Climate and Average Weather Year Round at Chiayi Airport Taiwan
At Chiayi Airport, the wet season is hot, oppressive, and overcast and the dry season is warm, humid, and mostly clear. Over the course of the year, the temperature typically varies from 56°F to 91°F and is rarely below 49°F or above 94°F.
Based on the tourism score, the best times of year to visit Chiayi Airport for warm-weather activities are from late February to mid April and from mid October to mid December.
Climate at Chiayi Airport
The hot season lasts for 4.3 months, from May 26 to October 3, with an average daily high temperature above 87°F. The hottest month of the year at Chiayi Airport is July, with an average high of 91°F and low of 78°F.
The cool season lasts for 2.8 months, from December 12 to March 6, with an average daily high temperature below 75°F. The coldest month of the year at Chiayi Airport is January, with an average low of 56°F and high of 72°F.
Average High and Low Temperature at Chiayi Airport
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature at Chiayi Airport
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
South Point, Texas, United States (8,203 miles away) and South Highpoint, Florida, United States (8,577 miles) are the far-away foreign places with temperatures most similar to Chiayi Airport (view comparison).
At Chiayi Airport, 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 at Chiayi Airport begins around October 6 and lasts for 6.6 months, ending around April 23.
The clearest month of the year at Chiayi Airport is January, during which on average the sky is clear, mostly clear, or partly cloudy 78% of the time.
The cloudier part of the year begins around April 23 and lasts for 5.5 months, ending around October 6.
The cloudiest month of the year at Chiayi Airport is June, during which on average the sky is overcast or mostly cloudy 81% of the time.
Cloud Cover Categories at Chiayi Airport
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Chiayi Airport varies significantly throughout the year.
The wetter season lasts 4.6 months, from May 1 to September 21, with a greater than 31% chance of a given day being a wet day. The month with the most wet days at Chiayi Airport is August, with an average of 15.9 days with at least 0.04 inches of precipitation.
The drier season lasts 7.4 months, from September 21 to May 1. The month with the fewest wet days at Chiayi Airport is November, with an average of 2.5 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 at Chiayi Airport is August, with an average of 15.9 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 54% on August 18.
Daily Chance of Precipitation at Chiayi Airport
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. Chiayi Airport experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year at Chiayi Airport. The month with the most rain at Chiayi Airport is August, with an average rainfall of 11.3 inches.
The month with the least rain at Chiayi Airport is December, with an average rainfall of 0.8 inches.
Average Monthly Rainfall at Chiayi Airport
The length of the day at Chiayi Airport varies over the course of the year. In 2021, the shortest day is December 21, with 10 hours, 41 minutes of daylight; the longest day is June 21, with 13 hours, 35 minutes of daylight.
Hours of Daylight and Twilight at Chiayi Airport
The earliest sunrise is at 5:11 AM on June 8, and the latest sunrise is 1 hour, 31 minutes later at 6:42 AM on January 14. The earliest sunset is at 5:11 PM on November 29, and the latest sunset is 1 hour, 38 minutes later at 6:49 PM on July 4.
Daylight saving time (DST) is not observed at Chiayi Airport during 2021.
Sunrise & Sunset with Twilight at Chiayi Airport
The figure below presents a compact representation of key lunar data for 2021. 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.
Moon Rise, Set & Phases at Chiayi Airport
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.
Chiayi Airport experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 8.7 months, from March 11 to December 2, during which time the comfort level is muggy, oppressive, or miserable at least 28% of the time. The month with the most muggy days at Chiayi Airport is July, with 31.0 days that are muggy or worse.
The month with the fewest muggy days at Chiayi Airport is January, with 1.4 days that are muggy or worse.
Humidity Comfort Levels at Chiayi Airport
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 at Chiayi Airport experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 4.2 months, from November 12 to March 18, with average wind speeds of more than 6.9 miles per hour. The windiest month of the year at Chiayi Airport is January, with an average hourly wind speed of 7.8 miles per hour.
The calmer time of year lasts for 7.8 months, from March 18 to November 12. The calmest month of the year at Chiayi Airport is May, with an average hourly wind speed of 6.0 miles per hour.
Average Wind Speed at Chiayi Airport
The predominant average hourly wind direction at Chiayi Airport varies throughout the year.
The wind is most often from the south for 3.2 months, from May 22 to August 29, with a peak percentage of 62% on June 22. The wind is most often from the north for 8.8 months, from August 29 to May 22, with a peak percentage of 80% on January 1.
Wind Direction at Chiayi Airport
Chiayi Airport 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 some seasonal variation over the course of the year.
The time of year with warmer water lasts for 4.0 months, from June 2 to October 4, with an average temperature above 81°F. The month of the year at Chiayi Airport with the warmest water is August, with an average temperature of 83°F.
The time of year with cooler water lasts for 3.0 months, from December 18 to March 17, with an average temperature below 73°F. The month of the year at Chiayi Airport with the coolest water is February, with an average temperature of 71°F.
Average Water Temperature at Chiayi Airport
To characterize how pleasant the weather is at Chiayi Airport 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 Chiayi Airport for general outdoor tourist activities are from late February to mid April and from mid October to mid December, with a peak score in the second week of November.
Tourism Score at Chiayi Airport
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 Chiayi Airport for hot-weather activities is from late September to late October, with a peak score in the second week of October.
Beach/Pool Score at Chiayi Airport
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).
Temperatures at Chiayi Airport are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season at Chiayi Airport
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
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.
Growing Degree Days at Chiayi Airport
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 2.4 months, from March 15 to May 28, with an average daily incident shortwave energy per square meter above 5.5 kWh. The brightest month of the year at Chiayi Airport is April, with an average of 5.9 kWh.
The darker period of the year lasts for 2.3 months, from November 15 to January 23, with an average daily incident shortwave energy per square meter below 4.3 kWh. The darkest month of the year at Chiayi Airport is December, with an average of 4.0 kWh.
Average Daily Incident Shortwave Solar Energy at Chiayi Airport
For the purposes of this report, the geographical coordinates of Chiayi Airport are 23.462 deg latitude, 120.393 deg longitude, and 66 ft elevation.
The topography within 2 miles of Chiayi Airport contains only modest variations in elevation, with a maximum elevation change of 128 feet and an average elevation above sea level of 80 feet. Within 10 miles contains only modest variations in elevation (1,106 feet). Within 50 miles contains very significant variations in elevation (12,943 feet).
The area within 2 miles of Chiayi Airport is covered by artificial surfaces (56%), cropland (16%), sparse vegetation (12%), and bare soil (12%), within 10 miles by cropland (41%) and trees (30%), and within 50 miles by water (47%) and trees (37%).
This report illustrates the typical weather at Chiayi Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
Chiayi Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.
In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.
The stations on which we may fall back include but are not limited to Tainan Airport, Kangshan Tw-Afb, Pingtung North Air Force Base, Taichung Tw-Afb, Magong Airport, Pingtung South Air Force Base, Taichung Airport, and Kaohsiung International Airport.
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for airports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.