Mount Vernon, Missouri Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Mount Vernon weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast27%—90°73°—
- SundayJul 5Heavy Showers29%1.1″87°69°-3°
- MondayJul 6Overcast——88°68°+1°
- TuesdayJul 7Light Drizzle——89°67°+1°
- WednesdayJul 8Clear——92°71°+3°
- ThursdayJul 9Overcast11%—95°75°+3°
- FridayJul 10Overcast34%—90°77°-5°
AQI 49 (Good), driven by PM2.5. AQI up 5 over the last 6 hours (gradual rise). PM2.5 at 10.8 µg/m³ (AQI 54) with a 0.75 fine-to-coarse ratio and 3 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 50 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 50
- UV peak
- 6.5 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 50
PM × Wind × Precip
PM2.5 at 10.8 µg/m³ (AQI 54) with a 0.75 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.75
- 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
- 11:06 PM
- Moonset
- 10:24 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Mount Vernon at a glance
- Today vs. normal: 15°F above the seasonal normal for this latitude
- Last frost: March 30 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 65712
16-Day Forecast — Mount Vernon
- Sat91°73°27%
- Sun87°70°29%
- Mon88°68°9%
- Tue89°67°8%
- Wed92°71°5%
- Thu95°75°11%
- Fri90°77°34%
- Sat78°66°21%
- Sun79°61°8%
- Mon80°59°5%
- Tue84°62°4%
- Wed86°65°9%
- Thu88°64°16%
- Fri87°70°13%
- Sat85°66°16%
- Sun80°65°29%
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 — Mount Vernon
SPC has placed Mount Vernon 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 Mount Vernon
- 65712