Madison, South Dakota Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Madison weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Foggy11%—85°64°—
- SundayJul 5Overcast——87°65°+2°
- MondayJul 6Overcast11%—89°65°+2°
- TuesdayJul 7Overcast32%—92°69°+3°
- WednesdayJul 8Light Showers52%—83°66°-9°
- ThursdayJul 9Light Drizzle18%0.01″81°60°-2°
- FridayJul 10Heavy Drizzle13%0.07″90°64°+9°
AQI 45 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 11.0 µg/m³ (AQI 55) with a 0.72 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
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 39 now. With UV 4.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 24 around 1 PM.
- Present
- AQI 39
- UV peak
- 4.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 24
PM × Wind × Precip
PM2.5 at 11.0 µg/m³ (AQI 55) with a 0.72 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.72
- Wind
- calm
- 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
- 11:30 PM
- Moonset
- 10:30 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Madison at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: May 10 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 57042
16-Day Forecast — Madison
- Sat85°64°11%
- Sun87°65°7%
- Mon89°65°11%
- Tue92°69°32%
- Wed83°66°52%
- Thu81°60°18%
- Fri90°64°13%
- Sat84°59°13%
- Sun80°54°11%
- Mon90°58°6%
- Tue97°68°6%
- Wed87°63°10%
- Thu92°61°11%
- Fri96°68°13%
- Sat96°69°13%
- Sun102°72°17%
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 — Madison
SPC has placed Madison in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
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.
ZIP codes in Madison
- 57042