Climate and Average Weather Year Round in Xishui China

In Xishui, the summers are comfortable and partly cloudy and the winters are freezing, dry, and mostly clear. Over the course of the year, the temperature typically varies from 4°F to 73°F and is rarely below -3°F or above 82°F.

Based on the tourism score, the best time of year to visit Xishui for warm-weather activities is from mid July to early August.

The warm season lasts for 3.4 months, from May 27 to September 10, with an average daily high temperature above 63°F. The hottest month of the year in Xishui is July, with an average high of 72°F and low of 48°F.

The cold season lasts for 3.4 months, from November 22 to March 3, with an average daily high temperature below 35°F. The coldest month of the year in Xishui is January, with an average low of 4°F and high of 26°F.

In Xishui, 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 Xishui begins around July 14 and lasts for 6.8 months, ending around February 7.

The clearest month of the year in Xishui is November, during which on average the sky is clear, mostly clear, or partly cloudy 75% of the time.

The cloudier part of the year begins around February 7 and lasts for 5.2 months, ending around July 14.

The cloudiest month of the year in Xishui is May, during which on average the sky is overcast or mostly cloudy 48% 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 Xishui varies throughout the year.

The wetter season lasts 3.8 months, from May 20 to September 13, with a greater than 11% chance of a given day being a wet day. The month with the most wet days in Xishui is July, with an average of 6.2 days with at least 0.04 inches of precipitation.

The drier season lasts 8.2 months, from September 13 to May 20. The month with the fewest wet days in Xishui is January, with an average of 0.0 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 Xishui is July, with an average of 6.2 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 21% on June 27.

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. Xishui experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 4.1 months, from May 18 to September 20, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Xishui is July, with an average rainfall of 1.4 inches.

The rainless period of the year lasts for 7.9 months, from September 20 to May 18. The month with the least rain in Xishui is December, with an average rainfall of -0.0 inches.

The length of the day in Xishui varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 28 minutes of daylight; the longest day is June 21, with 14 hours, 52 minutes of daylight.

The earliest sunrise is at 5:54 AM on June 13, and the latest sunrise is 2 hours, 43 minutes later at 8:37 AM on January 6. The earliest sunset is at 5:57 PM on December 7, and the latest sunset is 2 hours, 50 minutes later at 8:47 PM on June 28.

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

The perceived humidity level in Xishui, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

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

The windier part of the year lasts for 6.4 months, from March 3 to September 15, with average wind speeds of more than 6.2 miles per hour. The windiest month of the year in Xishui is May, with an average hourly wind speed of 7.5 miles per hour.

The calmer time of year lasts for 5.6 months, from September 15 to March 3. The calmest month of the year in Xishui is December, with an average hourly wind speed of 4.9 miles per hour.

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

The wind is most often from the north for 11 months, from January 13 to December 2, with a peak percentage of 48% on April 23. The wind is most often from the west for 1.4 months, from December 2 to January 13, with a peak percentage of 34% on January 1.

To characterize how pleasant the weather is in Xishui 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 Xishui for general outdoor tourist activities is from mid July to early August, with a peak score in the last week of July.

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 Xishui for hot-weather activities is from mid July to early August, with a peak score in the last week of July.

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 Xishui typically lasts for 4.0 months (123 days), from around May 22 to around September 23, rarely starting before May 4 or after June 9, and rarely ending before September 5 or after October 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 Xishui should appear around May 17, only rarely appearing before May 9 or after May 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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.3 months, from April 9 to August 18, with an average daily incident shortwave energy per square meter above 6.3 kWh. The brightest month of the year in Xishui is May, with an average of 7.1 kWh.

The darker period of the year lasts for 2.9 months, from November 8 to February 4, with an average daily incident shortwave energy per square meter below 3.7 kWh. The darkest month of the year in Xishui is December, with an average of 2.9 kWh.

For the purposes of this report, the geographical coordinates of Xishui are 38.636 deg latitude, 100.178 deg longitude, and 9,764 ft elevation.

The topography within 2 miles of Xishui contains large variations in elevation, with a maximum elevation change of 2,661 feet and an average elevation above sea level of 9,329 feet. Within 10 miles contains large variations in elevation (9,085 feet). Within 50 miles also contains extreme variations in elevation (12,136 feet).

The area within 2 miles of Xishui is covered by grassland (54%) and trees (38%), within 10 miles by grassland (51%) and trees (39%), and within 50 miles by grassland (51%) and trees (21%).