September weather forecastGrover, CO
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Grover, Colorado, with temperature in the range of an average high of 79.3°F (26.3°C) and an average low of 53.2°F (11.8°C).Temperature
The advent of September brings a subtle shift in temperature, with the average high moving from a hot 87.1°F (30.6°C) in August to a warm 79.3°F (26.3°C). Compared to daytime temperatures, Grover's temperature drops significantly, averaging a fresh 53.2°F (11.8°C) during the nights of September.Humidity
August and September, with an average relative humidity of 44%, are the least humid months.Rainfall
In Grover, in September, it is raining for 9.5 days, with typically 0.91" (23mm) of accumulated precipitation. Throughout the year, there are 108.3 rainfall days, and 12.32" (313mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Grover, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:24 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:39 pm MDT.
Sunshine
In Grover, Colorado, the average sunshine in September is 10.7h.UV index
In Grover, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Make use of precautions - It is urged to ward off sun damage. To avoid the Sun's strongest rays, limit exposure around the mid-day period. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grover, CO
- Average high temperature in September: 79.3°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (38.3°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).
Average pressure in September
Grover, CO
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Grover, CO
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (8.7mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in September
Grover, CO
- Average humidity in September: 44%
The month with the highest relative humidity is December (64%).
The months with the lowest relative humidity are August and September (44%).
Average rainfall in September
Grover, CO
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is May (2.68").
The driest months (with the least rainfall) are January and December (0.31").
Average rainfall days in September
Grover, CO
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (2.9 days).
Average snowfall in September
Grover, CO
- Average snowfall in September: 0"
The month with the highest snowfall is April (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Grover, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (9.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Grover, CO
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 10h and 42min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days in September
Grover, CO
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is January (23.4 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in September
Grover, CO
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Grover, CO
- Average cloud cover in September: 18
The months with the most cloud cover are February and April (Cloud cover 29).
The month with the least cloud cover is June (Cloud cover 17).
Average visibility in September
Grover, CO
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
