Observed 8:55 AM MDT at KSPF

Boulder Canyon, SD weather

Sunny and 37°3°.

Mostly agree

Now 37°3°

Sunny · Feels like 29°−2°

Feels like: 29°−2°; Wind chill from 15 mph24 km/h wind · air 37°3°
Wind: 15 mph24 km/hgusts 23 mph37 km/h; From the west-northwest. Easing to 5 mph8 km/h by 4 PM
Dew point: 27°−3°; Dry · down to 16°−9° by 12 PM
UV index: 2Low; Moderate 11 AM–4 PM · peak 4

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

27°15° cooler than this time yesterday (64°18° then, 37°3° now)

Good hours for

Gusts to 31 mph50 km/h until 11 AM
High 47°8° today at 3 PM
Rain tomorrow from noon (80%, 0.48 in12 mm)

This morningUp to 41°5° by 11 AM · gusts to 31 mph50 km/h · Clear
This afternoonUp to 47°8° by 3 PM · Partly cloudy
TonightNear 39°4° · Partly cloudy
Tomorrow morningNear 39°4° · rain chance 30% · Cloudy
Tomorrow afternoonNear 40°4° · Rain all afternoon (60%)
Tomorrow nightNear 36°2° · Rain all night (80%)
Monday morningNear 34°1° · Rain all morning (50%)

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 9a	Partly sunny	35°2° (likely 35°2° to 37°3°)	25°−4°	0%	15 mph24 km/h from NW, gusts 31 mph49 km/h	63%	28%	1
Sat 10a	Sunny	38°3° (likely 38°3° to 40°4°)	29°−2°	0%	14 mph23 km/h from NW, gusts 27 mph43 km/h	51%	6%	2
Sat 11a	Sunny	41°5° (likely 40°4° to 43°6°)	33°1°	0%	12 mph19 km/h from NW, gusts 22 mph36 km/h	42%	1%	3
Sat 12p	Sunny	42°6° (likely 42°6° to 45°7°)	36°2°	0%	9 mph14 km/h from NW, gusts 17 mph28 km/h	33%	0%	4
Sat 1p	Sunny	44°7° (likely 44°7° to 48°9°)	39°4°	0%	8 mph13 km/h from NW, gusts 14 mph22 km/h	27%	0%	4
Sat 2p	Sunny	46°8° (likely 46°8° to 49°9°)	42°6°	0%	7 mph11 km/h from NW, gusts 10 mph16 km/h	24%	3%	4
Sat 3p	Cloudy	47°8° (likely 47°8° to 49°9°)	44°7°	0%	6 mph10 km/h from NW, gusts 9 mph14 km/h	22%	60%	3
Sat 4p	Cloudy	46°8° (likely 46°8° to 48°9°)	44°7°	0%	5 mph8 km/h from N, gusts 9 mph14 km/h	23%	63%	2
Sat 5p	Cloudy	43°6° (likely 43°6° to 47°8°)	41°5°	0%	3 mph5 km/h from N, gusts 9 mph14 km/h	25%	68%	1
Sat 6p	Cloudy	40°4° (likely 40°4° to 44°7°)	38°3°	0%	3 mph5 km/h from NE, gusts 11 mph18 km/h	30%	71%	0
Sat 7p	Partly cloudy	39°4° (likely 39°4° to 43°6°)	37°3°	0%	3 mph5 km/h from E, gusts 12 mph20 km/h	32%	56%	0
Sat 8p	Clear	39°4° (likely 39°4° to 42°6°)	37°3°	0%	3 mph5 km/h from SE, gusts 12 mph20 km/h	34%	37%	0
Sat 9p	Clear	39°4° (likely 39°4° to 42°6°)	36°2°	0%	5 mph8 km/h from S, gusts 14 mph22 km/h	34%	38%	0
Sat 10p	Partly cloudy	39°4° (likely 38°3° to 42°6°)	37°3°	0%	3 mph5 km/h from S, gusts 13 mph22 km/h	34%	36%	0
Sat 11p	Mostly clear	39°4° (likely 38°3° to 42°6°)	37°3°	0%	3 mph5 km/h from S, gusts 10 mph16 km/h	34%	38%	0
Sun 12a	Mostly clear	38°3° (likely 37°3° to 42°6°)	36°2°	5%	3 mph5 km/h from S, gusts 10 mph16 km/h	37%	39%	0
Sun 1a	Partly cloudy	39°4° (likely 36°2° to 41°5°)	37°3°	5%	3 mph5 km/h from S, gusts 10 mph16 km/h	35%	49%	0
Sun 2a	Mostly cloudy	39°4° (likely 36°2° to 41°5°)	37°3°	5%	3 mph5 km/h from S, gusts 11 mph17 km/h	35%	62%	0
Sun 3a	Clear	38°3° (likely 36°2° to 41°5°)	36°2°	5%	3 mph5 km/h from SE, gusts 12 mph19 km/h	38%	28%	0
Sun 4a	Cloudy	38°3° (likely 36°2° to 41°5°)	36°2°	5%	3 mph5 km/h from SE, gusts 16 mph26 km/h	38%	64%	0
Sun 5a	Cloudy	38°3° (likely 37°3° to 41°5°)	36°2°	5%	3 mph5 km/h from SE, gusts 14 mph22 km/h	40%	89%	0
Sun 6a	Cloudy	37°3° (likely 37°3° to 43°6°)	34°1°	30%	3 mph5 km/h from SE, gusts 20 mph33 km/h	46%	98%	0
Sun 7a	Cloudy	36°2° (likely 36°2° to 43°6°)	32°0°	30%	5 mph8 km/h from SE, gusts 19 mph31 km/h	50%	99%	0
Sun 8a	Cloudy	37°3° (likely 37°3° to 43°6°)	32°0°	30%	6 mph10 km/h from SE, gusts 18 mph29 km/h	52%	100%	0
Sun 9a	Snow	39°4° (likely 39°4° to 43°6°)	34°1°	30%	7 mph11 km/h from SE, gusts 19 mph30 km/h	52%	100%	1
Sun 10a	Snow	40°4° (likely 39°4° to 43°6°)	35°2°	30%	8 mph13 km/h from SE, gusts 18 mph28 km/h	55%	100%	1
Sun 11a	Cloudy	40°4° (likely 38°3° to 43°6°)	35°2°	30%	8 mph13 km/h from SE, gusts 17 mph27 km/h	59%	100%	1
Sun 12p	Cloudy	40°4° (likely 37°3° to 43°6°)	34°1°	60%, 0.03 in0.8 mm	9 mph14 km/h from SE, gusts 18 mph29 km/h	59%	100%	2
Sun 1p	Cloudy	41°5° (likely 36°2° to 42°6°)	35°2°	60%, 0.03 in0.8 mm	9 mph14 km/h from SE, gusts 18 mph30 km/h	57%	100%	1
Sun 2p	Cloudy	42°6° (likely 35°2° to 42°6°)	36°2°	60%, 0.03 in0.8 mm	9 mph14 km/h from E, gusts 18 mph29 km/h	57%	100%	0
Sun 3p	Cloudy	42°6° (likely 35°2° to 42°6°)	36°2°	60%, 0.03 in0.8 mm	9 mph14 km/h from E, gusts 18 mph29 km/h	60%	100%	1
Sun 4p	Rain	41°5° (likely 34°1° to 41°5°)	35°2°	60%, 0.03 in0.8 mm	9 mph14 km/h from E, gusts 18 mph29 km/h	62%	100%	1
Sun 5p	Snow	39°4° (likely 34°1° to 39°4°)	33°1°	60%, 0.03 in0.8 mm	9 mph14 km/h from E, gusts 17 mph27 km/h	67%	100%	0
Sun 6p	Drizzle	37°3° (likely 34°1° to 38°3°)	31°−1°	80%, 0.02 in0.5 mm	8 mph13 km/h from E, gusts 17 mph27 km/h	72%	100%	0
Sun 7p	Snow	36°2° (likely 34°1° to 37°3°)	30°−1°	80%, 0.02 in0.5 mm	8 mph13 km/h from E, gusts 16 mph26 km/h	82%	100%	0
Sun 8p	Snow	36°2° (likely 34°1° to 37°3°)	30°−1°	80%, 0.02 in0.5 mm	7 mph11 km/h from SE, gusts 16 mph26 km/h	85%	100%	0
Sun 9p	Snow	36°2° (likely 33°1° to 36°2°)	30°−1°	80%, 0.02 in0.5 mm	7 mph11 km/h from SE, gusts 16 mph26 km/h	89%	100%	0
Sun 10p	Snow	36°2° (likely 33°1° to 36°2°)	31°−1°	80%, 0.02 in0.5 mm	6 mph10 km/h from SE, gusts 16 mph26 km/h	89%	100%	0
Sun 11p	Snow	35°2° (likely 33°1° to 35°2°)	31°−1°	80%, 0.02 in0.5 mm	5 mph8 km/h from SE, gusts 16 mph26 km/h	92%	100%	0
Mon 12a	Snow	35°2° (likely 33°1° to 35°2°)	31°−1°	40%, 0.01 in0.3 mm	5 mph8 km/h from SE, gusts 16 mph26 km/h	89%	100%	0
Mon 1a	Snow	35°2° (likely 33°1° to 35°2°)	31°−1°	40%, 0.01 in0.3 mm	5 mph8 km/h from SE, gusts 14 mph23 km/h	89%	100%	0
Mon 2a	Snow	35°2° (likely 32°0° to 35°2°)	31°−1°	40%, 0.01 in0.3 mm	5 mph8 km/h from SE, gusts 14 mph22 km/h	89%	100%	0
Mon 3a	Snow	35°2° (likely 32°0° to 35°2°)	31°−1°	40%, 0.01 in0.3 mm	5 mph8 km/h from SE, gusts 14 mph22 km/h	89%	100%	0
Mon 4a	Snow	34°1° (likely 32°0° to 34°1°)	30°−1°	40%, 0.01 in0.3 mm	5 mph8 km/h from SE, gusts 14 mph23 km/h	92%	100%	0
Mon 5a	Snow	34°1° (likely 32°0° to 34°1°)	30°−1°	40%, 0.01 in0.3 mm	5 mph8 km/h from SE, gusts 15 mph23 km/h	92%	100%	0
Mon 6a	Snow	34°1° (likely 31°−1° to 34°1°)	30°−1°	50%, 0.04 in1 mm	5 mph8 km/h from SE, gusts 15 mph24 km/h	92%	100%	0
Mon 7a	Snow	34°1° (likely 31°−1° to 35°2°)	29°−2°	50%, 0.04 in1 mm	6 mph10 km/h from SE, gusts 14 mph22 km/h	92%	100%	0
Mon 8a	Snow	34°1° (likely 31°−1° to 35°2°)	29°−2°	50%, 0.04 in1 mm	6 mph10 km/h from E, gusts 13 mph20 km/h	89%	100%	0

Days ahead

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

Today, Oct 24. Cloudy. High 47°8°, low 36°2°. Typical 54°12° / 32°0°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 47°8°
  Dry
3. Evening
  6 PM–midnight
  Clear, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 38°3°
  Dry
Official NWS forecast
Today: Sunny. High near 47, with temperatures falling to around 43 in the afternoon. Northwest wind 3 to 15 mph, with gusts as high as 30 mph.
Tonight: Mostly cloudy. Low around 36, with temperatures rising to around 38 overnight. Southeast wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
47°8°–49°9°
Low, likely
34°1°–36°2°
Typical high / low
54°12° / 32°0°
Wind
24 mph39 km/h, gusts 45 mph73 km/h
UV peak
4
Tomorrow, Oct 25. Snow. High 43°6°, low 33°1°. Typical 54°12° / 32°0°. Snow 0.12 in3 mm, 60% chance. Mostly agree.
1. Morning
  6 AM–noon
  Snow, 37°3°
  30% chance
2. Afternoon
  noon–6 PM
  Snow, 42°6°
  60% chance · 0.18 in4.6 mm
3. Evening
  6 PM–midnight
  Snow, 36°2°
  80% chance · 0.12 in3 mm
4. Overnight
  midnight–6 AM
  Snow, 34°1°
  40% chance · 0.06 in1.5 mm
Official NWS forecast
Day: A chance of snow before 9am, then a chance of rain and snow between 9am and noon, then rain and snow likely. Cloudy. High near 43, with temperatures falling to around 39 in the afternoon. Southeast wind 3 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Night: Rain and snow. Cloudy, with a low around 33. Southeast wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
40°4°–44°7°
Low, likely
33°1°–35°2°
Typical high / low
54°12° / 32°0°
Wind
14 mph22 km/h, gusts 26 mph42 km/h
UV peak
2
Monday, Oct 26. Snow. High 39°4°, low 33°1°. Typical 53°12° / 32°0°. Snow 0–3 in0–8 cm, 50% chance. Mostly agree.
1. Morning
  6 AM–noon
  Snow, 34°1°
  80% chance · 0.4 in0.9 cm
2. Afternoon
  noon–6 PM
  Snow, 33°0°
  80% chance · 0.5 in1.3 cm
3. Evening
  6 PM–midnight
  Cloudy, 30°−1°
  50% chance
4. Overnight
  midnight–6 AM
  Fog, 29°−2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow before 10am, then a chance of rain and snow between 10am and noon, then a chance of rain and snow between noon and 5pm, then a chance of rain and snow. Cloudy. High near 39, with temperatures falling to around 37 in the afternoon. Southeast wind 5 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Night: Mostly cloudy, with a low around 33. Southeast wind 2 to 7 mph, with gusts as high as 20 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
33°1°–39°4°
Low, likely
28°−2°–33°1°
Typical high / low
53°12° / 32°0°
Wind
11 mph17 km/h, gusts 19 mph31 km/h
UV peak
1
Tuesday, Oct 27. Partly sunny. High 53°12°, low 39°4°. Typical 53°12° / 32°0°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 31°−1°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 57°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 53.
Night: A slight chance of rain before midnight. Partly cloudy, with a low around 39.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
49°9°–60°16°
Low, likely
24°−4°–39°4°
Typical high / low
53°12° / 32°0°
Wind
26 mph42 km/h, gusts 46 mph74 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 53°12°, low 36°2°. Typical 52°11° / 31°−1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 57°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 43°6°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°5°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 53.
Night: Partly cloudy, with a low around 36.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
53°12°–58°14°
Low, likely
31°−1°–38°3°
Typical high / low
52°11° / 31°−1°
Wind
19 mph30 km/h, gusts 50 mph80 km/h
UV peak
3
Thursday, Oct 29. Partly sunny. High 55°13°, low 39°4°. Typical 52°11° / 31°−1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 42°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 55°13°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 44°7°
  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 55.
Night: Partly cloudy, with a low around 39.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
54°12°–59°15°
Low, likely
34°1°–43°6°
Typical high / low
52°11° / 31°−1°
Wind
17 mph27 km/h, gusts 37 mph59 km/h
UV peak
3
Friday, Oct 30. Mostly cloudy. High 55°13°, low 39°4°. Typical 52°11° / 31°−1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 58°14°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 46°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 55.
Night: A slight chance of rain after midnight. Partly cloudy, with a low around 39.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
49°9°–67°19°
Low, likely
38°3°–46°8°
Typical high / low
52°11° / 31°−1°
Wind
16 mph25 km/h, gusts 34 mph55 km/h
UV peak
3
Saturday, Oct 31. Cloudy. High 51°11°, low 38°3°. Typical 51°11° / 30°−1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 47°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 53°12°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 44°6°
  Dry
4. Overnight
  midnight–6 AM
  Drizzle, 38°3°
  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
41°5°–60°16°
Low, likely
35°2°–42°6°
Typical high / low
51°11° / 30°−1°
Wind
15 mph24 km/h, gusts 23 mph37 km/h
UV peak
2
Sunday, Nov 1. Drizzle. High 45°7°, low 36°2°. Typical 51°11° / 30°−1°. Rain 0.08 in2 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 38°4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 45°7°
  Dry
3. Evening
  6 PM–midnight
  Clear, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 37°3°
  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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
43°6°–50°10°
Low, likely
33°1°–43°6°
Typical high / low
51°11° / 30°−1°
Wind
21 mph33 km/h, gusts 34 mph55 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 51°11°, low 36°2°. Typical 51°11° / 30°−1°. Rain 0.16 in4.1 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 42°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 49°10°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 42°6°
  20% chance · 0.01 in0.3 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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
43°6°–62°17°
Low, likely
33°1°–39°4°
Typical high / low
51°11° / 30°−1°
Wind
11 mph17 km/h, gusts 25 mph41 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 47°, low 36°.
Tomorrow
62% chance of snow, high 43°, low 33°, cooling off.
Monday
52% chance of snow, high 39°, low 33°, cooling off.
Rest of week
Mostly dry, highs 45–55°.

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

Bear Butte Creek in Boulder Canyon

1.1 mi

Below flood stage

Level: 3.5 ft
Flow: 17 cfs

Reading from Sat 8:15 AM · NWS gauge page

Whitewood Creek above Whitewood

3.3 mi

Below flood stage

Level: 0.2 ft
Flow: 5 cfs

Reading from Sat 7:50 AM · NWS gauge page

Bear Butte Creek near Galena

4.5 mi

Below flood stage

Level: 3.6 ft
Flow: 1 cfs

Reading from Sat 7:45 AM · NWS gauge page

Whitewood Creek at Deadwood

5.6 mi

Below flood stage

Level: 4449 ft

Reading from Sat 8:15 AM · NWS gauge page

For your home

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

Heating this week

About 68% less heating than a typical week.

This week 52Typical 160

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 47
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 27°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?

SPEARFISH · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

Today’s expected high is 7°4° colder than typical.

Last 7 days vs normal

On average 2°1° warmer than normal (daily mean temperature).

−1°SunOct 18
−4°−2°MonOct 19
+12°+6°TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

Boulder Canyon weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 34 min; Losing 2 min 53 s a day; shortest Dec 21, 1 h 44 min less
Golden hour: 5:14–6:13 PM; Morning 7:02–8:01 AM
Blue hour: 6:13–6:24 PM; Morning 6:51–7:02 AM; first light 6:51 AM

Stars tonight? Poor

Clouds most of the night (about 54% cover).

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:35 AM · rises 4:55 PM
Full moon: Oct 25
New moon: Nov 9

Looking southwest from Boulder Canyon. The highest point on the skyline is about 5,700 ft, 4 mi away.Skyline from USGS elevation data, heights drawn up to 3.5× taller. Sky, sun and moon as they are now.

Boulder Canyon, SD weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Bear Butte Creek in Boulder Canyon

Whitewood Creek above Whitewood

Bear Butte Creek near Galena

Whitewood Creek at Deadwood

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