Stonewall Jackson Dam, West Virginia climate: Climate normals at a NOAA weather station
Stonewall Jackson Dam's normal year runs from 21°F January nights to 85°F July afternoons, with 51.5 inches of precipitation and 24 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.7°C, January lows of −6°C, July highs of 29°C, 1,308 mm of precipitation a year.
- NOAA stationStonewall Jackson Dam
- Station IDUSC00468522
- Location39.00°N 80.47°W
- Elevation1,045 ft (319 m)
On October 23, the normal high in Stonewall Jackson Dam is 65°F and the normal low 39°F, and the chance of measurable rain or snow is 39%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Stonewall Jackson Dam.
- Jan 41° 21°
- Feb 45° 23°
- Mar 53° 29°
- Apr 66° 38°
- May 75° 50°
- Jun 82° 59°
- Jul 85° 63°
- Aug 84° 61°
- Sep 78° 54°
- Oct 67° 42°
- Nov 55° 32°
- Dec 45° 27°
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 Stonewall Jackson Dam each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 21°F. The most precipitation falls in May (5.49 in), the least in November (3.28 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 41°F | 21°F | 31.0°F | 3.89 | 11.4 | 18 | <1 | 26 | 9 h 40 min |
| February | 45°F | 23°F | 34.0°F | 3.70 | 6.0 | 15 | <1 | 24 | 10 h 40 min |
| March | 53°F | 29°F | 41.2°F | 4.58 | 2.2 | 15 | <1 | 21 | 11 h 50 min |
| April | 66°F | 38°F | 52.2°F | 4.31 | 0.4 | 15 | <1 | 10 | 13 h 10 min |
| May | 75°F | 50°F | 62.1°F | 5.49 | 0.0 | 16 | 1 | 1 | 14 h 20 min |
| June | 82°F | 59°F | 70.2°F | 5.30 | 0.0 | 15 | 3 | <1 | 14 h 50 min |
| July | 85°F | 63°F | 73.7°F | 5.24 | 0.0 | 14 | 5 | <1 | 14 h 40 min |
| August | 84°F | 61°F | 72.7°F | 4.32 | 0.0 | 14 | 4 | <1 | 13 h 40 min |
| September | 78°F | 54°F | 66.2°F | 3.70 | 0.0 | 11 | 2 | <1 | 12 h 30 min |
| October | 67°F | 42°F | 54.6°F | 3.39 | 0.0 | 12 | <1 | 5 | 11 h 10 min |
| November | 55°F | 32°F | 43.6°F | 3.28 | 0.8 | 12 | <1 | 17 | 10 h 10 min |
| December | 45°F | 27°F | 35.8°F | 4.29 | 3.5 | 17 | <1 | 24 | 9 h 30 min |
| Year (annual) | 65°F | 42°F | 53.1°F | 51.49 | 24.3 | 173 | 15 | 128 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 5°C | −6°C | −0.6°C | 99 mm | 29 cm |
| February | 7°C | −5°C | 1.1°C | 94 mm | 15 cm |
| March | 12°C | −2°C | 5.1°C | 116 mm | 6 cm |
| April | 19°C | 3°C | 11.2°C | 109 mm | 1 cm |
| May | 24°C | 10°C | 16.7°C | 139 mm | 0 cm |
| June | 28°C | 15°C | 21.2°C | 135 mm | 0 cm |
| July | 29°C | 17°C | 23.2°C | 133 mm | 0 cm |
| August | 29°C | 16°C | 22.6°C | 110 mm | 0 cm |
| September | 26°C | 12°C | 19.0°C | 94 mm | 0 cm |
| October | 20°C | 5°C | 12.6°C | 86 mm | 0 cm |
| November | 13°C | 0°C | 6.4°C | 83 mm | 2 cm |
| December | 7°C | −3°C | 2.1°C | 109 mm | 9 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00468522; 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 Stonewall Jackson Dam?
Normal highs sit between 65°F and 85°F in April, May, June, July, August, September and October. Of those, September has the fewest days with rain (11).
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 USC00468522.
When is the last frost at Stonewall Jackson Dam?
In Stonewall Jackson Dam, the last spring frost (32°F) comes after April 26 in half of years and after May 13 in one year in ten; the first autumn frost comes before October 23 in half of years and before October 8 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 261 year in 10 after May 13; 9 in 10 after April 15
- First autumn frost, half of years before
- October 231 year in 10 before October 8; 9 in 10 before November 3
NOAA puts the median frost-free season at 179 days, and the season without a hard freeze (28°F) at 201 days.
A hard freeze (28°F) comes after April 15 in half of springs and before October 31 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Stonewall Jackson Dam in zone 6b in ZIP code 26452, the nearest ZIP area.
Frost dates for every NOAA station in West Virginia · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00468522; 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 at Stonewall Jackson Dam?
In a normal year in Stonewall Jackson Dam, 15 days a year reach 90°F, 128 nights fall to 32°F or colder and 173 days bring measurable precipitation.
- Days at 90°F or more
- 15a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 128a normal year
- Days that stay below freezing
- 22high of 32°F or less
- Days with 0.01 inch of precipitation
- 173a normal year
- Days with 1 inch of snow or more
- 10a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00468522.
How sunny is it at Stonewall Jackson Dam?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds at Stonewall Jackson Dam, 3.9 kWh per square metre a day. August is the sunniest month (78%) and December the cloudiest (55%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 55% | 1.7 |
| February | 59% | 2.5 |
| March | 63% | 3.5 |
| April | 68% | 4.7 |
| May | 70% | 5.4 |
| June | 75% | 6.0 |
| July | 76% | 5.8 |
| August | 78% | 5.4 |
| September | 77% | 4.5 |
| October | 69% | 3.1 |
| November | 67% | 2.1 |
| December | 55% | 1.4 |
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 Stonewall Jackson Dam record?
A normal year at Stonewall Jackson Dam brings 5,173 heating degree days, 4% fewer than the median U.S. place (5,373), and 875 cooling degree days, 4% 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 3,367 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,052 | 0 |
| February | 869 | 0 |
| March | 738 | 0 |
| April | 393 | 9 |
| May | 151 | 61 |
| June | 19 | 174 |
| July | 1 | 273 |
| August | 3 | 243 |
| September | 67 | 103 |
| October | 334 | 13 |
| November | 641 | 0 |
| December | 905 | 0 |
| Year (annual) | 5,173 | 875 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00468522. 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 Stonewall Jackson Dam been warmer than normal?
2025 averaged 53.3°F, 0.2°F above the 1991-2020 normal of 53.1°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 54.4°F | +1.3°F | 46.08 | 16.4 |
| 2022 | 53.0°F | −0.1°F | 55.46 | 24.2 |
| 2024 | 55.8°F | +2.7°F | 48.45 | 11.2 |
| 2025 | 53.3°F | +0.2°F | 50.52 | 47.8 |
Source: observed years: ACIS, station USC00468522. A year counts only with all twelve months complete.
How does Stonewall Jackson Dam's climate compare?
Stonewall Jackson Dam is warmer than 38 of the 63 places with their own NOAA record in West Virginia, and wetter than 47. Across the 7,247 U.S. stations with normals, its annual mean of 53.1°F is warmer than 54%.
In the Köppen classification computed from these normals, Stonewall Jackson Dam is Dfa: continental, 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 Stonewall Jackson Dam's climate
What is the coldest month at Stonewall Jackson Dam?
January, with a normal high of 41°F and a normal low of 21°F. The warmest is July (85°F by day, 63°F at night).
Does it snow at Stonewall Jackson Dam?
Yes: 24 inches in a normal year, falling on 19 days with 0.1 inch or more, the most in January (11.4 inches).
What is the rainiest month at Stonewall Jackson Dam?
May, with 5.49 in of precipitation in a normal year; the driest is November with 3.28 in.
What plant hardiness zone is Stonewall Jackson Dam in?
The USDA's 2023 map puts Stonewall Jackson Dam in zone 6b in ZIP code 26452, the nearest ZIP area.
How late can frost come at Stonewall Jackson Dam?
In half of years the last 32°F night comes after April 26; in one year in ten it comes after May 13. Waiting until May 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- West Virginia climateThe statewide normals and every place in the state
- Weston, WV2 miles from this station, 53.4°F a year
- Rock Cave, WV14 miles from this station, 51.8°F a year
- Buckhannon, WV14 miles from this station, 52.6°F a year
- Glenville, WV20 miles from this station, 53.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made