October weather forecast
Derby, CO

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Weather in October

October, the same as September, is another refreshing autumn month in Derby, Colorado, with an average temperature fluctuating between 40.1°F (4.5°C) and 63.3°F (17.4°C).

Temperature

As Derby welcomes October, there is a noticeable shift in the average high-temperature, dropping from September's warm 79.5°F (26.4°C) to a comfortable 63.3°F (17.4°C). Derby reports a steady low-temperature average of 40.1°F (4.5°C) throughout October, revealing a large deviation from the daytime high.

Humidity

The average relative humidity in October in Derby, Colorado, is 46%.

Rainfall

In Derby, in October, during 2.3 rainfall days, 0.24" (6mm) of precipitation is typically accumulated. Throughout the year, there are 48.3 rainfall days, and 3.19" (81mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. October is the month with the most snowfall in Derby. Snow falls for 1.7 days and accumulates 1.42" (36mm) of snow.

Daylight

The average length of the day in October is 11h and 8min.
On the first day of October, sunrise is at 6:56 am and sunset at 6:41 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:58 pm MDT.

Sunshine

In October, the average sunshine in Derby, Colorado, is 7.5h.

UV index

The average daily maximum UV index in October in Derby is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.
Note: A maximum daily UV index of 3 during October morphs into the following directions:
Guard yourself - Avoiding sunburn is suggested. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
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Frequently asked questions

What is the usual temperature for Derby in October?

In October, in Derby, the average high-temperature is 63.3°F (17.4°C), and the average low-temperature is 40.1°F (4.5°C). In July, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, is calculated to be 89.6°F (32°C).

What is the average humidity in October in Derby?

In Derby, the average relative humidity in October is 46%.

How much does it rain in Derby in October?

In October, the rain falls for 2.3 days. Throughout October, 0.24" (6mm) of precipitation is accumulated.

What is the snowiest month in Derby?

October is the month with the most snowfall. Snow falls for 1.7 days and accumulates 1.42" (36mm) of snow.

When does it start to snow in Derby?

October is the first month it typically snows. Throughout October, in the average 1.7 snowfall days, it receives 1.42" (36mm) of snow.

How many hours of daylight does Derby have in October?

In October, the average day length in Derby is 11h and 8min.

When are sunrise and sunset in October in Derby?

In October, on the first day of the month, sunrise is at 6:56 am and sunset at 6:41 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:58 pm MDT.

How many hours of sunshine does Derby have in October?

The average sunshine duration in October in Derby is 7.5h.

What is the UV index reading in October in Derby?

In Derby, the average daily maximum UV index in October is 3. A UV Index value of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Derby, CO

Average temperature in October - Derby, CO
  • Average high temperature in October: 63.3°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (41.2°F).

  • Average low temperature in October: 40.1°F

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).

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Average pressure in October
Derby, CO

Average pressure in October - Derby, CO
  • Average pressure in October: 30.03"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).

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Average wind speed in October
Derby, CO

Average wind speed in October - Derby, CO
  • Average wind speed in October: 6mph

The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is December (5.8mph).

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Average humidity in October
Derby, CO

Average humidity in October - Derby, CO
  • Average humidity in October: 46%

The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is August (39%).

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Average rainfall in October
Derby, CO

Average rainfall in October - Derby, CO
  • Average rainfall in October: 0.24"

The wettest month (with the highest rainfall) is July (0.59").
The driest months (with the least rainfall) are January and December (0.08").

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Average rainfall days in October
Derby, CO

Average rainfall days in October - Derby, CO
  • Average rainfall days in October: 2.3 days

The month with the highest number of rainy days is July (8.2 days).
The month with the least rainy days is February (1.2 days).

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Average snowfall in October
Derby, CO

Average snowfall in October - Derby, CO
  • Average snowfall in October: 1.42"

The month with the highest snowfall is October (1.42").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in October
Derby, CO

Average snowfall days in October - Derby, CO
  • Average snowfall days in October: 1.7 days

The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in October /
Average sunshine in October
Derby, CO

Average daylight in October / Average sunshine in October - Derby, CO
  • Average daylight in October: 11h and 1min

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 October: 7h and 3min

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 42min).

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Average sunshine days in October
Derby, CO

Average sunshine days in October - Derby, CO
  • Average sunshine days in October: 26.7 days

The month with the most sunshine days is December (28.5 days).
The month with the least sunshine days is July (19.6 days).

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Average UV index in October
Derby, CO

Average UV index in October - Derby, CO
  • Average UV index in October: 3

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).

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Average cloud cover in October
Derby, CO

Average cloud cover in October - Derby, CO
  • Average cloud cover in October: 17

The months with the most cloud cover are February, April and May (Cloud cover 25).
The month with the least cloud cover is September (Cloud cover 14).

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Average visibility in October
Derby, CO

Average visibility in October - Derby, CO
  • Average visibility in October: 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).

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Derby, Colorado, USA

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