April weather forecastThornton, CA
April
Weather in April
April is an agreeable spring month in Thornton, California, with an average temperature fluctuating between 69.8°F (21°C) and 46.2°F (7.9°C).Temperature
In Thornton, the average high-temperature in April slightly rises, from a comfortable 63.5°F (17.5°C) in March, to an agreeable 69.8°F (21°C). Marked by a significant drop from the daytime highs, Thornton's average low-temperature in April stands at a frosty 46.2°F (7.9°C).Humidity
The average relative humidity in April is 68%.Rainfall
In Thornton, in April, during 7.8 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Thornton, during the entire year, the rain falls for 63.8 days and collects up to 12.6" (320mm) of precipitation.Snowfall
In Thornton, snow does not fall in January through November.Daylight
The average length of the day in April is 13h and 13min.On the first day of April, sunrise is at 6:49 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:09 am and sunset at 7:56 pm PDT.
Sunshine
The average sunshine in April is 10.2h.UV index
In Thornton, the average daily maximum UV index in April is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 5 in April interprets into the following advice:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Thornton, CA
- Average high temperature in April: 69.8°F
The warmest month (with the highest average high temperature) is July (93.9°F).
The month with the lowest average high temperature is December (55°F).
- Average low temperature in April: 46.2°F
The month with the highest average low temperature is August (58.8°F).
The coldest month (with the lowest average low temperature) is December (41°F).
Average pressure in April
Thornton, CA
- Average pressure in April: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Thornton, CA
- Average wind speed in April: 5.5mph
The windiest months (with the highest average wind speed) are February and June (5.8mph).
The calmest month (with the lowest average wind speed) is November (4.4mph).
Average humidity in April
Thornton, CA
- Average humidity in April: 68%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (45%).
Average rainfall in April
Thornton, CA
- Average rainfall in April: 0.98"
The wettest month (with the highest rainfall) is February (2.4").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in April
Thornton, CA
- Average rainfall days in April: 7.8 days
The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is June (0.9 days).
Average snowfall days in April
Thornton, CA
- Average snowfall days in April: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in April /
Average sunshine in April
Thornton, CA
- Average daylight in April: 13h and 12min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in April: 10h and 12min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in April
Thornton, CA
- Average sunshine days in April: 21.7 days
The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is March (17.8 days).
Average UV index in April
Thornton, CA
- Average UV index in April: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in April
Thornton, CA
- Average cloud cover in April: 27
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in April
Thornton, CA
- 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).
