Havana, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Havana weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Rain40%0.25″88°69°—
- SundayJul 5Overcast16%—83°70°-5°
- MondayJul 6Overcast——84°67°+1°
- TuesdayJul 7Clear——82°63°-2°
- WednesdayJul 8Overcast——84°64°+2°
- ThursdayJul 9Light Drizzle39%—84°72°0°
- FridayJul 10Drizzle39%—80°68°-4°
AQI 28 (Good), driven by PM2.5. AQI projected to climb to 44 over the next 6 hours. PM2.5 at 10.6 µg/m³, PM10 at 12.1 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 ~72%) — afternoon ozone should stay flat.
- Present
- AQI 43
- UV peak
- 3.7 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 11
PM × Wind × Precip
PM2.5 at 10.6 µg/m³, PM10 at 12.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.88
- Wind
- light
- Recent rain
- 1h 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
- 10:55 PM
- Moonset
- 10:06 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Havana at a glance
- Today vs. normal: 13°F above the seasonal normal for this latitude
- Last frost: April 18 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 62644
16-Day Forecast — Havana
- Sat88°69°40%
- Sun83°70°16%
- Mon84°67°5%
- Tue82°63°3%
- Wed84°64°4%
- Thu84°72°39%
- Fri80°68°39%
- Sat85°68°16%
- Sun73°60°7%
- Mon76°57°6%
- Tue76°61°10%
- Wed80°64°16%
- Thu83°65°14%
- Fri83°69°26%
- Sat86°70°26%
- Sun86°73°20%
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 — Havana
SPC has placed Havana 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 Havana
- 62644