Gregory County, South Dakota, United States

Last updated: 9:40 PM CDT  ·  Refresh
31°C
Feels like 31°
Clear
▲ 37°  /  ▼ 20°
Wind
6 mph SSE
Humidity
38%
Dew Point
16°
Pressure
27.85 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
6:12 AM
Sunset
9:12 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Gregory County is currently clear at 31°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1275 J/kg) — isolated convective development possible. Sunrise: 6:12AM · Sunset: 9:12PM.

Alerts

No active alerts for this location.
48 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
31°
3%
10 PM
30°
3%
11 PM
28°
3%
12 AM
27°
3%
1 AM
26°
3%
2 AM
24°
3%
3 AM
24°
3%
4 AM
24°
3%
5 AM
20°
3%
6 AM
20°
3%
7 AM
21°
3%
8 AM
22°
3%
9 AM
23°
3%
10 AM
26°
3%
11 AM
27°
3%
12 PM
28°
3%
1 PM
32°
3%
2 PM
33°
3%
3 PM
33°
3%
4 PM
33°
3%
5 PM
34°
3%
6 PM
34°
3%
7 PM
33°
3%
8 PM
32°
3%
7-Day Forecast
Tonight
37° 20°
Clear.
Sat
36° 20°
Partly Cloudy.
Sun
39° 19°
Mostly Clear.
Mon
40° 22°
Clear.
Tue
31° 17°
Clear.
Wed
27° 14°
Drizzle, 64% chance.
Thu
31° 15°
Clear with a 52% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 31° Clear 3% 6 mph SSE 38%
10 PM 30° Clear 3% 5 mph S 41%
11 PM 28° Mostly Clear 3% 3 mph S 45%
12 AM 27° Clear 3% 3 mph NE 52%
1 AM 26° Clear 3% 4 mph NNE 60%
2 AM 24° Clear 3% 4 mph NE 65%
3 AM 24° Clear 3% 5 mph NNE 70%
4 AM 24° Mostly Clear 3% 6 mph NNE 73%
5 AM 20° Partly Cloudy 3% 6 mph NE 74%
6 AM 20° Mostly Clear 3% 7 mph NE 75%
7 AM 21° Partly Cloudy 3% 9 mph NE 71%
8 AM 22° Partly Cloudy 3% 10 mph ENE 65%
9 AM 23° Mostly Clear 3% 11 mph ENE 60%
10 AM 26° Mostly Clear 3% 11 mph ENE 55%
11 AM 27° Partly Cloudy 3% 10 mph ENE 50%
12 PM 28° Partly Cloudy 3% 10 mph ENE 45%
1 PM 32° Partly Cloudy 3% 10 mph ENE 41%
2 PM 33° Partly Cloudy 3% 10 mph ENE 38%
3 PM 33° Partly Cloudy 3% 10 mph ENE 36%
4 PM 33° Partly Cloudy 3% 10 mph ENE 34%
5 PM 34° Partly Cloudy 3% 10 mph ENE 34%
6 PM 34° Partly Cloudy 3% 10 mph ENE 34%
7 PM 33° Partly Cloudy 3% 10 mph ENE 36%
8 PM 32° Partly Cloudy 3% 10 mph ENE 40%
15-Day Forecast
Today
7/17
Clear
3%
20°
37°
Sat
7/18
Partly Cloudy
3%
20°
36°
Sun
7/19
Mostly Clear
13%
19°
39°
Mon
7/20
Clear
7%
22°
40°
Tue
7/21
Clear
8%
17°
31°
Wed
7/22
Drizzle
64%
14°
27°
Thu
7/23
Clear
52%
15°
31°
Fri
7/24
Clear
63%
14°
31°
Sat
7/25
Drizzle
44%
13°
34°
Sun
7/26
Rain
68%
19°
36°
Mon
7/27
Drizzle
60%
17°
36°
Tue
7/28
Clear
60%
22°
37°
Wed
7/29
Drizzle
60%
22°
37°
Thu
7/30
Clear
60%
22°
36°
Fri
7/31
Drizzle
60%
21°
36°
48
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
42 AQI 7.6 µg/m³
O3
Ground-level ozone
Dominant
48 AQI 53 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 48 Good 48 42
Sun 40 Good 40 38
Mon 44 Good 44 38
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, 01:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE34 J/kg
MLCAPE28 J/kg
MUCAPE216 J/kg
SBCIN-381 J/kg
MLCIN0 J/kg
Lifted Index-0.3
Kinematics
0–6 km Shear18 kt
0–1 km Shear3 kt
Eff. Shear26 kt
0–1 km SRH20
0–3 km SRH-28
Eff. SRH-64
Storm Motion275° @ 17 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index37.0
Thermo & Levels
PWAT1.33 in
0–3 km LR7.5 °C/km
700–500 LR5.9 °C/km
Total Totals46.9
LCL758 hPa
LFC635 hPa
EL252 hPa
Freezing Lvl14,587 ft