Winter Weather in Silt Colorado, United States

Daily high temperatures increase by 6°F, from 41°F to 47°F, rarely falling below 24°F or exceeding 57°F. The lowest daily average high temperature is 35°F on January 5.

Daily low temperatures increase by 4°F, from 20°F to 23°F, rarely falling below -1°F or exceeding 33°F. The lowest daily average low temperature is 13°F on January 8.

For reference, on July 12, the hottest day of the year, temperatures in Silt typically range from 55°F to 89°F, while on January 7, the coldest day of the year, they range from 13°F to 35°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.

Hacıbektaş, Turkey (6,518 miles away) and Bījār, Iran (7,001 miles) are the far-away foreign places with temperatures most similar to Silt (view comparison).

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The winter in Silt experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 42% to 48%. The highest chance of overcast or mostly cloudy conditions is 49% on February 22.

The clearest day of the winter is January 8, with clear, mostly clear, or partly cloudy conditions 59% of the time.

For reference, on February 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 49%, while on September 13, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 78%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Silt, the chance of a wet day over the course of the winter is essentially constant, remaining around 15% throughout.

For reference, the year's highest daily chance of a wet day is 23% on May 1, and its lowest chance is 11% on June 19.

Over the course of the winter in Silt, the chance of a day with only rain increases from 5% to 10%, the chance of a day with mixed snow and rain remains an essentially constant 6% throughout, and the chance of a day with only snow decreases from 5% to 2%.

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 Silt is essentially constant, remaining about 0.5 inches throughout, and rarely exceeding 1.4 inches.

The lowest average 31-day accumulation is 0.3 inches on January 18.

Snowfall

As 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 winter in Silt is decreasing, starting the season at 3.1 inches, when it rarely exceeds 7.1 inches or falls below 0.4 inches, and ending the season at 1.9 inches, when it rarely exceeds 4.1 inches or falls below 0.2 inches.

The highest average 31-day accumulation is 4.6 inches on December 27.

Over the course of the winter in Silt, 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, 42 minutes, implying an average daily increase of 1 minute, 9 seconds, and weekly increase of 8 minutes, 3 seconds.

The shortest day of the winter is December 21, with 9 hours, 22 minutes of daylight and the longest day is February 28, with 11 hours, 17 minutes of daylight.

The latest sunrise of the winter in Silt is 7:31 AM on January 4 and the earliest sunrise is 47 minutes earlier at 6:44 AM on February 28.

The earliest sunset is 4:46 PM on December 6 and the latest sunset is 1 hour, 15 minutes later at 6:01 PM on February 28.

Daylight saving time is observed in Silt during 2025, but it neither starts nor ends during the winter, so the entire season is in standard time.

For reference, on June 21, the longest day of the year, the Sun rises at 5:43 AM and sets 14 hours, 58 minutes later, at 8:41 PM, while on December 21, the shortest day of the year, it rises at 7:27 AM and sets 9 hours, 22 minutes later, at 4:50 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 2025. 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 Silt is essentially constant during the winter, remaining around 0% throughout.

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 Silt is gradually increasing during the winter, increasing from 5.8 miles per hour to 6.4 miles per hour over the course of the season.

For reference, on April 4, the windiest day of the year, the daily average wind speed is 7.1 miles per hour, while on August 5, the calmest day of the year, the daily average wind speed is 5.2 miles per hour.

The lowest daily average wind speed during the winter is 5.7 miles per hour on January 23.

The hourly average wind direction in Silt throughout the winter is predominantly from the south, with a peak proportion of 50% on December 5.

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 Silt typically lasts for 4.7 months (144 days), from around May 10 to around October 2, rarely starting before April 24 or after May 27, and rarely ending before September 14 or after October 20.

The winter in Silt is reliably fully outside of the growing 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 Silt are very rapidly decreasing during the winter, decreasing by 2,666°F, from 2,669°F to 4°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 Silt is rapidly increasing during the winter, rising by 1.6 kWh, from 2.6 kWh to 4.2 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 2.4 kWh on December 22.

For the purposes of this report, the geographical coordinates of Silt are 39.549 deg latitude, -107.656 deg longitude, and 5,453 ft elevation.

The topography within 2 miles of Silt contains significant variations in elevation, with a maximum elevation change of 535 feet and an average elevation above sea level of 5,568 feet. Within 10 miles contains significant variations in elevation (3,278 feet). Within 50 miles contains large variations in elevation (9,403 feet).

The area within 2 miles of Silt is covered by cropland (51%) and shrubs (39%), within 10 miles by shrubs (56%) and trees (29%), and within 50 miles by trees (51%) and shrubs (40%).