Juneau, AK Weather Forecast
Juneau City and Borough, Alaska
Seven-day outlook
31–41°F across the weekThe week runs between 30° and 40°, with Wednesday 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 82%.
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 Juneau forecast
Juneau sits at 58.3729°N, 134.1784°W in Juneau City and Borough, Alaska. 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
- Juneau City and Borough
- Coordinates
- 58.3729°N, 134.1784°W
- Population
- 31,555 · 2023 estimate
- Land area
- 2,704.203 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Juneau, 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 Juneau?
The nearest Doppler radar is PACG (Sitka, AK), 116 miles to the SSW. 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 Juneau its center is about 12,100 ft above ground. At that range the beam overshoots the layer where severe weather organizes. The radar is describing the middle of the storm, not its base , which is why a warning for Juneau can look unsupported on the mosaic and still be right. Trust the warning over the picture.
The closest instrument actually measuring the air is PAJN · Juneau Intl on the ASOS/AWOS network, 14 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 Alaska observing network as of this build.
Forecasts near Juneau
- Sitka, AK93 mi
- Wrangell, AK171 mi
- Ketchikan, AK229 mi
Elsewhere in Alaska
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