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Built 2026-10-17 (17 October 2026)

Duncan 10 W Weather Records (USC00342668)

Record envelope, standing records and threshold days for Duncan 10 W (USC00342668), Oklahoma, United States, with 115 years of record.

Key Facts for Duncan 10 W

  • Duncan 10 W (USC00342668) is a weather station in Oklahoma, United States at 34.49 latitude and -98.14 longitude, 340 m (1,115 ft) above sea level.
  • The station reports from 1912 to 2026, 115 years of record.
  • 0 records set at Duncan 10 W still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Duncan 10 W set a daily record precipitation of 41.9 mm (1.6 in) on 22 June 2026.

About the Station

  • Location: Oklahoma, United States, 34.49 latitude, -98.14 longitude.
  • Elevation: 340 m (1,115 ft).
  • Period of record: 1912 to 2026, 115 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 Duncan 10 W, with 2026 drawn through them The band shows the record high and record low for each calendar day at Duncan 10 W. 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 Duncan 10 W. 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 Duncan 10 W, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jann/an/an/an/a
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Marn/an/an/an/a
Aprn/an/an/an/a
Mayn/an/an/an/a
Junn/an/an/an/a
Juln/an/an/an/a
Augn/an/an/an/a
Sepn/an/an/an/a
Octn/an/an/an/a
Novn/an/an/an/a
Decn/an/an/an/a

Which Years Hold Standing Records

0 standing records
Standing records at Duncan 10 W by the year they were set 0 records at Duncan 10 W still stand. 00000000000
0 records at Duncan 10 W still stand.
Standing records at Duncan 10 W by the year they were set
Year setStanding records

Wettest Day of Each Month

May: 215.6 mm (8.5 in)
Record daily precipitation for each month at Duncan 10 W The wettest day on record for each calendar month at Duncan 10 W. The most was 215.6 mm (8.5 in) on 28 May 1987. 0100200300 Jan: 52.3 mm (2.1 in), 17 January 2020 Jan Feb: 85.3 mm (3.4 in), 23 February 1985 Feb Mar: 70.9 mm (2.8 in), 31 March 2007 Mar Apr: 119.1 mm (4.7 in), 30 April 2025 Apr May: 215.6 mm (8.5 in), 28 May 1987 May Jun: 89.9 mm (3.5 in), 13 June 2016 Jun Jul: 65.5 mm (2.6 in), 26 July 2013 Jul Aug: 204.5 mm (8.1 in), 19 August 2007 Aug Sep: 104.6 mm (4.1 in), 22 September 2018 Sep Oct: 156.7 mm (6.2 in), 20 October 1983 Oct Nov: 76.7 mm (3.0 in), 3 November 2024 Nov Dec: 75.7 mm (3.0 in), 19 December 1991 Dec
The wettest day on record for each calendar month at Duncan 10 W. The most was 215.6 mm (8.5 in) on 28 May 1987.
Record daily precipitation for each month at Duncan 10 W
MonthRecord daily precipitation (mm)Date
Jan52.3 mm (2.1 in)17 January 2020
Feb85.3 mm (3.4 in)23 February 1985
Mar70.9 mm (2.8 in)31 March 2007
Apr119.1 mm (4.7 in)30 April 2025
May215.6 mm (8.5 in)28 May 1987
Jun89.9 mm (3.5 in)13 June 2016
Jul65.5 mm (2.6 in)26 July 2013
Aug204.5 mm (8.1 in)19 August 2007
Sep104.6 mm (4.1 in)22 September 2018
Oct156.7 mm (6.2 in)20 October 1983
Nov76.7 mm (3.0 in)3 November 2024
Dec75.7 mm (3.0 in)19 December 1991

Latest Records

20
Latest records at Duncan 10 W
DateStationRecordValueBeat old record byOld record stoodSignificance
22 June 2026Duncan 10 W, USdaily rain41.9 mm (1.6 in)4.3 mm (0.17 in)5 years7 of 100 (Routine)
15 April 2026Duncan 10 W, USdaily rain25.4 mm (1.0 in)15.7 mm (0.6 in)13 years17 of 100 (Routine)
4 April 2026Duncan 10 W, USdaily rain60.2 mm (2.4 in)29.0 mm (1.1 in)29 years29 of 100 (Routine)
2 April 2026Duncan 10 W, USdaily rain24.1 mm (0.9 in)8.4 mm (0.33 in)25 years15 of 100 (Routine)
29 January 2026Duncan 10 W, USdaily snow depth (Tie)2.5 cm (1.0 in)tie26 years4 of 100 (Routine)
28 January 2026Duncan 10 W, USdaily snow depth (Tie)5.1 cm (2.0 in)tie26 years4 of 100 (Routine)
27 January 2026Duncan 10 W, USdaily snow depth7.6 cm (3.0 in)5.1 cm (2.0 in)26 years20 of 100 (Routine)
26 January 2026Duncan 10 W, USdaily snow depth7.6 cm (3.0 in)7.6 cm (3.0 in)44 years20 of 100 (Routine)
25 January 2026Duncan 10 W, USdaily snowfall4.3 cm (1.7 in)4.3 cm (1.7 in)44 years20 of 100 (Routine)
25 January 2026Duncan 10 W, USdaily snow depth7.6 cm (3.0 in)7.6 cm (3.0 in)44 years20 of 100 (Routine)
24 January 2026Duncan 10 W, USdaily snowfall3.3 cm (1.3 in)3.3 cm (1.3 in)44 years20 of 100 (Routine)
24 January 2026Duncan 10 W, USdaily snow depth2.5 cm (1.0 in)2.5 cm (1.0 in)44 years20 of 100 (Routine)
4 December 2025Duncan 10 W, USdaily snowfall1.3 cm (0.5 in)1.3 cm (0.5 in)44 years20 of 100 (Routine)
24 November 2025Duncan 10 W, USdaily rain37.8 mm (1.5 in)2.0 mm (0.08 in)24 years12 of 100 (Routine)
12 August 2025Duncan 10 W, USdaily rain27.9 mm (1.1 in)19.0 mm (0.7 in)44 years27 of 100 (Routine)
4 August 2025Duncan 10 W, USdaily rain17.5 mm (0.7 in)5.6 mm (0.22 in)30 years15 of 100 (Routine)
13 July 2025Duncan 10 W, USdaily rain27.2 mm (1.1 in)14.8 mm (0.6 in)38 years25 of 100 (Routine)
2 May 2025Duncan 10 W, USdaily rain48.5 mm (1.9 in)0.2 mm (0.01 in)35 years14 of 100 (Routine)
30 April 2025Duncan 10 W, USmonthly rain119.1 mm (4.7 in)14.2 mm (0.6 in)16 years27 of 100 (Routine)
27 April 2025Duncan 10 W, USdaily rain83.8 mm (3.3 in)35.0 mm (1.4 in)27 years35 of 100 (Notable)

Extremes by Year

1912 to 2026
Yearly extremes at Duncan 10 W: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)215.6 mm (8.5 in)198772.1 mm (2.8 in)46
Wettest five days (Rx5day)296.4 mm (11.7 in)1983109.9 mm (4.3 in)46
Longest dry spell (CDD)77 days200034 days46

Wettest day (Rx1day)

Wettest day (Rx1day) at Duncan 10 W by year The wettest day of the year at Duncan 10 W, 1912 to 2026. The record is 215.6 mm (8.5 in) in 1987, marked on the chart; the median year is 72.1 mm (2.8 in). 050100150200250192019401960198020002020Record: 215.6 mm (8.5 in) in 1987
The wettest day of the year at Duncan 10 W, 1912 to 2026. The record is 215.6 mm (8.5 in) in 1987, marked on the chart; the median year is 72.1 mm (2.8 in).
Wettest day (Rx1day) at Duncan 10 W by year
YearWettest day (Rx1day)
1912n/a
198162.7 mm (2.5 in)
1982102.1 mm (4.0 in)
1983156.7 mm (6.2 in)
198473.7 mm (2.9 in)
198588.9 mm (3.5 in)
198690.2 mm (3.6 in)
1987215.6 mm (8.5 in)
198866.5 mm (2.6 in)
198996.5 mm (3.8 in)
199064.8 mm (2.6 in)
199177.7 mm (3.1 in)
199256.6 mm (2.2 in)
199356.6 mm (2.2 in)
199480.5 mm (3.2 in)
199565.3 mm (2.6 in)
199650.0 mm (2.0 in)
199782.0 mm (3.2 in)
199848.8 mm (1.9 in)
199959.4 mm (2.3 in)
200092.5 mm (3.6 in)
200178.0 mm (3.1 in)
200250.3 mm (2.0 in)
200342.9 mm (1.7 in)
200453.8 mm (2.1 in)
200555.1 mm (2.2 in)
200668.6 mm (2.7 in)
2007204.5 mm (8.1 in)
200889.7 mm (3.5 in)
2009104.9 mm (4.1 in)
201082.8 mm (3.3 in)
201172.1 mm (2.8 in)
201264.5 mm (2.5 in)
201365.5 mm (2.6 in)
201448.5 mm (1.9 in)
201578.2 mm (3.1 in)
201689.9 mm (3.5 in)
201790.7 mm (3.6 in)
2018104.6 mm (4.1 in)
201967.8 mm (2.7 in)
202066.3 mm (2.6 in)
202157.4 mm (2.3 in)
202272.1 mm (2.8 in)
202343.7 mm (1.7 in)
202476.7 mm (3.0 in)
2025119.1 mm (4.7 in)
202660.2 mm (2.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Duncan 10 W by year The wettest five days of the year at Duncan 10 W, 1912 to 2026. The record is 296.4 mm (11.7 in) in 1983, marked on the chart; the median year is 109.9 mm (4.3 in). 0100200300192019401960198020002020Record: 296.4 mm (11.7 in) in 1983
The wettest five days of the year at Duncan 10 W, 1912 to 2026. The record is 296.4 mm (11.7 in) in 1983, marked on the chart; the median year is 109.9 mm (4.3 in).
Wettest five days (Rx5day) at Duncan 10 W by year
YearWettest five days (Rx5day)
1912n/a
1981146.6 mm (5.8 in)
1982159.3 mm (6.3 in)
1983296.4 mm (11.7 in)
198492.7 mm (3.6 in)
1985135.8 mm (5.3 in)
1986146.0 mm (5.7 in)
1987287.2 mm (11.3 in)
198886.1 mm (3.4 in)
1989161.8 mm (6.4 in)
1990110.3 mm (4.3 in)
1991156.2 mm (6.1 in)
199298.2 mm (3.9 in)
199362.0 mm (2.4 in)
1994124.5 mm (4.9 in)
1995104.4 mm (4.1 in)
1996118.6 mm (4.7 in)
1997115.1 mm (4.5 in)
1998103.1 mm (4.1 in)
199973.6 mm (2.9 in)
2000195.2 mm (7.7 in)
200182.8 mm (3.3 in)
200264.5 mm (2.5 in)
200383.5 mm (3.3 in)
200496.5 mm (3.8 in)
2005134.9 mm (5.3 in)
2006121.4 mm (4.8 in)
2007204.5 mm (8.1 in)
2008136.2 mm (5.4 in)
2009124.4 mm (4.9 in)
201083.6 mm (3.3 in)
201184.8 mm (3.3 in)
201287.3 mm (3.4 in)
2013108.7 mm (4.3 in)
201477.7 mm (3.1 in)
2015205.7 mm (8.1 in)
2016121.4 mm (4.8 in)
2017177.5 mm (7.0 in)
2018104.6 mm (4.1 in)
201979.7 mm (3.1 in)
2020109.5 mm (4.3 in)
202180.5 mm (3.2 in)
202299.0 mm (3.9 in)
202361.2 mm (2.4 in)
2024159.0 mm (6.3 in)
2025232.4 mm (9.1 in)
202686.3 mm (3.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Duncan 10 W by year The longest dry spell of the year at Duncan 10 W, 1912 to 2026. The record is 77 days in 2000, marked on the chart; the median year is 34 days. 020406080192019401960198020002020Record: 77 days in 2000
The longest dry spell of the year at Duncan 10 W, 1912 to 2026. The record is 77 days in 2000, marked on the chart; the median year is 34 days.
Longest dry spell (CDD) at Duncan 10 W by year
YearLongest dry spell (CDD)
1912n/a
198123 days
198226 days
198339 days
198439 days
198519 days
198649 days
198728 days
198834 days
198960 days
199038 days
199156 days
199247 days
199323 days
199421 days
199536 days
199675 days
199732 days
199830 days
199935 days
200077 days
200142 days
200228 days
200329 days
200424 days
200542 days
200627 days
200735 days
200830 days
200930 days
201034 days
201149 days
201232 days
201328 days
201433 days
201521 days
201627 days
201736 days
201839 days
201931 days
202044 days
202155 days
202229 days
202325 days
202437 days
202527 days
202665 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

43 years, 1982 to 2025

A day with at least 71.8 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 226.3 mm (8.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Duncan 10 W: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years71.8 mm (2.8 in)
5 years98.6 mm (3.9 in)
10 years121.0 mm (4.8 in)
25 years156.1 mm (6.1 in)
50 years188.2 mm (7.4 in)Longer than the 43 years of record
100 years226.3 mm (8.9 in)Longer than the 43 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, 43 years of values from 1982 to 2025.

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: 215.6 mm (8.5 in) in 1987; 204.5 mm (8.1 in) in 2007; 156.7 mm (6.2 in) in 1983.

Download the Data

  • Data for Duncan 10 W standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Duncan 10 W 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-12).