Highwood, Illinois Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Highwood weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Rain78%0.48″78°65°—
- SundayJul 5Overcast11%—70°63°-8°
- MondayJul 6Overcast——73°64°+3°
- TuesdayJul 7Overcast——74°63°+1°
- WednesdayJul 8Overcast14%—83°65°+9°
- ThursdayJul 9Thunderstorm50%0.02″77°65°-6°
- FridayJul 10Overcast44%—72°65°-5°
AQI 39 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 6.6 µg/m³ (AQI 37) with a 0.89 fine-to-coarse ratio and 2 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 35. Overcast through the UV peak window (cloud cover ~62%) — afternoon ozone should stay flat.
- Present
- AQI 35
- UV peak
- 3.4 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 6.6 µg/m³ (AQI 37) with a 0.89 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.89
- 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
- 10:49 PM
- Moonset
- 9:55 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Highwood at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: April 29 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 60040
16-Day Forecast — Highwood
- Sat78°65°78%
- Sun70°63°11%
- Mon73°64°2%
- Tue74°63°0%
- Wed83°65°14%
- Thu77°65°50%
- Fri72°65°44%
- Sat82°66°11%
- Sun68°62°9%
- Mon72°61°9%
- Tue74°65°9%
- Wed78°67°23%
- Thu80°70°16%
- Fri83°72°19%
- Sat81°71°19%
- Sun83°72°28%
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 — Highwood
SPC has placed Highwood in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
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 Highwood
- 60040