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Climate and Average Weather Year Round in Hitachi-Naka Japan

In Hitachi-Naka, the summers are short, warm, muggy, wet, and mostly cloudy and the winters are very cold and mostly clear. Over the course of the year, the temperature typically varies from 27°F to 84°F and is rarely below 19°F or above 91°F.

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

Climate in Hitachi-Naka

coldcoolcomfortablewarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow74%74%29%29%clearovercastprecipitation: 7.2 inprecipitation: 7.2 in1.5 in1.5 inmuggy: 90%muggy: 90%0%0%drydrytourism score: 6.4tourism score: 6.40.00.0
Hitachi-Naka weather by month. Click on each chart for more information.

Average Temperature in Hitachi-Naka

The warm season lasts for 2.7 months, from June 29 to September 19, with an average daily high temperature above 76°F. The hottest day of the year is August 9, with an average high of 84°F and low of 71°F.

The cold season lasts for 3.5 months, from December 5 to March 20, with an average daily high temperature below 53°F. The coldest day of the year is January 21, with an average low of 27°F and high of 46°F.

Average High and Low Temperature in Hitachi-Naka

Average High and Low Temperature in Hitachi-NakawarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2146°FJan 2146°FAug 984°FAug 984°F27°F27°F71°F71°FJun 2976°FJun 2976°FSep 1976°FSep 1976°FDec 553°FDec 553°FMar 2053°FMar 2053°F64°F64°F64°F64°F34°F34°F36°F36°FNowNow
The daily average high (red line) and low (blue line) temperature, 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 in Hitachi-Naka

Average Hourly Temperature in Hitachi-NakaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingvery coldvery coldvery coldvery coldcoldcoldcoolcoolcomfortablewarmfreezing
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Ocean City, Maryland, United States (6,803 miles away) is the far-away foreign place with temperatures most similar to Hitachi-Naka (view comparison).

Compare Hitachi-Naka to another city:

Clouds

In Hitachi-Naka, 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 Hitachi-Naka begins around October 7 and lasts for 5.7 months, ending around March 31. On December 27, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 74% of the time, and overcast or mostly cloudy 26% of the time.

The cloudier part of the year begins around March 31 and lasts for 6.3 months, ending around October 7. On July 3, the cloudiest day of the year, the sky is overcast or mostly cloudy 71% of the time, and clear, mostly clear, or partly cloudy 29% of the time.

Cloud Cover Categories in Hitachi-Naka

Cloud Cover Categories in Hitachi-NakaclearerclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Dec 2774%Dec 2774%Jul 329%Jul 329%Oct 751%Oct 751%Mar 3152%Mar 3152%NowNowclearmostly clearpartly cloudyovercastmostly cloudy
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

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

The wetter season lasts 6.7 months, from March 27 to October 17, with a greater than 31% chance of a given day being a wet day. The chance of a wet day peaks at 50% on July 2.

The drier season lasts 5.3 months, from October 17 to March 27. The smallest chance of a wet day is 12% on December 30.

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 50% on July 2.

Daily Chance of Precipitation in Hitachi-Naka

Daily Chance of Precipitation in Hitachi-NakawetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 250%Jul 250%Dec 3012%Dec 3012%Mar 2731%Mar 2731%Oct 1731%Oct 1731%NowNowrainmixed
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 of the year. Hitachi-Naka experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Hitachi-Naka. The most rain falls during the 31 days centered around September 23, with an average total accumulation of 7.2 inches.

The least rain falls around December 31, with an average total accumulation of 1.5 inches.

Average Monthly Rainfall in Hitachi-Naka

Average Monthly Rainfall in Hitachi-NakaJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 in14 in14 inSep 237.2 inSep 237.2 inDec 311.5 inDec 311.5 inJun 306.0 inJun 306.0 inNowNow
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

The sliding 31-day liquid-equivalent quantity of snowfall in Hitachi-Naka does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.

Average Liquid-Equivalent Monthly Snowfall in Hitachi-Naka

Average Liquid-Equivalent Monthly Snowfall in Hitachi-NakasnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 inFeb 170.1 inFeb 170.1 inAug 40.0 inAug 40.0 inNowNow
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.

Sun

The length of the day in Hitachi-Naka varies significantly over the course of the year. In 2021, the shortest day is December 22, 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 in Hitachi-Naka

Hours of Daylight and Twilight in Hitachi-NakaJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2014 hr, 39 minJun 2114 hr, 39 minJun 2112 hr, 10 minSep 2312 hr, 10 minSep 239 hr, 41 minDec 229 hr, 41 minDec 22nightnightdayNowNow
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 4:19 AM on June 13, and the latest sunrise is 2 hours, 31 minutes later at 6:49 AM on January 6. The earliest sunset is at 4:22 PM on December 6, and the latest sunset is 2 hours, 37 minutes later at 6:59 PM on June 29.

Daylight saving time (DST) is not observed in Hitachi-Naka during 2021.

Sunrise & Sunset with Twilight in Hitachi-Naka

Sunrise & Sunset with Twilight in Hitachi-NakaJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PMJun 134:19 AMJun 134:19 AM6:59 PMJun 296:59 PMJun 29Dec 64:22 PMDec 64:22 PM6:49 AMJan 66:49 AMJan 6daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. 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.

Moon

The figure below presents a compact representation of key lunar data for 2021. 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.

Moon Rise, Set & Phases in Hitachi-Naka

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

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.

Hitachi-Naka experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.6 months, from June 11 to September 30, during which time the comfort level is muggy, oppressive, or miserable at least 23% of the time. The muggiest day of the year is August 8, with muggy conditions 90% of the time.

The least muggy day of the year is December 30, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in Hitachi-Naka

Humidity Comfort Levels in Hitachi-NakamuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Dec 300%Dec 300%90%Aug 890%Aug 8Jun 1123%Jun 1123%Sep 3023%Sep 3023%NowNowmiserablemiserableoppressiveoppressivedrydrymuggymuggy
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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 Hitachi-Naka experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.9 months, from November 16 to May 12, with average wind speeds of more than 7.8 miles per hour. The windiest day of the year is March 1, with an average hourly wind speed of 9.3 miles per hour.

The calmer time of year lasts for 6.1 months, from May 12 to November 16. The calmest day of the year is July 29, with an average hourly wind speed of 6.2 miles per hour.

Average Wind Speed in Hitachi-Naka

Average Wind Speed in Hitachi-NakawindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphMar 19.3 mphMar 19.3 mphJul 296.2 mphJul 296.2 mphNov 167.8 mphNov 167.8 mphMay 127.8 mphMay 127.8 mphNowNow
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 Hitachi-Naka varies throughout the year.

The wind is most often from the south for 2.0 months, from April 12 to June 13 and for 1.8 months, from July 2 to August 28, with a peak percentage of 46% on August 8. The wind is most often from the east for 2.7 weeks, from June 13 to July 2 and for 1.0 months, from August 28 to September 28, with a peak percentage of 39% on September 1. The wind is most often from the north for 6.5 months, from September 28 to April 12, with a peak percentage of 45% on January 1.

Wind Direction in Hitachi-Naka

Wind Direction in Hitachi-NakaNSESENJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 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

Hitachi-Naka 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 17 to October 3, with an average temperature above 71°F. The day of the year with the warmest water is August 22, with an average temperature of 75°F.

The time of year with cooler water lasts for 3.5 months, from January 6 to April 22, with an average temperature below 59°F. The day of the year with the coolest water is March 1, with an average temperature of 54°F.

Average Water Temperature in Hitachi-Naka

Average Water Temperature in Hitachi-NakawarmcoolJanFebMarAprMayJunJulAugSepOctNovDec45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°FAug 2275°FAug 2275°F54°FMar 154°FMar 1Jul 1771°FJul 1771°FOct 371°FOct 371°FJan 659°FJan 659°FApr 2259°FApr 2259°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Best Time of Year to Visit

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

Tourism Score in Hitachi-Naka

Tourism Score in Hitachi-Nakabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.46.40.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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

Beach/Pool Score in Hitachi-Naka

Beach/Pool Score in Hitachi-NakaJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.65.60.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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.

Growing Season

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 Hitachi-Naka typically lasts for 7.3 months (222 days), from around April 7 to around November 15, rarely starting before March 21 or after April 25, and rarely ending before October 30 or after December 1.

Time Spent in Various Temperature Bands and the Growing Season in Hitachi-Naka

Time Spent in Various Temperature Bands and the Growing Season in Hitachi-Nakagrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 750%Apr 750%Nov 1550%Nov 1590%Apr 2590%Apr 2590%Oct 3090%Oct 3010%Mar 2110%Mar 2110%Dec 110%Dec 10%Feb 20%Feb 2Aug 2100%Aug 2100%NowNowfreezingvery coldcoldcoolcomfortablewarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

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 Hitachi-Naka should appear around April 10, only rarely appearing before March 29 or after April 22.

Growing Degree Days in Hitachi-Naka

Growing Degree Days in Hitachi-NakaJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°F3,500°F3,500°F4,000°F4,000°FApr 1087°FApr 1087°FJun 23900°FJun 23900°FAug 21,800°FAug 21,800°FDec 313,564°FDec 313,564°FNowNow
The average growing degree days accumulated over the course of the year, 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 12 to August 29, with an average daily incident shortwave energy per square meter above 5.2 kWh. The brightest day of the year is May 23, with an average of 5.9 kWh.

The darker period of the year lasts for 3.1 months, from November 3 to February 5, with an average daily incident shortwave energy per square meter below 3.2 kWh. The darkest day of the year is December 20, with an average of 2.5 kWh.

Average Daily Incident Shortwave Solar Energy in Hitachi-Naka

Average Daily Incident Shortwave Solar Energy in Hitachi-NakabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhMay 235.9 kWhMay 235.9 kWhDec 202.5 kWhDec 202.5 kWhApr 125.2 kWhApr 125.2 kWhAug 295.2 kWhAug 295.2 kWhNov 33.2 kWhNov 33.2 kWhFeb 53.2 kWhFeb 53.2 kWhNowNow
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 Hitachi-Naka are 36.397 deg latitude, 140.535 deg longitude, and 102 ft elevation.

The topography within 2 miles of Hitachi-Naka contains only modest variations in elevation, with a maximum elevation change of 138 feet and an average elevation above sea level of 78 feet. Within 10 miles contains only modest variations in elevation (873 feet). Within 50 miles contains very significant variations in elevation (3,445 feet).

The area within 2 miles of Hitachi-Naka is covered by cropland (75%) and trees (13%), within 10 miles by water (40%) and cropland (39%), and within 50 miles by water (50%) and trees (25%).

Data Sources

This report illustrates the typical weather in Hitachi-Naka, 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 is only a single weather station, Hyakuri Ab, in our network suitable to be used as a proxy for the historical temperature and dew point records of Hitachi-Naka.

At a distance of 26 kilometers from Hitachi-Naka, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the station and Hitachi-Naka according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.