Webster, South Dakota Weather
Prairie lightning bugs rise. Day 77 of spring. Read this microseason across nine climate regions →
Webster weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Heavy Showers60%0.75″80°63°—
- FridayJun 5Heavy Rain47%0.99″75°61°-5°
- SaturdayJun 6Clear——81°58°+6°
- SundayJun 7Thunderstorm19%—87°65°+6°
- MondayJun 8Thunderstorm35%—87°65°0°
- TuesdayJun 9Overcast15%—88°63°+1°
- WednesdayJun 10Thunderstorm19%—98°71°+10°
Ozone at AQI 42 now. AQI flat over the last 6 hours (within ±3 points). With UV 6.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 36 by mid-afternoon.
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 now. With UV 6.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 36 by mid-afternoon.
- Present
- AQI 42
- UV peak
- 6.5 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 36
PM × Wind × Precip
PM2.5/PM10 ratio 0.67 with 9 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.67
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
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
- 5:19 AM
- Moonset
- 2:15 PM
- In sign
- ♒︎ Aquarius
Prairie lightning bugs rise
Webster at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: May 18 (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 — Webster
SPC has placed Webster in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe 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.