October weather forecastCastle Rock, CO
October
Weather in October
October in Castle Rock is the quintessential autumn month with a further drop in temperatures. Returning snowfall, with about 4.65" (118mm) recorded, hints at the upcoming winter. The crisp air and vibrant fall colors make walks around town exceptionally scenic and enjoyable. As the daylight hours shorten, the city begins to adapt to the cooler evenings. This month is often marked by a delightful mix of sunny days and cool fall evenings, offering a unique charm to the weather of Castle Rock.Temperature
With the onset of October, Castle Rock's average high-temperature witnesses a clear drop, receding from September's warm 75.6°F (24.2°C) to a mild 60.4°F (15.8°C). In October, Castle Rock endures a notable temperature shift from day to night, with lows averaging at an icy 37.8°F (3.2°C).Humidity
In Castle Rock, the average relative humidity in October is 49%.Rainfall
In Castle Rock, Colorado, during October, the rain falls for 5.2 days and regularly aggregates up to 0.87" (22mm) of precipitation. Throughout the year, in Castle Rock, Colorado, there are 107.3 rainfall days, and 13.7" (348mm) of precipitation is accumulated.Snowfall
Months with snowfall in Castle Rock are January through June, October through December. October is the first month it typically snows. Throughout October, in the average 2.9 snowfall days, it receives 4.65" (118mm) of snow. Throughout the year, there are 51 snowfall days, and 40.43" (1027mm) of snow is accumulated.Daylight
The average length of the day in October in Castle Rock, Colorado, is 11h and 9min.On the first day of October, sunrise is at 6:56 am and sunset at 6:41 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 5:58 pm MDT.
Sunshine
The average sunshine in October is 7.5h.UV index
The months with the lowest UV index in Castle Rock are January, February, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 during October translates into the following directions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Castle Rock, CO
- Average high temperature in October: 60.4°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is December (39.6°F).
- Average low temperature in October: 37.8°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is December (20.1°F).
Average pressure in October
Castle Rock, CO
- Average pressure in October: 30.03"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).
Average wind speed in October
Castle Rock, CO
- Average wind speed in October: 7mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest months (with the lowest average wind speed) are July, August and September (6.5mph).
Average humidity in October
Castle Rock, CO
- Average humidity in October: 49%
The month with the highest relative humidity is February (66%).
The months with the lowest relative humidity are June and September (45%).
Average rainfall in October
Castle Rock, CO
- Average rainfall in October: 0.87"
The wettest month (with the highest rainfall) is May (2.24").
The driest months (with the least rainfall) are January and December (0.55").
Average rainfall days in October
Castle Rock, CO
- Average rainfall days in October: 5.2 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is November (3 days).
Average snowfall in October
Castle Rock, CO
- Average snowfall in October: 4.65"
The month with the highest snowfall is April (7.13").
The months with the least snowfall are July, August and September (0").
Average snowfall days in October
Castle Rock, CO
- Average snowfall days in October: 2.9 days
The month with the highest number of snowfall days is February (9.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in October /
Average sunshine in October
Castle Rock, CO
- Average daylight in October: 11h and 6min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in October: 7h and 30min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 48min).
Average sunshine days in October
Castle Rock, CO
- Average sunshine days in October: 20.7 days
The month with the most sunshine days is November (22.8 days).
The month with the least sunshine days is July (10.6 days).
Average UV index in October
Castle Rock, CO
- Average UV index in October: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in October
Castle Rock, CO
- Average cloud cover in October: 17
The month with the most cloud cover is April (Cloud cover 27).
The month with the least cloud cover is September (Cloud cover 15).
Average visibility in October
Castle Rock, 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).
