Hartford, Illinois Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Hartford weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——86°59°—
- FridayJun 5Overcast——90°67°+4°
- SaturdayJun 6Heavy Drizzle15%—89°71°-1°
- SundayJun 7Showers43%0.23″79°70°-10°
- MondayJun 8Light Showers63%—89°70°+10°
- TuesdayJun 9Thunderstorm37%—95°73°+6°
- WednesdayJun 10Overcast17%—95°76°0°
Ozone at AQI 85 now. AQI up 16 in the last 6 hours — air quality is degrading. With UV 5.2 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 42 by mid-afternoon.
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 85 now. With UV 5.2 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 42 by mid-afternoon.
- Present
- AQI 85
- UV peak
- 5.2 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 42
PM × Wind × Precip
PM2.5 at 9.6 µg/m³, PM10 at 11.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.81
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 4:26 AM
- Moonset
- 2:06 PM
- In sign
- ♒︎ Aquarius
Fireflies pulse through the magnolias
Hartford at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 9 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 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 — Hartford
SPC has placed Hartford in the General Thunderstorms category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- 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.