Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Granite's transition into September involves a gentle shift in temperature, receding from an enjoyable 64.8°F (18.2°C) in August to a still refreshing 58.8°F (14.9°C). Despite substantial daily fluctuations, the average low-temperature is a wintry 34.3°F (1.3°C) during September.Humidity
The average relative humidity in September is 59%.Rainfall
In Granite, during September, the rain falls for 11.8 days and regularly aggregates up to 1.3" (33mm) of precipitation. In Granite, during the entire year, the rain falls for 120.6 days and collects up to 19.29" (490mm) of precipitation.Snowfall
January through December are months with snowfall. In Granite, during September, snow falls for 3.2 days and regularly aggregates up to 1.14" (29mm) of snow. In Granite, during the entire year, snow falls for 142.6 days and aggregates up to 90.39" (2296mm) of snow.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:35 pm. On the last day of September, sunrise is at 7:00 am and sunset at 6:48 pm MDT.
Sunshine
In Granite, the average sunshine in September is 10.8h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 3 in September, converts into the following recommendations:
Heed the precautions - It is counselled to guard against solar damage. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How much does it rain in September?
How many days does it snow in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Granite have in September?
How high is the UV index in September?
Average temperature in September
Granite, CO
- Average high temperature in September: 58.8°F
The warmest month (with the highest average high temperature) is July (66.7°F).
The month with the lowest average high temperature is December (23.5°F).
- Average low temperature in September: 34.3°F
The month with the highest average low temperature is July (40.1°F).
The coldest months (with the lowest average low temperature) are January and December (2.7°F).
Average pressure in September
Granite, CO
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is April (29.94"Hg).
Average wind speed in September
Granite, CO
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is February (7mph).
The calmest months (with the lowest average wind speed) are July and August (4.6mph).
Average humidity in September
Granite, CO
- Average humidity in September: 59%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is June (51%).
Average rainfall in September
Granite, CO
- Average rainfall in September: 1.3"
The wettest month (with the highest rainfall) is July (2.83").
The driest month (with the least rainfall) is November (0.91").
Average rainfall days in September
Granite, CO
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is July (20.3 days).
The month with the least rainy days is November (3.9 days).
Average snowfall in September
Granite, CO
- Average snowfall in September: 1.14"
The month with the highest snowfall is March (15.08").
The month with the least snowfall is August (0.31").
Average snowfall days in September
Granite, CO
- Average snowfall days in September: 3.2 days
The month with the highest number of snowfall days is March (20 days).
The month with the least snowfall days is August (1.3 days).
Average daylight in September /
Average sunshine in September
Granite, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 10h and 5min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).
Average sunshine days in September
Granite, CO
- Average sunshine days in September: 13.6 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is April (6.1 days).
Average UV index in September
Granite, CO
- Average UV index in September: 3
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in September
Granite, CO
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 17).
Average visibility in September
Granite, CO
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
Granite, Colorado, USA
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