What is the weather in Longmont right now?

Current weather in Longmont is overcast clouds.

Where can I find the hourly weather forecast for Longmont?

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

Is the weather forecast for Longmont updated regularly?

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

Now · 12:58 PM

Longmont Weather & Hourly Forecast

United States · Colorado · 80501

72°F

Overcast

Feels like: 70°F

💧 Humidity 43% 🌡 Pressure 30.00 inHg 💨 Wind 2 mph 👁 Visibility 35.6 mi ☁ Clouds 100% ☀️ UV index 4.4 · Moderate 🌅 Sunrise 6:47 AM 🌇 Sunset 6:57 PM

Hourly Forecast for Longmont

Today

1:00 PM

Overcast

73° 💧 0.004 in 💨 3 mph H 42%29.97 inHg

4:00 PM

Overcast

76° 💧 None 💨 5 mph H 35%29.94 inHg

7:00 PM

Overcast night

70° 💧 None 💨 3 mph H 47%29.97 inHg

10:00 PM

Overcast night

62° 💧 None 💨 3 mph H 68%30.03 inHg

Tomorrow

1:00 AM

Overcast night

58° 💧 None 💨 2 mph H 80%30.06 inHg

4:00 AM

Mostly cloudy night

57° 💧 None 💨 3 mph H 76%30.09 inHg

7:00 AM

Overcast

57° 💧 None 💨 3 mph H 69%30.12 inHg

10:00 AM

Mostly cloudy

68° 💧 None 💨 1 mph H 42%30.12 inHg

1:00 PM

Overcast

75° 💧 None 💨 5 mph H 31%30.06 inHg

4:00 PM

Mostly cloudy

74° 💧 None 💨 7 mph H 32%30.00 inHg

7:00 PM

Mostly cloudy night

71° 💧 None 💨 4 mph H 40%30.03 inHg

10:00 PM

Mostly clear night

67° 💧 None 💨 3 mph H 54%30.09 inHg

Friday

1:00 AM

Mostly clear night

60° 💧 None 💨 3 mph H 75%30.06 inHg

4:00 AM

Mostly clear night

57° 💧 None 💨 2 mph H 85%30.06 inHg

7:00 AM

Mostly sunny

55° 💧 None 💨 2 mph H 90%30.09 inHg

10:00 AM

Sunny

65° 💧 0.002 in 💨 3 mph H 66%30.03 inHg

Today

1:00 PM

Overcast

73° 💧 None 💨 3 mph H 42%29.97 inHg

2:00 PM

Strong thunderstorm

75° 💧 None 💨 4 mph H 40%29.97 inHg

3:00 PM

Light thunderstorms

76° 💧 0.004 in 💨 4 mph H 36%29.94 inHg

4:00 PM

Overcast

76° 💧 None 💨 5 mph H 35%29.94 inHg

5:00 PM

Overcast

75° 💧 None 💨 5 mph H 35%29.94 inHg

6:00 PM

Overcast

73° 💧 None 💨 4 mph H 39%29.97 inHg

7:00 PM

Overcast night

70° 💧 None 💨 3 mph H 47%29.97 inHg

8:00 PM

Overcast night

67° 💧 None 💨 2 mph H 53%30.00 inHg

9:00 PM

Overcast night

65° 💧 None 💨 2 mph H 59%30.03 inHg

10:00 PM

Overcast night

62° 💧 None 💨 3 mph H 68%30.03 inHg

11:00 PM

Overcast night

61° 💧 None 💨 2 mph H 75%30.03 inHg

Tomorrow

12:00 AM

Mostly cloudy night

59° 💧 None 💨 2 mph H 79%30.06 inHg

1:00 AM

Overcast night

58° 💧 None 💨 2 mph H 80%30.06 inHg

2:00 AM

Overcast night

58° 💧 None 💨 3 mph H 78%30.06 inHg

3:00 AM

Overcast night

58° 💧 None 💨 3 mph H 78%30.06 inHg

4:00 AM

Mostly cloudy night

57° 💧 None 💨 3 mph H 76%30.09 inHg

5:00 AM

Overcast night

56° 💧 None 💨 3 mph H 75%30.09 inHg

6:00 AM

Overcast night

56° 💧 None 💨 4 mph H 71%30.09 inHg

7:00 AM

Overcast

57° 💧 None 💨 3 mph H 69%30.12 inHg

8:00 AM

Overcast

60° 💧 None 💨 2 mph H 65%30.12 inHg

9:00 AM

Overcast

64° 💧 None 💨 1 mph H 53%30.15 inHg

10:00 AM

Mostly cloudy

68° 💧 None 💨 1 mph H 42%30.12 inHg

11:00 AM

Mostly cloudy

72° 💧 None 💨 5 mph H 34%30.12 inHg

12:00 PM

Mostly cloudy

74° 💧 None 💨 5 mph H 32%30.09 inHg

1:00 PM

Overcast

75° 💧 None 💨 5 mph H 31%30.06 inHg

2:00 PM

Overcast

77° 💧 None 💨 5 mph H 30%30.03 inHg

3:00 PM

Overcast

76° 💧 None 💨 6 mph H 30%30.00 inHg

4:00 PM

Mostly cloudy

74° 💧 None 💨 7 mph H 32%30.00 inHg

5:00 PM

Mostly cloudy

75° 💧 None 💨 6 mph H 32%30.00 inHg

6:00 PM

Overcast

73° 💧 None 💨 6 mph H 34%30.03 inHg

7:00 PM

Mostly cloudy night

71° 💧 None 💨 4 mph H 40%30.03 inHg

8:00 PM

Overcast night

70° 💧 None 💨 5 mph H 41%30.03 inHg

9:00 PM

Mostly cloudy night

68° 💧 None 💨 7 mph H 47%30.09 inHg

10:00 PM

Mostly clear night

67° 💧 None 💨 3 mph H 54%30.09 inHg

11:00 PM

Mostly clear night

63° 💧 None 💨 0 mph H 65%30.09 inHg

Friday

12:00 AM

Partly cloudy night

62° 💧 None 💨 1 mph H 68%30.09 inHg

1:00 AM

Mostly clear night

60° 💧 None 💨 3 mph H 75%30.06 inHg

2:00 AM

Mostly clear night

59° 💧 None 💨 3 mph H 81%30.06 inHg

3:00 AM

Mostly clear night

58° 💧 None 💨 2 mph H 84%30.06 inHg

4:00 AM

Mostly clear night

57° 💧 None 💨 2 mph H 85%30.06 inHg

5:00 AM

Clear night

56° 💧 None 💨 3 mph H 88%30.06 inHg

6:00 AM

Clear night

55° 💧 None 💨 3 mph H 90%30.06 inHg

7:00 AM

Mostly sunny

55° 💧 None 💨 2 mph H 90%30.09 inHg

8:00 AM

Partly cloudy

58° 💧 None 💨 3 mph H 81%30.09 inHg

9:00 AM

Sunny

61° 💧 None 💨 3 mph H 74%30.06 inHg

10:00 AM

Sunny

65° 💧 None 💨 3 mph H 66%30.03 inHg

11:00 AM

Sunny

69° 💧 0.001 in 💨 5 mph H 57%30.00 inHg

12:00 PM

Mostly sunny

72° 💧 0.002 in 💨 5 mph H 48%29.94 inHg

1:00 PM

Partly cloudy

74° 💧 0.003 in 💨 3 mph H 44%29.91 inHg

2:00 PM

Light thunderstorms

73° 💧 0.010 in 💨 2 mph H 45%29.88 inHg

3:00 PM

Light thunderstorms

68° 💧 0.034 in 💨 7 mph H 61%29.88 inHg

4:00 PM

Light rain

70° 💧 0.005 in 💨 5 mph H 53%29.85 inHg

5:00 PM

Light rain

71° 💧 0.005 in 💨 3 mph H 51%29.85 inHg

6:00 PM

Mostly sunny

70° 💧 None 💨 3 mph H 52%29.85 inHg

Saturday

3:00 AM

Clear night

52° 💧 None 💨 2 mph H 90%29.88 inHg

6:00 AM

Mostly clear night

49° 💧 None 💨 3 mph H 92%29.91 inHg

9:00 AM

Sunny

60° 💧 None 💨 2 mph H 64%29.94 inHg

12:00 PM

Mostly sunny

81° 💧 None 💨 3 mph H 20%29.85 inHg

3:00 PM

Mostly sunny

83° 💧 None 💨 3 mph H 15%29.83 inHg

6:00 PM

Sunny

79° 💧 None 💨 2 mph H 24%29.83 inHg

9:00 PM

Mostly clear night

69° 💧 None 💨 1 mph H 33%29.88 inHg

Sunday

12:00 AM

Clear night

60° 💧 None 💨 2 mph H 55%29.94 inHg

3:00 AM

Clear night

56° 💧 None 💨 2 mph H 69%29.97 inHg

6:00 AM

Partly cloudy night

52° 💧 None 💨 1 mph H 76%30.00 inHg

9:00 AM

Partly cloudy

63° 💧 None 💨 1 mph H 48%30.00 inHg

12:00 PM

Partly cloudy

78° 💧 None 💨 3 mph H 26%29.91 inHg

3:00 PM

Mostly cloudy

85° 💧 None 💨 7 mph H 17%29.80 inHg

6:00 PM

Mostly cloudy

81° 💧 None 💨 0 mph H 31%29.74 inHg

9:00 PM

Overcast night

71° 💧 None 💨 8 mph H 34%29.80 inHg

Monday

12:00 AM

Mostly cloudy night

66° 💧 None 💨 2 mph H 47%29.80 inHg

3:00 AM

Overcast night

62° 💧 None 💨 7 mph H 55%29.83 inHg

6:00 AM

Mostly cloudy night

61° 💧 None 💨 9 mph H 63%29.85 inHg

9:00 AM

Mostly cloudy

63° 💧 None 💨 0 mph H 59%29.83 inHg

12:00 PM

Mostly sunny

74° 💧 None 💨 2 mph H 36%29.77 inHg

3:00 PM

Partly cloudy

75° 💧 None 💨 5 mph H 33%29.71 inHg

6:00 PM

Light rain

64° 💧 None 💨 5 mph H 74%29.77 inHg

9:00 PM

Light rain

57° 💧 None 💨 8 mph H 90%29.88 inHg

Tuesday

12:00 AM

Light rain

57° 💧 None 💨 5 mph H 93%29.88 inHg

6:00 AM

Light rain

55° 💧 None 💨 9 mph H 91%29.91 inHg

12:00 PM

Light rain

51° 💧 None 💨 6 mph H 72%30.03 inHg

6:00 PM

Mostly sunny

58° 💧 None 💨 2 mph H 42%30.06 inHg

Wednesday

12:00 AM

Clear night

61° 💧 None 💨 4 mph H 40%29.94 inHg

6:00 AM

Clear night

50° 💧 None 💨 3 mph H 85%29.97 inHg

12:00 PM

Sunny

45° 💧 None 💨 0 mph H 87%29.94 inHg

6:00 PM

Mostly sunny

70° 💧 None 💨 3 mph H 34%29.80 inHg

Thursday

12:00 AM

Clear night

72° 💧 None 💨 2 mph H 34%29.71 inHg

6:00 AM

Partly cloudy night

59° 💧 None 💨 10 mph H 36%29.94 inHg

12:00 PM

Sunny

47° 💧 None 💨 2 mph H 74%30.21 inHg

6:00 PM

Sunny

60° 💧 None 💨 5 mph H 31%30.18 inHg

Friday

12:00 AM

Clear night

63° 💧 None 💨 5 mph H 35%30.09 inHg

6:00 AM

Clear night

50° 💧 None 💨 1 mph H 78%30.12 inHg

12:00 PM

Sunny

44° 💧 None 💨 2 mph H 88%30.09 inHg

6:00 PM

Mostly cloudy

63° 💧 None 💨 2 mph H 45%29.97 inHg

Saturday

12:00 AM

Mostly cloudy night

71° 💧 None 💨 1 mph H 42%29.80 inHg

6:00 AM

Overcast night

59° 💧 None 💨 8 mph H 58%29.88 inHg

12:00 PM

Sunny

50° 💧 None 💨 0 mph H 78%29.97 inHg

6:00 PM

Mostly sunny

73° 💧 None 💨 2 mph H 26%29.97 inHg

Sunday

12:00 AM

Clear night

73° 💧 None 💨 2 mph H 28%29.91 inHg

6:00 AM

Mostly clear night

56° 💧 None 💨 1 mph H 59%30.06 inHg

12:00 PM

Mostly sunny

46° 💧 None 💨 2 mph H 83%30.09 inHg

6:00 PM

Mostly cloudy

76° 💧 None 💨 3 mph H 21%30.00 inHg

Monday

12:00 AM

Clear night

76° 💧 None 💨 3 mph H 22%29.91 inHg

6:00 AM

Clear night

55° 💧 None 💨 2 mph H 63%30.00 inHg

12:00 PM

Sunny

47° 💧 None 💨 2 mph H 83%30.00 inHg

6:00 PM

Sunny

80° 💧 None 💨 4 mph H 19%29.94 inHg

Tuesday

12:00 AM

Clear night

80° 💧 None 💨 3 mph H 17%29.88 inHg

6:00 AM

Clear night

65° 💧 None 💨 11 mph H 29%30.12 inHg

12:00 PM

Sunny

55° 💧 None 💨 2 mph H 58%30.24 inHg

6:00 PM

Sunny

70° 💧 None 💨 5 mph H 33%30.21 inHg

Wednesday

12:00 AM

Clear night

72° 💧 None 💨 5 mph H 35%30.12 inHg

6:00 AM

Clear night

57° 💧 None 💨 4 mph H 54%30.30 inHg

12:00 PM

Sunny

50° 💧 None 💨 4 mph H 68%30.30 inHg

6:00 PM

Sunny

66° 💧 None 💨 2 mph H 39%30.18 inHg

Thursday

12:00 AM

Clear night

72° 💧 None 💨 3 mph H 33%30.00 inHg

In Longmont and, more broadly, across the state of Colorado: Clear skies will persist through the evening, with temperatures remaining cool, around 60 degrees Fahrenheit. Winds will be light, coming from the northwest at up to 2 mph, with occasional gusts reaching 6 mph. No precipitation is expected tonight, providing a calm and dry night ahead. Temperatures are likely to stay steady, making for a comfortable evening. Be sure to dress appropriately for the cooler conditions if heading outside. The light breeze will add a slight chill, but overall, conditions will be stable and clear into the early morning hours.

15-Day Weather Outlook for Longmont

TomorrowTomorrow

Mostly cloudy 77°/56° 💧 None 💨 7 mph

Friday, Sep 25Fri Sep 25

Light thunderstorms 74°/55° 💧 None 💨 7 mph

Saturday, Sep 26Sat Sep 26

Mostly sunny 83°/49° 💧 0.108 in 💨 3 mph

Sunday, Sep 27Sun Sep 27

Mostly cloudy 85°/52° 💧 None 💨 8 mph

Monday, Sep 28Mon Sep 28

Light rain 75°/57° 💧 0.131 in 💨 9 mph

Tuesday, Sep 29Tue Sep 29

Light rain 58°/51° 💧 0.137 in 💨 9 mph

Wednesday, Sep 30Wed Sep 30

Mostly sunny 70°/45° 💧 0.001 in 💨 4 mph

Thursday, Oct 1Thu Oct 1

Partly cloudy 72°/47° 💧 None 💨 10 mph

Friday, Oct 2Fri Oct 2

Mostly cloudy 63°/44° 💧 None 💨 5 mph

Saturday, Oct 3Sat Oct 3

Overcast 73°/50° 💧 0.007 in 💨 8 mph

Sunday, Oct 4Sun Oct 4

Mostly sunny 76°/46° 💧 0.001 in 💨 3 mph

Monday, Oct 5Mon Oct 5

Sunny 80°/47° 💧 None 💨 4 mph

Tuesday, Oct 6Tue Oct 6

Sunny 80°/55° 💧 None 💨 11 mph

Wednesday, Oct 7Wed Oct 7

Sunny 72°/50° 💧 None 💨 5 mph

Thursday, Oct 8Thu Oct 8

Sunny 72°/72° 💧 None 💨 3 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Longmont

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Longmont

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 1:00 PM

PM2.5 Fine particles Good 0,6µg/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 0,7µg/m³

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

O₃ Ozone Good 53,1µg/m³

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

NO₂ Nitrogen dioxide Good 0,9µg/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 Longmont

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 6,4High 🙂Fair

Friday UV 5,7Moderate 😊Good

Saturday UV 6,4High 🙂Fair

Sunday UV 8,0Very high 🙂Fair

Monday UV 7,0High —Unavailable

Tuesday UV 6,0High —Unavailable

Hourly UV index today

1:00 PMUV 4,7 2:00 PMUV 5,6 3:00 PMUV 4,3 4:00 PMUV 2,5 5:00 PMUV 0,9 6:00 PMUV 0,1 7:00 PMUV 0,0

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 Longmont

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · LONGMONT, COLORADO

Tonight's Stargazing & Shooting Stars

Local night-sky conditions and meteor activity for Jasper.

34/100Best-hour score

No good viewing window tonight Astronomical darkness exists, but current sky conditions are unfavorable.

☁ Cloud cover 88% Real hourly forecast for the best viewing hour.

☾ Moonlight 95% Waxing Gibbous · Moon about 6° above the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 65° high at the best hour.

✦ Estimated visible meteors Poor visibility Meteor activity may occur above the clouds, but local viewing conditions are not suitable.

Chance ≥1 meteor in 30 minNot meaningful

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 Longmont were last refreshed today at 12:08 PM. The current forecast period extends through 25/09/2026 at 10:00 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.