Average Weather in Mountain Home Idaho, United States
In Mountain Home, the summers are short, hot, arid, and mostly clear and the winters are freezing, dry, and partly cloudy. Over the course of the year, the temperature typically varies from 22°F to 94°F and is rarely below 8°F or above 101°F.
Based on the tourism score, the best time of year to visit Mountain Home for warm-weather activities is from late June to late August.
The hot season lasts for 2.9 months, from June 14 to September 12, with an average daily high temperature above 82°F. The hottest day of the year is July 27, with an average high of 94°F and low of 61°F.
The cold season lasts for 3.1 months, from November 18 to February 21, with an average daily high temperature below 46°F. The coldest day of the year is December 31, with an average low of 22°F and high of 34°F.
Average High and Low Temperature
Average Hourly Temperature
Ivankovci, Macedonia (6,006 miles away); Hekimhan, Turkey (6,546 miles); and Pasragad Branch, Iran (6,969 miles) are the far-away foreign places with temperatures most similar to Mountain Home (view comparison).
In Mountain Home, 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 Mountain Home begins around June 9 and lasts for 4.1 months, ending around October 13. On July 28, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 84% of the time, and overcast or mostly cloudy 16% of the time.
The cloudier part of the year begins around October 13 and lasts for 7.9 months, ending around June 9. On March 1, the cloudiest day of the year, the sky is overcast or mostly cloudy 56% of the time, and clear, mostly clear, or partly cloudy 44% 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 Mountain Home varies throughout the year.
The wetter season lasts 7.4 months, from October 23 to June 4, with a greater than 14% chance of a given day being a wet day. The chance of a wet day peaks at 24% on December 1.
The drier season lasts 4.6 months, from June 4 to October 23. The smallest chance of a wet day is 3% on July 27.
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 19% on November 11.
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. Mountain Home experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 8.7 months, from September 25 to June 16, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around December 6, with an average total accumulation of 1.2 inches.
The rainless period of the year lasts for 3.3 months, from June 16 to September 25. The least rain falls around August 1, 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. Mountain Home experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 3.4 months, from November 11 to February 22, 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 26, with an average total liquid-equivalent accumulation of 0.4 inches.
The snowless period of the year lasts for 8.7 months, from February 22 to November 11. The least snow falls around July 14, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Mountain Home varies significantly over the course of the year. In 2018, the shortest day is December 21, with 8 hours, 59 minutes of daylight; the longest day is June 21, with 15 hours, 23 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:02 AM on June 14, and the latest sunrise is 2 hours, 18 minutes later at 8:20 AM on November 3. The earliest sunset is at 5:07 PM on December 9, and the latest sunset is 4 hours, 19 minutes later at 9:26 PM on June 26.
Daylight saving time (DST) is observed in Mountain Home 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 Mountain Home, 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 Mountain Home experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 4.8 months, from February 4 to June 30, with average wind speeds of more than 7.4 miles per hour. The windiest day of the year is April 11, with an average hourly wind speed of 8.1 miles per hour.
The calmer time of year lasts for 7.2 months, from June 30 to February 4. The calmest day of the year is August 20, with an average hourly wind speed of 6.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Mountain Home varies throughout the year.
The wind is most often from the west for 8.7 months, from February 27 to November 18, with a peak percentage of 44% on June 3. The wind is most often from the east for 3.3 months, from November 18 to February 27, with a peak percentage of 44% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Mountain Home 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 Mountain Home 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 Mountain Home for hot-weather activities is from mid July to mid August, with a peak score in the last week of July.
The growing season in Mountain Home typically lasts for 5.3 months (162 days), from around May 3 to around October 13, rarely starting before April 15 or after May 27, and rarely ending before September 25 or after November 1.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Mountain Home should appear around April 14, only rarely appearing before April 1 or after May 3.
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 3.2 months, from May 13 to August 20, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest day of the year is July 2, with an average of 8.2 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 3.0 kWh. The darkest day of the year is December 21, with an average of 1.7 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Mountain Home are 43.133 deg latitude, -115.691 deg longitude, and 3,166 ft elevation.
The topography within 2 miles of Mountain Home contains only modest variations in elevation, with a maximum elevation change of 210 feet and an average elevation above sea level of 3,160 feet. Within 10 miles contains only modest variations in elevation (2,333 feet). Within 50 miles contains large variations in elevation (7,812 feet).
The area within 2 miles of Mountain Home is covered by shrubs (44%), artificial surfaces (34%), and cropland (17%), within 10 miles by shrubs (47%) and grassland (38%), and within 50 miles by shrubs (61%) and grassland (25%).
This report illustrates the typical weather in Mountain Home, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Mountain Home.
For each station, the records are corrected for the elevation difference between that station and Mountain Home 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 Mountain Home is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Mountain Home and a given station.
The stations contributing to this reconstruction are: Mountain Home Air Force Base (78%, 17 kilometers, southwest); Boise Air Terminal (11%, 66 kilometers, northwest); Jerome County Airport (4.8%, 110 kilometers, southeast); Friedman Memorial Airport (3.7%, 120 kilometers, east); and Stanley, Stanley Ranger Station (2.7%, 131 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .