Average Weather in Inawashiro Japan
In Inawashiro, the summers are warm, humid, wet, and mostly cloudy and the winters are freezing, snowy, and partly cloudy. Over the course of the year, the temperature typically varies from 19°F to 81°F and is rarely below 12°F or above 88°F.
Based on the tourism score, the best time of year to visit Inawashiro for warm-weather activities is from late July to early September.
The warm season lasts for 3.0 months, from June 20 to September 19, with an average daily high temperature above 71°F. The hottest day of the year is August 7, with an average high of 81°F and low of 66°F.
The cold season lasts for 3.4 months, from December 5 to March 17, with an average daily high temperature below 42°F. The coldest day of the year is January 27, with an average low of 19°F and high of 32°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 Inawashiro, 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 Inawashiro begins around September 26 and lasts for 7.0 months, ending around April 25. On November 6, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 57% of the time, and overcast or mostly cloudy 43% of the time.
The cloudier part of the year begins around April 25 and lasts for 5.0 months, ending around September 26. On July 3, 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 Inawashiro varies significantly throughout the year.
The wetter season lasts 3.6 months, from June 10 to September 29, with a greater than 35% chance of a given day being a wet day. The chance of a wet day peaks at 52% on July 4.
The drier season lasts 8.4 months, from September 29 to June 10. The smallest chance of a wet day is 17% on January 23.
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 Inawashiro changes throughout the year.
Rain alone is the most common for 9.6 months, from March 2 to December 18. The highest chance of a day with rain alone is 52% on July 4.
Snow alone is the most common for 2.3 months, from December 18 to February 27. The highest chance of a day with snow alone is 12% on January 22.
Mixed snow and rain is the most common for 3.0 days, from February 27 to March 2. The highest chance of a day with mixed snow and rain is 8% on March 10.
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. Inawashiro experiences extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 11 months, from February 5 to January 6, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around July 9, with an average total accumulation of 6.2 inches.
The rainless period of the year lasts for 1.0 months, from January 6 to February 5. The least rain falls around January 20, with an average total accumulation of 0.4 inches.
Average Monthly Rainfall
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 of the year. Inawashiro experiences significant seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 5.3 months, from November 11 to April 20, 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 15, with an average total liquid-equivalent accumulation of 1.0 inches.
The snowless period of the year lasts for 6.7 months, from April 20 to November 11. The least snow falls around July 30, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Inawashiro varies significantly over the course of the year. In 2018, the shortest day is December 22, with 9 hours, 34 minutes of daylight; the longest day is June 21, with 14 hours, 46 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:17 AM on June 14, and the latest sunrise is 2 hours, 37 minutes later at 6:54 AM on January 6. The earliest sunset is at 4:20 PM on December 7, and the latest sunset is 2 hours, 44 minutes later at 7:04 PM on June 29.
Daylight saving time (DST) is not observed in Inawashiro during 2018.
Sunrise & Sunset with Twilight
Inawashiro experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 2.7 months, from June 26 to September 18, during which time the comfort level is muggy, oppressive, or miserable at least 19% of the time. The muggiest day of the year is August 7, with muggy conditions 75% of the time.
The least muggy day of the year is December 3, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in Inawashiro experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.3 months, from November 25 to May 3, with average wind speeds of more than 7.0 miles per hour. The windiest day of the year is February 8, with an average hourly wind speed of 9.6 miles per hour.
The calmer time of year lasts for 6.7 months, from May 3 to November 25. The calmest day of the year is August 4, with an average hourly wind speed of 4.4 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Inawashiro varies throughout the year.
The wind is most often from the south for 1.2 months, from August 7 to September 12, with a peak percentage of 34% on August 16. The wind is most often from the west for 11 months, from September 12 to August 7, with a peak percentage of 79% on January 1.
Inawashiro 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 2.6 months, from July 16 to October 5, with an average temperature above 70°F. The day of the year with the warmest water is August 21, with an average temperature of 76°F.
The time of year with cooler water lasts for 3.7 months, from January 9 to April 30, with an average temperature below 54°F. The day of the year with the coolest water is March 9, with an average temperature of 48°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Inawashiro 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 Inawashiro for general outdoor tourist activities is from late July to early 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 Inawashiro for hot-weather activities is from late July to mid August, with a peak score in the first 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 Inawashiro typically lasts for 6.1 months (187 days), from around April 22 to around October 26, rarely starting before April 6 or after May 8, and rarely ending before October 9 or after November 12.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Inawashiro should appear around May 6, only rarely appearing before April 29 or after May 14.
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 14 to August 25, with an average daily incident shortwave energy per square meter above 5.2 kWh. The brightest day of the year is June 2, with an average of 6.1 kWh.
The darker period of the year lasts for 3.0 months, from November 10 to February 10, with an average daily incident shortwave energy per square meter below 2.7 kWh. The darkest day of the year is December 26, with an average of 1.8 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Inawashiro are 37.567 deg latitude, 140.117 deg longitude, and 1,900 ft elevation.
The topography within 2 miles of Inawashiro contains very significant variations in elevation, with a maximum elevation change of 1,503 feet and an average elevation above sea level of 1,932 feet. Within 10 miles contains very significant variations in elevation (5,171 feet). Within 50 miles also contains extreme variations in elevation (6,932 feet).
The area within 2 miles of Inawashiro is covered by cropland (59%) and trees (38%), within 10 miles by trees (62%) and water (19%), and within 50 miles by trees (76%) and cropland (18%).
This report illustrates the typical weather in Inawashiro, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Inawashiro.
For each station, the records are corrected for the elevation difference between that station and Inawashiro 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 Inawashiro is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Inawashiro and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .