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Built 2026-10-15 (15 October 2026)

Lang Son Weather Records (VMM00048830)

Record envelope, standing records and threshold days for Lang Son (VMM00048830), Vietnam, with 53 years of record.

Key Facts for Lang Son

  • Lang Son (VMM00048830) is a weather station in Vietnam at 21.83 latitude and 106.77 longitude, 263 m (863 ft) above sea level.
  • The station reports from 1974 to 2026, 53 years of record.
  • 1,464 records set at Lang Son still stand.
  • Records are tracked for tmin, prcp: an element needs 30 years of data to be eligible.
  • Lang Son set a monthly record high minimum temperature of 26.1 C (79.0 F) on 29 September 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Vietnam, 21.83 latitude, 106.77 longitude.
  • Elevation: 263 m (863 ft).
  • Period of record: 1974 to 2026, 53 years.
  • Eligible elements: tmin, prcp.

Daily Record Envelope and 2026

8 days at or beyond a record
Daily record high and record low at Lang Son, with 2026 drawn through them The band shows the record high and record low for each calendar day at Lang Son. The lines show the 2026 daily maximum and minimum. 8 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -10010203040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Lang Son. The lines show the 2026 daily maximum and minimum. 8 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Lang Son, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan29.4 C (84.9 F)0.2 C (32.4 F)24.7 C (76.5 F)5.6 C (42.1 F)
Feb33.5 C (92.3 F)1.8 C (35.2 F)27.0 C (80.6 F)8.0 C (46.4 F)
Mar35.2 C (95.4 F)5.0 C (41.0 F)29.1 C (84.4 F)12.9 C (55.2 F)
Apr38.6 C (101.5 F)9.4 C (48.9 F)33.9 C (93.0 F)18.0 C (64.4 F)
May38.4 C (101.1 F)13.7 C (56.7 F)36.2 C (97.2 F)17.9 C (64.2 F)
Jun38.6 C (101.5 F)17.8 C (64.0 F)36.0 C (96.8 F)23.2 C (73.8 F)
Jul37.0 C (98.6 F)19.2 C (66.6 F)34.0 C (93.2 F)24.2 C (75.6 F)
Aug37.7 C (99.9 F)20.0 C (68.0 F)35.1 C (95.2 F)23.4 C (74.1 F)
Sep39.8 C (103.6 F)14.4 C (57.9 F)33.8 C (92.8 F)22.4 C (72.3 F)
Oct35.7 C (96.3 F)8.5 C (47.3 F)n/an/a
Nov32.0 C (89.6 F)1.0 C (33.8 F)n/an/a
Dec30.0 C (86.0 F)-2.5 C (27.5 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Lang Son by the year they were set 1,464 records at Lang Son still stand. 2025 holds the most, with 72. 0204060801974: 11975: 41976: 141992: 221993: 451994: 451995: 301996: 491997: 381998: 471999: 322000: 462001: 472002: 412003: 302004: 522005: 372006: 472007: 442008: 432009: 532010: 582011: 472012: 382013: 392014: 502015: 332016: 312017: 232018: 242019: 512020: 312021: 352022: 392023: 462024: 452025: 722026: 351974199319972001200520092013201720212025
1,464 records at Lang Son still stand. 2025 holds the most, with 72.
Standing records at Lang Son by the year they were set
Year setStanding records
19741
19754
197614
199222
199345
199445
199530
199649
199738
199847
199932
200046
200147
200241
200330
200452
200537
200647
200744
200843
200953
201058
201147
201238
201339
201450
201533
201631
201723
201824
201951
202031
202135
202239
202346
202445
202572
202635

All-Time Record Progression

1 new records
When Lang Son set new all-time records 1 all-time records were set at Lang Son between 4 August 2025 and 4 August 2025. Each dot is a new record. Record high minimum temperature4 August 2025: Record high minimum temperature 27.8 C (82.0 F)2025
1 all-time records were set at Lang Son between 4 August 2025 and 4 August 2025. Each dot is a new record.
When Lang Son set new all-time records
DateKindDetail
2025-08-04Record high minimum temperatureRecord high minimum temperature 27.8 C (82.0 F)

Wettest Day of Each Month

Aug: 445.0 mm (17.5 in)
Record daily precipitation for each month at Lang Son The wettest day on record for each calendar month at Lang Son. The most was 445.0 mm (17.5 in) on 15 August 1995. 0200400600 Jan: 105.2 mm (4.1 in), 21 January 2005 Jan Feb: 62.0 mm (2.4 in), 5 February 2023 Feb Mar: 103.1 mm (4.1 in), 28 March 1996 Mar Apr: 140.2 mm (5.5 in), 8 April 2006 Apr May: 184.4 mm (7.3 in), 10 May 2022 May Jun: 230.1 mm (9.1 in), 11 June 1994 Jun Jul: 188.0 mm (7.4 in), 30 July 2024 Jul Aug: 445.0 mm (17.5 in), 15 August 1995 Aug Sep: 228.6 mm (9.0 in), 17 September 2014 Sep Oct: 109.0 mm (4.3 in), 15 October 2020 Oct Nov: 148.1 mm (5.8 in), 11 November 2013 Nov Dec: 41.4 mm (1.6 in), 18 December 2004 Dec
The wettest day on record for each calendar month at Lang Son. The most was 445.0 mm (17.5 in) on 15 August 1995.
Record daily precipitation for each month at Lang Son
MonthRecord daily precipitation (mm)Date
Jan105.2 mm (4.1 in)21 January 2005
Feb62.0 mm (2.4 in)5 February 2023
Mar103.1 mm (4.1 in)28 March 1996
Apr140.2 mm (5.5 in)8 April 2006
May184.4 mm (7.3 in)10 May 2022
Jun230.1 mm (9.1 in)11 June 1994
Jul188.0 mm (7.4 in)30 July 2024
Aug445.0 mm (17.5 in)15 August 1995
Sep228.6 mm (9.0 in)17 September 2014
Oct109.0 mm (4.3 in)15 October 2020
Nov148.1 mm (5.8 in)11 November 2013
Dec41.4 mm (1.6 in)18 December 2004

Period of Record Coverage

1974 to 2026
Days with data per year at Lang Son 40 years of record at Lang Son, 1974 to 2026. 25 years have data for under 90 percent of days and are left out of rankings: 1974, 1975, 1976, 1977, 1979, 1992, 1993, 1994 and others. 1974: 31 of 365 days1975: 67 of 365 days1976: 77 of 366 days1977: 1 of 365 days1979: 1 of 365 days1992: 132 of 366 days1993: 302 of 365 days1994: 317 of 365 days1995: 278 of 365 days1996: 305 of 366 days1997: 313 of 365 days1998: 307 of 365 days1999: 323 of 365 days2000: 346 of 366 days2001: 343 of 365 days2002: 339 of 365 days2003: 346 of 365 days2004: 348 of 366 days2005: 337 of 365 days2006: 339 of 365 days2007: 348 of 365 days2008: 337 of 366 days2009: 318 of 365 days2010: 336 of 365 days2011: 344 of 365 days2012: 354 of 366 days2013: 346 of 365 days2014: 344 of 365 days2015: 92 of 365 days2016: 79 of 366 days2017: 62 of 365 days2018: 99 of 365 days2019: 223 of 365 days2020: 86 of 366 days2021: 135 of 365 days2022: 250 of 365 days2023: 129 of 365 days2024: 187 of 366 days2025: 352 of 365 days2026: 168 of 365 days19751995200020052010201520202025
40 years of record at Lang Son, 1974 to 2026. 25 years have data for under 90 percent of days and are left out of rankings: 1974, 1975, 1976, 1977, 1979, 1992, 1993, 1994 and others.
Days with data per year at Lang Son
YearDays with dataShare of yearComplete
1974318%No
19756718%No
19767721%No
197710%No
197910%No
199213236%No
199330283%No
199431787%No
199527876%No
199630583%No
199731386%No
199830784%No
199932388%No
200034695%Yes
200134394%Yes
200233993%Yes
200334695%Yes
200434895%Yes
200533792%Yes
200633993%Yes
200734895%Yes
200833792%Yes
200931887%No
201033692%Yes
201134494%Yes
201235497%Yes
201334695%Yes
201434494%Yes
20159225%No
20167922%No
20176217%No
20189927%No
201922361%No
20208623%No
202113537%No
202225068%No
202312935%No
202418751%No
202535296%Yes
202616846%No

Latest Records

20
Latest records at Lang Son
DateStationRecordValueBeat old record byOld record stoodSignificance
29 September 2026Lang Son, VNmonthly high min (Provisional)26.1 C (79.0 F)0.1 C (0.2 F)2 years15 of 100 (Routine)
28 September 2026Lang Son, VNdaily high min (Provisional)25.2 C (77.4 F)0.4 C (0.7 F)1 year7 of 100 (Routine)
22 September 2026Lang Son, VNdaily high min (Provisional)24.7 C (76.5 F)0.1 C (0.2 F)5 years6 of 100 (Routine)
25 August 2026Lang Son, VNdaily high min (Provisional)25.6 C (78.1 F)0.6 C (1.1 F)21 years17 of 100 (Routine)
24 August 2026Lang Son, VNdaily high min (Provisional)25.2 C (77.4 F)0.2 C (0.4 F)5 years8 of 100 (Routine)
23 August 2026Lang Son, VNdaily high min (Provisional)25.0 C (77.0 F)0.4 C (0.7 F)21 years15 of 100 (Routine)
20 August 2026Lang Son, VNdaily high min (Tie, Provisional)25.1 C (77.2 F)tie8 years1 of 100 (Routine)
13 August 2026Lang Son, VNdaily high min26.8 C (80.2 F)0.7 C (1.3 F)0 years12 of 100 (Routine)
27 July 2026Lang Son, VNdaily high min25.4 C (77.7 F)0.4 C (0.7 F)3 years8 of 100 (Routine)
24 June 2026Lang Son, VNmonthly high min27.7 C (81.9 F)0.2 C (0.4 F)0 years16 of 100 (Routine)
23 June 2026Lang Son, VNdaily high min26.6 C (79.9 F)0.9 C (1.6 F)4 years12 of 100 (Routine)
18 June 2026Lang Son, VNdaily high min27.3 C (81.1 F)0.8 C (1.4 F)16 years15 of 100 (Routine)
17 June 2026Lang Son, VNdaily high min26.3 C (79.3 F)0.2 C (0.4 F)16 years10 of 100 (Routine)
7 June 2026Lang Son, VNdaily high min26.9 C (80.4 F)0.3 C (0.5 F)28 years15 of 100 (Routine)
6 June 2026Lang Son, VNmonthly high min27.5 C (81.5 F)0.2 C (0.4 F)6 years18 of 100 (Routine)
2 June 2026Lang Son, VNdaily high min27.0 C (80.6 F)1.0 C (1.8 F)8 years14 of 100 (Routine)
28 May 2026Lang Son, VNdaily high min26.8 C (80.2 F)0.4 C (0.7 F)11 years9 of 100 (Routine)
27 May 2026Lang Son, VNdaily high min26.9 C (80.4 F)0.9 C (1.6 F)11 years11 of 100 (Routine)
26 May 2026Lang Son, VNmonthly high min27.7 C (81.9 F)0.5 C (0.9 F)0 years17 of 100 (Routine)
25 May 2026Lang Son, VNdaily high min26.7 C (80.1 F)0.9 C (1.6 F)31 years17 of 100 (Routine)

Extremes by Year

1974 to 2026
Yearly extremes at Lang Son: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)39.8 C (103.6 F)199336.3 C (97.3 F)40
Coldest night (TNn)-2.5 C (27.5 F)19992.8 C (37.1 F)40
Wettest day (Rx1day)445.0 mm (17.5 in)1995108.5 mm (4.3 in)33
Wettest five days (Rx5day)453.2 mm (17.8 in)1995166.1 mm (6.5 in)33
Longest dry spell (CDD)58 days200325 days33

Hottest day (TXx)

Hottest day (TXx) at Lang Son by year The hottest day of the year at Lang Son, 1974 to 2026. The record is 39.8 C (103.6 F) in 1993, marked on the chart; the median year is 36.3 C (97.3 F). 202530354019801990200020102020Record: 39.8 C (103.6 F) in 1993
The hottest day of the year at Lang Son, 1974 to 2026. The record is 39.8 C (103.6 F) in 1993, marked on the chart; the median year is 36.3 C (97.3 F).
Hottest day (TXx) at Lang Son by year
YearHottest day (TXx)
197431.0 C (87.8 F)
197535.0 C (95.0 F)
197636.0 C (96.8 F)
197728.0 C (82.4 F)
197920.0 C (68.0 F)
199235.7 C (96.3 F)
199339.8 C (103.6 F)
199437.4 C (99.3 F)
199535.2 C (95.4 F)
199635.2 C (95.4 F)
199735.2 C (95.4 F)
199837.0 C (98.6 F)
199936.4 C (97.5 F)
200036.3 C (97.3 F)
200138.6 C (101.5 F)
200235.5 C (95.9 F)
200337.6 C (99.7 F)
200436.8 C (98.2 F)
200536.5 C (97.7 F)
200635.9 C (96.6 F)
200736.1 C (97.0 F)
200835.8 C (96.4 F)
200935.4 C (95.7 F)
201036.5 C (97.7 F)
201136.2 C (97.2 F)
201238.4 C (101.1 F)
201337.2 C (99.0 F)
201436.4 C (97.5 F)
201536.0 C (96.8 F)
201636.0 C (96.8 F)
201736.8 C (98.2 F)
201836.4 C (97.5 F)
201937.1 C (98.8 F)
202035.1 C (95.2 F)
202137.7 C (99.9 F)
202236.5 C (97.7 F)
202336.3 C (97.3 F)
202438.6 C (101.5 F)
202535.6 C (96.1 F)
202636.2 C (97.2 F)

Coldest night (TNn)

Coldest night (TNn) at Lang Son by year The coldest night of the year at Lang Son, 1974 to 2026. The record is -2.5 C (27.5 F) in 1999, marked on the chart; the median year is 2.8 C (37.1 F). -10010203019801990200020102020Record: -2.5 C (27.5 F) in 1999
The coldest night of the year at Lang Son, 1974 to 2026. The record is -2.5 C (27.5 F) in 1999, marked on the chart; the median year is 2.8 C (37.1 F).
Coldest night (TNn) at Lang Son by year
YearColdest night (TNn)
19748.0 C (46.4 F)
19750.0 C (32.0 F)
19763.0 C (37.4 F)
197721.0 C (69.8 F)
19798.0 C (46.4 F)
19921.0 C (33.8 F)
19930.4 C (32.7 F)
19946.1 C (43.0 F)
1995-0.3 C (31.5 F)
19960.5 C (32.9 F)
19973.7 C (38.7 F)
19985.5 C (41.9 F)
1999-2.5 C (27.5 F)
20002.8 C (37.0 F)
20011.6 C (34.9 F)
20023.9 C (39.0 F)
20033.1 C (37.6 F)
20042.9 C (37.2 F)
20051.3 C (34.3 F)
20062.5 C (36.5 F)
20071.8 C (35.2 F)
20081.8 C (35.2 F)
20090.7 C (33.3 F)
20103.9 C (39.0 F)
20110.8 C (33.4 F)
20124.7 C (40.5 F)
20131.5 C (34.7 F)
20140.3 C (32.5 F)
20153.4 C (38.1 F)
20161.8 C (35.2 F)
20174.5 C (40.1 F)
20185.3 C (41.5 F)
20190.2 C (32.4 F)
20205.7 C (42.3 F)
20211.6 C (34.9 F)
20223.3 C (37.9 F)
20232.6 C (36.7 F)
20244.0 C (39.2 F)
20253.2 C (37.8 F)
20265.6 C (42.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Lang Son by year The wettest day of the year at Lang Son, 1974 to 2026. The record is 445.0 mm (17.5 in) in 1995, marked on the chart; the median year is 108.5 mm (4.3 in). 020040060019801990200020102020Record: 445.0 mm (17.5 in) in 1995
The wettest day of the year at Lang Son, 1974 to 2026. The record is 445.0 mm (17.5 in) in 1995, marked on the chart; the median year is 108.5 mm (4.3 in).
Wettest day (Rx1day) at Lang Son by year
YearWettest day (Rx1day)
1974n/a
1975n/a
1976n/a
1977n/a
1979n/a
199216.0 mm (0.6 in)
199334.0 mm (1.3 in)
1994230.1 mm (9.1 in)
1995445.0 mm (17.5 in)
1996103.1 mm (4.1 in)
199764.0 mm (2.5 in)
199868.1 mm (2.7 in)
1999100.8 mm (4.0 in)
200083.8 mm (3.3 in)
2001110.0 mm (4.3 in)
200288.4 mm (3.5 in)
2003103.1 mm (4.1 in)
2004110.7 mm (4.4 in)
2005105.2 mm (4.1 in)
2006140.2 mm (5.5 in)
200791.2 mm (3.6 in)
2008215.1 mm (8.5 in)
200980.8 mm (3.2 in)
2010123.2 mm (4.9 in)
2011116.3 mm (4.6 in)
2012142.0 mm (5.6 in)
2013148.1 mm (5.8 in)
2014228.6 mm (9.0 in)
2015108.5 mm (4.3 in)
201665.0 mm (2.6 in)
201758.2 mm (2.3 in)
2018170.9 mm (6.7 in)
201992.7 mm (3.6 in)
2020109.0 mm (4.3 in)
2021101.1 mm (4.0 in)
2022184.4 mm (7.3 in)
2023128.0 mm (5.0 in)
2024188.0 mm (7.4 in)
2025n/a
2026n/a

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Lang Son by year The wettest five days of the year at Lang Son, 1974 to 2026. The record is 453.2 mm (17.8 in) in 1995, marked on the chart; the median year is 166.1 mm (6.5 in). 020040060019801990200020102020Record: 453.2 mm (17.8 in) in 1995
The wettest five days of the year at Lang Son, 1974 to 2026. The record is 453.2 mm (17.8 in) in 1995, marked on the chart; the median year is 166.1 mm (6.5 in).
Wettest five days (Rx5day) at Lang Son by year
YearWettest five days (Rx5day)
1974n/a
1975n/a
1976n/a
1977n/a
1979n/a
19920.0 mm (0.00 in)
199311.9 mm (0.5 in)
1994230.1 mm (9.1 in)
1995453.2 mm (17.8 in)
1996182.8 mm (7.2 in)
1997104.2 mm (4.1 in)
199886.1 mm (3.4 in)
1999103.8 mm (4.1 in)
2000125.3 mm (4.9 in)
200192.0 mm (3.6 in)
2002108.2 mm (4.3 in)
2003159.7 mm (6.3 in)
2004161.8 mm (6.4 in)
2005166.1 mm (6.5 in)
2006281.7 mm (11.1 in)
200796.0 mm (3.8 in)
2008359.4 mm (14.1 in)
200989.1 mm (3.5 in)
2010184.4 mm (7.3 in)
2011141.5 mm (5.6 in)
2012167.0 mm (6.6 in)
2013174.5 mm (6.9 in)
2014286.8 mm (11.3 in)
2015204.4 mm (8.0 in)
2016187.8 mm (7.4 in)
2017134.9 mm (5.3 in)
2018280.9 mm (11.1 in)
2019202.2 mm (8.0 in)
2020135.7 mm (5.3 in)
2021146.6 mm (5.8 in)
2022296.9 mm (11.7 in)
2023243.1 mm (9.6 in)
2024270.7 mm (10.7 in)
2025n/a
2026n/a

Longest dry spell (CDD)

Longest dry spell (CDD) at Lang Son by year The longest dry spell of the year at Lang Son, 1974 to 2026. The record is 58 days in 2003, marked on the chart; the median year is 25 days. 020406019801990200020102020Record: 58 days in 2003
The longest dry spell of the year at Lang Son, 1974 to 2026. The record is 58 days in 2003, marked on the chart; the median year is 25 days.
Longest dry spell (CDD) at Lang Son by year
YearLongest dry spell (CDD)
1974n/a
1975n/a
1976n/a
1977n/a
1979n/a
199211 days
199328 days
199415 days
199519 days
199625 days
199724 days
199822 days
199910 days
200028 days
200124 days
200217 days
200358 days
200427 days
200522 days
200626 days
200742 days
200816 days
200937 days
201021 days
201130 days
201221 days
201322 days
201434 days
201522 days
201626 days
201721 days
201829 days
201936 days
202027 days
202141 days
202227 days
202322 days
202425 days
2025n/a
2026n/a

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Download the Data

  • Data for Lang Son standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Lang Son threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-13).