Climate and Average Weather Year Round in Ichinohe Japan

In Ichinohe, the summers are warm, humid, wet, and mostly cloudy and the winters are freezing, snowy, windy, and partly cloudy. Over the course of the year, the temperature typically varies from 19°F to 80°F and is rarely below 12°F or above 89°F.

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

The warm season lasts for 3.1 months, from June 16 to September 20, with an average daily high temperature above 70°F. The hottest month of the year in Ichinohe is August, with an average high of 79°F and low of 65°F.

The cold season lasts for 3.4 months, from December 2 to March 15, with an average daily high temperature below 40°F. The coldest month of the year in Ichinohe is January, with an average low of 20°F and high of 31°F.

In Ichinohe, 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 Ichinohe begins around September 27 and lasts for 2.5 months, ending around December 11.

The clearest month of the year in Ichinohe is October, during which on average the sky is clear, mostly clear, or partly cloudy 60% of the time.

The cloudier part of the year begins around December 11 and lasts for 9.5 months, ending around September 27.

The cloudiest month of the year in Ichinohe is July, during which on average the sky is overcast or mostly cloudy 58% 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 Ichinohe varies throughout the year.

The wetter season lasts 7.5 months, from April 26 to December 11, with a greater than 31% chance of a given day being a wet day. The month with the most wet days in Ichinohe is September, with an average of 11.7 days with at least 0.04 inches of precipitation.

The drier season lasts 4.5 months, from December 11 to April 26. The month with the fewest wet days in Ichinohe is February, with an average of 6.4 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 Ichinohe changes throughout the year.

Rain alone is the most common for 10.0 months, from February 26 to December 26. The month with the most days of rain alone in Ichinohe is September, with an average of 11.7 days.

Snow alone is the most common for 2.0 months, from December 26 to February 26. The month with the most days of snow alone in Ichinohe is January, with an average of 3.3 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. Ichinohe experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Ichinohe. The month with the most rain in Ichinohe is September, with an average rainfall of 5.5 inches.

The month with the least rain in Ichinohe is January, with an average rainfall of 0.7 inches.

Snowfall

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

The snowy period of the year lasts for 5.1 months, from November 7 to April 10, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Ichinohe is February, with an average snowfall of 8.4 inches.

The snowless period of the year lasts for 6.9 months, from April 10 to November 7. The least snow falls around July 25, with an average total accumulation of 0.0 inches.

The length of the day in Ichinohe varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 18 minutes of daylight; the longest day is June 21, with 15 hours, 2 minutes of daylight.

The earliest sunrise is at 4:04 AM on June 14, and the latest sunrise is 2 hours, 53 minutes later at 6:57 AM on January 5. The earliest sunset is at 4:08 PM on December 7, and the latest sunset is 3 hours, 0 minutes later at 7:08 PM on June 27.

Daylight saving time (DST) is not observed in Ichinohe 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.

Ichinohe experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 2.4 months, from July 2 to September 14, during which time the comfort level is muggy, oppressive, or miserable at least 16% of the time. The month with the most muggy days in Ichinohe is August, with 16.6 days that are muggy or worse.

The least muggy day of the year is March 6, 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 Ichinohe experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 6.2 months, from October 29 to May 4, with average wind speeds of more than 8.4 miles per hour. The windiest month of the year in Ichinohe is February, with an average hourly wind speed of 11.1 miles per hour.

The calmer time of year lasts for 5.8 months, from May 4 to October 29. The calmest month of the year in Ichinohe is July, with an average hourly wind speed of 5.5 miles per hour.

The predominant average hourly wind direction in Ichinohe is from the west throughout the year.

Ichinohe 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 2.8 months, from July 20 to October 14, with an average temperature above 65°F. The month of the year in Ichinohe with the warmest water is August, with an average temperature of 69°F.

The time of year with cooler water lasts for 3.7 months, from January 19 to May 8, with an average temperature below 48°F. The month of the year in Ichinohe with the coolest water is March, with an average temperature of 43°F.

To characterize how pleasant the weather is in Ichinohe 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 Ichinohe for general outdoor tourist activities is from mid July to early September, with a peak score in the first 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 Ichinohe for hot-weather activities is from late July to mid August, with a peak score in the first 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 Ichinohe typically lasts for 6.3 months (191 days), from around April 20 to around October 29, rarely starting before April 6 or after May 5, and rarely ending before October 12 or after November 14.

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 Ichinohe should appear around May 5, only rarely appearing before April 26 or after May 15.

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 4.2 months, from April 15 to August 21, with an average daily incident shortwave energy per square meter above 5.2 kWh. The brightest month of the year in Ichinohe is June, with an average of 6.1 kWh.

The darker period of the year lasts for 3.1 months, from November 9 to February 11, with an average daily incident shortwave energy per square meter below 2.4 kWh. The darkest month of the year in Ichinohe is December, with an average of 1.6 kWh.

For the purposes of this report, the geographical coordinates of Ichinohe are 40.220 deg latitude, 141.290 deg longitude, and 797 ft elevation.

The topography within 2 miles of Ichinohe contains very significant variations in elevation, with a maximum elevation change of 974 feet and an average elevation above sea level of 780 feet. Within 10 miles contains very significant variations in elevation (2,651 feet). Within 50 miles contains large variations in elevation (6,991 feet).

The area within 2 miles of Ichinohe is covered by trees (77%) and cropland (19%), within 10 miles by trees (87%), and within 50 miles by trees (58%) and water (29%).