Climate and Average Weather Year Round in Laocheng China

In Laocheng, the summers are hot, oppressive, wet, and overcast and the winters are cold and mostly clear. Over the course of the year, the temperature typically varies from 43°F to 92°F and is rarely below 34°F or above 98°F.

Based on the tourism score, the best time of year to visit Laocheng for warm-weather activities is from late September to early November.

The hot season lasts for 3.7 months, from June 3 to September 25, with an average daily high temperature above 85°F. The hottest month of the year in Laocheng is July, with an average high of 91°F and low of 76°F.

The cool season lasts for 3.1 months, from December 2 to March 6, with an average daily high temperature below 64°F. The coldest month of the year in Laocheng is January, with an average low of 43°F and high of 58°F.

In Laocheng, 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 Laocheng begins around September 18 and lasts for 6.6 months, ending around April 6.

The clearest month of the year in Laocheng is December, during which on average the sky is clear, mostly clear, or partly cloudy 74% of the time.

The cloudier part of the year begins around April 6 and lasts for 5.4 months, ending around September 18.

The cloudiest month of the year in Laocheng is June, during which on average the sky is overcast or mostly cloudy 79% 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 Laocheng varies significantly throughout the year.

The wetter season lasts 6.9 months, from February 20 to September 16, with a greater than 31% chance of a given day being a wet day. The month with the most wet days in Laocheng is May, with an average of 15.2 days with at least 0.04 inches of precipitation.

The drier season lasts 5.1 months, from September 16 to February 20. The month with the fewest wet days in Laocheng is December, with an average of 3.3 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 Laocheng is May, with an average of 15.2 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 10.

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. Laocheng experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Laocheng. The month with the most rain in Laocheng is May, with an average rainfall of 8.4 inches.

The month with the least rain in Laocheng is December, with an average rainfall of 1.4 inches.

The length of the day in Laocheng varies over the course of the year. In 2026, the shortest day is December 22, with 10 hours, 35 minutes of daylight; the longest day is June 21, with 13 hours, 42 minutes of daylight.

The earliest sunrise is at 5:25 AM on June 10, and the latest sunrise is 1 hour, 37 minutes later at 7:02 AM on January 13. The earliest sunset is at 5:25 PM on November 29, and the latest sunset is 1 hour, 44 minutes later at 7:09 PM on July 3.

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

Laocheng experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 6.6 months, from April 6 to October 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 Laocheng is July, with 30.6 days that are muggy or worse.

The month with the fewest muggy days in Laocheng 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 Laocheng experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.4 months, from October 27 to May 7, with average wind speeds of more than 3.9 miles per hour. The windiest month of the year in Laocheng is January, with an average hourly wind speed of 4.4 miles per hour.

The calmer time of year lasts for 5.6 months, from May 7 to October 27. The calmest month of the year in Laocheng is August, with an average hourly wind speed of 3.5 miles per hour.

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

The wind is most often from the south for 5.5 months, from March 16 to August 30, with a peak percentage of 76% on July 2. The wind is most often from the north for 6.5 months, from August 30 to March 16, with a peak percentage of 72% on January 1.

To characterize how pleasant the weather is in Laocheng 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 Laocheng for general outdoor tourist activities is from late September to early November, with a peak score in the second week of October.

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 Laocheng for hot-weather activities is from late August to early October, with a peak score in the third week of September.

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).

While it does not do so every year, freezing temperatures are seen in Laocheng over some winters. The day least likely to be in the growing season is January 7, with a 54% chance.

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 Laocheng should appear around January 24, only rarely appearing before January 15 or after February 6.

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 1.7 months, from June 18 to August 8, with an average daily incident shortwave energy per square meter above 5.6 kWh. The brightest month of the year in Laocheng is July, with an average of 5.9 kWh.

The darker period of the year lasts for 3.3 months, from November 15 to February 24, with an average daily incident shortwave energy per square meter below 4.2 kWh. The darkest month of the year in Laocheng is January, with an average of 3.8 kWh.

For the purposes of this report, the geographical coordinates of Laocheng are 25.027 deg latitude, 116.036 deg longitude, and 869 ft elevation.

The topography within 2 miles of Laocheng contains very significant variations in elevation, with a maximum elevation change of 830 feet and an average elevation above sea level of 981 feet. Within 10 miles contains very significant variations in elevation (3,484 feet). Within 50 miles also contains extreme variations in elevation (4,852 feet).

The area within 2 miles of Laocheng is covered by trees (67%) and cropland (16%), within 10 miles by trees (82%), and within 50 miles by trees (79%).