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St Louis Sci Ctr Weather Records (USC00237452)

Record envelope, standing records and threshold days for St Louis Sci Ctr (USC00237452), Missouri, United States, with 59 years of record.

Key Facts for St Louis Sci Ctr

  • St Louis Sci Ctr (USC00237452) is a weather station in Missouri, United States at 38.63 latitude and -90.27 longitude, 157 m (515 ft) above sea level.
  • The station reports from 1968 to 2026, 59 years of record.
  • 1,464 records set at St Louis Sci Ctr still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • St Louis Sci Ctr set a daily record precipitation of 44.5 mm (1.8 in) on 17 August 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Missouri, United States, 38.63 latitude, -90.27 longitude.
  • Elevation: 157 m (515 ft).
  • Period of record: 1968 to 2026, 59 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at St Louis Sci Ctr, with 2026 drawn through them The band shows the record high and record low for each calendar day at St Louis Sci Ctr. The lines show the 2026 daily maximum and minimum. 0 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 St Louis Sci Ctr. 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 St Louis Sci Ctr, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan24.4 C (75.9 F)-23.3 C (-9.9 F)n/an/a
Feb26.7 C (80.1 F)-25.0 C (-13.0 F)n/an/a
Mar31.1 C (88.0 F)-16.7 C (1.9 F)n/an/a
Apr33.9 C (93.0 F)-6.7 C (19.9 F)n/an/a
May35.0 C (95.0 F)1.1 C (34.0 F)n/an/a
Jun41.1 C (106.0 F)8.9 C (48.0 F)n/an/a
Jul41.7 C (107.1 F)11.7 C (53.1 F)n/an/a
Aug40.0 C (104.0 F)10.6 C (51.1 F)n/an/a
Sep40.0 C (104.0 F)1.7 C (35.1 F)n/an/a
Oct34.4 C (93.9 F)-2.2 C (28.0 F)n/an/a
Nov30.0 C (86.0 F)-13.9 C (7.0 F)n/an/a
Dec25.6 C (78.1 F)-27.2 C (-17.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at St Louis Sci Ctr by the year they were set 1,464 records at St Louis Sci Ctr still stand. 2012 holds the most, with 69. 0204060801968: 81969: 251970: 331971: 461972: 361973: 181974: 361975: 251976: 511977: 351978: 261987: 181988: 491989: 521990: 651991: 151992: 401993: 391994: 251995: 371996: 611997: 391998: 301999: 322002: 82003: 402004: 242005: 322006: 352007: 402008: 212009: 262010: 462011: 512012: 692013: 402014: 422015: 352016: 302017: 412018: 43196819731978199119962003200820132018
1,464 records at St Louis Sci Ctr still stand. 2012 holds the most, with 69.
Standing records at St Louis Sci Ctr by the year they were set
Year setStanding records
19688
196925
197033
197146
197236
197318
197436
197525
197651
197735
197826
198718
198849
198952
199065
199115
199240
199339
199425
199537
199661
199739
199830
199932
20028
200340
200424
200532
200635
200740
200821
200926
201046
201151
201269
201340
201442
201535
201630
201741
201843

All-Time Record Progression

4 new records
When St Louis Sci Ctr set new all-time records 4 all-time records were set at St Louis Sci Ctr between 30 June 2012 and 26 July 2022. Each dot is a new record. Record high maximum temperatureRecord daily precipitation30 June 2012: Record high maximum temperature 41.1 C (106.0 F)26 July 2012: Record high maximum temperature 41.7 C (107.1 F)22 July 2019: Record daily precipitation 135.1 mm (5.3 in)26 July 2022: Record daily precipitation 221.7 mm (8.7 in)20152020
4 all-time records were set at St Louis Sci Ctr between 30 June 2012 and 26 July 2022. Each dot is a new record.
When St Louis Sci Ctr set new all-time records
DateKindDetail
2012-06-30Record high maximum temperatureRecord high maximum temperature 41.1 C (106.0 F)
2012-07-26Record high maximum temperatureRecord high maximum temperature 41.7 C (107.1 F)
2019-07-22Record daily precipitationRecord daily precipitation 135.1 mm (5.3 in)
2022-07-26Record daily precipitationRecord daily precipitation 221.7 mm (8.7 in)

Wettest Day of Each Month

Jul: 221.7 mm (8.7 in)
Record daily precipitation for each month at St Louis Sci Ctr The wettest day on record for each calendar month at St Louis Sci Ctr. The most was 221.7 mm (8.7 in) on 26 July 2022. 0100200300 Jan: 80.0 mm (3.1 in), 5 January 2005 Jan Feb: 78.7 mm (3.1 in), 4 February 1990 Feb Mar: 85.3 mm (3.4 in), 28 March 1977 Mar Apr: 90.4 mm (3.6 in), 30 April 2017 Apr May: 89.2 mm (3.5 in), 17 May 1995 May Jun: 106.9 mm (4.2 in), 26 June 2003 Jun Jul: 221.7 mm (8.7 in), 26 July 2022 Jul Aug: 111.5 mm (4.4 in), 15 August 2016 Aug Sep: 114.3 mm (4.5 in), 14 September 2008 Sep Oct: 66.0 mm (2.6 in), 30 October 2009 Oct Nov: 117.1 mm (4.6 in), 18 November 2003 Nov Dec: 101.6 mm (4.0 in), 27 December 2015 Dec
The wettest day on record for each calendar month at St Louis Sci Ctr. The most was 221.7 mm (8.7 in) on 26 July 2022.
Record daily precipitation for each month at St Louis Sci Ctr
MonthRecord daily precipitation (mm)Date
Jan80.0 mm (3.1 in)5 January 2005
Feb78.7 mm (3.1 in)4 February 1990
Mar85.3 mm (3.4 in)28 March 1977
Apr90.4 mm (3.6 in)30 April 2017
May89.2 mm (3.5 in)17 May 1995
Jun106.9 mm (4.2 in)26 June 2003
Jul221.7 mm (8.7 in)26 July 2022
Aug111.5 mm (4.4 in)15 August 2016
Sep114.3 mm (4.5 in)14 September 2008
Oct66.0 mm (2.6 in)30 October 2009
Nov117.1 mm (4.6 in)18 November 2003
Dec101.6 mm (4.0 in)27 December 2015

Period of Record Coverage

1968 to 2018
Days with data per year at St Louis Sci Ctr 42 years of record at St Louis Sci Ctr, 1968 to 2018. 14 years have data for under 90 percent of days and are left out of rankings: 1968, 1974, 1978, 1987, 1989, 1991, 1992, 2000 and others. 1968: 122 of 366 days1969: 363 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 303 of 365 days1975: 365 of 365 days1976: 365 of 366 days1977: 365 of 365 days1978: 130 of 365 days1987: 156 of 365 days1988: 330 of 366 days1989: 320 of 365 days1990: 345 of 365 days1991: 221 of 365 days1992: 296 of 366 days1993: 358 of 365 days1994: 359 of 365 days1995: 356 of 365 days1996: 361 of 366 days1997: 358 of 365 days1998: 355 of 365 days1999: 357 of 365 days2000: 33 of 366 days2002: 133 of 365 days2003: 322 of 365 days2004: 344 of 366 days2005: 351 of 365 days2006: 345 of 365 days2007: 336 of 365 days2008: 305 of 366 days2009: 342 of 365 days2010: 331 of 365 days2011: 341 of 365 days2012: 346 of 366 days2013: 341 of 365 days2014: 340 of 365 days2015: 320 of 365 days2016: 331 of 366 days2017: 325 of 365 days2018: 203 of 365 days1970199020002010
42 years of record at St Louis Sci Ctr, 1968 to 2018. 14 years have data for under 90 percent of days and are left out of rankings: 1968, 1974, 1978, 1987, 1989, 1991, 1992, 2000 and others.
Days with data per year at St Louis Sci Ctr
YearDays with dataShare of yearComplete
196812233%No
196936399%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
197430383%No
1975365100%Yes
1976365100%Yes
1977365100%Yes
197813036%No
198715643%No
198833090%Yes
198932088%No
199034595%Yes
199122161%No
199229681%No
199335898%Yes
199435998%Yes
199535698%Yes
199636199%Yes
199735898%Yes
199835597%Yes
199935798%Yes
2000339%No
200213336%No
200332288%No
200434494%Yes
200535196%Yes
200634595%Yes
200733692%Yes
200830583%No
200934294%Yes
201033191%Yes
201134193%Yes
201234695%Yes
201334193%Yes
201434093%Yes
201532088%No
201633190%Yes
201732589%No
201820356%No

Latest Records

20
Latest records at St Louis Sci Ctr
DateStationRecordValueBeat old record byOld record stoodSignificance
17 August 2026St Louis Sci Ctr, USdaily rain (Provisional)44.5 mm (1.8 in)7.4 mm (0.29 in)56 years25 of 100 (Routine)
31 July 2026St Louis Sci Ctr, USdaily rain38.4 mm (1.5 in)18.8 mm (0.7 in)16 years18 of 100 (Routine)
11 July 2026St Louis Sci Ctr, USdaily rain59.2 mm (2.3 in)36.1 mm (1.4 in)4 years24 of 100 (Routine)
8 June 2026St Louis Sci Ctr, USdaily rain32.3 mm (1.3 in)14.8 mm (0.6 in)12 years17 of 100 (Routine)
5 March 2026St Louis Sci Ctr, USdaily rain36.3 mm (1.4 in)8.4 mm (0.33 in)15 years16 of 100 (Routine)
31 January 2026St Louis Sci Ctr, USdaily snow depth12.7 cm (5.0 in)10.2 cm (4.0 in)54 years41 of 100 (Notable)
29 January 2026St Louis Sci Ctr, USdaily snow depth (Tie)12.7 cm (5.0 in)tie16 years2 of 100 (Routine)
9 January 2026St Louis Sci Ctr, USdaily rain12.7 mm (0.5 in)1.8 mm (0.07 in)28 years14 of 100 (Routine)
6 December 2025St Louis Sci Ctr, USdaily snow depth (Tie)2.5 cm (1.0 in)tie28 years3 of 100 (Routine)
5 December 2025St Louis Sci Ctr, USdaily snow depth5.1 cm (2.0 in)2.6 cm (1.0 in)28 years17 of 100 (Routine)
2 December 2025St Louis Sci Ctr, USdaily snowfall9.1 cm (3.6 in)8.8 cm (3.5 in)0 years20 of 100 (Routine)
2 December 2025St Louis Sci Ctr, USdaily snow depth12.7 cm (5.0 in)7.6 cm (3.0 in)0 years18 of 100 (Routine)
30 November 2025St Louis Sci Ctr, USdaily snow depth (Tie)5.1 cm (2.0 in)tie0 years1 of 100 (Routine)
29 November 2025St Louis Sci Ctr, USmonthly snowfall (Tie)12.7 cm (5.0 in)tie7 years4 of 100 (Routine)
29 November 2025St Louis Sci Ctr, USmonthly snow depth (Tie)12.7 cm (5.0 in)tie7 years4 of 100 (Routine)
11 August 2025St Louis Sci Ctr, USdaily rain30.5 mm (1.2 in)0.5 mm (0.02 in)19 years10 of 100 (Routine)
21 July 2025St Louis Sci Ctr, USdaily rain65.8 mm (2.6 in)33.5 mm (1.3 in)36 years32 of 100 (Routine)
20 May 2025St Louis Sci Ctr, USdaily rain53.6 mm (2.1 in)17.8 mm (0.7 in)3 years19 of 100 (Routine)
21 April 2025St Louis Sci Ctr, USdaily rain21.1 mm (0.8 in)0.8 mm (0.03 in)52 years20 of 100 (Routine)
6 April 2025St Louis Sci Ctr, USdaily rain18.5 mm (0.7 in)0.7 mm (0.03 in)54 years20 of 100 (Routine)

Climate Trend

29 complete years, 1969 to 2016
Annual mean temperature at St Louis Sci Ctr as warming stripes, 1969 to 2016 One stripe for each of 29 complete years at St Louis Sci Ctr, 1969 to 2016. Blue stripes are years cooler than the station's own mean of 14.2 C (57.5 F); red stripes are warmer. The coolest year was 1996, at 12.7 C (54.9 F), and the warmest was 2012, at 16.2 C (61.1 F). The strongest colour marks a difference of 2.1 C (3.8 F). 1969: 13.9 C, -0.3 C from the station mean1970: 14.6 C, +0.4 C from the station mean1971: 15.2 C, +1.1 C from the station mean1972: 13.0 C, -1.1 C from the station mean1973: 14.2 C, +0.1 C from the station mean1975: 13.9 C, -0.2 C from the station mean1976: 13.5 C, -0.7 C from the station mean1977: 13.7 C, -0.5 C from the station mean1988: 13.6 C, -0.6 C from the station mean1989: 12.9 C, -1.3 C from the station mean1990: 14.6 C, +0.5 C from the station mean1993: 12.9 C, -1.3 C from the station mean1994: 13.7 C, -0.4 C from the station mean1995: 13.4 C, -0.8 C from the station mean1996: 12.7 C, -1.5 C from the station mean1997: 13.0 C, -1.2 C from the station mean1998: 15.2 C, +1.0 C from the station mean1999: 14.8 C, +0.6 C from the station mean2004: 14.4 C, +0.3 C from the station mean2005: 14.7 C, +0.5 C from the station mean2006: 15.2 C, +1.0 C from the station mean2007: 15.2 C, +1.0 C from the station mean2009: 14.1 C, -0.1 C from the station mean2011: 14.9 C, +0.7 C from the station mean2012: 16.2 C, +2.0 C from the station mean2013: 13.8 C, -0.4 C from the station mean2014: 13.3 C, -0.9 C from the station mean2015: 14.7 C, +0.6 C from the station mean2016: 15.6 C, +1.4 C from the station mean1969197519801985199019952000200520102015
One stripe for each of 29 complete years at St Louis Sci Ctr, 1969 to 2016. Blue stripes are years cooler than the station's own mean of 14.2 C (57.5 F); red stripes are warmer. The coolest year was 1996, at 12.7 C (54.9 F), and the warmest was 2012, at 16.2 C (61.1 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at St Louis Sci Ctr as warming stripes, 1969 to 2016
YearAnnual mean temperatureDifference from the station mean
196913.9 C-0.28 C
197014.6 C+0.44 C
197115.2 C+1.06 C
197213.0 C-1.13 C
197314.2 C+0.08 C
197513.9 C-0.24 C
197613.5 C-0.71 C
197713.7 C-0.48 C
198813.6 C-0.55 C
198912.9 C-1.27 C
199014.6 C+0.48 C
199312.9 C-1.31 C
199413.7 C-0.44 C
199513.4 C-0.79 C
199612.7 C-1.45 C
199713.0 C-1.16 C
199815.2 C+1.04 C
199914.8 C+0.59 C
200414.4 C+0.27 C
200514.7 C+0.55 C
200615.2 C+1.01 C
200715.2 C+1.00 C
200914.1 C-0.06 C
201114.9 C+0.75 C
201216.2 C+2.02 C
201313.8 C-0.40 C
201413.3 C-0.91 C
201514.7 C+0.56 C
201615.6 C+1.41 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

1968 to 2026
Yearly extremes at St Louis Sci Ctr: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)41.7 C (107.1 F)201237.5 C (99.5 F)42
Coldest night (TNn)-27.2 C (-17.0 F)1989-16.7 C (1.9 F)42
Wettest day (Rx1day)221.7 mm (8.7 in)202266.8 mm (2.6 in)51
Wettest five days (Rx5day)221.7 mm (8.7 in)202291.7 mm (3.6 in)51
Longest dry spell (CDD)32 days199620 days51

Hottest day (TXx)

Hottest day (TXx) at St Louis Sci Ctr by year The hottest day of the year at St Louis Sci Ctr, 1968 to 2026. The record is 41.7 C (107.1 F) in 2012, marked on the chart; the median year is 37.5 C (99.5 F). 20304050197019801990200020102020Record: 41.7 C (107.1 F) in 2012
The hottest day of the year at St Louis Sci Ctr, 1968 to 2026. The record is 41.7 C (107.1 F) in 2012, marked on the chart; the median year is 37.5 C (99.5 F).
Hottest day (TXx) at St Louis Sci Ctr by year
YearHottest day (TXx)
196836.1 C (97.0 F)
196936.7 C (98.1 F)
197040.0 C (104.0 F)
197138.3 C (100.9 F)
197236.7 C (98.1 F)
197336.1 C (97.0 F)
197435.6 C (96.1 F)
197537.8 C (100.0 F)
197638.3 C (100.9 F)
197737.8 C (100.0 F)
197830.0 C (86.0 F)
198739.4 C (102.9 F)
198838.9 C (102.0 F)
198936.1 C (97.0 F)
199038.3 C (100.9 F)
199138.3 C (100.9 F)
199236.1 C (97.0 F)
199336.1 C (97.0 F)
199435.6 C (96.1 F)
199537.8 C (100.0 F)
199636.1 C (97.0 F)
199737.8 C (100.0 F)
199837.2 C (99.0 F)
199940.6 C (105.1 F)
200020.0 C (68.0 F)
2001n/a
200236.1 C (97.0 F)
200340.0 C (104.0 F)
200436.1 C (97.0 F)
200538.3 C (100.9 F)
200639.4 C (102.9 F)
200740.0 C (104.0 F)
200837.2 C (99.0 F)
200937.2 C (99.0 F)
201040.0 C (104.0 F)
201140.0 C (104.0 F)
201241.7 C (107.1 F)
201338.3 C (100.9 F)
201437.2 C (99.0 F)
201536.7 C (98.1 F)
201637.2 C (99.0 F)
201739.4 C (102.9 F)
201837.2 C (99.0 F)
2019n/a
2020n/a
2021n/a
2022n/a
2023n/a
2024n/a
2025n/a
2026n/a

Coldest night (TNn)

Coldest night (TNn) at St Louis Sci Ctr by year The coldest night of the year at St Louis Sci Ctr, 1968 to 2026. The record is -27.2 C (-17.0 F) in 1989, marked on the chart; the median year is -16.7 C (1.9 F). -30-25-20-15-10-5197019801990200020102020Record: -27.2 C (-17.0 F) in 1989
The coldest night of the year at St Louis Sci Ctr, 1968 to 2026. The record is -27.2 C (-17.0 F) in 1989, marked on the chart; the median year is -16.7 C (1.9 F).
Coldest night (TNn) at St Louis Sci Ctr by year
YearColdest night (TNn)
1968-16.1 C (3.0 F)
1969-16.7 C (1.9 F)
1970-21.1 C (-6.0 F)
1971-16.1 C (3.0 F)
1972-20.6 C (-5.1 F)
1973-16.1 C (3.0 F)
1974-11.7 C (10.9 F)
1975-16.7 C (1.9 F)
1976-18.3 C (-0.9 F)
1977-23.3 C (-9.9 F)
1978-17.8 C (0.0 F)
1987-9.4 C (15.1 F)
1988-20.0 C (-4.0 F)
1989-27.2 C (-17.0 F)
1990-16.7 C (1.9 F)
1991-13.9 C (7.0 F)
1992-11.7 C (10.9 F)
1993-17.8 C (0.0 F)
1994-22.8 C (-9.0 F)
1995-16.7 C (1.9 F)
1996-25.0 C (-13.0 F)
1997-19.4 C (-2.9 F)
1998-16.7 C (1.9 F)
1999-18.9 C (-2.0 F)
2000-11.1 C (12.0 F)
2001n/a
2002-9.4 C (15.1 F)
2003-17.2 C (1.0 F)
2004-16.7 C (1.9 F)
2005-13.9 C (7.0 F)
2006-15.6 C (3.9 F)
2007-14.4 C (6.1 F)
2008-15.6 C (3.9 F)
2009-17.8 C (0.0 F)
2010-16.1 C (3.0 F)
2011-15.6 C (3.9 F)
2012-9.4 C (15.1 F)
2013-14.4 C (6.1 F)
2014-17.2 C (1.0 F)
2015-16.1 C (3.0 F)
2016-16.7 C (1.9 F)
2017-21.1 C (-6.0 F)
2018-20.6 C (-5.1 F)
2019n/a
2020n/a
2021n/a
2022n/a
2023n/a
2024n/a
2025n/a
2026n/a

Wettest day (Rx1day)

Wettest day (Rx1day) at St Louis Sci Ctr by year The wettest day of the year at St Louis Sci Ctr, 1968 to 2026. The record is 221.7 mm (8.7 in) in 2022, marked on the chart; the median year is 66.8 mm (2.6 in). 050100150200250197019801990200020102020Record: 221.7 mm (8.7 in) in 2022
The wettest day of the year at St Louis Sci Ctr, 1968 to 2026. The record is 221.7 mm (8.7 in) in 2022, marked on the chart; the median year is 66.8 mm (2.6 in).
Wettest day (Rx1day) at St Louis Sci Ctr by year
YearWettest day (Rx1day)
196851.6 mm (2.0 in)
196952.1 mm (2.1 in)
197073.4 mm (2.9 in)
197185.1 mm (3.4 in)
197272.4 mm (2.9 in)
197366.0 mm (2.6 in)
197450.8 mm (2.0 in)
197550.8 mm (2.0 in)
197649.0 mm (1.9 in)
197785.3 mm (3.4 in)
197824.4 mm (1.0 in)
198758.4 mm (2.3 in)
198840.9 mm (1.6 in)
198952.1 mm (2.1 in)
199079.2 mm (3.1 in)
199164.0 mm (2.5 in)
199255.9 mm (2.2 in)
199376.7 mm (3.0 in)
199470.1 mm (2.8 in)
199589.2 mm (3.5 in)
199688.4 mm (3.5 in)
199739.1 mm (1.5 in)
199853.8 mm (2.1 in)
199968.6 mm (2.7 in)
200088.1 mm (3.5 in)
200143.4 mm (1.7 in)
200291.7 mm (3.6 in)
2003117.1 mm (4.6 in)
200474.9 mm (2.9 in)
200580.0 mm (3.1 in)
200656.6 mm (2.2 in)
200750.5 mm (2.0 in)
2008114.3 mm (4.5 in)
200966.0 mm (2.6 in)
201048.5 mm (1.9 in)
201155.9 mm (2.2 in)
201266.8 mm (2.6 in)
201358.4 mm (2.3 in)
201450.8 mm (2.0 in)
2015101.6 mm (4.0 in)
2016111.5 mm (4.4 in)
201790.4 mm (3.6 in)
201854.6 mm (2.1 in)
2019135.1 mm (5.3 in)
202070.6 mm (2.8 in)
202159.2 mm (2.3 in)
2022221.7 mm (8.7 in)
202367.3 mm (2.6 in)
202487.4 mm (3.4 in)
202578.7 mm (3.1 in)
202659.2 mm (2.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at St Louis Sci Ctr by year The wettest five days of the year at St Louis Sci Ctr, 1968 to 2026. The record is 221.7 mm (8.7 in) in 2022, marked on the chart; the median year is 91.7 mm (3.6 in). 050100150200250197019801990200020102020Record: 221.7 mm (8.7 in) in 2022
The wettest five days of the year at St Louis Sci Ctr, 1968 to 2026. The record is 221.7 mm (8.7 in) in 2022, marked on the chart; the median year is 91.7 mm (3.6 in).
Wettest five days (Rx5day) at St Louis Sci Ctr by year
YearWettest five days (Rx5day)
196859.2 mm (2.3 in)
196987.4 mm (3.4 in)
1970153.0 mm (6.0 in)
1971140.5 mm (5.5 in)
197283.9 mm (3.3 in)
197386.3 mm (3.4 in)
197482.2 mm (3.2 in)
197591.8 mm (3.6 in)
197667.5 mm (2.7 in)
1977103.3 mm (4.1 in)
197847.9 mm (1.9 in)
198772.1 mm (2.8 in)
198887.6 mm (3.4 in)
198979.0 mm (3.1 in)
1990128.2 mm (5.0 in)
199164.0 mm (2.5 in)
1992105.7 mm (4.2 in)
1993116.6 mm (4.6 in)
1994134.7 mm (5.3 in)
1995175.8 mm (6.9 in)
1996142.5 mm (5.6 in)
199782.3 mm (3.2 in)
1998142.2 mm (5.6 in)
199989.7 mm (3.5 in)
2000122.2 mm (4.8 in)
200191.7 mm (3.6 in)
200291.7 mm (3.6 in)
2003132.6 mm (5.2 in)
2004128.5 mm (5.1 in)
2005152.6 mm (6.0 in)
200658.4 mm (2.3 in)
200779.8 mm (3.1 in)
2008137.2 mm (5.4 in)
2009121.4 mm (4.8 in)
201092.4 mm (3.6 in)
201174.0 mm (2.9 in)
2012106.7 mm (4.2 in)
201391.2 mm (3.6 in)
201473.0 mm (2.9 in)
2015187.8 mm (7.4 in)
2016150.9 mm (5.9 in)
201756.6 mm (2.2 in)
201882.5 mm (3.2 in)
2019159.5 mm (6.3 in)
2020111.0 mm (4.4 in)
202183.8 mm (3.3 in)
2022221.7 mm (8.7 in)
202380.8 mm (3.2 in)
202480.3 mm (3.2 in)
2025110.4 mm (4.3 in)
202690.8 mm (3.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at St Louis Sci Ctr by year The longest dry spell of the year at St Louis Sci Ctr, 1968 to 2026. The record is 32 days in 1996, marked on the chart; the median year is 20 days. 10203040197019801990200020102020Record: 32 days in 1996
The longest dry spell of the year at St Louis Sci Ctr, 1968 to 2026. The record is 32 days in 1996, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at St Louis Sci Ctr by year
YearLongest dry spell (CDD)
196816 days
196917 days
197026 days
197120 days
197222 days
197315 days
197413 days
197516 days
197625 days
197720 days
197826 days
198714 days
198820 days
198915 days
199019 days
199131 days
199219 days
199314 days
199416 days
199527 days
199632 days
199724 days
199814 days
199928 days
200013 days
200116 days
200221 days
200325 days
200425 days
200521 days
200622 days
200721 days
200817 days
200926 days
201020 days
201118 days
201222 days
201318 days
201420 days
201526 days
201614 days
201731 days
201811 days
201913 days
202019 days
202115 days
202217 days
202321 days
202427 days
202522 days
202615 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

29 years with a frost

Across 29 years with a frost, the median last spring frost at St Louis Sci Ctr falls on 5 April and the median first autumn frost on 7 November, which leaves a median of 215 days between them.

Fitted over all years, the growing season changes by +2.9 days per decade at this station.

Frost dates and growing season at St Louis Sci Ctr
MeasureMedian, all yearsEarliest periodRecent period (1969 to 2016)Recent against earliestFitted trend
Last spring frost5 Apriln/a5 Apriln/a-2.0 days per decade
First autumn frost7 Novembern/a7 Novembern/a+0.9 days per decade
Growing days215 daysn/a215 daysn/a+2.9 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

34 years, 1969 to 2016

A day with at least 66.8 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 128.6 mm (5.1 in) of rain is expected about once in 100 years.

Rainfall return levels at St Louis Sci Ctr: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years66.8 mm (2.6 in)
5 years85.2 mm (3.4 in)
10 years96.7 mm (3.8 in)
25 years110.2 mm (4.3 in)
50 years119.7 mm (4.7 in)Longer than the 34 years of record
100 years128.6 mm (5.1 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 1969 to 2016.

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: 117.1 mm (4.6 in) in 2003; 111.5 mm (4.4 in) in 2016; 101.6 mm (4.0 in) in 2015.

Download the Data

  • Data for St Louis Sci Ctr standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for St Louis Sci Ctr 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-13).