Daily records
Page built 2026-10-17
Data as of 2025-12-31
Search
Built 2026-10-17 (17 October 2026)

Ashton 2S Weather Records (USC00390350)

Record envelope, standing records and threshold days for Ashton 2S (USC00390350), South Dakota, United States, with 39 years of record.

Key Facts for Ashton 2S

  • Ashton 2S (USC00390350) is a weather station in South Dakota, United States at 44.96 latitude and -98.51 longitude, 390 m (1,280 ft) above sea level.
  • The station reports from 1969 to 2007, 39 years of record.
  • 0 records set at Ashton 2S still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Ashton 2S set a daily record snowfall of 12.7 cm (5.0 in) on 31 December 2006.

About the Station

  • Location: South Dakota, United States, 44.96 latitude, -98.51 longitude.
  • Elevation: 390 m (1,280 ft).
  • Period of record: 1969 to 2007, 39 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 Ashton 2S, with 2026 drawn through them The band shows the record high and record low for each calendar day at Ashton 2S. 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 Ashton 2S. 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 Ashton 2S, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jann/an/an/an/a
Febn/an/an/an/a
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 Ashton 2S by the year they were set 0 records at Ashton 2S still stand. 00000000000
0 records at Ashton 2S still stand.
Standing records at Ashton 2S by the year they were set
Year setStanding records

Wettest Day of Each Month

Sep: 104.1 mm (4.1 in)
Record daily precipitation for each month at Ashton 2S The wettest day on record for each calendar month at Ashton 2S. The most was 104.1 mm (4.1 in) on 15 September 1997. 050100150 Jan: 17.3 mm (0.7 in), 4 January 1997 Jan Feb: 30.2 mm (1.2 in), 24 February 1977 Feb Mar: 40.6 mm (1.6 in), 18 March 1987 Mar Apr: 43.2 mm (1.7 in), 12 April 1970 Apr May: 58.4 mm (2.3 in), 9 May 1986 May Jun: 93.2 mm (3.7 in), 12 June 2005 Jun Jul: 91.4 mm (3.6 in), 25 July 1993 Jul Aug: 72.9 mm (2.9 in), 5 August 2000 Aug Sep: 104.1 mm (4.1 in), 15 September 1997 Sep Oct: 62.5 mm (2.5 in), 17 October 1998 Oct Nov: 29.2 mm (1.1 in), 9 November 1977 Nov Dec: 18.3 mm (0.7 in), 15 December 1996 Dec
The wettest day on record for each calendar month at Ashton 2S. The most was 104.1 mm (4.1 in) on 15 September 1997.
Record daily precipitation for each month at Ashton 2S
MonthRecord daily precipitation (mm)Date
Jan17.3 mm (0.7 in)4 January 1997
Feb30.2 mm (1.2 in)24 February 1977
Mar40.6 mm (1.6 in)18 March 1987
Apr43.2 mm (1.7 in)12 April 1970
May58.4 mm (2.3 in)9 May 1986
Jun93.2 mm (3.7 in)12 June 2005
Jul91.4 mm (3.6 in)25 July 1993
Aug72.9 mm (2.9 in)5 August 2000
Sep104.1 mm (4.1 in)15 September 1997
Oct62.5 mm (2.5 in)17 October 1998
Nov29.2 mm (1.1 in)9 November 1977
Dec18.3 mm (0.7 in)15 December 1996

Latest Records

20
Latest records at Ashton 2S
DateStationRecordValueBeat old record byOld record stoodSignificance
31 December 2006Ashton 2S, USdaily snowfall12.7 cm (5.0 in)10.2 cm (4.0 in)36 years39 of 100 (Notable)
30 December 2006Ashton 2S, USdaily snowfall10.2 cm (4.0 in)5.1 cm (2.0 in)24 years22 of 100 (Routine)
30 December 2006Ashton 2S, USdaily rain7.4 mm (0.29 in)2.8 mm (0.11 in)24 years18 of 100 (Routine)
29 December 2006Ashton 2S, USdaily snowfall5.1 cm (2.0 in)2.6 cm (1.0 in)24 years16 of 100 (Routine)
21 December 2006Ashton 2S, USdaily rain7.4 mm (0.29 in)0.5 mm (0.02 in)23 years10 of 100 (Routine)
2 September 2006Ashton 2S, USdaily rain30.5 mm (1.2 in)7.1 mm (0.28 in)20 years15 of 100 (Routine)
13 August 2006Ashton 2S, USdaily rain22.9 mm (0.9 in)0.8 mm (0.03 in)25 years10 of 100 (Routine)
24 May 2006Ashton 2S, USdaily rain41.4 mm (1.6 in)19.3 mm (0.8 in)8 years26 of 100 (Routine)
13 March 2006Ashton 2S, USdaily snowfall2.5 cm (1.0 in)0.7 cm (0.3 in)21 years10 of 100 (Routine)
11 March 2006Ashton 2S, USdaily snowfall10.2 cm (4.0 in)10.2 cm (4.0 in)32 years31 of 100 (Routine)
23 February 2006Ashton 2S, USdaily snowfall1.3 cm (0.5 in)0.3 cm (0.1 in)20 years9 of 100 (Routine)
11 February 2006Ashton 2S, USdaily rain4.3 mm (0.17 in)0.5 mm (0.02 in)31 years13 of 100 (Routine)
11 February 2006Ashton 2S, USdaily snowfall (Tie)3.8 cm (1.5 in)tie23 years2 of 100 (Routine)
7 December 2005Ashton 2S, USdaily rain1.5 mm (0.06 in)0.2 mm (0.01 in)34 years13 of 100 (Routine)
28 November 2005Ashton 2S, USmonthly snowfall15.2 cm (6.0 in)2.5 cm (1.0 in)13 years24 of 100 (Routine)
28 November 2005Ashton 2S, USdaily rain19.1 mm (0.8 in)7.4 mm (0.29 in)4 years20 of 100 (Routine)
27 November 2005Ashton 2S, USdaily rain19.1 mm (0.8 in)5.4 mm (0.21 in)16 years19 of 100 (Routine)
19 November 2005Ashton 2S, USdaily rain6.4 mm (0.25 in)1.1 mm (0.04 in)20 years11 of 100 (Routine)
6 September 2005Ashton 2S, USdaily rain9.1 mm (0.36 in)0.5 mm (0.02 in)10 years6 of 100 (Routine)
22 June 2005Ashton 2S, USdaily rain47.2 mm (1.9 in)21.3 mm (0.8 in)2 years20 of 100 (Routine)

Extremes by Year

1969 to 2007
Yearly extremes at Ashton 2S: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)104.1 mm (4.1 in)199743.2 mm (1.7 in)39
Wettest five days (Rx5day)136.7 mm (5.4 in)200572.7 mm (2.9 in)39
Longest dry spell (CDD)79 days199736 days39

Wettest day (Rx1day)

Wettest day (Rx1day) at Ashton 2S by year The wettest day of the year at Ashton 2S, 1969 to 2007. The record is 104.1 mm (4.1 in) in 1997, marked on the chart; the median year is 43.2 mm (1.7 in). 02550751001251970198019902000Record: 104.1 mm (4.1 in) in 1997
The wettest day of the year at Ashton 2S, 1969 to 2007. The record is 104.1 mm (4.1 in) in 1997, marked on the chart; the median year is 43.2 mm (1.7 in).
Wettest day (Rx1day) at Ashton 2S by year
YearWettest day (Rx1day)
196932.3 mm (1.3 in)
197043.2 mm (1.7 in)
197141.1 mm (1.6 in)
197246.7 mm (1.8 in)
197336.8 mm (1.4 in)
197433.0 mm (1.3 in)
197530.0 mm (1.2 in)
197641.7 mm (1.6 in)
197754.6 mm (2.1 in)
197837.8 mm (1.5 in)
197942.4 mm (1.7 in)
198032.3 mm (1.3 in)
198126.7 mm (1.1 in)
198245.2 mm (1.8 in)
198361.0 mm (2.4 in)
198461.0 mm (2.4 in)
198537.6 mm (1.5 in)
198658.4 mm (2.3 in)
198740.6 mm (1.6 in)
198838.6 mm (1.5 in)
198951.1 mm (2.0 in)
199071.6 mm (2.8 in)
199163.0 mm (2.5 in)
199284.6 mm (3.3 in)
199391.4 mm (3.6 in)
199464.5 mm (2.5 in)
199541.1 mm (1.6 in)
199651.3 mm (2.0 in)
1997104.1 mm (4.1 in)
199862.5 mm (2.5 in)
199967.3 mm (2.6 in)
200072.9 mm (2.9 in)
200142.4 mm (1.7 in)
200280.5 mm (3.2 in)
200337.3 mm (1.5 in)
200441.4 mm (1.6 in)
200593.2 mm (3.7 in)
200641.4 mm (1.6 in)
20075.1 mm (0.20 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Ashton 2S by year The wettest five days of the year at Ashton 2S, 1969 to 2007. The record is 136.7 mm (5.4 in) in 2005, marked on the chart; the median year is 72.7 mm (2.9 in). 0501001501970198019902000Record: 136.7 mm (5.4 in) in 2005
The wettest five days of the year at Ashton 2S, 1969 to 2007. The record is 136.7 mm (5.4 in) in 2005, marked on the chart; the median year is 72.7 mm (2.9 in).
Wettest five days (Rx5day) at Ashton 2S by year
YearWettest five days (Rx5day)
196953.1 mm (2.1 in)
197083.1 mm (3.3 in)
197148.8 mm (1.9 in)
197272.8 mm (2.9 in)
197345.8 mm (1.8 in)
197451.0 mm (2.0 in)
197562.3 mm (2.5 in)
197641.7 mm (1.6 in)
197782.3 mm (3.2 in)
197871.3 mm (2.8 in)
197957.2 mm (2.3 in)
198071.1 mm (2.8 in)
198148.0 mm (1.9 in)
198287.4 mm (3.4 in)
198365.3 mm (2.6 in)
198494.8 mm (3.7 in)
198550.0 mm (2.0 in)
198672.7 mm (2.9 in)
198768.6 mm (2.7 in)
198880.5 mm (3.2 in)
198969.4 mm (2.7 in)
1990108.5 mm (4.3 in)
199189.4 mm (3.5 in)
1992113.3 mm (4.5 in)
1993107.1 mm (4.2 in)
1994109.9 mm (4.3 in)
199580.7 mm (3.2 in)
199692.9 mm (3.7 in)
1997107.9 mm (4.2 in)
199870.4 mm (2.8 in)
1999108.2 mm (4.3 in)
200083.6 mm (3.3 in)
200151.5 mm (2.0 in)
200291.7 mm (3.6 in)
200384.8 mm (3.3 in)
200446.2 mm (1.8 in)
2005136.7 mm (5.4 in)
200641.4 mm (1.6 in)
200713.7 mm (0.5 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Ashton 2S by year The longest dry spell of the year at Ashton 2S, 1969 to 2007. The record is 79 days in 1997, marked on the chart; the median year is 36 days. 0204060801970198019902000Record: 79 days in 1997
The longest dry spell of the year at Ashton 2S, 1969 to 2007. The record is 79 days in 1997, marked on the chart; the median year is 36 days.
Longest dry spell (CDD) at Ashton 2S by year
YearLongest dry spell (CDD)
196917 days
197033 days
197160 days
197228 days
197321 days
197442 days
197526 days
197639 days
197734 days
197836 days
197960 days
198048 days
198155 days
198241 days
198328 days
198426 days
198536 days
198643 days
198740 days
198827 days
198926 days
199042 days
199148 days
199244 days
199328 days
199428 days
199528 days
199630 days
199779 days
199843 days
199962 days
200042 days
200133 days
200251 days
200339 days
200432 days
200532 days
200670 days
200727 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

34 years, 1970 to 2006

A day with at least 47.7 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 128.2 mm (5.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Ashton 2S: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years47.7 mm (1.9 in)
5 years64.4 mm (2.5 in)
10 years77.1 mm (3.0 in)
25 years95.5 mm (3.8 in)
50 years111.0 mm (4.4 in)Longer than the 34 years of record
100 years128.2 mm (5.0 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 1970 to 2006.

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: 104.1 mm (4.1 in) in 1997; 93.2 mm (3.7 in) in 2005; 91.4 mm (3.6 in) in 1993.

Download the Data

  • Data for Ashton 2S standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Ashton 2S 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 (2025-12-31).