Algonquin, Illinois Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Algonquin weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast11%—75°64°—
- MondayJul 6Overcast——78°61°+3°
- TuesdayJul 7Overcast——81°60°+3°
- WednesdayJul 8Overcast——81°66°0°
- ThursdayJul 9Showers53%0.14″81°66°0°
- FridayJul 10Light Drizzle40%—81°64°0°
- SaturdayJul 11Light Drizzle20%0.01″81°66°0°
AQI 36 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 9.7 µg/m³, PM10 at 10.2 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 33. Overcast through the UV peak window (cloud cover ~84%) — afternoon ozone should stay flat.
- Present
- AQI 33
- UV peak
- 3.5 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 9.7 µg/m³, PM10 at 10.2 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.95
- Wind
- light
- Recent rain
- 0h 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
- 11:12 PM
- Moonset
- 11:04 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Algonquin at a glance
- Today vs. normal: 70°F — typical for the season
- 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: 60102
16-Day Forecast — Algonquin
- Sun75°65°11%
- Mon78°61°3%
- Tue81°60°0%
- Wed81°66°9%
- Thu81°66°53%
- Fri81°64°40%
- Sat81°66°20%
- Sun84°68°13%
- Mon86°68°6%
- Tue89°68°7%
- Wed73°59°11%
- Thu78°58°19%
- Fri80°60°15%
- Sat83°68°20%
- Sun85°70°19%
- Mon87°70°16%
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 — Algonquin
SPC includes Algonquin 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 Algonquin
- 60102