Yankton, South Dakota

Last updated: 10:38 PM CDT  ·  Refresh
28°C
Feels like 29°
Clear
▲ 35°  /  ▼ 20°
Wind
7 mph SSW
Humidity
55%
Dew Point
19°
Pressure
28.57 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
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 29°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 978 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
28°
3%
11 PM
28°
3%
12 AM
27°
3%
1 AM
26°
3%
2 AM
25°
3%
3 AM
24°
3%
4 AM
23°
3%
5 AM
20°
3%
6 AM
20°
3%
7 AM
21°
3%
8 AM
23°
3%
9 AM
25°
3%
10 AM
27°
3%
11 AM
28°
3%
12 PM
29°
3%
1 PM
32°
3%
2 PM
33°
3%
3 PM
33°
3%
4 PM
33°
3%
5 PM
33°
3%
6 PM
33°
3%
7 PM
32°
3%
8 PM
31°
3%
9 PM
29°
3%
7-Day Forecast
Tonight
35° 20°
Clear.
Sat
36° 20°
Mostly Clear.
Sun
38° 19°
Clear.
Mon
41° 23°
Partly Cloudy.
Tue
30° 17°
Clear.
Wed
23° 11°
Drizzle, 51% chance.
Thu
28° 13°
Clear with a 52% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 28° Clear 3% 7 mph SSW 55%
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 62%
2 AM 25° Clear 3% 4 mph WSW 65%
3 AM 24° Clear 3% 3 mph WSW 68%
4 AM 23° Clear 3% 2 mph WSW 71%
5 AM 20° Mostly Clear 3% 2 mph E 72%
6 AM 20° Mostly Clear 3% 2 mph NE 73%
7 AM 21° Partly Cloudy 3% 5 mph ENE 71%
8 AM 23° Partly Cloudy 3% 8 mph ENE 65%
9 AM 25° Mostly Clear 3% 10 mph ENE 59%
10 AM 27° Clear 3% 10 mph ENE 54%
11 AM 28° Mostly Clear 3% 10 mph ENE 50%
12 PM 29° Mostly Clear 3% 10 mph ENE 46%
1 PM 32° Partly Cloudy 3% 10 mph ENE 44%
2 PM 33° Partly Cloudy 3% 10 mph ENE 41%
3 PM 33° Mostly Clear 3% 10 mph ENE 39%
4 PM 33° Mostly Clear 3% 10 mph ENE 38%
5 PM 33° Mostly Clear 3% 10 mph ENE 38%
6 PM 33° Mostly Clear 3% 11 mph ENE 38%
7 PM 32° Mostly Clear 3% 11 mph ENE 40%
8 PM 31° Mostly Clear 3% 10 mph ENE 45%
9 PM 29° Mostly Clear 3% 10 mph E 49%
15-Day Forecast
Today
7/17
Clear
3%
20°
35°
Sat
7/18
Mostly Clear
3%
20°
36°
Sun
7/19
Clear
3%
19°
38°
Mon
7/20
Partly Cloudy
18%
23°
41°
Tue
7/21
Clear
7%
17°
30°
Wed
7/22
Drizzle
51%
11°
23°
Thu
7/23
Clear
52%
13°
28°
Fri
7/24
Clear
31%
15°
29°
Sat
7/25
Drizzle
44%
13°
33°
Sun
7/26
Rain
68%
17°
34°
Mon
7/27
Drizzle
60%
16°
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, 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
SBCAPE386 J/kg
MLCAPE403 J/kg
MUCAPE1099 J/kg
SBCIN-390 J/kg
MLCIN0 J/kg
Lifted Index-1.7
Kinematics
0–6 km Shear12 kt
0–1 km Shear14 kt
Eff. Shear23 kt
0–1 km SRH80
0–3 km SRH12
Eff. SRH-44
Storm Motion265° @ 18 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index31.3
Thermo & Levels
PWAT1.44 in
0–3 km LR6.1 °C/km
700–500 LR5.9 °C/km
Total Totals45.3
LCL847 hPa
LFC613 hPa
EL201 hPa
Freezing Lvl15,522 ft