Germantown, Tennessee climate: Normal weather by month, frost dates and records
Germantown's normal year runs from 31°F January nights to 92°F July afternoons, with 55.2 inches of precipitation and 2 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 16.8°C, January lows of 0°C, July highs of 33°C, 1,402 mm of precipitation a year.
- NOAA stationGermantown (4 mi SE)
- Station IDUSC00403447
- Location35.08°N 89.74°W
- Elevation320 ft (98 m)
- From the center2 miles
- Population40,128
On October 24, the normal high in Germantown is 72°F and the normal low 47°F, and the chance of measurable rain or snow is 29%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Germantown.
- Jan 50° 31°
- Feb 55° 34°
- Mar 64° 42°
- Apr 74° 51°
- May 82° 61°
- Jun 89° 69°
- Jul 92° 73°
- Aug 91° 71°
- Sep 85° 63°
- Oct 75° 50°
- Nov 63° 41°
- Dec 53° 34°
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 Germantown each month?
July is the warmest month, with normal highs of 92°F; January the coldest, with normal lows of 31°F. The most precipitation falls in April (5.88 in), the least in September (3.26 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 50°F | 31°F | 40.8°F | 4.32 | 0.4 | 10 | <1 | 20 | 10 h |
| February | 55°F | 34°F | 44.5°F | 4.65 | 0.6 | 11 | <1 | 15 | 10 h 50 min |
| March | 64°F | 42°F | 53.2°F | 5.56 | 0.8 | 11 | <1 | 6 | 11 h 50 min |
| April | 74°F | 51°F | 62.3°F | 5.88 | 0.0 | 10 | 1 | 1 | 13 h |
| May | 82°F | 61°F | 71.1°F | 5.31 | 0.0 | 11 | 4 | <1 | 14 h |
| June | 89°F | 69°F | 78.8°F | 4.73 | 0.0 | 9 | 17 | <1 | 14 h 30 min |
| July | 92°F | 73°F | 82.2°F | 4.20 | 0.0 | 10 | 22 | <1 | 14 h 20 min |
| August | 91°F | 71°F | 81.2°F | 3.65 | 0.0 | 8 | 21 | <1 | 13 h 30 min |
| September | 85°F | 63°F | 74.3°F | 3.26 | 0.0 | 7 | 11 | <1 | 12 h 30 min |
| October | 75°F | 50°F | 62.8°F | 4.01 | 0.0 | 9 | 2 | 1 | 11 h 20 min |
| November | 63°F | 41°F | 51.5°F | 4.46 | 0.0 | 9 | <1 | 7 | 10 h 20 min |
| December | 53°F | 34°F | 43.5°F | 5.17 | 0.3 | 11 | <1 | 17 | 9 h 50 min |
| Year (annual) | 73°F | 52°F | 62.2°F | 55.20 | 2.1 | 115 | 78 | 66 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 10°C | 0°C | 4.9°C | 110 mm | 1 cm |
| February | 13°C | 1°C | 6.9°C | 118 mm | 2 cm |
| March | 18°C | 6°C | 11.8°C | 141 mm | 2 cm |
| April | 23°C | 11°C | 16.8°C | 149 mm | 0 cm |
| May | 28°C | 16°C | 21.7°C | 135 mm | 0 cm |
| June | 32°C | 21°C | 26.0°C | 120 mm | 0 cm |
| July | 33°C | 23°C | 27.9°C | 107 mm | 0 cm |
| August | 33°C | 22°C | 27.3°C | 93 mm | 0 cm |
| September | 30°C | 17°C | 23.5°C | 83 mm | 0 cm |
| October | 24°C | 10°C | 17.1°C | 102 mm | 0 cm |
| November | 17°C | 5°C | 10.8°C | 113 mm | 0 cm |
| December | 12°C | 1°C | 6.4°C | 131 mm | 1 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00403447; 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 Germantown?
Normal highs sit between 65°F and 85°F in April, May and October. Of those, October has the fewest days with rain (9).
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 USC00403447.
When is the last frost in Germantown?
In Germantown, the last spring frost (32°F) comes after March 22 in half of years and after April 9 in one year in ten; the first autumn frost comes before November 7 in half of years and before October 26 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
- March 221 year in 10 after April 9; 9 in 10 after March 5
- First autumn frost, half of years before
- November 71 year in 10 before October 26; 9 in 10 before November 23
NOAA puts the median frost-free season at 230 days, and the season without a hard freeze (28°F) at 255 days.
A hard freeze (28°F) comes after March 8 in half of springs and before November 18 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Germantown in zone 8a across its 2 ZIP code areas (8a in 38138, the largest). By the map's own method, the average of each year's coldest night over 1991-2020, Germantown's NOAA station is in zone 8a: the coldest night of a typical year reaches 11°F (20 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 USC00403447; 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 Germantown ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Germantown's 2 ZIP code areas are all in zone 8a. 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 Germantown?
In a normal year in Germantown, 78 days a year reach 90°F (3 of them 100°F or more), 66 nights fall to 32°F or colder and 115 days bring measurable precipitation.
- Days at 90°F or more
- 78a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 66a normal year
- Days that stay below freezing
- 5high of 32°F or less
- Days with 0.01 inch of precipitation
- 115a normal year
- Days with 1 inch of snow or more
- 1a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00403447.
How sunny is Germantown?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Germantown, 4.4 kWh per square metre a day. August is the sunniest month (83%) and February the cloudiest (65%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 2.4 |
| February | 65% | 3.0 |
| March | 69% | 4.1 |
| April | 75% | 5.3 |
| May | 77% | 6.0 |
| June | 83% | 6.6 |
| July | 83% | 6.3 |
| August | 83% | 5.8 |
| September | 81% | 4.9 |
| October | 78% | 3.8 |
| November | 74% | 2.8 |
| December | 67% | 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 Germantown need?
A normal year in Germantown brings 3,135 heating degree days, 42% fewer than the median U.S. place (5,373), and 2,138 cooling degree days, 2.4 times 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 5,470 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 753 | 1 |
| February | 578 | 2 |
| March | 383 | 16 |
| April | 154 | 73 |
| May | 31 | 221 |
| June | 0 | 416 |
| July | 0 | 533 |
| August | 0 | 502 |
| September | 11 | 288 |
| October | 145 | 75 |
| November | 412 | 9 |
| December | 670 | 2 |
| Year (annual) | 3,135 | 2,138 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00403447. 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 Germantown been warmer than normal lately?
2021 averaged 61.6°F, 0.6°F below the 1991-2020 normal of 62.2°F.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 61.6°F | −0.6°F | 54.78 | 8.5 |
Source: observed years: ACIS, station USC00403447. A year counts only with all twelve months complete.
How does Germantown's climate compare?
Germantown is warmer than 114 of the other 115 places with their own NOAA record in Tennessee, and wetter than 47. Across the 7,247 U.S. stations with normals, its annual mean of 62.2°F is warmer than 81%.
In the Köppen classification computed from these normals, Germantown 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 Germantown's climate
What is the coldest month in Germantown?
January, with a normal high of 50°F and a normal low of 31°F. The warmest is July (92°F by day, 73°F at night).
Does it snow in Germantown?
Yes: 2 inches in a normal year, falling on 2 days with 0.1 inch or more, the most in March (0.8 inches).
What is the rainiest month in Germantown?
April, with 5.88 in of precipitation in a normal year; the driest is September with 3.26 in.
What plant hardiness zone is Germantown in?
The USDA's 2023 map puts Germantown in zone 8a across its 2 ZIP code areas (8a in 38138, the largest). By the same method at Germantown's NOAA station, the coldest night of a typical year reaches 11°F (20 years, 1991-2020): zone 8a.
How late can frost come in Germantown?
In half of years the last 32°F night comes after March 22; in one year in ten it comes after April 9. Waiting until April 9 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Tennessee climateThe statewide normals and every place in the state
- Collierville, TN4 miles from this station, 61.1°F a year
- Olive Branch, MS10 miles from this station, 61.8°F a year
- Memphis, TN14 miles from this station, 63.4°F a year
- Moscow, TN19 miles from this station, 61.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made