October weather forecast
Big Sky, MT

Vast fields and planted forests near the scenic mountainous region in Big Sky, Montana
Vast fields and planted forests near the scenic mountainous region in Big Sky, Montana

Weather in October

October, the same as September, in Big Sky, Montana, is a frosty autumn month, with temperature in the range of an average high of 45.5°F (7.5°C) and an average low of 27.5°F (-2.5°C).

Temperature

In Big Sky, the average high-temperature in October significantly decreases from a comfortable 63.5°F (17.5°C) in September to a frosty 45.5°F (7.5°C). The average low-temperature, in Big Sky, is 27.5°F (-2.5°C).

Humidity

In October, the average relative humidity in Big Sky is 71%.

Rainfall

In Big Sky, during 8.3 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. Throughout the year, there are 116.1 rainfall days, and 23.5" (597mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Big Sky are January through December. In October, it is snowing for 13.8 days. Throughout October, 12.44" (316mm) of snow is accumulated. Throughout the year, in Big Sky, there are 151.6 snowfall days, and 124.06" (3151mm) of snow is accumulated.

Daylight

The average length of the day in October is 10h and 56min.
On the first day of the month, sunrise is at 7:23 am and sunset at 7:05 pm. On the last day of October, sunrise is at 8:03 am and sunset at 6:14 pm MDT.

Sunshine

In Big Sky, Montana, the average sunshine in October is 6.6h.

UV index

In October, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 2 in October interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in October in Big Sky?

The average high-temperature, in October, is 45.5°F (7.5°C), while the average low-temperature is 27.5°F (-2.5°C).

What is the average humidity in October in Big Sky?

In Big Sky, Montana, the average relative humidity in October is 71%.

How much does it rain in Big Sky in October?

In Big Sky, Montana, during October, the rain falls for 8.3 days and regularly aggregates up to 2.01" (51mm) of precipitation.

How many days does it snow in October in Big Sky?

In Big Sky, Montana, in October, during 13.8 snowfall days, 12.44" (316mm) of snow is typically accumulated.

What is the average length of the day in October in Big Sky?

In October, the average day length in Big Sky, Montana, is 10h and 56min.

What time are sunrise and sunset in October in Big Sky?

On the first day of October, sunrise is at 7:23 am and sunset at 7:05 pm. On the last day of the month, sunrise is at 8:03 am and sunset at 6:14 pm MDT.

How long on average sun shines in October in Big Sky?

The average sunshine duration in October in Big Sky, Montana, is 6.6h.

What is the UV index reading in October in Big Sky?

In October, the average daily maximum UV index in Big Sky is 2. A UV Index value of 2, and less, symbolizes a low health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Big Sky, MT

Average temperature in October - Big Sky, MT
  • Average high temperature in October: 45.5°F

The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is December (22.5°F).

  • Average low temperature in October: 27.5°F

The month with the highest average low temperature is August (45.1°F).
The coldest month (with the lowest average low temperature) is December (7.9°F).

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Average pressure in October
Big Sky, MT

Average pressure in October - Big Sky, MT
  • Average pressure in October: 30.06"Hg

The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in October
Big Sky, MT

Average wind speed in October - Big Sky, MT
  • Average wind speed in October: 6.1mph

The windiest month (with the highest average wind speed) is January (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in October
Big Sky, MT

Average humidity in October - Big Sky, MT
  • Average humidity in October: 71%

The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is August (51%).

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Average rainfall in October
Big Sky, MT

Average rainfall in October - Big Sky, MT
  • Average rainfall in October: 2.01"

The wettest months (with the highest rainfall) are April and May (2.91").
The driest month (with the least rainfall) is July (1.18").

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Average rainfall days in October
Big Sky, MT

Average rainfall days in October - Big Sky, MT
  • Average rainfall days in October: 8.3 days

The month with the highest number of rainy days is June (16.6 days).
The month with the least rainy days is February (4.3 days).

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Average snowfall in October
Big Sky, MT

Average snowfall in October - Big Sky, MT
  • Average snowfall in October: 12.44"

The month with the highest snowfall is April (19.88").
The month with the least snowfall is August (0.08").

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Average snowfall days in October
Big Sky, MT

Average snowfall days in October - Big Sky, MT
  • Average snowfall days in October: 13.8 days

The month with the highest number of snowfall days is March (21 days).
The month with the least snowfall days is August (0.3 days).

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Average daylight in October /
Average sunshine in October
Big Sky, MT

Average daylight in October / Average sunshine in October - Big Sky, MT
  • Average daylight in October: 10h and 56min

The month with the longest days is June (Average daylight: 15h and 35min).
The month with the shortest days is December (Average daylight: 8h and 49min).

  • Average sunshine in October: 6h and 36min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days in October
Big Sky, MT

Average sunshine days in October - Big Sky, MT
  • Average sunshine days in October: 13.6 days

The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is May (5.7 days).

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Average UV index in October
Big Sky, MT

Average UV index in October - Big Sky, MT
  • Average UV index in October: 2

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January and February (UV index 1).

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Average cloud cover in October
Big Sky, MT

Average cloud cover in October - Big Sky, MT
  • Average cloud cover in October: 34

The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is July (Cloud cover 17).

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Average visibility in October
Big Sky, MT

Average visibility in October - Big Sky, MT
  • Average visibility in October: 6mi

The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).

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