Olmsted, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Olmsted weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast20%—92°69°—
- SundayJul 5Heavy Rain24%1.7″85°70°-7°
- MondayJul 6Light Showers24%—88°71°+3°
- TuesdayJul 7Overcast35%—88°69°0°
- WednesdayJul 8Clear20%—90°67°+2°
- ThursdayJul 9Overcast30%—92°71°+2°
- FridayJul 10Light Drizzle33%—89°75°-3°
AQI 54 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 7.2 µg/m³ (AQI 40) with a 0.95 fine-to-coarse ratio and 5 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 31 now. With UV 0.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 7 around 1 PM.
- Present
- AQI 31
- UV peak
- 0.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 7
PM × Wind × Precip
PM2.5 at 7.2 µg/m³ (AQI 40) with a 0.95 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.95
- Wind
- light
- 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
- 10:47 PM
- Moonset
- 10:05 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Olmsted at a glance
- Today vs. normal: 72°F — typical for the season
- 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: 62970
16-Day Forecast — Olmsted
- Sat92°69°20%
- Sun85°70°24%
- Mon88°71°24%
- Tue88°69°35%
- Wed90°67°20%
- Thu92°71°30%
- Fri89°75°33%
- Sat89°70°26%
- Sun83°67°15%
- Mon80°59°6%
- Tue81°60°4%
- Wed85°63°7%
- Thu80°65°13%
- Fri78°68°16%
- Sat89°71°14%
- Sun90°72°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 — Olmsted
SPC includes Olmsted in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
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 Olmsted
- 62970