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 4Partly Cloudy18%—92°70°—
- SundayJul 5Rain22%0.22″88°71°-4°
- MondayJul 6T-storm w/ Hail38%—88°72°0°
- TuesdayJul 7Overcast16%—88°69°0°
- WednesdayJul 8Clear20%—90°67°+2°
- ThursdayJul 9Overcast19%—92°71°+2°
- FridayJul 10Thunderstorm45%—89°75°-3°
AQI 49 (Good), driven by Ozone. AQI down 6 over the last 6 hours (gradual decline). Ozone at AQI 58 now. With UV 9.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 74 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 58 now. With UV 9.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 74 around 1 PM.
- Present
- AQI 58
- UV peak
- 9.5 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 74
PM × Wind × Precip
PM2.5 at 8.6 µg/m³ (AQI 48) with a 0.89 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.89
- 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: 13°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: 62970
16-Day Forecast — Olmsted
- Sat92°70°18%
- Sun88°71°22%
- Mon88°72°38%
- Tue88°69°16%
- Wed90°67°20%
- Thu92°71°19%
- Fri89°75°45%
- Sat89°70°30%
- Sun83°67°16%
- Mon80°59°11%
- Tue81°60°9%
- Wed85°63°7%
- Thu80°65°11%
- Fri78°68°10%
- Sat89°71°29%
- Sun90°72°17%
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 has placed Olmsted 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 Olmsted
- 62970