Hecla, South Dakota Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Hecla weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast——88°61°—
- SundayJul 5Mostly Clear——89°64°+1°
- MondayJul 6T-storm w/ Hail53%—94°67°+5°
- TuesdayJul 7T-storm w/ Hail68%0.79″80°65°-14°
- WednesdayJul 8Drizzle72%—78°61°-2°
- ThursdayJul 9Heavy Drizzle13%0.11″75°60°-3°
- FridayJul 10Light Drizzle19%—71°59°-4°
AQI 40 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±4 points). Ozone at AQI 44 now. With UV 5.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 30 around 1 PM.
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 44 now. With UV 5.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 30 around 1 PM.
- Present
- AQI 44
- UV peak
- 5.1 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 30
PM × Wind × Precip
PM2.5 at 6.4 µg/m³ (AQI 36) with a 0.81 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.81
- 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
- 11:37 PM
- Moonset
- 10:32 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Hecla at a glance
- Today vs. normal: 18°F above the seasonal normal for this latitude
- Last frost: May 21 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 57446
16-Day Forecast — Hecla
- Sat88°61°7%
- Sun89°64°1%
- Mon94°67°53%
- Tue80°65°68%
- Wed78°61°72%
- Thu75°60°13%
- Fri71°59°19%
- Sat78°55°17%
- Sun83°59°11%
- Mon87°61°7%
- Tue91°65°10%
- Wed94°69°10%
- Thu88°72°11%
- Fri81°62°19%
- Sat80°60°25%
- Sun86°56°16%
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 — Hecla
SPC has placed Hecla in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- 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 Hecla
- 57446