April weather forecastCastle Rock, CO
April
Weather in April
Spring is in full swing in Castle Rock during the month of April. Sunshine increases, and the temperatures peak at 56.8°F (13.8°C), a marked difference from the previous month. Despite the warmer temperatures, residents and visitors can still experience some remaining chill, especially during the early morning and late evening hours. The increased daylight hours rejuvenating the natural scenery of the city. It's a month full of vibrancy, marking the perfect transition from the cold winter to the warmer summer months.Temperature
The shift into April is characterized by a subtle rise in the average high-temperature, transitioning from March's cool 50.7°F (10.4°C) to a refreshing 56.8°F (13.8°C). Nightfall in April introduces a considerable dip in temperature in Castle Rock, settling at an average of 33.3°F (0.7°C).Humidity
The average relative humidity in April is 53%.Rainfall
In April, in Castle Rock, the rain falls for 11.9 days. Throughout April, 1.57" (40mm) of precipitation is accumulated. In Castle Rock, Colorado, during the entire year, the rain falls for 107.3 days and collects up to 13.7" (348mm) of precipitation.Snowfall
Months with snowfall are January through June, October through December. The month with the most snowfall is April, when snow falls for 6.8 days and typically aggregates up to 7.13" (181mm) of snow.Daylight
In April, the average length of the day is 13h and 16min.On the first day of April in Castle Rock, sunrise is at 6:42 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 7:52 pm MDT.
Sunshine
In Castle Rock, Colorado, the average sunshine in April is 10.6h.UV index
In April, the average daily maximum UV index in Castle Rock, Colorado, is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: A daily maximum UV index of 3 in April translates into the following instructions:
Take necessary precautions - Defending against sun damage is advocated. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Castle Rock, CO
- Average high temperature in April: 56.8°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 April: 33.3°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 April
Castle Rock, CO
- Average pressure in April: 29.91"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 April
Castle Rock, CO
- Average wind speed in April: 7.9mph
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 April
Castle Rock, CO
- Average humidity in April: 53%
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 April
Castle Rock, CO
- Average rainfall in April: 1.57"
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 April
Castle Rock, CO
- Average rainfall days in April: 11.9 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 April
Castle Rock, CO
- Average snowfall in April: 7.13"
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 April
Castle Rock, CO
- Average snowfall days in April: 6.8 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 April /
Average sunshine in April
Castle Rock, CO
- Average daylight in April: 13h and 18min
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 April: 10h and 36min
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 April
Castle Rock, CO
- Average sunshine days in April: 12.1 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 April
Castle Rock, CO
- Average UV index in April: 3
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 April
Castle Rock, CO
- Average cloud cover in April: 27
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 April
Castle Rock, CO
- Average visibility in April: 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).
