Havana, Illinois Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Havana weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——84°70°—
- MondayJul 6Overcast——83°68°-1°
- TuesdayJul 7Overcast——83°65°0°
- WednesdayJul 8Overcast——85°67°+2°
- ThursdayJul 9Overcast38%—83°71°-2°
- FridayJul 10Showers46%0.25″84°69°+1°
- SaturdayJul 11Heavy Drizzle23%0.12″83°69°-1°
AQI 30 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 45 now. With UV 7.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 44 around 1 PM.
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 45 now. With UV 7.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 44 around 1 PM.
- Present
- AQI 45
- UV peak
- 7.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 44
PM × Wind × Precip
PM2.5 at 7.4 µg/m³ (AQI 41) with a 0.84 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.84
- Wind
- light
- 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
- 11:18 PM
- Moonset
- 11:12 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Havana at a glance
- Today vs. normal: 10°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
- Sun84°70°6%
- Mon83°68°4%
- Tue83°65°0%
- Wed85°67°3%
- Thu83°71°38%
- Fri84°69°46%
- Sat83°69°23%
- Sun86°68°14%
- Mon78°64°5%
- Tue75°58°3%
- Wed78°61°6%
- Thu78°63°24%
- Fri83°65°24%
- Sat86°67°27%
- Sun88°70°26%
- Mon89°72°23%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 includes Havana in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
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.
ZIP codes in Havana
- 62644