Williamstown, West Virginia Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Williamstown weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast23%—97°72°—
- SundayJul 5Overcast64%—95°73°-2°
- MondayJul 6Light Drizzle69%—89°66°-6°
- TuesdayJul 7Overcast22%—85°65°-4°
- WednesdayJul 8Overcast14%—92°64°+7°
- ThursdayJul 9Overcast49%—93°70°+1°
- FridayJul 10Thunderstorm53%—81°68°-12°
AQI 51 (Moderate), driven by Ozone. Ozone at AQI 49. Overcast through the UV peak window (cloud cover ~67%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 8 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 49. Overcast through the UV peak window (cloud cover ~67%) — afternoon ozone should stay flat.
- Present
- AQI 49
- UV peak
- 4.6 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 15
PM × Wind × Precip
PM2.5 at 6.4 µg/m³ (AQI 36) with a 0.93 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.93
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:19 PM
- Moonset
- 10:31 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Williamstown at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: April 12 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 26187
16-Day Forecast — Williamstown
- Sat97°72°23%
- Sun95°73°64%
- Mon89°66°69%
- Tue85°65°22%
- Wed92°64°14%
- Thu93°70°49%
- Fri81°68°53%
- Sat92°67°40%
- Sun80°63°34%
- Mon77°58°12%
- Tue84°59°11%
- Wed92°70°24%
- Thu94°69°23%
- Fri93°70°19%
- Sat85°71°26%
- Sun93°69°20%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Williamstown
SPC has placed Williamstown in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWMRGLMarginal Risk
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Williamstown
- 26187