Lafayette, CO Weather Forecast
Boulder County, Colorado
Seven-day outlook
Forecasts come from the National Weather Service's own computer models, and current conditions from the nearest reporting weather station. Both are served through the weather API. A forecast is guidance, not a warning, and anything the Weather Service has actually issued is on the live map.
The written summaries on this page are generated from the forecast data above, not by a meteorologist. Each sentence is a reading of the same numbers you can see, and no forecaster has reviewed them.
About the Lafayette forecast
Lafayette sits at 39.9948°N, 105.0997°W in Boulder County, Colorado. The forecast above is drawn for that point from the National Weather Service's own computer models: a seven-day outlook, and a finer-grained one covering the next eighteen hours where it reaches, and the radar and alert panels show what the Weather Service has out over the area right now.
- County
- Boulder County
- Coordinates
- 39.9948°N, 105.0997°W
- Population
- 30,439 · 2023 estimate
- Land area
- 9.231 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Lafayette, and the forecast is for that location, not for every address inside the city limits, and a large city can have real weather differences from one side to the other.
How well can the network see Lafayette?
The nearest Doppler radar is KFTG (Denver, CO), 33 miles to the ESE. A WSR-88D's lowest routine scan sits half a degree above horizontal, and the earth curves away beneath it, so by the time that beam reaches Lafayette its center is about 2,000 ft above ground. That is comfortably inside the useful range. The lowest scan passes low enough over Lafayette to show rotation in the part of a storm where tornadoes actually form. Lafayette is closer to its radar than 67% of US cities.
The closest instrument actually measuring the air is KEIK · Erie Muni on the ASOS/AWOS network, 2.9 miles away. Close enough that its readings are, for practical purposes, the conditions in town.
Beam height is the standard 4/3-earth approximation for the 0.5° scan and assumes normal refraction; it is where the center of the beam is, not its edges, and unusual temperature profiles bend it. Radar siting from the NWS WSR-88D network, station positions from the Colorado observing network as of this build.
Forecasts near Lafayette
- Louisville, CO3 mi
- Broomfield, CO4 mi
- Erie, CO5 mi
- Superior, CO5 mi
- Westminster, CO8 mi
- Boulder, CO8 mi
- Northglenn, CO8 mi
- Dacono, CO9 mi
Elsewhere in Colorado
DenverColorado SpringsAuroraFort CollinsLakewoodThorntonAll Colorado forecasts →