October weather forecast
Lewistown, MT

Share

Weather in October

October introduces Lewistown to a full-fledged autumn as temperatures continue to descend from September values. Snowfall shows a significant jump with the city getting blanketed with 4.61" (117mm), staging a winter preview. The shorter daylight hours, along with fewer sunshine hours, cater to the wintry sensation. Simultaneously, a maintained consistency in wind speed contributes to the wintry vibe. The transition phase witnesses an escalating humidity level, adding to the chilly environment.

Temperature

October's arrival is marked by a notable drop in high-temperatures, falling from an enjoyable 67.5°F (19.7°C) in September to a cool 52.2°F (11.2°C). Lewistown in October anticipates an average nighttime temperature of 35.1°F (1.7°C).

Humidity

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

Rainfall

In Lewistown, Montana, in October, it is raining for 9.5 days, with typically 1.22" (31mm) of accumulated precipitation. Throughout the year, there are 126.2 rainfall days, and 17.83" (453mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Lewistown are January through June, September through December. In Lewistown, Montana, during October, snow falls for 6.1 days and regularly aggregates up to 4.61" (117mm) of snow. In Lewistown, during the entire year, snow falls for 83.4 days and aggregates up to 45.51" (1156mm) of snow.

Daylight

The average length of the day in October is 10h and 52min.
On the first day of October in Lewistown, sunrise is at 7:17 am and sunset at 6:56 pm. On the last day of the month, sunrise is at 8:00 am and sunset at 6:02 pm MDT.

Sunshine

In October, the average sunshine is 6.5h.

UV index

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Lewistown. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: An average UV index of 2 in October transforms into this advice:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
[Resources]

Frequently asked questions

What is the temperature in October in Lewistown?

In October, the average high-temperature and low-temperature in Lewistown are 52.2°F (11.2°C) and 35.1°F (1.7°C) respectively.

What is the average humidity in October in Lewistown?

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

How much does it rain in Lewistown in October?

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

How many days does it snow in October in Lewistown?

In Lewistown, Montana, in October, during 6.1 snowfall days, 4.61" (117mm) of snow is typically accumulated.

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

In October, the average day length is 10h and 52min.

When is the sunrise / sunset in October in Lewistown?

On the first day of October, sunrise is at 7:17 am and sunset at 6:56 pm. On the last day of the month, sunrise is at 8:00 am and sunset at 6:02 pm MDT.

How many hours of sunshine does Lewistown have in October?

The average sunshine duration in October is 6.5h.

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

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

How high is the UV index in October in Lewistown?

In October, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
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
Lewistown, MT

Average temperature in October - Lewistown, 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).

[Resources]

Average pressure in October
Lewistown, MT

Average pressure in October - Lewistown, 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).

[Resources]

Average wind speed in October
Lewistown, MT

Average wind speed in October - Lewistown, 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).

[Resources]

Average humidity in October
Lewistown, MT

Average humidity in October - Lewistown, 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%).

[Resources]

Average rainfall in October
Lewistown, MT

Average rainfall in October - Lewistown, 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").

[Resources]

Average rainfall days in October
Lewistown, MT

Average rainfall days in October - Lewistown, 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).

[Resources]

Average snowfall in October
Lewistown, MT

Average snowfall in October - Lewistown, 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").

[Resources]

Average snowfall days in October
Lewistown, MT

Average snowfall days in October - Lewistown, 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).

[Resources]

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

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

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • 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).

[Resources]

Average sunshine days in October
Lewistown, MT

Average sunshine days in October - Lewistown, 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).

[Resources]

Average UV index in October
Lewistown, MT

Average UV index in October - Lewistown, 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).

[Resources]

Average cloud cover in October
Lewistown, MT

Average cloud cover in October - Lewistown, 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).

[Resources]

Average visibility in October
Lewistown, MT

Average visibility in October - Lewistown, 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).

[Resources]

Lewistown, Montana, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location