September weather forecast and climate
Granby, CO

What is the temperature in September in Granby?

In Granby, in September, the average high-temperature is 68°F (20°C), and the average low-temperature is 33.1°F (0.6°C).

How much does it rain in Granby in September?

Throughout September, in Granby, 1.1" (27.9mm) of precipitation is accumulated.
Average temperature in September - Granby, CO
  • Average high temperature in September: 68°F

The warmest month (with the highest average high temperature) is July (75°F).
The month with the lowest average high temperature is January (28°F).

  • Average low temperature in September: 33°F

The month with the highest average low temperature is July (41°F).
Coldest months (with the lowest average low temperature) are January and February (1°F).

Average rainfall in September - Granby, CO
  • Average rainfall in September: 1.1"

The wettest month (with the highest rainfall) is August (1.7").
Driest months (with the lowest rainfall) are February and October (0.8").

Average daylight in September - Granby, CO
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.4h).