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
The shift from August to September coincides with a small decrease in the average high-temperature, down to a warm 78.8°F from a tropical 86.4°F. Prospect Valley measures a considerable dip from daytime highs with an average low-temperature of 54°F during September.Humidity
August and September, with an average relative humidity of 42%, are the least humid months.Rainfall
In September, in Prospect Valley, Colorado, the rain falls for 8.6 days. Throughout September, 0.63" of precipitation is accumulated. Throughout the year, there are 81.5 rainfall days, and 8.7" of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:53 am and sunset at 6:42 pm MDT.
Sunshine
In Prospect Valley, the average sunshine in September is 10.9h.UV index
In Prospect Valley, Colorado, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
FAQ
What is the temperature in September in Prospect Valley?
What is the least humid month in Prospect Valley?
What is the average humidity in September in Prospect Valley?
How much does it rain in Prospect Valley in September?
When it does not snow in Prospect Valley?
Does it snow in Prospect Valley in September?
How many hours of daylight does Prospect Valley have in September?
When is the sunrise / sunset in September in Prospect Valley?
How long on average sun shines in September in Prospect Valley?
How high is the UV index in September in Prospect Valley?
Average temperature in September
Prospect Valley, CO
- Average high temperature in September: 78.8°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is December (40.1°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).
Average pressure in September
Prospect Valley, CO
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Prospect Valley, CO
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest months (with the lowest average wind speed) are September and December (6.5mph).
Average humidity in September
Prospect Valley, CO
- Average humidity in September: 42%
The months with the highest relative humidity are January and February (64%).
The months with the lowest relative humidity are August and September (42%).
Average rainfall in September
Prospect Valley, CO
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is May (1.57").
The driest month (with the least rainfall) is December (0.16").
Average rainfall days in September
Prospect Valley, CO
- Average rainfall days in September: 8.6 days
The month with the highest number of rainy days is July (12.6 days).
The month with the least rainy days is January (1.4 days).
Average snowfall in September
Prospect Valley, CO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.36").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Prospect Valley, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (6.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Prospect Valley, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 10h and 5min
The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days in September
Prospect Valley, CO
- Average sunshine days in September: 17 days
The month with the most sunshine days is December (26.4 days).
The month with the least sunshine days is July (13 days).
Average UV index in September
Prospect Valley, CO
- Average UV index in September: 5
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
Prospect Valley, CO
- Average cloud cover in September: 16
The month with the most cloud cover is April (Cloud cover 28).
The months with the least cloud cover are June and September (Cloud cover 16).
Average visibility in September
Prospect Valley, 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).
Prospect Valley, Colorado, USA
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