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 arrival of September corresponds with a minor reduction in the average high-temperature, down from August's agreeable 72.5°F (22.5°C) to a refreshing 66.2°F (19°C). A noticeable temperature swing characterizes Sillsville's September nights, dipping to an average of 37.9°F (3.3°C).Humidity
In September, the average relative humidity in Sillsville, Colorado, is 53%.Rainfall
The month with the least rainfall in Sillsville, Colorado, is September, when the rain falls for 5.7 days and typically collects 0.35" (9mm) of precipitation.Snowfall
July through September are months without snowfall.Daylight
In Sillsville, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:36 pm. On the last day of September, in Sillsville, Colorado, sunrise is at 7:02 am and sunset at 6:50 pm MDT.
Sunshine
The average sunshine in September is 11.2h.UV index
The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 3 in September leads to these recommendations:
Adopt protective measures - It is advised to guard against sun damage. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Frequently asked questions
What are September temperatures in Sillsville?
What is the average humidity in September in Sillsville?
What is the driest month in Sillsville?
How much does it rain in Sillsville in September?
When it does not snow in Sillsville?
Does it snow in Sillsville in September?
How many hours of daylight does Sillsville have in September?
When is the sunrise / sunset in September in Sillsville?
How many hours of sunshine does Sillsville have in September?
What is the UV index reading in September in Sillsville?
Average temperature in September
Sillsville, CO
- Average high temperature in September: 66.2°F
The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in September: 37.9°F
The month with the highest average low temperature is July (44.6°F).
The coldest month (with the lowest average low temperature) is January (1.8°F).
Average pressure in September
Sillsville, CO
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is April (29.94"Hg).
Average wind speed in September
Sillsville, CO
- Average wind speed in September: 4.8mph
The windiest months (with the highest average wind speed) are May and June (6.3mph).
The calmest month (with the lowest average wind speed) is December (4.5mph).
Average humidity in September
Sillsville, CO
- Average humidity in September: 53%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is June (44%).
Average rainfall in September
Sillsville, CO
- Average rainfall in September: 0.35"
The wettest months (with the highest rainfall) are February and March (1.18").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in September
Sillsville, CO
- Average rainfall days in September: 5.7 days
The month with the highest number of rainy days is July (10.3 days).
The month with the least rainy days is October (4.1 days).
Average snowfall in September
Sillsville, CO
- Average snowfall in September: 0"
The month with the highest snowfall is February (9.37").
The months with the least snowfall are July, August and September (0").
Average snowfall days in September
Sillsville, CO
- Average snowfall days in September: 0.4 days
The month with the highest number of snowfall days is February (16.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Sillsville, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 6h and 24min).
Average sunshine days in September
Sillsville, CO
- Average sunshine days in September: 21.3 days
The month with the most sunshine days is June (23.1 days).
The month with the least sunshine days is February (10.3 days).
Average UV index in September
Sillsville, CO
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Sillsville, CO
- Average cloud cover in September: 12
The month with the most cloud cover is February (Cloud cover 35).
The months with the least cloud cover are June and September (Cloud cover 12).
Average visibility in September
Sillsville, CO
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Sillsville, Colorado, USA
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