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
In the transition to September, Grant observes a minor drop in the average high-temperature, shifting from an agreeable 68.7°F (20.4°C) in August to a comfortable 62.8°F (17.1°C). In Grant, the September nights descend to a significantly cooler average of 37.9°F (3.3°C) compared to daytime highs.Humidity
In September, the average relative humidity is 54%.Rainfall
In September, the rain falls for 13 days. Throughout September, 1.38" (35mm) of precipitation is accumulated. Throughout the year, there are 138.3 rainfall days, and 23.07" (586mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through December. In Grant, in September, during 3.5 snowfall days, 1.26" (32mm) of snow is typically accumulated. In Grant, during the entire year, snow falls for 127.6 days and aggregates up to 93.94" (2386mm) of snow.Daylight
The average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:31 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:46 pm MDT.
Sunshine
The average sunshine in September is 11h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: A maximum high daily UV index of 3 during September translates into the following directions:
Ensure safety - Recommendations to avert sunburn are presented. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Stay sun-safe with clothing that is both closely woven and worn loosely. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How many days does it rain in September?
How much 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 Grant have in September?
How high is the UV index in September?
Average temperature in September
Grant, CO
- Average high temperature in September: 62.8°F
The warmest month (with the highest average high temperature) is July (70°F).
The month with the lowest average high temperature is December (26.8°F).
- Average low temperature in September: 37.9°F
The month with the highest average low temperature is July (44.2°F).
The coldest months (with the lowest average low temperature) are January and December (8.1°F).
Average pressure in September
Grant, CO
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are April and May (29.93"Hg).
Average wind speed in September
Grant, CO
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in September
Grant, CO
- Average humidity in September: 54%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is June (51%).
Average rainfall in September
Grant, CO
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is May (3.7").
The driest month (with the least rainfall) is December (0.79").
Average rainfall days in September
Grant, CO
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is July (23.9 days).
The month with the least rainy days is November (3.4 days).
Average snowfall in September
Grant, CO
- Average snowfall in September: 1.26"
The month with the highest snowfall is May (17.48").
The month with the least snowfall is July (0.12").
Average snowfall days in September
Grant, CO
- Average snowfall days in September: 3.5 days
The month with the highest number of snowfall days is April (18.5 days).
The months with the least snowfall days are July and August (0.5 days).
Average daylight in September /
Average sunshine in September
Grant, 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 24min).
- Average sunshine in September: 11h and 0min
The month with the most sunshine is August (Average sunshine: 11h and 36min).
The month with the least sunshine is February (Average sunshine: 6h and 18min).
Average sunshine days in September
Grant, CO
- Average sunshine days in September: 13.4 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (4.1 days).
Average UV index in September
Grant, CO
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 4).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Grant, CO
- Average cloud cover in September: 18
The month with the most cloud cover is February (Cloud cover 38).
The months with the least cloud cover are June and September (Cloud cover 18).
Average visibility in September
Grant, CO
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Grant, Colorado, USA
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