April weather forecastSan Marcos, CA
April
Weather in April
April in San Marcos, California, is a pleasant spring month, with temperature in the range of an average low of 51.3°F (10.7°C) and an average high of 68.5°F (20.3°C).Temperature
During April, San Marcos observes a subtle ascent to a pleasant 68.5°F (20.3°C) from March's 65.8°F (18.8°C) in the average high-temperature. San Marcos observes an average low-temperature of 51.3°F (10.7°C) during April nights.Humidity
The average relative humidity in April in San Marcos is 66%.Rainfall
In San Marcos, in April, it is raining for 6.3 days, with typically 0.59" (15mm) of accumulated precipitation. In San Marcos, during the entire year, the rain falls for 52.1 days and collects up to 6.1" (155mm) of precipitation.Daylight
In April, the average length of the day in San Marcos is 13h and 2min.On the first day of the month, sunrise is at 6:35 am and sunset at 7:09 pm. On the last day of April, in San Marcos, California, sunrise is at 6:00 am and sunset at 7:30 pm PDT.
Sunshine
The average sunshine in April is 11h.UV index
The average daily maximum UV index in April is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 5 in April translates into this advice:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
San Marcos, CA
- Average high temperature in April: 68.5°F
The warmest month (with the highest average high temperature) is August (81.9°F).
The months with the lowest average high temperature are February and December (63.3°F).
- Average low temperature in April: 51.3°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is February (48°F).
Average pressure in April
San Marcos, CA
- Average pressure in April: 29.95"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in April
San Marcos, CA
- Average wind speed in April: 5.7mph
The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is October (4.4mph).
Average humidity in April
San Marcos, CA
- Average humidity in April: 66%
The month with the highest relative humidity is May (70%).
The month with the lowest relative humidity is November (56%).
Average rainfall in April
San Marcos, CA
- Average rainfall in April: 0.59"
The wettest month (with the highest rainfall) is December (1.22").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in April
San Marcos, CA
- Average rainfall days in April: 6.3 days
The month with the highest number of rainy days is March (7.8 days).
The month with the least rainy days is June (1.2 days).
Average daylight in April /
Average sunshine in April
San Marcos, CA
- Average daylight in April: 13h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in April: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in April
San Marcos, CA
- Average sunshine days in April: 21.8 days
The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is February (20 days).
Average UV index in April
San Marcos, 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, March, November and December (UV index 4).
Average cloud cover in April
San Marcos, CA
- Average cloud cover in April: 20
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility in April
San Marcos, 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).
