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October Weather in Xi’an China

Daily high temperatures decrease by 11°F, from 72°F to 61°F, rarely falling below 51°F or exceeding 81°F.

Daily low temperatures decrease by 12°F, from 57°F to 45°F, rarely falling below 37°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 October 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 October. 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 October in Xi’an

Average Hourly Temperature in October in Xi’anOct112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMSepNovvery coldvery coldcoldcoolcomfortablewarm
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 October in Xi’an experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 43% to 35%.

The clearest day of the month is October 31, with clear, mostly clear, or partly cloudy conditions 65% 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 October in Xi’an

Cloud Cover Categories in October in Xi’anOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SepNovOct 157%Oct 157%Oct 3165%Oct 3165%Oct 1159%Oct 1159%Oct 2162%Oct 2162%clearmostly 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 October is very rapidly decreasing, starting the month at 26% and ending it at 16%.

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 October 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 October in Xi’an is rapidly decreasing, starting the month at 2.7 inches, when it rarely exceeds 5.7 inches or falls below 0.9 inches, and ending the month at 1.1 inches, when it rarely exceeds 2.0 inches or falls below 0.3 inches.

Average Monthly Rainfall in October 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 October in Xi’an, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 1 minute, implying an average daily decrease of 2 minutes, 2 seconds, and weekly decrease of 14 minutes, 12 seconds.

The shortest day of the month is October 31, with 10 hours, 49 minutes of daylight and the longest day is October 1, with 11 hours, 50 minutes of daylight.

Hours of Daylight and Twilight in October 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 earliest sunrise of the month in Xi’an is 6:38 AM on October 1 and the latest sunrise is 24 minutes later at 7:03 AM on October 31.

The latest sunset is 6:28 PM on October 1 and the earliest sunset is 36 minutes earlier at 5:52 PM on October 31.

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 October in Xi’an

The solar day over the course of October. 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 October in Xi’an

Solar Elevation and Azimuth in October in Xi’anOct112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMSepNov001010202020303040405000010102020303030405060
northeastsouthwest
Solar elevation and azimuth over the course of October 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 October 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 October in Xi’an

Moon Rise, Set & Phases in October in Xi’anOct112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMSepNovSep 39:56 AMSep 39:56 AMSep 1810:35 AMSep 1810:35 AMOct 32:50 AMOct 32:50 AMOct 177:27 PMOct 177:27 PMNov 18:48 PMNov 18:48 PMNov 165:29 AMNov 165:29 AM6:12 AM6:12 AM7:22 PM7:22 PM6:26 PM6:26 PM6:20 AM6:20 AM6:53 AM6:53 AM6:36 PM6:36 PM5:54 PM5:54 PM7:33 AM7:33 AM6:40 AM6:40 AM5:31 PM5:31 PM4:58 PM4:58 PM7:36 AM7:36 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.
Oct 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
2%5:02 AME5:50 PMW-11:28 AMS252,023 mi
2
0%5:58 AME6:13 PMW-12:07 PMS252,512 mi
3
0%6:53 AME6:36 PMW-12:45 PMS252,568 mi
4
2%7:49 AMESE7:00 PMWSW-1:25 PMS252,193 mi
5
5%8:46 AMESE7:27 PMWSW-2:07 PMS251,366 mi
6
11%9:45 AMESE7:58 PMWSW-2:52 PMS250,053 mi
7
18%10:46 AMESE8:35 PMWSW-3:41 PMS248,219 mi
8
26%11:47 AMSE9:20 PMSW-4:33 PMS245,839 mi
9
36%12:46 PMSE10:13 PMSW-5:29 PMS242,927 mi
10
46%1:41 PMSE11:13 PMSW-6:27 PMS239,553 mi
11
50%2:30 PMESE--7:25 PMS235,857 mi
12
68%-12:20 AMWSW3:12 PMESE8:21 PMS232,061 mi
13
79%-1:30 AMWSW3:49 PMESE9:15 PMS228,453 mi
14
88%-2:41 AMWSW4:22 PMESE10:07 PMS225,367 mi
15
95%-3:53 AMW4:52 PME10:57 PMS223,133 mi
16
99%-5:05 AMW5:23 PME11:48 PMS222,025 mi
17
100%-6:18 AMW5:54 PMENE--
18
100%-7:33 AMWNW6:29 PMENE12:40 AMS222,202 mi
19
98%-8:49 AMWNW7:08 PMENE1:35 AMS223,671 mi
20
92%-10:05 AMWNW7:55 PMENE2:33 AMS226,281 mi
21
85%-11:17 AMNW8:49 PMNE3:34 AMS229,745 mi
22
75%-12:21 PMNW9:50 PMNE4:35 AMS233,701 mi
23
65%-1:15 PMNW10:54 PMENE5:34 AMS237,774 mi
24
50%-1:59 PMWNW11:58 PMENE6:30 AMS241,638 mi
25
44%-2:35 PMWNW-7:20 AMS245,049 mi
26
34%1:00 AMENE3:05 PMWNW-8:06 AMS247,854 mi
27
25%1:59 AMENE3:31 PMWNW-8:48 AMS249,977 mi
28
17%2:57 AME3:55 PMW-9:28 AMS251,408 mi
29
10%3:52 AME4:18 PMW-10:07 AMS252,184 mi
30
5%4:47 AME4:40 PMW-10:45 AMS252,371 mi
31
2%5:43 AME5:04 PMWSW-11:24 AMS252,048 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 decreasing during October, falling from 3% to 0% 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 October in Xi’an

Humidity Comfort Levels in October in Xi’anOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%SepNovOct 13%Oct 13%Oct 310%Oct 310%Oct 110%Oct 110%Oct 210%Oct 210%muggymuggyhumidhumiddrydrycomfortablecomfortableoppressiveoppressive
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 October, remaining within 0.1 miles per hour of 4.5 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 lowest daily average wind speed during October is 4.4 miles per hour on October 15.

Average Wind Speed in October in Xi’an

Average Wind Speed in October in Xi’anOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mphSepNovOct 154.4 mphOct 154.4 mphOct 14.5 mphOct 14.5 mphOct 314.6 mphOct 314.6 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Xi’an during October is predominantly out of the east from October 1 to October 19, the south from October 19 to October 22, and the west from October 22 to October 31.

Wind Direction in October in Xi’an

Wind Direction in October in Xi’anESWOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%SepNovwestsoutheastnorth
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 October in Xi’an is more likely than not fully within the growing season, with the chance that a given day is in the growing season decreasing from 100% to 87% over the course of the month.

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

Time Spent in Various Temperature Bands and the Growing Season in October in Xi’angrowing seasonOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SepNov100%Oct 1100%Oct 187%Oct 3187%Oct 3199%Oct 1199%Oct 1196%Oct 2196%Oct 2150%Nov 1850%Nov 18very coldcoldcoolcomfortablewarmfreezinghot
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 October, increasing by 274°F, from 4,169°F to 4,442°F, over the course of the month.

Growing Degree Days in October in Xi’an

Growing Degree Days in October in Xi’anOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031313,900°F3,900°F4,000°F4,000°F4,100°F4,100°F4,200°F4,200°F4,300°F4,300°F4,400°F4,400°F4,500°F4,500°F4,600°F4,600°F4,700°F4,700°FSepNovOct 14,169°FOct 14,169°FOct 314,442°FOct 314,442°FOct 114,291°FOct 114,291°FOct 214,381°FOct 214,381°F
The average growing degree days accumulated over the course of October, 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 decreasing during October, falling by 0.7 kWh, from 4.1 kWh to 3.5 kWh, over the course of the month.

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

Average Daily Incident Shortwave Solar Energy in October in Xi’anOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhSepNovOct 14.1 kWhOct 14.1 kWhOct 313.5 kWhOct 313.5 kWhOct 113.9 kWhOct 113.9 kWhOct 213.7 kWhOct 213.7 kWh
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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