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Current weather in Harrison is broken clouds.

Where can I find the hourly weather forecast for Harrison?

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

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

Now · 2:06 AM

Harrison Weather & Hourly Forecast

United States · Montana · 59735

52°F

Mostly cloudy night

Feels like: 49°F

💧 Humidity 55% 🌡 Pressure 29.94 inHg 💨 Wind 1 mph 👁 Visibility 28.1 mi ☁ Clouds 79% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Harrison

Today

3:00 AM

Partly cloudy night

52° 💧 None 💨 1 mph H 56%29.94 inHg

6:00 AM

Partly cloudy night

51° 💧 None 💨 1 mph H 56%29.94 inHg

9:00 AM

Mostly sunny

56° 💧 None 💨 3 mph H 52%29.94 inHg

12:00 PM

Overcast

65° 💧 None 💨 3 mph H 44%29.91 inHg

3:00 PM

Overcast

69° 💧 None 💨 3 mph H 35%29.85 inHg

6:00 PM

Overcast

66° 💧 0.045 in 💨 1 mph H 45%29.83 inHg

9:00 PM

Overcast night

56° 💧 0.014 in 💨 6 mph H 80%29.88 inHg

Tomorrow

12:00 AM

Overcast night

54° 💧 0.004 in 💨 3 mph H 84%29.94 inHg

3:00 AM

Overcast night

53° 💧 0.000 in 💨 3 mph H 81%29.94 inHg

6:00 AM

Partly cloudy night

50° 💧 None 💨 3 mph H 80%29.97 inHg

9:00 AM

Sunny

56° 💧 None 💨 3 mph H 74%30.03 inHg

12:00 PM

Strong thunderstorm

64° 💧 0.025 in 💨 4 mph H 52%30.06 inHg

3:00 PM

Strong thunderstorm

67° 💧 0.005 in 💨 5 mph H 48%30.00 inHg

6:00 PM

Partly cloudy

65° 💧 0.001 in 💨 3 mph H 49%30.03 inHg

9:00 PM

Clear night

56° 💧 None 💨 2 mph H 57%30.03 inHg

Thursday

12:00 AM

Clear night

52° 💧 None 💨 2 mph H 60%30.06 inHg

Today

3:00 AM

Partly cloudy night

52° 💧 None 💨 1 mph H 56%29.94 inHg

4:00 AM

Mostly clear night

52° 💧 None 💨 1 mph H 56%29.94 inHg

5:00 AM

Mostly clear night

51° 💧 None 💨 1 mph H 56%29.94 inHg

6:00 AM

Partly cloudy night

51° 💧 None 💨 1 mph H 56%29.94 inHg

7:00 AM

Mostly clear night

50° 💧 None 💨 1 mph H 58%29.94 inHg

8:00 AM

Mostly sunny

51° 💧 None 💨 2 mph H 60%29.94 inHg

9:00 AM

Mostly sunny

56° 💧 None 💨 3 mph H 52%29.94 inHg

10:00 AM

Mostly cloudy

59° 💧 None 💨 2 mph H 50%29.94 inHg

11:00 AM

Mostly cloudy

62° 💧 None 💨 2 mph H 47%29.94 inHg

12:00 PM

Overcast

65° 💧 None 💨 3 mph H 44%29.91 inHg

1:00 PM

Mostly cloudy

67° 💧 None 💨 5 mph H 41%29.88 inHg

2:00 PM

Overcast

68° 💧 None 💨 5 mph H 38%29.85 inHg

3:00 PM

Overcast

69° 💧 None 💨 3 mph H 35%29.85 inHg

4:00 PM

Overcast

69° 💧 None 💨 3 mph H 34%29.83 inHg

5:00 PM

Overcast

69° 💧 None 💨 5 mph H 35%29.83 inHg

6:00 PM

Overcast

66° 💧 None 💨 1 mph H 45%29.83 inHg

7:00 PM

Light rain

58° 💧 0.035 in 💨 7 mph H 75%29.85 inHg

8:00 PM

Light rain

56° 💧 0.010 in 💨 4 mph H 83%29.85 inHg

9:00 PM

Overcast night

56° 💧 0.000 in 💨 6 mph H 80%29.88 inHg

10:00 PM

Light rain

56° 💧 0.008 in 💨 5 mph H 77%29.91 inHg

11:00 PM

Light rain

55° 💧 0.005 in 💨 5 mph H 80%29.94 inHg

Tomorrow

12:00 AM

Overcast night

54° 💧 0.001 in 💨 3 mph H 84%29.94 inHg

1:00 AM

Overcast night

54° 💧 0.000 in 💨 2 mph H 84%29.91 inHg

2:00 AM

Overcast night

54° 💧 0.002 in 💨 3 mph H 82%29.94 inHg

3:00 AM

Overcast night

53° 💧 None 💨 3 mph H 81%29.94 inHg

4:00 AM

Overcast night

52° 💧 0.000 in 💨 3 mph H 81%29.94 inHg

5:00 AM

Mostly cloudy night

50° 💧 None 💨 2 mph H 81%29.97 inHg

6:00 AM

Partly cloudy night

50° 💧 None 💨 3 mph H 80%29.97 inHg

7:00 AM

Mostly cloudy night

49° 💧 None 💨 3 mph H 82%30.00 inHg

8:00 AM

Partly cloudy

50° 💧 None 💨 2 mph H 81%30.03 inHg

9:00 AM

Sunny

56° 💧 None 💨 3 mph H 74%30.03 inHg

10:00 AM

Sunny

60° 💧 None 💨 2 mph H 58%30.06 inHg

11:00 AM

Sunny

63° 💧 None 💨 2 mph H 53%30.06 inHg

12:00 PM

Strong thunderstorm

64° 💧 0.001 in 💨 4 mph H 52%30.06 inHg

1:00 PM

Light thunderstorms

64° 💧 0.014 in 💨 3 mph H 54%30.06 inHg

2:00 PM

Light thunderstorms

65° 💧 0.010 in 💨 3 mph H 51%30.03 inHg

3:00 PM

Strong thunderstorm

67° 💧 0.002 in 💨 5 mph H 48%30.00 inHg

4:00 PM

Mostly sunny

67° 💧 0.002 in 💨 5 mph H 47%30.00 inHg

5:00 PM

Sunny

67° 💧 0.001 in 💨 6 mph H 46%30.00 inHg

6:00 PM

Partly cloudy

65° 💧 0.001 in 💨 3 mph H 49%30.03 inHg

7:00 PM

Sunny

61° 💧 None 💨 1 mph H 63%30.00 inHg

8:00 PM

Clear night

57° 💧 None 💨 2 mph H 59%30.03 inHg

9:00 PM

Clear night

56° 💧 None 💨 2 mph H 57%30.03 inHg

10:00 PM

Clear night

54° 💧 None 💨 3 mph H 57%30.03 inHg

11:00 PM

Clear night

53° 💧 None 💨 3 mph H 59%30.03 inHg

Thursday

12:00 AM

Clear night

52° 💧 None 💨 2 mph H 60%30.06 inHg

1:00 AM

Clear night

52° 💧 None 💨 2 mph H 58%30.06 inHg

2:00 AM

Clear night

52° 💧 None 💨 2 mph H 58%30.09 inHg

3:00 AM

Clear night

52° 💧 None 💨 1 mph H 58%30.09 inHg

4:00 AM

Clear night

52° 💧 None 💨 1 mph H 59%30.09 inHg

5:00 AM

Clear night

51° 💧 None 💨 1 mph H 60%30.09 inHg

6:00 AM

Clear night

51° 💧 None 💨 1 mph H 61%30.09 inHg

7:00 AM

Clear night

50° 💧 None 💨 1 mph H 61%30.09 inHg

8:00 AM

Sunny

52° 💧 None 💨 1 mph H 61%30.12 inHg

9:00 AM

Sunny

56° 💧 None 💨 3 mph H 54%30.12 inHg

10:00 AM

Sunny

58° 💧 None 💨 3 mph H 54%30.12 inHg

11:00 AM

Sunny

61° 💧 None 💨 2 mph H 50%30.09 inHg

12:00 PM

Sunny

64° 💧 None 💨 2 mph H 48%30.06 inHg

1:00 PM

Sunny

67° 💧 None 💨 3 mph H 46%30.03 inHg

2:00 PM

Mostly cloudy

69° 💧 None 💨 4 mph H 44%30.00 inHg

3:00 PM

Partly cloudy

70° 💧 None 💨 4 mph H 41%29.97 inHg

4:00 PM

Overcast

70° 💧 None 💨 3 mph H 37%29.94 inHg

5:00 PM

Overcast

70° 💧 None 💨 1 mph H 36%29.94 inHg

6:00 PM

Overcast

68° 💧 None 💨 1 mph H 41%29.91 inHg

9:00 PM

Overcast night

64° 💧 None 💨 1 mph H 51%29.88 inHg

Friday

12:00 AM

Overcast night

58° 💧 None 💨 1 mph H 59%29.85 inHg

3:00 AM

Overcast night

56° 💧 None 💨 1 mph H 59%29.85 inHg

6:00 AM

Overcast night

54° 💧 None 💨 1 mph H 62%29.83 inHg

9:00 AM

Overcast

58° 💧 None 💨 3 mph H 55%29.80 inHg

12:00 PM

Mostly sunny

71° 💧 None 💨 0 mph H 38%29.74 inHg

3:00 PM

Mostly sunny

79° 💧 None 💨 6 mph H 24%29.62 inHg

6:00 PM

Mostly sunny

75° 💧 None 💨 11 mph H 28%29.59 inHg

9:00 PM

Mostly clear night

65° 💧 None 💨 12 mph H 41%29.65 inHg

Saturday

12:00 AM

Mostly clear night

58° 💧 None 💨 4 mph H 49%29.68 inHg

3:00 AM

Partly cloudy night

55° 💧 None 💨 3 mph H 55%29.80 inHg

6:00 AM

Clear night

51° 💧 None 💨 1 mph H 67%29.88 inHg

9:00 AM

Mostly sunny

52° 💧 None 💨 3 mph H 62%29.97 inHg

12:00 PM

Mostly sunny

62° 💧 None 💨 7 mph H 30%29.94 inHg

3:00 PM

Partly cloudy

66° 💧 None 💨 2 mph H 27%29.85 inHg

6:00 PM

Partly cloudy

64° 💧 None 💨 5 mph H 32%29.85 inHg

9:00 PM

Partly cloudy night

51° 💧 None 💨 2 mph H 46%29.97 inHg

Sunday

12:00 AM

Mostly cloudy night

49° 💧 None 💨 1 mph H 44%30.03 inHg

3:00 AM

Mostly cloudy night

48° 💧 None 💨 0 mph H 45%30.03 inHg

6:00 AM

Partly cloudy night

48° 💧 None 💨 0 mph H 48%30.03 inHg

9:00 AM

Mostly sunny

49° 💧 None 💨 1 mph H 41%30.06 inHg

12:00 PM

Partly cloudy

56° 💧 None 💨 3 mph H 36%30.00 inHg

3:00 PM

Mostly cloudy

64° 💧 None 💨 3 mph H 32%29.91 inHg

6:00 PM

Mostly cloudy

63° 💧 None 💨 2 mph H 35%29.88 inHg

Monday

12:00 AM

Overcast night

56° 💧 None 💨 0 mph H 46%29.91 inHg

6:00 AM

Mostly cloudy night

50° 💧 None 💨 3 mph H 59%29.91 inHg

12:00 PM

Mostly sunny

61° 💧 None 💨 3 mph H 45%29.91 inHg

6:00 PM

Light rain

62° 💧 None 💨 5 mph H 54%29.83 inHg

Tuesday

12:00 AM

Clear night

50° 💧 None 💨 2 mph H 74%29.85 inHg

6:00 AM

Clear night

48° 💧 None 💨 1 mph H 68%29.88 inHg

12:00 PM

Partly cloudy

63° 💧 None 💨 2 mph H 42%29.88 inHg

6:00 PM

Sunny

68° 💧 None 💨 3 mph H 33%29.77 inHg

Wednesday

12:00 AM

Clear night

55° 💧 None 💨 7 mph H 53%29.80 inHg

6:00 AM

Partly cloudy night

51° 💧 None 💨 1 mph H 54%29.80 inHg

12:00 PM

Sunny

71° 💧 None 💨 7 mph H 27%29.77 inHg

6:00 PM

Mostly sunny

73° 💧 None 💨 8 mph H 23%29.65 inHg

Thursday

12:00 AM

Clear night

56° 💧 None 💨 1 mph H 44%29.80 inHg

6:00 AM

Clear night

50° 💧 None 💨 2 mph H 56%29.80 inHg

12:00 PM

Sunny

64° 💧 None 💨 4 mph H 35%29.77 inHg

6:00 PM

Partly cloudy

68° 💧 None 💨 4 mph H 47%29.68 inHg

Friday

12:00 AM

Clear night

54° 💧 None 💨 1 mph H 65%29.80 inHg

6:00 AM

Overcast night

51° 💧 None 💨 2 mph H 65%29.85 inHg

12:00 PM

Overcast

55° 💧 None 💨 5 mph H 63%29.88 inHg

6:00 PM

Overcast

57° 💧 None 💨 5 mph H 59%29.85 inHg

Saturday

12:00 AM

Overcast night

53° 💧 None 💨 2 mph H 71%29.94 inHg

6:00 AM

Clear night

44° 💧 None 💨 2 mph H 79%30.06 inHg

12:00 PM

Sunny

59° 💧 None 💨 4 mph H 30%30.18 inHg

6:00 PM

Sunny

60° 💧 None 💨 5 mph H 31%30.15 inHg

Sunday

12:00 AM

Clear night

47° 💧 None 💨 2 mph H 53%30.27 inHg

6:00 AM

Clear night

42° 💧 None 💨 1 mph H 69%30.27 inHg

12:00 PM

Sunny

55° 💧 None 💨 1 mph H 41%30.21 inHg

6:00 PM

Partly cloudy

65° 💧 None 💨 1 mph H 43%30.00 inHg

Monday

12:00 AM

Partly cloudy night

55° 💧 None 💨 0 mph H 45%30.00 inHg

6:00 AM

Mostly clear night

53° 💧 None 💨 1 mph H 43%30.03 inHg

12:00 PM

Sunny

68° 💧 None 💨 2 mph H 29%30.06 inHg

6:00 PM

Partly cloudy

70° 💧 None 💨 2 mph H 38%30.00 inHg

Tuesday

12:00 AM

Clear night

56° 💧 None 💨 1 mph H 45%30.06 inHg

6:00 AM

Clear night

52° 💧 None 💨 1 mph H 47%30.12 inHg

12:00 PM

Sunny

68° 💧 None 💨 2 mph H 30%30.12 inHg

6:00 PM

Sunny

73° 💧 None 💨 0 mph H 41%29.97 inHg

In Harrison and, more broadly, across the state of Montana: Clear skies will continue through the evening with temperatures remaining mild around 65 degrees. Winds will be light, coming from the south at no more than 5 mph, with occasional gusts reaching up to 11 mph. No precipitation is expected overnight, so conditions will remain dry and calm. Residents can expect a peaceful night with mild temperatures and gentle breezes.

15-Day Weather Outlook for Harrison

TomorrowTomorrow

Strong thunderstorm 67°/49° 💧 None 💨 6 mph

Thursday, Sep 24Thu Sep 24

Mostly cloudy 70°/50° 💧 0.016 in 💨 4 mph

Friday, Sep 25Fri Sep 25

Overcast 79°/54° 💧 0.005 in 💨 12 mph

Saturday, Sep 26Sat Sep 26

Mostly sunny 66°/51° 💧 None 💨 7 mph

Sunday, Sep 27Sun Sep 27

Mostly cloudy 64°/48° 💧 None 💨 3 mph

Monday, Sep 28Mon Sep 28

Light rain 62°/50° 💧 0.018 in 💨 5 mph

Tuesday, Sep 29Tue Sep 29

Partly cloudy 68°/48° 💧 0.014 in 💨 3 mph

Wednesday, Sep 30Wed Sep 30

Partly cloudy 73°/51° 💧 None 💨 8 mph

Thursday, Oct 1Thu Oct 1

Partly cloudy 68°/50° 💧 0.012 in 💨 4 mph

Friday, Oct 2Fri Oct 2

Overcast 57°/51° 💧 0.022 in 💨 5 mph

Saturday, Oct 3Sat Oct 3

Overcast 60°/44° 💧 None 💨 5 mph

Sunday, Oct 4Sun Oct 4

Partly cloudy 65°/42° 💧 None 💨 2 mph

Monday, Oct 5Mon Oct 5

Partly cloudy 70°/53° 💧 None 💨 2 mph

Tuesday, Oct 6Tue Oct 6

Sunny 73°/52° 💧 None 💨 2 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Harrison

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Harrison

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 3:00 AM

PM2.5 Fine particles Good 1,6µg/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 1,9µg/m³

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

O₃ Ozone Good 48,1µg/m³

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

NO₂ Nitrogen dioxide Good 3,2µg/m³

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

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Harrison

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 5,6Moderate 😊Good

Tomorrow UV 5,4Moderate 🙂Fair

Thursday UV 5,4Moderate 🙂Fair

Friday UV 4,9Moderate 🙂Fair

Saturday UV 4,0Moderate 🙂Fair

Sunday UV 4,0Moderate —Unavailable

Monday UV 4,0Moderate —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,0 9:00 AMUV 0,6 10:00 AMUV 1,7 11:00 AMUV 2,8 12:00 PMUV 4,4 1:00 PMUV 5,5 2:00 PMUV 5,6 3:00 PMUV 4,6 4:00 PMUV 3,1 5:00 PMUV 1,6 6:00 PMUV 0,4

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

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

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 Harrison

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · HARRISON, MONTANA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 5:00 AM–6:00 AM.

85/100Best-hour score

BEST TIME TONIGHT 5:00 AM–6:00 AM Astronomical darkness: 9:07 PM–5:34 AM

☁ Cloud cover 21% Real hourly forecast for the best viewing hour.

☾ Moonlight 82% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · 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 min66%

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

SEP 20–NOV 20

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

ACTIVE NOW

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

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% 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.

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Forecast data for Harrison were last refreshed today at 2:06 AM. The current forecast period extends through 24/09/2026 at 12:00 AM. 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.