Watertown, Wisconsin Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Watertown weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle49%—82°69°—
- SundayJul 5Overcast——82°65°0°
- MondayJul 6Overcast——78°61°-4°
- TuesdayJul 7Overcast——80°55°+2°
- WednesdayJul 8Thunderstorm40%0.13″81°63°+1°
- ThursdayJul 9Showers48%—75°64°-6°
- FridayJul 10Light Drizzle14%—77°59°+2°
AQI 36 (Good), driven by Ozone. AQI up 9 over the last 6 hours (gradual rise). Ozone at AQI 42 — 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 42 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
- Present
- AQI 42
- UV peak
- 1.6 at earlier today
- Sky at peak
- overcast
- Projected peak
- AQI 42
PM × Wind × Precip
PM2.5 at 5.8 µg/m³ (AQI 32) with a 0.83 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.83
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 10:54 PM
- Moonset
- 9:57 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Watertown at a glance
- Today vs. normal: 12°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 codes: 53094, 53098
16-Day Forecast — Watertown
- Sat82°69°49%
- Sun82°65°5%
- Mon78°61°1%
- Tue80°55°2%
- Wed81°63°40%
- Thu75°64°48%
- Fri77°59°14%
- Sat75°58°10%
- Sun75°54°8%
- Mon73°53°8%
- Tue78°56°9%
- Wed77°62°33%
- Thu81°62°29%
- Fri77°67°19%
- Sat74°60°27%
- Sun73°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 — Watertown
SPC includes Watertown 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 Watertown
- 53098
- 53094