April weather forecastWestmont, CA
April
Weather in April
April is an agreeable spring month in Westmont, California, with an average temperature varying between 68.9°F (20.5°C) and 54.5°F (12.5°C).Temperature
The transition into April reveals an average high-temperature of an agreeable 68.9°F (20.5°C), mirroring a close resemblance to March. During April, the average low-temperature is a fresh 54.5°F (12.5°C).Humidity
In April, the average relative humidity is 62%.Rainfall
In Westmont, during April, the rain falls for 4.5 days and regularly aggregates up to 0.39" (10mm) of precipitation. In Westmont, during the entire year, the rain falls for 47.6 days and collects up to 7.24" (184mm) of precipitation.Daylight
In April, the average length of the day in Westmont is 13h and 4min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:14 pm. On the last day of April, sunrise is at 6:04 am and sunset at 7:36 pm PDT.
Sunshine
In Westmont, the average sunshine in April is 10.9h.UV index
In April, the average daily maximum UV index in Westmont is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The daily maximum UV index of 5 in April interprets into the following advice:
Heed the precautions - Suggestions to avoid sunburn are made. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Westmont, CA
- Average high temperature in April: 68.9°F
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (64°F).
- Average low temperature in April: 54.5°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (51.1°F).
Average pressure in April
Westmont, CA
- Average pressure in April: 29.98"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in April
Westmont, CA
- Average wind speed in April: 6.4mph
The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is September (4.9mph).
Average humidity in April
Westmont, CA
- Average humidity in April: 62%
The month with the highest relative humidity is June (70%).
The month with the lowest relative humidity is November (54%).
Average rainfall in April
Westmont, CA
- Average rainfall in April: 0.39"
The wettest month (with the highest rainfall) is January (1.42").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in April
Westmont, CA
- Average rainfall days in April: 4.5 days
The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.7 days).
Average daylight in April /
Average sunshine in April
Westmont, CA
- Average daylight in April: 13h and 6min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in April: 10h and 54min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in April
Westmont, CA
- Average sunshine days in April: 24.1 days
The month with the most sunshine days is October (25.5 days).
The month with the least sunshine days is June (21.4 days).
Average UV index in April
Westmont, CA
- Average UV index in April: 5
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in April
Westmont, CA
- Average cloud cover in April: 19
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in April
Westmont, 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).
