October weather forecast
Roy, MT

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Weather in October

October, like September, in Roy, Montana, is another fresh autumn month, with an average temperature ranging between min 35.1°F (1.7°C) and max 52.2°F (11.2°C).

Temperature

October signals a clear temperature drop, with average high-temperatures decreasing from September's enjoyable 67.5°F (19.7°C) to a fresh 52.2°F (11.2°C). In Roy, October nights witness a steady temperature drop to a wintry 35.1°F (1.7°C).

Humidity

In October, the average relative humidity in Roy is 62%.

Rainfall

In Roy, in October, during 9.5 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. Throughout the year, in Roy, there are 126.2 rainfall days, and 17.83" (453mm) of precipitation is accumulated.

Snowfall

January through June, September through December are months with snowfall. In Roy, in October, snow falls for 6.1 days, with typically accumulated 4.61" (117mm) of snow. Throughout the year, there are 83.4 snowfall days, and 45.51" (1156mm) of snow is accumulated.

Daylight

In Roy, the average length of the day in October is 10h and 51min.
On the first day of the month, sunrise is at 7:15 am and sunset at 6:54 pm. On the last day of October, sunrise is at 7:58 am and sunset at 5:59 pm MDT.

Sunshine

In October, the average sunshine is 6.5h.

UV index

The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 2 during October translates into the following guidance:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
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Frequently asked questions

What is the usual temperature for Roy in October?

An average high-temperature, in October, in Roy, is 52.2°F (11.2°C) and the average low-temperature is 35.1°F (1.7°C).

What is the average humidity in October in Roy?

In October, the average relative humidity in Roy is 62%.

How much does it rain in Roy in October?

In Roy, Montana, during October, the rain falls for 9.5 days and regularly aggregates up to 1.22" (31mm) of precipitation.

How much does it snow in Roy in October?

In Roy, Montana, in October, snow falls for 6.1 days, with typically accumulated 4.61" (117mm) of snow.

What is the average length of the day in October in Roy?

In Roy, Montana, the average day length in October is 10h and 51min.

When are sunrise and sunset in October in Roy?

In October, on the first day of the month, sunrise is at 7:15 am and sunset at 6:54 pm. On the last day of the month, in Roy, sunrise is at 7:58 am and sunset at 5:59 pm MDT.

How long on average sun shines in October in Roy?

In October, the average sunshine duration is 6.5h.

What are the months with the lowest UV index in Roy?

The months with the lowest UV index in Roy, Montana, are January through April, October through December, with an average maximum UV index of 2.

What is the UV index intensity in October in Roy?

The average daily maximum UV index in October in Roy, Montana, is 2. A UV Index value of 2, and less, symbolizes a minimal 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
Roy, MT

Average temperature in October - Roy, MT
  • Average high temperature in October: 52.2°F

The warmest month (with the highest average high temperature) is July (78.8°F).
The months with the lowest average high temperature are February and December (29.1°F).

  • Average low temperature in October: 35.1°F

The month with the highest average low temperature is August (54.5°F).
The coldest month (with the lowest average low temperature) is February (15.3°F).

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Average pressure in October
Roy, MT

Average pressure in October - Roy, MT
  • Average pressure in October: 29.99"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in October
Roy, MT

Average wind speed in October - Roy, MT
  • Average wind speed in October: 9.9mph

The windiest months (with the highest average wind speed) are January, April and October (9.9mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).

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Average humidity in October
Roy, MT

Average humidity in October - Roy, MT
  • Average humidity in October: 62%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (47%).

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Average rainfall in October
Roy, MT

Average rainfall in October - Roy, MT
  • Average rainfall in October: 1.22"

The wettest month (with the highest rainfall) is May (3.39").
The driest month (with the least rainfall) is December (0.71").

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Average rainfall days in October
Roy, MT

Average rainfall days in October - Roy, MT
  • Average rainfall days in October: 9.5 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (5.4 days).

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Average snowfall in October
Roy, MT

Average snowfall in October - Roy, MT
  • Average snowfall in October: 4.61"

The month with the highest snowfall is April (9.13").
The months with the least snowfall are July and August (0").

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Average snowfall days in October
Roy, MT

Average snowfall days in October - Roy, MT
  • Average snowfall days in October: 6.1 days

The month with the highest number of snowfall days is February (15.2 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in October /
Average sunshine in October
Roy, MT

Average daylight in October / Average sunshine in October - Roy, MT
  • Average daylight in October: 10h and 5min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in October: 6h and 3min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 30min).

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Average sunshine days in October
Roy, MT

Average sunshine days in October - Roy, MT
  • Average sunshine days in October: 15.3 days

The month with the most sunshine days is September (19.3 days).
The month with the least sunshine days is April (8.3 days).

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Average UV index in October
Roy, MT

Average UV index in October - Roy, MT
  • Average UV index in October: 2

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

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Average cloud cover in October
Roy, MT

Average cloud cover in October - Roy, MT
  • Average cloud cover in October: 30

The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 16).

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Average visibility in October
Roy, MT

Average visibility in October - Roy, MT
  • 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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Roy, Montana, USA

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