Mill Gap, Virginia climate: Climate normals at a NOAA weather station
Mill Gap's normal year runs from 17°F January nights to 80°F July afternoons, with 45.3 inches of precipitation and 34 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.9°C, January lows of −9°C, July highs of 27°C, 1,149 mm of precipitation a year.
- NOAA stationMill Gap
- Station IDUSC00445595
- Location38.31°N 79.72°W
- Elevation2,421 ft (738 m)
On October 22, the normal high in Mill Gap is 61°F and the normal low 34°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 Mill Gap.
- Jan 39° 17°
- Feb 42° 18°
- Mar 50° 24°
- Apr 62° 33°
- May 71° 43°
- Jun 77° 51°
- Jul 80° 55°
- Aug 79° 55°
- Sep 74° 47°
- Oct 63° 36°
- Nov 52° 26°
- Dec 42° 20°
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 Mill Gap each month?
July is the warmest month, with normal highs of 80°F; January the coldest, with normal lows of 17°F. The most precipitation falls in May (4.85 in), the least in February (2.88 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 39°F | 17°F | 27.8°F | 3.33 | 8.2 | 12 | <1 | 28 | 9 h 50 min |
| February | 42°F | 18°F | 30.2°F | 2.88 | 8.6 | 11 | <1 | 26 | 10 h 50 min |
| March | 50°F | 24°F | 37.2°F | 3.93 | 7.5 | 12 | <1 | 25 | 11 h 50 min |
| April | 62°F | 33°F | 47.5°F | 4.16 | 0.7 | 13 | <1 | 14 | 13 h 10 min |
| May | 71°F | 43°F | 56.6°F | 4.85 | 0.0 | 15 | <1 | 4 | 14 h 10 min |
| June | 77°F | 51°F | 64.0°F | 4.49 | 0.0 | 12 | <1 | <1 | 14 h 50 min |
| July | 80°F | 55°F | 67.7°F | 4.34 | 0.0 | 13 | 1 | <1 | 14 h 40 min |
| August | 79°F | 55°F | 66.7°F | 3.70 | 0.0 | 12 | <1 | <1 | 13 h 40 min |
| September | 74°F | 47°F | 60.4°F | 3.97 | 0.0 | 9 | <1 | 1 | 12 h 30 min |
| October | 63°F | 36°F | 49.4°F | 3.01 | 0.1 | 9 | <1 | 11 | 11 h 20 min |
| November | 52°F | 26°F | 38.7°F | 3.02 | 1.5 | 9 | <1 | 23 | 10 h 10 min |
| December | 42°F | 20°F | 31.4°F | 3.57 | 7.1 | 12 | <1 | 27 | 9 h 30 min |
| Year (annual) | 61°F | 35°F | 48.1°F | 45.25 | 33.7 | 137 | 1 | 158 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −9°C | −2.3°C | 85 mm | 21 cm |
| February | 6°C | −8°C | −1.0°C | 73 mm | 22 cm |
| March | 10°C | −4°C | 2.9°C | 100 mm | 19 cm |
| April | 17°C | 0°C | 8.6°C | 106 mm | 2 cm |
| May | 21°C | 6°C | 13.7°C | 123 mm | 0 cm |
| June | 25°C | 11°C | 17.8°C | 114 mm | 0 cm |
| July | 27°C | 13°C | 19.8°C | 110 mm | 0 cm |
| August | 26°C | 13°C | 19.3°C | 94 mm | 0 cm |
| September | 23°C | 8°C | 15.8°C | 101 mm | 0 cm |
| October | 17°C | 2°C | 9.7°C | 76 mm | 0 cm |
| November | 11°C | −4°C | 3.7°C | 77 mm | 4 cm |
| December | 6°C | −6°C | −0.3°C | 91 mm | 18 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00445595; 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 Mill Gap?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September 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 USC00445595.
When is the last frost at Mill Gap?
In Mill Gap, the last spring frost (32°F) comes after May 12 in half of years and after May 28 in one year in ten; the first autumn frost comes before October 3 in half of years and before September 20 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
- May 121 year in 10 after May 28; 9 in 10 after April 28
- First autumn frost, half of years before
- October 31 year in 10 before September 20; 9 in 10 before October 15
NOAA puts the median frost-free season at 143 days, and the season without a hard freeze (28°F) at 162 days.
A hard freeze (28°F) comes after May 1 in half of springs and before October 13 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Mill Gap in zone 5b in ZIP code 24944, 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 6a: the coldest night of a typical year reaches −5°F (19 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 Virginia · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00445595; 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 Mill Gap?
In a normal year in Mill Gap, 1 day a year reaches 90°F, 158 nights fall to 32°F or colder and 137 days bring measurable precipitation.
- Days at 90°F or more
- 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 158a normal year
- Days that stay below freezing
- 24high of 32°F or less
- Days with 0.01 inch of precipitation
- 137a normal year
- Days with 1 inch of snow or more
- 12a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00445595.
How sunny is it at Mill Gap?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds at Mill Gap, 4.0 kWh per square metre a day. August is the sunniest month (75%) and January the cloudiest (64%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 64% | 2.0 |
| February | 66% | 2.9 |
| March | 67% | 3.9 |
| April | 69% | 4.9 |
| May | 68% | 5.3 |
| June | 73% | 6.0 |
| July | 75% | 5.8 |
| August | 75% | 5.3 |
| September | 73% | 4.4 |
| October | 71% | 3.3 |
| November | 72% | 2.4 |
| December | 64% | 1.8 |
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 Mill Gap record?
A normal year at Mill Gap brings 6,397 heating degree days, 19% more than the median U.S. place (5,373), and 284 cooling degree days, 69% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,232 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,152 | 0 |
| February | 974 | 0 |
| March | 860 | 0 |
| April | 524 | 0 |
| May | 269 | 8 |
| June | 79 | 51 |
| July | 25 | 109 |
| August | 36 | 88 |
| September | 163 | 25 |
| October | 484 | 2 |
| November | 787 | 0 |
| December | 1,043 | 0 |
| Year (annual) | 6,397 | 284 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00445595. 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.
Have recent years at Mill Gap been warmer than normal?
2025 averaged 48.9°F, 0.8°F above the 1991-2020 normal of 48.1°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 49.4°F | +1.3°F | 38.31 | 23.9 |
| 2022 | 48.1°F | at normal | 41.95 | 26.7 |
| 2023 | 49.4°F | +1.3°F | 33.25 | 9.2 |
| 2024 | 50.5°F | +2.4°F | 38.98 | 13.0 |
| 2025 | 48.9°F | +0.8°F | 41.72 | 31.8 |
Source: observed years: ACIS, station USC00445595. A year counts only with all twelve months complete.
How does Mill Gap's climate compare?
Mill Gap is warmer than 0 of the 81 places with their own NOAA record in Virginia, and wetter than 33. Across the 7,247 U.S. stations with normals, its annual mean of 48.1°F is warmer than 32%.
In the Köppen classification computed from these normals, Mill Gap is Dfb: continental, no dry season, warm 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 Mill Gap share this climate record?
3 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.
- Arbovale, WV155 people · 10 mi NW
- Green Bank, WV51 people · 10 mi NW
- Cass, WV0 people · 13 mi NW
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 Mill Gap's climate
What is the coldest month at Mill Gap?
January, with a normal high of 39°F and a normal low of 17°F. The warmest is July (80°F by day, 55°F at night).
Does it snow at Mill Gap?
Yes: 34 inches in a normal year, falling on 20 days with 0.1 inch or more, the most in February (8.6 inches).
What is the rainiest month at Mill Gap?
May, with 4.85 in of precipitation in a normal year; the driest is February with 2.88 in.
What plant hardiness zone is Mill Gap in?
The USDA's 2023 map puts Mill Gap in zone 5b in ZIP code 24944, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −5°F (19 years, 1991-2020): zone 6a.
How late can frost come at Mill Gap?
In half of years the last 32°F night comes after May 12; in one year in ten it comes after May 28. Waiting until May 28 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Virginia climateThe statewide normals and every place in the state
- Mustoe (1 mi SW), VA3 miles from this station, 48.9°F a year
- Frost (3 mi NE), WV6 miles from this station, 48.1°F a year
- Bartow, WV16 miles from this station, 47.4°F a year
- Snowshoe, WV16 miles from this station, 43.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made