Williamstown, Kentucky Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Williamstown weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast11%—90°71°—
- SundayJul 5Light Rain38%0.12″90°71°0°
- MondayJul 6Light Drizzle33%—80°68°-10°
- TuesdayJul 7Light Drizzle16%—80°63°0°
- WednesdayJul 8Overcast——86°63°+6°
- ThursdayJul 9Overcast37%—89°64°+3°
- FridayJul 10Showers57%0.29″90°70°+1°
AQI 50 (Good), driven by Ozone. AQI up 10 over the last 6 hours (gradual rise). Ozone at AQI 56. Overcast through the UV peak window (cloud cover ~88%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 56. Overcast through the UV peak window (cloud cover ~88%) — afternoon ozone should stay flat.
- Present
- AQI 56
- UV peak
- 0.6 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 7
PM × Wind × Precip
PM2.5 at 6.6 µg/m³, PM10 at 7.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.87
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 11:31 PM
- Moonset
- 10:45 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Williamstown at a glance
- Today vs. normal: 16°F above the seasonal normal for this latitude
- Last frost: April 8 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 41097
16-Day Forecast — Williamstown
- Sat90°71°11%
- Sun90°71°38%
- Mon80°68°33%
- Tue80°63°16%
- Wed86°63°5%
- Thu89°64°37%
- Fri90°70°57%
- Sat82°66°44%
- Sun79°60°21%
- Mon79°55°14%
- Tue82°56°10%
- Wed86°58°20%
- Thu88°64°30%
- Fri89°67°35%
- Sat80°68°27%
- Sun75°66°39%
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 Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
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
- 41097