Helena
Montana, USA
Long-term weather forecast
Long-term weather forecast

October weather forecast and climate
Helena, MT

The State Capital building of Montana in Helena city, set on a beautiful natural park
The State Capital building of Montana in Helena city, set on a beautiful natural park
October, like September, is another mild autumn month in Helena, Montana, with average temperature varying between 32.5°F (0.3°C) and 58.6°F (14.8°C).

Temperature

In Helena, the average high-temperature in October decreases, from an agreeable 72.7°F (22.6°C) in September, to a mild 58.6°F (14.8°C). In Helena, the average low-temperature is 32.5°F (0.3°C).

Humidity

In October, the average relative humidity in Helena is 58.3%.

Rainfall

In October, the rain falls for 6.2 days. Throughout October, 0.7" (17.3mm) of precipitation is accumulated. In Helena, during the entire year, the rain falls for 91.6 days and collects up to 11.2" (284.9mm) of precipitation.

Snowfall

January through May, August through December are months with snowfall.

Daylight

The average length of the day in Helena is 10.9h.

Sunshine

In October, the average sunshine in Helena is 6.5h.

UV index

In October, the average daily maximum UV index in Helena is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV rays for the average person.
The daily maximum UV index of 3 in October interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 Helena?

In Helena, Montana, in October, the average high-temperature is 58.6°F (14.8°C), and the average low-temperature is 32.5°F (0.3°C).

What is the average humidity in October in Helena?

The average relative humidity in October in Helena is 58.3%.

How many days does it rain in October in Helena?

In Helena, Montana, in October, during 6.2 rainfall days, 0.7" (17.3mm) of precipitation is typically accumulated.

How many days does it snow in October in Helena?

In Helena, Montana, in October, during 1.8 snowfall days, 2.4" (61mm) of snow is typically accumulated.

How many hours of daylight does Helena have in October?

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

How long on average sun shines in October in Helena?

In October, the average sunshine is 6.5h.

How high is the UV index in October in Helena?

In October, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in October - Helena, MT
  • Average high temperature in October: 58.7°F

The warmest month (with the highest average high temperature) is July (85.7°F).
The month with the lowest average high temperature is December (31.7°F).

  • Average low temperature in October: 32.5°F

The month with the highest average low temperature is July (54.3°F).
The coldest month (with the lowest average low temperature) is December (11.9°F).

Average humidity in October - Helena, MT
  • Average humidity in October: 58.3%

The month with the highest relative humidity is December (68.1%).
The month with the lowest relative humidity is July (46.4%).

Average rainfall in October - Helena, MT
  • Average rainfall in October: 0.7"

The wettest month (with the highest rainfall) is June (2.1").
The driest month (with the lowest rainfall) is February (0.3").

Average rainfall days in October - Helena, MT
  • Average rainfall days in October: 6.2 days

The month with the highest number of rainy days is June (11.2 days).
The month with the lowest number of rainy days is February (5.9 days).

Average snowfall in October - Helena, MT
  • Average snowfall in October: 2.4"

The month with the highest snowfall is December (7.3").
Months with the lowest snowfall are June and July (0").

Average snowfall days in October - Helena, MT
  • Average snowfall days in October: 1.8 days

The month with the highest number of snowfall days is December (6 days).
The month with the lowest number of snowfall days is July (0 days).

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

The month with the longest days is June (Average daylight: 15.8h).
The month with shortest days is December (Average daylight: 8.6h).

  • Average sunshine in October: 6.5h

The month with most sunshine is July (Average sunshine: 11.9h).
The month with least sunshine is December (Average sunshine: 3.2h).

Average UV index in October - Helena, MT
  • Average UV index in October: 3

The month with the highest UV index is July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 1).