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Built 2026-10-19 (19 October 2026)

Princeton Threshold Days by Year (USC00196644)

7 fixed thresholds counted per year at Princeton (USC00196644): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Princeton Thresholds

  • Princeton: days with 10 mm (0.39 in) or more of precipitation in 36 years, most in 1945 with 47.
  • Princeton: days with 25 mm (0.98 in) or more of precipitation in 36 years, most in 1936 with 22.
  • Princeton: days with 50 mm (1.97 in) or more of precipitation in 34 years, most in 1936 with 7.
  • Princeton: days with 10 cm (3.9 in) or more of snowfall in 15 years, most in 1956 with 12.
  • 7 fixed thresholds have at least one qualifying day at Princeton.
36 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Princeton Days per year at Princeton with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 47 in 1945. 02040601896: 401897: 421898: 461912: 381914: 301915: 331916: 331917: 361918: 271919: 371920: 371921: 401922: 411923: 341927: 431928: 351930: 331931: 361932: 331933: 391935: 301936: 391937: 411938: 381939: 391940: 381941: 281942: 451943: 381944: 341945: 471946: 381947: 371948: 291949: 271957: 22189619141918192219301935193919431947
Days per year at Princeton with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 47 in 1945.
Days with 10 mm (0.39 in) or more of precipitation per year at Princeton
YearDaysDecade average
18964042.7
18974242.7
18984642.7
19123833.4
19143033.4
19153333.4
19163333.4
19173633.4
19182733.4
19193733.4
19203738.3
19214038.3
19224138.3
19233438.3
19274338.3
19283538.3
19303336.4
19313636.4
19323336.4
19333936.4
19353036.4
19363936.4
19374136.4
19383836.4
19393936.4
19403836.1
19412836.1
19424536.1
19433836.1
19443436.1
19454736.1
19463836.1
19473736.1
19482936.1
19492736.1
19572222
First to last qualifying date each year at Princeton For each year, a bar from the first to the last day at Princeton meeting 10 mm (0.39 in). 1896: 10 January 1896 to 16 December 18961897: 5 January 1897 to 31 December 18971898: 15 January 1898 to 31 December 18981912: 9 January 1912 to 30 December 19121914: 21 January 1914 to 21 December 19141915: 7 January 1915 to 29 December 19151916: 2 January 1916 to 22 December 19161917: 3 January 1917 to 14 December 19171918: 8 January 1918 to 25 December 19181919: 3 January 1919 to 10 December 19191920: 9 January 1920 to 27 December 19201921: 5 January 1921 to 25 December 19211922: 5 January 1922 to 29 December 19221923: 1 January 1923 to 28 December 19231927: 15 January 1927 to 31 December 19271928: 19 January 1928 to 28 December 19281930: 15 January 1930 to 27 December 19301931: 6 January 1931 to 25 December 19311932: 3 January 1932 to 28 December 19321933: 9 January 1933 to 27 December 19331935: 1 January 1935 to 29 November 19351936: 3 January 1936 to 31 December 19361937: 3 January 1937 to 31 December 19371938: 2 January 1938 to 27 December 19381939: 6 January 1939 to 20 December 19391940: 13 January 1940 to 30 December 19401941: 4 January 1941 to 24 December 19411942: 2 January 1942 to 31 December 19421943: 4 January 1943 to 27 December 19431944: 7 January 1944 to 28 December 19441945: 1 January 1945 to 29 December 19451946: 10 January 1946 to 30 December 19461947: 4 January 1947 to 27 December 19471948: 2 January 1948 to 11 November 19481949: 1 January 1949 to 3 December 19491957: 7 January 1957 to 21 December 195718961915192019281935194019451957JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Princeton meeting 10 mm (0.39 in).
First to last qualifying date each year at Princeton
YearFirst dateLast date
18961896-01-101896-12-16
18971897-01-051897-12-31
18981898-01-151898-12-31
19121912-01-091912-12-30
19141914-01-211914-12-21
19151915-01-071915-12-29
19161916-01-021916-12-22
19171917-01-031917-12-14
19181918-01-081918-12-25
19191919-01-031919-12-10
19201920-01-091920-12-27
19211921-01-051921-12-25
19221922-01-051922-12-29
19231923-01-011923-12-28
19271927-01-151927-12-31
19281928-01-191928-12-28
19301930-01-151930-12-27
19311931-01-061931-12-25
19321932-01-031932-12-28
19331933-01-091933-12-27
19351935-01-011935-11-29
19361936-01-031936-12-31
19371937-01-031937-12-31
19381938-01-021938-12-27
19391939-01-061939-12-20
19401940-01-131940-12-30
19411941-01-041941-12-24
19421942-01-021942-12-31
19431943-01-041943-12-27
19441944-01-071944-12-28
19451945-01-011945-12-29
19461946-01-101946-12-30
19471947-01-041947-12-27
19481948-01-021948-11-11
19491949-01-011949-12-03
19571957-01-071957-12-21

Every Fixed Threshold

Fixed thresholds at Princeton
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3647194522
25 mm (0.98 in): Days with 25 mm or more rain362219365
50 mm (1.97 in): Days with 50 mm or more rain34719361
100 mm (3.94 in): Days with 100 mm or more rain10319381
200 mm (7.87 in): Days with 200 mm or more rain2119331
10 cm (3.9 in): Days with 10 cm or more snowfall151219567
25 cm (9.8 in): Days with 25 cm or more snowfall8319331

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

  • Data for Princeton 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).