October weather forecast
Tattnall, MT

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Weather in October

October, like September, in Tattnall, Montana, is another fresh autumn month, with an average temperature varying between 54.3°F (12.4°C) and 39.4°F (4.1°C).

Temperature

The onset of October witnesses a clear shift in the average high-temperature, dropping from a pleasant 71.1°F (21.7°C) in September to a cool 54.3°F (12.4°C). Tattnall observes an average nighttime low-temperature of 39.4°F (4.1°C) during the month of October.

Humidity

In Tattnall, the average relative humidity in October is 58%.

Rainfall

In Tattnall, during October, the rain falls for 7.3 days and regularly aggregates up to 0.71" (18mm) of precipitation. Throughout the year, there are 91.8 rainfall days, and 10.63" (270mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. October is the first month it typically snows. Throughout October, in the average 2 snowfall days, it receives 1.14" (29mm) of snow. Throughout the year, there are 56.9 snowfall days, and 17.95" (456mm) of snow is accumulated.

Daylight

In Tattnall, the average length of the day in October is 10h and 47min.
On the first day of October, sunrise is at 7:10 am and sunset at 6:48 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 5:51 pm MDT.

Sunshine

In October, the average sunshine is 6.3h.

UV index

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 2 in October interprets into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Updated: Aug 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average October temperature?

In Tattnall, in October, the average high-temperature is 54.3°F (12.4°C), and the average low-temperature is 39.4°F (4.1°C). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 82.4°F (28°C).

What is the average humidity in October?

In Tattnall, the average relative humidity in October is 58%.

How much does it rain in Tattnall in October?

In October, the rain falls for 7.3 days. Throughout October, 0.71" (18mm) of precipitation is accumulated.

When does it start snowing?

October is the first month it typically snows. Throughout October, in the average 2 snowfall days, it receives 1.14" (29mm) of snow.

How many hours of daylight does Tattnall have in October?

In October, the average day length is 10h and 47min.

When are sunrise and sunset in October?

On the first day of October, sunrise is at 7:10 am and sunset at 6:48 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 5:51 pm MDT.

How long on average sun shines in October?

The average sunshine duration in October is 6.3h.

When is the lowest UV index?

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

What is the UV index reading in October?

The average daily maximum UV index in October is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to 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
Tattnall, MT

Average temperature in October - Tattnall, MT
  • Average high temperature in October: 54.3°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is February (24.4°F).

  • Average low temperature in October: 39.4°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is February (10°F).

Average pressure in October
Tattnall, MT

Average pressure in October - Tattnall, MT
  • Average pressure in October: 29.97"Hg

The month with the highest atmospheric pressure is February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

Average wind speed in October
Tattnall, MT

Average wind speed in October - Tattnall, MT
  • Average wind speed in October: 10.7mph

The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is February (8.3mph).

Average humidity in October
Tattnall, MT

Average humidity in October - Tattnall, MT
  • Average humidity in October: 58%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (41%).

Average rainfall in October
Tattnall, MT

Average rainfall in October - Tattnall, MT
  • Average rainfall in October: 0.71"

The wettest month (with the highest rainfall) is May (1.73").
The driest month (with the least rainfall) is February (0.43").

Average rainfall days in October
Tattnall, MT

Average rainfall days in October - Tattnall, MT
  • Average rainfall days in October: 7.3 days

The month with the highest number of rainy days is May (12.7 days).
The month with the least rainy days is February (3.3 days).

Average snowfall in October
Tattnall, MT

Average snowfall in October - Tattnall, MT
  • Average snowfall in October: 1.14"

The month with the highest snowfall is December (3.43").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in October
Tattnall, MT

Average snowfall days in October - Tattnall, MT
  • Average snowfall days in October: 2 days

The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July and August (0 days).

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

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

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in October: 6h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in October
Tattnall, MT

Average sunshine days in October - Tattnall, MT
  • Average sunshine days in October: 21 days

The month with the most sunshine days is October (21 days).
The month with the least sunshine days is April (15.4 days).

Average UV index in October
Tattnall, MT

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

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

Average cloud cover in October
Tattnall, MT

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

The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 18).

Average visibility in October
Tattnall, MT

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

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

Tattnall, Montana, USA

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