Climate and Average Weather Year Round in Baiyun China

In Baiyun, the summers are short, hot, oppressive, wet, and overcast and the winters are cold and partly cloudy. Over the course of the year, the temperature typically varies from 35°F to 92°F and is rarely below 24°F or above 100°F.

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

The hot season lasts for 2.9 months, from June 12 to September 10, with an average daily high temperature above 84°F. The hottest month of the year in Baiyun is July, with an average high of 92°F and low of 71°F.

The cool season lasts for 3.3 months, from November 30 to March 7, with an average daily high temperature below 62°F. The coldest month of the year in Baiyun is January, with an average low of 35°F and high of 55°F.

In Baiyun, 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 Baiyun begins around September 16 and lasts for 6.2 months, ending around March 23.

The clearest month of the year in Baiyun is December, during which on average the sky is clear, mostly clear, or partly cloudy 71% of the time.

The cloudier part of the year begins around March 23 and lasts for 5.8 months, ending around September 16.

The cloudiest month of the year in Baiyun is June, during which on average the sky is overcast or mostly cloudy 78% 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 Baiyun varies significantly throughout the year.

The wetter season lasts 6.7 months, from February 23 to September 15, with a greater than 30% chance of a given day being a wet day. The month with the most wet days in Baiyun is May, with an average of 14.3 days with at least 0.04 inches of precipitation.

The drier season lasts 5.3 months, from September 15 to February 23. The month with the fewest wet days in Baiyun is December, with an average of 3.6 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 Baiyun is May, with an average of 14.3 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 50% on June 9.

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. Baiyun experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Baiyun. The month with the most rain in Baiyun is June, with an average rainfall of 7.3 inches.

The month with the least rain in Baiyun is December, with an average rainfall of 1.2 inches.

Snowfall

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

The snowy period of the year lasts for 2.1 months, from January 4 to March 7, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Baiyun is February, with an average snowfall of 1.8 inches.

The snowless period of the year lasts for 9.9 months, from March 7 to January 4. The least snow falls around August 5, with an average total accumulation of 0.0 inches.

The length of the day in Baiyun varies over the course of the year. In 2024, the shortest day is December 21, with 10 hours, 31 minutes of daylight; the longest day is June 21, with 13 hours, 46 minutes of daylight.

The earliest sunrise is at 5:11 AM on June 10, and the latest sunrise is 1 hour, 41 minutes later at 6:53 AM on January 13. The earliest sunset is at 5:12 PM on November 30, and the latest sunset is 1 hour, 48 minutes later at 7:00 PM on July 2.

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

Baiyun experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 5.2 months, from April 30 to October 3, 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 Baiyun is July, with 29.6 days that are muggy or worse.

The month with the fewest muggy days in Baiyun 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 Baiyun does not vary significantly over the course of the year, remaining within 0.5 miles per hour of 4.4 miles per hour throughout.

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

The wind is most often from the east for 3.8 months, from February 10 to June 5 and for 2.4 months, from August 16 to October 28, with a peak percentage of 56% on September 17. The wind is most often from the south for 2.4 months, from June 5 to August 16, with a peak percentage of 64% on July 4. The wind is most often from the north for 3.4 months, from October 28 to February 10, with a peak percentage of 60% on January 1.

Baiyun 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 4.0 months, from June 11 to October 10, with an average temperature above 76°F. The month of the year in Baiyun with the warmest water is August, with an average temperature of 81°F.

The time of year with cooler water lasts for 3.4 months, from December 20 to March 31, with an average temperature below 61°F. The month of the year in Baiyun with the coolest water is February, with an average temperature of 57°F.

To characterize how pleasant the weather is in Baiyun 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 Baiyun for general outdoor tourist activities is from late August 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 Baiyun for hot-weather activities is from early July to early September, with a peak score in the first 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 Baiyun typically lasts for 8.6 months (262 days), from around March 11 to around November 28, rarely starting before February 19 or after April 2, and rarely ending before November 4 or after December 20.

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 Baiyun should appear around February 16, only rarely appearing before February 4 or after March 5.

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 June 17 to August 17, with an average daily incident shortwave energy per square meter above 5.4 kWh. The brightest month of the year in Baiyun is July, with an average of 5.8 kWh.

The darker period of the year lasts for 3.3 months, from November 10 to February 19, with an average daily incident shortwave energy per square meter below 3.9 kWh. The darkest month of the year in Baiyun is December, with an average of 3.5 kWh.

For the purposes of this report, the geographical coordinates of Baiyun are 26.036 deg latitude, 118.906 deg longitude, and 1,703 ft elevation.

The topography within 2 miles of Baiyun contains large variations in elevation, with a maximum elevation change of 2,280 feet and an average elevation above sea level of 2,045 feet. Within 10 miles contains large variations in elevation (3,970 feet). Within 50 miles also contains extreme variations in elevation (5,955 feet).

The area within 2 miles of Baiyun is covered by trees (68%) and grassland (20%), within 10 miles by trees (75%) and grassland (13%), and within 50 miles by trees (66%) and grassland (12%).