Egan, South Dakota Weather
Prairie lightning bugs rise. Day 78 of spring. Read this microseason across nine climate regions →
Egan weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Thunderstorm42%—80°62°—
- FridayJun 5Overcast16%—84°63°+4°
- SaturdayJun 6Clear——91°60°+7°
- SundayJun 7Overcast31%—87°65°-4°
- MondayJun 8Overcast31%—88°66°+1°
- TuesdayJun 9Thunderstorm25%0.13″89°64°+1°
- WednesdayJun 10Thunderstorm21%—97°72°+8°
AQI 47 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±4 points). PM2.5 at 5.9 µg/m³ (AQI 33) with a 0.94 fine-to-coarse ratio and 5 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 32 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 5 by mid-afternoon.
- Present
- AQI 32
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 5
PM × Wind × Precip
PM2.5 at 5.9 µg/m³ (AQI 33) with a 0.94 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.94
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 5:39 AM
- Moonset
- 3:24 PM
- In sign
- ♒︎ Aquarius
Prairie lightning bugs rise
Egan at a glance
- Today vs. normal: 69°F — typical for the season
- 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 5, 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 — Egan
SPC has placed Egan 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.