Princeton Wtr Wks Weather Records (USC00287328)

Record envelope, standing records and threshold days for Princeton Wtr Wks (USC00287328), New Jersey, United States, with 46 years of record.

Key Facts for Princeton Wtr Wks

Princeton Wtr Wks (USC00287328) is a weather station in New Jersey, United States at 40.33 latitude and -74.67 longitude, 18 m (59 ft) above sea level.
The station reports from 1941 to 1986, 46 years of record.
122 records set at Princeton Wtr Wks still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Princeton Wtr Wks set a daily record precipitation of 48.8 mm (1.9 in) on 20 November 1986.

About the Station

Location: New Jersey, United States, 40.33 latitude, -74.67 longitude.
Elevation: 18 m (59 ft).
Period of record: 1941 to 1986, 46 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Princeton Wtr Wks. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Princeton Wtr Wks, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	-0.6 C (30.9 F)	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	16.7 C (62.1 F)	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

122 standing records

122 records at Princeton Wtr Wks still stand. 1970 holds the most, with 62.

Wettest Day of Each Month

Aug: 173.2 mm (6.8 in)

The wettest day on record for each calendar month at Princeton Wtr Wks. The most was 173.2 mm (6.8 in) on 27 August 1971.

Record daily precipitation for each month at Princeton Wtr Wks
Month	Record daily precipitation (mm)	Date
Jan	70.6 mm (2.8 in)	21 January 1979
Feb	108.0 mm (4.3 in)	19 February 1982
Mar	57.2 mm (2.3 in)	29 March 1984
Apr	55.9 mm (2.2 in)	6 April 1958
May	81.3 mm (3.2 in)	30 May 1984
Jun	99.1 mm (3.9 in)	12 June 1968
Jul	167.6 mm (6.6 in)	20 July 1975
Aug	173.2 mm (6.8 in)	27 August 1971
Sep	112.8 mm (4.4 in)	21 September 1966
Oct	111.8 mm (4.4 in)	14 October 1955
Nov	89.4 mm (3.5 in)	8 November 1972
Dec	80.5 mm (3.2 in)	31 December 1948

Latest Records

Latest records at Princeton Wtr Wks
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 November 1986	Princeton Wtr Wks, US	daily rain	48.8 mm (1.9 in)	16.5 mm (0.6 in)	33 years	25 of 100 (Routine)
24 August 1986	Princeton Wtr Wks, US	daily rain	23.6 mm (0.9 in)	5.3 mm (0.21 in)	11 years	9 of 100 (Routine)
27 July 1986	Princeton Wtr Wks, US	daily rain	53.3 mm (2.1 in)	23.8 mm (0.9 in)	44 years	27 of 100 (Routine)
23 April 1986	Princeton Wtr Wks, US	daily rain	24.1 mm (0.9 in)	10.6 mm (0.4 in)	35 years	20 of 100 (Routine)
17 April 1986	Princeton Wtr Wks, US	daily rain	50.8 mm (2.0 in)	16.0 mm (0.6 in)	32 years	28 of 100 (Routine)
16 April 1986	Princeton Wtr Wks, US	daily rain	33.8 mm (1.3 in)	13.5 mm (0.5 in)	24 years	23 of 100 (Routine)
23 February 1986	Princeton Wtr Wks, US	daily snowfall	2.5 cm (1.0 in)	2.5 cm (1.0 in)	44 years	19 of 100 (Routine)
17 February 1986	Princeton Wtr Wks, US	daily snowfall	1.3 cm (0.5 in)	1.3 cm (0.5 in)	44 years	18 of 100 (Routine)
15 February 1986	Princeton Wtr Wks, US	daily snowfall	2.5 cm (1.0 in)	2.5 cm (1.0 in)	44 years	19 of 100 (Routine)
11 February 1986	Princeton Wtr Wks, US	daily snowfall	2.5 cm (1.0 in)	1.2 cm (0.5 in)	38 years	16 of 100 (Routine)
5 February 1986	Princeton Wtr Wks, US	daily rain	15.2 mm (0.6 in)	9.4 mm (0.37 in)	44 years	20 of 100 (Routine)
5 February 1986	Princeton Wtr Wks, US	daily snowfall	5.1 cm (2.0 in)	2.8 cm (1.1 in)	8 years	9 of 100 (Routine)
26 January 1986	Princeton Wtr Wks, US	daily rain	50.8 mm (2.0 in)	6.3 mm (0.25 in)	8 years	11 of 100 (Routine)
5 January 1986	Princeton Wtr Wks, US	daily rain (Tie)	6.9 mm (0.27 in)	tie	31 years	3 of 100 (Routine)
17 November 1985	Princeton Wtr Wks, US	daily rain	50.8 mm (2.0 in)	33.0 mm (1.3 in)	4 years	28 of 100 (Routine)
5 November 1985	Princeton Wtr Wks, US	daily rain	41.9 mm (1.6 in)	28.4 mm (1.1 in)	16 years	28 of 100 (Routine)
4 October 1985	Princeton Wtr Wks, US	daily rain	10.2 mm (0.4 in)	0.3 mm (0.01 in)	4 years	5 of 100 (Routine)
3 October 1985	Princeton Wtr Wks, US	daily rain	18.5 mm (0.7 in)	9.1 mm (0.36 in)	24 years	16 of 100 (Routine)
28 September 1985	Princeton Wtr Wks, US	daily rain	59.7 mm (2.4 in)	30.5 mm (1.2 in)	11 years	24 of 100 (Routine)
10 September 1985	Princeton Wtr Wks, US	daily rain	32.3 mm (1.3 in)	3.1 mm (0.12 in)	36 years	16 of 100 (Routine)

Extremes by Year

1941 to 1986

Yearly extremes at Princeton Wtr Wks: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Coldest night (TNn)	-0.6 C (30.9 F)	1971	8.0 C (46.5 F)	2
Wettest day (Rx1day)	173.2 mm (6.8 in)	1971	74.6 mm (2.9 in)	46
Wettest five days (Rx5day)	257.8 mm (10.1 in)	1971	104.3 mm (4.1 in)	46
Longest dry spell (CDD)	38 days	1952	19 days	46

Coldest night (TNn)

The coldest night of the year at Princeton Wtr Wks, 1941 to 1986. The record is -0.6 C (30.9 F) in 1971, marked on the chart; the median year is 8.0 C (46.5 F).

Coldest night (TNn) at Princeton Wtr Wks by year
Year	Coldest night (TNn)
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	16.7 C (62.1 F)
1971	-0.6 C (30.9 F)
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a

Wettest day (Rx1day)

The wettest day of the year at Princeton Wtr Wks, 1941 to 1986. The record is 173.2 mm (6.8 in) in 1971, marked on the chart; the median year is 74.6 mm (2.9 in).

Wettest day (Rx1day) at Princeton Wtr Wks by year
Year	Wettest day (Rx1day)
1941	71.4 mm (2.8 in)
1942	63.8 mm (2.5 in)
1943	51.8 mm (2.0 in)
1944	90.9 mm (3.6 in)
1945	74.9 mm (2.9 in)
1946	121.9 mm (4.8 in)
1947	77.5 mm (3.1 in)
1948	80.5 mm (3.2 in)
1949	34.3 mm (1.4 in)
1950	110.0 mm (4.3 in)
1951	87.1 mm (3.4 in)
1952	73.4 mm (2.9 in)
1953	52.6 mm (2.1 in)
1954	91.4 mm (3.6 in)
1955	111.8 mm (4.4 in)
1956	40.1 mm (1.6 in)
1957	45.5 mm (1.8 in)
1958	87.6 mm (3.4 in)
1959	48.3 mm (1.9 in)
1960	107.2 mm (4.2 in)
1961	98.0 mm (3.9 in)
1962	79.2 mm (3.1 in)
1963	80.0 mm (3.1 in)
1964	85.1 mm (3.4 in)
1965	52.6 mm (2.1 in)
1966	112.8 mm (4.4 in)
1967	73.2 mm (2.9 in)
1968	99.1 mm (3.9 in)
1969	74.2 mm (2.9 in)
1970	67.6 mm (2.7 in)
1971	173.2 mm (6.8 in)
1972	89.4 mm (3.5 in)
1973	109.2 mm (4.3 in)
1974	53.3 mm (2.1 in)
1975	167.6 mm (6.6 in)
1976	68.3 mm (2.7 in)
1977	71.1 mm (2.8 in)
1978	63.5 mm (2.5 in)
1979	70.6 mm (2.8 in)
1980	54.1 mm (2.1 in)
1981	73.7 mm (2.9 in)
1982	108.0 mm (4.3 in)
1983	50.8 mm (2.0 in)
1984	81.3 mm (3.2 in)
1985	59.7 mm (2.4 in)
1986	53.3 mm (2.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Princeton Wtr Wks, 1941 to 1986. The record is 257.8 mm (10.1 in) in 1971, marked on the chart; the median year is 104.3 mm (4.1 in).

Wettest five days (Rx5day) at Princeton Wtr Wks by year
Year	Wettest five days (Rx5day)
1941	124.0 mm (4.9 in)
1942	93.2 mm (3.7 in)
1943	99.8 mm (3.9 in)
1944	236.1 mm (9.3 in)
1945	100.1 mm (3.9 in)
1946	150.9 mm (5.9 in)
1947	151.4 mm (6.0 in)
1948	80.5 mm (3.2 in)
1949	49.3 mm (1.9 in)
1950	140.4 mm (5.5 in)
1951	144.0 mm (5.7 in)
1952	99.5 mm (3.9 in)
1953	91.0 mm (3.6 in)
1954	105.3 mm (4.1 in)
1955	173.5 mm (6.8 in)
1956	68.3 mm (2.7 in)
1957	71.4 mm (2.8 in)
1958	100.6 mm (4.0 in)
1959	79.0 mm (3.1 in)
1960	133.9 mm (5.3 in)
1961	121.2 mm (4.8 in)
1962	85.3 mm (3.4 in)
1963	104.6 mm (4.1 in)
1964	106.2 mm (4.2 in)
1965	55.0 mm (2.2 in)
1966	143.1 mm (5.6 in)
1967	96.8 mm (3.8 in)
1968	103.9 mm (4.1 in)
1969	116.4 mm (4.6 in)
1970	105.7 mm (4.2 in)
1971	257.8 mm (10.1 in)
1972	101.6 mm (4.0 in)
1973	114.8 mm (4.5 in)
1974	94.0 mm (3.7 in)
1975	239.5 mm (9.4 in)
1976	80.5 mm (3.2 in)
1977	89.6 mm (3.5 in)
1978	89.4 mm (3.5 in)
1979	140.0 mm (5.5 in)
1980	87.6 mm (3.4 in)
1981	91.5 mm (3.6 in)
1982	113.6 mm (4.5 in)
1983	85.6 mm (3.4 in)
1984	145.0 mm (5.7 in)
1985	115.3 mm (4.5 in)
1986	110.0 mm (4.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Princeton Wtr Wks, 1941 to 1986. The record is 38 days in 1952, marked on the chart; the median year is 19 days.

Longest dry spell (CDD) at Princeton Wtr Wks by year
Year	Longest dry spell (CDD)
1941	32 days
1942	26 days
1943	18 days
1944	19 days
1945	16 days
1946	24 days
1947	36 days
1948	24 days
1949	24 days
1950	15 days
1951	12 days
1952	38 days
1953	18 days
1954	13 days
1955	29 days
1956	13 days
1957	15 days
1958	16 days
1959	19 days
1960	16 days
1961	17 days
1962	21 days
1963	28 days
1964	19 days
1965	21 days
1966	19 days
1967	19 days
1968	26 days
1969	16 days
1970	19 days
1971	20 days
1972	24 days
1973	26 days
1974	17 days
1975	17 days
1976	27 days
1977	18 days
1978	19 days
1979	11 days
1980	19 days
1981	17 days
1982	17 days
1983	17 days
1984	13 days
1985	21 days
1986	16 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

42 years, 1942 to 1986

A day with at least 76.2 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 179.5 mm (7.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Princeton Wtr Wks: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	76.2 mm (3.0 in)
5 years	102.0 mm (4.0 in)
10 years	119.7 mm (4.7 in)
25 years	143.1 mm (5.6 in)
50 years	161.1 mm (6.3 in)	Longer than the 42 years of record
100 years	179.5 mm (7.1 in)	Longer than the 42 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 42 years of values from 1942 to 1986.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 173.2 mm (6.8 in) in 1971; 167.6 mm (6.6 in) in 1975; 121.9 mm (4.8 in) in 1946.

Download the Data

Data for Princeton Wtr Wks standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Princeton Wtr Wks 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).