Oconomowoc, Wisconsin Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Oconomowoc weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle55%0.01″80°67°—
- SundayJul 5Overcast——81°65°+1°
- MondayJul 6Overcast——78°60°-3°
- TuesdayJul 7Overcast——80°56°+2°
- WednesdayJul 8Thunderstorm39%0.01″80°62°0°
- ThursdayJul 9Showers50%—75°64°-5°
- FridayJul 10Drizzle15%—78°59°+3°
AQI 39 (Good), driven by Ozone. AQI up 8 over the last 6 hours (gradual rise). Ozone at AQI 45 — 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 45 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
- Present
- AQI 45
- UV peak
- 1.7 at earlier today
- Sky at peak
- overcast
- Projected peak
- AQI 45
PM × Wind × Precip
PM2.5 at 6.2 µg/m³, PM10 at 7.0 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.89
- 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
- 10:53 PM
- Moonset
- 9:56 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Oconomowoc at a glance
- Today vs. normal: 7°F above the seasonal normal for this latitude
- Last frost: May 5 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 53066
16-Day Forecast — Oconomowoc
- Sat80°68°55%
- Sun81°65°5%
- Mon78°60°1%
- Tue80°56°2%
- Wed80°62°39%
- Thu75°64°50%
- Fri78°59°15%
- Sat75°57°9%
- Sun75°55°8%
- Mon73°53°9%
- Tue78°56°10%
- Wed77°62°33%
- Thu81°62°29%
- Fri77°68°19%
- Sat75°59°27%
- Sun74°54°33%
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 — Oconomowoc
SPC includes Oconomowoc in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- 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 Oconomowoc
- 53066