Boulder, CO Lightning Map
Real-time lightning tracking for Boulder, Colorado. This city averages 42 thunderstorm days per year, making lightning awareness important for Boulder residents and visitors.
Live data from NOAA GOES-19 GLM. Boulder, CO. — quiet period. Boulder, CO averages 42 thunderstorm days per year.
Data sourced from NOAA GOES-19 GLM and the Storm Prediction Center.
Real-Time Lightning Near Boulder
Monitor live lightning strikes and approaching storms
Live Lightning Data for Boulder
Download the iOS app for live alerts, then use this city page plus the nearby-lightning and alert guides to make faster weather and safety calls in Boulder.
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Thunderstorm Season in Boulder
When to expect lightning activity in Boulder, CO
Boulder sees most of its thunderstorm activity between May and August, with June and July being the peak months. Storms are typically driven by frontal systems and can develop rapidly during warm, humid afternoons. The transition months of May and September can also bring significant lightning.
Compared to the national average of approximately 25 thunderstorm days per year, Boulder sees 17 more days of thunderstorm activity. The Colorado statewide average is 45 days.
Lightning Safety Tips for Boulder
Essential guidelines to stay safe during thunderstorms
30-30 Rule
When you see lightning, count to 30. If you hear thunder before reaching 30, get indoors. Wait 30 minutes after the last thunderclap before going outside.
Seek Shelter
With 42 thunderstorm days annually, residents of Boulder should always have a shelter plan. Move inside a substantial building or hard-topped vehicle.
Stay Informed
Use Lightning Tracker to monitor real-time lightning near Boulder. Set alerts for your neighborhood to get advance warning of approaching storms.
Avoid Open Areas
Stay away from open fields, hilltops, isolated trees, and bodies of water during storms. If hiking, descend from ridges and peaks immediately.
Useful Guides for Boulder
These guides match the nearby-lightning and alert questions people ask most often
Use this guide to judge nearby strike danger fast, especially when storms are building near your neighborhood.
Alerts Best alert options for Boulder stormsSee how app alerts, NOAA weather radio, and local warnings work when storms move toward your city.
Map guide How to read live lightning around BoulderUnderstand strike clusters, motion, and timing so you can decide when to get indoors.
Boulder Lightning FAQ
Fast answers for live lightning, storm season, and safety in Boulder
How many thunderstorm days does Boulder, Colorado get per year?
Boulder averages 42 thunderstorm days per year. The national average is approximately 25 days, and the Colorado statewide average is 45 days.
When is thunderstorm season in Boulder?
Boulder sees most of its thunderstorm activity between May and August, with June and July being the peak months. Storms are typically driven by frontal systems and can develop rapidly during warm, humid afternoons. The transition months of May and September can also bring significant lightning.
What should I do if caught in a lightning storm in Boulder?
Follow the 30-30 rule: if the time between seeing lightning and hearing thunder is 30 seconds or less, seek shelter immediately. With 42 thunderstorm days annually in Boulder, always have a shelter plan. Move inside a substantial building or hard-topped vehicle, and wait 30 minutes after the last thunderclap before going outside.
Nearest Lightning Maps to Boulder
Jump to nearby city pages when storms are moving across the region