Climate and Average Weather Year Round in Tangxian China

In Tangxian, the summers are hot, muggy, wet, and partly cloudy and the winters are very cold, snowy, and mostly clear. Over the course of the year, the temperature typically varies from 30°F to 91°F and is rarely below 24°F or above 100°F.

Based on the tourism score, the best times of year to visit Tangxian for warm-weather activities are from mid May to early June and from late August to early October.

The hot season lasts for 3.8 months, from May 19 to September 13, with an average daily high temperature above 82°F. The hottest month of the year in Tangxian is July, with an average high of 91°F and low of 76°F.

The cold season lasts for 3.0 months, from November 29 to February 29, with an average daily high temperature below 54°F. The coldest month of the year in Tangxian is January, with an average low of 30°F and high of 45°F.

In Tangxian, 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 Tangxian begins around August 31 and lasts for 5.8 months, ending around February 23.

The clearest month of the year in Tangxian 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 February 23 and lasts for 6.3 months, ending around August 31.

The cloudiest month of the year in Tangxian is July, during which on average the sky is overcast or mostly cloudy 57% 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 Tangxian varies significantly throughout the year.

The wetter season lasts 4.7 months, from April 18 to September 8, with a greater than 23% chance of a given day being a wet day. The month with the most wet days in Tangxian is July, with an average of 11.5 days with at least 0.04 inches of precipitation.

The drier season lasts 7.3 months, from September 8 to April 18. The month with the fewest wet days in Tangxian is December, with an average of 2.4 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 Tangxian is July, with an average of 11.5 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 39% on July 8.

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. Tangxian experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 10 months, from January 31 to December 8, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Tangxian is July, with an average rainfall of 6.1 inches.

The rainless period of the year lasts for 1.7 months, from December 8 to January 31. The month with the least rain in Tangxian is January, with an average rainfall of 0.3 inches.

Snowfall

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

The snowy period of the year lasts for 2.2 months, from December 29 to March 4, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Tangxian is February, with an average snowfall of 1.3 inches.

The snowless period of the year lasts for 9.8 months, from March 4 to December 29. The least snow falls around July 17, with an average total accumulation of 0.0 inches.

The length of the day in Tangxian varies significantly over the course of the year. In 2024, the shortest day is December 21, with 10 hours, 3 minutes of daylight; the longest day is June 21, with 14 hours, 15 minutes of daylight.

The earliest sunrise is at 5:20 AM on June 11, and the latest sunrise is 2 hours, 8 minutes later at 7:28 AM on January 10. The earliest sunset is at 5:22 PM on December 3, and the latest sunset is 2 hours, 15 minutes later at 7:37 PM on June 29.

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

Tangxian experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.0 months, from May 22 to September 21, during which time the comfort level is muggy, oppressive, or miserable at least 24% of the time. The month with the most muggy days in Tangxian is July, with 29.5 days that are muggy or worse.

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

The windier part of the year lasts for 3.5 months, from February 8 to May 23, with average wind speeds of more than 7.2 miles per hour. The windiest month of the year in Tangxian is April, with an average hourly wind speed of 7.9 miles per hour.

The calmer time of year lasts for 8.5 months, from May 23 to February 8. The calmest month of the year in Tangxian is August, with an average hourly wind speed of 6.4 miles per hour.

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

The wind is most often from the south for 4.9 months, from March 12 to August 10, with a peak percentage of 56% on July 12. The wind is most often from the east for 1.6 months, from August 10 to September 27, with a peak percentage of 40% on August 30. The wind is most often from the north for 5.5 months, from September 27 to March 12, with a peak percentage of 41% on January 1.

To characterize how pleasant the weather is in Tangxian 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 times of year to visit Tangxian for general outdoor tourist activities are from mid May to early June and from late August to early October, with a peak score in the last week of September.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit Tangxian for hot-weather activities are from early June to early July and from late July to early September, with a peak score in the third 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 Tangxian typically lasts for 8.6 months (262 days), from around March 5 to around November 23, rarely starting before February 14 or after March 24, and rarely ending before November 2 or after December 10.

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 Tangxian should appear around March 16, only rarely appearing before March 3 or after March 30.

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 4.1 months, from April 20 to August 25, with an average daily incident shortwave energy per square meter above 5.4 kWh. The brightest month of the year in Tangxian is June, with an average of 6.0 kWh.

The darker period of the year lasts for 3.2 months, from November 3 to February 8, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest month of the year in Tangxian is December, with an average of 2.8 kWh.

For the purposes of this report, the geographical coordinates of Tangxian are 31.979 deg latitude, 113.114 deg longitude, and 400 ft elevation.

The topography within 2 miles of Tangxian contains only modest variations in elevation, with a maximum elevation change of 177 feet and an average elevation above sea level of 428 feet. Within 10 miles contains only modest variations in elevation (1,398 feet). Within 50 miles contains very significant variations in elevation (3,553 feet).

The area within 2 miles of Tangxian is covered by cropland (85%), within 10 miles by cropland (56%) and trees (36%), and within 50 miles by trees (47%) and cropland (43%).