October weather forecastBoulder, MT
October
Weather in October
October, like September, in Boulder, Montana, is a cool autumn month, with an average temperature varying between 50.9°F (10.5°C) and 31.3°F (-0.4°C).Temperature
Boulder's transition into October is marked by a clear drop in the average high-temperature, receding from a comfortable 67.5°F (19.7°C) in September to a fresh 50.9°F (10.5°C). Boulder experiences a mean temperature of 31.3°F (-0.4°C) during October nights.Humidity
In October, the average relative humidity in Boulder is 65%.Rainfall
In Boulder, during October, the rain falls for 11 days and regularly aggregates up to 1.06" (27mm) of precipitation. Throughout the year, there are 133.7 rainfall days, and 16.38" (416mm) of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall. In Boulder, during October, snow falls for 6.5 days and regularly aggregates up to 3.94" (100mm) of snow. Throughout the year, there are 105.8 snowfall days, and 55.12" (1400mm) of snow is accumulated.Daylight
In Boulder, the average length of the day in October is 10h and 53min.On the first day of the month, sunrise is at 7:28 am and sunset at 7:07 pm. On the last day of October, in Boulder, sunrise is at 8:09 am and sunset at 6:14 pm MDT.
Sunshine
In October, the average sunshine in Boulder is 7h.UV index
In Boulder, Montana, the average daily maximum UV index in October is 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.Note: In October, a daily maximum UV index of 2 leads to the following instructions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Boulder, MT
- Average high temperature in October: 50.9°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (27°F).
- Average low temperature in October: 31.3°F
The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (12.6°F).
Average pressure in October
Boulder, MT
- Average pressure in October: 30.05"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in October
Boulder, MT
- Average wind speed in October: 6.2mph
The windiest months (with the highest average wind speed) are January and November (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in October
Boulder, MT
- Average humidity in October: 65%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (46%).
Average rainfall in October
Boulder, MT
- Average rainfall in October: 1.06"
The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is December (0.79").
Average rainfall days in October
Boulder, MT
- Average rainfall days in October: 11 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in October
Boulder, MT
- Average snowfall in October: 3.94"
The month with the highest snowfall is February (9.72").
The months with the least snowfall are July and August (0").
Average snowfall days in October
Boulder, MT
- Average snowfall days in October: 6.5 days
The month with the highest number of snowfall days is February (18 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in October /
Average sunshine in October
Boulder, MT
- Average daylight in October: 10h and 54min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in October: 7h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in October
Boulder, MT
- Average sunshine days in October: 15 days
The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is February (8.5 days).
Average UV index in October
Boulder, 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
Boulder, MT
- Average cloud cover in October: 30
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in October
Boulder, MT
- Average visibility in October: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
