What is the weather in Boulder right now?

Current weather in Boulder is few clouds.

Where can I find the hourly weather forecast for Boulder?

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

Is the weather forecast for Boulder updated regularly?

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

Now · 9:24 PM

Boulder Weather & Hourly Forecast

United States · Montana · 59632

49°F

Mostly clear night

Feels like: 45°F

💧 Humidity 77% 🌡 Pressure 30.18 inHg 💨 Wind 3 mph 👁 Visibility 21.6 mi ☁ Clouds 20% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Boulder

Today

10:00 PM

Partly cloudy night

46° 💧 None 💨 3 mph H 86%30.21 inHg

Tomorrow

1:00 AM

Partly cloudy night

42° 💧 None 💨 1 mph H 89%30.21 inHg

4:00 AM

Mostly cloudy night

42° 💧 None 💨 1 mph H 86%30.18 inHg

7:00 AM

Overcast night

44° 💧 None 💨 1 mph H 82%30.15 inHg

10:00 AM

Mostly cloudy

56° 💧 None 💨 2 mph H 56%30.12 inHg

1:00 PM

Partly cloudy

69° 💧 0.000 in 💨 6 mph H 38%30.00 inHg

4:00 PM

Mostly sunny

73° 💧 0.001 in 💨 8 mph H 35%29.91 inHg

7:00 PM

Light rain

63° 💧 0.018 in 💨 3 mph H 64%29.91 inHg

10:00 PM

Light rain

52° 💧 0.018 in 💨 3 mph H 98%30.03 inHg

Friday

1:00 AM

Mostly cloudy night

48° 💧 None 💨 1 mph H 98%30.03 inHg

4:00 AM

Mist at night

45° 💧 None 💨 2 mph H 98%30.03 inHg

7:00 AM

Mostly cloudy night

44° 💧 0.004 in 💨 2 mph H 95%30.06 inHg

10:00 AM

Light thunderstorms

53° 💧 0.013 in 💨 1 mph H 90%30.12 inHg

1:00 PM

Partly cloudy

67° 💧 0.024 in 💨 1 mph H 43%30.03 inHg

4:00 PM

Light thunderstorms

65° 💧 0.027 in 💨 2 mph H 47%30.00 inHg

7:00 PM

Overcast

58° 💧 0.003 in 💨 6 mph H 68%30.06 inHg

Today

10:00 PM

Partly cloudy night

46° 💧 None 💨 3 mph H 86%30.21 inHg

11:00 PM

Partly cloudy night

44° 💧 None 💨 2 mph H 89%30.21 inHg

Tomorrow

12:00 AM

Partly cloudy night

43° 💧 None 💨 2 mph H 90%30.21 inHg

1:00 AM

Partly cloudy night

42° 💧 None 💨 1 mph H 89%30.21 inHg

2:00 AM

Partly cloudy night

42° 💧 None 💨 1 mph H 88%30.21 inHg

3:00 AM

Mostly clear night

42° 💧 None 💨 1 mph H 87%30.18 inHg

4:00 AM

Mostly cloudy night

42° 💧 None 💨 1 mph H 86%30.18 inHg

5:00 AM

Mostly cloudy night

42° 💧 None 💨 1 mph H 85%30.15 inHg

6:00 AM

Overcast night

42° 💧 None 💨 1 mph H 84%30.15 inHg

7:00 AM

Overcast night

44° 💧 None 💨 1 mph H 82%30.15 inHg

8:00 AM

Mostly cloudy

46° 💧 None 💨 1 mph H 79%30.15 inHg

9:00 AM

Mostly cloudy

51° 💧 None 💨 1 mph H 67%30.15 inHg

10:00 AM

Mostly cloudy

56° 💧 None 💨 2 mph H 56%30.12 inHg

11:00 AM

Mostly cloudy

60° 💧 None 💨 4 mph H 48%30.09 inHg

12:00 PM

Mostly cloudy

65° 💧 None 💨 5 mph H 42%30.06 inHg

1:00 PM

Partly cloudy

69° 💧 None 💨 6 mph H 38%30.00 inHg

2:00 PM

Mostly sunny

71° 💧 0.000 in 💨 6 mph H 35%29.94 inHg

3:00 PM

Mostly sunny

72° 💧 None 💨 7 mph H 35%29.94 inHg

4:00 PM

Mostly sunny

73° 💧 None 💨 8 mph H 35%29.91 inHg

5:00 PM

Mostly sunny

72° 💧 0.000 in 💨 7 mph H 36%29.91 inHg

6:00 PM

Mostly cloudy

70° 💧 0.001 in 💨 7 mph H 38%29.91 inHg

7:00 PM

Light rain

63° 💧 0.010 in 💨 3 mph H 64%29.91 inHg

8:00 PM

Mostly cloudy night

59° 💧 0.002 in 💨 1 mph H 68%29.94 inHg

9:00 PM

Light rain

54° 💧 0.006 in 💨 5 mph H 90%30.00 inHg

10:00 PM

Light rain

52° 💧 0.016 in 💨 3 mph H 98%30.03 inHg

11:00 PM

Clear night

51° 💧 0.001 in 💨 2 mph H 97%30.03 inHg

Friday

12:00 AM

Clear night

49° 💧 0.001 in 💨 1 mph H 98%30.03 inHg

1:00 AM

Mostly cloudy night

48° 💧 None 💨 1 mph H 98%30.03 inHg

2:00 AM

Mostly cloudy night

47° 💧 None 💨 1 mph H 97%30.03 inHg

3:00 AM

Mostly cloudy night

46° 💧 None 💨 2 mph H 98%30.03 inHg

4:00 AM

Mist at night

45° 💧 None 💨 2 mph H 98%30.03 inHg

5:00 AM

Mist at night

45° 💧 None 💨 2 mph H 97%30.06 inHg

6:00 AM

Mostly cloudy night

45° 💧 None 💨 2 mph H 96%30.06 inHg

7:00 AM

Mostly cloudy night

44° 💧 None 💨 2 mph H 95%30.06 inHg

8:00 AM

Mostly cloudy

46° 💧 None 💨 2 mph H 94%30.09 inHg

9:00 AM

Light thunderstorms

51° 💧 0.004 in 💨 1 mph H 91%30.12 inHg

10:00 AM

Light thunderstorms

53° 💧 0.012 in 💨 1 mph H 90%30.12 inHg

11:00 AM

Mostly sunny

61° 💧 0.001 in 💨 1 mph H 64%30.09 inHg

12:00 PM

Partly cloudy

65° 💧 0.000 in 💨 2 mph H 51%30.06 inHg

1:00 PM

Partly cloudy

67° 💧 0.001 in 💨 1 mph H 43%30.03 inHg

2:00 PM

Light rain

68° 💧 0.004 in 💨 4 mph H 38%30.00 inHg

3:00 PM

Light thunderstorms

65° 💧 0.019 in 💨 5 mph H 47%30.00 inHg

4:00 PM

Light thunderstorms

65° 💧 0.009 in 💨 2 mph H 47%30.00 inHg

5:00 PM

Light thunderstorms

59° 💧 0.016 in 💨 7 mph H 73%30.06 inHg

6:00 PM

Overcast

59° 💧 0.002 in 💨 3 mph H 68%30.03 inHg

7:00 PM

Overcast

58° 💧 0.000 in 💨 6 mph H 68%30.06 inHg

8:00 PM

Overcast night

54° 💧 0.001 in 💨 2 mph H 78%30.09 inHg

9:00 PM

Overcast night

52° 💧 0.002 in 💨 3 mph H 84%30.09 inHg

10:00 PM

Overcast night

50° 💧 0.002 in 💨 4 mph H 92%30.09 inHg

11:00 PM

Overcast night

50° 💧 0.001 in 💨 2 mph H 94%30.09 inHg

Saturday

12:00 AM

Light rain

50° 💧 0.044 in 💨 1 mph H 93%30.09 inHg

1:00 AM

Light rain

50° 💧 0.054 in 💨 2 mph H 96%30.09 inHg

2:00 AM

Light rain

50° 💧 0.040 in 💨 3 mph H 96%30.09 inHg

3:00 AM

Light rain

50° 💧 0.097 in 💨 4 mph H 97%30.09 inHg

4:00 AM

Moderate rain

49° 💧 0.113 in 💨 4 mph H 98%30.09 inHg

5:00 AM

Moderate rain

49° 💧 0.115 in 💨 4 mph H 98%30.09 inHg

6:00 AM

Light rain

49° 💧 0.083 in 💨 5 mph H 98%30.09 inHg

3:00 PM

Moderate rain

51° 💧 None 💨 6 mph H 95%30.12 inHg

6:00 PM

Light rain

51° 💧 None 💨 3 mph H 96%30.12 inHg

9:00 PM

Mostly cloudy night

47° 💧 None 💨 1 mph H 97%30.12 inHg

Sunday

12:00 AM

Mostly clear night

44° 💧 None 💨 1 mph H 96%30.12 inHg

3:00 AM

Partly cloudy night

42° 💧 None 💨 1 mph H 97%30.12 inHg

6:00 AM

Mostly clear night

40° 💧 None 💨 1 mph H 96%30.15 inHg

9:00 AM

Partly cloudy

46° 💧 None 💨 1 mph H 97%30.15 inHg

12:00 PM

Mostly sunny

60° 💧 None 💨 2 mph H 49%30.09 inHg

3:00 PM

Mostly sunny

65° 💧 None 💨 1 mph H 36%30.03 inHg

6:00 PM

Sunny

62° 💧 None 💨 3 mph H 40%30.03 inHg

9:00 PM

Clear night

50° 💧 None 💨 1 mph H 72%30.06 inHg

Monday

12:00 AM

Clear night

46° 💧 None 💨 1 mph H 78%30.09 inHg

3:00 AM

Clear night

43° 💧 None 💨 1 mph H 80%30.09 inHg

6:00 AM

Clear night

43° 💧 None 💨 1 mph H 77%30.06 inHg

9:00 AM

Sunny

50° 💧 None 💨 1 mph H 69%30.09 inHg

12:00 PM

Sunny

63° 💧 None 💨 4 mph H 43%30.00 inHg

3:00 PM

Sunny

67° 💧 None 💨 6 mph H 34%29.91 inHg

6:00 PM

Partly cloudy

64° 💧 None 💨 4 mph H 39%29.88 inHg

9:00 PM

Partly cloudy night

53° 💧 None 💨 2 mph H 62%29.91 inHg

Tuesday

12:00 AM

Mostly clear night

47° 💧 None 💨 1 mph H 70%29.91 inHg

3:00 AM

Clear night

45° 💧 None 💨 1 mph H 71%29.91 inHg

6:00 AM

Clear night

43° 💧 None 💨 1 mph H 71%29.91 inHg

9:00 AM

Sunny

51° 💧 None 💨 1 mph H 60%29.91 inHg

12:00 PM

Mostly sunny

66° 💧 None 💨 2 mph H 35%29.88 inHg

6:00 PM

Mostly sunny

66° 💧 None 💨 3 mph H 35%29.88 inHg

Wednesday

12:00 AM

Partly cloudy night

66° 💧 None 💨 1 mph H 39%29.85 inHg

6:00 AM

Mostly clear night

47° 💧 None 💨 2 mph H 72%29.94 inHg

12:00 PM

Sunny

43° 💧 None 💨 1 mph H 76%30.00 inHg

6:00 PM

Mostly sunny

66° 💧 None 💨 4 mph H 35%30.00 inHg

Thursday

12:00 AM

Mostly clear night

67° 💧 None 💨 3 mph H 31%30.00 inHg

6:00 AM

Clear night

49° 💧 None 💨 1 mph H 63%30.15 inHg

12:00 PM

Sunny

44° 💧 None 💨 1 mph H 72%30.21 inHg

6:00 PM

Mostly sunny

65° 💧 None 💨 4 mph H 36%30.21 inHg

Friday

12:00 AM

Clear night

67° 💧 None 💨 3 mph H 30%30.12 inHg

6:00 AM

Clear night

51° 💧 None 💨 1 mph H 51%30.21 inHg

12:00 PM

Sunny

47° 💧 None 💨 1 mph H 69%30.21 inHg

6:00 PM

Sunny

68° 💧 None 💨 5 mph H 37%30.15 inHg

Saturday

12:00 AM

Clear night

69° 💧 None 💨 6 mph H 33%30.03 inHg

6:00 AM

Partly cloudy night

53° 💧 None 💨 2 mph H 64%30.06 inHg

12:00 PM

Partly cloudy

49° 💧 None 💨 1 mph H 64%30.03 inHg

6:00 PM

Mostly sunny

71° 💧 None 💨 7 mph H 31%29.94 inHg

Sunday

12:00 AM

Partly cloudy night

69° 💧 None 💨 4 mph H 41%29.85 inHg

6:00 AM

Mostly clear night

48° 💧 None 💨 4 mph H 74%29.97 inHg

12:00 PM

Mostly cloudy

46° 💧 None 💨 3 mph H 76%30.03 inHg

6:00 PM

Sunny

60° 💧 None 💨 1 mph H 41%30.00 inHg

Monday

12:00 AM

Clear night

62° 💧 None 💨 4 mph H 41%29.91 inHg

6:00 AM

Partly cloudy night

45° 💧 None 💨 2 mph H 67%29.97 inHg

12:00 PM

Sunny

40° 💧 None 💨 1 mph H 69%29.94 inHg

6:00 PM

Mostly sunny

61° 💧 None 💨 3 mph H 40%29.88 inHg

Tuesday

12:00 AM

Partly cloudy night

63° 💧 None 💨 4 mph H 37%29.77 inHg

6:00 AM

Mostly cloudy night

47° 💧 None 💨 3 mph H 58%29.85 inHg

12:00 PM

Partly cloudy

41° 💧 None 💨 4 mph H 86%29.91 inHg

6:00 PM

Sunny

58° 💧 None 💨 7 mph H 25%29.97 inHg

Wednesday

12:00 AM

Clear night

58° 💧 None 💨 4 mph H 26%30.00 inHg

6:00 AM

Clear night

41° 💧 None 💨 1 mph H 52%30.09 inHg

12:00 PM

Sunny

37° 💧 None 💨 1 mph H 57%30.12 inHg

6:00 PM

Sunny

59° 💧 None 💨 5 mph H 25%30.06 inHg

Thursday

12:00 AM

Overcast night

61° 💧 None 💨 3 mph H 34%29.94 inHg

6:00 AM

Mostly cloudy night

47° 💧 None 💨 1 mph H 39%30.00 inHg

12:00 PM

Partly cloudy

43° 💧 None 💨 1 mph H 45%30.00 inHg

In Boulder and, more broadly, across the state of Montana: Clear skies are expected through the evening with temperatures holding steady around 57 degrees. Light southeast winds will prevail, blowing at no more than 5 mph, with occasional gusts reaching up to 11 mph. No precipitation is anticipated overnight, providing a dry and peaceful evening. Conditions will remain relatively cool, so it may be a good idea to have a light jacket if you plan to be outdoors. The weather will stay calm and clear into the early morning hours, making for a tranquil night ahead.

15-Day Weather Outlook for Boulder

TomorrowTomorrow

Partly cloudy 73°/42° 💧 None 💨 8 mph

Friday, Sep 18Fri Sep 18

Light thunderstorms 68°/44° 💧 None 💨 7 mph

Saturday, Sep 19Sat Sep 19

Moderate rain 51°/47° 💧 1.661 in 💨 6 mph

Sunday, Sep 20Sun Sep 20

Mostly sunny 65°/40° 💧 0.001 in 💨 3 mph

Monday, Sep 21Mon Sep 21

Partly cloudy 67°/43° 💧 0.000 in 💨 6 mph

Tuesday, Sep 22Tue Sep 22

Mostly sunny 66°/43° 💧 0.000 in 💨 3 mph

Wednesday, Sep 23Wed Sep 23

Partly cloudy 66°/43° 💧 0.007 in 💨 4 mph

Thursday, Sep 24Thu Sep 24

Mostly sunny 67°/44° 💧 0.001 in 💨 4 mph

Friday, Sep 25Fri Sep 25

Sunny 68°/47° 💧 None 💨 5 mph

Saturday, Sep 26Sat Sep 26

Partly cloudy 71°/49° 💧 None 💨 7 mph

Sunday, Sep 27Sun Sep 27

Partly cloudy 69°/46° 💧 0.012 in 💨 4 mph

Monday, Sep 28Mon Sep 28

Partly cloudy 62°/40° 💧 0.005 in 💨 4 mph

Tuesday, Sep 29Tue Sep 29

Partly cloudy 63°/41° 💧 0.026 in 💨 7 mph

Wednesday, Sep 30Wed Sep 30

Sunny 59°/37° 💧 None 💨 5 mph

Thursday, Oct 1Thu Oct 1

Overcast 61°/43° 💧 None 💨 3 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Boulder

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Boulder

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 10:00 PM

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 2,9µg/m³

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

O₃ Ozone Fair 66,1µg/m³

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

NO₂ Nitrogen dioxide Good 3,6µg/m³

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

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Boulder

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 5,0Moderate 🙂Fair

Tomorrow UV 5,3Moderate 🙂Fair

Friday UV 4,6Moderate 😊Good

Saturday UV 0,8Low 🙂Fair

Sunday UV 5,4Moderate 🙂Fair

Monday UV 6,0High —Unavailable

Tuesday UV 6,0High —Unavailable

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

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

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 Boulder

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · BOULDER, MONTANA

Tonight's Stargazing & Shooting Stars

Good observing conditions. Best local viewing window: 3:00 AM–4:00 AM.

72/100Best-hour score

BEST TIME TONIGHT 3:00 AM–4:00 AM Astronomical darkness: 9:20 PM–5:27 AM

☁ Cloud cover 37% Real hourly forecast for the best viewing hour.

☾ Moonlight 31% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 68° 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 min67%

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

Explore current conditions and forecasts for other locations.

Avondale US · Arizona · 92,477 residents Elmira US · New York · 26,257 residents Clunderwen GB · Wales · 685 residents Post Green GB · England · 210 residents Lahaina US · Hawaii · 10,162 residents Seaboard US · North Carolina · 585 residents Migratory - Offshore - Shipping (Tas.) AU · Tasmania · 19 residents Mesquite US · Texas · 149,299 residents Powell US · Tennessee · 13,739 residents Twentynine Palms US · California · 27,355 residents Taylors Lakes AU · Victoria · 15,174 residents Plain City US · Ohio · 3,829 residents Garrison US · Maryland · 9,469 residents Milton CA · Ontario · 132,979 residents Southgate GB · Wales · 1,935 residents Ramsden GB · England · 365 residents

Forecast data for Boulder were last refreshed today at 9:24 PM. The current forecast period extends through 18/09/2026 at 7:00 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.