Allen, South Dakota Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Allen weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Partly Cloudy10%—86°58°—
- SundayJul 5Clear——93°65°+7°
- MondayJul 6Light Rain27%0.08″101°69°+8°
- TuesdayJul 7Light Drizzle69%—100°69°-1°
- WednesdayJul 8Light Drizzle69%—82°65°-18°
- ThursdayJul 9Light Drizzle28%—87°64°+5°
- FridayJul 10Clear25%—83°62°-4°
AQI 60 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±4 points). PM2.5 at 17.4 µg/m³ (AQI 66) with a 0.71 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 61 now. With UV 6.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 49 around 1 PM.
- Present
- AQI 61
- UV peak
- 6.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 49
PM × Wind × Precip
PM2.5 at 17.4 µg/m³ (AQI 66) with a 0.71 fine-to-coarse ratio and 1 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.71
- 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
- 10:48 PM
- Moonset
- 9:52 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Allen at a glance
- Today vs. normal: 14°F above the seasonal normal for this latitude
- Last frost: May 6 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 57714
16-Day Forecast — Allen
- Sat86°58°10%
- Sun93°65°1%
- Mon101°69°27%
- Tue100°69°69%
- Wed82°65°69%
- Thu87°64°28%
- Fri83°62°25%
- Sat87°59°12%
- Sun95°64°5%
- Mon96°68°8%
- Tue100°72°16%
- Wed107°73°16%
- Thu90°72°26%
- Fri88°67°23%
- Sat83°57°25%
- Sun89°60°26%
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 — Allen
SPC has placed Allen 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 Allen
- 57714