Built 2026-10-15 (15 October 2026)

Sanford Dam Weather Records (USC00418040)

Record envelope, standing records and threshold days for Sanford Dam (USC00418040), Texas, United States, with 34 years of record.

Key Facts for Sanford Dam

  • Sanford Dam (USC00418040) is a weather station in Texas, United States at 35.70 latitude and -101.55 longitude, 895 m (2,936 ft) above sea level.
  • The station reports from 1993 to 2026, 34 years of record.
  • 1,464 records set at Sanford Dam still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Sanford Dam set an all-time record daily precipitation of 115.8 mm (4.6 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: Texas, United States, 35.70 latitude, -101.55 longitude.
  • Elevation: 895 m (2,936 ft).
  • Period of record: 1993 to 2026, 34 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

53 days at or beyond a record
Daily record high and record low at Sanford Dam, with 2026 drawn through them The band shows the record high and record low for each calendar day at Sanford Dam. The lines show the 2026 daily maximum and minimum. 53 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Sanford Dam. The lines show the 2026 daily maximum and minimum. 53 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Sanford Dam, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan27.8 C (82.0 F)-20.0 C (-4.0 F)23.3 C (73.9 F)-20.0 C (-4.0 F)
Feb31.1 C (88.0 F)-22.2 C (-8.0 F)30.0 C (86.0 F)-12.2 C (10.0 F)
Mar40.6 C (105.1 F)-15.0 C (5.0 F)40.6 C (105.1 F)-12.2 C (10.0 F)
Apr38.9 C (102.0 F)-7.8 C (18.0 F)33.3 C (91.9 F)1.1 C (34.0 F)
May43.9 C (111.0 F)-1.7 C (28.9 F)39.4 C (102.9 F)4.4 C (39.9 F)
Jun45.0 C (113.0 F)4.4 C (39.9 F)42.8 C (109.0 F)13.3 C (55.9 F)
Jul45.6 C (114.1 F)12.2 C (54.0 F)42.2 C (108.0 F)15.6 C (60.1 F)
Aug43.9 C (111.0 F)11.1 C (52.0 F)43.3 C (109.9 F)16.7 C (62.1 F)
Sep42.2 C (108.0 F)1.1 C (34.0 F)41.1 C (106.0 F)11.1 C (52.0 F)
Oct37.8 C (100.0 F)-8.9 C (16.0 F)31.7 C (89.1 F)11.1 C (52.0 F)
Nov32.2 C (90.0 F)-12.8 C (9.0 F)n/an/a
Dec27.8 C (82.0 F)-20.0 C (-4.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Sanford Dam by the year they were set 1,464 records at Sanford Dam still stand. 2014 holds the most, with 70. 0204060801993: 101994: 321995: 561996: 581997: 481998: 421999: 412000: 672001: 302002: 372003: 462004: 402005: 342006: 552007: 332008: 392009: 332010: 282011: 632012: 512013: 492014: 702015: 282016: 302017: 422018: 432019: 532020: 532021: 452022: 502023: 322024: 292025: 452026: 52199319972001200520092013201720212025
1,464 records at Sanford Dam still stand. 2014 holds the most, with 70.
Standing records at Sanford Dam by the year they were set
Year setStanding records
199310
199432
199556
199658
199748
199842
199941
200067
200130
200237
200346
200440
200534
200655
200733
200839
200933
201028
201163
201251
201349
201470
201528
201630
201742
201843
201953
202053
202145
202250
202332
202429
202545
202652

Wettest Day of Each Month

Jun: 107.4 mm (4.2 in)
Record daily precipitation for each month at Sanford Dam The wettest day on record for each calendar month at Sanford Dam. The most was 107.4 mm (4.2 in) on 15 June 2015. 050100150 Jan: 56.4 mm (2.2 in), 15 January 2017 Jan Feb: 26.4 mm (1.0 in), 4 February 2010 Feb Mar: 50.8 mm (2.0 in), 29 March 2007 Mar Apr: 73.2 mm (2.9 in), 12 April 2012 Apr May: 71.1 mm (2.8 in), 8 May 2019 May Jun: 107.4 mm (4.2 in), 15 June 2015 Jun Jul: 92.7 mm (3.6 in), 12 July 2025 Jul Aug: 52.3 mm (2.1 in), 2 August 2024 Aug Sep: 91.4 mm (3.6 in), 23 September 2004 Sep Oct: 69.9 mm (2.8 in), 31 October 1998 Oct Nov: 48.3 mm (1.9 in), 12 November 2010 Nov Dec: 37.8 mm (1.5 in), 14 December 2023 Dec
The wettest day on record for each calendar month at Sanford Dam. The most was 107.4 mm (4.2 in) on 15 June 2015.
Record daily precipitation for each month at Sanford Dam
MonthRecord daily precipitation (mm)Date
Jan56.4 mm (2.2 in)15 January 2017
Feb26.4 mm (1.0 in)4 February 2010
Mar50.8 mm (2.0 in)29 March 2007
Apr73.2 mm (2.9 in)12 April 2012
May71.1 mm (2.8 in)8 May 2019
Jun107.4 mm (4.2 in)15 June 2015
Jul92.7 mm (3.6 in)12 July 2025
Aug52.3 mm (2.1 in)2 August 2024
Sep91.4 mm (3.6 in)23 September 2004
Oct69.9 mm (2.8 in)31 October 1998
Nov48.3 mm (1.9 in)12 November 2010
Dec37.8 mm (1.5 in)14 December 2023

Period of Record Coverage

1993 to 2026
Days with data per year at Sanford Dam 34 years of record at Sanford Dam, 1993 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1993, 2026. 1993: 91 of 365 days1994: 365 of 365 days1995: 363 of 365 days1996: 365 of 366 days1997: 358 of 365 days1998: 363 of 365 days1999: 362 of 365 days2000: 361 of 366 days2001: 363 of 365 days2002: 359 of 365 days2003: 361 of 365 days2004: 362 of 366 days2005: 365 of 365 days2006: 363 of 365 days2007: 359 of 365 days2008: 360 of 366 days2009: 336 of 365 days2010: 363 of 365 days2011: 359 of 365 days2012: 366 of 366 days2013: 363 of 365 days2014: 363 of 365 days2015: 364 of 365 days2016: 366 of 366 days2017: 365 of 365 days2018: 364 of 365 days2019: 365 of 365 days2020: 365 of 366 days2021: 361 of 365 days2022: 363 of 365 days2023: 365 of 365 days2024: 364 of 366 days2025: 364 of 365 days2026: 282 of 365 days1995200020052010201520202025
34 years of record at Sanford Dam, 1993 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1993, 2026.
Days with data per year at Sanford Dam
YearDays with dataShare of yearComplete
19939125%No
1994365100%Yes
199536399%Yes
1996365100%Yes
199735898%Yes
199836399%Yes
199936299%Yes
200036199%Yes
200136399%Yes
200235998%Yes
200336199%Yes
200436299%Yes
2005365100%Yes
200636399%Yes
200735998%Yes
200836098%Yes
200933692%Yes
201036399%Yes
201135998%Yes
2012366100%Yes
201336399%Yes
201436399%Yes
2015364100%Yes
2016366100%Yes
2017365100%Yes
2018364100%Yes
2019365100%Yes
2020365100%Yes
202136199%Yes
202236399%Yes
2023365100%Yes
202436499%Yes
2025364100%Yes
202628277%No

Latest Records

20
Latest records at Sanford Dam
DateStationRecordValueBeat old record byOld record stoodSignificance
30 September 2026Sanford Dam, USall-time rain (Provisional)115.8 mm (4.6 in)8.4 mm (0.33 in)11 years33 of 100 (Routine)
26 September 2026Sanford Dam, USdaily rain (Provisional)41.4 mm (1.6 in)25.7 mm (1.0 in)8 years28 of 100 (Routine)
25 September 2026Sanford Dam, USdaily rain (Provisional)22.4 mm (0.9 in)11.0 mm (0.4 in)31 years20 of 100 (Routine)
24 September 2026Sanford Dam, USdaily high min (Provisional)20.0 C (68.0 F)2.2 C (4.0 F)19 years13 of 100 (Routine)
23 September 2026Sanford Dam, USdaily high min (Tie, Provisional)20.0 C (68.0 F)tie20 years2 of 100 (Routine)
19 September 2026Sanford Dam, USdaily high min (Provisional)22.2 C (72.0 F)0.5 C (0.9 F)4 years5 of 100 (Routine)
18 September 2026Sanford Dam, USdaily high min (Provisional)22.8 C (73.0 F)0.6 C (1.1 F)4 years5 of 100 (Routine)
14 September 2026Sanford Dam, USdaily high min (Provisional)24.4 C (75.9 F)4.4 C (7.9 F)28 years22 of 100 (Routine)
13 September 2026Sanford Dam, USdaily high min (Provisional)25.6 C (78.1 F)3.4 C (6.1 F)28 years19 of 100 (Routine)
13 September 2026Sanford Dam, USdaily high max (Provisional)41.1 C (106.0 F)3.3 C (5.9 F)4 years10 of 100 (Routine)
10 September 2026Sanford Dam, USdaily high max (Provisional)38.3 C (100.9 F)1.6 C (2.9 F)25 years13 of 100 (Routine)
10 September 2026Sanford Dam, USdaily rain (Provisional)3.8 mm (0.15 in)0.8 mm (0.03 in)23 years9 of 100 (Routine)
10 September 2026Sanford Dam, USdaily high min (Provisional)22.2 C (72.0 F)1.1 C (2.0 F)12 years8 of 100 (Routine)
9 September 2026Sanford Dam, USdaily high max (Provisional)37.8 C (100.0 F)1.1 C (2.0 F)25 years12 of 100 (Routine)
8 September 2026Sanford Dam, USdaily high min (Provisional)24.4 C (75.9 F)2.7 C (4.9 F)28 years17 of 100 (Routine)
7 September 2026Sanford Dam, USall-time high min (Provisional)29.4 C (84.9 F)0.5 C (0.9 F)4 years25 of 100 (Routine)
6 September 2026Sanford Dam, USdaily high min (Provisional)23.9 C (75.0 F)1.1 C (2.0 F)31 years14 of 100 (Routine)
5 September 2026Sanford Dam, USmonthly high min (Tie, Provisional)24.4 C (75.9 F)tie0 years3 of 100 (Routine)
4 September 2026Sanford Dam, USdaily high min (Provisional)23.9 C (75.0 F)0.6 C (1.1 F)31 years13 of 100 (Routine)
3 September 2026Sanford Dam, USmonthly high min (Tie, Provisional)24.4 C (75.9 F)tie0 years3 of 100 (Routine)

Climate Trend

31 complete years, 1994 to 2025
Annual mean temperature at Sanford Dam as warming stripes, 1994 to 2025 One stripe for each of 31 complete years at Sanford Dam, 1994 to 2025. Blue stripes are years cooler than the station's own mean of 15.3 C (59.6 F); red stripes are warmer. The coolest year was 2002, at 14.4 C (57.8 F), and the warmest was 2012, at 16.7 C (62.1 F). The strongest colour marks a difference of 1.4 C (2.5 F). 1994: 15.6 C, +0.3 C from the station mean1995: 15.1 C, -0.2 C from the station mean1996: 15.3 C, -0.1 C from the station mean1997: 14.5 C, -0.8 C from the station mean1998: 16.3 C, +1.0 C from the station mean1999: 16.0 C, +0.7 C from the station mean2000: 16.0 C, +0.7 C from the station mean2001: 15.3 C, 0.0 C from the station mean2002: 14.4 C, -1.0 C from the station mean2003: 15.1 C, -0.2 C from the station mean2004: 14.8 C, -0.5 C from the station mean2005: 15.1 C, -0.2 C from the station mean2006: 15.9 C, +0.6 C from the station mean2007: 14.8 C, -0.5 C from the station mean2008: 15.7 C, +0.4 C from the station mean2010: 15.7 C, +0.4 C from the station mean2011: 15.8 C, +0.4 C from the station mean2012: 16.7 C, +1.4 C from the station mean2013: 15.0 C, -0.4 C from the station mean2014: 14.9 C, -0.5 C from the station mean2015: 14.7 C, -0.6 C from the station mean2016: 15.5 C, +0.2 C from the station mean2017: 15.4 C, +0.1 C from the station mean2018: 14.9 C, -0.5 C from the station mean2019: 14.4 C, -0.9 C from the station mean2020: 15.2 C, -0.1 C from the station mean2021: 14.9 C, -0.4 C from the station mean2022: 15.0 C, -0.3 C from the station mean2023: 15.5 C, +0.1 C from the station mean2024: 16.3 C, +1.0 C from the station mean2025: 15.4 C, 0.0 C from the station mean1994200020052010201520202025
One stripe for each of 31 complete years at Sanford Dam, 1994 to 2025. Blue stripes are years cooler than the station's own mean of 15.3 C (59.6 F); red stripes are warmer. The coolest year was 2002, at 14.4 C (57.8 F), and the warmest was 2012, at 16.7 C (62.1 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Sanford Dam as warming stripes, 1994 to 2025
YearAnnual mean temperatureDifference from the station mean
199415.6 C+0.27 C
199515.1 C-0.20 C
199615.3 C-0.05 C
199714.5 C-0.82 C
199816.3 C+1.01 C
199916.0 C+0.70 C
200016.0 C+0.71 C
200115.3 C-0.03 C
200214.4 C-0.97 C
200315.1 C-0.20 C
200414.8 C-0.52 C
200515.1 C-0.22 C
200615.9 C+0.59 C
200714.8 C-0.54 C
200815.7 C+0.39 C
201015.7 C+0.41 C
201115.8 C+0.44 C
201216.7 C+1.39 C
201315.0 C-0.37 C
201414.9 C-0.47 C
201514.7 C-0.60 C
201615.5 C+0.19 C
201715.4 C+0.06 C
201814.9 C-0.45 C
201914.4 C-0.93 C
202015.2 C-0.11 C
202114.9 C-0.43 C
202215.0 C-0.33 C
202315.5 C+0.13 C
202416.3 C+0.96 C
202515.4 C+0.04 C

The fitted trend in annual mean temperature here over 1994 to 2025 is -0.04 C (-0.28 to 0.19) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.5 to 0.3) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Sanford Dam
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.04 C (-0.28 to 0.19) per decade-0.1 F (-0.5 to 0.3) per decade1994 to 202531Not clearly different from zero
Mean daily maximum0.4 C (0.1 to 0.8) per decade0.7 F (0.1 to 1.4) per decade1994 to 202531Rise
Mean daily minimum-0.5 C (-0.8 to -0.2) per decade-0.9 F (-1.4 to -0.3) per decade1994 to 202531Fall

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

1993 to 2026
Yearly extremes at Sanford Dam: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)45.6 C (114.1 F)202042.2 C (108.0 F)34
Coldest night (TNn)-22.2 C (-8.0 F)2021-15.6 C (3.9 F)34
Wettest day (Rx1day)115.8 mm (4.6 in)202649.9 mm (2.0 in)34
Wettest five days (Rx5day)146.2 mm (5.8 in)201580.7 mm (3.2 in)34
Longest dry spell (CDD)85 days201842 days34

Hottest day (TXx)

Hottest day (TXx) at Sanford Dam by year The hottest day of the year at Sanford Dam, 1993 to 2026. The record is 45.6 C (114.1 F) in 2020, marked on the chart; the median year is 42.2 C (108.0 F). 3035404550200020102020Record: 45.6 C (114.1 F) in 2020
The hottest day of the year at Sanford Dam, 1993 to 2026. The record is 45.6 C (114.1 F) in 2020, marked on the chart; the median year is 42.2 C (108.0 F).
Hottest day (TXx) at Sanford Dam by year
YearHottest day (TXx)
199333.3 C (91.9 F)
199442.2 C (108.0 F)
199540.0 C (104.0 F)
199641.7 C (107.1 F)
199740.6 C (105.1 F)
199842.8 C (109.0 F)
199940.6 C (105.1 F)
200043.9 C (111.0 F)
200141.7 C (107.1 F)
200238.9 C (102.0 F)
200342.2 C (108.0 F)
200438.9 C (102.0 F)
200539.4 C (102.9 F)
200642.2 C (108.0 F)
200740.6 C (105.1 F)
200843.3 C (109.9 F)
200943.3 C (109.9 F)
201041.1 C (106.0 F)
201145.0 C (113.0 F)
201241.7 C (107.1 F)
201341.1 C (106.0 F)
201440.0 C (104.0 F)
201537.8 C (100.0 F)
201642.8 C (109.0 F)
201743.3 C (109.9 F)
201843.9 C (111.0 F)
201942.8 C (109.0 F)
202045.6 C (114.1 F)
202142.2 C (108.0 F)
202244.4 C (111.9 F)
202343.3 C (109.9 F)
202442.2 C (108.0 F)
202541.1 C (106.0 F)
202643.3 C (109.9 F)

Coldest night (TNn)

Coldest night (TNn) at Sanford Dam by year The coldest night of the year at Sanford Dam, 1993 to 2026. The record is -22.2 C (-8.0 F) in 2021, marked on the chart; the median year is -15.6 C (3.9 F). -25-20-15-10-5200020102020Record: -22.2 C (-8.0 F) in 2021
The coldest night of the year at Sanford Dam, 1993 to 2026. The record is -22.2 C (-8.0 F) in 2021, marked on the chart; the median year is -15.6 C (3.9 F).
Coldest night (TNn) at Sanford Dam by year
YearColdest night (TNn)
1993-11.7 C (10.9 F)
1994-14.4 C (6.1 F)
1995-12.2 C (10.0 F)
1996-17.2 C (1.0 F)
1997-14.4 C (6.1 F)
1998-15.6 C (3.9 F)
1999-8.3 C (17.1 F)
2000-12.2 C (10.0 F)
2001-12.8 C (9.0 F)
2002-15.0 C (5.0 F)
2003-16.7 C (1.9 F)
2004-19.4 C (-2.9 F)
2005-17.8 C (0.0 F)
2006-15.6 C (3.9 F)
2007-15.6 C (3.9 F)
2008-13.3 C (8.1 F)
2009-17.2 C (1.0 F)
2010-16.7 C (1.9 F)
2011-18.9 C (-2.0 F)
2012-13.3 C (8.1 F)
2013-13.3 C (8.1 F)
2014-15.6 C (3.9 F)
2015-14.4 C (6.1 F)
2016-18.9 C (-2.0 F)
2017-16.7 C (1.9 F)
2018-17.8 C (0.0 F)
2019-14.4 C (6.1 F)
2020-11.1 C (12.0 F)
2021-22.2 C (-8.0 F)
2022-20.0 C (-4.0 F)
2023-14.4 C (6.1 F)
2024-16.7 C (1.9 F)
2025-18.9 C (-2.0 F)
2026-20.0 C (-4.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Sanford Dam by year The wettest day of the year at Sanford Dam, 1993 to 2026. The record is 115.8 mm (4.6 in) in 2026, marked on the chart; the median year is 49.9 mm (2.0 in). 050100150200020102020Record: 115.8 mm (4.6 in) in 2026
The wettest day of the year at Sanford Dam, 1993 to 2026. The record is 115.8 mm (4.6 in) in 2026, marked on the chart; the median year is 49.9 mm (2.0 in).
Wettest day (Rx1day) at Sanford Dam by year
YearWettest day (Rx1day)
199313.2 mm (0.5 in)
199450.0 mm (2.0 in)
199556.4 mm (2.2 in)
199646.2 mm (1.8 in)
199742.7 mm (1.7 in)
199869.9 mm (2.8 in)
199953.3 mm (2.1 in)
200053.3 mm (2.1 in)
200122.9 mm (0.9 in)
200242.9 mm (1.7 in)
200343.4 mm (1.7 in)
200491.4 mm (3.6 in)
200545.7 mm (1.8 in)
200647.0 mm (1.9 in)
200750.8 mm (2.0 in)
200888.9 mm (3.5 in)
200947.8 mm (1.9 in)
201048.3 mm (1.9 in)
201131.7 mm (1.2 in)
201273.2 mm (2.9 in)
201346.5 mm (1.8 in)
201429.2 mm (1.1 in)
2015107.4 mm (4.2 in)
201643.2 mm (1.7 in)
201756.4 mm (2.2 in)
201853.3 mm (2.1 in)
201971.1 mm (2.8 in)
202028.7 mm (1.1 in)
202171.6 mm (2.8 in)
202228.7 mm (1.1 in)
202349.8 mm (2.0 in)
202452.3 mm (2.1 in)
202592.7 mm (3.6 in)
2026115.8 mm (4.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Sanford Dam by year The wettest five days of the year at Sanford Dam, 1993 to 2026. The record is 146.2 mm (5.8 in) in 2015, marked on the chart; the median year is 80.7 mm (3.2 in). 050100150200020102020Record: 146.2 mm (5.8 in) in 2015
The wettest five days of the year at Sanford Dam, 1993 to 2026. The record is 146.2 mm (5.8 in) in 2015, marked on the chart; the median year is 80.7 mm (3.2 in).
Wettest five days (Rx5day) at Sanford Dam by year
YearWettest five days (Rx5day)
199316.5 mm (0.6 in)
199451.0 mm (2.0 in)
199576.3 mm (3.0 in)
199696.0 mm (3.8 in)
1997103.9 mm (4.1 in)
1998107.8 mm (4.2 in)
199999.4 mm (3.9 in)
200072.6 mm (2.9 in)
200137.9 mm (1.5 in)
200265.0 mm (2.6 in)
200394.7 mm (3.7 in)
200497.8 mm (3.9 in)
200593.5 mm (3.7 in)
200661.7 mm (2.4 in)
200773.6 mm (2.9 in)
2008105.1 mm (4.1 in)
200954.2 mm (2.1 in)
201076.4 mm (3.0 in)
201149.5 mm (1.9 in)
201284.7 mm (3.3 in)
201364.5 mm (2.5 in)
201444.0 mm (1.7 in)
2015146.2 mm (5.8 in)
201677.3 mm (3.0 in)
201791.0 mm (3.6 in)
201897.3 mm (3.8 in)
2019108.2 mm (4.3 in)
202047.8 mm (1.9 in)
2021116.5 mm (4.6 in)
202242.0 mm (1.7 in)
202384.1 mm (3.3 in)
202471.9 mm (2.8 in)
202593.2 mm (3.7 in)
2026121.1 mm (4.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Sanford Dam by year The longest dry spell of the year at Sanford Dam, 1993 to 2026. The record is 85 days in 2018, marked on the chart; the median year is 42 days. 20406080100200020102020Record: 85 days in 2018
The longest dry spell of the year at Sanford Dam, 1993 to 2026. The record is 85 days in 2018, marked on the chart; the median year is 42 days.
Longest dry spell (CDD) at Sanford Dam by year
YearLongest dry spell (CDD)
199326 days
199432 days
199539 days
199655 days
199735 days
199834 days
199936 days
200060 days
200144 days
200241 days
200359 days
200433 days
200538 days
200677 days
200745 days
200846 days
200962 days
201033 days
201153 days
201262 days
201339 days
201433 days
201523 days
201631 days
201753 days
201885 days
201945 days
202046 days
202179 days
202246 days
202339 days
202442 days
202537 days
202637 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

31 years with a frost

Across 31 years with a frost, the median last spring frost at Sanford Dam falls on 11 April and the median first autumn frost on 28 October, which leaves a median of 202 days between them.

Fitted over all years, the growing season changes by -5.0 days per decade at this station.

Frost dates and growing season at Sanford Dam
MeasureMedian, all yearsEarliest periodRecent period (1995 to 2025)Recent against earliestFitted trend
Last spring frost11 Apriln/a12 Apriln/a+2.1 days per decade
First autumn frost28 Octobern/a28 Octobern/a-2.8 days per decade
Growing days202 daysn/a201 daysn/a-5.0 days per decade

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

32 years, 1994 to 2025

A day with at least 50.3 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 122.7 mm (4.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Sanford Dam: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years50.3 mm (2.0 in)
5 years68.0 mm (2.7 in)
10 years80.4 mm (3.2 in)
25 years96.8 mm (3.8 in)
50 years109.5 mm (4.3 in)Longer than the 32 years of record
100 years122.7 mm (4.8 in)Longer than the 32 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, 32 years of values from 1994 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: 107.4 mm (4.2 in) in 2015; 92.7 mm (3.6 in) in 2025; 91.4 mm (3.6 in) in 2004.

Download the Data

  • Data for Sanford Dam standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Sanford Dam 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 (2026-10-14).