Average Weather in May in Palmer Alaska, United States
In Palmer, the month of May is characterized by rising daily high temperatures, with daily highs increasing by 9°F, from 54°F to 63°F over the course of the month, and rarely exceeding 71°F or dropping below 46°F.
Daily low temperatures increase by 9°F, from 35°F to 44°F, rarely falling below 30°F or exceeding 49°F.
For reference, on July 14, the hottest day of the year, temperatures in Palmer typically range from 51°F to 67°F, while on January 16, the coldest day of the year, they range from 11°F to 23°F.
Average High and Low Temperature in May
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on May. 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 May
The month of May in Palmer experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 61% throughout the month.
The clearest day of the month is May 26, with clear, mostly clear, or partly cloudy conditions 40% of the time.
For reference, on July 11, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 68%, while on March 16, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 47%.
Cloud Cover in May
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Palmer, the chance of a wet day over the course of May is rapidly increasing, starting the month at 22% and ending it at 29%.
For reference, the year's highest daily chance of a wet day is 49% on September 24, and its lowest chance is 19% on March 28.
Over the course of May in Palmer, the chance of a day with only rain increases from 21% to 29%, 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 0% throughout.
Probability of Precipitation in May
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.
The average sliding 31-day rainfall during May in Palmer is increasing, starting the month at 1.1 inches, when it rarely exceeds 1.9 inches or falls below 0.4 inches, and ending the month at 2.0 inches, when it rarely exceeds 3.3 inches or falls below 0.8 inches.
Average Monthly Rainfall in May
Over the course of May in Palmer, the length of the day is very rapidly increasing. From the start to the end of the month, the length of the day increases by 2 hours, 30 minutes, implying an average daily increase of 5 minutes, 1 second, and weekly increase of 35 minutes, 7 seconds.
The shortest day of the month is May 1, with 16 hours, 21 minutes of daylight and the longest day is May 31, with 18 hours, 51 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Palmer is 5:43 AM on May 1 and the earliest sunrise is 1 hour, 15 minutes earlier at 4:29 AM on May 31.
The earliest sunset is 10:04 PM on May 1 and the latest sunset is 1 hour, 16 minutes later at 11:20 PM on May 31.
Daylight saving time is observed in Palmer during 2017, but it neither starts nor ends during May, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 4:11 AM and sets 19 hours, 33 minutes later, at 11:44 PM, while on December 21, the shortest day of the year, it rises at 10:15 AM and sets 5 hours, 18 minutes later, at 3:33 PM.
Sunrise & Sunset with Twilight in May
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 Palmer is essentially constant during May, remaining around 0% throughout.
Humidity Comfort Levels in May
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 Palmer is essentially constant during May, remaining within 0.2 miles per hour of 2.4 miles per hour throughout.
For reference, on January 8, the windiest day of the year, the daily average wind speed is 4.1 miles per hour, while on June 26, the calmest day of the year, the daily average wind speed is 2.0 miles per hour.
Average Wind Speed in May
Wind Direction in May
Palmer 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 Palmer is increasing during May, rising by 6°F, from 34°F to 39°F, over the course of the month.
Average Water Temperature in May
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 Palmer is gradually increasing during May, rising by 0.9 kWh, from 4.9 kWh to 5.8 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in May
For the purposes of this report, the geographical coordinates of Palmer are 61.600 deg latitude, -149.113 deg longitude, and 226 ft elevation.
The topography within 2 miles of Palmer contains only modest variations in elevation, with a maximum elevation change of 410 feet and an average elevation above sea level of 251 feet. Within 10 miles contains only modest variations in elevation (6,260 feet). Within 50 miles also contains extreme variations in elevation (13,104 feet).
The area within 2 miles of Palmer is covered by shrubs (37%), sparse vegetation (25%), and artificial surfaces (17%), within 10 miles by trees (38%) and shrubs (21%), and within 50 miles by trees (21%) and shrubs (21%).
This report illustrates the typical weather in Palmer year round, 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 Palmer.
For each station, the records are corrected for the elevation difference between that station and Palmer 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 Palmer is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Palmer 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 Tables of the Sun, Moon and Planets , 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 aiports 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.