Average Weather in West Valley City Utah, United States
In West Valley City, the summers are hot, dry, and mostly clear and the winters are very cold and partly cloudy. Over the course of the year, the temperature typically varies from 23°F to 93°F and is rarely below 10°F or above 100°F.
Based on the tourism score, the best time of year to visit West Valley City for warm-weather activities is from mid June to mid September.
The hot season lasts for 3.1 months, from June 9 to September 13, with an average daily high temperature above 81°F. The hottest day of the year is July 23, with an average high of 93°F and low of 68°F.
The cold season lasts for 3.0 months, from November 22 to February 23, with an average daily high temperature below 47°F. The coldest day of the year is January 7, with an average low of 23°F and high of 35°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 West Valley City, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in West Valley City begins around May 31 and lasts for 4.8 months, ending around October 26. On August 19, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 80% of the time, and overcast or mostly cloudy 20% of the time.
The cloudier part of the year begins around October 26 and lasts for 7.2 months, ending around May 31. On March 3, the cloudiest day of the year, the sky is overcast or mostly cloudy 53% of the time, and clear, mostly clear, or partly cloudy 47% 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 West Valley City varies throughout the year.
The wetter season lasts 8.6 months, from September 19 to June 7, with a greater than 17% chance of a given day being a wet day. The chance of a wet day peaks at 27% on April 26.
The drier season lasts 3.4 months, from June 7 to September 19. The smallest chance of a wet day is 8% on June 30.
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 26% on April 30.
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. West Valley City experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 11 months, from July 20 to July 4, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around May 9, with an average total accumulation of 1.7 inches.
The rainless period of the year lasts for 2.3 weeks, from July 4 to July 20. The least rain falls around July 12, with an average total accumulation of 0.5 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. West Valley City experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 3.8 months, from November 16 to March 9, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 5, with an average total liquid-equivalent accumulation of 0.4 inches.
The snowless period of the year lasts for 8.2 months, from March 9 to November 16. The least snow falls around July 28, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in West Valley City varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 15 minutes of daylight; the longest day is June 21, with 15 hours, 6 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:56 AM on June 14, and the latest sunrise is 2 hours, 4 minutes later at 8:00 AM on November 3. The earliest sunset is at 5:00 PM on December 8, and the latest sunset is 4 hours, 3 minutes later at 9:03 PM on June 27.
Daylight saving time (DST) is observed in West Valley City 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 West Valley City, 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 West Valley City experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 4.7 months, from February 21 to July 12, with average wind speeds of more than 6.3 miles per hour. The windiest day of the year is April 5, with an average hourly wind speed of 7.1 miles per hour.
The calmer time of year lasts for 7.3 months, from July 12 to February 21. The calmest day of the year is January 21, with an average hourly wind speed of 5.4 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in West Valley City varies throughout the year.
The wind is most often from the west for 2.1 months, from April 12 to June 14, with a peak percentage of 32% on May 3. The wind is most often from the south for 9.9 months, from June 14 to April 12, with a peak percentage of 46% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in West Valley City 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 West Valley City for general outdoor tourist activities is from mid June to mid September, with a peak score in the third 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 West Valley City for hot-weather activities is from early July to mid August, with a peak score in the last week of July.
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 West Valley City typically lasts for 6.5 months (199 days), from around April 14 to around October 30, rarely starting before March 20 or after May 6, and rarely ending before October 12 or after November 15.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in West Valley City should appear around April 7, only rarely appearing before March 24 or after April 23.
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 3.0 months, from May 15 to August 15, with an average daily incident shortwave energy per square meter above 7.2 kWh. The brightest day of the year is June 29, with an average of 8.4 kWh.
The darker period of the year lasts for 3.5 months, from October 31 to February 15, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest day of the year is December 21, with an average of 2.2 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of West Valley City are 40.692 deg latitude, -112.001 deg longitude, and 4,288 ft elevation.
The topography within 2 miles of West Valley City contains only modest variations in elevation, with a maximum elevation change of 325 feet and an average elevation above sea level of 4,330 feet. Within 10 miles contains only modest variations in elevation (4,170 feet). Within 50 miles also contains extreme variations in elevation (7,503 feet).
The area within 2 miles of West Valley City is covered by artificial surfaces (93%), within 10 miles by shrubs (43%) and artificial surfaces (41%), and within 50 miles by shrubs (41%) and trees (18%).
This report illustrates the typical weather in West Valley City, 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 West Valley City.
For each station, the records are corrected for the elevation difference between that station and West Valley City 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 West Valley City is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between West Valley City and a given station.
The stations contributing to this reconstruction are: Salt Lake City International Airport (92%, 10 kilometers, north); Provo Municipal Airport (7%, 58 kilometers, southeast); and Wendover Airport (1.3%, 172 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .