Climate and Average Weather Year Round in Tsurugi-asahimachi Japan

In Tsurugi-asahimachi, the summers are short, warm, muggy, and wet; the winters are very cold, snowy, and windy; and it is mostly cloudy year round. Over the course of the year, the temperature typically varies from 29°F to 85°F and is rarely below 23°F or above 91°F.

Based on the tourism score, the best time of year to visit Tsurugi-asahimachi for warm-weather activities is from mid July to late September.

The warm season lasts for 2.8 months, from June 24 to September 18, with an average daily high temperature above 75°F. The hottest month of the year in Tsurugi-asahimachi is August, with an average high of 84°F and low of 71°F.

The cold season lasts for 3.3 months, from December 6 to March 15, with an average daily high temperature below 47°F. The coldest month of the year in Tsurugi-asahimachi is January, with an average low of 30°F and high of 39°F.

In Tsurugi-asahimachi, 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 Tsurugi-asahimachi begins around July 27 and lasts for 4.4 months, ending around December 7.

The clearest month of the year in Tsurugi-asahimachi is October, during which on average the sky is clear, mostly clear, or partly cloudy 56% of the time.

The cloudier part of the year begins around December 7 and lasts for 7.6 months, ending around July 27.

The cloudiest month of the year in Tsurugi-asahimachi is January, during which on average the sky is overcast or mostly cloudy 73% 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 Tsurugi-asahimachi varies throughout the year.

The wetter season lasts 8.5 months, from June 19 to March 3, with a greater than 42% chance of a given day being a wet day. The month with the most wet days in Tsurugi-asahimachi is December, with an average of 17.3 days with at least 0.04 inches of precipitation.

The drier season lasts 3.5 months, from March 3 to June 19. The month with the fewest wet days in Tsurugi-asahimachi is May, with an average of 9.8 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. The month with the most days of rain alone in Tsurugi-asahimachi is November, with an average of 14.7 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 54% on July 3.

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. Tsurugi-asahimachi experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Tsurugi-asahimachi. The month with the most rain in Tsurugi-asahimachi is July, with an average rainfall of 7.1 inches.

The month with the least rain in Tsurugi-asahimachi is February, with an average rainfall of 3.2 inches.

Snowfall

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

The snowy period of the year lasts for 4.3 months, from November 17 to March 27, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Tsurugi-asahimachi is January, with an average snowfall of 14.7 inches.

The snowless period of the year lasts for 7.7 months, from March 27 to November 17. The least snow falls around July 31, with an average total accumulation of 0.0 inches.

The length of the day in Tsurugi-asahimachi varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 40 minutes of daylight; the longest day is June 21, with 14 hours, 39 minutes of daylight.

The earliest sunrise is at 4:34 AM on June 13, and the latest sunrise is 2 hours, 31 minutes later at 7:05 AM on January 7. The earliest sunset is at 4:37 PM on December 6, and the latest sunset is 2 hours, 38 minutes later at 7:15 PM on June 28.

Daylight saving time (DST) is not observed in Tsurugi-asahimachi during 2024.

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.

Tsurugi-asahimachi experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.2 months, from June 17 to September 22, during which time the comfort level is muggy, oppressive, or miserable at least 24% of the time. The month with the most muggy days in Tsurugi-asahimachi is August, with 27.0 days that are muggy or worse.

The least muggy day of the year is February 23, when muggy conditions are essentially unheard of.

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 Tsurugi-asahimachi experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 6.3 months, from October 25 to May 3, with average wind speeds of more than 9.8 miles per hour. The windiest month of the year in Tsurugi-asahimachi is January, with an average hourly wind speed of 12.0 miles per hour.

The calmer time of year lasts for 5.7 months, from May 3 to October 25. The calmest month of the year in Tsurugi-asahimachi is June, with an average hourly wind speed of 7.6 miles per hour.

The predominant average hourly wind direction in Tsurugi-asahimachi varies throughout the year.

The wind is most often from the north for 3.1 months, from January 1 to April 3 and for 2.8 months, from August 24 to November 18, with a peak percentage of 43% on September 22. The wind is most often from the south for 4.7 months, from April 3 to August 24, with a peak percentage of 42% on May 5. The wind is most often from the west for 1.4 months, from November 18 to December 31, with a peak percentage of 39% on December 26.

Tsurugi-asahimachi 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 September 30, with an average temperature above 74°F. The month of the year in Tsurugi-asahimachi with the warmest water is August, with an average temperature of 80°F.

The time of year with cooler water lasts for 3.9 months, from January 6 to May 2, with an average temperature below 56°F. The month of the year in Tsurugi-asahimachi with the coolest water is March, with an average temperature of 51°F.

To characterize how pleasant the weather is in Tsurugi-asahimachi 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 Tsurugi-asahimachi for general outdoor tourist activities is from mid July to late September, with a peak score in the second week of August.

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 Tsurugi-asahimachi for hot-weather activities is from late July to late August, with a peak score in the second week of August.

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 Tsurugi-asahimachi typically lasts for 7.8 months (238 days), from around April 2 to around November 26, rarely starting before March 17 or after April 18, and rarely ending before November 10 or after December 13.

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 Tsurugi-asahimachi should appear around April 18, only rarely appearing before April 9 or after April 25.

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 4.4 months, from April 13 to August 26, with an average daily incident shortwave energy per square meter above 5.3 kWh. The brightest month of the year in Tsurugi-asahimachi is May, with an average of 6.1 kWh.

The darker period of the year lasts for 3.0 months, from November 10 to February 12, with an average daily incident shortwave energy per square meter below 2.6 kWh. The darkest month of the year in Tsurugi-asahimachi is December, with an average of 1.8 kWh.

For the purposes of this report, the geographical coordinates of Tsurugi-asahimachi are 36.450 deg latitude, 136.633 deg longitude, and 522 ft elevation.

The topography within 2 miles of Tsurugi-asahimachi contains large variations in elevation, with a maximum elevation change of 2,152 feet and an average elevation above sea level of 933 feet. Within 10 miles contains large variations in elevation (4,711 feet). Within 50 miles also contains extreme variations in elevation (8,970 feet).

The area within 2 miles of Tsurugi-asahimachi is covered by trees (88%) and cropland (10%), within 10 miles by trees (65%) and cropland (21%), and within 50 miles by water (49%) and trees (40%).