Grand Marsh, Wisconsin Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Grand Marsh weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Light Rain33%0.09″85°55°—
- FridayJun 5Heavy Showers70%1.4″81°66°-4°
- SaturdayJun 6Drizzle50%—83°63°+2°
- SundayJun 7Foggy——79°60°-4°
- MondayJun 8Drizzle42%0.01″77°63°-2°
- TuesdayJun 9Drizzle35%0.10″80°68°+3°
- WednesdayJun 10Light Drizzle27%—77°67°-3°
PM2.5 at 8.3 µg/m³, PM10 at 9.2 µg/m³ — typical background levels with no transport signature. AQI down 21 over the last 6 hours — air quality is improving sharply.
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 40 now. With UV 3.3 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 13 by mid-afternoon.
- Present
- AQI 40
- UV peak
- 3.3 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 13
PM × Wind × Precip
PM2.5 at 8.3 µg/m³, PM10 at 9.2 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.90
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 4:42 AM
- Moonset
- 1:48 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Grand Marsh at a glance
- Today vs. normal: 12°F below the seasonal normal for this latitude
- Last frost: May 9 (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 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 — Grand Marsh
SPC has placed Grand Marsh in the Marginal Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3MRGLMarginal Risk
Isolated severe storms possible. Limited threat for hail or damaging wind.
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.