October weather forecast
Roundup, MT

Weather in October

October, like September, is another mild autumn month in Roundup, Montana, with an average temperature ranging between min 39.7°F (4.3°C) and max 56.3°F (13.5°C).

Temperature

In October, the average high-temperature significantly decreases from an agreeable 72.7°F (22.6°C) in September to a moderate 56.3°F (13.5°C). In Roundup, in October, the average low-temperature is 39.7°F (4.3°C).

Humidity

In Roundup, the average relative humidity in October is 56%.

Rainfall

In Roundup, during October, the rain falls for 9.5 days and regularly aggregates up to 0.83" (21mm) of precipitation. Throughout the year, there are 114.3 rainfall days, and 12.13" (308mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall in Roundup. In Roundup, during October, snow falls for 2.8 days and regularly aggregates up to 0.67" (17mm) of snow. In Roundup, during the entire year, snow falls for 53.5 days and aggregates up to 18.58" (472mm) of snow.

Daylight

In October, the average length of the day in Roundup is 10h and 53min.
On the first day of October in Roundup, sunrise is at 7:13 am and sunset at 6:54 pm. On the last day of the month, sunrise is at 7:54 am and sunset at 6:00 pm MDT.

Sunshine

In October, the average sunshine is 6.3h.

UV index

The average daily maximum UV index in October in Roundup, Montana, is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 3 in October transform into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in October in Roundup?

The average relative humidity in October in Roundup is 56%.

How many days does it rain in October in Roundup?

In Roundup, Montana, during October, the rain falls for 9.5 days and regularly aggregates up to 0.83" (21mm) of precipitation.

How much does it snow in Roundup in October?

In Roundup, Montana, during October, snow falls for 2.8 days and regularly aggregates up to 0.67" (17mm) of snow.

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

In Roundup, the average day length in October is 10h and 53min.

What time are sunrise and sunset in October in Roundup?

In October, on the first day of the month, sunrise is at 7:13 am and sunset at 6:54 pm. On the last day of the month, sunrise is at 7:54 am and sunset at 6:00 pm MDT.

How long on average sun shines in October in Roundup?

In October, the average sunshine duration in Roundup is 6.3h.

What is the UV index intensity in October in Roundup?

In October, the average daily maximum UV index in Roundup is 3. A UV Index estimate of 3 to 5 represents a medium health risk 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
Roundup, MT

Average temperature in October - Roundup, MT
  • Average high temperature in October: 56.3°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (31.1°F).

  • Average low temperature in October: 39.7°F

The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is February (18°F).

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Average pressure in October
Roundup, MT

Average pressure in October - Roundup, 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
Roundup, MT

Average wind speed in October - Roundup, MT
  • Average wind speed in October: 10.4mph

The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest months (with the lowest average wind speed) are July and August (8.5mph).

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Average humidity in October
Roundup, MT

Average humidity in October - Roundup, MT
  • Average humidity in October: 56%

The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is August (39%).

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Average rainfall in October
Roundup, MT

Average rainfall in October - Roundup, MT
  • Average rainfall in October: 0.83"

The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is January (0.55").

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Average rainfall days in October
Roundup, MT

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

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (4.6 days).

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Average snowfall in October
Roundup, MT

Average snowfall in October - Roundup, MT
  • Average snowfall in October: 0.67"

The month with the highest snowfall is February (3.78").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in October
Roundup, MT

Average snowfall days in October - Roundup, MT
  • Average snowfall days in October: 2.8 days

The month with the highest number of snowfall days is February (11.1 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in October / Average sunshine in October - Roundup, MT
  • Average daylight in October: 10h and 53min

The month with the longest days is June (Average daylight: 15h and 45min).
The month with the shortest days is December (Average daylight: 8h and 40min).

  • Average sunshine in October: 6h and 18min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).

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Average sunshine days in October
Roundup, MT

Average sunshine days in October - Roundup, MT
  • Average sunshine days in October: 17 days

The month with the most sunshine days is September (19.5 days).
The month with the least sunshine days is April (12.8 days).

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Average UV index in October
Roundup, MT

Average UV index in October - Roundup, MT
  • Average UV index in October: 3

The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in October
Roundup, MT

Average cloud cover in October - Roundup, MT
  • Average cloud cover in October: 32

The month with the most cloud cover is February (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 16).

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Average visibility in October
Roundup, MT

Average visibility in October - Roundup, 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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