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United States of America

MOUNT WILSON - NORTHWEST, CALIFORNIA


Home > North America > United States > California
Elevation: 1295 meters     Latitude: 34 15N     Longitude: 118 06W

WEATHER
 
CURRENT CONDITIONS

Sunrise/Set
10:12 am
08:59 pm

Local Time
7:14 pm EDT
31 October, 2024
 
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MONTHLY - ALL WEATHER AVERAGES   [ Show Summary ]
[ °F ]   °C
TEMPERATURE 
Average Temperature
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
C13.64.45.47.511.51519.724.323.620.714.69.86.2

Average High Temperature
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
C197.69.412.517.621.726.931.630.727.219.813.69.2

Average Low Temperature
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
C8.11.21.42.45.48.312.41716.414.39.65.93.2

Highest Recorded Temperature
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
C41.72022.226.734.437.237.841.740.641.134.426.122.8

Lowest Recorded Temperature
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
C-12.2-12.2-7.8-7.2-6.1-3.31.16.14.42.8-3.3-6.1-6.7

Average Number of Days Above 90F/32C
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days40.4---------0.20.75.715.612.35.30.6------

Average Number of Days Below 32F/0C
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days46.311.9119.830.4------------0.42.37.5



PRECIPITATION 
Average Precipitation
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
mm1018182224152107182131425117172

Average Number of Days With Precipitation
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days3966652------11246

Most Reported Precipitation in a Month
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
mm12261226777706621133341332222131963510

Least Reported Precipitation in a Month
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
mm---5---------------------------------

Most Precipitation Reported in a Day
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
mm421.9421.9347.737928450.529.712.732.5174182.6208306.6

Avg. No. of Days w/Precip. Above 0.2in/5mm
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days2955541---------1134

Avg. # of Days w/Precip. Above 0.4in/10mm
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days173332---------------123

Avg. No. of Days w/Precip. Above 1in/25mm
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days112321------------------12



PRECIPITATION - SNOW 
Average Snowfall
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
cm95.22921.6187.62---------------6.610.4

Most Snow Reported in a Month
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
cm185.4163.8185.4168.963.515.2------------0.558.462.2



DEGREE DAYS 
Heating Degree Days
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days1115.6260208.9172.283.9355.6------2.837.8103.9205.6

Cooling Degree Days
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days577.2---------5.621.180.6188.3168.396.716.7------

Growing Degree Days
Years on Record: 53  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Days1817.4---------45155290442.6421.9320142.9------



SKY CONDITIONS 
Average Length of Day
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Hours12.610.611.412.413.514.414.914.613.812.811.710.810.4



SOLAR RADIATION 
Average Daily Solar Radiation - Global
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Mj/m219.310.913.919.223.926.627.726.123.920.415.912.310.2

Average Daily Solar Radiation - Diffuse
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Mj/m24.933.94.75.76.56.876.25.1432.7

Average Daily Solar Radiation - Reflected
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Mj/m221.216.718.822.624.224.123.923.123.122.520.818.316.3

Average Daily Solar Radiation - Direct
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Mj/m224.919.220.425.428.730.130.928.527.225.52321.418.9

Maximum Daily Solar Radiation - Global
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Mj/m219.310.913.919.223.926.627.726.123.920.415.912.310.2

Maximum Daily Solar Radiation - Diffuse
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Mj/m25.83.64.65.96.77.88.28.275.94.73.53.1

Maximum Daily Solar Radiation - Reflected
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Mj/m224.218.923.525.726.426.126.426.226.525.425.721.118.9

Maximum Daily Solar Radiation - Direct
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Mj/m230.922.727.830.933.33537.936.434.73131.425.923

Minimum Daily Solar Radiation - Global
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Mj/m216.98.911.415.921.223.324.322.821.918.314.210.98.8

Minimum Daily Solar Radiation - Diffuse
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Mj/m23.82.62.93.74.75.45.35.34.74.12.72.42.2

Minimum Daily Solar Radiation - Reflected
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Mj/m218.112.614.71821.421.221.220.421.119.81815.513.5

Minimum Daily Solar Radiation - Direct
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  
Mj/m219.112.91417.522.823.323.921.822.820.618.416.914.5




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