Pasco, WA Weather Forecast
Franklin County, Washington
Seven-day outlook
34–54°F across the weekThe week runs between 34° and 54°, with today the warmest day of it. There is no real trend across it: one day looks much like the next. Saturday is the wettest day, peaking near 32%. 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 Pasco forecast
Pasco sits at 46.2661°N, 119.1214°W in Franklin 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
- Franklin County
- Coordinates
- 46.2661°N, 119.1214°W
- Population
- 80,038 · 2023 estimate
- Land area
- 38.963 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Pasco, 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 Pasco?
The nearest Doppler radar is KPDT (Pendleton, OR), 42 miles to the SSE. 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 Pasco its center is about 2,800 ft above ground. That is comfortably inside the useful range. The lowest scan passes low enough over Pasco to show rotation in the part of a storm where tornadoes actually form. Pasco is closer to its radar than 53% of US cities.
The closest instrument actually measuring the air is KPSC · Pasco/Tri Cities Arpt on the ASOS/AWOS network, 0.3 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 Pasco
- Kennewick, WA5 mi
- Richland, WA8 mi
- West Richland, WA13 mi
- Benton City, WA17 mi
- Umatilla, OR26 mi
- Connell, WA30 mi
- Hermiston, OR31 mi
- Prosser, WA31 mi
Elsewhere in Washington
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