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Climate
Summary
United States of America

BOULDER, COLORADO


Home > North America > United States > Colorado
Elevation: 5288 feet     Latitude: 40 02N     Longitude: 105 13W

WEATHER
 
CURRENT CONDITIONS

Sunrise/Set
07:57 am
09:58 pm
Local Time
3:03 am EDT
3 May, 2024
 
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MONTHLY - ALL WEATHER AVERAGES   [ Show Summary ]
[ °C ]   °F
TEMPERATURE 
Average Temperature
Years on Record: 64  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F51333439485666727163524134

Average High Temperature
Years on Record: 64  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F64454652616980858477665446

Average Low Temperature
Years on Record: 64  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F38212227364453595850392922

Highest Recorded Temperature
Years on Record: 64  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F104747986859310410410297907974

Lowest Recorded Temperature
Years on Record: 64  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F-33-33-28-1342030403623-2-12-20

Average Number of Days Above 90F/32C
Years on Record: 10  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days44.6------------0.310161350.3------

Average Number of Days Below 32F/0C
Years on Record: 10  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days129.62522221010.3------0.361924

Average Number of Days Below 0F/-17C
Years on Record: 12  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days5.71.51.30.8---------------------1.11



PRECIPITATION 
Average Precipitation
Years on Record: 67  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in.18.30.50.81.62.73.11.71.81.61.41.50.90.8



PRECIPITATION - RAIN 
Average Number of Rainy Days
Years on Record: 67  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days41.31.72.34.25.76.23.73.93.52.832.12.2



PRECIPITATION - SNOW 
Average Snowfall
Years on Record: 63  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in.73.28.210.215.311.92.8---------0.64.89.69.8



HUMIDITY 
Average Relative Humidity
Years on Record: 12  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
%52565755525447474847485556

Average Dew Point
Years on Record: 12  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F30151820263744484839302117



DEGREE DAYS 
Heating Degree Days
Years on Record: 64  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days5515.3992875.8790.5495263.5---------45387.5705961

Cooling Degree Days
Years on Record: 64  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days448---------------45217186------------

Growing Degree Days
Years on Record: 64  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days2512------------201.549568265140577.5------



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 
Hours12.710.211.212.513.814.915.515.214.212.911.610.49.9



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 
kWh/m24.52.23.24.45.46.26.76.65.84.93.72.52.1

Average Daily Solar Radiation - Diffuse
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m21.40.711.41.82.12.32.21.91.410.80.6

Average Daily Solar Radiation - Reflected
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m25.144.65.45.65.75.85.95.75.65.34.34

Average Daily Solar Radiation - Direct
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m25.74.35.15.85.96.46.86.96.36.25.74.84.3

Maximum Daily Solar Radiation - Global
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m24.52.23.24.45.46.26.76.65.84.93.72.52.1

Maximum Daily Solar Radiation - Diffuse
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m21.60.81.11.522.42.52.321.61.20.90.7

Maximum Daily Solar Radiation - Reflected
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m25.94.65.76.56.36.36.86.36.26.35.854.7

Maximum Daily Solar Radiation - Direct
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m27.15.36.87.67.47.89.487.37.46.65.95.4

Minimum Daily Solar Radiation - Global
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m23.91.92.63.84.84.75.865.34.33.32.11.7

Minimum Daily Solar Radiation - Diffuse
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m21.20.60.81.11.61.91.821.81.30.90.60.5

Minimum Daily Solar Radiation - Reflected
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m24.33.33.64.54.94.35.15.45.24.94.53.43.1

Minimum Daily Solar Radiation - Direct
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m24.33.33.54.34.73.65.15.85.34.94.63.43.1




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