Olney, Illinois Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Olney weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast22%—88°70°—
- MondayJul 6Overcast13%—86°69°-2°
- TuesdayJul 7Overcast18%—82°68°-4°
- WednesdayJul 8Overcast16%—86°65°+4°
- ThursdayJul 9Light Showers43%—89°70°+3°
- FridayJul 10Thunderstorm48%—86°72°-3°
- SaturdayJul 11Light Drizzle40%—81°70°-5°
AQI 38 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 9.6 µg/m³ (AQI 52) with a 0.86 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 during the projected peak around 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 47. Overcast through the UV peak window (cloud cover ~61%) — afternoon ozone should stay flat.
- Present
- AQI 47
- UV peak
- 6.4 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 20
PM × Wind × Precip
PM2.5 at 9.6 µg/m³ (AQI 52) with a 0.86 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.86
- 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
- 11:09 PM
- Moonset
- 11:05 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Olney at a glance
- Today vs. normal: 7°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: 62450
16-Day Forecast — Olney
- Sun86°70°22%
- Mon86°69°13%
- Tue82°68°18%
- Wed86°65°16%
- Thu89°70°43%
- Fri86°72°48%
- Sat81°70°40%
- Sun88°69°16%
- Mon90°71°9%
- Tue94°75°7%
- Wed82°64°10%
- Thu80°59°19%
- Fri83°63°26%
- Sat89°67°39%
- Sun93°74°34%
- Mon89°77°33%
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 — Olney
SPC includes Olney in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- 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 Olney
- 62450