New Haven, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
New Haven weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast19%—93°69°—
- SundayJul 5Overcast20%—90°73°-3°
- MondayJul 6Overcast21%—87°72°-3°
- TuesdayJul 7Overcast18%—83°69°-4°
- WednesdayJul 8Clear23%—87°66°+4°
- ThursdayJul 9Overcast33%—92°70°+5°
- FridayJul 10Thunderstorm42%0.50″86°72°-6°
AQI 51 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±4 points). PM2.5 at 8.7 µg/m³ (AQI 48) with a 0.92 fine-to-coarse ratio and 4 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 37 now. With UV 5.2 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 18 around 1 PM.
- Present
- AQI 37
- UV peak
- 5.2 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 18
PM × Wind × Precip
PM2.5 at 8.7 µg/m³ (AQI 48) with a 0.92 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.92
- Wind
- calm
- 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
- 10:44 PM
- Moonset
- 10:01 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
New Haven at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: April 3 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 62867
16-Day Forecast — New Haven
- Sat93°69°19%
- Sun90°73°20%
- Mon87°72°21%
- Tue83°69°18%
- Wed87°66°23%
- Thu92°70°33%
- Fri86°72°42%
- Sat88°71°24%
- Sun78°64°15%
- Mon74°58°5%
- Tue78°61°7%
- Wed82°63°10%
- Thu82°65°16%
- Fri78°71°13%
- Sat83°71°26%
- Sun88°73°27%
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 — New Haven
SPC has placed New Haven 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 New Haven
- 62867