Princeton, Indiana Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Princeton weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Heavy Rain14%0.78″90°71°—
- SundayJul 5Overcast29%—86°73°-4°
- MondayJul 6Light Drizzle11%—80°68°-6°
- TuesdayJul 7Mostly Clear10%—81°64°+1°
- WednesdayJul 8Mostly Clear10%—84°64°+3°
- ThursdayJul 9Overcast30%—89°69°+5°
- FridayJul 10Light Drizzle45%—89°76°0°
AQI 44 (Good), driven by Ozone. Ozone at AQI 86 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
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 86 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 86
- UV peak
- 6.0 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 86
PM × Wind × Precip
PM2.5 at 7.1 µg/m³, PM10 at 7.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.91
- Wind
- light
- Recent rain
- 1h 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
- 10:43 PM
- Moonset
- 9:58 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Princeton at a glance
- Today vs. normal: 16°F above the seasonal normal for this latitude
- Last frost: April 6 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 47670
16-Day Forecast — Princeton
- Sat89°71°14%
- Sun86°72°29%
- Mon80°68°11%
- Tue81°64°10%
- Wed84°64°10%
- Thu89°69°30%
- Fri89°76°45%
- Sat82°66°34%
- Sun77°59°17%
- Mon75°57°7%
- Tue77°59°12%
- Wed80°57°19%
- Thu84°64°17%
- Fri86°67°27%
- Sat79°69°35%
- Sun75°66°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 — Princeton
SPC has placed Princeton in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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 Princeton
- 47670