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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Lang Son Threshold Days by Year (VMM00048830)

11 fixed thresholds counted per year at Lang Son (VMM00048830): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lang Son Thresholds

  • Lang Son: days with 10 mm (0.39 in) or more of precipitation in 25 years, most in 2013 with 51.
  • Lang Son: days with 25 mm (0.98 in) or more of precipitation in 25 years, most in 2005 with 17.
  • Lang Son: days with 50 mm (1.97 in) or more of precipitation in 25 years, most in 2008 with 9.
  • Lang Son: days with 100 mm (3.94 in) or more of precipitation in 18 years, most in 2006 with 2.
  • 11 fixed thresholds have at least one qualifying day at Lang Son.
16 years with a qualifying day
Days at or above 30 C (86 F) per year at Lang Son Days per year at Lang Son with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 138 in 2003. 0501001502000: 1272001: 1022002: 1232003: 1382004: 1082005: 1262006: 1322007: 1272008: 1232010: 1262011: 1112012: 1282013: 1222014: 1212025: 1022026: 6120002002200420062008201120132025
Days per year at Lang Son with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 138 in 2003.
Days at or above 30 C (86 F) per year at Lang Son
YearDaysDecade average
2000127122.9
2001102122.9
2002123122.9
2003138122.9
2004108122.9
2005126122.9
2006132122.9
2007127122.9
2008123122.9
2010126121.6
2011111121.6
2012128121.6
2013122121.6
2014121121.6
202510281.5
20266181.5
First to last qualifying date each year at Lang Son For each year, a bar from the first to the last day at Lang Son meeting 30 C (86 F). 2000: 29 March 2000 to 26 October 20002001: 8 April 2001 to 2 November 20012002: 15 March 2002 to 15 November 20022003: 3 March 2003 to 9 November 20032004: 1 March 2004 to 10 November 20042005: 8 April 2005 to 14 November 20052006: 4 April 2006 to 26 November 20062007: 22 February 2007 to 29 October 20072008: 29 March 2008 to 23 October 20082010: 9 February 2010 to 14 October 20102011: 26 April 2011 to 24 October 20112012: 12 April 2012 to 22 November 20122013: 1 March 2013 to 15 October 20132014: 30 March 2014 to 1 November 20142025: 4 March 2025 to 18 October 20252026: 6 April 2026 to 12 October 202620002002200420062008201120132025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Lang Son meeting 30 C (86 F).
First to last qualifying date each year at Lang Son
YearFirst dateLast date
20002000-03-292000-10-26
20012001-04-082001-11-02
20022002-03-152002-11-15
20032003-03-032003-11-09
20042004-03-012004-11-10
20052005-04-082005-11-14
20062006-04-042006-11-26
20072007-02-222007-10-29
20082008-03-292008-10-23
20102010-02-092010-10-14
20112011-04-262011-10-24
20122012-04-122012-11-22
20132013-03-012013-10-15
20142014-03-302014-11-01
20252025-03-042025-10-18
20262026-04-062026-10-12

Every Fixed Threshold

Fixed thresholds at Lang Son
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days16138200361
35 C (95 F): Days161320007
90 F (32.2 C): Days1675200743
100 F (37.8 C): Days2220122
20 C (68 F): Tropical nights (min21952025111
25 C (77 F): Days with min262202552
10 mm (0.39 in): Days with 10 mm or more rain2551201342
25 mm (0.98 in): Days with 25 mm or more rain2517200518
50 mm (1.97 in): Days with 50 mm or more rain25920084
100 mm (3.94 in): Days with 100 mm or more rain18220063
200 mm (7.87 in): Days with 200 mm or more rain2120081

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2000.

Download the Data

  • 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-17).