Quincy, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Quincy weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast18%—89°74°—
- SundayJul 5Light Drizzle26%0.01″85°71°-4°
- MondayJul 6Light Drizzle——83°68°-2°
- TuesdayJul 7Clear——83°64°0°
- WednesdayJul 8Overcast——89°64°+6°
- ThursdayJul 9T-storm w/ Hail39%—90°70°+1°
- FridayJul 10Drizzle40%—86°71°-4°
AQI 27 (Good), driven by PM2.5. AQI projected to climb to 44 over the next 6 hours. PM2.5 at 8.9 µg/m³, PM10 at 9.9 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 during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 37 now. With UV 2.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 13 around 1 PM.
- Present
- AQI 37
- UV peak
- 2.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 13
PM × Wind × Precip
PM2.5 at 8.9 µg/m³, PM10 at 9.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.90
- Wind
- light
- 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
- 10:59 PM
- Moonset
- 10:11 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Quincy at a glance
- Today vs. normal: 11°F above the seasonal normal for this latitude
- Last frost: April 16 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 62301, 62305
16-Day Forecast — Quincy
- Sat89°74°18%
- Sun85°71°26%
- Mon83°68°7%
- Tue83°64°2%
- Wed89°64°4%
- Thu90°70°39%
- Fri86°71°40%
- Sat86°70°21%
- Sun74°59°8%
- Mon77°57°5%
- Tue81°60°10%
- Wed83°65°10%
- Thu85°65°16%
- Fri83°67°19%
- Sat83°70°14%
- Sun89°72°19%
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 — Quincy
SPC has placed Quincy 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 Quincy
- 62305
- 62301