Climate and Average Weather Year Round in Yanweigang China

In Yanweigang, the summers are long, muggy, wet, and warm; the winters are dry, very cold, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 30°F to 86°F and is rarely below 24°F or above 91°F.

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

The hot season lasts for 3.9 months, from May 25 to September 22, with an average daily high temperature above 77°F. The hottest month of the year in Yanweigang is July, with an average high of 85°F and low of 74°F.

The cold season lasts for 3.1 months, from December 5 to March 8, with an average daily high temperature below 49°F. The coldest month of the year in Yanweigang is January, with an average low of 31°F and high of 41°F.

In Yanweigang, 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 Yanweigang begins around August 22 and lasts for 5.8 months, ending around February 15.

The clearest month of the year in Yanweigang is December, during which on average the sky is clear, mostly clear, or partly cloudy 67% of the time.

The cloudier part of the year begins around February 15 and lasts for 6.2 months, ending around August 22.

The cloudiest month of the year in Yanweigang is July, during which on average the sky is overcast or mostly cloudy 56% 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 Yanweigang varies significantly throughout the year.

The wetter season lasts 2.7 months, from June 17 to September 7, with a greater than 27% chance of a given day being a wet day. The month with the most wet days in Yanweigang is July, with an average of 13.6 days with at least 0.04 inches of precipitation.

The drier season lasts 9.3 months, from September 7 to June 17. The month with the fewest wet days in Yanweigang is January, with an average of 2.6 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 Yanweigang is July, with an average of 13.6 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 46% on July 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. Yanweigang experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Yanweigang. The month with the most rain in Yanweigang is July, with an average rainfall of 7.5 inches.

The month with the least rain in Yanweigang is January, with an average rainfall of 0.6 inches.

The length of the day in Yanweigang varies significantly over the course of the year. In 2026, the shortest day is December 22, with 9 hours, 51 minutes of daylight; the longest day is June 21, with 14 hours, 28 minutes of daylight.

The earliest sunrise is at 4:47 AM on June 13, and the latest sunrise is 2 hours, 20 minutes later at 7:08 AM on January 8. The earliest sunset is at 4:50 PM on December 5, and the latest sunset is 2 hours, 27 minutes later at 7:17 PM on June 29.

Daylight saving time (DST) is not observed in Yanweigang during 2026.

The figure below presents a compact representation of key lunar data for 2026. 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.

Yanweigang experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.6 months, from June 8 to September 26, 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 Yanweigang is July, with 29.1 days that are muggy or worse.

The least muggy day of the year is February 15, 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 Yanweigang experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.9 months, from October 24 to May 21, with average wind speeds of more than 9.7 miles per hour. The windiest month of the year in Yanweigang is December, with an average hourly wind speed of 10.6 miles per hour.

The calmer time of year lasts for 5.1 months, from May 21 to October 24. The calmest month of the year in Yanweigang is July, with an average hourly wind speed of 8.7 miles per hour.

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

The wind is most often from the east for 1.1 weeks, from March 16 to March 24; for 1.3 months, from May 27 to July 6; and for 2.5 months, from July 29 to October 12, with a peak percentage of 45% on August 17. The wind is most often from the south for 2.1 months, from March 24 to May 27 and for 3.3 weeks, from July 6 to July 29, with a peak percentage of 42% on July 12. The wind is most often from the north for 5.1 months, from October 12 to March 16, with a peak percentage of 47% on January 1.

Yanweigang 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 27 to October 5, with an average temperature above 72°F. The month of the year in Yanweigang with the warmest water is August, with an average temperature of 79°F.

The time of year with cooler water lasts for 3.6 months, from December 22 to April 9, with an average temperature below 48°F. The month of the year in Yanweigang with the coolest water is February, with an average temperature of 40°F.

To characterize how pleasant the weather is in Yanweigang 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 Yanweigang for general outdoor tourist activities are from late May to mid June and from late August to mid October, with a peak score in the third 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 Yanweigang for hot-weather activities is 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 Yanweigang typically lasts for 8.7 months (266 days), from around March 13 to around December 4, rarely starting before February 24 or after March 31, and rarely ending before November 18 or after December 21.

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 Yanweigang should appear around April 10, only rarely appearing before April 4 or after April 18.

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 2.6 months, from April 16 to July 4, with an average daily incident shortwave energy per square meter above 5.7 kWh. The brightest month of the year in Yanweigang is May, with an average of 6.3 kWh.

The darker period of the year lasts for 3.0 months, from November 5 to February 5, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest month of the year in Yanweigang is December, with an average of 2.7 kWh.

For the purposes of this report, the geographical coordinates of Yanweigang are 34.467 deg latitude, 119.767 deg longitude, and -7 ft elevation.

The topography within 2 miles of Yanweigang is essentially flat, with a maximum elevation change of 72 feet and an average elevation above sea level of 1 foot. Within 10 miles is also essentially flat (92 feet). Within 50 miles is essentially flat (2,054 feet).

The area within 2 miles of Yanweigang is covered by artificial surfaces (36%), water (23%), cropland (17%), and bare soil (13%), within 10 miles by water (42%) and artificial surfaces (25%), and within 50 miles by water (52%) and cropland (33%).