Observed 12:40 PM CDT at KSUX

Jefferson, SD weather

Partly cloudy and 63°17°, jacket by 8 PM.

Forecasts agree

Now 63°17°

Partly sunny

Wind: 18 mph30 km/h; From the northwest. Easing to 5 mph8 km/h by 10 PM
Dew point: 48°9°; Comfortable
UV index: 2Low; Moderate 2–3 PM · peak 3
Air quality: 34Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.23 inHg1024 hPa; Rising · +0.06 inHg+2.2 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

8°4° cooler than this time yesterday (73°23° then, 65°18° now)

Good hours for

High 67°19° today at 2 PM
Below 60°16° tonight after 6 PM
Low 47°8° tomorrow at 8 AM
Above 60°16° tomorrow by 1 PM
Rain tomorrow night from 3 AM (60%, 0.85 in22 mm)

This afternoonNear 63°17° · rain chance 30% · Cloudy
TonightDown to 49°9° by 5 AM · rain chance 30% · Cloudy
Tomorrow morningUp to 56°13° by 11 AM · rain chance 20% · Cloudy
Tomorrow afternoonUp to 65°18° by 5 PM · Mostly cloudy
Tomorrow nightDown to 46°8° by 5 AM · Rain 3–6 AM (50%)
Monday morningUp to 54°12° by 11 AM · Rain all morning (60%)

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 12p	Partly sunny	64°18° (likely 61°16° to 66°19°)	64°18°	30%	15 mph24 km/h from WNW, gusts 22 mph36 km/h	59%	77%	2
Sat 1p	Cloudy	66°19° (likely 60°16° to 66°19°)	66°19°	10%	15 mph24 km/h from NW, gusts 24 mph39 km/h	53%	87%	2
Sat 2p	Cloudy	67°19° (likely 59°15° to 67°19°)	67°19°	5%	15 mph24 km/h from NW, gusts 24 mph38 km/h	49%	90%	3
Sat 3p	Mostly cloudy	64°18° (likely 58°14° to 64°18°)	64°18°	10%	15 mph24 km/h from NNW, gusts 24 mph38 km/h	50%	71%	2
Sat 4p	Cloudy	63°17° (likely 56°13° to 63°17°)	63°17°	10%	15 mph24 km/h from NNW, gusts 23 mph37 km/h	48%	92%	1
Sat 5p	Cloudy	62°17° (likely 54°12° to 62°17°)	62°17°	20%	15 mph24 km/h from NNW, gusts 21 mph34 km/h	49%	95%	1
Sat 6p	Cloudy	59°15° (likely 52°11° to 59°15°)	59°15°	20%	10 mph16 km/h from NNW, gusts 19 mph31 km/h	52%	98%	0
Sat 7p	Cloudy	57°14° (likely 51°11° to 57°14°)	57°14°	10%	10 mph16 km/h from NNW, gusts 17 mph27 km/h	60%	100%	0
Sat 8p	Cloudy	55°13° (likely 50°10° to 56°13°)	55°13°	20%	10 mph16 km/h from N, gusts 16 mph26 km/h	67%	100%	0
Sat 9p	Cloudy	54°12° (likely 50°10° to 56°13°)	54°12°	20%	10 mph16 km/h from N, gusts 17 mph28 km/h	69%	100%	0
Sat 10p	Cloudy	53°12° (likely 50°10° to 55°13°)	53°12°	30%	5 mph8 km/h from N, gusts 16 mph25 km/h	74%	99%	0
Sat 11p	Cloudy	52°11° (likely 50°10° to 54°12°)	52°11°	30%	5 mph8 km/h from N, gusts 14 mph22 km/h	77%	97%	0
Sun 12a	Cloudy	51°11° (likely 50°10° to 53°12°)	51°11°	30%	5 mph8 km/h from N, gusts 14 mph23 km/h	79%	90%	0
Sun 1a	Showers	51°11° (likely 49°9° to 53°12°)	51°11°	20%	5 mph8 km/h from N, gusts 13 mph22 km/h	82%	87%	0
Sun 2a	Showers	50°10° (likely 49°9° to 53°12°)	48°9°	20%	5 mph8 km/h from NNE, gusts 11 mph18 km/h	85%	73%	0
Sun 3a	Cloudy	50°10° (likely 49°9° to 52°11°)	48°9°	30%	5 mph8 km/h from NNE, gusts 11 mph17 km/h	85%	78%	0
Sun 4a	Cloudy	50°10° (likely 49°9° to 52°11°)	47°8°	30%	5 mph8 km/h from NNE, gusts 11 mph18 km/h	84%	93%	0
Sun 5a	Cloudy	49°9° (likely 48°9° to 51°11°)	47°8°	30%	5 mph8 km/h from NE, gusts 11 mph18 km/h	86%	91%	0
Sun 6a	Cloudy	48°9° (likely 48°9° to 51°11°)	46°8°	20%	5 mph8 km/h from NE, gusts 12 mph19 km/h	88%	90%	0
Sun 7a	Cloudy	48°9° (likely 48°9° to 50°10°)	46°8°	10%	5 mph8 km/h from NNE, gusts 12 mph19 km/h	88%	94%	0
Sun 8a	Cloudy	47°8° (likely 47°8° to 51°11°)	45°7°	10%	5 mph8 km/h from NE, gusts 10 mph17 km/h	91%	93%	0
Sun 9a	Cloudy	49°9° (likely 49°9° to 52°11°)	46°8°	5%	5 mph8 km/h from ENE, gusts 13 mph22 km/h	85%	90%	0
Sun 10a	Mostly cloudy	54°12° (likely 50°10° to 54°12°)	54°12°	5%	5 mph8 km/h from ENE, gusts 14 mph23 km/h	74%	87%	1
Sun 11a	Cloudy	56°13° (likely 52°11° to 57°14°)	56°13°	5%	5 mph8 km/h from NE, gusts 14 mph23 km/h	69%	83%	2
Sun 12p	Cloudy	59°15° (likely 53°12° to 60°16°)	59°15°	5%	5 mph8 km/h from NE, gusts 13 mph21 km/h	62%	75%	3
Sun 1p	Cloudy	61°16° (likely 54°12° to 62°17°)	61°16°	5%	5 mph8 km/h from NE, gusts 12 mph20 km/h	56%	74%	4
Sun 2p	Cloudy	63°17° (likely 56°13° to 64°18°)	63°17°	5%	10 mph16 km/h from NE, gusts 13 mph21 km/h	54%	68%	4
Sun 3p	Cloudy	64°18° (likely 57°14° to 65°18°)	64°18°	5%	10 mph16 km/h from NE, gusts 14 mph23 km/h	51%	72%	4
Sun 4p	Mostly cloudy	64°18° (likely 57°14° to 65°18°)	64°18°	5%	10 mph16 km/h from NE, gusts 15 mph24 km/h	49%	58%	3
Sun 5p	Mostly cloudy	65°18° (likely 57°14° to 65°18°)	65°18°	5%	10 mph16 km/h from NE, gusts 16 mph25 km/h	46%	72%	2
Sun 6p	Mostly cloudy	64°18° (likely 55°13° to 64°18°)	64°18°	5%	10 mph16 km/h from NE, gusts 16 mph26 km/h	47%	57%	1
Sun 7p	Cloudy	61°16° (likely 52°11° to 61°16°)	61°16°	10%	10 mph16 km/h from NE, gusts 19 mph30 km/h	50%	88%	0
Sun 8p	Cloudy	59°15° (likely 51°11° to 59°15°)	59°15°	10%	10 mph16 km/h from NE, gusts 20 mph33 km/h	54%	87%	0
Sun 9p	Cloudy	54°12° (likely 50°10° to 55°13°)	54°12°	5%	10 mph16 km/h from NE, gusts 21 mph33 km/h	61%	89%	0
Sun 10p	Cloudy	53°12° (likely 49°9° to 54°12°)	53°12°	10%	10 mph16 km/h from NE, gusts 20 mph32 km/h	64%	100%	0
Sun 11p	Drizzle	51°11° (likely 48°9° to 53°12°)	48°9°	20%	10 mph16 km/h from NE, gusts 22 mph36 km/h	68%	100%	0
Mon 12a	Drizzle	50°10° (likely 46°8° to 52°11°)	46°8°	20%	10 mph16 km/h from NE, gusts 23 mph36 km/h	71%	100%	0
Mon 1a	Showers	49°9° (likely 45°7° to 51°11°)	46°8°	20%, 0.1 in2.5 mm	10 mph16 km/h from NE, gusts 21 mph34 km/h	74%	100%	0
Mon 2a	Cloudy	48°9° (likely 45°7° to 51°11°)	44°7°	5%, 0.1 in2.5 mm	10 mph16 km/h from ENE, gusts 21 mph33 km/h	77%	100%	0
Mon 3a	Rain	48°9° (likely 45°7° to 50°10°)	44°7°	30%, 0.1 in2.5 mm	10 mph16 km/h from ENE, gusts 19 mph30 km/h	80%	100%	0
Mon 4a	Drizzle	47°8° (likely 45°7° to 49°9°)	43°6°	30%, 0.1 in2.5 mm	10 mph16 km/h from ENE, gusts 22 mph35 km/h	83%	100%	0
Mon 5a	Drizzle	46°8° (likely 45°7° to 49°9°)	42°6°	50%, 0.1 in2.5 mm	10 mph16 km/h from ENE, gusts 21 mph34 km/h	85%	100%	0
Mon 6a	Drizzle	46°8° (likely 45°7° to 48°9°)	41°5°	60%, 0.1 in2.5 mm	10 mph16 km/h from ENE, gusts 21 mph34 km/h	85%	100%	0
Mon 7a	Showers	46°8° (likely 45°7° to 49°9°)	40°4°	60%, 0.09 in2.3 mm	10 mph16 km/h from ENE, gusts 19 mph31 km/h	87%	100%	0
Mon 8a	Drizzle	45°7° (likely 45°7° to 49°9°)	39°4°	60%, 0.09 in2.3 mm	10 mph16 km/h from E, gusts 18 mph29 km/h	90%	100%	0
Mon 9a	Showers	47°8° (likely 47°8° to 50°10°)	42°6°	60%, 0.09 in2.3 mm	10 mph16 km/h from E, gusts 17 mph27 km/h	85%	100%	0
Mon 10a	Showers	51°11° (likely 48°9° to 52°11°)	51°11°	60%, 0.09 in2.3 mm	10 mph16 km/h from E, gusts 17 mph27 km/h	77%	99%	0
Mon 11a	Cloudy	54°12° (likely 49°9° to 55°13°)	54°12°	60%, 0.09 in2.3 mm	10 mph16 km/h from E, gusts 18 mph30 km/h	70%	99%	1

Days ahead

Tap a day for its hours and the official wording.

Today, Oct 24. Cloudy. High 69°21°, low 47°8°. Rain 0.02 in0.5 mm, 30% chance. Forecasts agree.
1. Afternoon
  noon–6 PM
  Mostly cloudy, 67°19°
  30% chance
2. Evening
  6 PM–midnight
  Cloudy, 55°13°
  30% chance
3. Overnight
  midnight–6 AM
  Cloudy, 49°9°
  30% chance
Official NWS forecast
Today: A chance of rain showers. Mostly cloudy. High near 69, with temperatures falling to around 62 in the afternoon. Northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Tonight: A chance of rain showers. Cloudy, with a low around 47. North wind 5 to 10 mph. Chance of precipitation is 30%.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
67°19°–69°21°
Low, likely
47°8°–54°12°
Wind
19 mph31 km/h, gusts 32 mph51 km/h
UV peak
4
Tomorrow, Oct 25. Drizzle. High 66°19°, low 44°7°. Rain 0.04 in1 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 59°15°
  20% chance
4. Overnight
  midnight–6 AM
  Rain, 46°8°
  50% chance · 0.5 in13 mm
Official NWS forecast
Day: A slight chance of rain showers before 7am. Mostly cloudy, with a high near 66. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.
Night: A chance of rain showers after 11pm. Mostly cloudy, with a low around 44. Northeast wind around 10 mph. Chance of precipitation is 50%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
57°14°–66°19°
Low, likely
44°7°–50°10°
Wind
13 mph21 km/h, gusts 25 mph40 km/h
UV peak
4
Monday, Oct 26. Showers. High 64°18°, low 46°8°. Rain 0.36 in9.1 mm, 70% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Showers, 45°7°
  60% chance · 0.55 in14 mm
2. Afternoon
  noon–6 PM
  Drizzle, 63°17°
  40% chance · 0.03 in0.8 mm
3. Evening
  6 PM–midnight
  Rain, 61°16°
  40% chance · 0.06 in1.4 mm
4. Overnight
  midnight–6 AM
  Cloudy, 48°9°
  40% chance
Official NWS forecast
Day: Rain showers likely. Mostly cloudy, with a high near 64. East wind around 10 mph. Chance of precipitation is 70%.
Night: Rain showers likely before 7pm, then a chance of showers and thunderstorms between 7pm and 1am. Mostly cloudy, with a low around 46. South wind around 10 mph. Chance of precipitation is 70%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
59°15°–67°19°
Low, likely
45°7°–48°9°
Wind
14 mph22 km/h, gusts 29 mph46 km/h
UV peak
3
Tuesday, Oct 27. Drizzle. High 66°19°, low 50°10°. Rain 0.04 in1 mm, 10% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 63°17°
  30% chance · 0.01 in0.4 mm
4. Overnight
  midnight–6 AM
  Cloudy, 54°12°
  30% chance · 0.02 in0.4 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 66.
Night: A slight chance of rain showers after 7pm. Partly cloudy, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–69°21°
Low, likely
43°6°–50°10°
Wind
17 mph27 km/h, gusts 32 mph52 km/h
UV peak
1
Wednesday, Oct 28. Drizzle. High 70°21°, low 47°8°. Rain 0.07 in1.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers. Mostly sunny, with a high near 70.
Night: A slight chance of rain showers before 7pm. Partly cloudy, with a low around 47.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
63°17°–72°22°
Low, likely
46°8°–53°12°
Wind
15 mph24 km/h, gusts 32 mph52 km/h
UV peak
4
Thursday, Oct 29. Mostly cloudy. High 72°22°, low 54°12°. Dry. Mostly agree. Best day outdoors this week.
1. Morning
  6 AM–noon
  Mostly sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 62°16°
  Dry
4. Overnight
  midnight–6 AM
  Drizzle, 59°15°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 72.
Night: A slight chance of rain showers after 1am. Mostly cloudy, with a low around 54.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Best day outdoors this week: the one dry, mild day the forecasts agree on (high 72°22°).
High, likely
67°19°–72°22°
Low, likely
42°6°–54°12°
Wind
15 mph24 km/h, gusts 28 mph44 km/h
UV peak
4
Friday, Oct 30. Showers. High 74°23°, low 54°12°. Rain 0.16 in4.1 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 63°17°
  30% chance · 0.06 in1.4 mm
2. Afternoon
  noon–6 PM
  Drizzle, 74°24°
  30% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Drizzle, 67°20°
  30% chance · 0.04 in0.9 mm
4. Overnight
  midnight–6 AM
  Partly cloudy, 61°16°
  40% chance · 0.06 in1.4 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain showers. Mostly cloudy, with a high near 74. Chance of precipitation is 40%.
Night: A chance of rain showers. Mostly cloudy, with a low around 54. Chance of precipitation is 50%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
72°22°–77°25°
Low, likely
53°12°–62°17°
Wind
17 mph28 km/h, gusts 36 mph58 km/h
UV peak
2
Saturday, Oct 31. Drizzle. High 64°18°, low 57°14°. Rain 0.46 in12 mm, 60% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 61°16°
  50% chance · 0.06 in1.4 mm
2. Afternoon
  noon–6 PM
  Drizzle, 63°17°
  60% chance · 0.1 in2.5 mm
3. Evening
  6 PM–midnight
  Drizzle, 61°16°
  50% chance · 0.29 in7.4 mm
4. Overnight
  midnight–6 AM
  Drizzle, 54°12°
  40% chance · 0.08 in2 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–68°20°
Low, likely
50°10°–60°16°
Wind
15 mph25 km/h, gusts 39 mph63 km/h
UV peak
2
Sunday, Nov 1. Drizzle. High 60°16°, low 47°8°. Rain 0.16 in4.1 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 51°11°
  30% chance · 0.01 in0.3 mm
2. Afternoon
  noon–6 PM
  Drizzle, 53°12°
  20% chance · 0.02 in0.5 mm
3. Evening
  6 PM–midnight
  Cloudy, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
55°13°–66°19°
Low, likely
37°3°–60°16°
Wind
18 mph29 km/h, gusts 39 mph63 km/h
UV peak
1
Monday, Nov 2. Cloudy. High 57°14°, low 45°7°. Rain 0.09 in2.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 47°9°
  20% chance · 0.02 in0.4 mm
2. Afternoon
  noon–6 PM
  Partly sunny, 58°14°
  30% chance · 0.03 in0.7 mm
3. Evening
  6 PM–midnight
  Mostly clear, 52°11°
  30% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
53°12°–65°18°
Low, likely
36°2°–59°15°
Wind
25 mph40 km/h, gusts 47 mph76 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 69°, low 47°.
Tomorrow
Dry, high 66°, low 44°, cooling off.
Monday
67% chance of rain, high 64°, low 46°.
Rest of week
Highs 57–74°; chance of precipitation on Saturday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (FSD) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Missouri River at Sioux City

11 mi

Below flood stage

Level: 10.5 ft
Flow: 25,900 cfs

Forecast peak 10.5 ft Sat 1 PM

Reading from Sat 12 PM · NWS gauge page

Big Sioux River near Jefferson

3.0 mi

Below flood stage

Level: 9.2 ft

Reading from Sat 11:30 AM · NWS gauge page

Missouri River near Ponca

6.3 mi

Below flood stage

Level: 9.7 ft

Reading from Sat 12:15 PM · NWS gauge page

Big Sioux River at Sioux City

7.0 mi

Below flood stage

Level: 9.8 ft
Flow: 738 cfs

Reading from Sat 11:30 AM · NWS gauge page

Sun & moon

Sun

Daylight: 10 h 40 min; Losing 2 min 44 s a day; shortest Dec 21, 1 h 37 min less
Golden hour: 5:50–6:47 PM; Morning 7:32–8:29 AM
Blue hour: 6:47–6:58 PM; Morning 7:21–7:32 AM; first light 7:21 AM

Stars tonight? Poor

Clouds most of the night (about 92% cover).

Moon

Waxing gibbous

97% lit · growing

Today: sets 6:04 AM · rises 5:28 PM
Full moon: Oct 25
New moon: Nov 9

Looking southwest from Jefferson.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Jefferson, SD weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Missouri River at Sioux City

Big Sioux River near Jefferson

Missouri River near Ponca

Big Sioux River at Sioux City

Sun & moon

Sun

Stars tonight? Poor

Moon