Average Weather in July in Tacoma Washington, United States
Daily high temperatures increase by 5°F, from 74°F to 78°F, rarely falling below 65°F or exceeding 88°F.
Daily low temperatures increase by 2°F, from 54°F to 57°F, rarely falling below 50°F or exceeding 61°F.
For reference, on August 3, the hottest day of the year, temperatures in Tacoma typically range from 57°F to 78°F, while on January 1, the coldest day of the year, they range from 37°F to 45°F.
Average High and Low Temperature in July
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. 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 July
The month of July in Tacoma experiences rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 38% to 24%.
The clearest day of the month is July 31, with clear, mostly clear, or partly cloudy conditions 76% of the time.
For reference, on January 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 74%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 77%.
Cloud Cover Categories in July
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 Tacoma, the chance of a wet day over the course of July is very rapidly decreasing, starting the month at 17% and ending it at 8%.
For reference, the year's highest daily chance of a wet day is 57% on November 18, and its lowest chance is 7% on August 5.
Probability of Precipitation in July
The average sliding 31-day rainfall during July in Tacoma is decreasing, starting the month at 1.1 inches, when it rarely exceeds 2.0 inches or falls below 0.2 inches, and ending the month at 0.5 inches, when it rarely exceeds 1.4 inches.
The lowest average 31-day accumulation is 0.5 inches on July 29.
Average Monthly Rainfall in July
Over the course of July in Tacoma, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 55 minutes, implying an average daily decrease of 1 minute, 49 seconds, and weekly decrease of 12 minutes, 46 seconds.
The shortest day of the month is July 31, with 14 hours, 57 minutes of daylight and the longest day is July 1, with 15 hours, 52 minutes of daylight.
Hours of Daylight and Twilight in July
The earliest sunrise of the month in Tacoma is 5:17 AM on July 1 and the latest sunrise is 30 minutes later at 5:47 AM on July 31.
The latest sunset is 9:09 PM on July 1 and the earliest sunset is 25 minutes earlier at 8:44 PM on July 31.
Daylight saving time is observed in Tacoma during 2018, but it neither starts nor ends during July, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:13 AM and sets 15 hours, 56 minutes later, at 9:09 PM, while on December 21, the shortest day of the year, it rises at 7:53 AM and sets 8 hours, 28 minutes later, at 4:22 PM.
Sunrise & Sunset with Twilight in July
The chance that a given day will be muggy in Tacoma is essentially constant during July, remaining around 0% throughout.
For reference, on September 13, 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 July
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Tacoma is essentially constant during July, remaining within 0.1 miles per hour of 3.2 miles per hour throughout.
For reference, on December 1, the windiest day of the year, the daily average wind speed is 5.4 miles per hour, while on August 2, the calmest day of the year, the daily average wind speed is 3.1 miles per hour.
Average Wind Speed in July
Wind Direction in July
Tacoma 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 Tacoma is essentially constant during July, remaining within 1°F of 56°F throughout.
Average Water Temperature in July
The growing season in Tacoma typically lasts for 8.4 months (259 days), from around March 6 to around November 19, rarely starting before February 7 or after April 3, and rarely ending before October 29 or after December 16.
The month of July in Tacoma is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in July
The average accumulated growing degree days in Tacoma are increasing during July, increasing by 438°F, from 637°F to 1,075°F, over the course of the month.
Growing Degree Days in July
The average daily incident shortwave solar energy in Tacoma is essentially constant during July, remaining within 0.1 kWh of 6.7 kWh throughout.
The highest average daily incident shortwave solar energy during July is 6.8 kWh on July 21.
Average Daily Incident Shortwave Solar Energy in July
For the purposes of this report, the geographical coordinates of Tacoma are 47.253 deg latitude, -122.444 deg longitude, and 197 ft elevation.
The topography within 2 miles of Tacoma contains only modest variations in elevation, with a maximum elevation change of 410 feet and an average elevation above sea level of 178 feet. Within 10 miles contains only modest variations in elevation (545 feet). Within 50 miles contains significant variations in elevation (14,383 feet).
The area within 2 miles of Tacoma is covered by artificial surfaces (74%) and water (26%), within 10 miles by artificial surfaces (60%) and water (24%), and within 50 miles by trees (53%) and shrubs (16%).
This report illustrates the typical weather in Tacoma 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Tacoma.
For each station, the records are corrected for the elevation difference between that station and Tacoma 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 Tacoma is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Tacoma and a given station.
The stations contributing to this reconstruction are: Tacoma Narrows Airport (48%, 10 kilometers, west); McChord Field Airport (Joint Base Lewis-McChord) (38%, 12 kilometers, south); and Seattle-Tacoma International Airport (14%, 23 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .