Winter Weather in Greensburg United States

Daily high temperatures are around 64°F, rarely falling below 47°F or exceeding 79°F. The lowest daily average high temperature is 61°F on January 6.

Daily low temperatures are around 45°F, rarely falling below 27°F or exceeding 62°F. The lowest daily average low temperature is 42°F on January 17.

For reference, on August 8, the hottest day of the year, temperatures in Greensburg typically range from 73°F to 92°F, while on January 17, the coldest day of the year, they range from 42°F to 61°F.

The figure below shows you a compact characterization of the hourly average winter 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.

Mezzouna, Tunisia (5,581 miles away); Adana, Turkey (6,601 miles); and Roxby Downs, Australia (9,643 miles) are the far-away foreign places with temperatures most similar to Greensburg (view comparison).

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The winter in Greensburg experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 41% to 47%. The highest chance of overcast or mostly cloudy conditions is 49% on January 3.

The clearest day of the winter is December 1, with clear, mostly clear, or partly cloudy conditions 59% of the time.

For reference, on July 28, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 52%, while on October 11, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 68%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Greensburg, the chance of a wet day over the course of the winter is essentially constant, remaining around 32% throughout.

For reference, the year's highest daily chance of a wet day is 53% on July 28, and its lowest chance is 23% on October 9.

Rainfall

To 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 winter in Greensburg is increasing, starting the season at 4.6 inches, when it rarely exceeds 7.4 inches or falls below 2.1 inches, and ending the season at 5.4 inches, when it rarely exceeds 9.0 inches or falls below 2.2 inches.

The highest average 31-day accumulation is 5.7 inches on February 3.

Over the course of the winter in Greensburg, the length of the day is rapidly increasing. From the start to the end of the season, the length of the day increases by 1 hour, 14 minutes, implying an average daily increase of 50 seconds, and weekly increase of 5 minutes, 47 seconds.

The shortest day of the winter is December 21, with 10 hours, 9 minutes of daylight and the longest day is February 28, with 11 hours, 31 minutes of daylight.

The latest sunrise of the winter in Greensburg is 7:01 AM on January 9 and the earliest sunrise is 32 minutes earlier at 6:29 AM on February 28.

The earliest sunset is 5:00 PM on December 1 and the latest sunset is 1 hour, 0 minutes later at 6:00 PM on February 28.

Daylight saving time is observed in Greensburg during 2024, but it neither starts nor ends during the winter, so the entire season 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, 9 minutes later, at 8:08 PM, while on December 21, the shortest day of the year, it rises at 6:56 AM and sets 10 hours, 9 minutes later, at 5:05 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.

The figure below presents a compact representation of key lunar data for the winter 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.

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 Greensburg is gradually decreasing during the winter, falling from 10% to 7% over the course of the season.

The lowest chance of a muggy day during the winter is 3% on January 29.

For reference, on July 22, the muggiest day of the year, there are muggy conditions 98% of the time, while on January 29, the least muggy day of the year, there are muggy conditions 3% of the time.

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 Greensburg is essentially constant during the winter, remaining within 0.2 miles per hour of 4.8 miles per hour throughout.

For reference, on February 25, the windiest day of the year, the daily average wind speed is 4.9 miles per hour, while on July 23, the calmest day of the year, the daily average wind speed is 3.0 miles per hour.

The highest daily average wind speed during the winter is 4.9 miles per hour on February 25.

The wind direction in Greensburg during the winter is predominantly out of the north from December 1 to February 23 and the south from February 23 to February 28.

Greensburg 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 Greensburg is decreasing during the winter, falling by 5°F, from 66°F to 61°F, over the course of the season.

The lowest average surface water temperature during the winter is 60°F on February 6.

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 Greensburg typically lasts for 9.0 months (274 days), from around February 27 to around November 26, rarely starting before February 2 or after March 22, and rarely ending before November 7 or after December 17.

The winter in Greensburg is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season reaching a low of 1% on January 9.

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 Greensburg are very rapidly decreasing during the winter, decreasing by 5,947°F, from 6,289°F to 343°F, over the course of the season.

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 Greensburg is increasing during the winter, rising by 1.3 kWh, from 3.2 kWh to 4.5 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 2.9 kWh on December 23.

For the purposes of this report, the geographical coordinates of Greensburg are 30.831 deg latitude, -90.672 deg longitude, and 220 ft elevation.

The topography within 2 miles of Greensburg contains only modest variations in elevation, with a maximum elevation change of 118 feet and an average elevation above sea level of 204 feet. Within 10 miles also contains only modest variations in elevation (253 feet). Within 50 miles contains only modest variations in elevation (564 feet).

The area within 2 miles of Greensburg is covered by trees (54%), herbaceous vegetation (29%), and cropland (14%), within 10 miles by trees (59%) and herbaceous vegetation (23%), and within 50 miles by trees (40%) and herbaceous vegetation (31%).