September weather forecastEllicott, CO
September
Weather in September
The first month of the autumn, September, is still a warm month in Ellicott, Colorado, with an average temperature ranging between max 73.4°F (23°C) and min 51.3°F (10.7°C).Temperature
September is characterized by a slight reduction in average high-temperature, easing from 79.5°F (26.4°C) in August to a still warm 73.4°F (23°C). Ellicott registers a pronounced decline from daytime peak temperatures, averaging a cool 51.3°F (10.7°C) lows in September.Humidity
In September, the average relative humidity is 48%.Rainfall
In Ellicott, during September, the rain falls for 12.1 days and regularly aggregates up to 1.02" (26mm) of precipitation. In Ellicott, during the entire year, the rain falls for 104.4 days and collects up to 11.26" (286mm) of precipitation.Snowfall
In Ellicott, Colorado, snow does not fall in June through September.Daylight
In Ellicott, Colorado, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:27 am and sunset at 7:27 pm. On the last day of September, in Ellicott, sunrise is at 6:53 am and sunset at 6:41 pm MDT.
Sunshine
In September, the average sunshine is 10.9h.UV index
In Ellicott, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 5 during September translates into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Experience reduced UV exposure by about half when donning a wide-brim hat. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ellicott, CO
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is December (38.7°F).
- Average low temperature in September: 51.3°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is December (20.5°F).
Average pressure in September
Ellicott, CO
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is April (29.9"Hg).
Average wind speed in September
Ellicott, CO
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Ellicott, CO
- Average humidity in September: 48%
The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is June (44%).
Average rainfall in September
Ellicott, CO
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is July (2.72").
The driest months (with the least rainfall) are January and December (0.2").
Average rainfall days in September
Ellicott, CO
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is December (1.8 days).
Average snowfall in September
Ellicott, CO
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Ellicott, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (6.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Ellicott, CO
- Average daylight in September: 12h and 24min
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: 10h and 54min
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 48min).
Average sunshine days in September
Ellicott, CO
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is December (25.3 days).
The month with the least sunshine days is July (6.8 days).
Average UV index in September
Ellicott, CO
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in September
Ellicott, CO
- Average cloud cover in September: 17
The month with the most cloud cover is April (Cloud cover 25).
The months with the least cloud cover are June, October and November (Cloud cover 16).
Average visibility in September
Ellicott, 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).
