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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Byerwen Threshold Days by Year (ASN00033104)

4 fixed thresholds counted per year at Byerwen (ASN00033104): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Byerwen Thresholds

  • Byerwen: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 1917 with 33.
  • Byerwen: days with 25 mm (0.98 in) or more of precipitation in 26 years, most in 1917 with 13.
  • Byerwen: days with 50 mm (1.97 in) or more of precipitation in 24 years, most in 1930 with 6.
  • Byerwen: days with 100 mm (3.94 in) or more of precipitation in 4 years, most in 1918 with 2.
  • 4 fixed thresholds have at least one qualifying day at Byerwen.
26 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Byerwen Days per year at Byerwen with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 33 in 1917. 0102030401913: 211914: 101915: 101916: 221917: 331918: 271919: 111920: 191921: 221922: 231923: 91924: 201925: 211926: 81927: 151928: 231929: 201930: 201959: 211960: 181961: 151962: 131963: 211964: 191989: 231990: 17191319161919192219251928195919621989
Days per year at Byerwen with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 33 in 1917.
Days with 10 mm (0.39 in) or more of precipitation per year at Byerwen
YearDaysDecade average
19132119.1
19141019.1
19151019.1
19162219.1
19173319.1
19182719.1
19191119.1
19201918
19212218
19222318
1923918
19242018
19252118
1926818
19271518
19282318
19292018
19302020
19592121
19601817.2
19611517.2
19621317.2
19632117.2
19641917.2
19892323
19901717
First to last qualifying date each year at Byerwen For each year, a bar from the first to the last day at Byerwen meeting 10 mm (0.39 in). 1913: 5 January 1913 to 26 December 19131914: 19 January 1914 to 24 June 19141915: 4 January 1915 to 13 December 19151916: 4 February 1916 to 30 December 19161917: 2 January 1917 to 20 December 19171918: 3 January 1918 to 26 December 19181919: 2 January 1919 to 18 December 19191920: 20 January 1920 to 9 December 19201921: 2 January 1921 to 30 December 19211922: 9 January 1922 to 26 December 19221923: 3 January 1923 to 28 December 19231924: 2 February 1924 to 17 December 19241925: 1 January 1925 to 31 December 19251926: 1 January 1926 to 22 December 19261927: 18 January 1927 to 22 December 19271928: 16 January 1928 to 27 December 19281929: 17 January 1929 to 30 December 19291930: 1 January 1930 to 18 December 19301959: 2 January 1959 to 26 December 19591960: 17 January 1960 to 27 December 19601961: 3 January 1961 to 28 November 19611962: 7 January 1962 to 30 December 19621963: 1 January 1963 to 18 December 19631964: 2 January 1964 to 27 December 19641989: 2 February 1989 to 9 December 19891990: 17 January 1990 to 30 December 19901913191719211925192919611989JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Byerwen meeting 10 mm (0.39 in).
First to last qualifying date each year at Byerwen
YearFirst dateLast date
19131913-01-051913-12-26
19141914-01-191914-06-24
19151915-01-041915-12-13
19161916-02-041916-12-30
19171917-01-021917-12-20
19181918-01-031918-12-26
19191919-01-021919-12-18
19201920-01-201920-12-09
19211921-01-021921-12-30
19221922-01-091922-12-26
19231923-01-031923-12-28
19241924-02-021924-12-17
19251925-01-011925-12-31
19261926-01-011926-12-22
19271927-01-181927-12-22
19281928-01-161928-12-27
19291929-01-171929-12-30
19301930-01-011930-12-18
19591959-01-021959-12-26
19601960-01-171960-12-27
19611961-01-031961-11-28
19621962-01-071962-12-30
19631963-01-011963-12-18
19641964-01-021964-12-27
19891989-02-021989-12-09
19901990-01-171990-12-30

Every Fixed Threshold

Fixed thresholds at Byerwen
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2633191717
25 mm (0.98 in): Days with 25 mm or more rain261319178
50 mm (1.97 in): Days with 50 mm or more rain24619303
100 mm (3.94 in): Days with 100 mm or more rain4219181

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1913.

Download the Data

  • Data for Byerwen 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 (2025-12-31).