While today is expected to be a bit warm for early October with highs in the mid-to-upper 80s, the National Weather Service predicts the weekend will be unseasonably hot with temperatures in the 90s.
A strong high pressure ridge over the west coast will produce fair skies and well-above normal temperatures in Northern California, according to the NWS. Daytime highs over the weekend are predicted to run about 10 degrees above normal for early fall.
Courtesy of the weather service here are comparisons for Saturday:
Sacramento: Normal, 83, forecast high, 94.
Woodland: Normal, 85, forecast high, 94.
Roseville: Normal, 83, forecast high, 92.
Auburn: Normal, 80, forecast high, 87.
Placerville: Normal, 80, forecast high, 86.
San Francisco: Normal, 71, forecast high, 86.
The detailed, 7-day forecast from the NWS for the Sacramento region: