Raritan, Illinois Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Raritan weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Rain37%0.05″86°69°—
- SundayJul 5Overcast22%—84°68°-2°
- MondayJul 6Light Drizzle——82°65°-2°
- TuesdayJul 7Clear——80°62°-2°
- WednesdayJul 8Overcast——85°63°+5°
- ThursdayJul 9Thunderstorm37%—84°70°-1°
- FridayJul 10Overcast37%—81°68°-3°
AQI 24 (Good), driven by PM2.5. AQI down 7 over the last 6 hours (gradual decline). PM2.5 at 7.8 µg/m³, PM10 at 8.7 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 during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 41 now. With UV 3.1 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 12 around 1 PM.
- Present
- AQI 41
- UV peak
- 3.1 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 12
PM × Wind × Precip
PM2.5 at 7.8 µg/m³, PM10 at 8.7 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.90
- 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
- 10:58 PM
- Moonset
- 10:08 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Raritan at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: April 20 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 61471
16-Day Forecast — Raritan
- Sat86°69°37%
- Sun84°68°22%
- Mon82°65°4%
- Tue80°62°2%
- Wed85°63°9%
- Thu84°70°37%
- Fri81°68°37%
- Sat83°67°14%
- Sun69°58°9%
- Mon74°56°6%
- Tue76°60°9%
- Wed80°65°16%
- Thu81°65°16%
- Fri82°68°19%
- Sat85°70°13%
- Sun82°72°13%
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 — Raritan
SPC has placed Raritan in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
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 Raritan
- 61471