October weather forecast and climate
Grantsdale, MT

October, the same as September, is another fresh autumn month in Grantsdale, Montana, with temperature in the range of an average high of 50°F (10°C) and an average low of 30.4°F (-0.9°C).

Temperature

In Grantsdale, Montana, the average high-temperature declines considerably, from an enjoyable 66.2°F (19°C) in September, to a cool 50°F (10°C). In Grantsdale, Montana, the average low-temperature is 30.4°F (-0.9°C).

Humidity

In Grantsdale, the average relative humidity in October is 69%.

Rainfall

In October, the rain falls for 14.5 days. Throughout October, 1.46" (37mm) of precipitation is accumulated. In Grantsdale, during the entire year, the rain falls for 163.6 days and collects up to 20.83" (529mm) of precipitation.

Snowfall

Months with snowfall in Grantsdale are January through May, September through December. In Grantsdale, during October, snow falls for 3.5 days and regularly aggregates up to 1.54" (39mm) of snow. In Grantsdale, Montana, during the entire year, snow falls for 101.1 days, and aggregates up to 59.17" (1503mm) of snow.

Daylight

In October, the average length of the day is 10.9h.

Sunshine

In Grantsdale, the average sunshine in October is 7.3h.

UV index

The average daily maximum UV index in October is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.

What is the temperature in October in Grantsdale?

The average high-temperature, in October, in Grantsdale, Montana, is 50°F (10°C), while the average low-temperature is 30.4°F (-0.9°C).

What is the average humidity in October in Grantsdale?

In Grantsdale, Montana, the average relative humidity in October is 69%.

How much does it rain in Grantsdale in October?

In Grantsdale, in October, it is raining for 14.5 days, with typically 1.46" (37mm) of accumulated precipitation.

How many days does it snow in October in Grantsdale?

In Grantsdale, Montana, during October, snow falls for 3.5 days and regularly aggregates up to 1.54" (39mm) of snow.

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

In Grantsdale, Montana, the average length of the day in October is 10.9h.

How long on average sun shines in October in Grantsdale?

The average sunshine in October in Grantsdale, Montana, is 7.3h.

How high is the UV index in October in Grantsdale?

In October, the average daily maximum UV index in Grantsdale is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in October - Grantsdale, MT
  • Average high temperature in October: 50°F

The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.8°F).

  • Average low temperature in October: 30.4°F

The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (14°F).

Average pressure in October - Grantsdale, MT
  • Average pressure in October: 30.06"

The month with the highest atmospheric pressure is January (30.21").
The month with the lowest atmospheric pressure is June (29.93").

Average wind speed in October - Grantsdale, MT
  • Average wind speed in October: 4.8mph

The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

Average humidity in October - Grantsdale, MT
  • Average humidity in October: 69%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (50%).

Average rainfall in October - Grantsdale, MT
  • Average rainfall in October: 1.46"

The wettest months (with the highest rainfall) are February and April (2.36").
The driest month (with the least rainfall) is August (0.75").

Average rainfall days in October - Grantsdale, MT
  • Average rainfall days in October: 14.5 days

The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is July (8 days).

Average snowfall in October - Grantsdale, MT
  • Average snowfall in October: 1.54"

The month with the highest snowfall is February (13.03").
Months with the least snowfall are June, July and August (0").

Average snowfall days in October - Grantsdale, MT
  • Average snowfall days in October: 3.5 days

The month with the highest number of snowfall days is February (19.3 days).
Months with the least snowfall days are June, July and August (0 days).

Average daylight in October / Average sunshine in October - Grantsdale, MT
  • Average daylight in October: 10.9h

The month with the longest days is June (Average daylight: 15.7h).
The month with the shortest days is December (Average daylight: 8.7h).

  • Average sunshine in October: 7.3h

Months with the most sunshine are July and August (Average sunshine: 11.7h).
Months with the least sunshine are January and December (Average sunshine: 5.4).

Average sunshine days in October - Grantsdale, MT
  • Average sunshine days in October: 13.1 days

The month with the most sunshine days is July (18.9 days).
The month with the least sunshine days is February (5.6 days).

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

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

Average cloud cover in October - Grantsdale, MT
  • Average cloud cover in October: 31

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 13).

Average visibility in October - Grantsdale, MT
  • Average visibility in October: 6mi

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