Climate and Average Weather Year Round in Geshan China

In Geshan, the summers are hot, oppressive, wet, and mostly cloudy and the winters are very cold and partly cloudy. Over the course of the year, the temperature typically varies from 34°F to 91°F and is rarely below 25°F or above 97°F.

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

The hot season lasts for 3.0 months, from June 11 to September 11, with an average daily high temperature above 82°F. The hottest month of the year in Geshan is July, with an average high of 90°F and low of 76°F.

The cool season lasts for 3.0 months, from December 3 to March 4, with an average daily high temperature below 56°F. The coldest month of the year in Geshan is January, with an average low of 34°F and high of 48°F.

In Geshan, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in Geshan begins around September 2 and lasts for 6.3 months, ending around March 11.

The clearest month of the year in Geshan is October, during which on average the sky is clear, mostly clear, or partly cloudy 69% of the time.

The cloudier part of the year begins around March 11 and lasts for 5.7 months, ending around September 2.

The cloudiest month of the year in Geshan is June, during which on average the sky is overcast or mostly cloudy 72% 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 Geshan varies significantly throughout the year.

The wetter season lasts 6.9 months, from February 17 to September 14, with a greater than 33% chance of a given day being a wet day. The month with the most wet days in Geshan is June, with an average of 14.5 days with at least 0.04 inches of precipitation.

The drier season lasts 5.1 months, from September 14 to February 17. The month with the fewest wet days in Geshan is December, with an average of 4.9 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 Geshan is June, with an average of 14.5 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 51% on June 22.

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. Geshan experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Geshan. The month with the most rain in Geshan is June, with an average rainfall of 7.8 inches.

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

Snowfall

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

The snowy period of the year lasts for 2.0 months, from December 21 to February 20, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Geshan is January, with an average snowfall of 1.8 inches.

The snowless period of the year lasts for 10 months, from February 20 to December 21. The least snow falls around July 24, with an average total accumulation of 0.0 inches.

The length of the day in Geshan varies significantly over the course of the year. In 2024, the shortest day is December 21, with 10 hours, 16 minutes of daylight; the longest day is June 21, with 14 hours, 1 minute of daylight.

The earliest sunrise is at 4:58 AM on June 10, and the latest sunrise is 1 hour, 55 minutes later at 6:53 AM on January 12. The earliest sunset is at 4:59 PM on December 2, and the latest sunset is 2 hours, 2 minutes later at 7:01 PM on July 1.

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

Geshan experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 5.1 months, from May 5 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 Geshan is July, with 30.7 days that are muggy or worse.

The month with the fewest muggy days in Geshan is January, with 0.0 days that are muggy or worse.

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 Geshan experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 3.5 months, from January 24 to May 10, with average wind speeds of more than 7.0 miles per hour. The windiest month of the year in Geshan is March, with an average hourly wind speed of 7.6 miles per hour.

The calmer time of year lasts for 8.5 months, from May 10 to January 24. The calmest month of the year in Geshan is June, with an average hourly wind speed of 6.4 miles per hour.

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

The wind is most often from the south for 4.5 months, from March 31 to August 17, with a peak percentage of 52% on July 20. The wind is most often from the east for 3.9 weeks, from August 17 to September 13, with a peak percentage of 38% on September 12. The wind is most often from the north for 6.6 months, from September 13 to March 31, with a peak percentage of 50% on January 1.

To characterize how pleasant the weather is in Geshan 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 Geshan for general outdoor tourist activities is from early September to mid 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 time of year to visit Geshan for hot-weather activities is from mid July to mid September, with a peak score in the second 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 Geshan typically lasts for 9.0 months (274 days), from around February 29 to around November 29, rarely starting before February 7 or after March 22, and rarely ending before November 12 or after December 18.

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 Geshan should appear around March 4, only rarely appearing before February 16 or after March 24.

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 some seasonal variation over the course of the year.

The brighter period of the year lasts for 2.0 months, from April 21 to June 20, with an average daily incident shortwave energy per square meter above 5.1 kWh. The brightest month of the year in Geshan is May, with an average of 5.5 kWh.

The darker period of the year lasts for 2.9 months, from November 10 to February 6, with an average daily incident shortwave energy per square meter below 3.6 kWh. The darkest month of the year in Geshan is December, with an average of 3.1 kWh.

For the purposes of this report, the geographical coordinates of Geshan are 29.288 deg latitude, 120.437 deg longitude, and 361 ft elevation.

The topography within 2 miles of Geshan contains very significant variations in elevation, with a maximum elevation change of 1,079 feet and an average elevation above sea level of 534 feet. Within 10 miles contains very significant variations in elevation (2,493 feet). Within 50 miles contains large variations in elevation (4,560 feet).

The area within 2 miles of Geshan is covered by trees (45%) and cropland (36%), within 10 miles by trees (66%) and cropland (23%), and within 50 miles by trees (70%) and cropland (21%).