Sparta, Wisconsin Weather
Prairie lightning bugs rise. Day 76 of spring. Read this microseason across nine climate regions →
Sparta weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Mostly Clear——83°44°—
- ThursdayJun 4Rain41%0.14″83°59°0°
- FridayJun 5Showers69%—79°64°-4°
- SaturdayJun 6Drizzle57%—81°61°+2°
- SundayJun 7Overcast12%—79°62°-2°
- MondayJun 8Light Drizzle31%0.05″73°62°-6°
- TuesdayJun 9Drizzle26%—77°67°+4°
Ozone at AQI 60 — peak already passed at 1 PM under clear skies. AQI up 26 in the last 6 hours — air quality is degrading. 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 60 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 60
- UV peak
- 1.0 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 60
PM × Wind × Precip
PM2.5 at 4.9 µg/m³, PM10 at 5.3 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.92
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 4:11 AM
- Moonset
- 12:46 PM
- In sign
- ♑︎ Capricorn
Prairie lightning bugs rise
Sparta at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: May 10 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 3, 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 — Sparta
SPC has placed Sparta in the Slight Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWMRGLMarginal Risk
- DAY 3SLGTSlight Risk
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.