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Built 2026-10-16 (16 October 2026)

Blackwells Mills Weather Records (USC00280847)

Record envelope, standing records and threshold days for Blackwells Mills (USC00280847), New Jersey, United States, with 70 years of record.

Key Facts for Blackwells Mills

  • Blackwells Mills (USC00280847) is a weather station in New Jersey, United States at 40.46 latitude and -74.58 longitude, 24 m (79 ft) above sea level.
  • The station reports from 1956 to 2025, 70 years of record.
  • 0 records set at Blackwells Mills still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Blackwells Mills set a daily record precipitation of 41.7 mm (1.6 in) on 7 August 2024.

About the Station

  • Location: New Jersey, United States, 40.46 latitude, -74.58 longitude.
  • Elevation: 24 m (79 ft).
  • Period of record: 1956 to 2025, 70 years.
  • Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Blackwells Mills, with 2026 drawn through them The band shows the record high and record low for each calendar day at Blackwells Mills. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Blackwells Mills. 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 Blackwells Mills, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

0 standing records
Standing records at Blackwells Mills by the year they were set 0 records at Blackwells Mills still stand. 00000000000
0 records at Blackwells Mills still stand.
Standing records at Blackwells Mills by the year they were set
Year setStanding records

Wettest Day of Each Month

Jul: 205.7 mm (8.1 in)
Record daily precipitation for each month at Blackwells Mills The wettest day on record for each calendar month at Blackwells Mills. The most was 205.7 mm (8.1 in) on 14 July 1975. 0100200300 Jan: 92.7 mm (3.6 in), 26 January 1978 Jan Feb: 68.6 mm (2.7 in), 25 February 2016 Feb Mar: 67.8 mm (2.7 in), 24 March 2024 Mar Apr: 74.9 mm (2.9 in), 2 April 1998 Apr May: 92.7 mm (3.6 in), 30 May 1984 May Jun: 95.8 mm (3.8 in), 8 June 2013 Jun Jul: 205.7 mm (8.1 in), 14 July 1975 Jul Aug: 166.9 mm (6.6 in), 28 August 1971 Aug Sep: 101.9 mm (4.0 in), 22 September 1966 Sep Oct: 114.6 mm (4.5 in), 20 October 1996 Oct Nov: 82.8 mm (3.3 in), 7 November 1963 Nov Dec: 76.2 mm (3.0 in), 17 December 2012 Dec
The wettest day on record for each calendar month at Blackwells Mills. The most was 205.7 mm (8.1 in) on 14 July 1975.
Record daily precipitation for each month at Blackwells Mills
MonthRecord daily precipitation (mm)Date
Jan92.7 mm (3.6 in)26 January 1978
Feb68.6 mm (2.7 in)25 February 2016
Mar67.8 mm (2.7 in)24 March 2024
Apr74.9 mm (2.9 in)2 April 1998
May92.7 mm (3.6 in)30 May 1984
Jun95.8 mm (3.8 in)8 June 2013
Jul205.7 mm (8.1 in)14 July 1975
Aug166.9 mm (6.6 in)28 August 1971
Sep101.9 mm (4.0 in)22 September 1966
Oct114.6 mm (4.5 in)20 October 1996
Nov82.8 mm (3.3 in)7 November 1963
Dec76.2 mm (3.0 in)17 December 2012

Latest Records

20
Latest records at Blackwells Mills
DateStationRecordValueBeat old record byOld record stoodSignificance
7 August 2024Blackwells Mills, USdaily rain41.7 mm (1.6 in)17.6 mm (0.7 in)62 years34 of 100 (Routine)
1 July 2024Blackwells Mills, USdaily rain34.3 mm (1.4 in)6.4 mm (0.25 in)28 years16 of 100 (Routine)
24 March 2024Blackwells Mills, USmonthly rain67.8 mm (2.7 in)4.3 mm (0.17 in)9 years21 of 100 (Routine)
10 March 2024Blackwells Mills, USdaily rain43.2 mm (1.7 in)29.5 mm (1.2 in)27 years40 of 100 (Notable)
3 March 2024Blackwells Mills, USdaily rain43.2 mm (1.7 in)8.4 mm (0.33 in)6 years14 of 100 (Routine)
17 February 2024Blackwells Mills, USdaily snowfall20.3 cm (8.0 in)10.1 cm (4.0 in)8 years19 of 100 (Routine)
20 January 2024Blackwells Mills, USdaily snowfall5.1 cm (2.0 in)3.8 cm (1.5 in)41 years23 of 100 (Routine)
10 January 2024Blackwells Mills, USdaily rain62.5 mm (2.5 in)33.0 mm (1.3 in)60 years50 of 100 (Notable)
28 December 2023Blackwells Mills, USdaily rain49.3 mm (1.9 in)29.5 mm (1.2 in)58 years47 of 100 (Notable)
18 December 2023Blackwells Mills, USdaily rain63.5 mm (2.5 in)29.2 mm (1.1 in)49 years43 of 100 (Notable)
11 December 2023Blackwells Mills, USdaily rain40.6 mm (1.6 in)4.5 mm (0.18 in)53 years25 of 100 (Routine)
22 November 2023Blackwells Mills, USdaily rain44.5 mm (1.8 in)6.1 mm (0.24 in)12 years13 of 100 (Routine)
11 September 2023Blackwells Mills, USdaily rain30.7 mm (1.2 in)0.2 mm (0.01 in)2 years6 of 100 (Routine)
17 July 2023Blackwells Mills, USdaily rain33.0 mm (1.3 in)6.3 mm (0.25 in)34 years18 of 100 (Routine)
10 July 2023Blackwells Mills, USdaily rain17.8 mm (0.7 in)1.5 mm (0.06 in)36 years17 of 100 (Routine)
16 April 2023Blackwells Mills, USdaily rain55.9 mm (2.2 in)24.7 mm (1.0 in)26 years35 of 100 (Notable)
4 March 2023Blackwells Mills, USdaily rain33.0 mm (1.3 in)5.1 mm (0.20 in)4 years11 of 100 (Routine)
28 February 2023Blackwells Mills, USdaily snowfall2.5 cm (1.0 in)2.5 cm (1.0 in)55 years20 of 100 (Routine)
5 October 2022Blackwells Mills, USdaily rain27.9 mm (1.1 in)11.4 mm (0.4 in)36 years24 of 100 (Routine)
4 October 2022Blackwells Mills, USdaily rain42.7 mm (1.7 in)19.8 mm (0.8 in)36 years29 of 100 (Routine)

Extremes by Year

1956 to 2025
Yearly extremes at Blackwells Mills: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)205.7 mm (8.1 in)197567.8 mm (2.7 in)53
Wettest five days (Rx5day)351.3 mm (13.8 in)1975105.5 mm (4.2 in)53
Longest dry spell (CDD)41 days202418 days53

Wettest day (Rx1day)

Wettest day (Rx1day) at Blackwells Mills by year The wettest day of the year at Blackwells Mills, 1956 to 2025. The record is 205.7 mm (8.1 in) in 1975, marked on the chart; the median year is 67.8 mm (2.7 in). 0501001502002501960198020002020Record: 205.7 mm (8.1 in) in 1975
The wettest day of the year at Blackwells Mills, 1956 to 2025. The record is 205.7 mm (8.1 in) in 1975, marked on the chart; the median year is 67.8 mm (2.7 in).
Wettest day (Rx1day) at Blackwells Mills by year
YearWettest day (Rx1day)
195632.5 mm (1.3 in)
195754.4 mm (2.1 in)
195858.7 mm (2.3 in)
1959101.1 mm (4.0 in)
196065.5 mm (2.6 in)
196154.1 mm (2.1 in)
196261.2 mm (2.4 in)
196382.8 mm (3.3 in)
196468.8 mm (2.7 in)
196549.5 mm (1.9 in)
1966101.9 mm (4.0 in)
196745.7 mm (1.8 in)
196888.9 mm (3.5 in)
196993.5 mm (3.7 in)
197083.3 mm (3.3 in)
1971166.9 mm (6.6 in)
197275.7 mm (3.0 in)
197392.5 mm (3.6 in)
197451.8 mm (2.0 in)
1975205.7 mm (8.1 in)
197652.6 mm (2.1 in)
1977149.4 mm (5.9 in)
197892.7 mm (3.6 in)
197967.1 mm (2.6 in)
198043.2 mm (1.7 in)
198162.5 mm (2.5 in)
198260.5 mm (2.4 in)
198348.8 mm (1.9 in)
198492.7 mm (3.6 in)
198563.5 mm (2.5 in)
198659.9 mm (2.4 in)
198745.7 mm (1.8 in)
198896.5 mm (3.8 in)
199445.5 mm (1.8 in)
199545.2 mm (1.8 in)
1996114.6 mm (4.5 in)
1997144.8 mm (5.7 in)
199874.9 mm (2.9 in)
2011101.1 mm (4.0 in)
201280.0 mm (3.1 in)
201395.8 mm (3.8 in)
201492.5 mm (3.6 in)
201555.9 mm (2.2 in)
201691.9 mm (3.6 in)
201782.6 mm (3.3 in)
201847.0 mm (1.9 in)
201948.3 mm (1.9 in)
202080.8 mm (3.2 in)
202178.7 mm (3.1 in)
202245.7 mm (1.8 in)
202363.5 mm (2.5 in)
202467.8 mm (2.7 in)
202513.7 mm (0.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Blackwells Mills by year The wettest five days of the year at Blackwells Mills, 1956 to 2025. The record is 351.3 mm (13.8 in) in 1975, marked on the chart; the median year is 105.5 mm (4.2 in). 01002003004001960198020002020Record: 351.3 mm (13.8 in) in 1975
The wettest five days of the year at Blackwells Mills, 1956 to 2025. The record is 351.3 mm (13.8 in) in 1975, marked on the chart; the median year is 105.5 mm (4.2 in).
Wettest five days (Rx5day) at Blackwells Mills by year
YearWettest five days (Rx5day)
195659.4 mm (2.3 in)
195789.4 mm (3.5 in)
1958124.7 mm (4.9 in)
1959124.9 mm (4.9 in)
1960150.1 mm (5.9 in)
1961119.9 mm (4.7 in)
196275.0 mm (3.0 in)
1963106.1 mm (4.2 in)
196470.9 mm (2.8 in)
196549.5 mm (1.9 in)
1966121.5 mm (4.8 in)
196772.9 mm (2.9 in)
196897.5 mm (3.8 in)
1969120.4 mm (4.7 in)
1970113.5 mm (4.5 in)
1971197.4 mm (7.8 in)
197297.8 mm (3.9 in)
1973112.8 mm (4.4 in)
197484.1 mm (3.3 in)
1975351.3 mm (13.8 in)
197671.2 mm (2.8 in)
1977149.4 mm (5.9 in)
1978102.1 mm (4.0 in)
1979132.6 mm (5.2 in)
198071.1 mm (2.8 in)
198198.5 mm (3.9 in)
198288.2 mm (3.5 in)
1983103.4 mm (4.1 in)
1984159.8 mm (6.3 in)
1985107.2 mm (4.2 in)
1986119.9 mm (4.7 in)
198768.1 mm (2.7 in)
1988203.2 mm (8.0 in)
199471.7 mm (2.8 in)
199573.9 mm (2.9 in)
1996142.3 mm (5.6 in)
1997196.8 mm (7.7 in)
199882.1 mm (3.2 in)
2011141.7 mm (5.6 in)
201280.0 mm (3.1 in)
2013154.2 mm (6.1 in)
2014124.3 mm (4.9 in)
201571.2 mm (2.8 in)
2016115.5 mm (4.5 in)
2017106.2 mm (4.2 in)
201895.6 mm (3.8 in)
201996.1 mm (3.8 in)
2020105.5 mm (4.2 in)
2021152.4 mm (6.0 in)
2022106.4 mm (4.2 in)
202395.6 mm (3.8 in)
202493.2 mm (3.7 in)
202546.6 mm (1.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Blackwells Mills by year The longest dry spell of the year at Blackwells Mills, 1956 to 2025. The record is 41 days in 2024, marked on the chart; the median year is 18 days. 010203040501960198020002020Record: 41 days in 2024
The longest dry spell of the year at Blackwells Mills, 1956 to 2025. The record is 41 days in 2024, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Blackwells Mills by year
YearLongest dry spell (CDD)
195612 days
195715 days
195820 days
195913 days
196018 days
196114 days
196217 days
196323 days
196423 days
196519 days
196615 days
196719 days
196826 days
196915 days
197017 days
197121 days
197217 days
197325 days
197426 days
197513 days
197627 days
197720 days
197819 days
197911 days
198029 days
198115 days
198216 days
198316 days
198413 days
198519 days
198624 days
198711 days
198821 days
199419 days
199516 days
19969 days
199719 days
199810 days
201119 days
201215 days
201323 days
201419 days
201523 days
201617 days
201718 days
201811 days
201913 days
202016 days
202116 days
202218 days
202318 days
202441 days
202511 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

36 years, 1957 to 2023

A day with at least 74.3 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 207.2 mm (8.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Blackwells Mills: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years74.3 mm (2.9 in)
5 years100.7 mm (4.0 in)
10 years121.3 mm (4.8 in)
25 years151.7 mm (6.0 in)
50 years177.8 mm (7.0 in)Longer than the 36 years of record
100 years207.2 mm (8.2 in)Longer than the 36 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, 36 years of values from 1957 to 2023.

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: 205.7 mm (8.1 in) in 1975; 166.9 mm (6.6 in) in 1971; 144.8 mm (5.7 in) in 1997.

Download the Data

  • Data for Blackwells Mills standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Blackwells Mills 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 . Last revised (2026-10-12).