St. Lawrence, South Dakota Weather
Prairie lightning bugs rise. Day 76 of spring. Read this microseason across nine climate regions →
St. Lawrence weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Rain58%0.50″83°63°—
- ThursdayJun 4Thunderstorm40%0.11″82°63°-1°
- FridayJun 5Rain50%0.45″77°61°-5°
- SaturdayJun 6Clear——84°61°+7°
- SundayJun 7Overcast19%—87°66°+3°
- MondayJun 8Light Drizzle29%—84°63°-3°
- TuesdayJun 9Overcast22%—85°61°+1°
Ozone at AQI 44 — peak already passed at 1 PM under clear skies. AQI flat over the last 6 hours (within ±3 points). Levels should ease through evening.
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 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 44
- UV peak
- 1.0 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 44
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
- 4:47 AM
- Moonset
- 1:17 PM
- In sign
- ♑︎ Capricorn
Prairie lightning bugs rise
St. Lawrence at a glance
- Today vs. normal: 13°F above the seasonal normal for this latitude
- Last frost: May 13 (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 3, 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 — St. Lawrence
SPC has placed St. Lawrence in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWSLGTSlight Risk
- DAY 3MRGLMarginal 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.