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Average Weather in Komatsu Japan

In Komatsu, the temperature typically varies from 32°F to 87°F over the course of the year, and is rarely below 27°F or above 94°F.

The hot season lasts for 2.8 months, from June 26 to September 20, with an average daily high temperature above 78°F. The hottest day of the year is August 9, with an average high of 87°F and low of 74°F.

The cool season lasts for 3.4 months, from December 7 to March 18, with an average daily high temperature below 52°F. The coldest day of the year is January 28, with an average low of 32°F and high of 43°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature with percentile bands, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecchillychillycoldcoldcoolcoolcomfortablecomfortablewarmwarmhothot
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Sun

The length of the day in Komatsu varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 41 minutes of daylight; the longest day is June 21, with 14 hours, 39 minutes of daylight.

Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 4:35 AM on June 13, and the latest sunrise is 2 hours, 31 minutes later at 7:06 AM on January 6. The earliest sunset is at 4:38 PM on December 6, and the latest sunset is 2 hours, 37 minutes later at 7:16 PM on June 29.

Daylight saving time (DST) is not observed in Komatsu during 2017.

Sunrise & Sunset with Twilight

The solar day over the course of the year 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Clouds

In Komatsu, 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 Komatsu begins around July 31 and lasts for 4.5 months, ending around December 14. On October 24, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 61% of the time, and overcast or mostly cloudy 39% of the time.

The cloudier part of the year begins around December 14 and lasts for 7.5 months, ending around July 31. On January 20, the cloudiest day of the year, the sky is overcast or mostly cloudy 72% of the time, and clear, mostly clear, or partly cloudy 28% of the time.

Cloud Cover

clearerclearercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJan 2072%Jan 2072%Oct 2439%Oct 2439%Jul 3156%Jul 3156%Dec 1456%Dec 1456%overcastovercastmostly cloudymostly cloudymostly clearmostly clearclearclear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Komatsu varies significantly throughout the year.

The wetter season lasts 8.6 months, from June 22 to March 9, with a greater than 43% chance of a given day being a wet day. The chance of a wet day peaks at 59% on December 26.

The drier season lasts 3.4 months, from March 9 to June 22. The smallest chance of a wet day is 27% on June 2.

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 54% on November 30.

Daily Chance of Precipitation

wetwetwetwetdrydry0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecDec 2659%Dec 2659%Jun 227%Jun 227%Jun 2244%Jun 2244%Mar 943%Mar 943%mixedmixedrainrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

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 in the year. Komatsu experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Komatsu. The most rain falls during the 31 days centered around July 4, with an average total accumulation of 8.0 inches.

The least rain falls around February 21, with and average total accumulation of 4.1 inches.

Average Monthly Rainfall

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Snowfall

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 in the year. Komatsu experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 3.2 months, from December 3 to March 10, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 27, with an average total liquid-equivalent accumulation of 0.5 inches.

The snowless period of the year lasts for 8.8 months, from March 10 to December 3. The least snow falls around July 27, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

The average liquid-equivalent snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.

Humidity

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.

Komatsu experiences very significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.4 months, from June 14 to September 26, during which time the comfort level is muggy, oppressive, or miserable at least 25% of the time. The muggiest day of the year is August 4, with muggy conditions 96% of the time.

The least muggy day of the year is December 9, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

muggymuggy0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecDec 90%Dec 90%96%Aug 496%Aug 4Jun 1425%Jun 1425%Sep 2625%Sep 2625%miserablemiserableoppressiveoppressivemuggymuggyhumidhumiddrydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Komatsu experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 6.1 months, from October 17 to April 20, with average wind speeds of more than 5.7 miles per hour. The windiest day of the year is December 26, with an average hourly wind speed of 7.2 miles per hour.

The calmer time of year lasts for 5.9 months, from April 20 to October 17. The calmest day of the year is August 3, with an average hourly wind speed of 4.2 miles per hour.

Average Wind Speed

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

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

The wind is most often from the south for 4.6 months, from April 6 to August 26, with a peak percentage of 42% on May 7. The wind is most often from the north for 3.1 months, from August 26 to November 29 and for 3.5 months, from December 20 to April 6, with a peak percentage of 45% on February 15. The wind is most often from the west for 3.0 weeks, from November 29 to December 20, with a peak percentage of 37% on December 17.

Wind Direction

NNSSNNWWNN0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecwestwestsouthsoutheasteastnorthnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Komatsu is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.5 months, from July 15 to October 1, with an average temperature above 74°F. The day of the year with the warmest water is August 19, with an average temperature of 80°F.

The time of year with cooler water lasts for 3.9 months, from January 5 to May 2, with an average temperature below 57°F. The day of the year with the coolest water is March 11, with an average temperature of 51°F.

Average Water Temperature

The daily average water temperature (purple line) with percentile bands, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.5 months, from April 14 to August 28, with an average daily incident shortwave energy per square meter above 5.3 kWh. The brightest day of the year is June 2, with an average of 6.3 kWh.

The darker period of the year lasts for 3.1 months, from November 11 to February 13, with an average daily incident shortwave energy per square meter below 2.6 kWh. The darkest day of the year is December 26, with an average of 1.7 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Komatsu are 36.403 deg latitude, 136.451 deg longitude, and 10 ft elevation (map ).

The topography within 2 miles of Komatsu is essentially flat, with a maximum elevation change of 85 feet, and an average elevation above sea level of 7 feet. Within 10 miles contains large variations in elevation (2,159 feet). Within 50 miles contains extreme variations in elevation (8,858 feet).

The area within 2 miles of Komatsu is covered by cropland (64%), trees (14%), and grassland (13%), within 10 miles by water (46%) and trees (29%), and within 50 miles by water (56%) and trees (35%).

Data Sources

This report illustrates the typical weather in Komatsu, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Komatsu.

For each station, the records are corrected for the elevation difference between that station and Komatsu 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 Komatsu is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Komatsu and a given station.

The stations contributing to this reconstruction are: Komatsu Airport (99%, 4.0 kilometers, west) and Gifu Ab (0.6%, 118 kilometers, south).

Other Data

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 .