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Current weather in Spearfish is clear sky.

Where can I find the hourly weather forecast for Spearfish?

This page shows hourly weather forecast for Spearfish, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Spearfish updated regularly?

Weather data for Spearfish is updated regularly with the latest available observations and forecasts.

Now · 4:34 PM

Spearfish Weather & Hourly Forecast

United States · South Dakota · 57783

83°F

Sunny

Feels like: 78°F

💧 Humidity 18% 🌡 Pressure 29.71 inHg 💨 Wind 3 mph 👁 Visibility 33.1 mi ☁ Clouds 0% ☀️ UV index 2.9 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Spearfish

Today

5:00 PM

Sunny

83° 💧 None 💨 3 mph H 18%29.71 inHg

8:00 PM

Partly cloudy night

64° 💧 None 💨 7 mph H 42%29.71 inHg

11:00 PM

Overcast night

64° 💧 None 💨 6 mph H 29%29.68 inHg

Tomorrow

2:00 AM

Partly cloudy night

65° 💧 None 💨 7 mph H 26%29.62 inHg

5:00 AM

Mostly cloudy night

65° 💧 None 💨 6 mph H 26%29.59 inHg

8:00 AM

Mostly sunny

70° 💧 None 💨 12 mph H 26%29.65 inHg

11:00 AM

Partly cloudy

72° 💧 None 💨 14 mph H 32%29.71 inHg

2:00 PM

Sunny

76° 💧 0.000 in 💨 11 mph H 37%29.74 inHg

5:00 PM

Mostly sunny

74° 💧 0.000 in 💨 8 mph H 38%29.77 inHg

8:00 PM

Mostly clear night

64° 💧 None 💨 9 mph H 44%29.85 inHg

11:00 PM

Light rain

56° 💧 0.134 in 💨 4 mph H 66%30.00 inHg

Saturday

2:00 AM

Partly cloudy night

52° 💧 0.002 in 💨 3 mph H 87%30.06 inHg

5:00 AM

Mostly cloudy night

50° 💧 0.001 in 💨 1 mph H 96%30.09 inHg

8:00 AM

Mostly cloudy

52° 💧 None 💨 1 mph H 86%30.12 inHg

11:00 AM

Overcast

56° 💧 None 💨 6 mph H 65%30.12 inHg

2:00 PM

Partly cloudy

64° 💧 None 💨 9 mph H 51%30.03 inHg

Today

5:00 PM

Sunny

83° 💧 None 💨 3 mph H 18%29.71 inHg

6:00 PM

Sunny

80° 💧 None 💨 2 mph H 31%29.71 inHg

7:00 PM

Sunny

71° 💧 None 💨 4 mph H 39%29.71 inHg

8:00 PM

Partly cloudy night

64° 💧 None 💨 7 mph H 42%29.71 inHg

9:00 PM

Mostly cloudy night

64° 💧 None 💨 8 mph H 36%29.71 inHg

10:00 PM

Mostly cloudy night

66° 💧 None 💨 7 mph H 27%29.71 inHg

11:00 PM

Overcast night

64° 💧 None 💨 6 mph H 29%29.68 inHg

Tomorrow

12:00 AM

Partly cloudy night

62° 💧 None 💨 6 mph H 32%29.65 inHg

1:00 AM

Mostly cloudy night

61° 💧 None 💨 7 mph H 32%29.65 inHg

2:00 AM

Partly cloudy night

65° 💧 None 💨 7 mph H 26%29.62 inHg

3:00 AM

Partly cloudy night

66° 💧 None 💨 5 mph H 25%29.59 inHg

4:00 AM

Partly cloudy night

65° 💧 None 💨 4 mph H 27%29.59 inHg

5:00 AM

Mostly cloudy night

65° 💧 None 💨 6 mph H 26%29.59 inHg

6:00 AM

Mostly cloudy night

68° 💧 None 💨 10 mph H 23%29.59 inHg

7:00 AM

Partly cloudy

69° 💧 None 💨 12 mph H 23%29.62 inHg

8:00 AM

Mostly sunny

70° 💧 None 💨 12 mph H 26%29.65 inHg

9:00 AM

Sunny

72° 💧 None 💨 10 mph H 28%29.65 inHg

10:00 AM

Sunny

73° 💧 None 💨 13 mph H 28%29.68 inHg

11:00 AM

Partly cloudy

72° 💧 None 💨 14 mph H 32%29.71 inHg

12:00 PM

Mostly sunny

72° 💧 None 💨 13 mph H 36%29.74 inHg

1:00 PM

Sunny

74° 💧 None 💨 12 mph H 37%29.74 inHg

2:00 PM

Sunny

76° 💧 None 💨 11 mph H 37%29.74 inHg

3:00 PM

Mostly sunny

76° 💧 None 💨 10 mph H 35%29.74 inHg

4:00 PM

Sunny

75° 💧 0.000 in 💨 9 mph H 37%29.74 inHg

5:00 PM

Mostly sunny

74° 💧 None 💨 8 mph H 38%29.77 inHg

6:00 PM

Mostly sunny

72° 💧 None 💨 8 mph H 40%29.80 inHg

7:00 PM

Mostly sunny

67° 💧 0.000 in 💨 9 mph H 43%29.83 inHg

8:00 PM

Mostly clear night

64° 💧 None 💨 9 mph H 44%29.85 inHg

9:00 PM

Partly cloudy night

60° 💧 None 💨 5 mph H 47%29.91 inHg

10:00 PM

Mostly cloudy night

58° 💧 None 💨 3 mph H 54%29.94 inHg

11:00 PM

Light rain

56° 💧 0.012 in 💨 4 mph H 66%30.00 inHg

Saturday

12:00 AM

Moderate rain

54° 💧 0.104 in 💨 4 mph H 85%30.03 inHg

1:00 AM

Light rain

54° 💧 0.019 in 💨 2 mph H 87%30.03 inHg

2:00 AM

Partly cloudy night

52° 💧 0.002 in 💨 3 mph H 87%30.06 inHg

3:00 AM

Mostly clear night

51° 💧 None 💨 3 mph H 93%30.06 inHg

4:00 AM

Mostly clear night

51° 💧 None 💨 2 mph H 95%30.06 inHg

5:00 AM

Mostly cloudy night

50° 💧 0.000 in 💨 1 mph H 96%30.09 inHg

6:00 AM

Overcast night

51° 💧 0.001 in 💨 2 mph H 96%30.09 inHg

7:00 AM

Mostly cloudy

51° 💧 None 💨 1 mph H 93%30.12 inHg

8:00 AM

Mostly cloudy

52° 💧 None 💨 1 mph H 86%30.12 inHg

9:00 AM

Overcast

54° 💧 None 💨 3 mph H 72%30.15 inHg

10:00 AM

Overcast

56° 💧 None 💨 5 mph H 65%30.12 inHg

11:00 AM

Overcast

56° 💧 None 💨 6 mph H 65%30.12 inHg

12:00 PM

Mostly cloudy

59° 💧 None 💨 7 mph H 61%30.12 inHg

1:00 PM

Partly cloudy

61° 💧 None 💨 8 mph H 56%30.09 inHg

2:00 PM

Partly cloudy

64° 💧 None 💨 9 mph H 51%30.03 inHg

3:00 PM

Mostly sunny

66° 💧 None 💨 10 mph H 47%30.00 inHg

4:00 PM

Sunny

67° 💧 None 💨 11 mph H 45%29.97 inHg

5:00 PM

Mostly cloudy

67° 💧 None 💨 12 mph H 44%29.94 inHg

6:00 PM

Mostly cloudy

65° 💧 None 💨 12 mph H 45%29.94 inHg

7:00 PM

Mostly cloudy

62° 💧 None 💨 10 mph H 50%29.97 inHg

8:00 PM

Overcast night

60° 💧 None 💨 10 mph H 54%29.97 inHg

9:00 PM

Overcast night

60° 💧 None 💨 11 mph H 56%29.97 inHg

10:00 PM

Overcast night

59° 💧 None 💨 12 mph H 58%29.97 inHg

11:00 PM

Overcast night

57° 💧 0.004 in 💨 12 mph H 67%29.97 inHg

Sunday

12:00 AM

Light thunderstorms

54° 💧 0.021 in 💨 12 mph H 82%29.94 inHg

1:00 AM

Overcast night

53° 💧 0.003 in 💨 12 mph H 84%29.94 inHg

2:00 AM

Mostly cloudy night

52° 💧 0.001 in 💨 11 mph H 83%29.91 inHg

3:00 AM

Mostly cloudy night

51° 💧 None 💨 12 mph H 82%29.91 inHg

4:00 AM

Overcast night

50° 💧 None 💨 13 mph H 82%29.94 inHg

5:00 AM

Overcast night

50° 💧 0.000 in 💨 12 mph H 81%29.94 inHg

6:00 AM

Overcast night

50° 💧 0.001 in 💨 11 mph H 82%29.97 inHg

9:00 AM

Light rain

50° 💧 None 💨 14 mph H 96%29.97 inHg

12:00 PM

Mostly cloudy

61° 💧 None 💨 16 mph H 66%29.88 inHg

3:00 PM

Partly cloudy

62° 💧 None 💨 18 mph H 68%29.83 inHg

6:00 PM

Mostly cloudy

59° 💧 None 💨 18 mph H 79%29.83 inHg

9:00 PM

Overcast night

56° 💧 None 💨 10 mph H 86%29.83 inHg

Monday

12:00 AM

Mostly cloudy night

57° 💧 None 💨 12 mph H 94%29.74 inHg

3:00 AM

Partly cloudy night

56° 💧 None 💨 7 mph H 94%29.77 inHg

6:00 AM

Mostly clear night

57° 💧 None 💨 11 mph H 90%29.83 inHg

9:00 AM

Sunny

57° 💧 None 💨 13 mph H 63%29.91 inHg

12:00 PM

Sunny

64° 💧 None 💨 13 mph H 39%29.94 inHg

3:00 PM

Sunny

68° 💧 None 💨 15 mph H 31%29.88 inHg

6:00 PM

Sunny

64° 💧 None 💨 12 mph H 36%29.94 inHg

9:00 PM

Mostly clear night

53° 💧 None 💨 6 mph H 58%30.09 inHg

Tuesday

12:00 AM

Clear night

49° 💧 None 💨 6 mph H 70%30.18 inHg

3:00 AM

Clear night

46° 💧 None 💨 3 mph H 79%30.18 inHg

6:00 AM

Mostly clear night

45° 💧 None 💨 1 mph H 78%30.21 inHg

9:00 AM

Mostly sunny

53° 💧 None 💨 6 mph H 62%30.21 inHg

12:00 PM

Partly cloudy

60° 💧 None 💨 12 mph H 50%30.15 inHg

3:00 PM

Mostly sunny

65° 💧 None 💨 14 mph H 44%30.03 inHg

6:00 PM

Mostly sunny

63° 💧 None 💨 13 mph H 49%30.00 inHg

9:00 PM

Clear night

56° 💧 None 💨 12 mph H 63%30.03 inHg

Wednesday

12:00 AM

Clear night

57° 💧 None 💨 5 mph H 63%29.97 inHg

3:00 AM

Clear night

53° 💧 None 💨 3 mph H 77%29.91 inHg

6:00 AM

Mostly cloudy night

53° 💧 None 💨 2 mph H 83%29.91 inHg

12:00 PM

Partly cloudy

70° 💧 None 💨 4 mph H 55%29.94 inHg

6:00 PM

Overcast

72° 💧 None 💨 2 mph H 65%29.94 inHg

Thursday

12:00 AM

Overcast night

62° 💧 None 💨 8 mph H 72%30.18 inHg

6:00 AM

Clear night

51° 💧 None 💨 5 mph H 84%30.33 inHg

12:00 PM

Sunny

63° 💧 None 💨 9 mph H 57%30.36 inHg

6:00 PM

Mostly sunny

66° 💧 None 💨 7 mph H 52%30.21 inHg

Friday

12:00 AM

Mostly clear night

58° 💧 None 💨 4 mph H 70%30.15 inHg

6:00 AM

Mostly clear night

55° 💧 None 💨 2 mph H 86%30.09 inHg

12:00 PM

Light rain

64° 💧 None 💨 2 mph H 81%30.09 inHg

6:00 PM

Mostly sunny

63° 💧 None 💨 8 mph H 90%30.03 inHg

Saturday

12:00 AM

Light rain

55° 💧 None 💨 11 mph H 96%30.15 inHg

6:00 AM

Clear night

52° 💧 None 💨 8 mph H 94%30.21 inHg

12:00 PM

Sunny

63° 💧 None 💨 7 mph H 51%30.24 inHg

6:00 PM

Sunny

63° 💧 None 💨 3 mph H 48%30.15 inHg

Sunday

12:00 AM

Clear night

52° 💧 None 💨 8 mph H 65%30.18 inHg

6:00 AM

Clear night

48° 💧 None 💨 5 mph H 76%30.15 inHg

12:00 PM

Mostly cloudy

71° 💧 None 💨 12 mph H 44%30.03 inHg

6:00 PM

Mostly cloudy

68° 💧 None 💨 12 mph H 45%29.91 inHg

Monday

12:00 AM

Overcast night

64° 💧 None 💨 6 mph H 52%29.85 inHg

6:00 AM

Mostly clear night

56° 💧 None 💨 2 mph H 92%29.91 inHg

12:00 PM

Mostly sunny

70° 💧 None 💨 7 mph H 53%29.91 inHg

6:00 PM

Mostly sunny

67° 💧 None 💨 6 mph H 57%29.94 inHg

Tuesday

12:00 AM

Clear night

56° 💧 None 💨 3 mph H 75%30.03 inHg

6:00 AM

Mostly clear night

53° 💧 None 💨 1 mph H 85%30.03 inHg

12:00 PM

Sunny

65° 💧 None 💨 7 mph H 68%30.03 inHg

6:00 PM

Sunny

66° 💧 None 💨 12 mph H 63%29.94 inHg

Wednesday

12:00 AM

Mostly clear night

59° 💧 None 💨 6 mph H 66%29.94 inHg

6:00 AM

Partly cloudy night

55° 💧 None 💨 2 mph H 77%29.91 inHg

12:00 PM

Partly cloudy

78° 💧 None 💨 6 mph H 51%29.88 inHg

6:00 PM

Partly cloudy

75° 💧 None 💨 12 mph H 47%29.83 inHg

Thursday

12:00 AM

Overcast night

65° 💧 None 💨 5 mph H 69%29.97 inHg

6:00 AM

Overcast night

60° 💧 None 💨 10 mph H 86%30.12 inHg

12:00 PM

Moderate rain

61° 💧 None 💨 8 mph H 97%30.21 inHg

6:00 PM

Mostly sunny

62° 💧 None 💨 2 mph H 91%30.21 inHg

Friday

12:00 AM

Overcast night

58° 💧 None 💨 4 mph H 99%30.24 inHg

6:00 AM

Mostly cloudy night

54° 💧 None 💨 3 mph H 99%30.24 inHg

In Spearfish and, more broadly, across the state of South Dakota: Clear skies will continue into the evening, with temperatures remaining mild to warm, ranging from 69 to 82 degrees Fahrenheit. Winds from the southwest will be moderate, reaching speeds of up to 14 mph, with gusts up to 19 mph. No precipitation is expected tonight, making for calm and pleasant conditions as the night progresses. It will be a comfortable evening, with gentle breezes and mild temperatures.

15-Day Weather Outlook for Spearfish

TomorrowTomorrow

Partly cloudy 80°/61° 💧 None 💨 14 mph

Saturday, Sep 12Sat Sep 12

Mostly sunny 72°/50° 💧 None 💨 12 mph

Sunday, Sep 13Sun Sep 13

Light thunderstorms 65°/50° 💧 0.296 in 💨 18 mph

Monday, Sep 14Mon Sep 14

Mostly cloudy 68°/56° 💧 0.256 in 💨 18 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 65°/45° 💧 None 💨 14 mph

Wednesday, Sep 16Wed Sep 16

Mostly sunny 70°/53° 💧 0.001 in 💨 13 mph

Thursday, Sep 17Thu Sep 17

Overcast 72°/51° 💧 0.001 in 💨 9 mph

Friday, Sep 18Fri Sep 18

Light rain 66°/55° 💧 0.105 in 💨 7 mph

Saturday, Sep 19Sat Sep 19

Light rain 63°/52° 💧 0.381 in 💨 11 mph

Sunday, Sep 20Sun Sep 20

Mostly cloudy 71°/48° 💧 None 💨 12 mph

Monday, Sep 21Mon Sep 21

Mostly cloudy 70°/56° 💧 0.071 in 💨 12 mph

Tuesday, Sep 22Tue Sep 22

Mostly sunny 67°/53° 💧 0.121 in 💨 7 mph

Wednesday, Sep 23Wed Sep 23

Mostly sunny 78°/55° 💧 None 💨 12 mph

Thursday, Sep 24Thu Sep 24

Moderate rain 75°/60° 💧 0.121 in 💨 12 mph

Friday, Sep 25Fri Sep 25

Mostly sunny 62°/54° 💧 0.131 in 💨 4 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Spearfish

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Spearfish

Hourly forecast · Updated every 2 hours

Moderate

Nearest forecast value 5:00 PM

PM2.5 Fine particles Good 1,1µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 3,5µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Moderate 103,1µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 0,5µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Sensitive people should reduce strenuous and prolonged outdoor exertion.

UV & HEALTH

UV, Sun & Health Outlook in Spearfish

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 6,8High 😐Moderate

Tomorrow UV 6,5High 🙂Fair

Saturday UV 5,7Moderate 🙂Fair

Sunday UV 4,4Moderate 🙂Fair

Monday UV 5,7Moderate 🙂Fair

Tuesday UV 4,0Moderate —Unavailable

Wednesday UV 6,0High —Unavailable

Hourly UV index today

5:00 PMUV 1,4 6:00 PMUV 0,4 7:00 PMUV 0,0

Today's weather health advice Open today's recommendations.

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Caution for sensitive people

People with respiratory or cardiovascular conditions should reduce prolonged outdoor exertion.

Stay hydrated

Drink water regularly, especially during physical activity or prolonged sun exposure. Dry air can increase hydration needs.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Spearfish

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · SPEARFISH, SOUTH DAKOTA

Tonight's Stargazing & Shooting Stars

Good observing conditions. Best local viewing window: 2:00 AM–3:00 AM.

70/100Best-hour score

BEST TIME TONIGHT 2:00 AM–3:00 AM Astronomical darkness: 8:56 PM–4:49 AM

☁ Cloud cover 41% Real hourly forecast for the best viewing hour.

☾ Moonlight 0% New Moon · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 59° high at the best hour.

✦ Estimated visible meteors 1–3/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min64%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

DISCOVER WEATHER NEARBY Weather in other cities

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Forecast data for Spearfish were last refreshed today at 4:33 PM. The current forecast period extends through 12/09/2026 at 2:00 PM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.