October weather forecast
Eureka, MT

Weather in October

October, like September, is a frosty autumn month in Eureka, Montana, with average temperature fluctuating between 30.6°F (-0.8°C) and 49.1°F (9.5°C).

Temperature

In Eureka, the average high-temperature in October plummets, from an enjoyable 65.8°F (18.8°C) in September, to a chilly 49.1°F (9.5°C). In October, the average low-temperature is 30.6°F (-0.8°C).

Humidity

In October, the average relative humidity is 77%.

Rainfall

In Eureka, during October, the rain falls for 12.8 days and regularly aggregates up to 1.18" (30mm) of precipitation. Throughout the year, in Eureka, there are 136.3 rainfall days, and 15.35" (390mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Eureka are January through May, September through December. In October, in Eureka, it is snowing for 3.7 days. Throughout October, 1.26" (32mm) of snow is accumulated. In Eureka, during the entire year, snow falls for 110.7 days, and aggregates up to 46.81" (1189mm) of snow.

Daylight

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

Sunshine

The average sunshine in October is 6.4h.

UV index

In Eureka, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 2 in October transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in October in Eureka?

In Eureka, the average relative humidity in October is 77%.

How much does it rain in Eureka in October?

In Eureka, Montana, in October, during 12.8 rainfall days, 1.18" (30mm) of precipitation is typically accumulated.

How many days does it snow in October in Eureka?

In Eureka, in October, during 3.7 snowfall days, 1.26" (32mm) of snow is typically accumulated.

How many hours of daylight does Eureka have in October?

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

How many hours of sunshine does Eureka have in October?

The average sunshine in October is 6.4h.

How high is the UV index in October in Eureka?

In October, the average daily maximum UV index in Eureka, Montana, is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in October
Eureka, MT

Average temperature in October - Eureka, MT
  • Average high temperature in October: 49.1°F

The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is December (25.5°F).

  • Average low temperature in October: 30.6°F

The month with the highest average low temperature is August (45.1°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).

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Average pressure in October
Eureka, MT

Average pressure in October - Eureka, MT
  • Average pressure in October: 30.05"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in October
Eureka, MT

Average wind speed in October - Eureka, MT
  • Average wind speed in October: 3.7mph

The windiest month (with the highest average wind speed) is June (4.4mph).
The calmest month (with the lowest average wind speed) is December (3.4mph).

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Average humidity in October
Eureka, MT

Average humidity in October - Eureka, MT
  • Average humidity in October: 77%

The month with the highest relative humidity is January (95%).
The month with the lowest relative humidity is August (55%).

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Average rainfall in October
Eureka, MT

Average rainfall in October - Eureka, MT
  • Average rainfall in October: 1.18"

The wettest month (with the highest rainfall) is March (1.85").
The driest month (with the least rainfall) is August (0.39").

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Average rainfall days in October
Eureka, MT

Average rainfall days in October - Eureka, MT
  • Average rainfall days in October: 12.8 days

The month with the highest number of rainy days is April (17 days).
The month with the least rainy days is August (6.1 days).

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Average snowfall in October
Eureka, MT

Average snowfall in October - Eureka, MT
  • Average snowfall in October: 1.26"

The month with the highest snowfall is February (10").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in October
Eureka, MT

Average snowfall days in October - Eureka, MT
  • Average snowfall days in October: 3.7 days

The month with the highest number of snowfall days is December (22.1 days).
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
Eureka, MT

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

The month with the longest days is June (Average daylight: 16.1h).
The month with the shortest days is December (Average daylight: 8.3h).

  • Average sunshine in October: 6.4h

The month with the most sunshine is August (Average sunshine: 11.7h).
The month with the least sunshine is January (Average sunshine: 3.1h).

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Average sunshine days in October
Eureka, MT

Average sunshine days in October - Eureka, MT
  • Average sunshine days in October: 14.8 days

The month with the most sunshine days is August (21.6 days).
The month with the least sunshine days is March (6.3 days).

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Average UV index in October
Eureka, MT

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

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 1).

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Average cloud cover in October
Eureka, MT

Average cloud cover in October - Eureka, MT
  • Average cloud cover in October: 41

The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in October
Eureka, MT

Average visibility in October - Eureka, MT
  • Average visibility in October: 5mi

Months with the highest visibility are May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).

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