What is the weather in Big Arm right now?

Current weather in Big Arm is overcast clouds.

Where can I find the hourly weather forecast for Big Arm?

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

Is the weather forecast for Big Arm updated regularly?

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

Now · 10:25 AM

Big Arm Weather & Hourly Forecast

United States · Montana · 59860

63°F

Overcast

Feels like: 61°F

💧 Humidity 54% 🌡 Pressure 29.88 inHg 💨 Wind 2 mph 👁 Visibility 22.7 mi ☁ Clouds 100% ☀️ UV index 1.2 · Low 🌅 Sunrise 7:22 AM 🌇 Sunset 7:36 PM

Hourly Forecast for Big Arm

Today

11:00 AM

Overcast

65° 💧 None 💨 2 mph H 48%29.91 inHg

2:00 PM

Overcast

72° 💧 None 💨 3 mph H 40%29.85 inHg

5:00 PM

Overcast

73° 💧 None 💨 2 mph H 38%29.80 inHg

8:00 PM

Mostly cloudy night

66° 💧 0.000 in 💨 1 mph H 62%29.83 inHg

11:00 PM

Overcast night

63° 💧 None 💨 1 mph H 63%29.88 inHg

Tomorrow

2:00 AM

Mostly clear night

58° 💧 0.000 in 💨 1 mph H 74%29.91 inHg

5:00 AM

Partly cloudy night

54° 💧 None 💨 1 mph H 89%29.94 inHg

8:00 AM

Sunny

52° 💧 None 💨 2 mph H 87%30.03 inHg

11:00 AM

Mostly sunny

63° 💧 None 💨 6 mph H 54%30.06 inHg

2:00 PM

Mostly cloudy

70° 💧 None 💨 7 mph H 32%30.00 inHg

5:00 PM

Mostly cloudy

72° 💧 None 💨 5 mph H 28%29.97 inHg

8:00 PM

Partly cloudy night

63° 💧 None 💨 1 mph H 50%29.97 inHg

11:00 PM

Clear night

58° 💧 None 💨 0 mph H 60%30.03 inHg

Thursday

2:00 AM

Mostly cloudy night

58° 💧 None 💨 0 mph H 56%30.03 inHg

5:00 AM

Mostly clear night

57° 💧 None 💨 1 mph H 70%30.00 inHg

8:00 AM

Fog

55° 💧 None 💨 2 mph H 81%30.03 inHg

Today

11:00 AM

Overcast

65° 💧 None 💨 2 mph H 48%29.91 inHg

12:00 PM

Overcast

68° 💧 None 💨 3 mph H 44%29.88 inHg

1:00 PM

Overcast

70° 💧 None 💨 3 mph H 42%29.88 inHg

2:00 PM

Overcast

72° 💧 None 💨 3 mph H 40%29.85 inHg

3:00 PM

Overcast

73° 💧 None 💨 4 mph H 38%29.83 inHg

4:00 PM

Overcast

74° 💧 None 💨 3 mph H 37%29.83 inHg

5:00 PM

Overcast

73° 💧 None 💨 2 mph H 38%29.80 inHg

6:00 PM

Mostly cloudy

72° 💧 None 💨 3 mph H 45%29.80 inHg

7:00 PM

Mostly cloudy

68° 💧 None 💨 2 mph H 57%29.83 inHg

8:00 PM

Mostly cloudy night

66° 💧 0.000 in 💨 1 mph H 62%29.83 inHg

9:00 PM

Overcast night

64° 💧 None 💨 0 mph H 65%29.85 inHg

10:00 PM

Overcast night

64° 💧 None 💨 1 mph H 63%29.85 inHg

11:00 PM

Overcast night

63° 💧 None 💨 1 mph H 63%29.88 inHg

Tomorrow

12:00 AM

Mostly cloudy night

62° 💧 None 💨 1 mph H 64%29.88 inHg

1:00 AM

Partly cloudy night

60° 💧 None 💨 1 mph H 68%29.88 inHg

2:00 AM

Mostly clear night

58° 💧 None 💨 1 mph H 74%29.91 inHg

3:00 AM

Clear night

56° 💧 None 💨 1 mph H 82%29.91 inHg

4:00 AM

Clear night

55° 💧 0.000 in 💨 1 mph H 87%29.94 inHg

5:00 AM

Partly cloudy night

54° 💧 None 💨 1 mph H 89%29.94 inHg

6:00 AM

Mostly clear night

53° 💧 None 💨 2 mph H 89%29.97 inHg

7:00 AM

Mostly clear night

51° 💧 None 💨 2 mph H 87%30.00 inHg

8:00 AM

Sunny

52° 💧 None 💨 2 mph H 87%30.03 inHg

9:00 AM

Sunny

56° 💧 None 💨 3 mph H 78%30.03 inHg

10:00 AM

Mostly sunny

59° 💧 None 💨 4 mph H 65%30.06 inHg

11:00 AM

Mostly sunny

63° 💧 None 💨 6 mph H 54%30.06 inHg

12:00 PM

Mostly sunny

66° 💧 None 💨 7 mph H 42%30.06 inHg

1:00 PM

Mostly sunny

68° 💧 None 💨 7 mph H 35%30.03 inHg

2:00 PM

Mostly cloudy

70° 💧 None 💨 7 mph H 32%30.00 inHg

3:00 PM

Mostly cloudy

71° 💧 None 💨 6 mph H 31%30.00 inHg

4:00 PM

Mostly cloudy

72° 💧 None 💨 5 mph H 29%29.97 inHg

5:00 PM

Mostly cloudy

72° 💧 None 💨 5 mph H 28%29.97 inHg

6:00 PM

Mostly cloudy

70° 💧 None 💨 4 mph H 33%29.97 inHg

7:00 PM

Mostly cloudy

66° 💧 None 💨 2 mph H 47%29.97 inHg

8:00 PM

Partly cloudy night

63° 💧 None 💨 1 mph H 50%29.97 inHg

9:00 PM

Clear night

60° 💧 None 💨 1 mph H 52%30.00 inHg

10:00 PM

Clear night

59° 💧 None 💨 0 mph H 58%30.00 inHg

11:00 PM

Clear night

58° 💧 None 💨 0 mph H 60%30.03 inHg

Thursday

12:00 AM

Mostly cloudy night

58° 💧 None 💨 1 mph H 62%30.03 inHg

1:00 AM

Mostly cloudy night

58° 💧 None 💨 0 mph H 61%30.03 inHg

2:00 AM

Mostly cloudy night

58° 💧 None 💨 0 mph H 56%30.03 inHg

3:00 AM

Partly cloudy night

58° 💧 None 💨 1 mph H 57%30.00 inHg

4:00 AM

Partly cloudy night

57° 💧 None 💨 1 mph H 64%30.00 inHg

5:00 AM

Mostly clear night

57° 💧 None 💨 1 mph H 70%30.00 inHg

6:00 AM

Fog at night

56° 💧 None 💨 2 mph H 76%30.00 inHg

7:00 AM

Fog at night

55° 💧 None 💨 2 mph H 80%30.03 inHg

8:00 AM

Fog

55° 💧 None 💨 2 mph H 81%30.03 inHg

9:00 AM

Fog

59° 💧 None 💨 3 mph H 73%30.03 inHg

10:00 AM

Partly cloudy

61° 💧 None 💨 3 mph H 61%30.00 inHg

11:00 AM

Mostly cloudy

64° 💧 None 💨 3 mph H 53%30.00 inHg

12:00 PM

Partly cloudy

66° 💧 None 💨 2 mph H 49%29.97 inHg

1:00 PM

Partly cloudy

68° 💧 None 💨 2 mph H 44%29.94 inHg

2:00 PM

Mostly sunny

70° 💧 None 💨 2 mph H 42%29.91 inHg

3:00 PM

Sunny

72° 💧 None 💨 2 mph H 41%29.88 inHg

4:00 PM

Sunny

73° 💧 None 💨 2 mph H 40%29.85 inHg

5:00 PM

Sunny

74° 💧 None 💨 3 mph H 40%29.83 inHg

6:00 PM

Sunny

72° 💧 None 💨 3 mph H 44%29.80 inHg

Friday

3:00 AM

Clear night

58° 💧 None 💨 2 mph H 92%29.71 inHg

6:00 AM

Clear night

56° 💧 None 💨 2 mph H 92%29.68 inHg

9:00 AM

Partly cloudy

60° 💧 None 💨 1 mph H 92%29.65 inHg

12:00 PM

Mostly sunny

72° 💧 None 💨 4 mph H 42%29.62 inHg

3:00 PM

Partly cloudy

80° 💧 None 💨 7 mph H 26%29.53 inHg

6:00 PM

Partly cloudy

70° 💧 None 💨 14 mph H 41%29.59 inHg

9:00 PM

Moderate rain

56° 💧 None 💨 7 mph H 88%29.80 inHg

Saturday

12:00 AM

Mostly clear night

53° 💧 None 💨 14 mph H 67%29.83 inHg

3:00 AM

Overcast night

48° 💧 None 💨 14 mph H 75%29.91 inHg

6:00 AM

Overcast night

48° 💧 None 💨 15 mph H 71%30.00 inHg

9:00 AM

Mostly cloudy

49° 💧 None 💨 15 mph H 64%30.06 inHg

12:00 PM

Mostly sunny

54° 💧 None 💨 14 mph H 47%30.03 inHg

3:00 PM

Partly cloudy

57° 💧 None 💨 14 mph H 39%30.00 inHg

6:00 PM

Sunny

56° 💧 None 💨 10 mph H 41%30.00 inHg

9:00 PM

Clear night

49° 💧 None 💨 3 mph H 56%30.03 inHg

Sunday

12:00 AM

Partly cloudy night

48° 💧 None 💨 0 mph H 59%30.03 inHg

3:00 AM

Partly cloudy night

44° 💧 None 💨 2 mph H 74%30.03 inHg

6:00 AM

Overcast night

42° 💧 None 💨 1 mph H 90%30.03 inHg

9:00 AM

Overcast

47° 💧 None 💨 1 mph H 79%30.03 inHg

12:00 PM

Overcast

54° 💧 None 💨 1 mph H 59%30.00 inHg

3:00 PM

Partly cloudy

59° 💧 None 💨 0 mph H 40%29.91 inHg

6:00 PM

Partly cloudy

59° 💧 None 💨 3 mph H 40%29.88 inHg

9:00 PM

Mostly clear night

53° 💧 None 💨 2 mph H 69%29.88 inHg

Monday

12:00 AM

Mostly cloudy night

54° 💧 None 💨 1 mph H 76%29.91 inHg

6:00 AM

Overcast night

52° 💧 None 💨 2 mph H 73%29.94 inHg

12:00 PM

Mostly sunny

49° 💧 None 💨 0 mph H 74%29.94 inHg

6:00 PM

Sunny

59° 💧 None 💨 1 mph H 56%29.94 inHg

Tuesday

12:00 AM

Clear night

66° 💧 None 💨 2 mph H 36%29.83 inHg

6:00 AM

Clear night

54° 💧 None 💨 2 mph H 69%29.88 inHg

12:00 PM

Mostly cloudy

47° 💧 None 💨 2 mph H 72%29.88 inHg

6:00 PM

Partly cloudy

62° 💧 None 💨 6 mph H 41%29.88 inHg

Wednesday

12:00 AM

Clear night

67° 💧 None 💨 7 mph H 32%29.74 inHg

6:00 AM

Mostly clear night

57° 💧 None 💨 0 mph H 40%29.74 inHg

12:00 PM

Sunny

51° 💧 None 💨 1 mph H 64%29.74 inHg

6:00 PM

Sunny

65° 💧 None 💨 9 mph H 36%29.80 inHg

Thursday

12:00 AM

Overcast night

65° 💧 None 💨 7 mph H 39%29.80 inHg

6:00 AM

Mostly cloudy night

52° 💧 None 💨 3 mph H 78%29.85 inHg

12:00 PM

Mostly cloudy

50° 💧 None 💨 1 mph H 82%29.83 inHg

6:00 PM

Mostly cloudy

60° 💧 None 💨 2 mph H 58%29.85 inHg

Friday

12:00 AM

Partly cloudy night

65° 💧 None 💨 3 mph H 44%29.83 inHg

6:00 AM

Mostly clear night

52° 💧 None 💨 3 mph H 81%29.91 inHg

12:00 PM

Mostly sunny

48° 💧 None 💨 3 mph H 77%29.91 inHg

6:00 PM

Mostly sunny

58° 💧 None 💨 2 mph H 53%29.94 inHg

Saturday

12:00 AM

Clear night

63° 💧 None 💨 3 mph H 40%29.85 inHg

6:00 AM

Partly cloudy night

50° 💧 None 💨 2 mph H 66%30.00 inHg

12:00 PM

Sunny

44° 💧 None 💨 3 mph H 72%30.15 inHg

6:00 PM

Sunny

57° 💧 None 💨 5 mph H 39%30.24 inHg

Sunday

12:00 AM

Partly cloudy night

61° 💧 None 💨 3 mph H 36%30.18 inHg

6:00 AM

Mostly clear night

52° 💧 None 💨 0 mph H 71%30.21 inHg

12:00 PM

Mostly cloudy

49° 💧 None 💨 0 mph H 75%30.21 inHg

6:00 PM

Mostly sunny

60° 💧 None 💨 1 mph H 39%30.15 inHg

Monday

12:00 AM

Overcast night

66° 💧 None 💨 1 mph H 47%29.97 inHg

6:00 AM

Mostly cloudy night

56° 💧 None 💨 2 mph H 49%29.97 inHg

12:00 PM

Sunny

51° 💧 None 💨 1 mph H 60%30.03 inHg

6:00 PM

Mostly sunny

65° 💧 None 💨 3 mph H 34%30.09 inHg

Tuesday

12:00 AM

Partly cloudy night

70° 💧 None 💨 1 mph H 46%30.00 inHg

6:00 AM

Clear night

57° 💧 None 💨 1 mph H 79%30.03 inHg

12:00 PM

Sunny

53° 💧 None 💨 0 mph H 78%30.06 inHg

6:00 PM

Mostly sunny

66° 💧 None 💨 1 mph H 40%30.06 inHg

Wednesday

12:00 AM

Partly cloudy night

72° 💧 None 💨 2 mph H 51%29.94 inHg

In Big Arm and, more broadly, across the state of Montana: Clear skies are expected tonight with temperatures holding steady around 62 degrees. Light southeast winds will prevail, generally blowing at 3 to 5 mph, with occasional gusts reaching up to 10 mph. No precipitation is forecasted for the evening and the upcoming hours. It will remain a cool and tranquil night, making it a good time to enjoy the clear sky and gentle breeze. Temperatures are unlikely to fluctuate significantly through the evening, providing a calm and comfortable environment.

15-Day Weather Outlook for Big Arm

TomorrowTomorrow

Mostly cloudy 72°/51° 💧 None 💨 7 mph

Thursday, Sep 24Thu Sep 24

Mostly cloudy 74°/55° 💧 0.001 in 💨 3 mph

Friday, Sep 25Fri Sep 25

Mostly cloudy 79°/57° 💧 0.020 in 💨 14 mph

Saturday, Sep 26Sat Sep 26

Mostly sunny 57°/49° 💧 None 💨 17 mph

Sunday, Sep 27Sun Sep 27

Mostly sunny 59°/43° 💧 None 💨 3 mph

Monday, Sep 28Mon Sep 28

Overcast 66°/49° 💧 None 💨 2 mph

Tuesday, Sep 29Tue Sep 29

Mostly cloudy 67°/47° 💧 None 💨 7 mph

Wednesday, Sep 30Wed Sep 30

Mostly sunny 65°/51° 💧 0.001 in 💨 9 mph

Thursday, Oct 1Thu Oct 1

Mostly cloudy 65°/50° 💧 None 💨 3 mph

Friday, Oct 2Fri Oct 2

Mostly sunny 63°/48° 💧 None 💨 3 mph

Saturday, Oct 3Sat Oct 3

Partly cloudy 61°/44° 💧 None 💨 5 mph

Sunday, Oct 4Sun Oct 4

Mostly sunny 66°/49° 💧 None 💨 1 mph

Monday, Oct 5Mon Oct 5

Mostly cloudy 70°/51° 💧 None 💨 3 mph

Tuesday, Oct 6Tue Oct 6

Mostly sunny 72°/53° 💧 None 💨 2 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Big Arm

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Big Arm

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 11:00 AM

PM2.5 Fine particles Good 1,4µg/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 1,7µg/m³

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

O₃ Ozone Good 49,8µg/m³

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

NO₂ Nitrogen dioxide Good 1,9µg/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 Big Arm

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 4,2Moderate 😊Good

Tomorrow UV 4,3Moderate 🙂Fair

Thursday UV 4,2Moderate 🙂Fair

Friday UV 3,2Moderate 🙂Fair

Saturday UV 4,0Moderate 🙂Fair

Sunday UV 3,0Moderate —Unavailable

Monday UV 5,0Moderate —Unavailable

Hourly UV index today

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

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 Big Arm

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · BIG ARM, MONTANA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 4:00 AM–5:00 AM.

99/100Best-hour score

BEST TIME TONIGHT 4:00 AM–5:00 AM Astronomical darkness: 9:19 PM–5:41 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 89% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 55° high at the best hour.

✦ Estimated visible meteors 1–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min70%

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.

DISCOVER WEATHER NEARBY Weather in other cities

Explore current conditions and forecasts for other locations.

North Ipswich AU · Queensland · 4,527 residents Whiteville US · North Carolina · 4,696 residents Mosman AU · New South Wales · 28,329 residents Gamewell US · North Carolina · 3,689 residents Norwood (Tas.) AU · Tasmania · 3,869 residents Eglin AFB US · Florida · 2,778 residents Renville US · Minnesota · 1,503 residents Hampton US · New Hampshire · 10,101 residents Teays Valley US · West Virginia · 14,151 residents Freestone AU · Queensland · 208 residents Como (WA) AU · Western Australia · 14,786 residents Ste. Anne CA · Manitoba · 2,891 residents Neilburg CA · Saskatchewan · 371 residents Tumalo US · Oregon · 662 residents Broomfield US · Colorado · 76,304 residents Erie US · Pennsylvania · 93,850 residents

Forecast data for Big Arm were last refreshed today at 10:25 AM. The current forecast period extends through 24/09/2026 at 8:00 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.