Lilburn, GA Weather Forecast
Gwinnett County, Georgia
Seven-day outlook
47–78°F across the weekThe week runs between 53° and 78°, with tomorrow the warmest day of it. There is no real trend across it: one day looks much like the next. Sunday is the wettest day, peaking near 42%. 4 of the 7 days stay dry.
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 Lilburn forecast
Lilburn sits at 33.8906°N, 84.1369°W in Gwinnett County, Georgia. 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
- Gwinnett County
- Coordinates
- 33.8906°N, 84.1369°W
- Population
- 15,862 · 2023 estimate
- Land area
- 6.748 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Lilburn, 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 Lilburn?
The nearest Doppler radar is KFFC (Atlanta, GA), 44 miles to the SW. 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 Lilburn its center is about 3,000 ft above ground. That is comfortably inside the useful range. The lowest scan passes low enough over Lilburn to show rotation in the part of a storm where tornadoes actually form. Lilburn is closer to its radar than 50% of US cities.
The closest instrument actually measuring the air is KPDK · Atlanta/Dekalb-Peachtree Arpt on the ASOS/AWOS network, 9.3 miles away. Near enough to be representative on most days, though a summer thunderstorm can soak one and miss the other entirely.
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 Georgia observing network as of this build.
Forecasts near Lilburn
- Tucker, GA5 mi
- Norcross, GA5 mi
- Stone Mountain, GA6 mi
- Peachtree Corners, GA8 mi
- Duluth, GA8 mi
- Doraville, GA8 mi
- Snellville, GA8 mi
- Clarkston, GA8 mi
Elsewhere in Georgia
AtlantaColumbusAugustaMacon-Bibb CountySavannahAthensAll Georgia forecasts →