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

Princeton Threshold Days by Year

12 fixed thresholds counted per year at Princeton (USC00467207): 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 94 years, most in 1909 with 59.
  • Princeton: days with 25 mm (0.98 in) or more of precipitation in 94 years, most in 1908 with 29.
  • Princeton: days with 10 cm (3.9 in) or more of snowfall in 57 years, most in 1912 with 6.
  • Princeton: days with 50 mm (1.97 in) or more of precipitation in 49 years, most in 1907 with 6.
  • 12 fixed thresholds have at least one qualifying day at Princeton.
5 years with a qualifying day
Days at or above 30 C (86 F) per year at Princeton Days per year at Princeton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 10 in 1903. 0358101903: 101904: 71907: 11908: 11911: 219031904190719081911
Days per year at Princeton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 10 in 1903.
Days at or above 30 C (86 F) per year at Princeton
YearDaysDecade average
1903104.8
190474.8
190714.8
190814.8
191122
First to last qualifying date each year at Princeton For each year, a bar from the first to the last day at Princeton meeting 30 C (86 F). 1903: 1 July 1903 to 28 August 19031904: 13 May 1904 to 19 July 19041907: 28 June 1907 to 28 June 19071908: 8 June 1908 to 8 June 19081911: 11 June 1911 to 17 August 191119031904190719081911JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Princeton meeting 30 C (86 F).
First to last qualifying date each year at Princeton
YearFirst dateLast date
19031903-07-011903-08-28
19041904-05-131904-07-19
19071907-06-281907-06-28
19081908-06-081908-06-08
19111911-06-111911-08-17

Every Fixed Threshold

Fixed thresholds at Princeton
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days51019032
0 C (32 F): Ice days (max933191211
0 C (32 F): Frost days (min101441912111
-10 C (14 F): Days with min1033191213
-20 C (-4 F): Days with min3119081
20 C (68 F): Tropical nights (min3119031
10 mm (0.39 in): Days with 10 mm or more rain9459190939
25 mm (0.98 in): Days with 25 mm or more rain942919085
50 mm (1.97 in): Days with 50 mm or more rain49619071
100 mm (3.94 in): Days with 100 mm or more rain5119131
10 cm (3.9 in): Days with 10 cm or more snowfall57619122
25 cm (9.8 in): Days with 25 cm or more snowfall13219741

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1903.

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).