Climate and Average Weather Year Round in Hehe China

In Hehe, the summers are warm, oppressive, wet, and mostly cloudy; the winters are very cold and partly cloudy; and it is windy year round. Over the course of the year, the temperature typically varies from 36°F to 87°F and is rarely below 29°F or above 93°F.

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

The hot season lasts for 3.0 months, from June 19 to September 17, with an average daily high temperature above 78°F. The hottest month of the year in Hehe is August, with an average high of 85°F and low of 77°F.

The cool season lasts for 3.3 months, from December 7 to March 17, with an average daily high temperature below 53°F. The coldest month of the year in Hehe is January, with an average low of 36°F and high of 45°F.

In Hehe, 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 Hehe begins around August 28 and lasts for 6.6 months, ending around March 16.

The clearest month of the year in Hehe is December, during which on average the sky is clear, mostly clear, or partly cloudy 70% of the time.

The cloudier part of the year begins around March 16 and lasts for 5.4 months, ending around August 28.

The cloudiest month of the year in Hehe is July, during which on average the sky is overcast or mostly cloudy 67% 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 Hehe varies significantly throughout the year.

The wetter season lasts 6.0 months, from March 6 to September 7, with a greater than 31% chance of a given day being a wet day. The month with the most wet days in Hehe is June, with an average of 11.9 days with at least 0.04 inches of precipitation.

The drier season lasts 6.0 months, from September 7 to March 6. The month with the fewest wet days in Hehe is December, with an average of 4.4 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. The month with the most days of rain alone in Hehe is June, with an average of 11.9 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 49% on July 1.

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. Hehe experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Hehe. The month with the most rain in Hehe is June, with an average rainfall of 6.4 inches.

The month with the least rain in Hehe is December, with an average rainfall of 1.3 inches.

The length of the day in Hehe varies significantly over the course of the year. In 2024, the shortest day is December 21, with 10 hours, 5 minutes of daylight; the longest day is June 21, with 14 hours, 13 minutes of daylight.

The earliest sunrise is at 4:46 AM on June 11, and the latest sunrise is 2 hours, 7 minutes later at 6:53 AM on January 10. The earliest sunset is at 4:48 PM on December 4, and the latest sunset is 2 hours, 14 minutes later at 7:02 PM on June 30.

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

Hehe experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.6 months, from May 20 to October 8, during which time the comfort level is muggy, oppressive, or miserable at least 25% of the time. The month with the most muggy days in Hehe is July, with 30.6 days that are muggy or worse.

The least muggy day of the year is February 8, 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 Hehe experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 8.2 months, from August 30 to May 5, with average wind speeds of more than 12.1 miles per hour. The windiest month of the year in Hehe is December, with an average hourly wind speed of 13.1 miles per hour.

The calmer time of year lasts for 3.8 months, from May 5 to August 30. The calmest month of the year in Hehe is June, with an average hourly wind speed of 11.1 miles per hour.

The predominant average hourly wind direction in Hehe varies throughout the year.

The wind is most often from the south for 1.4 months, from April 8 to May 21 and for 1.6 months, from June 21 to August 10, with a peak percentage of 54% on July 20. The wind is most often from the east for 1.0 months, from May 21 to June 21 and for 1.3 months, from August 10 to September 18, with a peak percentage of 43% on September 12. The wind is most often from the north for 6.7 months, from September 18 to April 8, with a peak percentage of 54% on January 1.

Hehe 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 3.3 months, from June 26 to October 4, with an average temperature above 73°F. The month of the year in Hehe with the warmest water is August, with an average temperature of 80°F.

The time of year with cooler water lasts for 3.3 months, from December 24 to April 3, with an average temperature below 51°F. The month of the year in Hehe with the coolest water is February, with an average temperature of 44°F.

To characterize how pleasant the weather is in Hehe 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 Hehe for general outdoor tourist activities is from mid September to mid October, with a peak score in the first week of October.

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 Hehe for hot-weather activities is from late July to late September, with a peak score in the first week of September.

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 Hehe typically lasts for 10 months (303 days), from around February 17 to around December 17, rarely starting before January 27 or after March 10, and rarely ending before November 29 or after January 4.

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 Hehe should appear around March 30, only rarely appearing before March 15 or after April 16.

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 2.0 months, from April 18 to June 18, with an average daily incident shortwave energy per square meter above 5.5 kWh. The brightest month of the year in Hehe is May, with an average of 6.0 kWh.

The darker period of the year lasts for 3.0 months, from November 6 to February 7, with an average daily incident shortwave energy per square meter below 3.5 kWh. The darkest month of the year in Hehe is December, with an average of 2.9 kWh.

For the purposes of this report, the geographical coordinates of Hehe are 31.738 deg latitude, 121.803 deg longitude, and 13 ft elevation.

The topography within 2 miles of Hehe is essentially flat, with a maximum elevation change of 26 feet and an average elevation above sea level of 10 feet. Within 10 miles is also essentially flat (59 feet). Within 50 miles is essentially flat (341 feet).

The area within 2 miles of Hehe is covered by cropland (97%), within 10 miles by water (54%) and cropland (40%), and within 50 miles by water (70%) and cropland (21%).