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Spring Weather in Hitachi-Naka Japan

Daily high temperatures increase by 22°F, from 49°F to 72°F, rarely falling below 42°F or exceeding 80°F.

Daily low temperatures increase by 26°F, from 31°F to 57°F, rarely falling below 23°F or exceeding 64°F.

For reference, on August 8, the hottest day of the year, temperatures in Hitachi-Naka typically range from 71°F to 84°F, while on January 21, the coldest day of the year, they range from 27°F to 46°F.

Average High and Low Temperature in the Spring in Hitachi-Naka

Average High and Low Temperature in the Spring in Hitachi-NakaMarAprMay20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°FWinterSummerMar 149°FMar 149°F31°F31°FMay 3172°FMay 3172°F57°F57°FApr 157°FApr 157°F40°F40°FMay 166°FMay 166°F49°F49°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 hourly average spring temperatures. The horizontal axis is the day, 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 the Spring in Hitachi-Naka

Average Hourly Temperature in the Spring in Hitachi-NakaMarAprMay12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMWinterSummerNowNowfreezingvery coldvery coldcoldcoolcomfortable
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).

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The spring in Hitachi-Naka experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 41% to 60%.

The clearest day of the spring is March 2, with clear, mostly clear, or partly cloudy conditions 59% of the time.

For reference, on July 2, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 71%, while on December 26, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 74%.

Cloud Cover Categories in the Spring in Hitachi-Naka

Cloud Cover Categories in the Spring in Hitachi-NakaMarAprMay0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%WinterSummerMar 159%Mar 159%May 3140%May 3140%Apr 151%Apr 151%May 145%May 145%NowNowclearmostly clearovercastpartly cloudymostly 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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Hitachi-Naka, the chance of a wet day over the course of the spring is very rapidly increasing, starting the season at 25% and ending it at 37%.

For reference, the year's highest daily chance of a wet day is 50% on July 2, and its lowest chance is 12% on December 29.

Over the course of the spring in Hitachi-Naka, the chance of a day with only rain increases from 21% to 37%, the chance of a day with mixed snow and rain decreases from 3% to 0%, and the chance of a day with only snow remains an essentially constant 0% throughout.

Probability of Precipitation in the Spring in Hitachi-Naka

Probability of Precipitation in the Spring in Hitachi-NakaMarAprMay0%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%45%45%50%50%55%55%WinterSummerMar 125%Mar 125%May 3137%May 3137%Apr 132%Apr 132%May 133%May 133%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 season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the spring in Hitachi-Naka is very rapidly increasing, starting the season at 2.7 inches, when it rarely exceeds 4.6 inches or falls below 0.9 inches, and ending the season at 4.9 inches, when it rarely exceeds 7.6 inches or falls below 2.5 inches.

Average Monthly Rainfall in the Spring in Hitachi-Naka

Average Monthly Rainfall in the Spring in Hitachi-NakaMarAprMay0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inWinterSummerMar 12.7 inMar 12.7 inMay 314.9 inMay 314.9 inApr 14.0 inApr 14.0 inMay 14.4 inMay 14.4 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 snowfall.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during the spring in Hitachi-Naka is decreasing, starting the season at 1.1 inches, when it rarely exceeds 3.5 inches or falls below -0.0 inches, and ending the season at 0.0 inches, when it rarely exceeds -0.0 inches or falls below -0.0 inches.

Average Monthly Snowfall in the Spring in Hitachi-Naka

Average Monthly Snowfall in the Spring in Hitachi-NakaMarAprMay0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 inWinterSummerMar 11.1 inMar 11.1 inMay 310.0 inMay 310.0 inApr 10.2 inApr 10.2 inMay 10.0 inMay 10.0 in
The average 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.

Over the course of the spring in Hitachi-Naka, the length of the day is very rapidly increasing. From the start to the end of the season, the length of the day increases by 3 hours, 4 minutes, implying an average daily increase of 2 minutes, 1 second, and weekly increase of 14 minutes, 8 seconds.

The shortest day of the spring is March 1, with 11 hours, 24 minutes of daylight and the longest day is May 31, with 14 hours, 28 minutes of daylight.

Hours of Daylight and Twilight in the Spring in Hitachi-Naka

Hours of Daylight and Twilight in the Spring in Hitachi-NakaMarAprMay0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrWinterSummerMar 2012 hr, 8 minMar 2012 hr, 8 minnightnightdaydayMay 3114 hr, 28 minMay 3114 hr, 28 minMay 113 hr, 41 minMay 113 hr, 41 minNowNow
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 latest sunrise of the spring in Hitachi-Naka is 6:08 AM on March 1 and the earliest sunrise is 1 hour, 47 minutes earlier at 4:21 AM on May 31.

The earliest sunset is 5:32 PM on March 1 and the latest sunset is 1 hour, 17 minutes later at 6:49 PM on May 31.

Daylight saving time is not observed in Hitachi-Naka during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 4:20 AM and sets 14 hours, 39 minutes later, at 6:58 PM, while on December 21, the shortest day of the year, it rises at 6:45 AM and sets 9 hours, 41 minutes later, at 4:26 PM.

Sunrise & Sunset with Twilight in the Spring in Hitachi-Naka

Sunrise & Sunset with Twilight in the Spring in Hitachi-NakaMarAprMay12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PMWinterSummer4:21 AM4:21 AMMay 316:49 PMMay 316:49 PM6:08 AM6:08 AMMar 15:32 PMMar 15:32 PM5:24 AM5:24 AMApr 15:59 PMApr 15:59 PM4:44 AM4:44 AMMay 16:25 PMMay 16:25 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day in the spring. 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.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in the Spring in Hitachi-Naka

Solar Elevation and Azimuth in the Spring in Hitachi-NakaMarAprMay12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMWinterSummer001020203030405050600010102030304040506070NowNow
northeastsouthwest
Solar elevation and azimuth in the the spring of 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for the spring of 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in the Spring in Hitachi-Naka

Moon Rise, Set & Phases in the Spring in Hitachi-NakaMarAprMay12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMWinterSummerFeb 108:00 AMFeb 108:00 AMFeb 249:31 PMFeb 249:31 PMMar 106:01 PMMar 106:01 PMMar 254:01 PMMar 254:01 PMApr 93:22 AMApr 93:22 AMApr 248:50 AMApr 248:50 AMMay 812:23 PMMay 812:23 PMMay 2310:54 PMMay 2310:54 PMJun 69:38 PMJun 69:38 PMJun 2210:09 AMJun 2210:09 AM6:53 AM6:53 AM5:29 PM5:29 PM5:07 PM5:07 PM6:43 AM6:43 AM5:54 AM5:54 AM5:32 PM5:32 PM5:52 PM5:52 PM5:54 AM5:54 AM5:17 AM5:17 AM6:48 PM6:48 PM5:41 PM5:41 PM4:45 AM4:45 AM4:17 AM4:17 AM6:52 PM6:52 PM6:38 PM6:38 PM4:21 AM4:21 AM3:30 AM3:30 AM6:35 PM6:35 PM3:51 AM3:51 AMNowNow
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.

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.

The chance that a given day will be muggy in Hitachi-Naka is rapidly increasing during the spring, rising from 0% to 11% over the course of the season.

For reference, on August 7, the muggiest day of the year, there are muggy conditions 90% of the time, while on December 26, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in the Spring in Hitachi-Naka

Humidity Comfort Levels in the Spring in Hitachi-NakaMarAprMay0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%WinterSummerMar 10%Mar 10%May 3111%May 3111%Apr 10%Apr 10%May 12%May 12%muggymuggyhumidhumiddrydryoppressiveoppressive
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.

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 is rapidly decreasing during the spring, decreasing from 9.3 miles per hour to 7.0 miles per hour over the course of the season.

For reference, on February 29, the windiest day of the year, the daily average wind speed is 9.3 miles per hour, while on July 28, the calmest day of the year, the daily average wind speed is 6.2 miles per hour.

Average Wind Speed in the Spring in Hitachi-Naka

Average Wind Speed in the Spring in Hitachi-NakaMarAprMay0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphWinterSummerMar 19.3 mphMar 19.3 mphMay 317.0 mphMay 317.0 mphApr 18.9 mphApr 18.9 mphMay 18.2 mphMay 18.2 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Hitachi-Naka during the spring is predominantly out of the north from March 1 to April 11 and the south from April 11 to May 31.

Wind Direction in the Spring in Hitachi-Naka

Wind Direction in the Spring in Hitachi-NakaNSEMarAprMay0%100%20%80%40%60%60%40%80%20%100%0%WinterSummerNowNowwestsoutheastnorth
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).

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 surface water temperature in Hitachi-Naka is rapidly increasing during the spring, rising by 10°F, from 54°F to 64°F, over the course of the season.

Average Water Temperature in the Spring in Hitachi-Naka

Average Water Temperature in the Spring in Hitachi-NakaMarAprMay50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°FWinterSummerMar 154°FMar 154°FMay 3164°FMay 3164°FApr 156°FApr 156°FMay 160°FMay 160°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

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 6 to around November 14, rarely starting before March 20 or after April 24, and rarely ending before October 29 or after November 30.

During the spring in Hitachi-Naka, the chance that a given day is within the growing season is very rapidly increasing rising from 0% to 100% over the course of the season.

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

Time Spent in Various Temperature Bands and the Growing Season in the Spring in Hitachi-Nakagrowing seasonMarAprMay0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%WinterSummerMar 10%Mar 10%100%May 31100%May 31Apr 137%Apr 137%95%May 195%May 1NowNowfreezingvery coldcoldcoolcomfortablewarm
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.

The average accumulated growing degree days in Hitachi-Naka are rapidly increasing during the spring, increasing by 529°F, from 13°F to 542°F, over the course of the season.

Growing Degree Days in the Spring in Hitachi-Naka

Growing Degree Days in the Spring in Hitachi-NakaMarAprMay100°F100°F200°F200°F300°F300°F400°F400°F500°F500°F600°F600°FWinterSummerMar 113°FMar 113°FMay 31542°FMay 31542°FApr 157°FApr 157°FMay 1216°FMay 1216°F
The average growing degree days accumulated over the course of the spring, with 25th to 75th and 10th to 90th percentile bands.

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 in Hitachi-Naka is rapidly increasing during the spring, rising by 2.0 kWh, from 3.9 kWh to 5.9 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the spring is 5.9 kWh on May 22.

Average Daily Incident Shortwave Solar Energy in the Spring in Hitachi-Naka

Average Daily Incident Shortwave Solar Energy in the Spring in Hitachi-NakaMarAprMay0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhWinterSummerMay 225.9 kWhMay 225.9 kWhMar 13.9 kWhMar 13.9 kWhApr 14.9 kWhApr 14.9 kWhMay 15.7 kWhMay 15.7 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.

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%).

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 © OpenStreetMap contributors.

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.

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