Climate and Average Weather Year Round in Tieton United States

In Tieton, the summers are warm, dry, and mostly clear and the winters are freezing, snowy, and partly cloudy. Over the course of the year, the temperature typically varies from 23°F to 85°F and is rarely below 11°F or above 95°F.

Based on the tourism score, the best time of year to visit Tieton for warm-weather activities is from early July to mid August.

The hot season lasts for 3.0 months, from June 14 to September 15, with an average daily high temperature above 75°F. The hottest month of the year in Tieton is July, with an average high of 83°F and low of 55°F.

The cold season lasts for 3.0 months, from November 17 to February 17, with an average daily high temperature below 44°F. The coldest month of the year in Tieton is December, with an average low of 24°F and high of 34°F.

In Tieton, 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 Tieton begins around June 8 and lasts for 3.9 months, ending around October 6.

The clearest month of the year in Tieton is July, during which on average the sky is clear, mostly clear, or partly cloudy 77% of the time.

The cloudier part of the year begins around October 6 and lasts for 8.1 months, ending around June 8.

The cloudiest month of the year in Tieton is January, during which on average the sky is overcast or mostly cloudy 65% 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 Tieton varies significantly throughout the year.

The wetter season lasts 5.6 months, from October 16 to April 3, with a greater than 23% chance of a given day being a wet day. The month with the most wet days in Tieton is November, with an average of 12.0 days with at least 0.04 inches of precipitation.

The drier season lasts 6.4 months, from April 3 to October 16. The month with the fewest wet days in Tieton is August, with an average of 1.7 days with at least 0.04 inches of precipitation.

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 Tieton changes throughout the year.

Rain alone is the most common for 11 months, from January 14 to December 7. The month with the most days of rain alone in Tieton is November, with an average of 8.4 days.

Snow alone is the most common for 1.2 months, from December 7 to January 14. The month with the most days of snow alone in Tieton is December, with an average of 4.8 days.

Rainfall

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. Tieton experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.7 months, from September 4 to June 24, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Tieton is November, with an average rainfall of 2.8 inches.

The rainless period of the year lasts for 2.3 months, from June 24 to September 4. The month with the least rain in Tieton is July, with an average rainfall of 0.3 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Tieton experiences extreme seasonal variation in monthly snowfall.

The snowy period of the year lasts for 4.8 months, from October 25 to March 19, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Tieton is December, with an average snowfall of 15.5 inches.

The snowless period of the year lasts for 7.2 months, from March 19 to October 25. The least snow falls around July 7, with an average total accumulation of 0.0 inches.

The length of the day in Tieton varies significantly over the course of the year. In 2024, the shortest day is December 21, with 8 hours, 33 minutes of daylight; the longest day is June 20, with 15 hours, 51 minutes of daylight.

The earliest sunrise is at 5:08 AM on June 15, and the latest sunrise is 2 hours, 39 minutes later at 7:47 AM on December 31. The earliest sunset is at 4:14 PM on December 10, and the latest sunset is 4 hours, 46 minutes later at 9:00 PM on June 25.

Daylight saving time (DST) is observed in Tieton during 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3.

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The perceived humidity level in Tieton, 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.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Tieton experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.7 months, from February 26 to August 17, with average wind speeds of more than 5.7 miles per hour. The windiest month of the year in Tieton is June, with an average hourly wind speed of 6.3 miles per hour.

The calmer time of year lasts for 6.3 months, from August 17 to February 26. The calmest month of the year in Tieton is December, with an average hourly wind speed of 5.2 miles per hour.

The predominant average hourly wind direction in Tieton is from the west throughout the year.

To characterize how pleasant the weather is in Tieton 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 Tieton for general outdoor tourist activities is from early July to mid August, with a peak score in the last week of July.

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 Tieton for hot-weather activities is from mid July to mid August, with a peak score in the last week of July.

Methodology

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.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Tieton typically lasts for 5.3 months (161 days), from around May 2 to around October 10, rarely starting before April 10 or after May 20, and rarely ending before September 21 or after October 30.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Tieton should appear around April 24, only rarely appearing before April 9 or after May 10.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

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 3.2 months, from May 13 to August 20, with an average daily incident shortwave energy per square meter above 6.5 kWh. The brightest month of the year in Tieton is July, with an average of 7.7 kWh.

The darker period of the year lasts for 3.8 months, from October 25 to February 17, with an average daily incident shortwave energy per square meter below 2.5 kWh. The darkest month of the year in Tieton is December, with an average of 1.2 kWh.

For the purposes of this report, the geographical coordinates of Tieton are 46.702 deg latitude, -120.755 deg longitude, and 1,916 ft elevation.

The topography within 2 miles of Tieton contains significant variations in elevation, with a maximum elevation change of 614 feet and an average elevation above sea level of 2,008 feet. Within 10 miles contains significant variations in elevation (3,950 feet). Within 50 miles also contains extreme variations in elevation (14,003 feet).

The area within 2 miles of Tieton is covered by cropland (76%) and shrubs (18%), within 10 miles by shrubs (71%) and cropland (24%), and within 50 miles by shrubs (49%) and trees (33%).