Williamsville, Missouri Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Williamsville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast20%—95°74°—
- SundayJul 5Rain33%0.16″88°72°-7°
- MondayJul 6T-storm w/ Hail39%—92°69°+4°
- TuesdayJul 7Overcast15%—93°70°+1°
- WednesdayJul 8Partly Cloudy10%—94°68°+1°
- ThursdayJul 9Partly Cloudy19%—97°72°+3°
- FridayJul 10Light Drizzle31%—96°74°-1°
AQI 35 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 11.1 µg/m³, PM10 at 13.0 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 45. Overcast through the UV peak window (cloud cover ~87%) — afternoon ozone should stay flat.
- Present
- AQI 45
- UV peak
- 7.6 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 23
PM × Wind × Precip
PM2.5 at 11.1 µg/m³, PM10 at 13.0 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.85
- 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
- 10:53 PM
- Moonset
- 10:11 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Williamsville at a glance
- Today vs. normal: 15°F above the seasonal normal for this latitude
- Last frost: March 29 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 63967
16-Day Forecast — Williamsville
- Sat95°74°20%
- Sun88°72°33%
- Mon92°69°39%
- Tue93°70°15%
- Wed94°68°10%
- Thu97°72°19%
- Fri96°74°31%
- Sat96°72°22%
- Sun93°68°13%
- Mon87°60°6%
- Tue87°61°6%
- Wed87°64°15%
- Thu78°65°20%
- Fri80°68°13%
- Sat89°70°19%
- Sun94°73°23%
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 — Williamsville
SPC has placed Williamsville in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- 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 Williamsville
- 63967