McLaughlin, South Dakota Weather
Great rains sometimes fall. Day 43 of summer. Read this microseason across nine climate regions →
McLaughlin weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayAug 2Overcast——100°68°—
- MondayAug 3Overcast——86°65°-14°
- TuesdayAug 4Overcast——82°56°-4°
- WednesdayAug 5Overcast——86°59°+4°
- ThursdayAug 6Overcast——97°64°+11°
- FridayAug 7Partly Cloudy——105°68°+8°
- SaturdayAug 8Overcast——100°64°-5°
AQI 30 (Good), driven by Ozone. AQI down 5 over the last 6 hours (gradual decline). Ozone at AQI 30 now. With UV 5.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 20.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 30 now. With UV 5.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 20.
- Present
- AQI 30
- UV peak
- 5.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 20
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).
Red sky at night, sailor's delight.
- Moonrise
- 9:29 PM
- Moonset
- 9:52 AM
- In sign
- ♓︎ Pisces
Great rains sometimes fall
McLaughlin at a glance
- Today vs. normal: 24°F above the seasonal normal for this latitude
- Last frost: May 21 (climatological average for this latitude)
- Microseason: Aug 1–5
- Planting window: Sow fall peas. Start kale and collard seedlings for fall.
ZIP code: 57642
16-Day Forecast — McLaughlin
- Sun100°68°3%
- Mon86°65°6%
- Tue82°56°3%
- Wed86°59°2%
- Thu97°64°2%
- Fri105°68°2%
- Sat100°64°4%
- Sun90°61°11%
- Mon91°62°28%
- Tue92°65°27%
- Wed92°65°30%
- Thu94°67°18%
- Fri78°63°26%
- Sat86°58°13%
- Sun89°63°23%
- Mon99°68°16%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of August 2, 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 — McLaughlin
SPC includes McLaughlin in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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.
Sun & seasons in McLaughlin
McLaughlin sits in Corson County, where the year’s longest day runs 15h 44m of daylight and its shortest just 8h 40m — a swing of +7h 4m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Sioux Falls, the state’s largest city, lies about 255 miles to the SE. The nearest town McLaughlin tracks is Blumengard Colony, roughly 89 miles to the ESE.
ZIP codes in McLaughlin
- 57642