Alpena, South Dakota Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Alpena weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast11%—89°62°—
- SundayJul 5Clear——90°66°+1°
- MondayJul 6Heavy Drizzle37%—96°67°+6°
- TuesdayJul 7Light Showers41%0.04″99°69°+3°
- WednesdayJul 8Showers68%0.16″83°68°-16°
- ThursdayJul 9Drizzle13%0.06″82°62°-1°
- FridayJul 10Mostly Clear17%—81°62°-1°
AQI 54 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 16.0 µg/m³ (AQI 64) with a 0.72 fine-to-coarse ratio and 1 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 48 now. With UV 6.9 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 31 around 1 PM.
- Present
- AQI 48
- UV peak
- 6.9 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 31
PM × Wind × Precip
PM2.5 at 16.0 µg/m³ (AQI 64) with a 0.72 fine-to-coarse ratio and 1 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
- 11:35 PM
- Moonset
- 10:36 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Alpena at a glance
- Today vs. normal: 18°F above the seasonal normal for this latitude
- Last frost: May 11 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 57312
16-Day Forecast — Alpena
- Sat89°62°11%
- Sun90°66°6%
- Mon96°67°37%
- Tue99°69°41%
- Wed83°68°68%
- Thu82°62°13%
- Fri81°62°17%
- Sat84°57°17%
- Sun89°61°8%
- Mon90°64°6%
- Tue95°64°10%
- Wed101°71°14%
- Thu93°75°10%
- Fri83°66°16%
- Sat82°61°16%
- Sun90°57°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 — Alpena
SPC has placed Alpena 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 Alpena
- 57312