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April Weather in Xi’an China

Daily high temperatures increase by 10°F, from 64°F to 74°F, rarely falling below 52°F or exceeding 85°F.

Daily low temperatures increase by 9°F, from 47°F to 56°F, rarely falling below 39°F or exceeding 63°F.

For reference, on July 20, the hottest day of the year, temperatures in Xi’an typically range from 74°F to 89°F, while on January 10, the coldest day of the year, they range from 25°F to 41°F.

Average High and Low Temperature in April in Xi’an

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in April in Xi’an

Average Hourly Temperature in April in Xi’anApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMMarMayNowNowvery coldcoldcoolcomfortablewarmvery cold
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
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Hazelwood, Missouri, United States (7,250 miles away) is the far-away foreign place with temperatures most similar to Xi’an (view comparison).

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The month of April in Xi’an experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 49% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 47% on April 26.

The clearest day of the month is April 26, with clear, mostly clear, or partly cloudy conditions 53% of the time.

For reference, on March 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 52%, while on December 15, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 72%.

Cloud Cover Categories in April in Xi’an

Cloud Cover Categories in April in Xi’anApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMayMar 2648%Mar 2648%Apr 3051%Apr 3051%Apr 1151%Apr 1151%Apr 2152%Apr 2152%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Xi’an, the chance of a wet day over the course of April is very rapidly increasing, starting the month at 15% and ending it at 23%.

For reference, the year's highest daily chance of a wet day is 35% on July 7, and its lowest chance is 1% on January 12.

Probability of Precipitation in April in Xi’an

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during April in Xi’an is increasing, starting the month at 1.1 inches, when it rarely exceeds 1.9 inches or falls below 0.4 inches, and ending the month at 1.8 inches, when it rarely exceeds 3.2 inches or falls below 0.7 inches.

Average Monthly Rainfall in April in Xi’an

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of April in Xi’an, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 58 minutes, implying an average daily increase of 2 minutes, 1 second, and weekly increase of 14 minutes, 4 seconds.

The shortest day of the month is April 1, with 12 hours, 34 minutes of daylight and the longest day is April 30, with 13 hours, 32 minutes of daylight.

Hours of Daylight and Twilight in April in Xi’an

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The latest sunrise of the month in Xi’an is 6:31 AM on April 1 and the earliest sunrise is 36 minutes earlier at 5:55 AM on April 30.

The earliest sunset is 7:05 PM on April 1 and the latest sunset is 23 minutes later at 7:27 PM on April 30.

Daylight saving time is not observed in Xi’an during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:32 AM and sets 14 hours, 27 minutes later, at 7:59 PM, while on December 21, the shortest day of the year, it rises at 7:46 AM and sets 9 hours, 52 minutes later, at 5:38 PM.

Sunrise & Sunset with Twilight in April in Xi’an

Sunrise & Sunset with Twilight in April in Xi’anApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMMarMay5:55 AM5:55 AMApr 307:27 PMApr 307:27 PM6:31 AM6:31 AMApr 17:05 PMApr 17:05 PM6:18 AM6:18 AMApr 117:12 PMApr 117:12 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of April. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in April in Xi’an

Solar Elevation and Azimuth in April in Xi’anApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMMarMay0010102020203030404050506060700001010202030303040405050606070NowNow
northeastsouthwest
Solar elevation and azimuth over the course of April 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for April 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in April in Xi’an

Moon Rise, Set & Phases in April in Xi’anApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMMarMayMar 105:01 PMMar 105:01 PMMar 253:01 PMMar 253:01 PMApr 92:22 AMApr 92:22 AMApr 247:50 AMApr 247:50 AMMay 811:23 AMMay 811:23 AMMay 239:54 PMMay 239:54 PM7:01 AM7:01 AM6:46 PM6:46 PM7:03 PM7:03 PM7:03 AM7:03 AM6:28 AM6:28 AM7:58 PM7:58 PM6:50 PM6:50 PM5:57 AM5:57 AM5:31 AM5:31 AM7:59 PM7:59 PM7:44 PM7:44 PM5:38 AM5:38 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Apr 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
63%1:04 AMSE10:33 AMSW-5:49 AMS239,489 mi
2
50%2:03 AMSE11:34 AMSW-6:48 AMS236,220 mi
3
41%2:56 AMESE12:41 PMWSW-7:49 AMS232,826 mi
4
29%3:42 AMESE1:53 PMWSW-8:48 AMS229,537 mi
5
19%4:21 AMESE3:07 PMWSW-9:44 AMS226,637 mi
6
10%4:56 AMESE4:20 PMWSW-10:37 AMS224,427 mi
7
4%5:27 AME5:32 PMW-11:28 AMS223,181 mi
8
0%5:58 AME6:45 PMW-12:19 PMS223,088 mi
9
0%6:28 AME7:58 PMWNW-1:10 PMS224,210 mi
10
3%7:01 AMENE9:11 PMWNW-2:02 PMS226,462 mi
11
9%7:39 AMENE10:25 PMWNW-2:58 PMS229,624 mi
12
17%8:21 AMENE11:35 PMWNW-3:55 PMS233,382 mi
13
26%9:11 AMNE--4:54 PMS237,379 mi
14
36%-12:38 AMNW10:06 AMNE5:51 PMS241,270 mi
15
47%-1:34 AMNW11:06 AMNE6:46 PMS244,769 mi
16
50%-2:20 AMWNW12:08 PMENE7:36 PMS247,671 mi
17
66%-2:58 AMWNW1:09 PMENE8:23 PMS249,855 mi
18
75%-3:30 AMWNW2:08 PMENE9:06 PMS251,278 mi
19
83%-3:57 AMWNW3:05 PMENE9:46 PMS251,960 mi
20
90%-4:22 AMW4:01 PME10:25 PMS251,966 mi
21
95%-4:45 AMW4:57 PME11:04 PMS251,389 mi
22
98%-5:08 AMW5:52 PME11:43 PMS250,335 mi
23
99%-5:31 AMW6:50 PMESE--
24
100%-5:57 AMWSW7:49 PMESE12:24 AMS248,904 mi
25
99%-6:26 AMWSW8:51 PMESE1:07 AMS247,184 mi
26
97%-7:00 AMWSW9:54 PMESE1:55 AMS245,241 mi
27
92%-7:40 AMWSW10:58 PMSE2:47 AMS243,118 mi
28
86%-8:29 AMSW11:58 PMSE3:44 AMS240,843 mi
29
77%-9:27 AMSW-4:42 AMS238,440 mi
30
67%12:52 AMSE10:32 AMWSW-5:42 AMS235,945 mi

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 that a given day will be muggy in Xi’an is gradually increasing during April, rising from 0% to 2% over the course of the month.

For reference, on July 29, the muggiest day of the year, there are muggy conditions 88% of the time, while on October 25, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in April in Xi’an

Humidity Comfort Levels in April in Xi’anApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%MarMayApr 10%Apr 10%Apr 302%Apr 302%Apr 110%Apr 110%Apr 211%Apr 211%NowNowhumidhumidcomfortablecomfortabledrydrymuggymuggy
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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 Xi’an is essentially constant during April, remaining within 0.2 miles per hour of 6.1 miles per hour throughout.

For reference, on April 24, the windiest day of the year, the daily average wind speed is 6.3 miles per hour, while on January 10, the calmest day of the year, the daily average wind speed is 4.4 miles per hour.

The highest daily average wind speed during April is 6.3 miles per hour on April 24.

Average Wind Speed in April in Xi’an

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Xi’an throughout April is predominantly from the south, with a peak proportion of 34% on April 11.

Wind Direction in April in Xi’an

Wind Direction in April in Xi’anESApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%MarMayNowNowwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

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 Xi’an typically lasts for 8.4 months (256 days), from around March 7 to around November 18, rarely starting before February 16 or after March 26, and rarely ending before October 29 or after December 7.

The month of April in Xi’an is very likely fully within the growing season, with the chance that a given day is in the growing season gradually increasing from 96% to 100% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in April in Xi’an

Time Spent in Various Temperature Bands and the Growing Season in April in Xi’angrowing seasonApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMay96%Apr 196%Apr 1100%Apr 30100%Apr 30100%Apr 11100%Apr 11100%Apr 21100%Apr 2150%Mar 750%Mar 7NowNowvery coldcoldcoolcomfortablewarmhotfreezing
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
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

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.

The average accumulated growing degree days in Xi’an are increasing during April, increasing by 321°F, from 137°F to 458°F, over the course of the month.

Growing Degree Days in April in Xi’an

Growing Degree Days in April in Xi’anApr112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030100°F100°F150°F150°F200°F200°F250°F250°F300°F300°F350°F350°F400°F400°F450°F450°F500°F500°F550°F550°FMarMayApr 1137°FApr 1137°FApr 30458°FApr 30458°FApr 11220°FApr 11220°FApr 21332°FApr 21332°FNowNow
The average growing degree days accumulated over the course of April, with 25th to 75th and 10th to 90th percentile bands.

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 in Xi’an is gradually increasing during April, rising by 0.8 kWh, from 5.2 kWh to 6.0 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in April in Xi’an

Average Daily Incident Shortwave Solar Energy in April in Xi’anApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhMarMayApr 15.2 kWhApr 15.2 kWhApr 306.0 kWhApr 306.0 kWhApr 115.6 kWhApr 115.6 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Xi’an are 34.258 deg latitude, 108.929 deg longitude, and 1,365 ft elevation.

The topography within 2 miles of Xi’an contains only modest variations in elevation, with a maximum elevation change of 141 feet and an average elevation above sea level of 1,340 feet. Within 10 miles contains only modest variations in elevation (1,227 feet). Within 50 miles contains very significant variations in elevation (8,757 feet).

The area within 2 miles of Xi’an is covered by artificial surfaces (100%), within 10 miles by cropland (50%) and artificial surfaces (38%), and within 50 miles by cropland (44%) and trees (23%).

This report illustrates the typical weather in Xi’an, 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, Xi'an Xianyang International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Xi’an.

At a distance of 27 kilometers from Xi’an, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the station and Xi’an according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

Other Data

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 © OpenStreetMap contributors.

Disclaimer

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.

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