Harvard, Illinois Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Harvard weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——78°63°—
- MondayJul 6Partly Cloudy——81°62°+3°
- TuesdayJul 7Overcast——82°60°+1°
- WednesdayJul 8Light Drizzle24%—83°66°+1°
- ThursdayJul 9Thunderstorm52%—80°66°-3°
- FridayJul 10Overcast32%—77°61°-3°
- SaturdayJul 11Light Drizzle19%—79°63°+2°
AQI 25 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 43. Overcast through the UV peak window (cloud cover ~64%) — afternoon ozone should stay flat.
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 ~64%) — afternoon ozone should stay flat.
- Present
- AQI 43
- UV peak
- 6.6 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 19
PM × Wind × Precip
PM2.5 at 5.0 µg/m³, PM10 at 5.5 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.91
- Wind
- breezy
- 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
- 11:14 PM
- Moonset
- 11:06 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Harvard at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: May 1 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 60033
16-Day Forecast — Harvard
- Sun78°63°7%
- Mon81°62°1%
- Tue82°60°0%
- Wed83°66°24%
- Thu80°66°52%
- Fri77°61°32%
- Sat79°63°19%
- Sun83°63°10%
- Mon75°57°5%
- Tue74°55°7%
- Wed77°57°14%
- Thu80°61°26%
- Fri82°64°31%
- Sat85°67°32%
- Sun86°65°21%
- Mon84°68°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 — Harvard
SPC includes Harvard 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 Harvard
- 60033