Riverton, WY Weather Forecast
Fremont County, Wyoming
Seven-day outlook
31–58°F across the weekThe week runs between 32° and 58°, with Saturday the warmest day of it. The second half leans cooling, and Monday is the coolest day in it. Monday is the wettest day, peaking near 73%. 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 Riverton forecast
Riverton sits at 43.0263°N, 108.3813°W in Fremont County, Wyoming. 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
- Fremont County
- Coordinates
- 43.0263°N, 108.3813°W
- Population
- 10,923 · 2023 estimate
- Land area
- 10.34 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Riverton, 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 Riverton?
The nearest Doppler radar is KRIW (Riverton, WY), 5.6 miles to the WNW. 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 Riverton its center is about 270 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 Riverton, so low-level rotation and the leading edge of a gust front show up on it. Riverton is closer to its radar than 98% of US cities.
The closest instrument actually measuring the air is KRIW · Riverton Rgnl on the ASOS/AWOS network, 4.1 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 Wyoming observing network as of this build.
Forecasts near Riverton
- Lander, WY23 mi
- Thermopolis, WY44 mi
- Worland, WY72 mi
- Mills, WY101 mi
- Bar Nunn, WY103 mi
- Rawlins, WY104 mi
- Casper, WY105 mi
- Evansville, WY107 mi
Elsewhere in Wyoming
CheyenneCasperGilletteLaramieRock SpringsSheridanAll Wyoming forecasts →