McHenry, Kentucky Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
McHenry weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Partly Cloudy——89°68°—
- SundayJul 5Overcast35%—88°75°-1°
- MondayJul 6Overcast33%—82°69°-6°
- TuesdayJul 7Overcast18%—80°66°-2°
- WednesdayJul 8Clear20%—84°63°+4°
- ThursdayJul 9Overcast23%—89°66°+5°
- FridayJul 10Overcast48%—93°76°+4°
AQI 38 (Good), driven by Ozone. Ozone at AQI 60 now. With UV 7.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 60 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 60 now. With UV 7.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 60 around 1 PM.
- Present
- AQI 60
- UV peak
- 7.5 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 60
PM × Wind × Precip
PM2.5 at 10.4 µg/m³ (AQI 53) with a 0.92 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.92
- 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
- 10:39 PM
- Moonset
- 9:56 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
McHenry at a glance
- Today vs. normal: 14°F above the seasonal normal for this latitude
- Last frost: March 31 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 42354
16-Day Forecast — McHenry
- Sat89°68°9%
- Sun88°74°35%
- Mon82°69°33%
- Tue80°66°18%
- Wed84°63°20%
- Thu89°66°23%
- Fri93°76°48%
- Sat84°69°44%
- Sun77°61°17%
- Mon78°57°9%
- Tue79°60°14%
- Wed83°60°33%
- Thu86°65°39%
- Fri86°68°29%
- Sat75°67°46%
- Sun75°67°42%
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 — McHenry
SPC includes McHenry in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- 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.
ZIP codes in McHenry
- 42320
- 42354