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May Weather in Bắc Hà Vietnam

Daily high temperatures are around 81°F, rarely falling below 74°F or exceeding 89°F.

Daily low temperatures increase by 4°F, from 63°F to 66°F, rarely falling below 57°F or exceeding 69°F.

For reference, on June 25, the hottest day of the year, temperatures in Bắc Hà typically range from 68°F to 82°F, while on January 2, the coldest day of the year, they range from 43°F to 60°F.

Average High and Low Temperature in May in Bắc Hà

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 May. 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 May in Bắc Hà

Average Hourly Temperature in May in Bắc HàMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMAprJuncoolcoolcomfortablecomfortablewarm
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.

Trancas, Argentina (11,747 miles away); Córdoba, Argentina (11,513 miles); and Coutts Crossing, Australia (4,853 miles) are the far-away foreign places with temperatures most similar to Bắc Hà (view comparison).

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The month of May in Bắc Hà experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 53% to 81%.

The clearest day of the month is May 1, with clear, mostly clear, or partly cloudy conditions 47% of the time.

For reference, on July 6, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 89%, while on December 8, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 69%.

Cloud Cover Categories in May in Bắc Hà

Cloud Cover Categories in May in Bắc HàMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJunMay 147%May 147%May 3119%May 3119%May 1138%May 1138%May 2127%May 2127%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 Bắc Hà, the chance of a wet day over the course of May is very rapidly increasing, starting the month at 35% and ending it at 44%.

For reference, the year's highest daily chance of a wet day is 61% on August 2, and its lowest chance is 5% on January 29.

Probability of Precipitation in May in Bắc Hà

Probability of Precipitation in May in Bắc HàMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%45%45%50%50%55%55%AprJunMay 135%May 135%May 3144%May 3144%May 1140%May 1140%May 2142%May 2142%rain
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 May in Bắc Hà is rapidly increasing, starting the month at 4.0 inches, when it rarely exceeds 7.2 inches or falls below 1.6 inches, and ending the month at 5.8 inches, when it rarely exceeds 9.6 inches or falls below 2.9 inches.

Average Monthly Rainfall in May in Bắc Hà

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 May in Bắc Hà, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 26 minutes, implying an average daily increase of 52 seconds, and weekly increase of 6 minutes, 1 second.

The shortest day of the month is May 1, with 12 hours, 59 minutes of daylight and the longest day is May 31, with 13 hours, 25 minutes of daylight.

Hours of Daylight and Twilight in May in Bắc Hà

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 Bắc Hà is 5:30 AM on May 1 and the earliest sunrise is 12 minutes earlier at 5:18 AM on May 31.

The earliest sunset is 6:29 PM on May 1 and the latest sunset is 13 minutes later at 6:43 PM on May 31.

Daylight saving time is not observed in Bắc Hà during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:18 AM and sets 13 hours, 31 minutes later, at 6:50 PM, while on December 21, the shortest day of the year, it rises at 6:38 AM and sets 10 hours, 45 minutes later, at 5:23 PM.

Sunrise & Sunset with Twilight in May in Bắc Hà

The solar day over the course of May. 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 May in Bắc Hà

Solar Elevation and Azimuth in May in Bắc HàMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMAprJun001010202020303040405050506060707080800001010202030303040405050606060707080
northeastsouthwest
Solar elevation and azimuth over the course of May 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 May 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 May in Bắc Hà

Moon Rise, Set & Phases in May in Bắc HàMay112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAprJunApr 91:22 AMApr 91:22 AMApr 246:50 AMApr 246:50 AMMay 810:23 AMMay 810:23 AMMay 238:54 PMMay 238:54 PMJun 67:38 PMJun 67:38 PMJun 228:09 AMJun 228:09 AM5:58 AM5:58 AM7:02 PM7:02 PM5:56 PM5:56 PM5:32 AM5:32 AM5:12 AM5:12 AM6:53 PM6:53 PM6:34 PM6:34 PM5:28 AM5:28 AM4:38 AM4:38 AM6:46 PM6:46 PM6:23 PM6:23 PM5:06 AM5:06 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.
May 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
50%12:29 AMESE11:28 AMWSW-5:59 AMS233,395 mi
2
44%1:15 AMESE12:32 PMWSW-6:54 AMS230,966 mi
3
33%1:57 AMESE1:35 PMWSW-7:46 AMS228,784 mi
4
22%2:36 AME2:37 PMW-8:36 AMS227,041 mi
5
13%3:13 AME3:39 PMW-9:25 AMS225,946 mi
6
6%3:50 AME4:42 PMW-10:14 AMS225,680 mi
7
1%4:29 AMENE5:46 PMWNW-11:05 AMS226,364 mi
8
0%5:12 AMENE6:53 PMWNW-11:59 AMS228,016 mi
9
2%5:58 AMENE7:59 PMWNW-12:56 PMN230,539 mi
10
6%6:50 AMENE9:04 PMWNW-1:56 PMN233,726 mi
11
13%7:47 AMENE10:05 PMWNW-2:56 PMN237,290 mi
12
21%8:46 AMENE10:58 PMWNW-3:54 PMN240,913 mi
13
30%9:46 AMENE11:45 PMWNW-4:47 PMN244,291 mi
14
40%10:44 AMENE--5:37 PMS247,173 mi
15
50%-12:25 AMWNW11:39 AMENE6:22 PMS249,379 mi
16
60%-1:00 AMWNW12:31 PMENE7:03 PMS250,802 mi
17
69%-1:32 AMWNW1:21 PME7:43 PMS251,406 mi
18
78%-2:02 AMW2:10 PME8:21 PMS251,220 mi
19
85%-2:31 AMW2:59 PME9:00 PMS250,329 mi
20
91%-3:00 AMW3:49 PME9:40 PMS248,855 mi
21
96%-3:32 AMWSW4:41 PMESE10:23 PMS246,947 mi
22
99%-4:06 AMWSW5:36 PMESE11:10 PMS244,759 mi
23
100%-4:44 AMWSW6:34 PMESE--
24
100%-5:28 AMWSW7:34 PMESE12:01 AMS242,445 mi
25
98%-6:19 AMWSW8:35 PMESE12:56 AMS240,134 mi
26
95%-7:16 AMWSW9:32 PMESE1:55 AMS237,926 mi
27
88%-8:18 AMWSW10:26 PMESE2:55 AMS235,886 mi
28
80%-9:22 AMWSW11:14 PMESE3:54 AMS234,047 mi
29
70%-10:26 AMWSW11:57 PMESE4:50 AMS232,424 mi
30
59%-11:28 AMWSW-5:43 AMS231,035 mi
31
50%12:36 AMESE12:29 PMW-6:32 AMS229,913 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 Bắc Hà is very rapidly increasing during May, rising from 50% to 84% over the course of the month.

For reference, on July 24, the muggiest day of the year, there are muggy conditions 99% of the time, while on January 2, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in May in Bắc Hà

Humidity Comfort Levels in May in Bắc HàMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AprJunMay 150%May 150%May 3184%May 3184%May 1163%May 1163%May 2176%May 2176%oppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydry
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 Bắc Hà is essentially constant during May, remaining within 0.1 miles per hour of 3.8 miles per hour throughout.

For reference, on March 10, the windiest day of the year, the daily average wind speed is 4.4 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 3.4 miles per hour.

Average Wind Speed in May in Bắc Hà

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 Bắc Hà throughout May is predominantly from the east, with a peak proportion of 53% on May 17.

Wind Direction in May in Bắc Hà

Wind Direction in May in Bắc HàESMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%AprJunwestsoutheastnorth
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 Bắc Hà over some winters. The day least likely to be in the growing season is January 9, with a 78% chance.

Time Spent in Various Temperature Bands and the Growing Season in May in Bắc Hà

Time Spent in Various Temperature Bands and the Growing Season in May in Bắc Hàgrowing seasonMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJun100%May 16100%May 16coldcoolcomfortablewarmhot
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 Bắc Hà are rapidly increasing during May, increasing by 660°F, from 1,254°F to 1,913°F, over the course of the month.

Growing Degree Days in May in Bắc Hà

Growing Degree Days in May in Bắc HàMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031311,100°F1,100°F1,200°F1,200°F1,300°F1,300°F1,400°F1,400°F1,500°F1,500°F1,600°F1,600°F1,700°F1,700°F1,800°F1,800°F1,900°F1,900°F2,000°F2,000°FAprJunMay 11,254°FMay 11,254°FMay 311,913°FMay 311,913°FMay 111,467°FMay 111,467°FMay 211,687°FMay 211,687°F
The average growing degree days accumulated over the course of May, 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 Bắc Hà is gradually decreasing during May, falling by 0.6 kWh, from 5.8 kWh to 5.2 kWh, over the course of the month.

The highest average daily incident shortwave solar energy during May is 5.8 kWh on May 1.

Average Daily Incident Shortwave Solar Energy in May in Bắc Hà

Average Daily Incident Shortwave Solar Energy in May in Bắc HàMay11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhAprJunMay 15.8 kWhMay 15.8 kWhMay 315.2 kWhMay 315.2 kWhMay 115.7 kWhMay 115.7 kWhMay 215.4 kWhMay 215.4 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 Bắc Hà are 22.539 deg latitude, 104.293 deg longitude, and 2,979 ft elevation.

The topography within 2 miles of Bắc Hà contains very significant variations in elevation, with a maximum elevation change of 1,640 feet and an average elevation above sea level of 3,348 feet. Within 10 miles contains very significant variations in elevation (5,633 feet). Within 50 miles also contains extreme variations in elevation (10,095 feet).

The area within 2 miles of Bắc Hà is covered by cropland (51%), trees (27%), and shrubs (12%), within 10 miles by trees (43%) and cropland (41%), and within 50 miles by trees (50%) and cropland (24%).

This report illustrates the typical weather in Bắc Hà, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Bắc Hà is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . 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.

The temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Bắc Hà, according to the International Standard Atmosphere .

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.

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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