Average Weather in Billings Montana, United States
Billings has a cold desert climate. The temperature typically varies from 20°F to 90°F over the course of the year, and is rarely below -2°F or above 98°F.
The hot season lasts for 89 days, from June 14 to September 11, with an average daily high temperature above 78°F. The hottest day of the year is July 27, with an average high of 90°F and low of 63°F.
The cold season lasts for 103 days, from November 17 to February 28, with an average daily high temperature below 47°F. The coldest day of the year is January 1, with an average low of 20°F and high of 36°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
The length of the day in Billings varies significantly over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 40 minutes of daylight; the longest day is June 21, with 15 hours, 43 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:23 AM on June 15, and the latest sunrise is 2 hours, 35 minutes later at 7:58 AM on November 4. The earliest sunset is at 4:29 PM on December 10, and the latest sunset is 4 hours, 39 minutes later at 9:08 PM on June 26.
Daylight saving time (DST) is observed in Billings during 2017, starting in the spring on March 12, lasting 237 days, and ending in the fall on November 5.
Sunrise & Sunset with Twilight and Daylight Saving Time
In Billings, 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 Billings begins around June 9 and lasts for 123 days, ending around October 10. On July 26, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 77% of the time, and overcast or mostly cloudy 23% of the time.
The cloudier part of the year begins around October 10 and lasts for 242 days, ending around June 9. On March 20, the cloudiest day of the year, the sky is overcast or mostly cloudy 62% of the time, and clear, mostly clear, or partly cloudy 38% 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 Billings varies throughout the year.
The wetter season lasts 93 days, from April 10 to July 12, with a greater than 17% chance of a given day being a wet day. The chance of a wet day peaks at 29% on June 7.
The drier season lasts 272 days, from July 12 to April 10. The smallest chance of a wet day is 4% on February 8.
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 Billings changes throughout the year.
Rain alone is the most common for 290 days, from February 4 to February 16 and from February 23 to November 28. The highest chance of a day with rain alone is 29% on June 7.
Snow alone is the most common for 75 days, from February 16 to February 23 and from November 28 to February 4. The highest chance of a day with snow alone is 4% on January 5.
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 in the year. Billings experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 218 days, from March 25 to October 29, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around May 25, with an average total accumulation of 2.0 inches.
The rainless period of the year lasts for 147 days, from October 29 to March 25. The least rain falls around January 23, with and average total accumulation of 0.1 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in Billings does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.
Average Liquid-Equivalent Monthly Snowfall
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 Billings, 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
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 Billings experiences mildly seasonal variation over the course of the year.
The windier part of the year lasts for 217 days, from October 8 to May 13, with average wind speeds of more than 4.9 miles per hour. The windiest day of the year is January 18, with an average hourly wind speed of 5.8 miles per hour.
The calmer time of year lasts for 148 days, from May 13 to October 8. The calmest day of the year is July 29, with an average hourly wind speed of 3.9 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Billings varies throughout the year.
The wind is most often from the north for 20 days, from July 7 to July 27, with a peak percentage of 29% on July 19. The wind is most often from the east for 9 days, from July 27 to August 5, with a peak percentage of 29% on July 31. The wind is most often from the west for 336 days, from August 5 to July 7, with a peak percentage of 61% on January 18.
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 very significant seasonal variation over the course of the year.
The brighter period of the year lasts for 99 days, from May 14 to August 21, with an average daily incident shortwave energy per square meter above 6.4 kWh. The brightest day of the year is July 3, with an average of 7.6 kWh.
The darker period of the year lasts for 110 days, from October 28 to February 15, with an average daily incident shortwave energy per square meter below 2.7 kWh. The darkest day of the year is December 24, with an average of 1.5 kWh.
Average Daily Incident Shortwave Solar Energy
The area within 2 miles of Billings is covered by artificial surfaces (60%) and shrubs (33%), within 10 miles by grassland (60%) and cropland (15%), and within 50 miles by grassland (66%) and shrubs (17%).
The topography within 2 miles of Billings contains significant variations in elevation, with a maximum elevation change of 541 feet, and an average elevation above sea level of 3,176 feet. Within 10 miles contains very significant variations in elevation (1,079 feet). Within 50 miles contains extreme variations in elevation (6,047 feet).
This report illustrates the typical weather in Billings, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Billings.
For each station, the records are are corrected for the elevation difference between that station and Billings 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 Billings is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Billings and a given station.
The stations contributing to this reconstruction are: Logan International Airport (93%, 4.2 kilometers, northwest), South Big Horn County Airport (2.4%, 145 kilometers, south), Yellowstone Regional Airport (2.2%, 147 kilometers, south), and Sheridan County Airport (2.0%, 165 kilometers, southeast).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .