Climate and Average Weather Year Round in Stanley United States

In Stanley, the summers are warm; the winters are frigid, snowy, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 1°F to 81°F and is rarely below -21°F or above 92°F.

Based on the tourism score, the best time of year to visit Stanley for warm-weather activities is from late June to mid August.

The warm season lasts for 3.8 months, from May 23 to September 16, with an average daily high temperature above 69°F. The hottest month of the year in Stanley is July, with an average high of 80°F and low of 56°F.

The cold season lasts for 3.5 months, from November 22 to March 7, with an average daily high temperature below 32°F. The coldest month of the year in Stanley is January, with an average low of 2°F and high of 20°F.

In Stanley, 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 Stanley begins around June 6 and lasts for 4.2 months, ending around October 11.

The clearest month of the year in Stanley is July, during which on average the sky is clear, mostly clear, or partly cloudy 72% of the time.

The cloudier part of the year begins around October 11 and lasts for 7.8 months, ending around June 6.

The cloudiest month of the year in Stanley is January, during which on average the sky is overcast or mostly cloudy 63% 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 Stanley varies significantly throughout the year.

The wetter season lasts 3.8 months, from May 5 to August 30, with a greater than 19% chance of a given day being a wet day. The month with the most wet days in Stanley is June, with an average of 9.9 days with at least 0.04 inches of precipitation.

The drier season lasts 8.2 months, from August 30 to May 5. The month with the fewest wet days in Stanley is February, with an average of 1.1 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 Stanley changes throughout the year.

Rain alone is the most common for 7.4 months, from March 26 to November 5. The month with the most days of rain alone in Stanley is June, with an average of 9.9 days.

Snow alone is the most common for 4.6 months, from November 5 to March 26. The month with the most days of snow alone in Stanley is January, with an average of 1.6 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. Stanley experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.7 months, from April 6 to October 28, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Stanley is June, with an average rainfall of 2.8 inches.

The rainless period of the year lasts for 5.3 months, from October 28 to April 6. The month with the least rain in Stanley is December, with an average rainfall of 0.0 inches.

Snowfall

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

The snowy period of the year lasts for 7.0 months, from October 11 to May 10, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Stanley is November, with an average snowfall of 2.5 inches.

The snowless period of the year lasts for 5.0 months, from May 10 to October 11. The least snow falls around July 20, with an average total accumulation of 0.0 inches.

The length of the day in Stanley varies extremely over the course of the year. In 2024, the shortest day is December 21, with 8 hours, 20 minutes of daylight; the longest day is June 20, with 16 hours, 6 minutes of daylight.

The earliest sunrise is at 5:47 AM on June 15, and the latest sunrise is 2 hours, 53 minutes later at 8:40 AM on December 31. The earliest sunset is at 4:54 PM on December 10, and the latest sunset is 5 hours, 0 minutes later at 9:54 PM on June 24.

Daylight saving time (DST) is observed in Stanley 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.

Stanley experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 2.5 months, from June 12 to August 26, during which time the comfort level is muggy, oppressive, or miserable at least 4% of the time. The month with the most muggy days in Stanley is July, with 4.8 days that are muggy or worse.

The least muggy day of the year is February 28, when muggy conditions are essentially unheard of.

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 Stanley experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 8.9 months, from September 12 to June 8, with average wind speeds of more than 11.1 miles per hour. The windiest month of the year in Stanley is March, with an average hourly wind speed of 12.5 miles per hour.

The calmer time of year lasts for 3.1 months, from June 8 to September 12. The calmest month of the year in Stanley is July, with an average hourly wind speed of 9.9 miles per hour.

The predominant average hourly wind direction in Stanley varies throughout the year.

The wind is most often from the north for 2.0 months, from March 23 to May 22, with a peak percentage of 29% on April 28. The wind is most often from the south for 1.7 weeks, from May 22 to June 3 and for 1.2 months, from July 20 to August 25, with a peak percentage of 30% on August 18. The wind is most often from the west for 1.5 months, from June 3 to July 20 and for 6.9 months, from August 25 to March 23, with a peak percentage of 30% on June 22.

To characterize how pleasant the weather is in Stanley 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 Stanley for general outdoor tourist activities is from late June 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 Stanley for hot-weather activities is from early 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 Stanley typically lasts for 4.2 months (129 days), from around May 15 to around September 20, rarely starting before April 29 or after May 30, and rarely ending before September 2 or after October 8.

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 Stanley should appear around May 3, only rarely appearing before April 23 or after May 19.

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 3.5 months, from May 1 to August 18, with an average daily incident shortwave energy per square meter above 6.0 kWh. The brightest month of the year in Stanley is July, with an average of 7.1 kWh.

The darker period of the year lasts for 3.5 months, from October 27 to February 13, with an average daily incident shortwave energy per square meter below 2.4 kWh. The darkest month of the year in Stanley is December, with an average of 1.2 kWh.

For the purposes of this report, the geographical coordinates of Stanley are 48.317 deg latitude, -102.390 deg longitude, and 2,244 ft elevation.

The topography within 2 miles of Stanley contains only modest variations in elevation, with a maximum elevation change of 190 feet and an average elevation above sea level of 2,245 feet. Within 10 miles also contains only modest variations in elevation (423 feet). Within 50 miles contains only modest variations in elevation (1,243 feet).

The area within 2 miles of Stanley is covered by cropland (55%) and grassland (44%), within 10 miles by cropland (58%) and grassland (40%), and within 50 miles by cropland (62%) and grassland (34%).