Average Weather in McMillin Washington, United States
In McMillin, the summers are short, warm, dry, and partly cloudy and the winters are very cold, wet, and overcast. Over the course of the year, the temperature typically varies from 35°F to 80°F and is rarely below 25°F or above 90°F.
Based on the tourism score, the best time of year to visit McMillin for warm-weather activities is from mid July to late August.
The warm season lasts for 2.6 months, from June 25 to September 14, with an average daily high temperature above 73°F. The hottest day of the year is August 3, with an average high of 80°F and low of 55°F.
The cool season lasts for 3.6 months, from November 12 to March 1, with an average daily high temperature below 53°F. The coldest day of the year is January 1, with an average low of 35°F and high of 46°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, 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 McMillin, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.
The clearer part of the year in McMillin begins around June 17 and lasts for 3.7 months, ending around October 6. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 76% of the time, and overcast or mostly cloudy 24% of the time.
The cloudier part of the year begins around October 6 and lasts for 8.3 months, ending around June 17. On November 30, the cloudiest day of the year, the sky is overcast or mostly cloudy 77% of the time, and clear, mostly clear, or partly cloudy 23% of the time.
Cloud Cover Categories
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. The chance of wet days in McMillin varies very significantly throughout the year.
The wetter season lasts 7.0 months, from October 9 to May 9, with a greater than 33% chance of a given day being a wet day. The chance of a wet day peaks at 59% on November 17.
The drier season lasts 5.0 months, from May 9 to October 9. The smallest chance of a wet day is 8% on August 5.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 58% on November 17.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. McMillin experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year in McMillin. The most rain falls during the 31 days centered around November 23, with an average total accumulation of 8.8 inches.
The least rain falls around July 30, with an average total accumulation of 0.6 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in McMillin does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in McMillin varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 29 minutes of daylight; the longest day is June 21, with 15 hours, 55 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:12 AM on June 16, and the latest sunrise is 2 hours, 43 minutes later at 7:55 AM on January 1. The earliest sunset is at 4:19 PM on December 11, and the latest sunset is 4 hours, 50 minutes later at 9:08 PM on June 25.
Daylight saving time (DST) is observed in McMillin during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
The perceived humidity level in McMillin, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in McMillin experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 5.9 months, from October 18 to April 14, with average wind speeds of more than 4.2 miles per hour. The windiest day of the year is December 4, with an average hourly wind speed of 5.3 miles per hour.
The calmer time of year lasts for 6.1 months, from April 14 to October 18. The calmest day of the year is August 2, with an average hourly wind speed of 3.1 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in McMillin varies throughout the year.
The wind is most often from the west for 4.9 months, from April 23 to September 21, with a peak percentage of 51% on June 20. The wind is most often from the south for 7.1 months, from September 21 to April 23, with a peak percentage of 50% on January 1.
McMillin 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 water temperature experiences some seasonal variation over the course of the year.
The time of year with warmer water lasts for 3.1 months, from June 24 to September 29, with an average temperature above 55°F. The day of the year with the warmest water is August 21, with an average temperature of 57°F.
The time of year with cooler water lasts for 4.0 months, from December 11 to April 12, with an average temperature below 49°F. The day of the year with the coolest water is February 10, with an average temperature of 47°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in McMillin throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit McMillin for general outdoor tourist activities is from mid July to late August, with a peak score in the first week of August.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit McMillin for hot-weather activities is from mid July to mid August, with a peak score in the first week of August.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
The growing season in McMillin typically lasts for 6.8 months (208 days), from around April 8 to around November 2, rarely starting before March 18 or after April 27, and rarely ending before October 13 or after November 25.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in McMillin should appear around April 14, only rarely appearing before March 25 or after May 5.
Growing Degree Days
The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.1 months, from May 20 to August 23, with an average daily incident shortwave energy per square meter above 5.7 kWh. The brightest day of the year is July 21, with an average of 6.9 kWh.
The darker period of the year lasts for 3.9 months, from October 24 to February 19, with an average daily incident shortwave energy per square meter below 2.1 kWh. The darkest day of the year is December 24, with an average of 0.9 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of McMillin are 47.140 deg latitude, -122.237 deg longitude, and 459 ft elevation.
The topography within 2 miles of McMillin contains significant variations in elevation, with a maximum elevation change of 597 feet and an average elevation above sea level of 352 feet. Within 10 miles contains significant variations in elevation (2,037 feet). Within 50 miles contains large variations in elevation (14,383 feet).
The area within 2 miles of McMillin is covered by artificial surfaces (59%), trees (26%), and cropland (13%), within 10 miles by artificial surfaces (48%) and trees (30%), and within 50 miles by trees (53%) and shrubs (18%).
This report illustrates the typical weather in McMillin, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in McMillin.
For each station, the records are corrected for the elevation difference between that station and McMillin 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 McMillin is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between McMillin and a given station.
The stations contributing to this reconstruction are: Pierce County Airport Thun Field (92%, 5.5 kilometers, southwest); Seattle-Tacoma International Airport (7%, 34 kilometers, north); and Stampede Pass (0.9%, 70 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .