Glenham, South Dakota Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Glenham weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Partly Cloudy——89°60°—
- SundayJul 5Clear——94°62°+5°
- MondayJul 6Heavy Drizzle49%—101°68°+7°
- TuesdayJul 7Thunderstorm77%—89°64°-12°
- WednesdayJul 8Overcast77%—84°63°-5°
- ThursdayJul 9Drizzle17%0.02″79°62°-5°
- FridayJul 10Light Drizzle19%—77°59°-2°
AQI 41 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 11.5 µg/m³ (AQI 55) with a 0.82 fine-to-coarse ratio and 2 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 47 now. With UV 7.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 47 around 1 PM.
- Present
- AQI 47
- UV peak
- 7.5 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 47
PM × Wind × Precip
PM2.5 at 11.5 µg/m³ (AQI 55) with a 0.82 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.82
- 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
- 11:45 PM
- Moonset
- 10:42 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Glenham at a glance
- Today vs. normal: 19°F above the seasonal normal for this latitude
- Last frost: May 19 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 57631
16-Day Forecast — Glenham
- Sat89°60°4%
- Sun94°62°0%
- Mon101°68°49%
- Tue89°64°77%
- Wed84°63°77%
- Thu79°62°17%
- Fri77°59°19%
- Sat83°57°14%
- Sun89°62°6%
- Mon91°65°6%
- Tue100°68°10%
- Wed104°73°10%
- Thu94°71°23%
- Fri79°66°24%
- Sat86°60°16%
- Sun91°60°24%
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 — Glenham
SPC has placed Glenham in the Marginal Risk category for severe thunderstorms day after tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- 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.
ZIP codes in Glenham
- 57631