Built 2026-10-19 (19 October 2026)

South Colony Weather Records (USS0005M13S)

Record envelope, standing records and threshold days for South Colony (USS0005M13S), Colorado, United States, with 36 years of record.

Key Facts for South Colony

  • South Colony (USS0005M13S) is a weather station in Colorado, United States at 37.97 latitude and -105.54 longitude, 3,292 m (10,800 ft) above sea level.
  • The station reports from 1991 to 2026, 36 years of record.
  • 1,464 records set at South Colony still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • South Colony set a daily record precipitation of 48.3 mm (1.9 in) on 30 September 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Colorado, United States, 37.97 latitude, -105.54 longitude.
  • Elevation: 3,292 m (10,800 ft).
  • Period of record: 1991 to 2026, 36 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

23 days at or beyond a record
Daily record high and record low at South Colony, with 2026 drawn through them The band shows the record high and record low for each calendar day at South Colony. The lines show the 2026 daily maximum and minimum. 23 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at South Colony. The lines show the 2026 daily maximum and minimum. 23 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at South Colony, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan10.2 C (50.4 F)-29.2 C (-20.6 F)4.2 C (39.6 F)-23.6 C (-10.5 F)
Feb9.9 C (49.8 F)-30.2 C (-22.4 F)8.3 C (46.9 F)-18.1 C (-0.6 F)
Mar17.6 C (63.7 F)-26.8 C (-16.2 F)17.6 C (63.7 F)-16.0 C (3.2 F)
Apr19.7 C (67.5 F)-24.0 C (-11.2 F)14.4 C (57.9 F)-13.1 C (8.4 F)
May26.0 C (78.8 F)-19.3 C (-2.7 F)19.0 C (66.2 F)-12.9 C (8.8 F)
Jun27.6 C (81.7 F)-6.4 C (20.5 F)23.1 C (73.6 F)-1.9 C (28.6 F)
Jul26.3 C (79.3 F)-2.6 C (27.3 F)25.0 C (77.0 F)0.0 C (32.0 F)
Aug24.4 C (75.9 F)-2.5 C (27.5 F)24.1 C (75.4 F)2.5 C (36.5 F)
Sep23.2 C (73.8 F)-9.5 C (14.9 F)21.3 C (70.3 F)-2.1 C (28.2 F)
Oct18.7 C (65.7 F)-23.3 C (-9.9 F)16.3 C (61.3 F)-3.5 C (25.7 F)
Nov13.1 C (55.6 F)-27.2 C (-17.0 F)n/an/a
Dec8.7 C (47.7 F)-33.3 C (-27.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at South Colony by the year they were set 1,464 records at South Colony still stand. 1995 holds the most, with 66. 0204060801991: 121992: 471993: 231994: 341995: 661996: 531997: 511998: 391999: 352000: 392001: 292002: 332003: 572004: 502005: 442006: 372007: 302008: 382009: 402010: 412011: 522012: 322013: 622014: 342015: 372016: 342017: 472018: 282019: 362020: 622021: 462022: 552023: 262024: 242025: 542026: 37199119951999200320072011201520192023
1,464 records at South Colony still stand. 1995 holds the most, with 66.
Standing records at South Colony by the year they were set
Year setStanding records
199112
199247
199323
199434
199566
199653
199751
199839
199935
200039
200129
200233
200357
200450
200544
200637
200730
200838
200940
201041
201152
201232
201362
201434
201537
201634
201747
201828
201936
202062
202146
202255
202326
202424
202554
202637

Wettest Day of Each Month

Dec: 91.4 mm (3.6 in)
Record daily precipitation for each month at South Colony The wettest day on record for each calendar month at South Colony. The most was 91.4 mm (3.6 in) on 1 December 2007. 0255075100 Jan: 45.7 mm (1.8 in), 17 January 1996 Jan Feb: 48.3 mm (1.9 in), 14 February 1995 Feb Mar: 61.0 mm (2.4 in), 12 March 2019 Mar Apr: 55.9 mm (2.2 in), 2 April 1999 Apr May: 40.6 mm (1.6 in), 9 May 2015 May Jun: 33.0 mm (1.3 in), 17 June 1995 Jun Jul: 88.9 mm (3.5 in), 26 July 2020 Jul Aug: 61.0 mm (2.4 in), 24 August 1992 Aug Sep: 71.1 mm (2.8 in), 19 September 2004 Sep Oct: 50.8 mm (2.0 in), 26 October 2011 Oct Nov: 73.7 mm (2.9 in), 28 November 1997 Nov Dec: 91.4 mm (3.6 in), 1 December 2007 Dec
The wettest day on record for each calendar month at South Colony. The most was 91.4 mm (3.6 in) on 1 December 2007.
Record daily precipitation for each month at South Colony
MonthRecord daily precipitation (mm)Date
Jan45.7 mm (1.8 in)17 January 1996
Feb48.3 mm (1.9 in)14 February 1995
Mar61.0 mm (2.4 in)12 March 2019
Apr55.9 mm (2.2 in)2 April 1999
May40.6 mm (1.6 in)9 May 2015
Jun33.0 mm (1.3 in)17 June 1995
Jul88.9 mm (3.5 in)26 July 2020
Aug61.0 mm (2.4 in)24 August 1992
Sep71.1 mm (2.8 in)19 September 2004
Oct50.8 mm (2.0 in)26 October 2011
Nov73.7 mm (2.9 in)28 November 1997
Dec91.4 mm (3.6 in)1 December 2007

Period of Record Coverage

1991 to 2026
Days with data per year at South Colony 36 years of record at South Colony, 1991 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1991, 1993, 1994, 2006, 2007, 2016, 2026. 1991: 97 of 365 days1992: 357 of 366 days1993: 303 of 365 days1994: 313 of 365 days1995: 365 of 365 days1996: 339 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 364 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 364 of 365 days2006: 314 of 365 days2007: 320 of 365 days2008: 343 of 366 days2009: 332 of 365 days2010: 362 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 330 of 365 days2014: 364 of 365 days2015: 365 of 365 days2016: 308 of 366 days2017: 337 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 364 of 365 days2023: 365 of 365 days2024: 365 of 366 days2025: 365 of 365 days2026: 286 of 365 days1995200020052010201520202025
36 years of record at South Colony, 1991 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1991, 1993, 1994, 2006, 2007, 2016, 2026.
Days with data per year at South Colony
YearDays with dataShare of yearComplete
19919727%No
199235798%Yes
199330383%No
199431386%No
1995365100%Yes
199633993%Yes
1997365100%Yes
1998365100%Yes
1999364100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
2004366100%Yes
2005364100%Yes
200631486%No
200732088%No
200834394%Yes
200933291%Yes
201036299%Yes
2011365100%Yes
2012366100%Yes
201333090%Yes
2014364100%Yes
2015365100%Yes
201630884%No
201733792%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
2022364100%Yes
2023365100%Yes
2024365100%Yes
2025365100%Yes
202628678%No

Latest Records

20
Latest records at South Colony
DateStationRecordValueBeat old record byOld record stoodSignificance
30 September 2026South Colony, USdaily rain (Provisional)48.3 mm (1.9 in)17.8 mm (0.7 in)32 years28 of 100 (Routine)
28 September 2026South Colony, USmonthly rain (Provisional)78.7 mm (3.1 in)7.6 mm (0.30 in)22 years26 of 100 (Routine)
25 September 2026South Colony, USdaily rain (Provisional)15.2 mm (0.6 in)10.1 mm (0.4 in)13 years16 of 100 (Routine)
25 September 2026South Colony, USdaily low max (Provisional)6.9 C (44.4 F)1.6 C (2.9 F)8 years8 of 100 (Routine)
24 September 2026South Colony, USdaily rain (Provisional)12.7 mm (0.5 in)5.1 mm (0.20 in)31 years16 of 100 (Routine)
17 September 2026South Colony, USdaily high min (Provisional)6.9 C (44.4 F)0.8 C (1.4 F)12 years8 of 100 (Routine)
16 September 2026South Colony, USdaily rain (Provisional)25.4 mm (1.0 in)10.2 mm (0.4 in)33 years22 of 100 (Routine)
16 September 2026South Colony, USdaily high min (Provisional)7.0 C (44.6 F)0.6 C (1.1 F)11 years7 of 100 (Routine)
14 September 2026South Colony, USdaily high min (Provisional)7.6 C (45.7 F)2.1 C (3.8 F)4 years10 of 100 (Routine)
13 September 2026South Colony, USdaily high max (Provisional)20.6 C (69.1 F)0.3 C (0.5 F)25 years10 of 100 (Routine)
7 September 2026South Colony, USdaily high min (Provisional)8.3 C (46.9 F)1.5 C (2.7 F)24 years14 of 100 (Routine)
4 September 2026South Colony, USdaily high min (Provisional)8.2 C (46.8 F)0.1 C (0.2 F)16 years7 of 100 (Routine)
3 September 2026South Colony, USdaily high min (Provisional)6.5 C (43.7 F)0.2 C (0.4 F)24 years10 of 100 (Routine)
19 August 2026South Colony, USdaily high max (Provisional)23.6 C (74.5 F)0.9 C (1.6 F)3 years6 of 100 (Routine)
12 August 2026South Colony, USdaily high max23.3 C (73.9 F)0.4 C (0.7 F)24 years11 of 100 (Routine)
10 August 2026South Colony, USdaily high max24.1 C (75.4 F)0.2 C (0.4 F)25 years10 of 100 (Routine)
9 August 2026South Colony, USdaily high max24.0 C (75.2 F)0.3 C (0.5 F)25 years11 of 100 (Routine)
8 August 2026South Colony, USdaily high max23.9 C (75.0 F)0.5 C (0.9 F)28 years12 of 100 (Routine)
6 August 2026South Colony, USdaily high max23.6 C (74.5 F)0.1 C (0.2 F)23 years9 of 100 (Routine)
5 August 2026South Colony, USdaily high max23.7 C (74.7 F)0.4 C (0.7 F)23 years10 of 100 (Routine)

Climate Trend

24 complete years, 1992 to 2025
Annual mean temperature at South Colony as warming stripes, 1992 to 2025 One stripe for each of 24 complete years at South Colony, 1992 to 2025. Blue stripes are years cooler than the station's own mean of 1.5 C (34.8 F); red stripes are warmer. The coolest year was 1992, at 0.5 C (32.8 F), and the warmest was 2012, at 2.7 C (36.8 F). The strongest colour marks a difference of 1.2 C (2.2 F). 1992: 0.5 C, -1.1 C from the station mean1995: 1.1 C, -0.4 C from the station mean1997: 0.7 C, -0.9 C from the station mean1998: 1.0 C, -0.5 C from the station mean1999: 1.5 C, -0.1 C from the station mean2000: 1.7 C, +0.1 C from the station mean2001: 1.3 C, -0.2 C from the station mean2002: 1.3 C, -0.2 C from the station mean2003: 1.7 C, +0.2 C from the station mean2004: 0.9 C, -0.7 C from the station mean2005: 1.5 C, 0.0 C from the station mean2010: 1.6 C, +0.1 C from the station mean2011: 1.6 C, 0.0 C from the station mean2012: 2.7 C, +1.1 C from the station mean2014: 1.7 C, +0.2 C from the station mean2015: 2.1 C, +0.6 C from the station mean2018: 2.2 C, +0.7 C from the station mean2019: 1.2 C, -0.3 C from the station mean2020: 2.0 C, +0.5 C from the station mean2021: 2.2 C, +0.6 C from the station mean2022: 1.4 C, -0.1 C from the station mean2023: 1.3 C, -0.3 C from the station mean2024: 1.7 C, +0.2 C from the station mean2025: 2.1 C, +0.6 C from the station mean19921995200020052010201520202025
One stripe for each of 24 complete years at South Colony, 1992 to 2025. Blue stripes are years cooler than the station's own mean of 1.5 C (34.8 F); red stripes are warmer. The coolest year was 1992, at 0.5 C (32.8 F), and the warmest was 2012, at 2.7 C (36.8 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at South Colony as warming stripes, 1992 to 2025
YearAnnual mean temperatureDifference from the station mean
19920.5 C-1.08 C
19951.1 C-0.41 C
19970.7 C-0.88 C
19981.0 C-0.54 C
19991.5 C-0.05 C
20001.7 C+0.14 C
20011.3 C-0.21 C
20021.3 C-0.20 C
20031.7 C+0.16 C
20040.9 C-0.65 C
20051.5 C-0.01 C
20101.6 C+0.09 C
20111.6 C+0.01 C
20122.7 C+1.14 C
20141.7 C+0.19 C
20152.1 C+0.58 C
20182.2 C+0.67 C
20191.2 C-0.32 C
20202.0 C+0.50 C
20212.2 C+0.61 C
20221.4 C-0.10 C
20231.3 C-0.25 C
20241.7 C+0.16 C
20252.1 C+0.56 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1991 to 2026
Yearly extremes at South Colony: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)27.6 C (81.7 F)201324.4 C (75.9 F)36
Coldest night (TNn)-33.3 C (-27.9 F)1996-26.6 C (-15.9 F)36
Wettest day (Rx1day)91.4 mm (3.6 in)200747.0 mm (1.9 in)36
Wettest five days (Rx5day)182.9 mm (7.2 in)200791.5 mm (3.6 in)36
Longest dry spell (CDD)49 days200422 days36

Hottest day (TXx)

Hottest day (TXx) at South Colony by year The hottest day of the year at South Colony, 1991 to 2026. The record is 27.6 C (81.7 F) in 2013, marked on the chart; the median year is 24.4 C (75.9 F). 15202530200020102020Record: 27.6 C (81.7 F) in 2013
The hottest day of the year at South Colony, 1991 to 2026. The record is 27.6 C (81.7 F) in 2013, marked on the chart; the median year is 24.4 C (75.9 F).
Hottest day (TXx) at South Colony by year
YearHottest day (TXx)
199116.3 C (61.3 F)
199223.1 C (73.6 F)
199321.7 C (71.1 F)
199425.2 C (77.4 F)
199524.9 C (76.8 F)
199623.9 C (75.0 F)
199723.7 C (74.7 F)
199825.2 C (77.4 F)
199923.6 C (74.5 F)
200024.1 C (75.4 F)
200125.7 C (78.3 F)
200226.3 C (79.3 F)
200326.0 C (78.8 F)
200424.5 C (76.1 F)
200525.3 C (77.5 F)
200624.0 C (75.2 F)
200723.6 C (74.5 F)
200823.6 C (74.5 F)
200923.3 C (73.9 F)
201025.1 C (77.2 F)
201124.2 C (75.6 F)
201225.4 C (77.7 F)
201327.6 C (81.7 F)
201424.2 C (75.6 F)
201525.0 C (77.0 F)
201625.1 C (77.2 F)
201724.0 C (75.2 F)
201824.5 C (76.1 F)
201923.6 C (74.5 F)
202025.2 C (77.4 F)
202124.7 C (76.5 F)
202224.3 C (75.7 F)
202325.7 C (78.3 F)
202423.2 C (73.8 F)
202523.9 C (75.0 F)
202625.0 C (77.0 F)

Coldest night (TNn)

Coldest night (TNn) at South Colony by year The coldest night of the year at South Colony, 1991 to 2026. The record is -33.3 C (-27.9 F) in 1996, marked on the chart; the median year is -26.6 C (-15.9 F). -35-30-25-20200020102020Record: -33.3 C (-27.9 F) in 1996
The coldest night of the year at South Colony, 1991 to 2026. The record is -33.3 C (-27.9 F) in 1996, marked on the chart; the median year is -26.6 C (-15.9 F).
Coldest night (TNn) at South Colony by year
YearColdest night (TNn)
1991-27.2 C (-17.0 F)
1992-24.6 C (-12.3 F)
1993-24.8 C (-12.6 F)
1994-27.6 C (-17.7 F)
1995-25.6 C (-14.1 F)
1996-33.3 C (-27.9 F)
1997-25.9 C (-14.6 F)
1998-27.4 C (-17.3 F)
1999-22.4 C (-8.3 F)
2000-24.8 C (-12.6 F)
2001-27.2 C (-17.0 F)
2002-24.0 C (-11.2 F)
2003-25.1 C (-13.2 F)
2004-29.6 C (-21.3 F)
2005-26.0 C (-14.8 F)
2006-27.3 C (-17.1 F)
2007-22.7 C (-8.9 F)
2008-29.2 C (-20.6 F)
2009-27.5 C (-17.5 F)
2010-25.2 C (-13.4 F)
2011-30.2 C (-22.4 F)
2012-25.1 C (-13.2 F)
2013-28.4 C (-19.1 F)
2014-24.2 C (-11.6 F)
2015-25.0 C (-13.0 F)
2016-26.9 C (-16.4 F)
2017-28.0 C (-18.4 F)
2018-22.9 C (-9.2 F)
2019-28.2 C (-18.8 F)
2020-27.2 C (-17.0 F)
2021-26.3 C (-15.3 F)
2022-29.4 C (-20.9 F)
2023-29.2 C (-20.6 F)
2024-25.0 C (-13.0 F)
2025-27.8 C (-18.0 F)
2026-23.6 C (-10.5 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at South Colony by year The wettest day of the year at South Colony, 1991 to 2026. The record is 91.4 mm (3.6 in) in 2007, marked on the chart; the median year is 47.0 mm (1.9 in). 20406080100200020102020Record: 91.4 mm (3.6 in) in 2007
The wettest day of the year at South Colony, 1991 to 2026. The record is 91.4 mm (3.6 in) in 2007, marked on the chart; the median year is 47.0 mm (1.9 in).
Wettest day (Rx1day) at South Colony by year
YearWettest day (Rx1day)
199130.5 mm (1.2 in)
199261.0 mm (2.4 in)
199350.8 mm (2.0 in)
199450.8 mm (2.0 in)
199553.3 mm (2.1 in)
199645.7 mm (1.8 in)
199773.7 mm (2.9 in)
199840.6 mm (1.6 in)
199955.9 mm (2.2 in)
200053.3 mm (2.1 in)
200155.9 mm (2.2 in)
200235.6 mm (1.4 in)
200353.3 mm (2.1 in)
200471.1 mm (2.8 in)
200530.5 mm (1.2 in)
200638.1 mm (1.5 in)
200791.4 mm (3.6 in)
200838.1 mm (1.5 in)
200943.2 mm (1.7 in)
201045.7 mm (1.8 in)
201150.8 mm (2.0 in)
201243.2 mm (1.7 in)
201348.3 mm (1.9 in)
201438.1 mm (1.5 in)
201540.6 mm (1.6 in)
201643.2 mm (1.7 in)
201745.7 mm (1.8 in)
201835.6 mm (1.4 in)
201961.0 mm (2.4 in)
202088.9 mm (3.5 in)
202138.1 mm (1.5 in)
202240.6 mm (1.6 in)
202348.3 mm (1.9 in)
202440.6 mm (1.6 in)
202548.3 mm (1.9 in)
202678.7 mm (3.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at South Colony by year The wettest five days of the year at South Colony, 1991 to 2026. The record is 182.9 mm (7.2 in) in 2007, marked on the chart; the median year is 91.5 mm (3.6 in). 50100150200200020102020Record: 182.9 mm (7.2 in) in 2007
The wettest five days of the year at South Colony, 1991 to 2026. The record is 182.9 mm (7.2 in) in 2007, marked on the chart; the median year is 91.5 mm (3.6 in).
Wettest five days (Rx5day) at South Colony by year
YearWettest five days (Rx5day)
199189.0 mm (3.5 in)
1992104.1 mm (4.1 in)
199393.9 mm (3.7 in)
199491.4 mm (3.6 in)
1995106.6 mm (4.2 in)
1996111.7 mm (4.4 in)
1997124.4 mm (4.9 in)
199876.2 mm (3.0 in)
199991.5 mm (3.6 in)
2000111.7 mm (4.4 in)
200176.2 mm (3.0 in)
200261.0 mm (2.4 in)
2003104.2 mm (4.1 in)
200496.5 mm (3.8 in)
200565.9 mm (2.6 in)
200688.9 mm (3.5 in)
2007182.9 mm (7.2 in)
2008109.2 mm (4.3 in)
200986.3 mm (3.4 in)
201073.6 mm (2.9 in)
201199.0 mm (3.9 in)
201255.9 mm (2.2 in)
201388.9 mm (3.5 in)
201473.7 mm (2.9 in)
201583.8 mm (3.3 in)
201678.7 mm (3.1 in)
201783.8 mm (3.3 in)
201861.0 mm (2.4 in)
2019127.0 mm (5.0 in)
2020142.3 mm (5.6 in)
202173.6 mm (2.9 in)
202293.9 mm (3.7 in)
2023104.1 mm (4.1 in)
202483.8 mm (3.3 in)
2025134.6 mm (5.3 in)
2026142.3 mm (5.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at South Colony by year The longest dry spell of the year at South Colony, 1991 to 2026. The record is 49 days in 2004, marked on the chart; the median year is 22 days. 1020304050200020102020Record: 49 days in 2004
The longest dry spell of the year at South Colony, 1991 to 2026. The record is 49 days in 2004, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at South Colony by year
YearLongest dry spell (CDD)
199126 days
199221 days
199323 days
199419 days
199520 days
199617 days
199722 days
199824 days
199922 days
200020 days
200118 days
200217 days
200329 days
200449 days
200519 days
200616 days
200731 days
200822 days
200916 days
201024 days
201125 days
201223 days
201312 days
201421 days
201520 days
201635 days
201720 days
201819 days
201919 days
202033 days
202120 days
202217 days
202326 days
202423 days
202522 days
202644 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.

Frost Dates and Growing Season

24 years with a frost

Across 24 years with a frost, the median last spring frost at South Colony falls on 23 June and the median first autumn frost on 14 August, which leaves a median of 55 days between them.

Frost dates and growing season at South Colony
MeasureMedian, all yearsEarliest periodRecent period (1992 to 2025)Recent against earliestFitted trend
Last spring frost23 Junen/a23 Junen/an/a
First autumn frost14 Augustn/a14 Augustn/an/a
Growing days55 daysn/a55 daysn/an/a

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

34 years, 1992 to 2025

A day with at least 46.4 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 105.6 mm (4.2 in) of rain is expected about once in 100 years.

Rainfall return levels at South Colony: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years46.4 mm (1.8 in)
5 years58.0 mm (2.3 in)
10 years67.2 mm (2.6 in)
25 years80.7 mm (3.2 in)
50 years92.4 mm (3.6 in)Longer than the 34 years of record
100 years105.6 mm (4.2 in)Longer than the 34 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, 34 years of values from 1992 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: 91.4 mm (3.6 in) in 2007; 88.9 mm (3.5 in) in 2020; 73.7 mm (2.9 in) in 1997.

Download the Data

  • Data for South Colony standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for South Colony 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). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-17).