Is it raining now in Longmont?
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9 JulNo upcoming precipitation for the next hour.
Last update: 20:00, 9 Jul 2026
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Rain in Longmont: What You Need to Know
Longmont, Colorado experiences Front Range afternoon convection and spring snowstorms. The Longmont rain radar provides real-time precipitation data at up to 250-meter resolution, updated every 4–6 minutes from KFTG (Denver/Front Range) — giving residents, commuters, and outdoor workers the advance notice they need before conditions change. A hyperlocal radar shows the actual cell position over Longmont; a forecast shows a probability across the broader Colorado region.
Storms in Longmont's part of Colorado typically approach from west over mountains. RainViewer's live map includes direction arrows that track exactly where an incoming cell is heading, so you can see whether rain will reach your neighborhood in Longmont or pass to the north or south. The 2-hour nowcast adds a forward-looking view beyond what the current radar frame shows.
Rain by Season in Longmont
Peak rain season (April–May (snow) and June–August (afternoon convection))
Longmont's most active weather aligns with April–May (snow) and June–August (afternoon convection), when Front Range afternoon convection and spring snowstorms drives the primary precipitation risk across this part of Colorado. Outdoor plans, commutes, and local events in Longmont face the highest weather disruption probability during this window.
Transition months
Seasonal transitions bring variable and less predictable conditions to Longmont. A live radar is more reliable than a multi-day forecast during these windows when storm tracks and intensities shift rapidly.
Drier season (October–March)
Precipitation probability drops in Longmont during October–March. Outdoor activities proceed with lower weather risk, though no season is entirely rain-free in Colorado.
Why You Need a Rain Radar in Longmont
Commuters and Drivers in Longmont
A live radar check before departure gives Longmont commuters 20+ minutes to adjust timing, avoid flood-prone road segments, or wait out a fast-moving cell. Rain events in Colorado can create hazardous conditions quickly, and a real-time map is more actionable than a forecast probability.
Outdoor Workers and Event Organizers in Longmont
Construction, outdoor events, and recreational activities in Longmont benefit from knowing exactly when rain will arrive from west over mountains. A 20–30 minute radar warning gives teams time to shelter equipment, complete outdoor tasks, or alert attendees before conditions deteriorate.
Residents and Visitors Planning Around Rain in Longmont
Whether planning a morning run, an outdoor dinner, or a day trip from Longmont, a live radar check replaces the uncertainty of a forecast with a real decision window. See whether the approaching cell will clear before your plans begin or whether rescheduling makes more sense.
RainViewer Radar Coverage in Longmont
RainViewer aggregates radar data for the United States from the NEXRAD network operated by NOAA's National Weather Service — 160 WSR-88D stations covering the contiguous US, Alaska, Hawaii, and US territories. Data updates every 4–6 minutes as each station completes its scan cycle. RainViewer processes and displays NEXRAD data at up to 250-meter resolution, preserving the raw scan data rather than smoothing it into regional averages. For Longmont, Colorado, the primary NEXRAD source is KFTG (Denver/Front Range), providing hyperlocal radar coverage across the area.
Longmont Rain Radar: Frequently Asked Questions
- Does Longmont flood when it rains heavily?
Longmont, like most Colorado communities, can experience localized flooding during intense rain events — particularly in low-lying areas near drainage channels, road underpasses, and stream corridors. Front range afternoon convection and spring snowstorms means runoff can accumulate quickly. A live radar gives advance warning to avoid flood-prone areas.
- When is the rainy season in Longmont?
Longmont's primary rain season runs through April–May (snow) and June–August (afternoon convection), driven by Front Range afternoon convection and spring snowstorms. The driest period is typically October–March, when precipitation probability is lowest and outdoor activities carry less weather risk.
- Is there a live rain radar for Longmont?
Yes — RainViewer displays live NEXRAD data for Longmont at up to 250-meter resolution, updated every 4–6 minutes from KFTG (Denver/Front Range). The map shows current precipitation, storm direction, and a 2-hour nowcast so you can track whether incoming cells will reach Longmont or pass nearby.
- Can I set a rain alert for Longmont?
RainViewer Essential sends a rain alert 10–15 minutes before precipitation reaches your saved location in Longmont, Colorado. The alert fires when radar confirms rain approaching your specific pin — more precise than a general area warning.
Track Rain in Longmont in Real Time
Rain in Longmont moves fast — a live radar gives you the advance window a forecast probability cannot.
Forecasts cover Colorado broadly. RainViewer shows the exact cell position over Longmont, updated every 4–6 minutes from KFTG (Denver/Front Range).
Your weather app shows rain likely near Longmont. RainViewer shows the cell is west of Longmont and arriving in minutes.
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storms approach Longmont from west over mountains
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