Average Weather in Hiratachō Japan
In Hiratachō, the summers are short, warm, oppressive, and mostly cloudy; the winters are very cold, windy, and partly cloudy; and it is wet year round. Over the course of the year, the temperature typically varies from 37°F to 86°F and is rarely below 32°F or above 91°F.
Based on the tourism score, the best times of year to visit Hiratachō for warm-weather activities are from late May to mid June and from late August to mid October.
The hot season lasts for 2.7 months, from June 29 to September 19, with an average daily high temperature above 77°F. The hottest day of the year is August 6, with an average high of 86°F and low of 76°F.
The cool season lasts for 3.4 months, from December 7 to March 19, with an average daily high temperature below 53°F. The coldest day of the year is January 27, with an average low of 37°F and high of 45°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
In Hiratachō, 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 Hiratachō begins around September 5 and lasts for 7.8 months, ending around April 30. On October 24, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 67% of the time, and overcast or mostly cloudy 33% of the time.
The cloudier part of the year begins around April 30 and lasts for 4.2 months, ending around September 5. On July 2, the cloudiest day of the year, the sky is overcast or mostly cloudy 69% of the time, and clear, mostly clear, or partly cloudy 31% 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 Hiratachō varies throughout the year.
The wetter season lasts 3.2 months, from June 15 to September 21, with a greater than 40% chance of a given day being a wet day. The chance of a wet day peaks at 53% on July 3.
The drier season lasts 8.8 months, from September 21 to June 15. The smallest chance of a wet day is 27% on October 24.
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 53% on July 3.
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. Hiratachō experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year in Hiratachō. The most rain falls during the 31 days centered around July 1, with an average total accumulation of 8.8 inches.
The least rain falls around January 30, with an average total accumulation of 2.7 inches.
Average Monthly Rainfall
The length of the day in Hiratachō varies significantly over the course of the year. In 2018, the shortest day is December 22, with 9 hours, 46 minutes of daylight; the longest day is June 21, with 14 hours, 33 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:52 AM on June 13, and the latest sunrise is 2 hours, 25 minutes later at 7:18 AM on January 7. The earliest sunset is at 4:55 PM on December 6, and the latest sunset is 2 hours, 32 minutes later at 7:27 PM on June 29.
Daylight saving time (DST) is not observed in Hiratachō during 2018.
Sunrise & Sunset with Twilight
Hiratachō experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.6 months, from June 10 to September 30, 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 6, with muggy conditions 98% of the time.
The least muggy day of the year is December 13, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in Hiratachō experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.5 months, from October 28 to April 14, with average wind speeds of more than 12.8 miles per hour. The windiest day of the year is December 26, with an average hourly wind speed of 16.1 miles per hour.
The calmer time of year lasts for 6.5 months, from April 14 to October 28. The calmest day of the year is June 15, with an average hourly wind speed of 9.6 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Hiratachō varies throughout the year.
The wind is most often from the west for 1.9 months, from June 7 to August 3 and for 7.2 months, from October 25 to June 1, with a peak percentage of 38% on July 11. The wind is most often from the east for 1.8 months, from August 14 to October 7, with a peak percentage of 36% on September 26. The wind is most often from the north for 2.6 weeks, from October 7 to October 25, with a peak percentage of 34% on October 7.
Hiratachō 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 2.4 months, from July 16 to September 30, with an average temperature above 75°F. The day of the year with the warmest water is August 17, with an average temperature of 80°F.
The time of year with cooler water lasts for 4.0 months, from January 1 to May 2, with an average temperature below 60°F. The day of the year with the coolest water is March 1, with an average temperature of 54°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Hiratachō 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 times of year to visit Hiratachō for general outdoor tourist activities are from late May to mid June and from late August to mid October, with a peak score in the last week of September.
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 Hiratachō for hot-weather activities is from mid July to early September, with a peak score in the second week of August.
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.
The growing season in Hiratachō typically lasts for 10 months (314 days), from around February 20 to around January 1, rarely starting after March 17, or ending before December 17.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Hiratachō should appear around April 4, only rarely appearing before March 22 or after April 15.
Growing Degree Days
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 4.3 months, from April 16 to August 24, with an average daily incident shortwave energy per square meter above 5.5 kWh. The brightest day of the year is June 1, with an average of 6.3 kWh.
The darker period of the year lasts for 2.9 months, from November 13 to February 11, with an average daily incident shortwave energy per square meter below 2.9 kWh. The darkest day of the year is December 26, with an average of 2.0 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Hiratachō are 35.433 deg latitude, 132.817 deg longitude, and 16 ft elevation.
The topography within 2 miles of Hiratachō contains very significant variations in elevation, with a maximum elevation change of 1,253 feet and an average elevation above sea level of 67 feet. Within 10 miles also contains very significant variations in elevation (1,719 feet). Within 50 miles contains very significant variations in elevation (5,577 feet).
The area within 2 miles of Hiratachō is covered by cropland (69%) and trees (22%), within 10 miles by water (47%) and trees (35%), and within 50 miles by water (66%) and trees (31%).
This report illustrates the typical weather in Hiratachō, 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 Hiratachō.
For each station, the records are corrected for the elevation difference between that station and Hiratachō 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 Hiratachō is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Hiratachō and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .