Average Weather in May in Clear Lake Washington, United States
Daily high temperatures increase by 5°F, from 61°F to 66°F, rarely falling below 54°F or exceeding 75°F.
Daily low temperatures increase by 5°F, from 44°F to 49°F, rarely falling below 37°F or exceeding 54°F.
For reference, on August 3, the hottest day of the year, temperatures in Clear Lake typically range from 54°F to 77°F, while on December 23, the coldest day of the year, they range from 35°F to 44°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 Clear Lake experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 58% throughout the month.
The clearest day of the month is May 19, with clear, mostly clear, or partly cloudy conditions 43% of the time.
For reference, on November 30, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 75%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%.
Cloud Cover Categories in May
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 Clear Lake, the chance of a wet day over the course of May is gradually decreasing, starting the month at 33% and ending it at 30%.
For reference, the year's highest daily chance of a wet day is 61% on November 18, and its lowest chance is 10% on August 1.
Probability of Precipitation in May
The average sliding 31-day rainfall during May in Clear Lake is decreasing, starting the month at 2.9 inches, when it rarely exceeds 4.8 inches or falls below 1.0 inches, and ending the month at 2.4 inches, when it rarely exceeds 4.1 inches or falls below 0.8 inches.
Average Monthly Rainfall in May
Over the course of May in Clear Lake, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 15 minutes, implying an average daily increase of 2 minutes, 30 seconds, and weekly increase of 17 minutes, 31 seconds.
The shortest day of the month is May 1, with 14 hours, 34 minutes of daylight and the longest day is May 31, with 15 hours, 49 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Clear Lake is 5:49 AM on May 1 and the earliest sunrise is 37 minutes earlier at 5:12 AM on May 31.
The earliest sunset is 8:23 PM on May 1 and the latest sunset is 38 minutes later at 9:01 PM on May 31.
Daylight saving time is observed in Clear Lake during 2018, 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 5:07 AM and sets 16 hours, 7 minutes later, at 9:14 PM, while on December 21, the shortest day of the year, it rises at 7:58 AM and sets 8 hours, 18 minutes later, at 4:16 PM.
Sunrise & Sunset with Twilight in May
The chance that a given day will be muggy in Clear Lake is essentially constant during May, remaining around 0% throughout.
For reference, on August 3, the muggiest day of the year, there are muggy conditions 1% 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 May
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Clear Lake is essentially constant during May, remaining within 0.2 miles per hour of 3.5 miles per hour throughout.
For reference, on December 4, the windiest day of the year, the daily average wind speed is 5.5 miles per hour, while on August 5, the calmest day of the year, the daily average wind speed is 2.6 miles per hour.
Average Wind Speed in May
Wind Direction in May
Clear Lake 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 Clear Lake is gradually increasing during May, rising by 2°F, from 49°F to 52°F, over the course of the month.
Average Water Temperature in May
The growing season in Clear Lake typically lasts for 7.5 months (229 days), from around March 26 to around November 10, rarely starting before March 1 or after April 26, and rarely ending before October 23 or after December 1.
The month of May in Clear Lake is very likely fully within the growing season, with the chance that a given day is in the growing season gradually increasing from 93% to 100% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in May
The average accumulated growing degree days in Clear Lake are gradually increasing during May, increasing by 163°F, from 120°F to 283°F, over the course of the month.
Growing Degree Days in May
The average daily incident shortwave solar energy in Clear Lake is gradually increasing during May, rising by 0.6 kWh, from 5.0 kWh to 5.6 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 Clear Lake are 48.464 deg latitude, -122.234 deg longitude, and 52 ft elevation.
The topography within 2 miles of Clear Lake contains very significant variations in elevation, with a maximum elevation change of 1,106 feet and an average elevation above sea level of 208 feet. Within 10 miles contains very significant variations in elevation (4,255 feet). Within 50 miles also contains extreme variations in elevation (10,771 feet).
The area within 2 miles of Clear Lake is covered by cropland (34%), herbaceous vegetation (32%), and trees (20%), within 10 miles by trees (40%) and cropland (30%), and within 50 miles by trees (44%) and water (25%).
This report illustrates the typical weather in Clear Lake 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 Clear Lake.
For each station, the records are corrected for the elevation difference between that station and Clear Lake 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 Clear Lake is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Clear Lake and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .