Grantsville, West Virginia climate: Normal weather by month, frost dates and records
Grantsville's normal year runs from 21°F January nights to 86°F July afternoons, with 49.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.0°C, January lows of −6°C, July highs of 30°C, 1,263 mm of precipitation a year.
- NOAA stationGrantsville (1 mi ESE)
- Station IDUSC00463648
- Location38.91°N 81.08°W
- Elevation706 ft (215 m)
- From the centerunder 1 mile
- Population463
On October 23, the normal high in Grantsville is 66°F and the normal low 39°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Grantsville.
- Jan 42° 21°
- Feb 46° 23°
- Mar 55° 29°
- Apr 68° 38°
- May 76° 49°
- Jun 83° 59°
- Jul 86° 63°
- Aug 85° 62°
- Sep 80° 54°
- Oct 68° 42°
- Nov 57° 31°
- Dec 46° 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 in Grantsville each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 21°F. The most precipitation falls in May (5.59 in), the least in November (3.12 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 42°F | 21°F | 31.6°F | 3.73 | – | <1 | 26 | 9 h 40 min |
| February | 46°F | 23°F | 34.4°F | 3.35 | – | <1 | 25 | 10 h 40 min |
| March | 55°F | 29°F | 41.8°F | 4.27 | – | <1 | 20 | 11 h 50 min |
| April | 68°F | 38°F | 53.1°F | 3.91 | – | <1 | 8 | 13 h 10 min |
| May | 76°F | 49°F | 62.7°F | 5.59 | – | 1 | 1 | 14 h 20 min |
| June | 83°F | 59°F | 70.7°F | 5.34 | – | 4 | <1 | 14 h 50 min |
| July | 86°F | 63°F | 74.4°F | 5.36 | – | 8 | <1 | 14 h 40 min |
| August | 85°F | 62°F | 73.5°F | 3.94 | – | 7 | <1 | 13 h 40 min |
| September | 80°F | 54°F | 67.0°F | 3.67 | – | 4 | <1 | 12 h 30 min |
| October | 68°F | 42°F | 55.0°F | 3.56 | – | 1 | 4 | 11 h 20 min |
| November | 57°F | 31°F | 43.9°F | 3.12 | – | <1 | 19 | 10 h 10 min |
| December | 46°F | 26°F | 35.5°F | 3.90 | – | <1 | 24 | 9 h 30 min |
| Year (annual) | 66°F | 41°F | 53.6°F | 49.74 | – | 25 | 127 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 6°C | −6°C | −0.2°C | 95 mm |
| February | 8°C | −5°C | 1.3°C | 85 mm |
| March | 13°C | −2°C | 5.4°C | 108 mm |
| April | 20°C | 4°C | 11.7°C | 99 mm |
| May | 24°C | 10°C | 17.1°C | 142 mm |
| June | 28°C | 15°C | 21.5°C | 136 mm |
| July | 30°C | 17°C | 23.6°C | 136 mm |
| August | 30°C | 16°C | 23.1°C | 100 mm |
| September | 27°C | 12°C | 19.4°C | 93 mm |
| October | 20°C | 5°C | 12.8°C | 90 mm |
| November | 14°C | 0°C | 6.6°C | 79 mm |
| December | 8°C | −4°C | 1.9°C | 99 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Rosedale (3 mi NNW) (11 miles away), gets 28 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00463648; 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 Grantsville?
Normal highs sit between 65°F and 85°F in April, May, June, September and October.
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 USC00463648.
When is the last frost in Grantsville?
In Grantsville, the last spring frost (32°F) comes after April 26 in half of years and after May 10 in one year in ten; the first autumn frost comes before October 20 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 10; 9 in 10 after April 15
- First autumn frost, half of years before
- October 201 year in 10 before October 8; 9 in 10 before November 1
NOAA puts the median frost-free season at 175 days, and the season without a hard freeze (28°F) at 196 days.
A hard freeze (28°F) comes after April 15 in half of springs and before October 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Grantsville in zone 6b in ZIP code 26147, 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 USC00463648; 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 in Grantsville?
In a normal year in Grantsville, 25 days a year reach 90°F and 127 nights fall to 32°F or colder.
- Days at 90°F or more
- 25a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 127a normal year
- Days that stay below freezing
- 18high of 32°F or less
The highest temperature in this station's record (since 1941) is 102°F, on July 15, 1954; the lowest is −21°F, on January 28, 1963.
The wettest calendar year on that record is 2003, with 61.14 in; the snowiest season is 2015–16, with 33.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00463648; records: ACIS (NOAA Regional Climate Centers), station USC00463648. Records use complete months only; a month missing more than three days is left out.
How sunny is Grantsville?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Grantsville, 3.9 kWh per square metre a day. August is the sunniest month (78%) and January the cloudiest (57%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 57% | 1.8 |
| February | 59% | 2.5 |
| March | 64% | 3.6 |
| April | 69% | 4.9 |
| May | 71% | 5.5 |
| June | 77% | 6.1 |
| July | 76% | 5.8 |
| August | 78% | 5.4 |
| September | 77% | 4.5 |
| October | 70% | 3.2 |
| November | 69% | 2.3 |
| December | 57% | 1.6 |
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 Grantsville need?
A normal year in Grantsville brings 5,062 heating degree days, 6% fewer than the median U.S. place (5,373), and 947 cooling degree days, 4% more 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 3,488 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,035 | 0 |
| February | 858 | 0 |
| March | 721 | 1 |
| April | 365 | 8 |
| May | 139 | 66 |
| June | 14 | 185 |
| July | 1 | 294 |
| August | 2 | 264 |
| September | 55 | 115 |
| October | 325 | 14 |
| November | 633 | 0 |
| December | 913 | 0 |
| Year (annual) | 5,062 | 947 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00463648. 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 Grantsville's climate compare?
Grantsville is warmer than 39 of the other 62 places with their own NOAA record in West Virginia, and wetter than 42. Across the 7,247 U.S. stations with normals, its annual mean of 53.6°F is warmer than 55%.
In the Köppen classification computed from these normals, Grantsville 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 Grantsville's climate
What is the coldest month in Grantsville?
January, with a normal high of 42°F and a normal low of 21°F. The warmest is July (86°F by day, 63°F at night).
Does it snow in Grantsville?
Yes. NOAA publishes no 1991-2020 snowfall normal for Grantsville's NOAA station; the nearest record that keeps one, Rosedale (3 mi NNW) (11 miles away), records 28 inches of snow in a normal year.
What is the rainiest month in Grantsville?
May, with 5.59 in of precipitation in a normal year; the driest is November with 3.12 in.
What plant hardiness zone is Grantsville in?
The USDA's 2023 map puts Grantsville in zone 6b in ZIP code 26147, the nearest ZIP area.
How late can frost come in Grantsville?
In half of years the last 32°F night comes after April 26; in one year in ten it comes after May 10. Waiting until May 10 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
- Creston, WV11 miles from this station, 52.8°F a year
- Rosedale (3 mi NNW), WV11 miles from this station, 51.2°F a year
- Glenville, WV14 miles from this station, 53.9°F a year
- Spencer, WV17 miles from this station, 52.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made