Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
With the onset of October, Helena's average high-temperature experiences a noticeable drop, receding from September's pleasant 68.2°F (20.1°C) to a fresh 51.3°F (10.7°C). During October, Helena observes a consistent average nighttime temperature of 32.7°F (0.4°C).Humidity
The average relative humidity in October is 64%.Rainfall
In October, in Helena, the rain falls for 10 days. Throughout October, 0.83" (21mm) of precipitation is accumulated. In Helena, during the entire year, the rain falls for 123.7 days and collects up to 12.4" (315mm) of precipitation.Snowfall
Months with snowfall in Helena are January through May, September through December. In October, in Helena, it is snowing for 4.6 days. Throughout October, 2.72" (69mm) of snow is accumulated. In Helena, during the entire year, snow falls for 80.4 days and aggregates up to 34.88" (886mm) of snow.Daylight
The average length of the day in October in Helena, Montana, is 10h and 53min.On the first day of the month, sunrise is at 7:27 am and sunset at 7:07 pm. On the last day of October, in Helena, sunrise is at 8:09 am and sunset at 6:13 pm MDT.
Sunshine
In October, the average sunshine in Helena is 7h.UV index
In October, the average daily maximum UV index in Helena is 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: In October, an average UV index of 2 transforms into the following instructions:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Helena in October?
What is the average humidity in October in Helena?
How much does it rain in Helena in October?
How much does it snow in Helena in October?
What is the average length of the day in October in Helena?
When is the sunrise / sunset in October in Helena?
How many hours of sunshine does Helena have in October?
What is the UV index reading in October in Helena?
Average temperature in October
Helena, MT
- Average high temperature in October: 51.3°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is December (27.7°F).
- Average low temperature in October: 32.7°F
The month with the highest average low temperature is July (50.4°F).
The coldest month (with the lowest average low temperature) is December (14.2°F).
Average pressure in October
Helena, MT
- Average pressure in October: 30.04"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in October
Helena, MT
- Average wind speed in October: 6.7mph
The windiest month (with the highest average wind speed) is November (7.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in October
Helena, MT
- Average humidity in October: 64%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (46%).
Average rainfall in October
Helena, MT
- Average rainfall in October: 0.83"
The wettest month (with the highest rainfall) is June (2.01").
The driest months (with the least rainfall) are January and December (0.63").
Average rainfall days in October
Helena, MT
- Average rainfall days in October: 10 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is November (7 days).
Average snowfall in October
Helena, MT
- Average snowfall in October: 2.72"
The month with the highest snowfall is February (6.18").
The months with the least snowfall are June, July and August (0").
Average snowfall days in October
Helena, MT
- Average snowfall days in October: 4.6 days
The month with the highest number of snowfall days is February (16.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in October /
Average sunshine in October
Helena, 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: 7h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in October
Helena, MT
- Average sunshine days in October: 17.2 days
The month with the most sunshine days is July (20.5 days).
The month with the least sunshine days is April (9.8 days).
Average UV index in October
Helena, MT
- Average UV index in October: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in October
Helena, MT
- Average cloud cover in October: 29
The month with the most cloud cover is February (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in October
Helena, MT
- Average visibility in October: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Helena, Montana, USA
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