Williamstown, Kentucky Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Williamstown weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast11%—89°71°—
- SundayJul 5Heavy Drizzle38%0.08″90°71°+1°
- MondayJul 6Light Drizzle33%—82°69°-8°
- TuesdayJul 7Overcast16%—82°66°0°
- WednesdayJul 8Overcast——87°64°+5°
- ThursdayJul 9Thunderstorm37%—91°65°+4°
- FridayJul 10T-storm w/ Hail57%0.07″84°69°-7°
AQI 53 (Moderate), driven by PM2.5. AQI up 14 over the last 6 hours (gradual rise). PM2.5 at 9.4 µg/m³ (AQI 52) with a 0.90 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
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 49. Overcast through the UV peak window (cloud cover ~95%) — afternoon ozone should stay flat.
- Present
- AQI 49
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 6
PM × Wind × Precip
PM2.5 at 9.4 µg/m³ (AQI 52) with a 0.90 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.90
- Wind
- calm
- 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
- 11:55 PM
- Moonset
- 11:50 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Williamstown at a glance
- Today vs. normal: 10°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
- Sat89°71°11%
- Sun90°71°38%
- Mon82°69°33%
- Tue82°66°16%
- Wed87°64°5%
- Thu91°65°37%
- Fri84°69°57%
- Sat85°68°44%
- Sun77°62°21%
- Mon85°56°14%
- Tue86°60°10%
- Wed84°65°20%
- Thu84°61°30%
- Fri87°65°35%
- Sat94°69°27%
- Sun93°76°39%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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