Winchester, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Winchester weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast20%—91°73°—
- SundayJul 5Light Drizzle15%0.02″86°72°-5°
- MondayJul 6Light Drizzle——84°68°-2°
- TuesdayJul 7Clear——82°64°-2°
- WednesdayJul 8Overcast——89°65°+7°
- ThursdayJul 9Light Showers40%0.07″87°71°-2°
- FridayJul 10Light Showers42%0.12″84°71°-3°
AQI 27 (Good), driven by PM2.5. AQI projected to climb to 44 over the next 6 hours. PM2.5 at 10.4 µg/m³, PM10 at 11.7 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
Ozone × UV × Sky
Ozone at AQI 43. Overcast through the UV peak window (cloud cover ~69%) — afternoon ozone should stay flat.
- Present
- AQI 43
- UV peak
- 3.5 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 10
PM × Wind × Precip
PM2.5 at 10.4 µg/m³, PM10 at 11.7 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.89
- Wind
- breezy
- 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
- 10:56 PM
- Moonset
- 10:08 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Winchester at a glance
- Today vs. normal: 17°F above the seasonal normal for this latitude
- Last frost: April 14 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 62694
16-Day Forecast — Winchester
- Sat91°73°20%
- Sun86°72°15%
- Mon84°68°9%
- Tue82°64°4%
- Wed89°65°7%
- Thu87°71°40%
- Fri84°71°42%
- Sat84°69°23%
- Sun74°59°6%
- Mon76°57°5%
- Tue76°60°12%
- Wed80°64°13%
- Thu83°65°13%
- Fri82°67°23%
- Sat86°70°17%
- Sun88°72°16%
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 — Winchester
SPC has placed Winchester in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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 Winchester
- 62694