Average Weather in April in San Ysidro New Mexico, United States
Daily high temperatures increase by 7°F, from 76°F to 83°F, rarely falling below 67°F or exceeding 90°F.
Daily low temperatures increase by 7°F, from 46°F to 54°F, rarely falling below 37°F or exceeding 61°F.
For reference, on June 25, the hottest day of the year, temperatures in San Ysidro typically range from 69°F to 97°F, while on December 31, the coldest day of the year, they range from 32°F to 57°F.
Average High and Low Temperature in April
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. 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 April
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
Caucete, Argentina (5,093 miles away); Shiraz, Iran (7,955 miles); and Muzaffarābād, Pakistan (7,835 miles) are the far-away foreign places with temperatures most similar to San Ysidro (view comparison).
The month of April in San Ysidro experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 27% throughout the month.
The clearest day of the month is April 29, with clear, mostly clear, or partly cloudy conditions 74% of the time.
For reference, on August 4, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 40%, while on June 11, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 80%.
Cloud Cover Categories in April
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In San Ysidro, the chance of a wet day over the course of April is essentially constant, remaining around 4% throughout.
For reference, the year's highest daily chance of a wet day is 30% on August 3, and its lowest chance is 3% on March 18.
Probability of Precipitation in April
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 April in San Ysidro is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.7 inches.
Average Monthly Rainfall in April
Over the course of April in San Ysidro, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 54 minutes, implying an average daily increase of 1 minute, 52 seconds, and weekly increase of 13 minutes, 2 seconds.
The shortest day of the month is April 1, with 12 hours, 33 minutes of daylight and the longest day is April 30, with 13 hours, 27 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in San Ysidro is 6:54 AM on April 1 and the earliest sunrise is 34 minutes earlier at 6:21 AM on April 30.
The earliest sunset is 7:27 PM on April 1 and the latest sunset is 20 minutes later at 7:48 PM on April 30.
Daylight saving time is observed in San Ysidro during 2020, but it neither starts nor ends during April, so the entire month is in daylight saving time.
For reference, on June 20, the longest day of the year, the Sun rises at 6:00 AM and sets 14 hours, 17 minutes later, at 8:17 PM, while on December 21, the shortest day of the year, it rises at 7:04 AM and sets 10 hours, 2 minutes later, at 5:06 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
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 San Ysidro is essentially constant during April, remaining around 0% throughout.
For reference, on August 4, the muggiest day of the year, there are muggy conditions 8% of the time, while on October 20, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in April
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 San Ysidro is essentially constant during April, remaining within 0.2 miles per hour of 11.0 miles per hour throughout.
For reference, on April 10, the windiest day of the year, the daily average wind speed is 11.1 miles per hour, while on August 14, the calmest day of the year, the daily average wind speed is 6.3 miles per hour.
The highest daily average wind speed during April is 11.1 miles per hour on April 10.
Average Wind Speed in April
The hourly average wind direction in San Ysidro throughout April is predominantly from the west, with a peak proportion of 54% on April 22.
Wind Direction in April
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 in San Ysidro typically lasts for 8.0 months (243 days), from around March 12 to around November 11, rarely starting before February 22 or after April 2, and rarely ending before October 23 or after November 30.
The month of April in San Ysidro is more likely than not fully within the growing season, with the chance that a given day is in the growing season increasing from 88% to 100% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in April
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
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 San Ysidro are increasing during April, increasing by 444°F, from 486°F to 930°F, over the course of the month.
Growing Degree Days in April
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 San Ysidro is gradually increasing during April, rising by 0.9 kWh, from 7.0 kWh to 7.9 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in April
For the purposes of this report, the geographical coordinates of San Ysidro are 32.351 deg latitude, -106.811 deg longitude, and 3,914 ft elevation.
The topography within 2 miles of San Ysidro contains only modest variations in elevation, with a maximum elevation change of 167 feet and an average elevation above sea level of 3,921 feet. Within 10 miles contains only modest variations in elevation (1,985 feet). Within 50 miles contains large variations in elevation (5,338 feet).
The area within 2 miles of San Ysidro is covered by cropland (50%) and shrubs (40%), within 10 miles by shrubs (84%) and cropland (11%), and within 50 miles by shrubs (92%).
This report illustrates the typical weather in San Ysidro 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in San Ysidro.
For each station, the records are corrected for the elevation difference between that station and San Ysidro 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 Ysidro is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Ysidro and a given station.
The stations contributing to this reconstruction are: Las Cruces International Airport (74%, 13 kilometers, southwest); Biggs Army Air Field (12%, 69 kilometers, southeast); Holloman Air Force Base (8%, 87 kilometers, northeast); and Truth or Consequences Municipal Airport (6%, 108 kilometers, northwest).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.