Editing Mill Valley, California (section)

===Climate===
[[File:Mill Valley CA Depot.jpg|thumb|right|250px|Old Railroad Depot]]
Mill Valley has a mild [[Mediterranean climate]] which results in relatively wet winters and very dry summers. Winter lows rarely drop below freezing and summer highs rarely peak {{convert|90|°F}} with 90% of the annual rain falling in November through March. Wind speeds average lower than national averages in winter months and higher in summer, and often become quite gusty in the canyon regions of town. [[Fog|California coastal fog]] often affects Mill Valley, making relative humidity highly variable. The wetter winter months tend to make for a more consistent daily relative humidity around 70–90% (slightly higher than US averages). During the summer months, however, while the morning fog often keeps morning humidity normal, in a typical 70–80% range, by afternoon after the fog burns off, the humidity regularly plummets to around 30% as one would expect in this dry seasonal climate.<ref>{{cite web|url=http://www.city-data.com/city/Mill-Valley-California.html |title=Mill Valley, California (CA 94941) profile: population, maps, real estate, averages, homes, statistics, relocation, travel, jobs, hospitals, schools, crime, moving, houses, news, sex offenders |website=City-data.com |date=October 13, 2008 |access-date=February 27, 2017}}</ref> 
{{Weather box
|location = Mill Valley, California
|single line = Y
|Jan record high F = 79
|Feb record high F = 79
|Mar record high F = 87
|Apr record high F = 96
|May record high F = 102
|Jun record high F = 110
|Jul record high F = 111
|Aug record high F = 106
|Sep record high F = 106
|Oct record high F = 101
|Nov record high F = 87
|Dec record high F = 77
|year record high F = 111
|Jan high F = 56
|Feb high F = 61
|Mar high F = 65
|Apr high F = 71
|May high F = 76
|Jun high F = 82
|Jul high F = 85
|Aug high F = 84
|Sep high F = 82
|Oct high F = 75
|Nov high F = 63
|Dec high F = 56
|year high F = 71
|Jan low F = 41
|Feb low F = 43
|Mar low F = 44
|Apr low F = 46
|May low F = 49
|Jun low F = 52
|Jul low F = 53
|Aug low F = 54
|Sep low F = 53
|Oct low F = 50
|Nov low F = 45
|Dec low F = 41
|year low F = 48
|Jan record low F = 20
|Feb record low F = 21
|Mar record low F = 27
|Apr record low F = 31
|May record low F = 23
|Jun record low F = 39
|Jul record low F = 41
|Aug record low F = 40
|Sep record low F = 37
|Oct record low F = 30
|Nov record low F = 26
|Dec record low F = 18
|year record low F = 18
|Jan rain inch = 9.60
|Feb rain inch = 9.10
|Mar rain inch = 7.05
|Apr rain inch = 2.56
|May rain inch = 1.20
|Jun rain inch = 0.24
|Jul rain inch = 0.01
|Aug rain inch = 0.12
|Sep rain inch = 0.50
|Oct rain inch = 2.33
|Nov rain inch = 7.47
|Dec rain inch = 7.29
|year rain inch = 47.47
|rain colour = green
|source 1 = http://www.weather.com/weather/wxclimatology/monthly/graph/94941
|date=August 2010
}}

Mill Valley is also affected by [[microclimate]] conditions in the several box canyons with steep north-facing slopes and dense forests which span the southern and western city limits, which, along with the coastal fog, all conspire to make many of the dense forested regions of Mill Valley noticeably cooler and moister, on average, than other regions of town. This microclimate is what makes for the favorable ecology required by the [[Sequoia sempervirens|Coastal Redwood]] forests which still cover much of the town and surrounding area, and have played such a pivotal role throughout the history of Mill Valley.