Winter-time at Muir Woods is filled with rainy days. On average the park receives up to 40 inches of rain during the winter months. Although the Summer months are dry, the forest is layered in fog, which keeps the park cool and moist year round. Daytime temperatures at Muir Woods average between 40 and 70 degrees Farenheit.

To check the weather forecast for Muir Woods a day or two before your visit, click on the link to the National Weather Service web page for Mill Valley, the nearest town to Muir Woods. To check the tide chart for the San Francisco Bay, click on the link to the NOAA website for Golden Gate.