Observed 6:55 AM MDT at KRCA

Johnson Siding, SD weather

Windy and 39°4°.

Forecasts differ

Now 39°4°

Windy · Feels like 28°−2°

Feels like: 28°−2°; Wind chill from 25 mph41 km/h wind · air 39°4°
Wind: 25 mph41 km/hgusts 34 mph55 km/h; From the northwest. Easing to 6 mph10 km/h by 9 AM
Dew point: 30°−1°; Dry · down to 20°−7° by 10 AM
UV index: 0Low; Moderate 11 AM–4 PM · peak 4
Air quality: 26Good; Main pollutant: PM10 (dust)

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

18°10° cooler than this time yesterday (57°14° then, 39°4° now)

Good hours for

Gusts to 29 mph47 km/h until 9 AM
Below freezing tonight 3–9 AM (low 29°−2°)
Rain tomorrow noon–Monday 6 AM (90%, 0.54 in14 mm)
Below freezing tomorrow night from 11 PM (low 30°−1°)
Snow Monday from 6 AM (60%, < 1 in< 3 cm)

This morningUp to 49°9° by 11 AM · gusts to 29 mph47 km/h · Clear
This afternoonNear 48°9° · Clear
TonightDown to 31°−1° by 5 AM · freezing, low 31°−1° · Mostly cloudy
Tomorrow morningUp to 39°4° by 11 AM · rain chance 30% · freezing, low 29°−2° · Cloudy
Tomorrow afternoonNear 39°4° · Rain all afternoon (70%)
Tomorrow nightDown to 30°−1° by 4 AM · Rain all night (90%) · freezing, low 30°−1°

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 8a	Partly sunny	34°1° (likely 34°1° to 38°3°)	28°−2°	0%	6 mph10 km/h from NW, gusts 29 mph47 km/h	67%	21%	0
Sat 9a	Sunny	38°3° (likely 37°3° to 40°4°)	33°1°	0%	6 mph10 km/h from NW, gusts 24 mph38 km/h	57%	11%	1
Sat 10a	Sunny	45°7° (likely 41°5° to 45°7°)	42°6°	0%	6 mph10 km/h from NW, gusts 20 mph32 km/h	37%	1%	2
Sat 11a	Sunny	49°9° (likely 44°7° to 49°9°)	46°8°	0%	6 mph10 km/h from NW, gusts 16 mph26 km/h	28%	7%	3
Sat 12p	Sunny	49°9° (likely 47°8° to 49°9°)	47°8°	0%	5 mph8 km/h from N, gusts 14 mph22 km/h	24%	0%	4
Sat 1p	Sunny	48°9° (likely 48°9° to 51°11°)	46°8°	0%	5 mph8 km/h from N, gusts 11 mph18 km/h	23%	6%	4
Sat 2p	Sunny	50°10° (likely 49°9° to 51°11°)	48°9°	0%	5 mph8 km/h from N, gusts 10 mph16 km/h	21%	3%	4
Sat 3p	Sunny	50°10° (likely 48°9° to 50°10°)	48°9°	0%	5 mph8 km/h from N, gusts 12 mph19 km/h	21%	19%	3
Sat 4p	Sunny	49°9° (likely 47°8° to 49°9°)	47°8°	0%	5 mph8 km/h from NE, gusts 10 mph17 km/h	22%	27%	2
Sat 5p	Partly sunny	46°8° (likely 44°7° to 46°8°)	45°7°	0%	3 mph5 km/h from NE, gusts 10 mph15 km/h	25%	60%	1
Sat 6p	Clear	41°5° (likely 40°4° to 44°7°)	41°5°	0%	2 mph3 km/h from E, gusts 8 mph13 km/h	31%	45%	0
Sat 7p	Clear	39°4° (likely 39°4° to 41°5°)	39°4°	0%	1 mph2 km/h from E, gusts 9 mph14 km/h	35%	46%	0
Sat 8p	Mostly cloudy	37°3° (likely 37°3° to 40°4°)	37°3°	0%	1 mph2 km/h from SE, gusts 10 mph16 km/h	40%	48%	0
Sat 9p	Cloudy	36°2° (likely 36°2° to 39°4°)	36°2°	0%	1 mph2 km/h from S, gusts 10 mph16 km/h	42%	79%	0
Sat 10p	Mostly cloudy	35°2° (likely 35°2° to 38°3°)	35°2°	0%	1 mph2 km/h from S, gusts 10 mph15 km/h	43%	63%	0
Sat 11p	Clear	35°2° (likely 35°2° to 37°3°)	35°2°	0%	1 mph2 km/h from S, gusts 9 mph15 km/h	43%	39%	0
Sun 12a	Clear	34°1° (likely 34°1° to 37°3°)	34°1°	10%	1 mph2 km/h from S, gusts 8 mph13 km/h	47%	41%	0
Sun 1a	Clear	33°1° (likely 33°1° to 37°3°)	33°1°	10%	1 mph2 km/h from S, gusts 8 mph12 km/h	49%	45%	0
Sun 2a	Cloudy	33°1° (likely 33°1° to 38°3°)	33°1°	10%	1 mph2 km/h from S, gusts 8 mph13 km/h	51%	71%	0
Sun 3a	Cloudy	32°0° (likely 32°0° to 39°4°)	32°0°	10%	1 mph2 km/h from S, gusts 9 mph14 km/h	56%	80%	0
Sun 4a	Cloudy	32°0° (likely 32°0° to 40°4°)	32°0°	10%	1 mph2 km/h from S, gusts 13 mph20 km/h	58%	85%	0
Sun 5a	Cloudy	31°−1° (likely 31°−1° to 40°4°)	31°−1°	10%	1 mph2 km/h from S, gusts 11 mph18 km/h	63%	91%	0
Sun 6a	Cloudy	29°−2° (likely 29°−2° to 39°4°)	29°−2°	30%	2 mph3 km/h from SE, gusts 12 mph19 km/h	72%	93%	0
Sun 7a	Cloudy	29°−2° (likely 29°−2° to 40°4°)	29°−2°	30%	2 mph3 km/h from SE, gusts 12 mph20 km/h	78%	96%	0
Sun 8a	Cloudy	30°−1° (likely 30°−1° to 40°4°)	30°−1°	30%	2 mph3 km/h from SE, gusts 12 mph20 km/h	78%	98%	0
Sun 9a	Cloudy	34°1° (likely 34°1° to 41°5°)	34°1°	30%	2 mph3 km/h from SE, gusts 10 mph17 km/h	78%	99%	0
Sun 10a	Cloudy	38°3° (likely 36°2° to 41°5°)	36°2°	30%	3 mph5 km/h from SE, gusts 9 mph15 km/h	76%	100%	1
Sun 11a	Cloudy	39°4° (likely 36°2° to 41°5°)	37°3°	30%	3 mph5 km/h from SE, gusts 10 mph16 km/h	76%	100%	1
Sun 12p	Cloudy	39°4° (likely 35°2° to 41°5°)	37°3°	70%, 0.07 in1.8 mm	3 mph5 km/h from E, gusts 11 mph17 km/h	76%	100%	0
Sun 1p	Rain	40°4° (likely 35°2° to 40°4°)	38°3°	70%, 0.07 in1.8 mm	3 mph5 km/h from E, gusts 11 mph18 km/h	76%	100%	0
Sun 2p	Cloudy	41°5° (likely 34°1° to 41°5°)	39°4°	70%, 0.07 in1.8 mm	3 mph5 km/h from E, gusts 10 mph16 km/h	73%	100%	2
Sun 3p	Cloudy	41°5° (likely 34°1° to 41°5°)	39°4°	70%, 0.07 in1.8 mm	3 mph5 km/h from E, gusts 11 mph17 km/h	73%	100%	1
Sun 4p	Drizzle	40°4° (likely 34°1° to 40°4°)	38°3°	70%, 0.07 in1.8 mm	3 mph5 km/h from E, gusts 10 mph16 km/h	76%	100%	0
Sun 5p	Snow	38°3° (likely 34°1° to 38°3°)	38°3°	70%, 0.07 in1.8 mm	2 mph3 km/h from E, gusts 10 mph16 km/h	79%	100%	0
Sun 6p	Drizzle	35°2° (likely 34°1° to 37°3°)	35°2°	90%, 0.01 in0.3 mm	2 mph3 km/h from E, gusts 10 mph15 km/h	89%	100%	0
Sun 7p	Drizzle	33°1° (likely 33°1° to 36°2°)	33°1°	90%, 0.01 in0.3 mm	2 mph3 km/h from E, gusts 9 mph14 km/h	100%	100%	0
Sun 8p	Snow	33°1° (likely 33°1° to 36°2°)	33°1°	90%, 0.01 in0.3 mm	2 mph3 km/h from E, gusts 9 mph15 km/h	100%	100%	0
Sun 9p	Snow	33°1° (likely 33°1° to 35°2°)	33°1°	90%, 0.01 in0.3 mm	2 mph3 km/h from E, gusts 10 mph16 km/h	100%	100%	0
Sun 10p	Fog	33°1° (likely 33°1° to 35°2°)	33°1°	90%, 0.01 in0.3 mm	1 mph2 km/h from E, gusts 9 mph15 km/h	100%	100%	0
Sun 11p	Fog	32°0° (likely 32°0° to 35°2°)	32°0°	90%, 0.01 in0.3 mm	1 mph2 km/h from E, gusts 9 mph14 km/h	100%	100%	0
Mon 12a	Snow	32°0° (likely 32°0° to 35°2°)	32°0°	70%, 0.01 in0.3 mm	1 mph2 km/h from E, gusts 8 mph13 km/h	100%	100%	0
Mon 1a	Snow	32°0° (likely 32°0° to 35°2°)	32°0°	70%, 0.01 in0.3 mm	0 mph0 km/h, gusts 8 mph12 km/h	96%	100%	0
Mon 2a	Snow	31°−1° (likely 31°−1° to 35°2°)	31°−1°	70%, 0.01 in0.3 mm	0 mph0 km/h, gusts 8 mph13 km/h	100%	100%	0
Mon 3a	Fog	31°−1° (likely 31°−1° to 35°2°)	31°−1°	70%, 0.01 in0.3 mm	0 mph0 km/h, gusts 7 mph11 km/h	96%	99%	0
Mon 4a	Snow	30°−1° (likely 30°−1° to 34°1°)	30°−1°	70%, 0.01 in0.3 mm	0 mph0 km/h, gusts 7 mph11 km/h	96%	99%	0
Mon 5a	Snow	30°−1° (likely 30°−1° to 34°1°)	30°−1°	70%, 0.01 in0.3 mm	0 mph0 km/h, gusts 7 mph11 km/h	88%	100%	0
Mon 6a	Snow	30°−1° (likely 30°−1° to 34°1°)	30°−1°	60%, snow 0.1 in0.3 cm	1 mph2 km/h from E, gusts 7 mph11 km/h	88%	98%	0
Mon 7a	Snow	30°−1° (likely 30°−1° to 34°1°)	30°−1°	60%, snow 0.1 in0.3 cm	1 mph2 km/h from E, gusts 6 mph10 km/h	92%	99%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Cloudy. High 51°11°, low 28°−2°. Typical 55°13° / 35°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 50°10°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 37°3°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 31°−1°
  Dry
Official NWS forecast
Today: Sunny. High near 51, with temperatures falling to around 46 in the afternoon. North wind around 6 mph, with gusts as high as 24 mph.
Tonight: Mostly cloudy. Low around 28, with temperatures rising to around 31 overnight. South wind around 2 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
50°10°–57°14°
Low, likely
28°−2°–37°3°
Typical high / low
55°13° / 35°2°
Wind
20 mph32 km/h, gusts 46 mph75 km/h
UV peak
4
Tomorrow, Oct 25. Snow. High 42°6°, low 29°−2°. Typical 55°13° / 34°1°. Snow 0.11 in2.8 mm, 70% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 30°−1°
  30% chance
2. Afternoon
  noon–6 PM
  Snow, 41°5°
  70% chance · 0.42 in11 mm
3. Evening
  6 PM–midnight
  Snow, 33°1°
  90% chance · 0.06 in1.5 mm
4. Overnight
  midnight–6 AM
  Snow, 30°−1°
  70% chance · 0.06 in1.5 mm
Official NWS forecast
Day: A chance of snow before 9am, then rain and snow likely. Cloudy. High near 42, with temperatures falling to around 38 in the afternoon. Southeast wind around 3 mph. Chance of precipitation is 70%.
Night: Rain and snow before 7pm, then rain and snow. Cloudy, with a low around 29. East wind around 2 mph. Chance of precipitation is 90%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
39°4°–42°6°
Low, likely
29°−2°–35°2°
Typical high / low
55°13° / 34°1°
Wind
7 mph11 km/h, gusts 17 mph27 km/h
UV peak
2
Monday, Oct 26. Snow. High 39°4°, low 30°−1°. Typical 55°13° / 34°1°. Snow 0–4 in0–10 cm, 60% chance. Forecasts agree.
1. Morning
  6 AM–noon
  Heavy snow, 33°1°
  80% chance · 1 in2.5 cm
2. Afternoon
  noon–6 PM
  Snow, 34°1°
  70% chance · 0.5 in1.4 cm
3. Evening
  6 PM–midnight
  Fog, 31°0°
  40% chance
4. Overnight
  midnight–6 AM
  Cloudy, 31°−1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Snow likely before 10am, then rain and snow likely. Cloudy. High near 39, with temperatures falling to around 36 in the afternoon. East wind around 3 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Night: A slight chance of rain before 7pm, then a slight chance of snow between 7pm and midnight. Mostly cloudy, with a low around 30. Southeast wind around 2 mph. Chance of precipitation is 20%.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
33°1°–39°4°
Low, likely
30°−1°–32°0°
Typical high / low
55°13° / 34°1°
Wind
8 mph12 km/h, gusts 13 mph21 km/h
UV peak
1
Tuesday, Oct 27. Partly sunny. High 56°13°, low 32°0°. Typical 54°12° / 34°1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 57°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 41°5°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 36°2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 56.
Night: Partly cloudy, with a low around 32.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
52°11°–59°15°
Low, likely
28°−2°–34°1°
Typical high / low
54°12° / 34°1°
Wind
19 mph30 km/h, gusts 48 mph77 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 58°14°, low 30°−1°. Typical 54°12° / 33°1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 58°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 41°5°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 37°3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 58.
Night: Partly cloudy, with a low around 30.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
55°13°–59°15°
Low, likely
30°−1°–37°3°
Typical high / low
54°12° / 33°1°
Wind
11 mph17 km/h, gusts 39 mph63 km/h
UV peak
3
Thursday, Oct 29. Partly sunny. High 59°15°, low 33°1°. Typical 54°12° / 33°1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 60°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 46°8°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 43°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 59.
Night: Partly cloudy, with a low around 33.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
54°12°–65°18°
Low, likely
32°0°–41°5°
Typical high / low
54°12° / 33°1°
Wind
11 mph17 km/h, gusts 30 mph49 km/h
UV peak
4
Friday, Oct 30. Cloudy. High 59°15°, low 33°1°. Typical 53°12° / 32°0°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 49°10°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 59.
Night: A slight chance of rain and snow. Partly cloudy, with a low around 33.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
57°14°–68°20°
Low, likely
33°1°–45°7°
Typical high / low
53°12° / 32°0°
Wind
13 mph20 km/h, gusts 30 mph48 km/h
UV peak
3
Saturday, Oct 31. Cloudy. High 55°13°, low 39°4°. Typical 53°12° / 32°0°. Rain 0.04 in1 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 58°15°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 44°7°
  Dry
4. Overnight
  midnight–6 AM
  Fog, 39°4°
  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
43°6°–60°16°
Low, likely
35°2°–42°6°
Typical high / low
53°12° / 32°0°
Wind
16 mph26 km/h, gusts 30 mph47 km/h
UV peak
2
Sunday, Nov 1. Rain. High 48°9°, low 36°2°. Typical 53°12° / 32°0°. Rain 0.11 in2.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 48°9°
  Dry
3. Evening
  6 PM–midnight
  Clear, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 36°2°
  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
44°7°–59°15°
Low, likely
32°0°–45°7°
Typical high / low
53°12° / 32°0°
Wind
15 mph24 km/h, gusts 35 mph57 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 51°11°, low 35°2°. Typical 52°11° / 31°−1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 40°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 49°9°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 41°5°
  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
44°7°–62°17°
Low, likely
31°−1°–39°4°
Typical high / low
52°11° / 31°−1°
Wind
10 mph16 km/h, gusts 18 mph29 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 51°, low 28°.
Tomorrow
72% chance of snow, high 42°, low 29°, cooling off.
Monday
60% chance of snow, high 39°, low 30°, cooling off.
Rest of week
Mostly dry, highs 48–59°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (UNR) (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

Rapid Creek below Pactola Dam

2.2 mi

Below flood stage

Level: 7.2 ft
Flow: 19 cfs

Reading from Sat 6:15 AM · NWS gauge page

Pactola Reservoir

2.6 mi

Below flood stage

Level: 4559 ft

Reading from Sat 7:15 AM · NWS gauge page

Wild Irishman Gulch near Rapid City

3.6 mi

Below flood stage

Level: 3.5 ft

Reading from Sat 6:45 AM · NWS gauge page

Boxelder Creek near Nemo

4.2 mi

Below flood stage

Level: 1.1 ft

Reading from Sat 6:30 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 62% less heating than a typical week.

This week 55Typical 148

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 41
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 14 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 30°F).

Open the windows?

No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.

Is this typical?

Rapid City WFO · official normals 1991–2020 · records 1888–2026

Oct 24, today vs a typical year

Today’s expected high is 4°2° colder than typical.

Last 7 days vs normal

On average 13°7° warmer than normal (daily mean temperature).

+10°+6°SunOct 18
+5°+3°MonOct 19
+11°+6°TueOct 20
+14°+8°WedOct 21
+19°+11°ThuOct 22
+18°+10°FriOct 23
—SatOct 24

Johnson Siding weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 35 min; Losing 2 min 53 s a day; shortest Dec 21, 1 h 42 min less
Golden hour: 5:14–6:13 PM; Morning 7:01–8:00 AM
Blue hour: 6:13–6:24 PM; Morning 6:50–7:01 AM; first light 6:50 AM

Stars tonight? Poor

Clouds most of the night (about 64% cover).

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:34 AM · rises 4:54 PM
Full moon: Oct 25
New moon: Nov 9

Looking southwest from Johnson Siding. The highest point on the skyline is about 5,900 ft, 6 mi away.Skyline from USGS elevation data, heights drawn up to 4.5× taller. Sky, sun and moon as they are now.

Johnson Siding, SD weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Rapid Creek below Pactola Dam

Pactola Reservoir

Wild Irishman Gulch near Rapid City

Boxelder Creek near Nemo

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Poor

Moon