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Built 2026-10-19 (19 October 2026)

Harrisburg River Gage Threshold Days by Year (USC00363706)

6 fixed thresholds counted per year at Harrisburg River Gage (USC00363706): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Harrisburg River Gage Thresholds

  • Harrisburg River Gage: days with 10 mm (0.39 in) or more of precipitation in 42 years, most in 1929 with 42.
  • Harrisburg River Gage: days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 1940 with 15.
  • Harrisburg River Gage: days with 50 mm (1.97 in) or more of precipitation in 23 years, most in 1924 with 4.
  • Harrisburg River Gage: days with 10 cm (3.9 in) or more of snowfall in 5 years, most in 1935 with 4.
  • 6 fixed thresholds have at least one qualifying day at Harrisburg River Gage.
42 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Harrisburg River Gage Days per year at Harrisburg River Gage with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 42 in 1929. 02040601898: 381899: 291900: 231901: 251902: 371903: 341904: 281905: 271906: 241907: 301908: 331909: 221910: 271911: 331912: 341913: 301914: 301915: 341916: 301917: 311918: 301919: 381920: 361921: 221922: 231923: 231924: 391925: 381926: 371927: 291928: 371929: 421930: 201931: 261932: 371933: 401934: 391935: 261936: 351938: 321940: 371941: 22189819031908191319181923192819331940
Days per year at Harrisburg River Gage with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 42 in 1929.
Days with 10 mm (0.39 in) or more of precipitation per year at Harrisburg River Gage
YearDaysDecade average
18983833.5
18992933.5
19002328.3
19012528.3
19023728.3
19033428.3
19042828.3
19052728.3
19062428.3
19073028.3
19083328.3
19092228.3
19102731.7
19113331.7
19123431.7
19133031.7
19143031.7
19153431.7
19163031.7
19173131.7
19183031.7
19193831.7
19203632.6
19212232.6
19222332.6
19232332.6
19243932.6
19253832.6
19263732.6
19272932.6
19283732.6
19294232.6
19302031.9
19312631.9
19323731.9
19334031.9
19343931.9
19352631.9
19363531.9
19383231.9
19403729.5
19412229.5
First to last qualifying date each year at Harrisburg River Gage For each year, a bar from the first to the last day at Harrisburg River Gage meeting 10 mm (0.39 in). 1898: 15 January 1898 to 23 December 18981899: 1 January 1899 to 24 December 18991900: 12 January 1900 to 5 December 19001901: 12 January 1901 to 30 December 19011902: 22 January 1902 to 22 December 19021903: 3 January 1903 to 21 December 19031904: 14 January 1904 to 27 December 19041905: 4 January 1905 to 29 December 19051906: 4 January 1906 to 31 December 19061907: 19 January 1907 to 23 December 19071908: 8 January 1908 to 7 December 19081909: 17 January 1909 to 26 December 19091910: 7 January 1910 to 24 December 19101911: 3 January 1911 to 27 December 19111912: 9 January 1912 to 31 December 19121913: 4 January 1913 to 26 December 19131914: 4 January 1914 to 21 December 19141915: 7 January 1915 to 30 December 19151916: 2 February 1916 to 28 December 19161917: 14 January 1917 to 14 December 19171918: 12 January 1918 to 23 December 19181919: 1 January 1919 to 14 December 19191920: 9 January 1920 to 23 December 19201921: 14 January 1921 to 24 December 19211922: 12 January 1922 to 28 December 19221923: 1 January 1923 to 28 December 19231924: 3 January 1924 to 6 December 19241925: 2 January 1925 to 6 December 19251926: 9 January 1926 to 26 December 19261927: 21 January 1927 to 8 December 19271928: 19 January 1928 to 15 December 19281929: 2 January 1929 to 24 December 19291930: 18 January 1930 to 27 December 19301931: 6 January 1931 to 23 December 19311932: 2 January 1932 to 28 December 19321933: 10 January 1933 to 17 October 19331934: 5 January 1934 to 20 December 19341935: 1 January 1935 to 14 December 19351936: 3 January 1936 to 20 December 19361938: 25 January 1938 to 27 December 19381940: 14 January 1940 to 29 December 19401941: 17 January 1941 to 24 December 19411898190419101916192219281934JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Harrisburg River Gage meeting 10 mm (0.39 in).
First to last qualifying date each year at Harrisburg River Gage
YearFirst dateLast date
18981898-01-151898-12-23
18991899-01-011899-12-24
19001900-01-121900-12-05
19011901-01-121901-12-30
19021902-01-221902-12-22
19031903-01-031903-12-21
19041904-01-141904-12-27
19051905-01-041905-12-29
19061906-01-041906-12-31
19071907-01-191907-12-23
19081908-01-081908-12-07
19091909-01-171909-12-26
19101910-01-071910-12-24
19111911-01-031911-12-27
19121912-01-091912-12-31
19131913-01-041913-12-26
19141914-01-041914-12-21
19151915-01-071915-12-30
19161916-02-021916-12-28
19171917-01-141917-12-14
19181918-01-121918-12-23
19191919-01-011919-12-14
19201920-01-091920-12-23
19211921-01-141921-12-24
19221922-01-121922-12-28
19231923-01-011923-12-28
19241924-01-031924-12-06
19251925-01-021925-12-06
19261926-01-091926-12-26
19271927-01-211927-12-08
19281928-01-191928-12-15
19291929-01-021929-12-24
19301930-01-181930-12-27
19311931-01-061931-12-23
19321932-01-021932-12-28
19331933-01-101933-10-17
19341934-01-051934-12-20
19351935-01-011935-12-14
19361936-01-031936-12-20
19381938-01-251938-12-27
19401940-01-141940-12-29
19411941-01-171941-12-24

Every Fixed Threshold

Fixed thresholds at Harrisburg River Gage
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4242192922
25 mm (0.98 in): Days with 25 mm or more rain421519403
50 mm (1.97 in): Days with 50 mm or more rain23419241
100 mm (3.94 in): Days with 100 mm or more rain4119071
10 cm (3.9 in): Days with 10 cm or more snowfall5419351
25 cm (9.8 in): Days with 25 cm or more snowfall1119301

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1898.

Download the Data

  • Data for Harrisburg River Gage 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).