Great Falls
Montana, USA
Long-term weather forecast
Long-term weather forecast

October weather forecast and climate
Great Falls, MT

A far view from on top of the vast Missouri River of the City of Lights, Great Falls, Montana, a dusk sky, mirror images in the water
A far view from on top of the vast Missouri River of the City of Lights, Great Falls, Montana, a dusk sky, mirror images in the water
October, like September, is another mild autumn month in Great Falls, Montana, with temperature in the range of an average high of 57.7°F (14.3°C) and an average low of 32.7°F (0.4°C).

Temperature

In Great Falls, the average high-temperature in October decreases, from an agreeable 70.3°F (21.3°C) in September, to a moderate 57.7°F (14.3°C). In October, the average low-temperature is 32.7°F (0.4°C).

Rainfall

In Great Falls, Montana, during October, the rain falls for 6.6 days and regularly aggregates up to 0.9" (21.8mm) of precipitation. Throughout the year, there are 99.9 rainfall days, and 14.8" (374.8mm) of precipitation is accumulated.

Snowfall

January through June, August through December are months with snowfall in Great Falls.

Daylight

In Great Falls, Montana, the average length of the day in October is 10.8h.

Sunshine

The average sunshine in October is 6.5h.

UV index

In October, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for average individuals.
The average daily UV index of 3 in October transform into the following instructions:
Take precautions - Protection against sun damage is advised. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in October in Great Falls?

In Great Falls, Montana, in October, the average high-temperature is 57.7°F (14.3°C), and the average low-temperature is 32.7°F (0.4°C).

How much does it rain in Great Falls in October?

In Great Falls, Montana, during October, the rain falls for 6.6 days and regularly aggregates up to 0.9" (21.8mm) of precipitation.

How much does it snow in Great Falls in October?

In Great Falls, during October, snow falls for 3.1 days and regularly aggregates up to 4.1" (104.1mm) of snow.

How many hours of daylight does Great Falls have in October?

In October, the average length of the day is 10.8h.

How long on average sun shines in October in Great Falls?

The average sunshine in October is 6.5h.

How high is the UV index in October in Great Falls?

The average daily maximum UV index in October is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV rays.
Average temperature in October - Great Falls, MT
  • Average high temperature in October: 57.7°F

The warmest month (with the highest average high temperature) is July (83.4°F).
The month with the lowest average high temperature is December (34.6°F).

  • Average low temperature in October: 32.8°F

The month with the highest average low temperature is July (51.4°F).
Coldest months (with the lowest average low temperature) are January and December (14.9°F).

Average rainfall in October - Great Falls, MT
  • Average rainfall in October: 0.9"

The wettest month (with the highest rainfall) is June (2.5").
Driest months (with the lowest rainfall) are January and February (0.5").

Average rainfall days in October - Great Falls, MT
  • Average rainfall days in October: 6.6 days

Months with the highest number of rainy days are May and June (11.7 days).
The month with the lowest number of rainy days is October (6.6 days).

Average snowfall in October - Great Falls, MT
  • Average snowfall in October: 4.1"

The month with the highest snowfall is March (11.9").
The month with the lowest snowfall is July (0").

Average snowfall days in October - Great Falls, MT
  • Average snowfall days in October: 3.1 days

The month with the highest number of snowfall days is March (7.8 days).
The month with the lowest number of snowfall days is July (0 days).

Average daylight in October / Average sunshine in October - Great Falls, MT
  • Average daylight in October: 10.8h

The month with the longest days is June (Average daylight: 15.9h).
The month with shortest days is December (Average daylight: 8.5h).

  • Average sunshine in October: 6.5h

The month with most sunshine is July (Average sunshine: 12.2h).
The month with least sunshine is December (Average sunshine: 3.4h).

Average UV index in October - Great Falls, MT
  • Average UV index in October: 3

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).