Charter Oak, CA is at its warmest in Jul (average highs near 94°F) and coldest in Feb (lows around 43°F), with roughly 44 in of precipitation across the year. Below, compare what NWS, American, European forecast for Charter Oak right now, and see exactly where they disagree.
We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.
The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.