Fall Weather in New Castle United StatesDaily high temperatures decrease by 33°F, from 82°F to 49°F, rarely falling below 35°F or exceeding 90°F. Daily low temperatures decrease by 29°F, from 63°F to 34°F, rarely falling below 22°F or exceeding 71°F. For reference, on July 20, the hottest day of the year, temperatures in New Castle typically range from 68°F to 86°F, while on January 29, the coldest day of the year, they range from 25°F to 40°F. The figure below shows you a compact characterization of the hourly average fall 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. Tbilisi, Georgia (6,077 miles away) is the far-away foreign place with temperatures most similar to New Castle (view comparison). CloudsThe fall in New Castle experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 32% to 53%. The clearest day of the fall is September 1, with clear, mostly clear, or partly cloudy conditions 68% of the time. For reference, on January 2, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 59%, while on August 22, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 68%. PrecipitationA 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 the fall is essentially constant, remaining around 26% throughout. For reference, the year's highest daily chance of a wet day is 41% on May 11, and its lowest chance is 23% on January 13. Over the course of the fall in New Castle, the chance of a day with only rain remains an essentially constant 26% throughout, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 1% throughout. RainfallTo 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 fall in New Castle is increasing, starting the season at 2.6 inches, when it rarely exceeds 4.7 inches or falls below 0.8 inches, and ending the season at 3.4 inches, when it rarely exceeds 5.7 inches or falls below 1.5 inches. The highest average 31-day accumulation is 3.4 inches on November 30. The lowest average 31-day accumulation is 2.6 inches on September 5. SnowfallAs with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day. The average sliding 31-day snowfall during the fall in New Castle is increasing, starting the season at -0.0 inches, when it rarely exceeds 0.0 inches or falls below -0.0 inches, and ending the season at 1.3 inches, when it rarely exceeds 4.8 inches or falls below -0.0 inches. SunOver the course of the fall in New Castle, the length of the day is very rapidly decreasing. From the start to the end of the season, the length of the day decreases by 3 hours, 17 minutes, implying an average daily decrease of 2 minutes, 12 seconds, and weekly decrease of 15 minutes, 21 seconds. The shortest day of the fall is November 30, with 9 hours, 42 minutes of daylight and the longest day is September 1, with 12 hours, 59 minutes of daylight. The latest sunrise of the fall in New Castle is 8:08 AM on November 2 and the earliest sunrise is 59 minutes earlier at 7:09 AM on November 3. The latest sunset is 8:09 PM on September 1 and the earliest sunset is 2 hours, 49 minutes earlier at 5:20 PM on November 30. Daylight saving time (DST) starts at 1:00 AM on November 3, 2024, shifting sunrise and sunset to be an hour later. For reference, on June 20, the longest day of the year, the Sun rises at 6:16 AM and sets 14 hours, 51 minutes later, at 9:07 PM, while on December 21, the shortest day of the year, it rises at 7:54 AM and sets 9 hours, 29 minutes later, at 5:23 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. MoonThe figure below presents a compact representation of key lunar data for the fall of 2024. 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. HumidityWe 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 very rapidly decreasing during the fall, falling from 41% to 0% over the course of the season. For reference, on July 23, the muggiest day of the year, there are muggy conditions 63% of the time, while on November 29, the least muggy day of the year, there are muggy conditions 0% of the time. WindThis 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 rapidly increasing during the fall, increasing from 4.7 miles per hour to 6.8 miles per hour over the course of the season. For reference, on February 25, the windiest day of the year, the daily average wind speed is 7.8 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 4.3 miles per hour. The hourly average wind direction in New Castle throughout the fall is predominantly from the south, with a peak proportion of 39% on November 13. Growing SeasonDefinitions 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 6.4 months (196 days), from around April 11 to around October 24, rarely starting before March 25 or after April 27, and rarely ending before October 7 or after November 10. During the fall in New Castle, the chance that a given day is within the growing season is very rapidly decreasing falling from 100% to -0% over the course of the season. 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 rapidly increasing during the fall, increasing by 853°F, from 3,082°F to 3,935°F, over the course of the season. Solar EnergyThis 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 very rapidly decreasing during the fall, falling by 3.6 kWh, from 5.7 kWh to 2.1 kWh, over the course of the season. TopographyFor the purposes of this report, the geographical coordinates of New Castle are 38.433 deg latitude, -85.170 deg longitude, and 830 ft elevation. The topography within 2 miles of New Castle contains only modest variations in elevation, with a maximum elevation change of 285 feet and an average elevation above sea level of 833 feet. Within 10 miles contains only modest variations in elevation (538 feet). Within 50 miles also contains significant variations in elevation (810 feet). The area within 2 miles of New Castle is covered by cropland (98%), within 10 miles by cropland (75%) and trees (25%), and within 50 miles by cropland (47%) and trees (44%). Data SourcesThis report illustrates the typical weather in New Castle, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointThere 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:
To get a sense of how much these sources agree with each other, you can view a comparison of New Castle and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data. Other DataAll 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 airports and weather stations are provided by AskGeo.com . Maps are © OpenStreetMap contributors. DisclaimerThe 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. Please review our full terms contained on our Terms of Service page. |