Mechanicsburg, Illinois Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Mechanicsburg weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Foggy13%—85°71°—
- MondayJul 6Overcast——85°69°0°
- TuesdayJul 7Overcast——81°65°-4°
- WednesdayJul 8Partly Cloudy——84°64°+3°
- ThursdayJul 9T-storm w/ Hail38%0.70″87°69°+3°
- FridayJul 10Thunderstorm44%0.01″80°70°-7°
- SaturdayJul 11Drizzle22%0.04″83°69°+3°
AQI 25 (Good), driven by Ozone. Ozone at AQI 42 now. With UV 4.5 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 18 around 1 PM.
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 42 now. With UV 4.5 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 18 around 1 PM.
- Present
- AQI 42
- UV peak
- 4.5 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 18
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
- 11:15 PM
- Moonset
- 11:10 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Mechanicsburg at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 15 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 62545
16-Day Forecast — Mechanicsburg
- Sun85°71°13%
- Mon85°69°5%
- Tue81°65°1%
- Wed84°64°3%
- Thu87°69°38%
- Fri80°70°44%
- Sat83°69°22%
- Sun86°69°16%
- Mon89°70°7%
- Tue91°75°3%
- Wed80°63°6%
- Thu78°54°26%
- Fri82°62°25%
- Sat87°66°35%
- Sun86°71°42%
- Mon88°72°29%
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 — Mechanicsburg
SPC includes Mechanicsburg in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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 Mechanicsburg
- 62545