September weather forecast and climate
Brookside, CO

Weather in September

The first month of the autumn, September, is also an agreeable month in Brookside, Colorado, with temperature in the range of an average low of 48.2°F (9°C) and an average high of 73.2°F (22.9°C).

Temperature

In Brookside, the average high-temperature in September slightly decreases, from a moderately hot 79.7°F (26.5°C) in August, to a pleasant 73.2°F (22.9°C). In Brookside, the average low-temperature is 48.2°F (9°C).

Humidity

In Brookside, the average relative humidity in September is 47%.

Rainfall

In Brookside, it is raining for 10.1 days, with typically 0.79" (20mm) of accumulated precipitation. In Brookside, Colorado, during the entire year, the rain falls for 108.6 days and collects up to 10.83" (275mm) of precipitation.

Snowfall

In Brookside snow does not fall in June through September.

Daylight

In Brookside, the average length of the day is 12.4h.

Sunshine

The average sunshine in Brookside is 11.1h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 4 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Brookside?

In September, the average high-temperature is 73.2°F (22.9°C), and the average low-temperature is 48.2°F (9°C).

What is the average humidity in September in Brookside?

In Brookside, Colorado, the average relative humidity in September is 47%.

How much does it rain in Brookside in September?

In Brookside, Colorado, in September, during 10.1 rainfall days, 0.79" (20mm) of precipitation is typically accumulated.

Does it snow in Brookside in September?

In Brookside, Colorado, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Brookside?

June through September are months without snowfall in Brookside, Colorado.

What is the average length of the day in September in Brookside?

The average length of the day in September in Brookside, Colorado, is 12.4h.

How many hours of sunshine does Brookside have in September?

In Brookside, Colorado, the average sunshine in September is 11.1h.

How high is the UV index in September in Brookside?

In Brookside, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe exposure to the Sun's UV rays.

Average temperature in September
Brookside, CO

Average temperature in September - Brookside, CO
  • Average high temperature in September: 73.2°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in September: 48.2°F

The month with the highest average low temperature is July (55.8°F).
The coldest month (with the lowest average low temperature) is December (18.5°F).

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Average pressure in September
Brookside, CO

Average pressure in September - Brookside, CO
  • Average pressure in September: 30.04"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is April (29.91").

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Average wind speed in September
Brookside, CO

Average wind speed in September - Brookside, CO
  • Average wind speed in September: 6mph

The windiest months (with the highest average wind speed) are January, February and March (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average humidity in September
Brookside, CO

Average humidity in September - Brookside, CO
  • Average humidity in September: 47%

Months with the highest relative humidity are January and February (69%).
The month with the lowest relative humidity is June (40%).

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Average rainfall in September
Brookside, CO

Average rainfall in September - Brookside, CO
  • Average rainfall in September: 0.79"

The wettest month (with the highest rainfall) is July (2.2").
The driest months (with the least rainfall) are January and November (0.31").

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Average rainfall days in September
Brookside, CO

Average rainfall days in September - Brookside, CO
  • Average rainfall days in September: 10.1 days

The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is November (2.7 days).

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Average snowfall in September
Brookside, CO

Average snowfall in September - Brookside, CO
  • Average snowfall in September: 0"

The month with the highest snowfall is February (5.63").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Brookside, CO

Average snowfall days in September - Brookside, CO
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (8.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Brookside, CO

Average daylight in September / Average sunshine in September - Brookside, CO
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 11.1h

The month with the most sunshine is June (Average sunshine: 11.9h).
The month with the least sunshine is February (Average sunshine: 7h).

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Average sunshine days in September
Brookside, CO

Average sunshine days in September - Brookside, CO
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is November (24.7 days).
The month with the least sunshine days is July (4.7 days).

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Average UV index in September
Brookside, CO

Average UV index in September - Brookside, CO
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, October, November and December (UV index 2).

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Average cloud cover in September
Brookside, CO

Average cloud cover in September - Brookside, CO
  • Average cloud cover in September: 14

Months with the most cloud cover are February and April (Cloud cover 23).
Months with the least cloud cover are June, September, October and November (Cloud cover 14).

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Average visibility in September
Brookside, CO

Average visibility in September - Brookside, CO
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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