Alta Sierra weather
Loading live data…The weather map: all three models at once
NWS, American, European side by side around Alta Sierra and nearby towns.Live rain radar →Next 14 hours
consensus of the three models7-day forecast
where the models agree, and where they splitAlta Sierra is a small town of about 6,911 people in CA, sitting at 39.1°N in a temperate climate zone. NWS, American, European each forecast Alta Sierra with their own physics, so we line all three up and flag where they disagree. Nearby towns include Grass Valley, North Auburn, Auburn.
Which forecast is most accurate in the US?
CheckWeather Score — graded against the weather that actually happened
The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 40 cities. Lower error means a higher score. The apps you know (AccuWeather, Apple Weather, The Weather Channel) are built on these models.
Common questions
What's the weather in Alta Sierra today?
Will it rain in Alta Sierra today or tomorrow?
Which forecast is most accurate for Alta Sierra?
The forecasts Americans check
The two biggest apps keep their model a secret, so we can't show their numbers, only link you to them. The National Weather Service is public, so its data sits right in the comparison above.