Princeton Threshold Days by Year (CA001126505)

16 fixed thresholds counted per year at Princeton (CA001126505): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Princeton Thresholds

Princeton: nights with a minimum temperature at or below 0 C (32 F) in 44 years, most in 1913 with 229.
Princeton: nights with a minimum temperature at or below -10 C (14 F) in 44 years, most in 1916 with 85.
Princeton: nights with a minimum temperature at or below -20 C (-4 F) in 44 years, most in 1916 with 36.
Princeton: days with a maximum temperature at or above 30 C (86 F) in 43 years, most in 1904 with 40.
16 fixed thresholds have at least one qualifying day at Princeton.

Days at or above 30 C (86 F)

43 years with a qualifying day

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 40 in 1904.

Days at or above 30 C (86 F) per year at Princeton
Year	Days	Decade average
1895	23	25
1897	27	25
1901	23	22.4
1902	9	22.4
1903	12	22.4
1904	40	22.4
1905	19	22.4
1906	39	22.4
1907	20	22.4
1908	25	22.4
1909	15	22.4
1910	12	19.8
1911	13	19.8
1912	18	19.8
1913	18	19.8
1914	29	19.8
1915	22	19.8
1916	19	19.8
1917	30	19.8
1918	17	19.8
1919	20	19.8
1920	33	22.7
1921	10	22.7
1922	25	22.7
1923	21	22.7
1924	23	22.7
1925	21	22.7
1926	25	22.7
1927	22	22.7
1928	24	22.7
1929	23	22.7
1930	24	23.8
1931	27	23.8
1932	22	23.8
1933	25	23.8
1934	26	23.8
1935	13	23.8
1936	29	23.8
1937	14	23.8
1938	26	23.8
1939	32	23.8
1940	34	31.5
1941	29	31.5

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
Year	First date	Last date
1895	1895-05-21	1895-08-29
1897	1897-05-13	1897-10-10
1901	1901-05-24	1901-08-30
1902	1902-06-22	1902-08-10
1903	1903-05-30	1903-08-18
1904	1904-06-28	1904-09-07
1905	1905-07-08	1905-08-11
1906	1906-06-24	1906-08-30
1907	1907-05-30	1907-09-09
1908	1908-06-24	1908-08-19
1909	1909-06-10	1909-09-06
1910	1910-04-25	1910-08-19
1911	1911-07-13	1911-08-18
1912	1912-06-07	1912-08-22
1913	1913-07-18	1913-08-28
1914	1914-05-31	1914-08-20
1915	1915-07-01	1915-08-29
1916	1916-06-14	1916-08-31
1917	1917-06-15	1917-09-16
1918	1918-06-09	1918-08-31
1919	1919-05-21	1919-08-30
1920	1920-06-29	1920-09-03
1921	1921-07-18	1921-08-13
1922	1922-05-31	1922-09-11
1923	1923-06-28	1923-10-02
1924	1924-05-11	1924-09-07
1925	1925-06-20	1925-08-20
1926	1926-04-28	1926-08-25
1927	1927-06-06	1927-08-16
1928	1928-05-20	1928-09-04
1929	1929-07-01	1929-09-12
1930	1930-07-09	1930-09-05
1931	1931-05-30	1931-08-28
1932	1932-06-09	1932-09-10
1933	1933-06-12	1933-08-27
1934	1934-04-20	1934-09-05
1935	1935-07-12	1935-09-09
1936	1936-05-25	1936-08-28
1937	1937-06-01	1937-09-15
1938	1938-05-22	1938-09-29
1939	1939-05-13	1939-09-21
1940	1940-05-22	1940-09-12
1941	1941-05-23	1941-08-22

Every Fixed Threshold

Fixed thresholds at Princeton
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	43	40	1904	29
35 C (95 F): Days	35	9	1897	4
90 F (32.2 C): Days	43	23	1897	14
100 F (37.8 C): Days	6	2	1941	2
0 C (32 F): Ice days (max	43	82	1916	28
0 C (32 F): Frost days (min	44	229	1913	183
-10 C (14 F): Days with min	44	85	1916	25
-20 C (-4 F): Days with min	44	36	1916	1
-30 C (-22 F): Days with min	28	15	1916	7
-40 C (-40 F): Days with min	5	4	1909	1
20 C (68 F): Tropical nights (min	2	3	1895	2
10 mm (0.39 in): Days with 10 mm or more rain	40	12	1933	8
25 mm (0.98 in): Days with 25 mm or more rain	12	3	1937	1
10 cm (3.9 in): Days with 10 cm or more snowfall	36	8	1933	2
25 cm (9.8 in): Days with 25 cm or more snowfall	7	2	1935	2
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1935	1

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 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Princeton Threshold Days by Year (CA001126505)

Key Facts for Princeton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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