Average Weather in Fort Hall Idaho, United States
In Fort Hall, the summers are hot and mostly clear, the winters are freezing and partly cloudy, and it is dry year round. Over the course of the year, the temperature typically varies from 17°F to 89°F and is rarely below -1°F or above 96°F.
Based on the tourism score, the best time of year to visit Fort Hall for warm-weather activities is from late June to late August.
The hot season lasts for 3.0 months, from June 13 to September 14, with an average daily high temperature above 77°F. The hottest day of the year is July 31, with an average high of 89°F and low of 55°F.
The cold season lasts for 3.2 months, from November 20 to February 27, with an average daily high temperature below 43°F. The coldest day of the year is December 30, with an average low of 17°F and high of 31°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 Fort Hall, 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 Fort Hall begins around June 8 and lasts for 4.2 months, ending around October 16. On July 26, 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 16 and lasts for 7.8 months, ending around June 8. On January 10, the cloudiest day of the year, the sky is overcast or mostly cloudy 58% of the time, and clear, mostly clear, or partly cloudy 42% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Fort Hall varies throughout the year.
The wetter season lasts 7.5 months, from October 30 to June 13, with a greater than 15% chance of a given day being a wet day. The chance of a wet day peaks at 23% on May 22.
The drier season lasts 4.5 months, from June 13 to October 30. The smallest chance of a wet day is 7% on July 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 throughout the year is rain alone, with a peak probability of 23% on May 22.
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. Fort Hall experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 11 months, from July 31 to June 26, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around May 19, with an average total accumulation of 1.3 inches.
The rainless period of the year lasts for 1.1 months, from June 26 to July 31. The least rain falls around July 8, with an average total accumulation of 0.4 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. Fort Hall experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 3.9 months, from November 9 to March 5, 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 21, with an average total liquid-equivalent accumulation of 0.3 inches.
The snowless period of the year lasts for 8.1 months, from March 5 to November 9. The least snow falls around July 27, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Fort Hall varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 0 minutes of daylight; the longest day is June 21, with 15 hours, 22 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:49 AM on June 14, and the latest sunrise is 2 hours, 17 minutes later at 8:07 AM on November 3. The earliest sunset is at 4:54 PM on December 9, and the latest sunset is 4 hours, 18 minutes later at 9:13 PM on June 26.
Daylight saving time (DST) is observed in Fort Hall 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 Fort Hall, 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
The average hourly wind speed in Fort Hall experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 3.2 months, from February 8 to May 14, with average wind speeds of more than 8.5 miles per hour. The windiest day of the year is March 29, with an average hourly wind speed of 9.6 miles per hour.
The calmer time of year lasts for 8.8 months, from May 14 to February 8. The calmest day of the year is August 4, with an average hourly wind speed of 7.3 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Fort Hall varies throughout the year.
The wind is most often from the west for 4.2 months, from March 21 to July 26, with a peak percentage of 46% on June 21. The wind is most often from the south for 7.8 months, from July 26 to March 21, with a peak percentage of 52% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Fort Hall 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 Fort Hall for general outdoor tourist activities is from late June to late 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 Fort Hall 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 Fort Hall typically lasts for 4.4 months (135 days), from around May 11 to around September 24, rarely starting before April 24 or after May 30, and rarely ending before September 2 or after October 18.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Fort Hall should appear around April 23, only rarely appearing before April 9 or after May 11.
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 3.1 months, from May 17 to August 19, with an average daily incident shortwave energy per square meter above 7.0 kWh. The brightest day of the year is June 29, with an average of 8.2 kWh.
The darker period of the year lasts for 3.5 months, from October 30 to February 14, with an average daily incident shortwave energy per square meter below 3.1 kWh. The darkest day of the year is December 21, with an average of 1.8 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Fort Hall are 43.033 deg latitude, -112.438 deg longitude, and 4,442 ft elevation.
The topography within 2 miles of Fort Hall is essentially flat, with a maximum elevation change of 79 feet and an average elevation above sea level of 4,445 feet. Within 10 miles is essentially flat (2,241 feet). Within 50 miles contains large variations in elevation (5,052 feet).
The area within 2 miles of Fort Hall is covered by cropland (85%) and grassland (11%), within 10 miles by cropland (53%) and shrubs (26%), and within 50 miles by shrubs (60%) and cropland (23%).
This report illustrates the typical weather in Fort Hall, 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 Fort Hall.
For each station, the records are corrected for the elevation difference between that station and Fort Hall 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 Fort Hall is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Fort Hall and a given station.
The stations contributing to this reconstruction are: Pocatello Regional Airport (85%, 17 kilometers, southwest); Fanning Field (12%, 62 kilometers, northeast); and Afton Municipal Airport (3.5%, 127 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .