Weather chart for Little Valley based on 22 years of data gathered at the Little Valley weather station (1993 m) by Hal Klieforth. Bars are mean monthly precipitation; the line is mean monthly temperature.
The climate of Little Valley, like that of the Sierra Nevada and most of California, is Mediterranean. The distinguishing features of a Mediterranean climate are warm, dry summers, usually beginning in late May and lasting through October, and cool, wet winters.
The summer is characterized by sunny weather punctuated with a few intense thunderstorms of short duration. Winters, on the other hand, are characterized by prevailing westerly airflow that brings moist cyclonic storms from mid-November through May. Mean annual precipitation at the weather station in Little Valley (1993 m) is 87.5 cm. In Little Valley, ≈50% of the average annual precipitation falls as snow. The heavy precipitation that falls on the higher elevations of the ridge west of Little Valley, and the spring runoff from that snowpack helps support the extensive pine and fir forests and the riparian areas of Little Valley.
Annual precipitation at Tahoe Meadows (≈6 km north-northwest of Little Valley at an elevation of 2600 m), similar to the highest elevation of the Whittell Forest. Precipitation years are calculated from 1 July to 30 June. 54.1 inches of average annual precipitation is equivalent to 135.3 cm.