March weather forecastSan Marcos, CA
March
Weather in March
The first month of the spring, March, is still a comfortable month in San Marcos, California, with temperature in the range of an average high of 65.8°F (18.8°C) and an average low of 49.5°F (9.7°C).Temperature
The arrival of March brings an average high-temperature of a still comfortable 65.8°F (18.8°C), closely following the temperature pattern of February. San Marcos records a steady low-temperature average of 49.5°F (9.7°C) during March.Humidity
The average relative humidity in March in San Marcos is 66%.Rainfall
In San Marcos, California, in March, during 7.8 rainfall days, 0.75" (19mm) of precipitation is typically accumulated. 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 March, the average length of the day in San Marcos, California, is 12h and 0min.On the first day of March, sunrise is at 6:15 am and sunset at 5:46 pm PST. On the last day of the month, sunrise is at 6:36 am and sunset at 7:08 pm PDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from PDT to PST.
Sunshine
In San Marcos, the average sunshine in March is 8.7h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 4 in March translates into this advice:
Exercise prevention - Protecting skin and eyes from harm is required. The solar radiation around mid-day is intense; avoid the Sun and stay safe. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in March
San Marcos, CA
- Average high temperature in March: 65.8°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 March: 49.5°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 March
San Marcos, CA
- Average pressure in March: 30.01"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 March
San Marcos, CA
- Average wind speed in March: 5.2mph
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 March
San Marcos, CA
- Average humidity in March: 66%
The month with the highest relative humidity is May (70%).
The month with the lowest relative humidity is November (56%).
Average rainfall in March
San Marcos, CA
- Average rainfall in March: 0.75"
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 March
San Marcos, CA
- Average rainfall days in March: 7.8 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 March /
Average sunshine in March
San Marcos, CA
- Average daylight in March: 12h 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 March: 8h and 42min
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 March
San Marcos, CA
- Average sunshine days in March: 21.6 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 March
San Marcos, CA
- Average UV index in March: 4
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 March
San Marcos, CA
- Average cloud cover in March: 23
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 March
San Marcos, CA
- Average visibility in March: 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).
