Spring Weather in Oceanside California, United States

Daily high temperatures increase by 5°F, from 65°F to 70°F, rarely falling below 59°F or exceeding 77°F.

Daily low temperatures increase by 10°F, from 49°F to 59°F, rarely falling below 41°F or exceeding 63°F.

For reference, on August 24, the hottest day of the year, temperatures in Oceanside typically range from 64°F to 76°F, while on December 24, the coldest day of the year, they range from 45°F to 65°F.

The figure below shows you a compact characterization of the hourly average spring temperatures. 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.

Cape Town, Western Cape, South Africa (9,923 miles away) is the far-away foreign place with temperatures most similar to Oceanside (view comparison).

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The spring in Oceanside experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 41% to 20%.

The clearest day of the spring is May 31, with clear, mostly clear, or partly cloudy conditions 80% of the time.

For reference, on February 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 42%, while on September 6, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 91%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Oceanside, the chance of a wet day over the course of the spring is very rapidly decreasing, starting the season at 19% and ending it at 1%.

For reference, the year's highest daily chance of a wet day is 21% on February 21, and its lowest chance is 1% on June 25.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the spring in Oceanside is very rapidly decreasing, starting the season at 2.6 inches, when it rarely exceeds 5.4 inches or falls below 0.2 inches, and ending the season at 0.1 inches, when it rarely exceeds 0.4 inches or falls below -0.0 inches.

Over the course of the spring in Oceanside, the length of the day is very rapidly increasing. From the start to the end of the season, the length of the day increases by 2 hours, 42 minutes, implying an average daily increase of 1 minute, 47 seconds, and weekly increase of 12 minutes, 27 seconds.

The shortest day of the spring is March 1, with 11 hours, 30 minutes of daylight and the longest day is May 31, with 14 hours, 12 minutes of daylight.

The latest sunrise of the spring in Oceanside is 7:05 AM on March 10 and the earliest sunrise is 1 hour, 24 minutes earlier at 5:41 AM on May 31.

The earliest sunset is 5:47 PM on March 1 and the latest sunset is 2 hours, 6 minutes later at 7:53 PM on May 31.

Daylight saving time (DST) starts at 3:00 AM on March 10, 2024, shifting sunrise and sunset to be an hour later.

For reference, on June 20, the longest day of the year, the Sun rises at 5:40 AM and sets 14 hours, 21 minutes later, at 8:01 PM, while on December 21, the shortest day of the year, it rises at 6:49 AM and sets 9 hours, 57 minutes later, at 4:46 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the spring of 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Oceanside is essentially constant during the spring, remaining around 0% throughout.

For reference, on August 21, the muggiest day of the year, there are muggy conditions 24% of the time, while on January 9, the least muggy day of the year, there are muggy conditions 0% of the time.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Oceanside is gradually decreasing during the spring, decreasing from 7.0 miles per hour to 6.3 miles per hour over the course of the season.

For reference, on February 19, the windiest day of the year, the daily average wind speed is 7.2 miles per hour, while on August 14, the calmest day of the year, the daily average wind speed is 5.3 miles per hour.

The highest daily average wind speed during the spring is 7.2 miles per hour on April 10.

The hourly average wind direction in Oceanside throughout the spring is predominantly from the west, with a peak proportion of 78% on May 23.

Oceanside 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 Oceanside is increasing during the spring, rising by 5°F, from 59°F to 64°F, over the course of the season.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in Oceanside are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Oceanside are very rapidly increasing during the spring, increasing by 918°F, from 366°F to 1,284°F, over the course of the season.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Oceanside is very rapidly increasing during the spring, rising by 3.2 kWh, from 4.9 kWh to 8.1 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Oceanside are 33.196 deg latitude, -117.379 deg longitude, and 66 ft elevation.

The topography within 2 miles of Oceanside contains only modest variations in elevation, with a maximum elevation change of 240 feet and an average elevation above sea level of 54 feet. Within 10 miles contains only modest variations in elevation (1,060 feet). Within 50 miles contains very significant variations in elevation (6,736 feet).

The area within 2 miles of Oceanside is covered by artificial surfaces (66%) and water (33%), within 10 miles by water (46%) and artificial surfaces (29%), and within 50 miles by water (43%) and shrubs (33%).