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Theilman 1SSW Weather Records (USC00218227)

Record envelope, standing records and threshold days for Theilman 1SSW (USC00218227), Minnesota, United States, with 89 years of record.

Key Facts for Theilman 1SSW

  • Theilman 1SSW (USC00218227) is a weather station in Minnesota, United States at 44.28 latitude and -92.19 longitude, 230 m (753 ft) above sea level.
  • The station reports from 1938 to 2026, 89 years of record.
  • 1,464 records set at Theilman 1SSW still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Theilman 1SSW tied a daily record high maximum temperature of 30.6 C (87.1 F) on 13 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Minnesota, United States, 44.28 latitude, -92.19 longitude.
  • Elevation: 230 m (753 ft).
  • Period of record: 1938 to 2026, 89 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

15 days at or beyond a record
Daily record high and record low at Theilman 1SSW, with 2026 drawn through them The band shows the record high and record low for each calendar day at Theilman 1SSW. The lines show the 2026 daily maximum and minimum. 15 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -60-40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Theilman 1SSW. The lines show the 2026 daily maximum and minimum. 15 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Theilman 1SSW, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan13.9 C (57.0 F)-42.2 C (-44.0 F)7.8 C (46.0 F)-32.8 C (-27.0 F)
Feb21.1 C (70.0 F)-40.0 C (-40.0 F)12.2 C (54.0 F)-21.1 C (-6.0 F)
Mar28.9 C (84.0 F)-33.3 C (-27.9 F)26.1 C (79.0 F)-25.0 C (-13.0 F)
Apr35.0 C (95.0 F)-18.3 C (-0.9 F)27.2 C (81.0 F)-9.4 C (15.1 F)
May37.2 C (99.0 F)-9.4 C (15.1 F)32.2 C (90.0 F)-3.9 C (25.0 F)
Jun39.4 C (102.9 F)0.0 C (32.0 F)33.9 C (93.0 F)5.6 C (42.1 F)
Jul39.4 C (102.9 F)3.9 C (39.0 F)35.6 C (96.1 F)7.8 C (46.0 F)
Aug40.0 C (104.0 F)0.0 C (32.0 F)31.1 C (88.0 F)7.2 C (45.0 F)
Sep37.2 C (99.0 F)-5.6 C (21.9 F)34.4 C (93.9 F)3.3 C (37.9 F)
Oct34.4 C (93.9 F)-13.9 C (7.0 F)31.7 C (89.1 F)0.6 C (33.1 F)
Nov26.1 C (79.0 F)-27.2 C (-17.0 F)n/an/a
Dec17.8 C (64.0 F)-38.9 C (-38.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Theilman 1SSW by the year they were set 1,464 records at Theilman 1SSW still stand. 1991 holds the most, with 51. 02040601962: 151963: 261964: 301965: 421966: 341967: 341968: 261969: 191970: 201971: 251972: 431973: 191974: 221975: 131976: 221977: 191978: 161979: 211980: 111981: 261982: 191983: 401984: 161985: 291986: 181987: 221988: 371989: 311990: 211991: 511992: 331993: 111994: 171995: 41996: 141997: 181998: 51999: 62000: 292001: 62002: 42003: 202004: 142005: 182006: 222007: 182008: 172009: 292010: 152011: 182012: 332013: 202014: 312015: 202016: 182017: 332018: 322019: 202020: 292021: 332022: 212023: 252024: 262025: 242026: 141962196919761983199019972004201120182025
1,464 records at Theilman 1SSW still stand. 1991 holds the most, with 51.
Standing records at Theilman 1SSW by the year they were set
Year setStanding records
196215
196326
196430
196542
196634
196734
196826
196919
197020
197125
197243
197319
197422
197513
197622
197719
197816
197921
198011
198126
198219
198340
198416
198529
198618
198722
198837
198931
199021
199151
199233
199311
199417
19954
199614
199718
19985
19996
200029
20016
20024
200320
200414
200518
200622
200718
200817
200929
201015
201118
201233
201320
201431
201520
201618
201733
201832
201920
202029
202133
202221
202325
202426
202524
202614

All-Time Record Progression

2 new records
When Theilman 1SSW set new all-time records 2 all-time records were set at Theilman 1SSW between 1 July 1978 and 2 March 2019. Each dot is a new record. Record daily precipitationRecord snow depth1 July 1978: Record daily precipitation 203.2 mm (8.0 in)2 March 2019: Record snow depth 78.7 cm (31.0 in)19801990200020102020
2 all-time records were set at Theilman 1SSW between 1 July 1978 and 2 March 2019. Each dot is a new record.
When Theilman 1SSW set new all-time records
DateKindDetail
1978-07-01Record daily precipitationRecord daily precipitation 203.2 mm (8.0 in)
2019-03-02Record snow depthRecord snow depth 78.7 cm (31.0 in)

Wettest Day of Each Month

Jul: 203.2 mm (8.0 in)
Record daily precipitation for each month at Theilman 1SSW The wettest day on record for each calendar month at Theilman 1SSW. The most was 203.2 mm (8.0 in) on 1 July 1978. 0100200300 Jan: 42.9 mm (1.7 in), 20 January 1988 Jan Feb: 39.9 mm (1.6 in), 29 February 2012 Feb Mar: 45.2 mm (1.8 in), 4 March 1989 Mar Apr: 66.0 mm (2.6 in), 12 April 2001 Apr May: 63.5 mm (2.5 in), 29 May 1981 May Jun: 129.5 mm (5.1 in), 13 June 1950 Jun Jul: 203.2 mm (8.0 in), 1 July 1978 Jul Aug: 196.9 mm (7.8 in), 11 August 2016 Aug Sep: 158.8 mm (6.3 in), 23 September 2010 Sep Oct: 138.7 mm (5.5 in), 15 October 1966 Oct Nov: 62.2 mm (2.4 in), 10 November 1975 Nov Dec: 35.1 mm (1.4 in), 27 December 1982 Dec
The wettest day on record for each calendar month at Theilman 1SSW. The most was 203.2 mm (8.0 in) on 1 July 1978.
Record daily precipitation for each month at Theilman 1SSW
MonthRecord daily precipitation (mm)Date
Jan42.9 mm (1.7 in)20 January 1988
Feb39.9 mm (1.6 in)29 February 2012
Mar45.2 mm (1.8 in)4 March 1989
Apr66.0 mm (2.6 in)12 April 2001
May63.5 mm (2.5 in)29 May 1981
Jun129.5 mm (5.1 in)13 June 1950
Jul203.2 mm (8.0 in)1 July 1978
Aug196.9 mm (7.8 in)11 August 2016
Sep158.8 mm (6.3 in)23 September 2010
Oct138.7 mm (5.5 in)15 October 1966
Nov62.2 mm (2.4 in)10 November 1975
Dec35.1 mm (1.4 in)27 December 1982

Period of Record Coverage

1962 to 2026
Days with data per year at Theilman 1SSW 65 years of record at Theilman 1SSW, 1962 to 2026. 22 years have data for under 90 percent of days and are left out of rankings: 1962, 1964, 1965, 1982, 1983, 1984, 1985, 1986 and others. 1962: 211 of 365 days1963: 358 of 365 days1964: 318 of 366 days1965: 328 of 365 days1966: 362 of 365 days1967: 357 of 365 days1968: 362 of 366 days1969: 363 of 365 days1970: 364 of 365 days1971: 363 of 365 days1972: 366 of 366 days1973: 333 of 365 days1974: 365 of 365 days1975: 362 of 365 days1976: 362 of 366 days1977: 338 of 365 days1978: 333 of 365 days1979: 334 of 365 days1980: 357 of 366 days1981: 356 of 365 days1982: 267 of 365 days1983: 327 of 365 days1984: 299 of 366 days1985: 288 of 365 days1986: 288 of 365 days1987: 291 of 365 days1988: 285 of 366 days1989: 317 of 365 days1990: 354 of 365 days1991: 358 of 365 days1992: 333 of 366 days1993: 257 of 365 days1994: 266 of 365 days1995: 103 of 365 days1996: 212 of 366 days1997: 359 of 365 days1998: 207 of 365 days1999: 65 of 365 days2000: 366 of 366 days2001: 108 of 365 days2002: 120 of 365 days2003: 355 of 365 days2004: 360 of 366 days2005: 357 of 365 days2006: 359 of 365 days2007: 364 of 365 days2008: 365 of 366 days2009: 360 of 365 days2010: 360 of 365 days2011: 361 of 365 days2012: 357 of 366 days2013: 363 of 365 days2014: 363 of 365 days2015: 361 of 365 days2016: 364 of 366 days2017: 361 of 365 days2018: 365 of 365 days2019: 364 of 365 days2020: 366 of 366 days2021: 364 of 365 days2022: 365 of 365 days2023: 301 of 365 days2024: 324 of 366 days2025: 338 of 365 days2026: 285 of 365 days197019801990200020102020
65 years of record at Theilman 1SSW, 1962 to 2026. 22 years have data for under 90 percent of days and are left out of rankings: 1962, 1964, 1965, 1982, 1983, 1984, 1985, 1986 and others.
Days with data per year at Theilman 1SSW
YearDays with dataShare of yearComplete
196221158%No
196335898%Yes
196431887%No
196532890%No
196636299%Yes
196735798%Yes
196836299%Yes
196936399%Yes
1970364100%Yes
197136399%Yes
1972366100%Yes
197333391%Yes
1974365100%Yes
197536299%Yes
197636299%Yes
197733893%Yes
197833391%Yes
197933492%Yes
198035798%Yes
198135698%Yes
198226773%No
198332790%No
198429982%No
198528879%No
198628879%No
198729180%No
198828578%No
198931787%No
199035497%Yes
199135898%Yes
199233391%Yes
199325770%No
199426673%No
199510328%No
199621258%No
199735998%Yes
199820757%No
19996518%No
2000366100%Yes
200110830%No
200212033%No
200335597%Yes
200436098%Yes
200535798%Yes
200635998%Yes
2007364100%Yes
2008365100%Yes
200936099%Yes
201036099%Yes
201136199%Yes
201235798%Yes
201336399%Yes
201436399%Yes
201536199%Yes
201636499%Yes
201736199%Yes
2018365100%Yes
2019364100%Yes
2020366100%Yes
2021364100%Yes
2022365100%Yes
202330182%No
202432489%No
202533893%Yes
202628578%No

Latest Records

20
Latest records at Theilman 1SSW
DateStationRecordValueBeat old record byOld record stoodSignificance
13 October 2026Theilman 1SSW, USdaily high max (Tie, Provisional)30.6 C (87.1 F)tie51 years5 of 100 (Routine)
12 October 2026Theilman 1SSW, USdaily high max (Provisional)31.7 C (89.1 F)2.3 C (4.1 F)11 years12 of 100 (Routine)
11 October 2026Theilman 1SSW, USdaily high max (Provisional)31.1 C (88.0 F)3.3 C (5.9 F)64 years30 of 100 (Routine)
5 September 2026Theilman 1SSW, USdaily high max (Provisional)34.4 C (93.9 F)0.5 C (0.9 F)13 years10 of 100 (Routine)
1 August 2026Theilman 1SSW, USdaily low max21.1 C (70.0 F)1.7 C (3.1 F)29 years18 of 100 (Routine)
28 July 2026Theilman 1SSW, USdaily high max (Tie)35.6 C (96.1 F)tie37 years4 of 100 (Routine)
27 July 2026Theilman 1SSW, USdaily high min (Tie)21.7 C (71.1 F)tie19 years2 of 100 (Routine)
10 June 2026Theilman 1SSW, USdaily high min21.1 C (70.0 F)0.5 C (0.9 F)13 years11 of 100 (Routine)
16 May 2026Theilman 1SSW, USdaily high max31.7 C (89.1 F)1.1 C (2.0 F)39 years18 of 100 (Routine)
7 May 2026Theilman 1SSW, USdaily low max7.8 C (46.0 F)5.0 C (9.0 F)52 years29 of 100 (Routine)
7 May 2026Theilman 1SSW, USdaily low min-3.9 C (25.0 F)0.6 C (1.1 F)36 years18 of 100 (Routine)
23 April 2026Theilman 1SSW, USdaily high max27.2 C (81.0 F)0.5 C (0.9 F)45 years19 of 100 (Routine)
31 March 2026Theilman 1SSW, USdaily high max26.1 C (79.0 F)0.5 C (0.9 F)59 years23 of 100 (Routine)
22 March 2026Theilman 1SSW, USdaily high max25.6 C (78.1 F)4.5 C (8.1 F)32 years21 of 100 (Routine)
18 March 2026Theilman 1SSW, USdaily low min-25.0 C (-13.0 F)0.6 C (1.1 F)36 years17 of 100 (Routine)
17 March 2026Theilman 1SSW, USdaily low max-10.0 C (14.0 F)1.1 C (2.0 F)36 years18 of 100 (Routine)
17 March 2026Theilman 1SSW, USdaily low min-25.0 C (-13.0 F)2.2 C (4.0 F)28 years17 of 100 (Routine)
16 March 2026Theilman 1SSW, USdaily snowfall13.0 cm (5.1 in)2.1 cm (0.8 in)20 years17 of 100 (Routine)
15 March 2026Theilman 1SSW, USdaily rain28.4 mm (1.1 in)7.8 mm (0.31 in)36 years29 of 100 (Routine)
15 March 2026Theilman 1SSW, USmonthly snowfall (Tie)33.5 cm (13.2 in)tie20 years6 of 100 (Routine)

Climate Trend

42 complete years, 1963 to 2022
Annual mean temperature at Theilman 1SSW as warming stripes, 1963 to 2022 One stripe for each of 42 complete years at Theilman 1SSW, 1963 to 2022. Blue stripes are years cooler than the station's own mean of 7.2 C (44.9 F); red stripes are warmer. The coolest year was 2008, at 4.6 C (40.4 F), and the warmest was 1987, at 9.3 C (48.8 F). The strongest colour marks a difference of 2.6 C (4.7 F). 1963: 6.8 C, -0.3 C from the station mean1966: 6.4 C, -0.8 C from the station mean1967: 6.4 C, -0.7 C from the station mean1968: 7.5 C, +0.3 C from the station mean1969: 6.9 C, -0.3 C from the station mean1970: 6.7 C, -0.4 C from the station mean1971: 6.6 C, -0.6 C from the station mean1972: 5.0 C, -2.2 C from the station mean1974: 7.0 C, -0.2 C from the station mean1975: 7.1 C, 0.0 C from the station mean1976: 7.5 C, +0.4 C from the station mean1980: 8.5 C, +1.3 C from the station mean1981: 9.2 C, +2.0 C from the station mean1983: 7.3 C, +0.1 C from the station mean1984: 7.3 C, +0.1 C from the station mean1985: 6.8 C, -0.4 C from the station mean1987: 9.3 C, +2.2 C from the station mean1990: 8.1 C, +0.9 C from the station mean1991: 8.5 C, +1.4 C from the station mean1992: 8.0 C, +0.8 C from the station mean1997: 6.3 C, -0.8 C from the station mean2000: 6.6 C, -0.6 C from the station mean2003: 6.8 C, -0.3 C from the station mean2004: 7.0 C, -0.2 C from the station mean2005: 7.7 C, +0.6 C from the station mean2006: 8.3 C, +1.1 C from the station mean2007: 7.4 C, +0.3 C from the station mean2008: 4.6 C, -2.5 C from the station mean2009: 5.7 C, -1.5 C from the station mean2010: 7.2 C, 0.0 C from the station mean2011: 7.1 C, -0.1 C from the station mean2012: 9.0 C, +1.8 C from the station mean2013: 5.8 C, -1.4 C from the station mean2014: 5.0 C, -2.1 C from the station mean2015: 7.5 C, +0.4 C from the station mean2016: 8.3 C, +1.1 C from the station mean2017: 7.8 C, +0.7 C from the station mean2018: 6.6 C, -0.5 C from the station mean2019: 6.4 C, -0.8 C from the station mean2020: 7.9 C, +0.7 C from the station mean2021: 8.3 C, +1.2 C from the station mean2022: 6.7 C, -0.4 C from the station mean196319701975198019851990199520002005201020152020
One stripe for each of 42 complete years at Theilman 1SSW, 1963 to 2022. Blue stripes are years cooler than the station's own mean of 7.2 C (44.9 F); red stripes are warmer. The coolest year was 2008, at 4.6 C (40.4 F), and the warmest was 1987, at 9.3 C (48.8 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Theilman 1SSW as warming stripes, 1963 to 2022
YearAnnual mean temperatureDifference from the station mean
19636.8 C-0.33 C
19666.4 C-0.80 C
19676.4 C-0.72 C
19687.5 C+0.31 C
19696.9 C-0.30 C
19706.7 C-0.43 C
19716.6 C-0.57 C
19725.0 C-2.19 C
19747.0 C-0.19 C
19757.1 C-0.01 C
19767.5 C+0.38 C
19808.5 C+1.34 C
19819.2 C+2.00 C
19837.3 C+0.12 C
19847.3 C+0.12 C
19856.8 C-0.39 C
19879.3 C+2.16 C
19908.1 C+0.90 C
19918.5 C+1.37 C
19928.0 C+0.81 C
19976.3 C-0.83 C
20006.6 C-0.57 C
20036.8 C-0.31 C
20047.0 C-0.20 C
20057.7 C+0.58 C
20068.3 C+1.11 C
20077.4 C+0.26 C
20084.6 C-2.51 C
20095.7 C-1.49 C
20107.2 C+0.02 C
20117.1 C-0.05 C
20129.0 C+1.81 C
20135.8 C-1.37 C
20145.0 C-2.12 C
20157.5 C+0.38 C
20168.3 C+1.10 C
20177.8 C+0.66 C
20186.6 C-0.53 C
20196.4 C-0.79 C
20207.9 C+0.70 C
20218.3 C+1.17 C
20226.7 C-0.44 C

The fitted trend in annual mean temperature here over 1963 to 2022 is 0.02 C (-0.16 to 0.20) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.03 F (-0.30 to 0.35) per decade. The slope is a straight line fitted to 42 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Theilman 1SSW
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.02 C (-0.16 to 0.20) per decade0.03 F (-0.30 to 0.35) per decade1963 to 202242Not clearly different from zero
Mean daily maximum-0.1 C (-0.3 to 0.1) per decade-0.1 F (-0.5 to 0.2) per decade1963 to 202242Not clearly different from zero
Mean daily minimum0.1 C (-0.1 to 0.3) per decade0.2 F (-0.2 to 0.6) per decade1963 to 202242Not clearly different from zero

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

1938 to 2026
Yearly extremes at Theilman 1SSW: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)40.0 C (104.0 F)198835.6 C (96.1 F)65
Coldest night (TNn)-42.2 C (-44.0 F)1967-32.8 C (-27.0 F)65
Wettest day (Rx1day)203.2 mm (8.0 in)197858.4 mm (2.3 in)89
Wettest five days (Rx5day)254.0 mm (10.0 in)197892.2 mm (3.6 in)89
Longest dry spell (CDD)55 days195324 days89

Hottest day (TXx)

Hottest day (TXx) at Theilman 1SSW by year The hottest day of the year at Theilman 1SSW, 1938 to 2026. The record is 40.0 C (104.0 F) in 1988, marked on the chart; the median year is 35.6 C (96.1 F). 1020304019401960198020002020Record: 40.0 C (104.0 F) in 1988
The hottest day of the year at Theilman 1SSW, 1938 to 2026. The record is 40.0 C (104.0 F) in 1988, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Theilman 1SSW by year
YearHottest day (TXx)
1938n/a
1939n/a
1940n/a
1941n/a
1942n/a
1943n/a
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
196234.4 C (93.9 F)
196336.7 C (98.1 F)
196436.1 C (97.0 F)
196534.4 C (93.9 F)
196636.7 C (98.1 F)
196733.9 C (93.0 F)
196835.6 C (96.1 F)
196933.9 C (93.0 F)
197035.6 C (96.1 F)
197135.0 C (95.0 F)
197235.6 C (96.1 F)
197333.9 C (93.0 F)
197436.7 C (98.1 F)
197535.6 C (96.1 F)
197637.2 C (99.0 F)
197737.2 C (99.0 F)
197837.2 C (99.0 F)
197933.3 C (91.9 F)
198038.3 C (100.9 F)
198135.0 C (95.0 F)
198236.7 C (98.1 F)
198336.7 C (98.1 F)
198435.0 C (95.0 F)
198539.4 C (102.9 F)
198634.4 C (93.9 F)
198736.7 C (98.1 F)
198840.0 C (104.0 F)
198936.7 C (98.1 F)
199038.3 C (100.9 F)
199137.8 C (100.0 F)
199234.4 C (93.9 F)
199334.4 C (93.9 F)
199437.8 C (100.0 F)
199527.8 C (82.0 F)
199637.8 C (100.0 F)
199735.0 C (95.0 F)
199834.4 C (93.9 F)
199925.6 C (78.1 F)
200032.2 C (90.0 F)
200117.8 C (64.0 F)
200233.9 C (93.0 F)
200336.1 C (97.0 F)
200433.3 C (91.9 F)
200535.6 C (96.1 F)
200636.7 C (98.1 F)
200735.0 C (95.0 F)
200833.3 C (91.9 F)
200934.4 C (93.9 F)
201034.4 C (93.9 F)
201137.8 C (100.0 F)
201237.8 C (100.0 F)
201336.7 C (98.1 F)
201431.7 C (89.1 F)
201533.3 C (91.9 F)
201634.4 C (93.9 F)
201735.0 C (95.0 F)
201837.2 C (99.0 F)
201935.6 C (96.1 F)
202036.1 C (97.0 F)
202137.8 C (100.0 F)
202238.3 C (100.9 F)
202335.0 C (95.0 F)
202433.3 C (91.9 F)
202533.9 C (93.0 F)
202635.6 C (96.1 F)

Coldest night (TNn)

Coldest night (TNn) at Theilman 1SSW by year The coldest night of the year at Theilman 1SSW, 1938 to 2026. The record is -42.2 C (-44.0 F) in 1967, marked on the chart; the median year is -32.8 C (-27.0 F). -50-40-30-20-1019401960198020002020Record: -42.2 C (-44.0 F) in 1967
The coldest night of the year at Theilman 1SSW, 1938 to 2026. The record is -42.2 C (-44.0 F) in 1967, marked on the chart; the median year is -32.8 C (-27.0 F).
Coldest night (TNn) at Theilman 1SSW by year
YearColdest night (TNn)
1938n/a
1939n/a
1940n/a
1941n/a
1942n/a
1943n/a
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962-32.8 C (-27.0 F)
1963-39.4 C (-38.9 F)
1964-27.2 C (-17.0 F)
1965-38.9 C (-38.0 F)
1966-35.0 C (-31.0 F)
1967-42.2 C (-44.0 F)
1968-34.4 C (-29.9 F)
1969-31.7 C (-25.1 F)
1970-40.0 C (-40.0 F)
1971-38.9 C (-38.0 F)
1972-34.4 C (-29.9 F)
1973-34.4 C (-29.9 F)
1974-35.0 C (-31.0 F)
1975-34.4 C (-29.9 F)
1976-35.0 C (-31.0 F)
1977-32.2 C (-26.0 F)
1978-30.6 C (-23.1 F)
1979-37.2 C (-35.0 F)
1980-24.4 C (-11.9 F)
1981-28.9 C (-20.0 F)
1982-36.7 C (-34.1 F)
1983-38.9 C (-38.0 F)
1984-35.0 C (-31.0 F)
1985-36.1 C (-33.0 F)
1986-34.4 C (-29.9 F)
1987-29.4 C (-20.9 F)
1988-33.3 C (-27.9 F)
1989-32.2 C (-26.0 F)
1990-30.6 C (-23.1 F)
1991-28.9 C (-20.0 F)
1992-23.3 C (-9.9 F)
1993-28.9 C (-20.0 F)
1994-40.0 C (-40.0 F)
1995-24.4 C (-11.9 F)
1996-28.9 C (-20.0 F)
1997-33.3 C (-27.9 F)
1998-26.1 C (-15.0 F)
1999-28.3 C (-18.9 F)
2000-36.1 C (-33.0 F)
2001-27.2 C (-17.0 F)
2002-17.8 C (0.0 F)
2003-27.8 C (-18.0 F)
2004-32.2 C (-26.0 F)
2005-28.3 C (-18.9 F)
2006-31.1 C (-24.0 F)
2007-32.2 C (-26.0 F)
2008-33.3 C (-27.9 F)
2009-40.0 C (-40.0 F)
2010-32.8 C (-27.0 F)
2011-34.4 C (-29.9 F)
2012-25.6 C (-14.1 F)
2013-30.0 C (-22.0 F)
2014-35.0 C (-31.0 F)
2015-31.1 C (-24.0 F)
2016-33.9 C (-29.0 F)
2017-28.9 C (-20.0 F)
2018-31.7 C (-25.1 F)
2019-40.6 C (-41.1 F)
2020-32.2 C (-26.0 F)
2021-35.0 C (-31.0 F)
2022-34.4 C (-29.9 F)
2023-31.7 C (-25.1 F)
2024-32.8 C (-27.0 F)
2025-32.2 C (-26.0 F)
2026-32.8 C (-27.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Theilman 1SSW by year The wettest day of the year at Theilman 1SSW, 1938 to 2026. The record is 203.2 mm (8.0 in) in 1978, marked on the chart; the median year is 58.4 mm (2.3 in). 05010015020025019401960198020002020Record: 203.2 mm (8.0 in) in 1978
The wettest day of the year at Theilman 1SSW, 1938 to 2026. The record is 203.2 mm (8.0 in) in 1978, marked on the chart; the median year is 58.4 mm (2.3 in).
Wettest day (Rx1day) at Theilman 1SSW by year
YearWettest day (Rx1day)
193841.7 mm (1.6 in)
193941.9 mm (1.6 in)
194080.0 mm (3.1 in)
194141.9 mm (1.6 in)
194258.4 mm (2.3 in)
1943118.1 mm (4.6 in)
194449.5 mm (1.9 in)
194539.1 mm (1.5 in)
194630.5 mm (1.2 in)
194764.5 mm (2.5 in)
194847.5 mm (1.9 in)
194942.4 mm (1.7 in)
1950129.5 mm (5.1 in)
1951108.0 mm (4.3 in)
195259.7 mm (2.4 in)
195346.0 mm (1.8 in)
195491.4 mm (3.6 in)
195562.7 mm (2.5 in)
195664.8 mm (2.6 in)
195779.0 mm (3.1 in)
195839.4 mm (1.6 in)
195948.8 mm (1.9 in)
196037.6 mm (1.5 in)
196141.9 mm (1.6 in)
1962128.3 mm (5.1 in)
196333.0 mm (1.3 in)
196470.4 mm (2.8 in)
196547.0 mm (1.9 in)
1966138.7 mm (5.5 in)
196743.7 mm (1.7 in)
196848.5 mm (1.9 in)
196941.1 mm (1.6 in)
197050.8 mm (2.0 in)
197150.8 mm (2.0 in)
197247.0 mm (1.9 in)
197394.0 mm (3.7 in)
197429.2 mm (1.1 in)
197562.2 mm (2.4 in)
197659.7 mm (2.4 in)
197738.1 mm (1.5 in)
1978203.2 mm (8.0 in)
197976.7 mm (3.0 in)
198061.0 mm (2.4 in)
198166.0 mm (2.6 in)
198258.7 mm (2.3 in)
198378.0 mm (3.1 in)
198476.2 mm (3.0 in)
198539.4 mm (1.6 in)
198660.7 mm (2.4 in)
1987112.3 mm (4.4 in)
198852.1 mm (2.1 in)
198945.2 mm (1.8 in)
199067.6 mm (2.7 in)
199174.4 mm (2.9 in)
199252.3 mm (2.1 in)
199379.2 mm (3.1 in)
199456.4 mm (2.2 in)
199520.6 mm (0.8 in)
199655.9 mm (2.2 in)
199738.1 mm (1.5 in)
199869.9 mm (2.8 in)
199913.7 mm (0.5 in)
200046.2 mm (1.8 in)
200166.0 mm (2.6 in)
200241.1 mm (1.6 in)
200355.9 mm (2.2 in)
200485.6 mm (3.4 in)
200583.8 mm (3.3 in)
200666.8 mm (2.6 in)
2007151.1 mm (5.9 in)
200847.0 mm (1.9 in)
200962.2 mm (2.4 in)
2010158.8 mm (6.3 in)
201150.0 mm (2.0 in)
201245.7 mm (1.8 in)
201353.1 mm (2.1 in)
201450.3 mm (2.0 in)
201562.2 mm (2.4 in)
2016196.9 mm (7.8 in)
201781.0 mm (3.2 in)
2018100.1 mm (3.9 in)
201969.3 mm (2.7 in)
202058.7 mm (2.3 in)
202156.4 mm (2.2 in)
202241.1 mm (1.6 in)
202353.8 mm (2.1 in)
2024104.1 mm (4.1 in)
202561.0 mm (2.4 in)
202643.9 mm (1.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Theilman 1SSW by year The wettest five days of the year at Theilman 1SSW, 1938 to 2026. The record is 254.0 mm (10.0 in) in 1978, marked on the chart; the median year is 92.2 mm (3.6 in). 010020030019401960198020002020Record: 254.0 mm (10.0 in) in 1978
The wettest five days of the year at Theilman 1SSW, 1938 to 2026. The record is 254.0 mm (10.0 in) in 1978, marked on the chart; the median year is 92.2 mm (3.6 in).
Wettest five days (Rx5day) at Theilman 1SSW by year
YearWettest five days (Rx5day)
1938106.6 mm (4.2 in)
193952.0 mm (2.0 in)
194087.2 mm (3.4 in)
194167.3 mm (2.6 in)
1942171.7 mm (6.8 in)
194359.8 mm (2.4 in)
194463.5 mm (2.5 in)
194597.5 mm (3.8 in)
194656.6 mm (2.2 in)
194794.2 mm (3.7 in)
194860.7 mm (2.4 in)
194947.7 mm (1.9 in)
1950137.9 mm (5.4 in)
1951111.0 mm (4.4 in)
195281.3 mm (3.2 in)
195382.8 mm (3.3 in)
1954141.5 mm (5.6 in)
195583.0 mm (3.3 in)
195690.0 mm (3.5 in)
195789.1 mm (3.5 in)
195872.7 mm (2.9 in)
1959108.5 mm (4.3 in)
196065.4 mm (2.6 in)
196182.6 mm (3.3 in)
1962152.4 mm (6.0 in)
196359.2 mm (2.3 in)
1964131.7 mm (5.2 in)
196579.8 mm (3.1 in)
1966153.5 mm (6.0 in)
196783.3 mm (3.3 in)
1968105.9 mm (4.2 in)
196963.9 mm (2.5 in)
197090.3 mm (3.6 in)
197177.4 mm (3.0 in)
1972105.4 mm (4.1 in)
197396.8 mm (3.8 in)
197455.0 mm (2.2 in)
197595.8 mm (3.8 in)
197680.0 mm (3.1 in)
197769.3 mm (2.7 in)
1978254.0 mm (10.0 in)
1979109.8 mm (4.3 in)
198084.6 mm (3.3 in)
1981110.5 mm (4.4 in)
198270.2 mm (2.8 in)
198398.3 mm (3.9 in)
198492.9 mm (3.7 in)
198551.6 mm (2.0 in)
1986133.3 mm (5.2 in)
1987131.6 mm (5.2 in)
1988111.1 mm (4.4 in)
198957.9 mm (2.3 in)
1990103.1 mm (4.1 in)
1991115.3 mm (4.5 in)
199298.1 mm (3.9 in)
1993131.2 mm (5.2 in)
1994120.2 mm (4.7 in)
199537.0 mm (1.5 in)
199680.5 mm (3.2 in)
199776.2 mm (3.0 in)
1998181.9 mm (7.2 in)
199924.4 mm (1.0 in)
200094.7 mm (3.7 in)
200184.5 mm (3.3 in)
200265.2 mm (2.6 in)
200369.1 mm (2.7 in)
200499.4 mm (3.9 in)
2005102.1 mm (4.0 in)
200679.5 mm (3.1 in)
2007169.7 mm (6.7 in)
200886.8 mm (3.4 in)
200962.2 mm (2.4 in)
2010223.0 mm (8.8 in)
2011115.0 mm (4.5 in)
201297.6 mm (3.8 in)
201387.4 mm (3.4 in)
201498.5 mm (3.9 in)
201575.6 mm (3.0 in)
2016204.5 mm (8.1 in)
201792.2 mm (3.6 in)
2018130.6 mm (5.1 in)
2019123.4 mm (4.9 in)
2020105.2 mm (4.1 in)
2021108.9 mm (4.3 in)
202254.6 mm (2.1 in)
2023120.2 mm (4.7 in)
2024106.6 mm (4.2 in)
202565.1 mm (2.6 in)
202670.0 mm (2.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Theilman 1SSW by year The longest dry spell of the year at Theilman 1SSW, 1938 to 2026. The record is 55 days in 1953, marked on the chart; the median year is 24 days. 020406019401960198020002020Record: 55 days in 1953
The longest dry spell of the year at Theilman 1SSW, 1938 to 2026. The record is 55 days in 1953, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at Theilman 1SSW by year
YearLongest dry spell (CDD)
193814 days
193931 days
194034 days
194118 days
194230 days
194352 days
194427 days
194530 days
194624 days
194738 days
194821 days
194934 days
195017 days
195121 days
195246 days
195355 days
195423 days
195522 days
195621 days
195724 days
195825 days
195930 days
196025 days
196130 days
196228 days
196319 days
196438 days
196522 days
196626 days
196737 days
196844 days
196934 days
197031 days
197121 days
197223 days
197321 days
197420 days
197524 days
197639 days
197718 days
197819 days
197919 days
198030 days
198124 days
198233 days
198320 days
198422 days
198518 days
198622 days
198730 days
198831 days
198933 days
199020 days
199132 days
199224 days
199319 days
199427 days
199523 days
199616 days
199718 days
199815 days
199925 days
200023 days
200116 days
200241 days
200326 days
200423 days
200519 days
200621 days
200733 days
200820 days
200921 days
201029 days
201123 days
201223 days
201320 days
201422 days
201539 days
201624 days
201719 days
201820 days
201918 days
202038 days
202116 days
202224 days
202331 days
202434 days
202538 days
202631 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

42 years with a frost

Across 42 years with a frost, the median last spring frost at Theilman 1SSW falls on 13 May and the median first autumn frost on 27 September, which leaves a median of 141 days between them.

Fitted over all years, the growing season changes by +4.0 days per decade at this station.

Frost dates and growing season at Theilman 1SSW
MeasureMedian, all yearsEarliest periodRecent period (1981 to 2022)Recent against earliestFitted trend
Last spring frost13 Mayn/a13 Mayn/a-2.0 days per decade
First autumn frost27 Septembern/a29 Septembern/a+1.9 days per decade
Growing days141 daysn/a143 daysn/a+4.0 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

78 years, 1939 to 2025

A day with at least 57.9 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 222.3 mm (8.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Theilman 1SSW: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years57.9 mm (2.3 in)
5 years83.8 mm (3.3 in)
10 years106.5 mm (4.2 in)
25 years143.6 mm (5.7 in)
50 years179.0 mm (7.0 in)
100 years222.3 mm (8.8 in)Longer than the 78 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, 78 years of values from 1939 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: 203.2 mm (8.0 in) in 1978; 196.9 mm (7.8 in) in 2016; 158.8 mm (6.3 in) in 2010.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Climate Twins

2008 to 2022 against 1961 to 1990

Over 2008 to 2022, Theilman 1SSW had a mean temperature of 6.9 C (44.5 F) and 934.0 mm (36.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Albert Lea 3SE (United States, 116 km away), Mason City Muni AP (United States, 155 km away) and Montreal Jar Bot (Canada, 1,471 km away).

Climate twins of Theilman 1SSW: stations whose 1961 to 1990 climate is closest to its 2008 to 2022 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Albert Lea 3SEUnited States116 km (72 mi)7.1 C (44.7 F)812.2 mm (32.0 in)1.02
Mason City Muni APUnited States155 km (96 mi)7.3 C (45.1 F)831.9 mm (32.8 in)1.03
Montreal Jar BotCanada1,471 km (914 mi)6.6 C (43.9 F)1,043.3 mm (41.1 in)1.07

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Theilman 1SSW standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Theilman 1SSW 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 (2026-10-15).