Average Weather in April in Crescent City California, United States
Daily high temperatures increase by 2°F, from 55°F to 57°F, rarely falling below 51°F or exceeding 62°F.
Daily low temperatures increase by 2°F, from 44°F to 46°F, rarely falling below 38°F or exceeding 52°F.
For reference, on August 22, the hottest day of the year, temperatures in Crescent City typically range from 53°F to 64°F, while on December 23, the coldest day of the year, they range from 42°F to 53°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
The month of April in Crescent City experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 62% to 53%.
The clearest day of the month is April 30, with clear, mostly clear, or partly cloudy conditions 47% of the time.
For reference, on January 9, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 69%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 88%.
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 Crescent City, the chance of a wet day over the course of April is very rapidly decreasing, starting the month at 39% and ending it at 24%.
For reference, the year's highest daily chance of a wet day is 52% on December 1, and its lowest chance is 1% on August 3.
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 Crescent City is very rapidly decreasing, starting the month at 5.2 inches, when it rarely exceeds 9.9 inches or falls below 1.5 inches, and ending the month at 2.5 inches, when it rarely exceeds 5.0 inches or falls below 0.5 inches.
Average Monthly Rainfall in April
Over the course of April in Crescent City, 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, 17 minutes, implying an average daily increase of 2 minutes, 39 seconds, and weekly increase of 18 minutes, 32 seconds.
The shortest day of the month is April 1, with 12 hours, 43 minutes of daylight and the longest day is April 30, with 14 hours, 0 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Crescent City is 6:59 AM on April 1 and the earliest sunrise is 45 minutes earlier at 6:14 AM on April 30.
The earliest sunset is 7:42 PM on April 1 and the latest sunset is 32 minutes later at 8:14 PM on April 30.
Daylight saving time is observed in Crescent City during 2018, but it neither starts nor ends during April, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:42 AM and sets 15 hours, 13 minutes later, at 8:55 PM, while on December 21, the shortest day of the year, it rises at 7:40 AM and sets 9 hours, 9 minutes later, at 4:49 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 Crescent City is essentially constant during April, remaining around 0% throughout.
For reference, on September 5, 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 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 Crescent City is gradually decreasing during April, decreasing from 8.8 miles per hour to 8.2 miles per hour over the course of the month.
For reference, on December 15, the windiest day of the year, the daily average wind speed is 10.0 miles per hour, while on September 25, the calmest day of the year, the daily average wind speed is 7.1 miles per hour.
Average Wind Speed in April
Wind Direction in April
Crescent City 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 Crescent City is essentially constant during April, remaining around 51°F throughout.
Average Water Temperature 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 Crescent City typically lasts for 11 months (347 days), from around January 19 to around January 1, rarely starting after March 14, or ending before November 29.
The month of April in Crescent City is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in April
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 Crescent City are gradually increasing during April, increasing by 65°F, from 147°F to 212°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 Crescent City is increasing during April, rising by 1.5 kWh, from 4.4 kWh to 5.9 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 Crescent City are 41.756 deg latitude, -124.202 deg longitude, and 13 ft elevation.
The topography within 2 miles of Crescent City is essentially flat, with a maximum elevation change of 66 feet and an average elevation above sea level of 19 feet. Within 10 miles is essentially flat (2,343 feet). Within 50 miles contains large variations in elevation (7,215 feet).
The area within 2 miles of Crescent City is covered by herbaceous vegetation (35%), water (34%), and artificial surfaces (24%), within 10 miles by water (55%) and trees (30%), and within 50 miles by water (49%) and trees (38%).
This report illustrates the typical weather in Crescent City 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 Crescent City.
For each station, the records are corrected for the elevation difference between that station and Crescent City 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 Crescent City is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Crescent City and a given station.
The stations contributing to this reconstruction are: Jack Mc Namara Field (99%, 4.0 kilometers, northwest); Arcata-Eureka Airport (1.0%, 87 kilometers, south); and Siskiyou County Airport (0.4%, 144 kilometers, east).
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.