Average Weather in South Wenatchee Washington, United States
In South Wenatchee, the summers are warm, dry, and mostly clear and the winters are freezing and partly cloudy. Over the course of the year, the temperature typically varies from 25°F to 89°F and is rarely below 12°F or above 98°F.
The hot season lasts for 3.1 months, from June 12 to September 14, with an average daily high temperature above 78°F. The hottest day of the year is August 1, with an average high of 89°F and low of 64°F.
The cold season lasts for 3.0 months, from November 18 to February 19, with an average daily high temperature below 44°F. The coldest day of the year is December 30, with an average low of 25°F and high of 33°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 South Wenatchee, 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 South Wenatchee begins around June 9 and lasts for 3.9 months, ending around October 7. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 81% of the time, and overcast or mostly cloudy 19% of the time.
The cloudier part of the year begins around October 7 and lasts for 8.1 months, ending around June 9. On January 15, the cloudiest day of the year, the sky is overcast or mostly cloudy 66% of the time, and clear, mostly clear, or partly cloudy 34% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in South Wenatchee varies significantly throughout the year.
The wetter season lasts 5.2 months, from October 17 to March 24, with a greater than 20% chance of a given day being a wet day. The chance of a wet day peaks at 36% on November 28.
The drier season lasts 6.8 months, from March 24 to October 17. The smallest chance of a wet day is 4% 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 in South Wenatchee changes throughout the year.
Rain alone is the most common for 11 months, from January 14 to December 12. The highest chance of a day with rain alone is 30% on November 10.
Snow alone is the most common for 1.1 months, from December 12 to January 14. The highest chance of a day with snow alone is 16% on December 28.
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. South Wenatchee experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 9.2 months, from September 16 to June 21, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around November 15, with an average total accumulation of 2.1 inches.
The rainless period of the year lasts for 2.8 months, from June 21 to September 16. The least rain falls around August 3, with an average total accumulation of 0.2 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. South Wenatchee experiences significant seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 4.4 months, from November 1 to March 13, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 31, with an average total liquid-equivalent accumulation of 1.2 inches.
The snowless period of the year lasts for 7.6 months, from March 13 to November 1. The least snow falls around July 18, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in South Wenatchee varies significantly over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 27 minutes of daylight; the longest day is June 21, with 15 hours, 57 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:03 AM on June 15, and the latest sunrise is 2 hours, 46 minutes later at 7:49 AM on November 4. The earliest sunset is at 4:10 PM on December 10, and the latest sunset is 4 hours, 52 minutes later at 9:02 PM on June 25.
Daylight saving time (DST) is observed in South Wenatchee during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.
Sunrise & Sunset with Twilight and Daylight Saving Time
The perceived humidity level in South Wenatchee, 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
Average Wind Speed
The predominant average hourly wind direction in South Wenatchee varies throughout the year.
The wind is most often from the west for 9.4 months, from February 21 to December 3, with a peak percentage of 70% on June 23. The wind is most often from the north for 2.6 months, from December 3 to February 21, with a peak percentage of 43% on January 1.
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 3.3 months, from May 13 to August 21, with an average daily incident shortwave energy per square meter above 6.3 kWh. The brightest day of the year is July 13, with an average of 7.7 kWh.
The darker period of the year lasts for 3.7 months, from October 26 to February 17, with an average daily incident shortwave energy per square meter below 2.5 kWh. The darkest day of the year is December 23, with an average of 1.1 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of South Wenatchee are 47.390 deg latitude, -120.290 deg longitude, and 1,102 ft elevation.
The topography within 2 miles of South Wenatchee contains very significant variations in elevation, with a maximum elevation change of 1,785 feet and an average elevation above sea level of 1,136 feet. Within 10 miles contains very significant variations in elevation (6,155 feet). Within 50 miles also contains extreme variations in elevation (8,816 feet).
The area within 2 miles of South Wenatchee is covered by artificial surfaces (39%) and shrubs (38%), within 10 miles by shrubs (50%) and trees (13%), and within 50 miles by shrubs (49%) and trees (21%).
This report illustrates the typical weather in South Wenatchee, 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 South Wenatchee.
For each station, the records are corrected for the elevation difference between that station and South Wenatchee 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 South Wenatchee is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between South Wenatchee and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .