Vandalia, Illinois Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Vandalia weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast37%—89°72°—
- SundayJul 5Overcast27%—88°71°-1°
- MondayJul 6Overcast21%—87°69°-1°
- TuesdayJul 7Clear——84°64°-3°
- WednesdayJul 8Thunderstorm——88°65°+4°
- ThursdayJul 9Light Showers40%—85°70°-3°
- FridayJul 10Thunderstorm40%0.13″85°70°0°
AQI 64 (Moderate), driven by PM2.5. AQI down 13 over the last 6 hours (gradual decline). PM2.5 at 9.2 µg/m³, PM10 at 10.1 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.
What's driving it
PM × Wind × Precip
PM2.5 at 9.2 µg/m³, PM10 at 10.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.91
- 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
- 11:13 PM
- Moonset
- 11:09 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Vandalia at a glance
- Today vs. normal: 75°F — typical for the season
- Last frost: April 10 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 62471
16-Day Forecast — Vandalia
- Sat89°72°37%
- Sun88°71°27%
- Mon87°69°21%
- Tue84°64°8%
- Wed88°65°6%
- Thu85°70°40%
- Fri85°70°40%
- Sat79°66°18%
- Sun78°62°7%
- Mon82°59°4%
- Tue86°63°3%
- Wed87°69°17%
- Thu86°66°16%
- Fri87°68°23%
- Sat95°76°26%
- Sun92°77°19%
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 — Vandalia
SPC has placed Vandalia 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 Vandalia
- 62471