Princeton, Wisconsin Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Princeton weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast10%—81°68°—
- SundayJul 5Overcast——80°64°-1°
- MondayJul 6Clear——78°59°-2°
- TuesdayJul 7Overcast——82°59°+4°
- WednesdayJul 8Thunderstorm50%0.04″78°67°-4°
- ThursdayJul 9Light Drizzle53%0.01″74°65°-4°
- FridayJul 10Light Drizzle17%—77°60°+3°
AQI 31 (Good), driven by Ozone. AQI up 6 over the last 6 hours (gradual rise). Ozone at AQI 41 — peak already passed at 1 PM under overcast 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 41 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
- Present
- AQI 41
- UV peak
- 3.3 at earlier today
- Sky at peak
- overcast
- Projected peak
- AQI 41
PM × Wind × Precip
PM2.5 at 4.6 µg/m³, PM10 at 5.5 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.84
- 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
- 10:56 PM
- Moonset
- 9:58 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Princeton at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: May 9 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 54968
16-Day Forecast — Princeton
- Sat81°68°10%
- Sun80°65°4%
- Mon78°59°1%
- Tue82°59°3%
- Wed78°67°50%
- Thu74°65°53%
- Fri77°60°17%
- Sat77°58°10%
- Sun77°54°10%
- Mon75°53°10%
- Tue82°59°8%
- Wed79°64°20%
- Thu82°62°19%
- Fri82°64°19%
- Sat72°60°26%
- Sun77°52°20%
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 includes Princeton 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 Princeton
- 54968