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
Barr Lake's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's tropical 88.2°F (31.2°C) to a warm 79.7°F (26.5°C). Barr Lake experiences a significant downturn from peak daytime temperatures throughout September, with the average low-temperature dipping to a fresh 54°F (12.2°C).Humidity
The average relative humidity in September in Barr Lake, Colorado, is 41%.Rainfall
In Barr Lake, Colorado, in September, it is raining for 7.2 days, with typically 0.43" (11mm) of accumulated precipitation. In Barr Lake, Colorado, during the entire year, the rain falls for 80.6 days and collects up to 5.87" (149mm) of precipitation.Snowfall
In Barr Lake, snow does not fall in June through September.Daylight
In Barr Lake, Colorado, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 6:27 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:42 pm MDT.
Sunshine
In September, the average sunshine is 10.9h.UV index
The average daily maximum UV index in September in Barr Lake is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 5 during September leads to these instructions:
Ensure safety - Imperative it is to shield skin and eyes from damage. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Boost your sun resistance with garments that are densely woven yet spacious. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Barr Lake in September?
What is the average humidity in September in Barr Lake?
How much does it rain in Barr Lake in September?
When it does not snow in Barr Lake?
Does it snow in Barr Lake in September?
What is the average length of the day in September in Barr Lake?
When are sunrise and sunset in September in Barr Lake?
How long on average sun shines in September in Barr Lake?
What is the UV index reading in September in Barr Lake?
Average temperature in September
Barr Lake, CO
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is December (40.8°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is December (21.2°F).
Average pressure in September
Barr Lake, 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 (29.9"Hg).
Average wind speed in September
Barr Lake, CO
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is December (6mph).
Average humidity in September
Barr Lake, CO
- Average humidity in September: 41%
The months with the highest relative humidity are January and February (64%).
The month with the lowest relative humidity is August (40%).
Average rainfall in September
Barr Lake, CO
- Average rainfall in September: 0.43"
The wettest month (with the highest rainfall) is May (0.98").
The driest month (with the least rainfall) is December (0.12").
Average rainfall days in September
Barr Lake, CO
- Average rainfall days in September: 7.2 days
The month with the highest number of rainy days is May (10.8 days).
The month with the least rainy days is December (2.6 days).
Average snowfall in September
Barr Lake, CO
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.89").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Barr Lake, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Barr Lake, 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 48min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days in September
Barr Lake, CO
- Average sunshine days in September: 18.7 days
The month with the most sunshine days is December (25.8 days).
The month with the least sunshine days is July (14.8 days).
Average UV index in September
Barr Lake, 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
Barr Lake, 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, August and September (Cloud cover 16).
Average visibility in September
Barr Lake, 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).
Barr Lake, Colorado, USA
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