Average Weather in March in San Luis Obispo California, United States
Daily low temperatures are around 45°F, rarely falling below 36°F or exceeding 53°F.
For reference, on August 24, the hottest day of the year, temperatures in San Luis Obispo typically range from 55°F to 78°F, while on December 27, the coldest day of the year, they range from 41°F to 63°F.
Average High and Low Temperature in March
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on March. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature in March
Hacienda La Calera, Chile (5,695 miles away); Campos do Jordão, Brazil (6,341 miles); and Stutterheim, South Africa (10,617 miles) are the far-away foreign places with temperatures most similar to San Luis Obispo (view comparison).
The month of March in San Luis Obispo experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 45% to 37%.
The clearest day of the month is March 31, with clear, mostly clear, or partly cloudy conditions 63% of the time.
For reference, on February 17, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 47%, while on August 24, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 92%.
Cloud Cover Categories in March
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In San Luis Obispo, the chance of a wet day over the course of March is very rapidly decreasing, starting the month at 21% and ending it at 13%.
For reference, the year's highest daily chance of a wet day is 24% on February 20, and its lowest chance is 0% on July 30.
Probability of Precipitation in March
The average sliding 31-day rainfall during March in San Luis Obispo is rapidly decreasing, starting the month at 2.9 inches, when it rarely exceeds 6.1 inches or falls below 0.3 inches, and ending the month at 1.5 inches, when it rarely exceeds 3.9 inches.
Average Monthly Rainfall in March
Over the course of March in San Luis Obispo, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 7 minutes, implying an average daily increase of 2 minutes, 14 seconds, and weekly increase of 15 minutes, 35 seconds.
The shortest day of the month is March 1, with 11 hours, 27 minutes of daylight and the longest day is March 31, with 12 hours, 33 minutes of daylight.
Hours of Daylight and Twilight in March
The earliest sunrise of the month in San Luis Obispo is 6:18 AM on March 11 and the latest sunrise is 59 minutes later at 7:16 AM on March 12.
The earliest sunset is 5:58 PM on March 1 and the latest sunset is 1 hour, 25 minutes later at 7:23 PM on March 31.
Daylight saving time (DST) starts at 3:00 AM on March 12, 2017, shifting sunrise and sunset to be an hour later.
For reference, on June 21, the longest day of the year, the Sun rises at 5:48 AM and sets 14 hours, 32 minutes later, at 8:20 PM, while on December 21, the shortest day of the year, it rises at 7:07 AM and sets 9 hours, 47 minutes later, at 4:54 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in March
The chance that a given day will be muggy in San Luis Obispo is essentially constant during March, remaining around 0% throughout.
For reference, on July 13, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in March
The average hourly wind speed in San Luis Obispo is essentially constant during March, remaining within 0.2 miles per hour of 8.7 miles per hour throughout.
For reference, on May 24, the windiest day of the year, the daily average wind speed is 9.3 miles per hour, while on September 10, the calmest day of the year, the daily average wind speed is 7.0 miles per hour.
Average Wind Speed in March
Wind Direction in March
San Luis Obispo is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in San Luis Obispo is essentially constant during March, remaining around 55°F throughout.
Average Water Temperature in March
The growing season in San Luis Obispo typically lasts for 11 months (329 days), from around January 24 to around December 19, rarely starting after March 4, or ending before November 22.
The month of March in San Luis Obispo is more likely than not fully within the growing season, with the chance that a given day is in the growing season gradually increasing from 88% to 97% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in March
The average accumulated growing degree days in San Luis Obispo are gradually increasing during March, increasing by 169°F, from 273°F to 443°F, over the course of the month.
Growing Degree Days in March
The average daily incident shortwave solar energy in San Luis Obispo is rapidly increasing during March, rising by 1.6 kWh, from 4.5 kWh to 6.1 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in March
For the purposes of this report, the geographical coordinates of San Luis Obispo are 35.283 deg latitude, -120.660 deg longitude, and 354 ft elevation.
The topography within 2 miles of San Luis Obispo contains very significant variations in elevation, with a maximum elevation change of 1,535 feet and an average elevation above sea level of 416 feet. Within 10 miles contains very significant variations in elevation (2,841 feet). Within 50 miles contains large variations in elevation (5,446 feet).
The area within 2 miles of San Luis Obispo is covered by artificial surfaces (60%) and grassland (29%), within 10 miles by grassland (50%) and shrubs (20%), and within 50 miles by grassland (38%) and water (35%).
This report illustrates the typical weather in San Luis Obispo year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in San Luis Obispo.
For each station, the records are corrected for the elevation difference between that station and San Luis Obispo according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at San Luis Obispo is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Luis Obispo and a given station.
The stations contributing to this reconstruction are: San Luis Obispo County Airport (91%, 5.4 kilometers, south); Paso Robles Municipal Airport (6%, 43 kilometers, north); and Point Piedras Blanca (2.9%, 71 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .