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January Weather in Jiannan China

Daily high temperatures are around 49°F, rarely falling below 40°F or exceeding 59°F. The lowest daily average high temperature is 48°F on January 18.

Daily low temperatures are around 39°F, rarely falling below 32°F or exceeding 46°F. The lowest daily average low temperature is 39°F on January 16.

For reference, on July 30, the hottest day of the year, temperatures in Jiannan typically range from 73°F to 86°F, while on January 16, the coldest day of the year, they range from 39°F to 48°F.

Average High and Low Temperature in January in Jiannan

Average High and Low Temperature in January in JiannanJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313130°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°FDecFebJan 1448°FJan 1448°F39°F39°FJan 149°FJan 149°F39°F39°FJan 3150°FJan 3150°F40°F40°F
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 January. 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 January in Jiannan

Average Hourly Temperature in January in JiannanJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMDecFebvery coldvery coldcold
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.

Wanchese, North Carolina, United States (7,803 miles away) and Ulcinj, Montenegro (4,580 miles) are the far-away foreign places with temperatures most similar to Jiannan (view comparison).

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The month of January in Jiannan experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 21% to 30%.

The clearest day of the month is January 1, with clear, mostly clear, or partly cloudy conditions 79% of the time.

For reference, on July 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 60%, while on December 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 80%.

Cloud Cover Categories in January in Jiannan

Cloud Cover Categories in January in JiannanJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%DecFebJan 179%Jan 179%Jan 3170%Jan 3170%Jan 1177%Jan 1177%Jan 2173%Jan 2173%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.

Over the course of January in Jiannan, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 31 minutes, implying an average daily increase of 1 minute, 2 seconds, and weekly increase of 7 minutes, 12 seconds.

The shortest day of the month is January 1, with 10 hours, 9 minutes of daylight and the longest day is January 31, with 10 hours, 40 minutes of daylight.

Hours of Daylight and Twilight in January in Jiannan

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 Jiannan is 8:03 AM on January 10 and the earliest sunrise is 6 minutes earlier at 7:56 AM on January 31.

The earliest sunset is 6:10 PM on January 1 and the latest sunset is 26 minutes later at 6:36 PM on January 31.

Daylight saving time is not observed in Jiannan during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:59 AM and sets 14 hours, 11 minutes later, at 8:10 PM, while on December 21, the shortest day of the year, it rises at 7:58 AM and sets 10 hours, 7 minutes later, at 6:04 PM.

Sunrise & Sunset with Twilight in January in Jiannan

The solar day over the course of January. 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 January in Jiannan

Solar Elevation and Azimuth in January in JiannanJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMDecFeb0010102020203030400001010202030303040
northeastsouthwest
Solar elevation and azimuth over the course of January 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 January 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 January in Jiannan

Moon Rise, Set & Phases in January in JiannanJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMDecFebDec 137:33 AMDec 137:33 AMDec 278:34 AMDec 278:34 AMJan 117:58 PMJan 117:58 PMJan 261:55 AMJan 261:55 AMFeb 107:00 AMFeb 107:00 AMFeb 248:31 PMFeb 248:31 PM8:10 AM8:10 AM6:06 PM6:06 PM5:14 PM5:14 PM8:20 AM8:20 AM7:58 AM7:58 AM5:56 PM5:56 PM5:59 PM5:59 PM8:32 AM8:32 AM8:12 AM8:12 AM7:11 PM7:11 PM6:46 PM6:46 PM8:05 AM8:05 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.
Jan 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
79%-11:34 AMWNW11:00 PME4:52 AMS251,385 mi
2
71%-12:00 PMW11:54 PME5:32 AMS251,577 mi
3
62%-12:25 PMW-6:11 AMS250,975 mi
4
50%12:47 AME12:50 PMW-6:50 AMS249,543 mi
5
42%1:42 AME1:16 PMWSW-7:30 AMS247,311 mi
6
32%2:39 AMESE1:45 PMWSW-8:12 AMS244,380 mi
7
23%3:39 AMESE2:19 PMWSW-8:59 AMS240,925 mi
8
14%4:43 AMESE3:00 PMWSW-9:51 AMS237,195 mi
9
7%5:49 AMESE3:49 PMWSW-10:49 AMS233,494 mi
10
2%6:56 AMESE4:49 PMWSW-11:52 AMS230,159 mi
11
0%7:58 AMESE5:56 PMWSW-12:57 PMS227,510 mi
12
1%8:53 AMESE7:09 PMWSW-2:02 PMS225,788 mi
13
5%9:40 AMESE8:23 PMWSW-3:02 PMS225,113 mi
14
11%10:20 AMESE9:35 PMWSW-3:57 PMS225,463 mi
15
20%10:55 AME10:44 PMW-4:49 PMS226,703 mi
16
30%11:27 AME11:50 PMW-5:37 PMS228,622 mi
17
42%11:58 AME--6:24 PMS230,988 mi
18
50%-12:55 AMW12:29 PMENE7:11 PMS233,582 mi
19
65%-2:00 AMWNW1:02 PMENE8:00 PMS236,229 mi
20
75%-3:05 AMWNW1:39 PMENE8:51 PMS238,809 mi
21
83%-4:10 AMWNW2:21 PMENE9:45 PMS241,251 mi
22
91%-5:13 AMWNW3:09 PMENE10:40 PMS243,521 mi
23
96%-6:13 AMWNW4:02 PMENE11:35 PMS245,602 mi
24
98%-7:06 AMWNW5:00 PMENE--
25
99%-7:52 AMWNW5:59 PMENE12:28 AMS247,481 mi
26
100%-8:32 AMWNW6:59 PMENE1:19 AMS249,129 mi
27
99%-9:06 AMWNW7:56 PMENE2:05 AMS250,494 mi
28
96%-9:35 AMWNW8:52 PMENE2:49 AMS251,502 mi
29
92%-10:02 AMW9:46 PME3:29 AMS252,060 mi
30
86%-10:27 AMW10:40 PME4:08 AMS252,067 mi
31
78%-10:51 AMW11:33 PME4:47 AMS251,429 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 Jiannan is essentially constant during January, remaining around 0% throughout.

For reference, on July 29, the muggiest day of the year, there are muggy conditions 89% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in January in Jiannan

Humidity Comfort Levels in January in JiannanJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%DecFebJan 10%Jan 10%Jan 310%Jan 310%Jan 110%Jan 110%Jan 210%Jan 210%drydry
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 Jiannan is essentially constant during January, remaining within 0.2 miles per hour of 4.3 miles per hour throughout.

For reference, on May 5, the windiest day of the year, the daily average wind speed is 5.8 miles per hour, while on December 16, the calmest day of the year, the daily average wind speed is 4.1 miles per hour.

Average Wind Speed in January in Jiannan

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 Jiannan throughout January is predominantly from the east, with a peak proportion of 43% on January 31.

Wind Direction in January in Jiannan

Wind Direction in January in JiannanJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%DecFebwesteastnorthsouth
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).

While it does not do so every year, freezing temperatures are seen in Jiannan over some winters. The day least likely to be in the growing season is January 14, with a 55% chance.

Time Spent in Various Temperature Bands and the Growing Season in January in Jiannan

Time Spent in Various Temperature Bands and the Growing Season in January in JiannanJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%DecFeb63%Jan 163%Jan 175%Jan 3175%Jan 3155%Jan 1155%Jan 1162%Jan 2162%Jan 2190%Feb 1890%Feb 18very coldcoldcool
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 Jiannan are essentially constant during January, remaining within 6°F of 6°F throughout.

Growing Degree Days in January in Jiannan

The average growing degree days accumulated over the course of January, 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 Jiannan is essentially constant during January, remaining within 0.2 kWh of 3.3 kWh throughout.

Average Daily Incident Shortwave Solar Energy in January in Jiannan

Average Daily Incident Shortwave Solar Energy in January in JiannanJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 kWh0.0 kWh0.5 kWh0.5 kWh1.0 kWh1.0 kWh1.5 kWh1.5 kWh2.0 kWh2.0 kWh2.5 kWh2.5 kWh3.0 kWh3.0 kWh3.5 kWh3.5 kWh4.0 kWh4.0 kWh4.5 kWh4.5 kWh5.0 kWh5.0 kWh5.5 kWh5.5 kWhDecFebJan 13.1 kWhJan 13.1 kWhJan 313.5 kWhJan 313.5 kWhJan 113.2 kWhJan 113.2 kWhJan 213.3 kWhJan 213.3 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 Jiannan are 31.344 deg latitude, 104.196 deg longitude, and 1,969 ft elevation.

The topography within 2 miles of Jiannan contains only modest variations in elevation, with a maximum elevation change of 194 feet and an average elevation above sea level of 1,962 feet. Within 10 miles contains only modest variations in elevation (5,797 feet). Within 50 miles also contains extreme variations in elevation (16,086 feet).

The area within 2 miles of Jiannan is covered by cropland (69%) and artificial surfaces (25%), within 10 miles by cropland (72%) and trees (18%), and within 50 miles by trees (41%) and cropland (34%).

This report illustrates the typical weather in Jiannan, 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, Chengdu Shuangliu International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Jiannan.

At a distance of 88 kilometers from Jiannan, 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 Jiannan 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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