Longview, WA Weather Forecast
Cowlitz County, Washington
Seven-day outlook
38–59°F across the weekThe week runs between 38° and 58°, with Wednesday the warmest day of it. There is no real trend across it: one day looks much like the next. Today is the wettest day, peaking near 46%. 5 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 Longview forecast
Longview sits at 46.1457°N, 122.9643°W in Cowlitz County, Washington. 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
- Cowlitz County
- Coordinates
- 46.1457°N, 122.9643°W
- Population
- 37,925 · 2023 estimate
- Land area
- 14.798 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Longview, 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 Longview?
The nearest Doppler radar is KRTX (Portland, OR), 30 miles to the S. 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 Longview its center is about 1,800 ft above ground. That is about as close as radar coverage gets in the United States: the lowest scan is still near the ground when it reaches Longview, so low-level rotation and the leading edge of a gust front show up on it. Longview is closer to its radar than 71% of US cities.
The closest instrument actually measuring the air is KKLS · Kelso/Longview Arpt on the ASOS/AWOS network, 3.7 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 Washington observing network as of this build.
Forecasts near Longview
- Kelso, WA4 mi
- Kalama, WA11 mi
- Woodland, WA19 mi
- St. Helens, OR21 mi
- La Center, WA24 mi
- Ridgefield, WA26 mi
- Scappoose, OR27 mi
- Battle Ground, WA33 mi
Elsewhere in Washington
SeattleSpokaneTacomaVancouverBellevueKentAll Washington forecasts →