Since Placer County extends from the Sacramento Valley floor up into the Sierras, the weather definitely varies and has a wide range.
However, Lincoln is the place to be if you like sunny days and mild winters. In the summer, July and August are the warmest months, with temperatures averaging around 95 degrees and often topping 100 degrees. Daytime highs in June and September average 89 degrees with nights dropping to an average of 57.
Spring and Fall daytime averages are in the 80s, perfect for most outdoor activities. The warm spring weather brings out beautiful wildflower colors, while the crisp cool nights of Fall and shorter days result in a splendid show of Fall Colors!
The coolest month is usually December, with an average high of 55 degrees, and low of 39 degrees. January, February and March are the rainiest months, each averaging nearly 4.5 inches per month.