Climate and Average Weather Year Round in Logan Utah, United States

In Logan, the summers are hot, dry, and mostly clear and the winters are freezing, snowy, and partly cloudy. Over the course of the year, the temperature typically varies from 16°F to 90°F and is rarely below 1°F or above 96°F.

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

The hot season lasts for 3.1 months, from June 11 to September 13, with an average daily high temperature above 78°F. The hottest month of the year in Logan is July, with an average high of 89°F and low of 54°F.

The cold season lasts for 3.1 months, from November 23 to February 27, with an average daily high temperature below 42°F. The coldest month of the year in Logan is January, with an average low of 16°F and high of 31°F.

In Logan, 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 Logan begins around June 3 and lasts for 4.5 months, ending around October 20.

The clearest month of the year in Logan is July, during which on average the sky is clear, mostly clear, or partly cloudy 79% of the time.

The cloudier part of the year begins around October 20 and lasts for 7.5 months, ending around June 3.

The cloudiest month of the year in Logan is February, during which on average the sky is overcast or mostly cloudy 54% 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 Logan varies throughout the year.

The wetter season lasts 8.7 months, from September 20 to June 10, with a greater than 17% chance of a given day being a wet day. The month with the most wet days in Logan is May, with an average of 7.6 days with at least 0.04 inches of precipitation.

The drier season lasts 3.3 months, from June 10 to September 20. The month with the fewest wet days in Logan is July, with an average of 2.8 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 Logan changes throughout the year.

Rain alone is the most common for 10 months, from February 9 to December 22. The month with the most days of rain alone in Logan is May, with an average of 7.5 days.

Mixed snow and rain is the most common for 1.2 months, from January 4 to February 9. The month with the most days of mixed snow and rain in Logan is January, with an average of 2.2 days.

Snow alone is the most common for 1.9 weeks, from December 22 to January 4. The month with the most days of snow alone in Logan is January, with an average of 2.1 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. Logan experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Logan. The month with the most rain in Logan is May, with an average rainfall of 1.8 inches.

The month with the least rain in Logan is July, with an average rainfall of 0.5 inches.

Snowfall

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

The snowy period of the year lasts for 5.3 months, from October 25 to April 4, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Logan is January, with an average snowfall of 5.1 inches.

The snowless period of the year lasts for 6.7 months, from April 4 to October 25. The least snow falls around August 3, with an average total accumulation of 0.0 inches.

The length of the day in Logan varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 9 minutes of daylight; the longest day is June 20, with 15 hours, 13 minutes of daylight.

The earliest sunrise is at 5:52 AM on June 14, and the latest sunrise is 2 hours, 9 minutes later at 8:01 AM on November 2. The earliest sunset is at 4:56 PM on December 8, and the latest sunset is 4 hours, 10 minutes later at 9:06 PM on June 26.

Daylight saving time (DST) is observed in Logan 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 Logan, 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 Logan experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 3.1 months, from February 8 to May 12, with average wind speeds of more than 5.9 miles per hour. The windiest month of the year in Logan is March, with an average hourly wind speed of 6.5 miles per hour.

The calmer time of year lasts for 8.9 months, from May 12 to February 8. The calmest month of the year in Logan is August, with an average hourly wind speed of 5.4 miles per hour.

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

The wind is most often from the west for 6.9 months, from March 16 to October 12, with a peak percentage of 40% on May 9. The wind is most often from the south for 5.1 months, from October 12 to March 16, with a peak percentage of 51% on January 1.

To characterize how pleasant the weather is in Logan 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 Logan 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 Logan 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 Logan typically lasts for 4.6 months (140 days), from around May 11 to around September 28, rarely starting before April 21 or after May 30, and rarely ending before September 11 or after October 16.

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 Logan should appear around April 21, only rarely appearing before April 7 or after May 8.

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 3.0 months, from May 17 to August 16, with an average daily incident shortwave energy per square meter above 7.1 kWh. The brightest month of the year in Logan is June, with an average of 8.1 kWh.

The darker period of the year lasts for 3.5 months, from October 29 to February 14, with an average daily incident shortwave energy per square meter below 3.3 kWh. The darkest month of the year in Logan is December, with an average of 2.1 kWh.

For the purposes of this report, the geographical coordinates of Logan are 41.735 deg latitude, -111.834 deg longitude, and 4,531 ft elevation.

The topography within 2 miles of Logan contains significant variations in elevation, with a maximum elevation change of 518 feet and an average elevation above sea level of 4,545 feet. Within 10 miles contains significant variations in elevation (5,276 feet). Within 50 miles also contains extreme variations in elevation (5,732 feet).

The area within 2 miles of Logan is covered by artificial surfaces (80%) and cropland (19%), within 10 miles by cropland (40%) and shrubs (28%), and within 50 miles by shrubs (49%) and cropland (16%).