Gregory County, South Dakota, United States

Last updated: 10:41 PM CDT  ·  Refresh
29°C
Feels like 29°
Clear
▲ 37°  /  ▼ 21°
Wind
6 mph S
Humidity
43%
Dew Point
16°
Pressure
27.87 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
4%
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 29°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1367 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
29°
3%
11 PM
28°
3%
12 AM
27°
3%
1 AM
26°
3%
2 AM
25°
5%
3 AM
24°
5%
4 AM
24°
6%
5 AM
21°
6%
6 AM
21°
6%
7 AM
21°
6%
8 AM
22°
6%
9 AM
23°
7%
10 AM
25°
7%
11 AM
27°
7%
12 PM
28°
7%
1 PM
32°
7%
2 PM
33°
7%
3 PM
33°
7%
4 PM
33°
7%
5 PM
34°
3%
6 PM
34°
3%
7 PM
33°
3%
8 PM
31°
3%
9 PM
29°
3%
7-Day Forecast
Tonight
37° 21°
Clear.
Sat
36° 21°
Mostly Clear.
Sun
39° 20°
Mostly Clear.
Mon
39° 22°
Partly Cloudy.
Tue
30° 16°
Clear with a 22% chance of rain.
Wed
27° 14°
Rain, 64% chance.
Thu
31° 15°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 29° Clear 3% 6 mph S 43%
11 PM 28° Clear 3% 2 mph S 46%
12 AM 27° Mostly Clear 3% 2 mph NE 54%
1 AM 26° Mostly Clear 3% 3 mph NNE 61%
2 AM 25° Clear 5% 4 mph NNE 67%
3 AM 24° Clear 5% 5 mph NNE 73%
4 AM 24° Mostly Clear 6% 6 mph NNE 76%
5 AM 21° Partly Cloudy 6% 6 mph NE 77%
6 AM 21° Partly Cloudy 6% 8 mph NE 78%
7 AM 21° Partly Cloudy 6% 9 mph NE 73%
8 AM 22° Partly Cloudy 6% 10 mph ENE 67%
9 AM 23° Mostly Clear 7% 11 mph ENE 62%
10 AM 25° Mostly Clear 7% 11 mph ENE 57%
11 AM 27° Mostly Clear 7% 10 mph ENE 52%
12 PM 28° Mostly Clear 7% 10 mph ENE 47%
1 PM 32° Mostly Clear 7% 10 mph ENE 43%
2 PM 33° Clear 7% 10 mph ENE 40%
3 PM 33° Clear 7% 10 mph ENE 36%
4 PM 33° Clear 7% 10 mph ENE 35%
5 PM 34° Clear 3% 10 mph ENE 34%
6 PM 34° Clear 3% 10 mph ENE 34%
7 PM 33° Clear 3% 10 mph ENE 36%
8 PM 31° Clear 3% 9 mph ENE 39%
9 PM 29° Clear 3% 9 mph ENE 43%
15-Day Forecast
Today
7/17
Clear
3%
21°
37°
Sat
7/18
Mostly Clear
7%
21°
36°
Sun
7/19
Mostly Clear
7%
20°
39°
Mon
7/20
Partly Cloudy
7%
22°
39°
Tue
7/21
Clear
22%
16°
30°
Wed
7/22
Rain
64%
14°
27°
Thu
7/23
Rain
63%
15°
31°
Fri
7/24
Clear
31%
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
Drizzle
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 LCL0°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
SBCAPE0 J/kg
MLCAPE29 J/kg
MUCAPE219 J/kg
SBCIN-4310 J/kg
MLCIN0 J/kg
Lifted Index1.0
Kinematics
0–6 km Shear15 kt
0–1 km Shear6 kt
Eff. Shear26 kt
0–1 km SRH37
0–3 km SRH-38
Eff. SRH-94
Storm Motion280° @ 17 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index37.4
Thermo & Levels
PWAT1.44 in
0–3 km LR6.9 °C/km
700–500 LR5.8 °C/km
Total Totals47.1
LCL778 hPa
LFC—
EL—
Freezing Lvl14,672 ft