Average Weather in February in New Castle Delaware, United States
Daily high temperatures increase by 7°F, from 40°F to 47°F, rarely falling below 28°F or exceeding 61°F.
Daily low temperatures increase by 5°F, from 26°F to 31°F, rarely falling below 14°F or exceeding 43°F.
For reference, on July 21, the hottest day of the year, temperatures in New Castle typically range from 70°F to 86°F, while on January 30, the coldest day of the year, they range from 26°F to 40°F.
Average High and Low Temperature in February
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on February. 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 February
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
The month of February in New Castle experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 52% throughout the month.
The clearest day of the month is February 21, with clear, mostly clear, or partly cloudy conditions 49% of the time.
For reference, on December 24, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 53%, while on September 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 64%.
Cloud Cover Categories in February
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 New Castle, the chance of a wet day over the course of February is essentially constant, remaining around 25% throughout.
For reference, the year's highest daily chance of a wet day is 37% on July 15, and its lowest chance is 22% on October 20.
Over the course of February in New Castle, the chance of a day with only rain increases from 15% to 19%, the chance of a day with mixed snow and rain remains an essentially constant 5% throughout, and the chance of a day with only snow remains an essentially constant 3% throughout.
Probability of Precipitation in February
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 February in New Castle is gradually increasing, starting the month at 2.1 inches, when it rarely exceeds 3.7 inches or falls below 0.6 inches, and ending the month at 2.5 inches, when it rarely exceeds 4.4 inches or falls below 0.9 inches.
The lowest average 31-day accumulation is 2.1 inches on February 7.
Average Monthly Rainfall in February
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day liquid-equivalent snowfall during February in New Castle is essentially constant, remaining about 0.5 inches throughout, and rarely exceeding 1.9 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in February
Over the course of February in New Castle, 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, 4 minutes, implying an average daily increase of 2 minutes, 23 seconds, and weekly increase of 16 minutes, 39 seconds.
The shortest day of the month is February 1, with 10 hours, 12 minutes of daylight and the longest day is February 28, with 11 hours, 16 minutes of daylight.
Hours of Daylight and Twilight in February
The latest sunrise of the month in New Castle is 7:10 AM on February 1 and the earliest sunrise is 33 minutes earlier at 6:37 AM on February 28.
The earliest sunset is 5:21 PM on February 1 and the latest sunset is 31 minutes later at 5:53 PM on February 28.
Daylight saving time is observed in New Castle during 2019, but it neither starts nor ends during February, so the entire month is in standard time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:34 AM and sets 14 hours, 59 minutes later, at 8:33 PM, while on December 22, the shortest day of the year, it rises at 7:19 AM and sets 9 hours, 22 minutes later, at 4:41 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in February
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 New Castle is essentially constant during February, remaining around 0% throughout.
For reference, on July 29, the muggiest day of the year, there are muggy conditions 63% of the time, while on January 9, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in February
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 New Castle is essentially constant during February, remaining within 0.2 miles per hour of 9.6 miles per hour throughout.
For reference, on February 26, the windiest day of the year, the daily average wind speed is 9.8 miles per hour, while on August 12, the calmest day of the year, the daily average wind speed is 6.0 miles per hour.
The highest daily average wind speed during February is 9.8 miles per hour on February 26.
Average Wind Speed in February
Wind Direction in February
New Castle 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 New Castle is essentially constant during February, remaining around 39°F throughout.
The lowest average surface water temperature during February is 39°F on February 16.
Average Water Temperature in February
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 New Castle typically lasts for 7.1 months (217 days), from around April 3 to around November 5, rarely starting before March 18 or after April 19, and rarely ending before October 20 or after November 22.
The month of February in New Castle is reliably fully outside of the growing season.
Time Spent in Various Temperature Bands and the Growing Season in February
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 New Castle are essentially constant during February, remaining within 7°F of 16°F throughout.
Growing Degree Days in February
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 New Castle is gradually increasing during February, rising by 0.9 kWh, from 2.6 kWh to 3.5 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in February
For the purposes of this report, the geographical coordinates of New Castle are 39.662 deg latitude, -75.566 deg longitude, and 7 ft elevation.
The topography within 2 miles of New Castle is essentially flat, with a maximum elevation change of 79 feet and an average elevation above sea level of 12 feet. Within 10 miles is essentially flat (407 feet). Within 50 miles contains only modest variations in elevation (1,096 feet).
The area within 2 miles of New Castle is covered by artificial surfaces (58%) and water (41%), within 10 miles by artificial surfaces (47%) and cropland (20%), and within 50 miles by cropland (34%) and trees (30%).
This report illustrates the typical weather in New Castle 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 New Castle.
For each station, the records are corrected for the elevation difference between that station and New Castle 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 New Castle is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between New Castle and a given station.
The stations contributing to this reconstruction are: New Castle Airport (93%, 3.2 kilometers, west); Philadelphia International Airport (3.1%, 37 kilometers, northeast); Millville Municipal Airport (1.8%, 53 kilometers, southeast); and Dover Air Force Base (1.6%, 60 kilometers, south).
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.
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.