1. WeatherSpark.com
  2. United States
  3. California
  4. East Foothills
  5. March

Average Weather in March in East Foothills California, United States

In East Foothills, the month of March is characterized by gradually rising daily high temperatures, with daily highs increasing by 4°F, from 64°F to 68°F over the course of the month, and rarely exceeding 78°F or dropping below 56°F.

Daily low temperatures are around 47°F, rarely falling below 39°F or exceeding 53°F.

For reference, on July 28, the hottest day of the year, temperatures in East Foothills typically range from 59°F to 84°F, while on December 31, the coldest day of the year, they range from 41°F to 57°F.

Average High and Low Temperature in March

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

Average Hourly Temperature in March in East Foothills12 AM4 AM8 AM12 PM4 PM8 PM12 AM181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131FebAprchillycoldcoolcomfortable
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

The month of March in East Foothills experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 54% to 47%.

The clearest day of the month is March 31, with clear, mostly clear, or partly cloudy conditions 53% of the time.

For reference, on January 13, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 56%, while on July 29, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 92%.

Cloud Cover in March

The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In East Foothills, the chance of a wet day over the course of March is very rapidly decreasing, starting the month at 29% and ending it at 19%.

For reference, the year's highest daily chance of a wet day is 30% on February 20, and its lowest chance is -0% on July 22.

Probability of Precipitation in March

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

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

The average sliding 31-day rainfall during March in East Foothills is rapidly decreasing, starting the month at 3.6 inches, when it rarely exceeds 7.0 inches or falls below 0.7 inches, and ending the month at 2.0 inches, when it rarely exceeds 4.8 inches or falls below 0.2 inches.

Average Monthly Rainfall in March

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

Over the course of March in East Foothills, 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, 12 minutes, implying an average daily increase of 2 minutes, 24 seconds, and weekly increase of 16 minutes, 50 seconds.

The shortest day of the month is March 1, with 11 hours, 24 minutes of daylight and the longest day is March 31, with 12 hours, 36 minutes of daylight.

Hours of Daylight and Twilight in March

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in East Foothills is 6:23 AM on March 11 and the latest sunrise is 59 minutes later at 7:22 AM on March 12.

The earliest sunset is 6:01 PM on March 1 and the latest sunset is 1 hour, 28 minutes later at 7:29 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 5:46 AM and sets 14 hours, 45 minutes later, at 8:31 PM, while on December 21, the shortest day of the year, it rises at 7:18 AM and sets 9 hours, 35 minutes later, at 4:53 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in March

The solar day over the course of March. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

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 East Foothills is essentially constant during March, remaining around 0% throughout.

For reference, on September 9, 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

Humidity Comfort Levels in March in East Foothills0%10%20%30%40%50%60%70%80%90%100%181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131FebAprMar 10%Mar 10%Mar 310%Mar 310%Mar 110%Mar 110%Mar 210%Mar 210%comfortablecomfortabledrydryhumidhumid
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 East Foothills is essentially constant during March, remaining within 0.1 miles per hour of 3.7 miles per hour throughout.

For reference, on June 6, the windiest day of the year, the daily average wind speed is 4.6 miles per hour, while on October 21, the calmest day of the year, the daily average wind speed is 3.2 miles per hour.

Average Wind Speed in March

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction in East Foothills throughout March is predominantly from the west, with a peak proportion of 62% on March 31.

Wind Direction in March

Wind Direction in March in East FoothillsNW0%20%40%60%80%100%181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131FebAprwestsoutheastnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

East Foothills 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 East Foothills is essentially constant during March, remaining around 54°F throughout.

The highest average surface water temperature during March is 54°F on March 13.

Average Water Temperature in March

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 East Foothills is rapidly increasing during March, rising by 1.7 kWh, from 3.9 kWh to 5.6 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in March

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of East Foothills are 37.381 deg latitude, -121.817 deg longitude, and 331 ft elevation.

The topography within 2 miles of East Foothills contains very significant variations in elevation, with a maximum elevation change of 1,788 feet and an average elevation above sea level of 530 feet. Within 10 miles contains very significant variations in elevation (4,163 feet). Within 50 miles also contains extreme variations in elevation (4,318 feet).

The area within 2 miles of East Foothills is covered by artificial surfaces (55%) and grassland (31%), within 10 miles by artificial surfaces (43%) and grassland (34%), and within 50 miles by grassland (23%) and water (23%).

Data Sources

This report illustrates the typical weather in East Foothills 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 East Foothills.

For each station, the records are corrected for the elevation difference between that station and East Foothills 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 East Foothills is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between East Foothills and a given station.

The stations contributing to this reconstruction are: Norman Y. Mineta San José International Airport (77%, 10 kilometers, west); Livermore Municipal Airport (18%, 35 kilometers, north); and Modesto City-County Airport (4.9%, 81 kilometers, east).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.