Tygart Dam, West Virginia climate: Climate normals at a NOAA weather station
Tygart Dam's normal year runs from 21°F January nights to 81°F July afternoons, with 48.6 inches of precipitation and 26 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.8°C, January lows of −6°C, July highs of 27°C, 1,233 mm of precipitation a year.
- NOAA stationTygart Dam
- Station IDUSC00468986
- Location39.31°N 80.03°W
- Elevation1,235 ft (376 m)
On October 23, the normal high in Tygart Dam is 62°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 Tygart Dam.
- Jan 39° 21°
- Feb 42° 23°
- Mar 52° 29°
- Apr 64° 39°
- May 72° 49°
- Jun 78° 57°
- Jul 81° 61°
- Aug 80° 60°
- Sep 76° 53°
- Oct 65° 42°
- Nov 53° 32°
- Dec 43° 26°
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 Tygart Dam each month?
July is the warmest month, with normal highs of 81°F; January the coldest, with normal lows of 21°F. The most precipitation falls in July (5.48 in), the least in November (3.14 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 39°F | 21°F | 30.0°F | 3.37 | 9.7 | 17 | <1 | 26 | 9 h 40 min |
| February | 42°F | 23°F | 32.5°F | 3.32 | 7.7 | 14 | <1 | 25 | 10 h 40 min |
| March | 52°F | 29°F | 40.4°F | 3.87 | 3.3 | 13 | <1 | 20 | 11 h 50 min |
| April | 64°F | 39°F | 51.3°F | 4.34 | 0.2 | 14 | <1 | 8 | 13 h 10 min |
| May | 72°F | 49°F | 60.1°F | 4.88 | 0.0 | 15 | <1 | 1 | 14 h 20 min |
| June | 78°F | 57°F | 67.2°F | 4.92 | 0.0 | 14 | <1 | <1 | 15 h |
| July | 81°F | 61°F | 71.3°F | 5.48 | 0.0 | 13 | 2 | <1 | 14 h 40 min |
| August | 80°F | 60°F | 70.2°F | 4.37 | 0.0 | 12 | 1 | <1 | 13 h 50 min |
| September | 76°F | 53°F | 64.4°F | 3.64 | 0.0 | 10 | 1 | <1 | 12 h 30 min |
| October | 65°F | 42°F | 53.3°F | 3.40 | 0.1 | 12 | <1 | 4 | 11 h 10 min |
| November | 53°F | 32°F | 42.6°F | 3.14 | 0.9 | 11 | <1 | 17 | 10 h |
| December | 43°F | 26°F | 34.5°F | 3.83 | 3.6 | 15 | <1 | 24 | 9 h 30 min |
| Year (annual) | 62°F | 41°F | 51.5°F | 48.56 | 25.5 | 161 | 4 | 124 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −6°C | −1.1°C | 86 mm | 25 cm |
| February | 6°C | −5°C | 0.3°C | 84 mm | 20 cm |
| March | 11°C | −2°C | 4.7°C | 98 mm | 8 cm |
| April | 18°C | 4°C | 10.7°C | 110 mm | 1 cm |
| May | 22°C | 9°C | 15.6°C | 124 mm | 0 cm |
| June | 25°C | 14°C | 19.6°C | 125 mm | 0 cm |
| July | 27°C | 16°C | 21.8°C | 139 mm | 0 cm |
| August | 27°C | 16°C | 21.2°C | 111 mm | 0 cm |
| September | 24°C | 12°C | 18.0°C | 92 mm | 0 cm |
| October | 18°C | 5°C | 11.8°C | 86 mm | 0 cm |
| November | 12°C | 0°C | 5.9°C | 80 mm | 2 cm |
| December | 6°C | −3°C | 1.4°C | 97 mm | 9 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00468986; 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 Tygart Dam?
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 (10).
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 USC00468986.
When is the last frost at Tygart Dam?
In Tygart Dam, the last spring frost (32°F) comes after April 26 in half of years and after May 14 in one year in ten; the first autumn frost comes before October 22 in half of years and before October 10 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 14; 9 in 10 after April 12
- First autumn frost, half of years before
- October 221 year in 10 before October 10; 9 in 10 before November 3
NOAA puts the median frost-free season at 178 days, and the season without a hard freeze (28°F) at 202 days.
A hard freeze (28°F) comes after April 12 in half of springs and before November 1 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Tygart Dam in zone 6b in ZIP code 26354, 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 USC00468986; 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 Tygart Dam?
In a normal year in Tygart Dam, 4 days a year reach 90°F, 124 nights fall to 32°F or colder and 161 days bring measurable precipitation.
- Days at 90°F or more
- 4a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 124a normal year
- Days that stay below freezing
- 28high of 32°F or less
- Days with 0.01 inch of precipitation
- 161a normal year
- Days with 1 inch of snow or more
- 11a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00468986.
How sunny is it at Tygart Dam?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds at Tygart 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 Tygart Dam record?
A normal year at Tygart Dam brings 5,493 heating degree days, 2% more than the median U.S. place (5,373), and 600 cooling degree days, 34% 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 2,957 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,086 | 0 |
| February | 910 | 0 |
| March | 763 | 1 |
| April | 416 | 5 |
| May | 188 | 38 |
| June | 39 | 107 |
| July | 6 | 201 |
| August | 9 | 170 |
| September | 87 | 69 |
| October | 372 | 10 |
| November | 672 | 0 |
| December | 944 | 0 |
| Year (annual) | 5,493 | 600 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00468986. 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 Tygart Dam been warmer than normal?
2025 averaged 52.5°F, 1.0°F above the 1991-2020 normal of 51.5°F. 2 of the 3 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2022 | 51.5°F | at normal | 50.55 | 25.0 |
| 2024 | 54.9°F | +3.4°F | 40.37 | – |
| 2025 | 52.5°F | +1.0°F | 43.80 | – |
Source: observed years: ACIS, station USC00468986. A year counts only with all twelve months complete.
How does Tygart Dam's climate compare?
Tygart Dam is warmer than 12 of the 63 places with their own NOAA record in West Virginia, and wetter than 37. Across the 7,247 U.S. stations with normals, its annual mean of 51.5°F is warmer than 47%.
In the Köppen classification computed from these normals, Tygart Dam 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 Tygart Dam share this climate record?
Grafton has no NOAA station with 1991-2020 normals of its 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.
- Grafton, WV4,575 people · 2 mi N
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 Tygart Dam's climate
What is the coldest month at Tygart Dam?
January, with a normal high of 39°F and a normal low of 21°F. The warmest is July (81°F by day, 61°F at night).
Does it snow at Tygart Dam?
Yes: 26 inches in a normal year, falling on 21 days with 0.1 inch or more, the most in January (9.7 inches).
What is the rainiest month at Tygart Dam?
July, with 5.48 in of precipitation in a normal year; the driest is November with 3.14 in.
What plant hardiness zone is Tygart Dam in?
The USDA's 2023 map puts Tygart Dam in zone 6b in ZIP code 26354, the nearest ZIP area.
How late can frost come at Tygart Dam?
In half of years the last 32°F night comes after April 26; in one year in ten it comes after May 14. Waiting until May 14 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
- Clarksburg, WV11 miles from this station, 54.9°F a year
- Fairmont, WV12 miles from this station, 53.6°F a year
- Rowlesburg, WV19 miles from this station, 51.5°F a year
- Belington, WV21 miles from this station, 50.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made