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Weather in September in Grand Junction, Colorado

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< September >
 
Normal Max/ High Temperature 27°C (81°F)
 
Average Temperature 19°C (67°F)
 
Min/ Low Temperature 12°C (53°F)
 
Normal Precipitation 21mm (0.8in)
Number of Wet Days (probability of rain on a day) 5 (17%)
Average Sunlight per day 09:34
Average Daylight per day 12:23
Sunny (Cloudy) Daylight Hours 78% (22%)
Sun altitude at solar noon on the 21st day.
51.4°


  • The average temperature in Grand Junction, Colorado in September is somewhat warm at 19.4 °C (66.92 °F).
  • Afternoons can be hot with average high temperatures reaching 27.3 °C (81.1 °F).
  • Overnight temperatures are generally quite mild with an average low of 11.6 °C (52.9 °F).
  • The variation/ range of daily average temperatures in September is 15.7 °C (28.3 °F).
  • The weather in September is somewhat parched with occasional rain. A paltry 20.8mm (0.8in) of H2O is unloaded during on average 5 days.
  • The heavens above Grand Junction, Colorado are nice and sunny with on balance a considerable 9:34 of brilliant solar radiation daily.
  • The shortest day is 11:45 long and the longest day is 13:01 long with an average length of 12:23.
  • There are approximately 2:39 per day when bright sunshine is absent due to cloud, haze or the sun being too low on the horizon to register.
  • It is sunny approximately 78.3% of daylight hours and cloudy 21.7% of daylight hours.

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Weather Trend Graph for September in Grand Junction, Colorado, Usa

Graph of weather in Grand Junction, Colorado in September

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