Built 2026-10-18 (18 October 2026)

The Overflow Threshold Days by Year

3 fixed thresholds counted per year at The Overflow (ASN00050073): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for The Overflow Thresholds

  • The Overflow: days with 10 mm (0.39 in) or more of precipitation in 29 years, most in 1916 with 23.
  • The Overflow: days with 25 mm (0.98 in) or more of precipitation in 27 years, most in 1916 with 7.
  • The Overflow: days with 50 mm (1.97 in) or more of precipitation in 12 years, most in 1896 with 2.
  • 3 fixed thresholds have at least one qualifying day at The Overflow.
29 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at The Overflow Days per year at The Overflow with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 23 in 1916. 01020301895: 111896: 151897: 121898: 131901: 91902: 91903: 101904: 121905: 141906: 181907: 121908: 141909: 121910: 141911: 211912: 91913: 171914: 101915: 71916: 231917: 171918: 121919: 101921: 181922: 81928: 121929: 81930: 141931: 161895189819031906190919121915191819221930
Days per year at The Overflow with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 23 in 1916.
Days with 10 mm (0.39 in) or more of precipitation per year at The Overflow
YearDaysDecade average
18951112.8
18961512.8
18971212.8
18981312.8
1901912.2
1902912.2
19031012.2
19041212.2
19051412.2
19061812.2
19071212.2
19081412.2
19091212.2
19101414
19112114
1912914
19131714
19141014
1915714
19162314
19171714
19181214
19191014
19211811.5
1922811.5
19281211.5
1929811.5
19301415
19311615
First to last qualifying date each year at The Overflow For each year, a bar from the first to the last day at The Overflow meeting 10 mm (0.39 in). 1895: 22 January 1895 to 4 November 18951896: 10 February 1896 to 6 December 18961897: 9 January 1897 to 19 December 18971898: 13 January 1898 to 27 October 18981901: 27 January 1901 to 27 October 19011902: 8 June 1902 to 17 December 19021903: 23 April 1903 to 11 December 19031904: 1 January 1904 to 16 December 19041905: 26 March 1905 to 31 December 19051906: 20 February 1906 to 18 December 19061907: 27 January 1907 to 28 December 19071908: 24 January 1908 to 12 December 19081909: 31 January 1909 to 25 December 19091910: 11 January 1910 to 18 December 19101911: 13 January 1911 to 15 December 19111912: 10 June 1912 to 23 December 19121913: 4 January 1913 to 24 December 19131914: 12 January 1914 to 22 December 19141915: 19 February 1915 to 14 October 19151916: 28 January 1916 to 12 December 19161917: 17 January 1917 to 23 November 19171918: 11 January 1918 to 2 December 19181919: 19 February 1919 to 5 December 19191921: 3 January 1921 to 31 December 19211922: 13 January 1922 to 6 December 19221928: 18 January 1928 to 11 October 19281929: 8 January 1929 to 28 December 19291930: 14 February 1930 to 17 December 19301931: 3 March 1931 to 3 December 193118951901190519091913191719221931JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at The Overflow meeting 10 mm (0.39 in).
First to last qualifying date each year at The Overflow
YearFirst dateLast date
18951895-01-221895-11-04
18961896-02-101896-12-06
18971897-01-091897-12-19
18981898-01-131898-10-27
19011901-01-271901-10-27
19021902-06-081902-12-17
19031903-04-231903-12-11
19041904-01-011904-12-16
19051905-03-261905-12-31
19061906-02-201906-12-18
19071907-01-271907-12-28
19081908-01-241908-12-12
19091909-01-311909-12-25
19101910-01-111910-12-18
19111911-01-131911-12-15
19121912-06-101912-12-23
19131913-01-041913-12-24
19141914-01-121914-12-22
19151915-02-191915-10-14
19161916-01-281916-12-12
19171917-01-171917-11-23
19181918-01-111918-12-02
19191919-02-191919-12-05
19211921-01-031921-12-31
19221922-01-131922-12-06
19281928-01-181928-10-11
19291929-01-081929-12-28
19301930-02-141930-12-17
19311931-03-031931-12-03

Every Fixed Threshold

Fixed thresholds at The Overflow
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2923191616
25 mm (0.98 in): Days with 25 mm or more rain27719166
50 mm (1.97 in): Days with 50 mm or more rain12218962

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1895.

Download the Data

  • Data for The Overflow 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).