Williamson, West Virginia climate: Normal weather by month, frost dates and records
Williamson's normal year runs from 26°F January nights to 89°F July afternoons, with 48.3 inches of precipitation and 13 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.3°C, January lows of −3°C, July highs of 31°C, 1,227 mm of precipitation a year.
- NOAA stationWilliamson
- Station IDUSC00469610
- Location37.67°N 82.28°W
- Elevation760 ft (232 m)
- From the centerunder 1 mile
- Population2,779
On October 23, the normal high in Williamson is 69°F and the normal low 43°F, and the chance of measurable rain or snow is 32%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Williamson.
- Jan 47° 26°
- Feb 51° 29°
- Mar 60° 35°
- Apr 72° 44°
- May 79° 54°
- Jun 85° 63°
- Jul 89° 67°
- Aug 88° 66°
- Sep 82° 59°
- Oct 72° 47°
- Nov 61° 35°
- Dec 50° 30°
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 Williamson each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 26°F. The most precipitation falls in July (5.84 in), the least in November (2.99 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 47°F | 26°F | 36.1°F | 3.37 | 4.4 | 13 | <1 | 23 | 9 h 50 min |
| February | 51°F | 29°F | 39.8°F | 3.37 | 3.0 | 11 | <1 | 20 | 10 h 50 min |
| March | 60°F | 35°F | 47.1°F | 4.68 | 3.1 | 13 | <1 | 14 | 11 h 50 min |
| April | 72°F | 44°F | 57.6°F | 4.02 | 0.1 | 12 | 1 | 3 | 13 h 10 min |
| May | 79°F | 54°F | 66.3°F | 4.34 | 0.0 | 13 | 2 | <1 | 14 h 10 min |
| June | 85°F | 63°F | 73.9°F | 5.38 | 0.0 | 13 | 9 | <1 | 14 h 50 min |
| July | 89°F | 67°F | 77.5°F | 5.84 | 0.0 | 12 | 13 | <1 | 14 h 30 min |
| August | 88°F | 66°F | 76.6°F | 3.90 | 0.0 | 10 | 13 | <1 | 13 h 40 min |
| September | 82°F | 59°F | 70.6°F | 3.13 | 0.0 | 9 | 6 | <1 | 12 h 30 min |
| October | 72°F | 47°F | 59.1°F | 3.16 | 0.0 | 10 | <1 | 1 | 11 h 20 min |
| November | 61°F | 35°F | 47.9°F | 2.99 | 0.1 | 11 | <1 | 14 | 10 h 10 min |
| December | 50°F | 30°F | 40.2°F | 4.12 | 2.4 | 12 | <1 | 20 | 9 h 30 min |
| Year (annual) | 70°F | 46°F | 57.7°F | 48.30 | 13.1 | 138 | 44 | 95 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 8°C | −3°C | 2.3°C | 86 mm | 11 cm |
| February | 10°C | −2°C | 4.3°C | 86 mm | 8 cm |
| March | 15°C | 1°C | 8.4°C | 119 mm | 8 cm |
| April | 22°C | 6°C | 14.2°C | 102 mm | 0 cm |
| May | 26°C | 12°C | 19.1°C | 110 mm | 0 cm |
| June | 30°C | 17°C | 23.3°C | 137 mm | 0 cm |
| July | 31°C | 19°C | 25.3°C | 148 mm | 0 cm |
| August | 31°C | 19°C | 24.8°C | 99 mm | 0 cm |
| September | 28°C | 15°C | 21.4°C | 80 mm | 0 cm |
| October | 22°C | 8°C | 15.1°C | 80 mm | 0 cm |
| November | 16°C | 2°C | 8.8°C | 76 mm | 0 cm |
| December | 10°C | −1°C | 4.6°C | 105 mm | 6 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00469610; 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 Williamson?
Normal highs sit between 65°F and 85°F in April, May, September and October. 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 USC00469610.
When is the last frost in Williamson?
In Williamson, the last spring frost (32°F) comes after April 8 in half of years and after April 25 in one year in ten; the first autumn frost comes before November 2 in half of years and before October 21 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 81 year in 10 after April 25; 9 in 10 after March 26
- First autumn frost, half of years before
- November 21 year in 10 before October 21; 9 in 10 before November 13
NOAA puts the median frost-free season at 206 days, and the season without a hard freeze (28°F) at 228 days.
A hard freeze (28°F) comes after March 29 in half of springs and before November 10 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Williamson in zone 7a in ZIP code 41503, 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 USC00469610; 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 Williamson?
In a normal year in Williamson, 44 days a year reach 90°F (1 of them 100°F or more), 95 nights fall to 32°F or colder and 138 days bring measurable precipitation.
- Days at 90°F or more
- 44a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 95a normal year
- Days that stay below freezing
- 10high of 32°F or less
- Days with 0.01 inch of precipitation
- 138a normal year
- Days with 1 inch of snow or more
- 5a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00469610.
How sunny is Williamson?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Williamson, 4.1 kWh per square metre a day. August is the sunniest month (77%) and February the cloudiest (59%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 61% | 2.0 |
| February | 59% | 2.6 |
| March | 64% | 3.7 |
| April | 70% | 5.0 |
| May | 72% | 5.6 |
| June | 77% | 6.2 |
| July | 76% | 5.8 |
| August | 77% | 5.4 |
| September | 76% | 4.5 |
| October | 72% | 3.4 |
| November | 71% | 2.5 |
| December | 61% | 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 much heating and cooling does Williamson need?
A normal year in Williamson brings 4,016 heating degree days, 25% fewer than the median U.S. place (5,373), and 1,397 cooling degree days, 54% more than 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 4,311 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 894 | 0 |
| February | 705 | 0 |
| March | 559 | 4 |
| April | 251 | 29 |
| May | 80 | 119 |
| June | 5 | 272 |
| July | 0 | 389 |
| August | 1 | 360 |
| September | 22 | 190 |
| October | 216 | 32 |
| November | 513 | 2 |
| December | 770 | 0 |
| Year (annual) | 4,016 | 1,397 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00469610. 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 Williamson been warmer than normal lately?
2024 averaged 60.0°F, 2.3°F above the 1991-2020 normal of 57.7°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 58.3°F | +0.6°F | 47.15 | 7.1 |
| 2022 | 57.9°F | +0.2°F | 51.28 | 18.8 |
| 2023 | 59.2°F | +1.5°F | 43.15 | 1.6 |
| 2024 | 60.0°F | +2.3°F | 42.09 | 12.4 |
Source: observed years: ACIS, station USC00469610. A year counts only with all twelve months complete.
How does Williamson's climate compare?
Williamson is warmer than 62 of the other 62 places with their own NOAA record in West Virginia, and wetter than 35. Across the 7,247 U.S. stations with normals, its annual mean of 57.7°F is warmer than 68%.
In the Köppen classification computed from these normals, Williamson 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.
Which places near Williamson share this climate record?
11 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.
- Coal Run Village, KY1,596 people · 18 mi SW
- Chattaroy, WV577 people · 2 mi N
- Betsy Layne, KY573 people · 21 mi SW
- Red Jacket, WV539 people · 8 mi E
- Delbarton, WV388 people · 5 mi NE
- Phelps, KY387 people · 13 mi SE
- Matewan, WV374 people · 7 mi SE
- South Williamson, KY301 people · 1 mi SW
- McCarr, KY260 people · 7 mi SE
- Belfry, KY150 people · 4 mi S
- Freeburn, KY146 people · 10 mi SE
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 Williamson's climate
What is the coldest month in Williamson?
January, with a normal high of 47°F and a normal low of 26°F. The warmest is July (89°F by day, 67°F at night).
Does it snow in Williamson?
Yes: 13 inches in a normal year, falling on 7 days with 0.1 inch or more, the most in January (4.4 inches).
What is the rainiest month in Williamson?
July, with 5.84 in of precipitation in a normal year; the driest is November with 2.99 in.
What plant hardiness zone is Williamson in?
The USDA's 2023 map puts Williamson in zone 7a in ZIP code 41503, the nearest ZIP area.
How late can frost come in Williamson?
In half of years the last 32°F night comes after April 8; in one year in ten it comes after April 25. Waiting until April 25 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
- Inez, KY19 miles from this station, 55.0°F a year
- Dunlow (1 mi SW), WV21 miles from this station, 55.1°F a year
- Logan, WV21 miles from this station, 57.5°F a year
- R.D. Bailey Lake, WV25 miles from this station, 54.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made