Clay County, South Dakota, United States

Last updated: 10:38 PM CDT  ·  Refresh
28°C
Feels like 29°
Clear
▲ 34°  /  ▼ 20°
Wind
7 mph S
Humidity
59%
Dew Point
20°
Pressure
28.60 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
6:04 AM
Sunset
9:03 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Clay County is currently clear at 28°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 858 J/kg) — isolated convective development possible. Sunrise: 6:04AM · Sunset: 9:03PM.

Alerts

No active alerts for this location.
49 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
28°
3%
11 PM
27°
7%
12 AM
27°
3%
1 AM
25°
3%
2 AM
24°
3%
3 AM
23°
3%
4 AM
23°
3%
5 AM
20°
3%
6 AM
20°
3%
7 AM
21°
3%
8 AM
23°
3%
9 AM
24°
3%
10 AM
26°
3%
11 AM
27°
3%
12 PM
28°
3%
1 PM
31°
3%
2 PM
32°
3%
3 PM
33°
3%
4 PM
33°
3%
5 PM
33°
3%
6 PM
32°
3%
7 PM
31°
3%
8 PM
30°
6%
9 PM
29°
6%
7-Day Forecast
Tonight
34° 20°
Clear.
Sat
34° 20°
Partly Cloudy.
Sun
37° 20°
Clear with a 35% chance of rain.
Mon
41° 22°
Mostly Clear.
Tue
30° 17°
Clear.
Wed
24° 9°
Drizzle, 51% chance.
Thu
28° 14°
Clear with a 52% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 28° Clear 3% 7 mph S 59%
11 PM 27° Clear 7% 7 mph SSW 60%
12 AM 27° Clear 3% 7 mph SSW 63%
1 AM 25° Clear 3% 5 mph SSW 66%
2 AM 24° Clear 3% 4 mph SSW 69%
3 AM 23° Clear 3% 2 mph SE 71%
4 AM 23° Clear 3% 3 mph ESE 73%
5 AM 20° Mostly Clear 3% 3 mph E 74%
6 AM 20° Partly Cloudy 3% 4 mph NE 76%
7 AM 21° Partly Cloudy 3% 7 mph ENE 73%
8 AM 23° Partly Cloudy 3% 9 mph ENE 67%
9 AM 24° Partly Cloudy 3% 11 mph ENE 61%
10 AM 26° Mostly Clear 3% 11 mph ENE 57%
11 AM 27° Mostly Clear 3% 10 mph ENE 53%
12 PM 28° Partly Cloudy 3% 10 mph ENE 50%
1 PM 31° Partly Cloudy 3% 10 mph ENE 46%
2 PM 32° Partly Cloudy 3% 10 mph ENE 43%
3 PM 33° Partly Cloudy 3% 10 mph ENE 40%
4 PM 33° Partly Cloudy 3% 10 mph ENE 39%
5 PM 33° Mostly Clear 3% 10 mph ENE 39%
6 PM 32° Mostly Clear 3% 10 mph ENE 39%
7 PM 31° Mostly Clear 3% 10 mph ENE 42%
8 PM 30° Mostly Clear 6% 10 mph ENE 48%
9 PM 29° Mostly Clear 6% 10 mph ENE 53%
15-Day Forecast
Today
7/17
Clear
3%
20°
34°
Sat
7/18
Partly Cloudy
6%
20°
34°
Sun
7/19
Clear
35%
20°
37°
Mon
7/20
Mostly Clear
10%
22°
41°
Tue
7/21
Clear
7%
17°
30°
Wed
7/22
Drizzle
51%
9°
24°
Thu
7/23
Clear
52%
14°
28°
Fri
7/24
Clear
31%
16°
29°
Sat
7/25
Drizzle
44%
13°
33°
Sun
7/26
Rain
68%
16°
33°
Mon
7/27
Rain
60%
17°
32°
Tue
7/28
Drizzle
60%
21°
36°
Wed
7/29
Drizzle
60%
20°
37°
Thu
7/30
Drizzle
60%
21°
36°
Fri
7/31
Drizzle
60%
21°
36°
49
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
35 AQI 6.3 µg/m³
O3
Ground-level ozone
Dominant
49 AQI 53 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 49 Good 49 35
Sun 40 Good 40 32
Mon 43 Good 43 24
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Sat Jul 18, 02:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE366 J/kg
MLCAPE621 J/kg
MUCAPE1181 J/kg
SBCIN-385 J/kg
MLCIN0 J/kg
Lifted Index-1.5
Kinematics
0–6 km Shear12 kt
0–1 km Shear15 kt
Eff. Shear24 kt
0–1 km SRH81
0–3 km SRH34
Eff. SRH-18
Storm Motion259° @ 19 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index32.8
Thermo & Levels
PWAT1.49 in
0–3 km LR5.9 °C/km
700–500 LR5.8 °C/km
Total Totals45.7
LCL861 hPa
LFC607 hPa
EL200 hPa
Freezing Lvl15,538 ft