Colusa, CA Weather Forecast
Colusa County, California
Seven-day outlook
45–67°F across the weekThe week runs between 45° and 67°, with today the warmest day of it. There is no real trend across it: one day looks much like the next. Every day in the outlook stays 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 Colusa forecast
Colusa sits at 39.2000°N, 122.0095°W in Colusa County, California. 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
- Colusa County
- Coordinates
- 39.2000°N, 122.0095°W
- Population
- 6,527 · 2023 estimate
- Land area
- 4.361 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Colusa, 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 Colusa?
The nearest Doppler radar is KBBX (Beale AFB, CA), 29 miles to the NE. 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 Colusa its center is about 1,700 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 Colusa, so low-level rotation and the leading edge of a gust front show up on it. Colusa is closer to its radar than 72% of US cities.
The closest instrument actually measuring the air is KMYV · Marysville/Yuba Cnty on the ASOS/AWOS network, 25 miles away. Far enough that "current conditions" for Colusa is an educated reading of somewhere else, worth knowing before you plan around a single temperature.
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 California observing network as of this build.
Forecasts near Colusa
- Williams, CA8 mi
- Live Oak, CA19 mi
- Gridley, CA20 mi
- Yuba City, CA20 mi
- Marysville, CA23 mi
- Willows, CA24 mi
- Oroville, CA32 mi
- Wheatland, CA35 mi
Elsewhere in California
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