Average Weather on April 9 in Siwang China
On April 9, the temperature in Siwang typically ranges from 57°F to 66°F and is rarely below 48°F or above 77°F.
For reference, on July 23, the hottest day of the year, temperatures in Siwang typically range from 80°F to 90°F, while on January 19, the coldest day of the year, they range from 35°F to 46°F.
The coolest time of the day is from 12:30 AM to 7:45 AM, with the coldest at 5:30 AM, at which time the temperature is below 61°F three days out of four, and below 65°F nine days out of ten.
The warmest time of the day is from 11:45 AM to 6:00 PM, with the hottest at 2:45 PM, at which time the temperature is above 61°F three days out of four, and above 55°F nine days out of ten.
The day has gained half its heat by 9:45 AM and lost it again by 9:00 PM.
Average Temperature on April 9
The figure below shows you a compact characterization of the range of temperatures experienced on April 9 throughout the historical record. The horizontal axis is the time of day and the colored stacked areas indicate the percentage of hours spent in various temperature bands.
Temperature Bands on April 9
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
Memphis, Tennessee, United States (7,644 miles away); Belhaven, North Carolina, United States (7,846 miles); and Tehran, Iran (3,681 miles) are the far-away foreign places with temperatures most similar to Siwang (view comparison).
Compared to April 9 (excluding 30 days before and after), October 28 has the most similar daily average high and low temperatures.
The average percentage of the sky covered by clouds in Siwang on April 9 varies over the course of the day.
The cloudiest time of day is around 2:30 PM, at which time the chance of overcast or mostly cloudy conditions is 60%.
The clearest time of day is around 2:30 AM, at which time the chance of clear, mostly clear, or partly cloudy conditions is 50%.
For reference, on July 4, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 73%, while on December 12, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 73%.
Cloud Cover Categories on April 9
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
On average, there is a 40% chance that more than 0.04 inches of total precipitation will fall in Siwang throughout the day on April 9, all of which can be expected to be rain.
For reference, the year's highest daily chance of precipitation is 48% on June 20, and its lowest chance is 14% on December 17.
For those 40% of years with precipitation on April 9, the chart below shows when throughout the day that precipitation is more or less likely to occur, excluding hourly accumulations of less than 0.01 inches. If precipitation were equally likely throughout the day, all hours would report 4.2% (100% divided by 24 hours).
Precipitation is most likely between 2 PM and 3 PM, and least likely between 6 AM and 7 AM.
Hourly Share of Precipitation on April 9
In Siwang on Thursday, April 9, 2020, the Sun rises at 5:57 AM and sets 12 hours, 44 minutes later, at 6:41 PM. Solar noon is at 12:19 PM.
For reference, on June 20, the longest day of the year, the Sun rises at 5:16 AM and sets 14 hours, 5 minutes later, at 7:21 PM, while on December 21, the shortest day of the year, it rises at 7:09 AM and sets 10 hours, 13 minutes later, at 5:22 PM.
Civil twilight, the period before the Sun has risen or after the Sun has set during which time it is possible to engage in most outdoor activities without artificial lighting, begins and ends 24 minutes before sunrise and after sunset, at 5:33 AM and 7:05 PM respectively.
Nautical twilight, during which time it is possible to clearly discern the horizon (e.g., for navigational purposes), begins and ends 53 minutes before sunrise and after sunset, at 5:04 AM and 7:34 PM respectively.
Astronomical twilight, outside of which it is possible to make the most sensitive of astronomical observations, begins and ends 1 hour, 22 minutes before sunrise and after sunset, at 4:35 AM and 8:03 PM respectively.
Solar Elevation on April 9, 2020
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 chance of muggy, oppressive, or miserable conditions in Siwang on April 9 varies over the course of the day, with an average daily chance of 8%.
The muggiest time of day on April 9 is around 12:30 PM, with muggy conditions 12% of the time.
The least muggy time of day is around 4:30 AM, with muggy conditions 5% of the time.
For reference, on July 12, the muggiest day of the year, there are muggy conditions 100% of the time, while on December 17, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels on April 9
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 in Siwang on April 9 varies throughout the day, with a daily average of 7.1 miles per hour.
The windiest time of day is around 11:30 AM, with an average hourly wind speed of 8.8 miles per hour, mostly staying between 5.5 miles per hour and 11.6 miles per hour, and rarely falling below 3.3 miles per hour or exceeding 15.1 miles per hour.
The calmest time of day is around 6:45 PM, with an average hourly wind speed of 5.8 miles per hour, mostly staying between 3.9 miles per hour and 7.0 miles per hour, and rarely falling below 2.6 miles per hour or exceeding 10.0 miles per hour.
For reference, on March 9, the windiest day of the year, the daily average wind speed is 7.3 miles per hour, while on August 14, the calmest day of the year, the daily average wind speed is 5.7 miles per hour.
Wind Speed on April 9
Over the entire course of April 9 in Siwang, the hourly average wind direction, in order of prevalence, is from the east (42%), south (24%), north (21%), and west (13%).
Wind Direction on April 9
Shortwave Solar Power
This section discusses the incident shortwave solar power 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 peak incident shortwave solar power per square meter is 0.64 kilowatts at around 12:15 PM.
In contrast, the corresponding value on May 31, the brightest day of the year, is 0.73 kilowatts at around 11:15 AM. The corresponding value on December 23, the darkest day of the year, is 0.50 kilowatts at around 11:15 AM.
Shortwave Solar Power on April 9
For the purposes of this report, the geographical coordinates of Siwang are 30.028 deg latitude, 115.552 deg longitude, and 115 ft elevation.
The topography within 2 miles of Siwang contains only modest variations in elevation, with a maximum elevation change of 285 feet and an average elevation above sea level of 122 feet. Within 10 miles contains only modest variations in elevation (1,309 feet). Within 50 miles contains very significant variations in elevation (5,249 feet).
The area within 2 miles of Siwang is covered by cropland (69%) and trees (21%), within 10 miles by cropland (59%) and trees (25%), and within 50 miles by trees (40%) and cropland (35%).
This report illustrates the typical weather in Siwang, 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
There is only a single weather station, Wuhan Tianhe International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Siwang.
At a distance of 154 kilometers from Siwang, further than our threshold of 150 kilometers, this station is deemed insufficiently nearby to be relied upon as our primary source for temperature and dew point records. Consequently, the station records are blended with interpolated values from NASA's MERRA-2 satellite-era reanalysis , and both are corrected for elevation differences according to the International Standard Atmosphere .
The weight assigned to the MERRA-2 value depends on the distance from Siwang to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 7%, making the weight assigned to the weather station 93%.
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 aiports 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.