year at Neapolis Reservoir & Edu Station brings 3,602 heating degree days, 33% fewer than the median U.S. place (5,373), and 1,638 cooling degree days, 80% 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 4,743 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 816 | 1 |
| February | 641 | 1 |
| March | 457 | 9 |
| April | 216 | 40 |
| May | 61 | 144 |
| June | 4 | 318 |
| July | 0 | 434 |
| August | 1 | 405 |
| September | 24 | 227 |
| October | 193 | 52 |
| November | 466 | 6 |
| December | 725 | 1 |
| Year (annual) | 3,602 | 1,638 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00406435. 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 Neapolis Reservoir & Edu Station's climate compare?
Neapolis Reservoir & Edu Station is warmer than 89 of the 116 places with their own NOAA record in Tennessee, and wetter than 51. Across the 7,247 U.S. stations with normals, its annual mean of 59.5°F is warmer than 73%.
In the Köppen classification computed from these normals, Neapolis Reservoir & Edu Station 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.
Questions about Neapolis Reservoir & Edu Station's climate
What is the coldest month at Neapolis Reservoir & Edu Station?
January, with a normal high of 49°F and a normal low of 29°F. The warmest is July (90°F by day, 68°F at night).
Does it snow at Neapolis Reservoir & Edu Station?
Yes: 4 inches in a normal year, falling on 3 days with 0.1 inch or more, the most in February (1.5 inches).
What is the rainiest month at Neapolis Reservoir & Edu Station?
December, with 5.90 in of precipitation in a normal year; the driest is August with 3.50 in.
What plant hardiness zone is Neapolis Reservoir & Edu Station in?
The USDA's 2023 map puts Neapolis Reservoir & Edu Station in zone 7b in ZIP code 37174, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 5°F (27 years, 1991-2020): zone 7a.
How late can frost come at Neapolis Reservoir & Edu Station?
In half of years the last 32°F night comes after April 5; in one year in ten it comes after April 22. Waiting until April 22 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Tennessee climateThe statewide normals and every place in the state
- Spring Hill, TN4 miles from this station, 59.7°F a year
- Columbia, TN9 miles from this station, 58.0°F a year
- Franklin, TN16 miles from this station, 59.7°F a year
- Mount Pleasant, TN17 miles from this station, 59.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made