Winter Weather at Lincoln Regional Airport California, United States

Daily high temperatures increase by 5°F, from 59°F to 64°F, rarely falling below 47°F or exceeding 72°F. The lowest daily average high temperature is 54°F on January 1.

Daily low temperatures are around 40°F, rarely falling below 29°F or exceeding 51°F. The lowest daily average low temperature is 37°F on January 1.

For reference, on July 19, the hottest day of the year, temperatures at Lincoln Regional Airport typically range from 62°F to 97°F, while on January 1, the coldest day of the year, they range from 37°F to 54°F.

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

Valenzuela, Spain (5,811 miles away) is the far-away foreign place with temperatures most similar to Lincoln Regional Airport (view comparison).

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The winter at Lincoln Regional Airport experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 53% to 57%. The highest chance of overcast or mostly cloudy conditions is 58% on February 7.

The clearest day of the winter is December 8, with clear, mostly clear, or partly cloudy conditions 47% of the time.

For reference, on February 6, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 58%, while on July 20, 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. At Lincoln Regional Airport, the chance of a wet day over the course of the winter is increasing, starting the season at 28% and ending it at 32%.

For reference, the year's highest daily chance of a wet day is 33% on February 20, and its lowest chance is 0% on July 30.

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 winter at Lincoln Regional Airport is increasing, starting the season at 4.1 inches, when it rarely exceeds 7.9 inches or falls below 0.8 inches, and ending the season at 4.7 inches, when it rarely exceeds 9.3 inches or falls below 1.0 inches.

The highest average 31-day accumulation is 4.9 inches on February 17.

Over the course of the winter at Lincoln Regional Airport, the length of the day is rapidly increasing. From the start to the end of the season, the length of the day increases by 1 hour, 39 minutes, implying an average daily increase of 1 minute, 7 seconds, and weekly increase of 7 minutes, 48 seconds.

The shortest day of the winter is December 21, with 9 hours, 26 minutes of daylight and the longest day is February 28, with 11 hours, 18 minutes of daylight.

The latest sunrise of the winter at Lincoln Regional Airport is 7:24 AM on January 5 and the earliest sunrise is 45 minutes earlier at 6:39 AM on February 28.

The earliest sunset is 4:43 PM on December 7 and the latest sunset is 1 hour, 14 minutes later at 5:57 PM on February 28.

Daylight saving time is observed at Lincoln Regional Airport during 2026, but it neither starts nor ends during the winter, so the entire season is in standard time.

For reference, on June 21, the longest day of the year, the Sun rises at 5:40 AM and sets 14 hours, 54 minutes later, at 8:34 PM, while on December 21, the shortest day of the year, it rises at 7:20 AM and sets 9 hours, 26 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 winter of 2026. 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 at Lincoln Regional Airport is essentially constant during the winter, remaining around 0% throughout.

For reference, on May 21, the muggiest day of the year, there are muggy conditions 0% of the time, while on October 31, 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 at Lincoln Regional Airport is essentially constant during the winter, remaining within 0.2 miles per hour of 6.3 miles per hour throughout.

For reference, on February 20, the windiest day of the year, the daily average wind speed is 6.5 miles per hour, while on October 4, 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 winter is 6.5 miles per hour on February 21.

The wind direction at Lincoln Regional Airport during the winter is predominantly out of the south from December 1 to December 8 and from January 31 to February 28 and the east from December 8 to January 31.

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).

The growing season at Lincoln Regional Airport typically lasts for 9.7 months (293 days), from around February 8 to around November 28, rarely starting after March 15, or ending before November 4.

The winter at Lincoln Regional Airport is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season reaching a low of 16% on January 5.

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 at Lincoln Regional Airport are very rapidly decreasing during the winter, decreasing by 4,435°F, from 4,579°F to 144°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 at Lincoln Regional Airport is increasing during the winter, rising by 1.3 kWh, from 2.2 kWh to 3.6 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 2.0 kWh on December 21.

For the purposes of this report, the geographical coordinates of Lincoln Regional Airport are 38.909 deg latitude, -121.346 deg longitude, and 118 ft elevation.

The topography within 2 miles of Lincoln Regional Airport is essentially flat, with a maximum elevation change of 79 feet and an average elevation above sea level of 119 feet. Within 10 miles is essentially flat (1,125 feet). Within 50 miles contains very significant variations in elevation (7,159 feet).

The area within 2 miles of Lincoln Regional Airport is covered by grassland (65%) and cropland (30%), within 10 miles by grassland (49%) and cropland (42%), and within 50 miles by cropland (34%) and grassland (24%).