The lowest daily average low temperature is 45°F on December 27. Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations. The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. Daylight saving time is not observed in Phoenix during 2020. The thin dotted line is the corresponding average liquid-equivalent snowfall. The figure below presents a compact representation of key lunar data for December 2020. The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. 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. This report illustrates the typical weather in Phoenix, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. The lowest daily average high temperature is 65°F on December 25. 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. C° F° 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. Clear throughout the day. The shaded overlays indicate night and civil twilight. The highest chance of overcast or mostly cloudy conditions is 36% on December 27. The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands. Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database . MERRA-2 Modern-Era Retrospective Analysis. The lowest daily average wind speed during December is 6.7 miles per hour on December 16. 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. Get the monthly weather forecast for Phoenix, AZ, including daily high/low, historical averages, to help you plan ahead. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. The month of December in Phoenix experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 31% to 35%. The average l… The earliest sunrise of the month in Phoenix is 7:14 AM on December 1 and the latest sunrise is 18 minutes later at 7:32 AM on December 31. Arizona weather in December 2020. The number of hours during which the Sun is visible (black line). WeatherTAB Phoenix, Arizona ... December 2020 Summary Precipitation Forecast Wetter Than Normal. Questions? support@__remove_this_part__weatherspark.com. Toggle navigation. Daily high temperatures decrease by 4°F, from 69°F to 66°F, rarely falling below 57°F or exceeding 77°F. Phoenix Weather History for April 1, 2019. For reference, on June 20, the longest day of the year, the Sun rises at 5:18 AM and sets 14 hours, 22 minutes later, at 7:41 PM, while on December 21, the shortest day of the year, it rises at 7:28 AM and sets 9 hours, 56 minutes later, at 5:24 PM. The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than. Ouargla, Algeria (6,361 miles away) is the far-away foreign place with temperatures most similar to Phoenix (view comparison). 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). In most years, Phoenix averages a daily maximum temperature for December that's between 65 and 70 degrees Fahrenheit (18 to 21 degrees Celsius). The average growing degree days accumulated over the course of December, with 25th to 75th and 10th to 90th percentile bands. 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 normal high for that period is 67.5, so it has been a little cooler. Does it ever rain in Phoenix in December? The average accumulated growing degree days in Phoenix are increasing during December, increasing by 187°F, from 7,956°F to 8,143°F, over the course of the month. Phoenix, AZ Weather Calendar star_ratehome. The percentage of time spent at various humidity comfort levels, categorized by dew point. [PHOTOS: Surprise storm brings rain, hail in north Phoenix, Scottsdale] The National Weather Service said up to a quarter-size hail was possible. Weather forecasts that start where the others stop. The National Weather Service in Phoenix issued a severe thunderstorm warning for much of the southeast Valley effective until 4:30 p.m. A significant weather advisory was in … Be prepared with the most accurate 10-day forecast for Seaside, CA with highs, lows, chance of precipitation from The Weather Channel and Weather.com One day later, on December … According to data from the National Weather Service, the start of the winter was actually very…average. We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Within 10 miles is essentially flat (1,722 feet). December is the coldest month overall for Phoenix and the … The minimum temperature usually falls between 43 and 46 °F (6 to 8 °C). Show weather for: Scroll right to see more Conditions Comfort ; Time Temp Weather Wind Humidity Barometer Visibility; 12:51 am Mon, Apr 1: 69 °F: Passing clouds. The lowest average daily incident shortwave solar energy during December is 3.1 kWh on December 23. Report Station. Phoenix - Recent December Temperatures and Rainfall The numbers here describe what the December weather in Phoenix, Arizona was like for every year since 2010. The stations contributing to this reconstruction are: Phoenix Sky Harbor International Airport (74%, 7 kilometers, east); Phoenix-Deer Valley Airport (9%, 27 kilometers, north); Phoenix Goodyear Airport (9%, 29 kilometers, west); and Luke Air Force Base (8%, 29 kilometers, northwest). The shaded overlays indicate night and civil twilight. including sunrise/sunset and moon phases. The average hourly wind speed in Phoenix is essentially constant during December, remaining within 0.1 miles per hour of 6.8 miles per hour throughout. The percentage of time spent in various temperature bands. For reference, on July 4, the hottest day of the year, temperatures in Phoenix typically range from 84°F to 107°F, while on December 27, the coldest day of the year, they range from 45°F to 65°F. TUCSON, AZ — Here's your local weather forecast for the coming weekend, as reported by Darksky. For the purposes of this report, the geographical coordinates of Phoenix are 33.448 deg latitude, -112.074 deg longitude, and 1,083 ft elevation. The estimated value at Phoenix is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Phoenix and a given station. The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds. Lower dew points feel drier and higher dew points feel more humid. The clearest day of the month is December 2, with clear, mostly clear, or partly cloudy conditions 69% of the time. For reference, on February 19, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 38%, while on June 13, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 86%. 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. But when you look at the average low temperature and the average temperature (taking the average high and low and dividing by two), the numbers get even closer. Toggle navigation. Enter Your City, ST or ZIP Code ... (1896-2019) Record High: 87 on Nov 23 2017, Nov 27 2014, and Nov 23 1950. The line of … The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands. High 69, low 38. From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night. The shortest day of the month is December 21, with 9 hours, 56 minutes of daylight and the longest day is December 1, with 10 hours, 5 minutes of daylight. The topography within 2 miles of Phoenix is essentially flat, with a maximum elevation change of 56 feet and an average elevation above sea level of 1,082 feet. Within 50 miles contains very significant variations in elevation (6,909 feet). Phoenix Weather for December 2020. For reference, on August 13, the muggiest day of the year, there are muggy conditions 24% of the time, while on November 3, the least muggy day of the year, there are muggy conditions 0% of the time. December is on average the COOLEST month. The average high temperature in Phoenix from Dec. 1 (the start of winter for meteorologists) through Feb. 10 has been 66.3 degrees, according to National Weather Service numbers. 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