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
A notable decrease in the average high-temperature is observed during October, falling from a pleasant 72.3°F (22.4°C) in September to a mild 57.2°F (14°C). Boulder logs a notable disparity from the daily highs during October, as the nighttime temperature lowers to an average of 35.2°F (1.8°C).Humidity
In Boulder, the average relative humidity in October is 51%.Rainfall
In Boulder, during October, the rain falls for 7 days and regularly aggregates up to 0.91" (23mm) of precipitation. In Boulder, Colorado, during the entire year, the rain falls for 117.3 days and collects up to 14.17" (360mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. October is the first month it typically snows. Throughout October, in the average 2.6 snowfall days, it receives 4.09" (104mm) of snow. Throughout the year, there are 44.8 snowfall days, and 37.01" (940mm) of snow is accumulated.Daylight
In Boulder, the average length of the day in October is 11h and 8min.On the first day of the month, sunrise is at 6:58 am and sunset at 6:42 pm. On the last day of October, sunrise is at 7:29 am and sunset at 5:59 pm MDT.
Sunshine
The average sunshine in October is 7.3h.UV index
In Boulder, the average daily maximum UV index in October is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In October, a daily UV index of 3 turns into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Boulder in October?
What is the average humidity in October in Boulder?
How many days does it rain in October?
When does it start snowing in Boulder?
What is the average length of the day in October in Boulder?
When is the sunrise / sunset in October?
How long on average sun shines in October?
What is the UV index reading in October?
Average temperature in October
Boulder, CO
- Average high temperature in October: 57.2°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is December (35.2°F).
- Average low temperature in October: 35.2°F
The month with the highest average low temperature is July (55.2°F).
The coldest month (with the lowest average low temperature) is February (18°F).
Average pressure in October
Boulder, CO
- Average pressure in October: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are April, May and June (29.92"Hg).
Average wind speed in October
Boulder, CO
- Average wind speed in October: 6.2mph
The windiest month (with the highest average wind speed) is January (7.3mph).
The calmest months (with the lowest average wind speed) are May, July, August and September (5.7mph).
Average humidity in October
Boulder, CO
- Average humidity in October: 51%
The month with the highest relative humidity is February (70%).
The months with the lowest relative humidity are June, August and September (45%).
Average rainfall in October
Boulder, CO
- Average rainfall in October: 0.91"
The wettest month (with the highest rainfall) is May (2.48").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in October
Boulder, CO
- Average rainfall days in October: 7 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (3.3 days).
Average snowfall in October
Boulder, CO
- Average snowfall in October: 4.09"
The month with the highest snowfall is April (7.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
Boulder, CO
- Average snowfall days in October: 2.6 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in October /
Average sunshine in October
Boulder, CO
- Average daylight in October: 11h and 1min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in October: 7h and 2min
The months with the most sunshine are June and July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days in October
Boulder, CO
- Average sunshine days in October: 20.2 days
The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is July (9.9 days).
Average UV index in October
Boulder, CO
- Average UV index in October: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in October
Boulder, CO
- Average cloud cover in October: 19
The months with the most cloud cover are April and May (Cloud cover 28).
The month with the least cloud cover is September (Cloud cover 16).
Average visibility in October
Boulder, CO
- Average visibility in October: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Boulder, Colorado, USA
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