Outdoor conditions in

Longmont

Colorado
Winter Weather AdvisoryWinter Weather Advisory issued October 15 at 3:12AM MDT until October 15 at 9:00AM MDT by NWS Denver COOfficial NWS alert
Now
  1. 43°Rain Showers Likely56% rain100% humidityGusts 21 mph
  2. 46°Rain Showers Likely68% rain86% humidityGusts 24 mph
  3. 49°Rain Showers Likely68% rain74% humidityGusts 28 mph
  4. 52°Rain Showers Likely68% rain63% humidityGusts 30 mph
  5. 53°Cloudy14% rain59% humidityGusts 30 mph
  6. 55°Mostly Cloudy14% rain53% humidityGusts 30 mph
  7. 56°Mostly Cloudy14% rain51% humidityGusts 28 mph
  8. 56°Partly Sunny2% rain49% humidityGusts 25 mph
  9. 56°Mostly Sunny2% rain47% humidityGusts 24 mph
  10. 54°Mostly Sunny2% rain48% humidityGusts 18 mph
  11. 52°Mostly Clear0% rain50% humidityGusts 9 mph
  12. 50°Clear0% rain54% humidityGusts 7 mph
  13. 45°Clear0% rain63% humidityGusts 6 mph
  14. 43°Clear0% rain67% humidityGusts 3 mph
  15. 41°Clear0% rain67% humidityGusts 3 mph
  16. 40°Clear0% rain67% humidityGusts 3 mph
  17. 38°Clear0% rain70% humidityGusts 6 mph
  18. 38°Clear0% rain67% humidityGusts 6 mph
  19. 35°Clear0% rain75% humidityGusts 3 mph
  20. 34°Clear0% rain75% humidityGusts 3 mph
  21. 31°Mostly Clear0% rain81% humidityGusts 2 mph
  22. 31°Mostly Clear0% rain81% humidityGusts 3 mph
  23. 30°Sunny0% rain88% humidityGusts 3 mph
  24. 29°Sunny0% rain92% humidityGusts 3 mph
Extra care for

A little farther out

The next five days

Today

Today has a real shower chance.

Rain
68%
Humidity
47–100%
Wind
30 mph
Fri

Friday looks fairly quiet.

Rain
0%
Humidity
29–92%
Wind
13 mph
Sat

Saturday looks fairly quiet.

Rain
0%
Humidity
21–75%
Wind
9 mph
Sun

Sunday looks fairly quiet.

Rain
0%
Humidity
21–62%
Wind
14 mph
Mon

Monday looks fairly quiet.

Rain
0%
Humidity
27–73%
Wind
10 mph
  1. 56° / 40°Today has a real shower chance.68% rain · Humidity 47–100% · Wind 30 mph
  2. 59° / 29°Friday looks fairly quiet.0% rain · Humidity 29–92% · Wind 13 mph
  3. 76° / 33°Saturday looks fairly quiet.0% rain · Humidity 21–75% · Wind 9 mph
  4. 74° / 41°Sunday looks fairly quiet.0% rain · Humidity 21–62% · Wind 14 mph
  5. 73° / 42°Monday looks fairly quiet.0% rain · Humidity 27–73% · Wind 10 mph

Environmental watch

Air quality + smoke

Air quality

Denver-Boulder area · Updated Thu 8:25 AM
42GoodUS AQI

No fresh outlook yet.

Sky check

No plume detected overhead

Satellite view · Updated Thu 6:45 AM

Air near ground42 · Good US AQI

Rain, in motion · Past four hours

Longmont radar

An active official alert is in effect. Its affected area is described above the briefing.

Ready when you areSee what is moving toward Longmont.

Watch the last four hours of rain, then search any nearby trail, lake, or address.

View the official forecast ↗

Outdoor fire check

Thinking about a backyard fire?

Use extra caution.

There is no lower-concern three-hour stretch in the next 12 hours.

Next 12 hoursChoose a time to see what is driving the concern.
Selected timeNowUse caution

Sustained wind is 13 mph. Gusts may reach 21 mph. Thunder is possible.

Humidity
100%
Wind
13 mph
Gusts
21 mph

Check local rules. Weather is only part of the decision. Check city, county, and land-manager fire restrictions before lighting any outdoor fire.

Nearby regional view

Explore Boulder

About 16 miles away, the Boulder hub looks more deeply at Boulder, CO. It reflects that wider area rather than Longmont’s exact conditions.

About these readingsSources and local limits

Weather

Forecasts, alerts, and radar come from NOAA and the National Weather Service.

Air quality

This reading describes Denver-Boulder area, about 19 miles away. Conditions can differ at this exact spot.

Smoke

Satellite imagery shows smoke overhead. It cannot tell us how much smoke has reached breathing level.

This page represents Longmont, CO, so conditions can vary from street to street. Environmental data: AirNow · participating air agencies · preliminary real-time US AQI · NOAA Hazard Mapping System · satellite-observed smoke.