Summer Weather in Parker Colorado, United States
Daily high temperatures increase by 6°F, from 74°F to 81°F, rarely falling below 62°F or exceeding 93°F. The highest daily average high temperature is 85°F on July 14.
Daily low temperatures increase by 6°F, from 49°F to 55°F, rarely falling below 41°F or exceeding 65°F. The highest daily average low temperature is 60°F on July 21.
For reference, on July 13, the hottest day of the year, temperatures in Parker typically range from 59°F to 85°F, while on December 30, the coldest day of the year, they range from 20°F to 41°F.
Average High and Low Temperature in the Summer in Parker
The figure below shows you a compact characterization of the hourly average summer 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.
Average Hourly Temperature in the Summer in Parker
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The summer in Parker experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 38% to 31%.
The clearest day of the summer is July 2, with clear, mostly clear, or partly cloudy conditions 73% of the time.
For reference, on May 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 46%, while on September 16, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 75%.
Cloud Cover Categories in the Summer in Parker
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 Parker, the chance of a wet day over the course of the summer is gradually decreasing, starting the season at 26% and ending it at 22%.
For reference, the year's highest daily chance of a wet day is 32% on August 4, and its lowest chance is 4% on January 1.
Probability of Precipitation in the Summer in Parker
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 summer in Parker is gradually decreasing, starting the season at 1.6 inches, when it rarely exceeds 2.9 inches or falls below 0.6 inches, and ending the season at 1.2 inches, when it rarely exceeds 2.1 inches or falls below 0.4 inches.
The highest average 31-day accumulation is 1.8 inches on July 30.
Average Monthly Rainfall in the Summer in Parker
Over the course of the summer in Parker, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 43 minutes, implying an average daily decrease of 1 minute, 8 seconds, and weekly decrease of 7 minutes, 55 seconds.
The shortest day of the summer is August 31, with 13 hours, 4 minutes of daylight and the longest day is June 20, with 14 hours, 58 minutes of daylight.
Hours of Daylight and Twilight in the Summer in Parker
The earliest sunrise of the summer in Parker is 5:31 AM on June 13 and the latest sunrise is 56 minutes later at 6:26 AM on August 31.
The latest sunset is 8:30 PM on June 27 and the earliest sunset is 59 minutes earlier at 7:30 PM on August 31.
Daylight saving time is observed in Parker during 2021, but it neither starts nor ends during the summer, so the entire season is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:32 AM and sets 14 hours, 58 minutes later, at 8:29 PM, while on December 21, the shortest day of the year, it rises at 7:16 AM and sets 9 hours, 23 minutes later, at 4:38 PM.
Sunrise & Sunset with Twilight in the Summer in Parker
The figure below presents a compact representation of key lunar data for the summer of 2021. 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.
Moon Rise, Set & Phases in the Summer in Parker
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 Parker is essentially constant during the summer, remaining around 0% throughout.
For reference, on July 27, 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 the Summer in Parker
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 Parker is gradually decreasing during the summer, decreasing from 8.4 miles per hour to 7.5 miles per hour over the course of the season.
For reference, on April 1, the windiest day of the year, the daily average wind speed is 10.0 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 7.4 miles per hour.
The lowest daily average wind speed during the summer is 7.4 miles per hour on August 19.
Average Wind Speed in the Summer in Parker
The hourly average wind direction in Parker throughout the summer is predominantly from the west, with a peak proportion of 34% on August 30.
Wind Direction in the Summer in Parker
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 Parker typically lasts for 5.0 months (153 days), from around May 5 to around October 5, rarely starting before April 19 or after May 21, and rarely ending before September 15 or after October 24.
The summer in Parker is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in the Summer in Parker
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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 Parker are very rapidly increasing during the summer, increasing by 1,694°F, from 452°F to 2,146°F, over the course of the season.
Growing Degree Days in the Summer in Parker
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 Parker is decreasing during the summer, falling by 1.4 kWh, from 7.6 kWh to 6.2 kWh, over the course of the season.
The highest average daily incident shortwave solar energy during the summer is 8.0 kWh on June 21.
Average Daily Incident Shortwave Solar Energy in the Summer in Parker
For the purposes of this report, the geographical coordinates of Parker are 39.519 deg latitude, -104.761 deg longitude, and 5,866 ft elevation.
The topography within 2 miles of Parker contains only modest variations in elevation, with a maximum elevation change of 413 feet and an average elevation above sea level of 5,921 feet. Within 10 miles contains only modest variations in elevation (1,178 feet). Within 50 miles contains very significant variations in elevation (9,518 feet).
The area within 2 miles of Parker is covered by grassland (48%), shrubs (35%), and artificial surfaces (16%), within 10 miles by grassland (59%) and shrubs (24%), and within 50 miles by grassland (44%) and trees (22%).
This report illustrates the typical weather in Parker, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Parker.
For each station, the records are corrected for the elevation difference between that station and Parker 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 Parker is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Parker and a given station.
All 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 © 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.