Yankton, South Dakota

Last updated: 9:43 PM CDT  ·  Refresh
30°C
Feels like 31°
Clear
▲ 35°  /  ▼ 20°
Wind
8 mph SSW
Humidity
51%
Dew Point
19°
Pressure
28.56 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
2%
Sunrise
6:06 AM
Sunset
9:04 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Yankton is currently clear at 30°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 891 J/kg) — isolated convective development possible. Sunrise: 6:06AM · Sunset: 9:04PM.

Alerts

No active alerts for this location.
48 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
30°
3%
10 PM
28°
3%
11 PM
28°
3%
12 AM
27°
3%
1 AM
26°
3%
2 AM
24°
3%
3 AM
24°
3%
4 AM
23°
3%
5 AM
20°
3%
6 AM
20°
3%
7 AM
21°
3%
8 AM
23°
14%
9 AM
26°
10%
10 AM
27°
9%
11 AM
28°
13%
12 PM
29°
8%
1 PM
32°
8%
2 PM
33°
6%
3 PM
33°
3%
4 PM
33°
3%
5 PM
33°
3%
6 PM
33°
3%
7 PM
32°
3%
8 PM
31°
3%
7-Day Forecast
Tonight
35° 20°
Clear.
Sat
36° 20°
Partly Cloudy.
Sun
37° 19°
Partly Cloudy.
Mon
42° 23°
Clear.
Tue
32° 17°
Clear.
Wed
23° 10°
Rain, 64% chance.
Thu
28° 13°
Drizzle, 52% chance.
TimeTempConditionsPrecipWindHumidity
Now 30° Clear 3% 8 mph SSW 51%
10 PM 28° Clear 3% 7 mph SSW 53%
11 PM 28° Clear 3% 7 mph SSW 56%
12 AM 27° Clear 3% 7 mph SW 58%
1 AM 26° Clear 3% 6 mph SW 61%
2 AM 24° Clear 3% 4 mph WSW 64%
3 AM 24° Clear 3% 3 mph NW 68%
4 AM 23° Mostly Clear 3% 2 mph N 69%
5 AM 20° Partly Cloudy 3% 2 mph NE 71%
6 AM 20° Partly Cloudy 3% 3 mph NE 72%
7 AM 21° Partly Cloudy 3% 6 mph ENE 69%
8 AM 23° Partly Cloudy 14% 8 mph ENE 64%
9 AM 26° Partly Cloudy 10% 10 mph ENE 58%
10 AM 27° Partly Cloudy 9% 10 mph ENE 53%
11 AM 28° Partly Cloudy 13% 10 mph ENE 49%
12 PM 29° Partly Cloudy 8% 10 mph ENE 46%
1 PM 32° Mostly Clear 8% 10 mph ENE 43%
2 PM 33° Mostly Clear 6% 10 mph ENE 40%
3 PM 33° Mostly Clear 3% 10 mph ENE 38%
4 PM 33° Mostly Clear 3% 10 mph ENE 37%
5 PM 33° Mostly Clear 3% 11 mph ENE 36%
6 PM 33° Mostly Clear 3% 11 mph ENE 37%
7 PM 32° Mostly Clear 3% 11 mph ENE 40%
8 PM 31° Mostly Clear 3% 11 mph E 44%
15-Day Forecast
Today
7/17
Clear
3%
20°
35°
Sat
7/18
Partly Cloudy
10%
20°
36°
Sun
7/19
Partly Cloudy
12%
19°
37°
Mon
7/20
Clear
10%
23°
42°
Tue
7/21
Clear
8%
17°
32°
Wed
7/22
Rain
64%
10°
23°
Thu
7/23
Drizzle
52%
13°
28°
Fri
7/24
Clear
31%
15°
29°
Sat
7/25
Drizzle
44%
13°
33°
Sun
7/26
Drizzle
68%
17°
34°
Mon
7/27
Drizzle
60%
15°
32°
Tue
7/28
Drizzle
60%
21°
36°
Wed
7/29
Drizzle
60%
21°
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
39 AQI 7.0 µg/m³
O3
Ground-level ozone
Dominant
48 AQI 52 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 48 Good 48 39
Sun 40 Good 40 36
Mon 44 Good 44 29
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
SBCAPE484 J/kg
MLCAPE292 J/kg
MUCAPE1052 J/kg
SBCIN-331 J/kg
MLCIN0 J/kg
Lifted Index-1.9
Kinematics
0–6 km Shear13 kt
0–1 km Shear11 kt
Eff. Shear21 kt
0–1 km SRH70
0–3 km SRH-7
Eff. SRH-58
Storm Motion270° @ 19 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index34.7
Thermo & Levels
PWAT1.40 in
0–3 km LR6.8 °C/km
700–500 LR5.7 °C/km
Total Totals45.9
LCL825 hPa
LFC685 hPa
EL200 hPa
Freezing Lvl15,522 ft