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Lenox Weather Records (USC00134746)

Record envelope, standing records and threshold days for Lenox (USC00134746), Iowa, United States, with 57 years of record.

Key Facts for Lenox

  • Lenox (USC00134746) is a weather station in Iowa, United States at 40.88 latitude and -94.56 longitude, 395 m (1,295 ft) above sea level.
  • The station reports from 1895 to 1951, 57 years of record.
  • 1,464 records set at Lenox still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Lenox set a daily record precipitation of 41.7 mm (1.6 in) on 9 September 1951.

About the Station

  • Location: Iowa, United States, 40.88 latitude, -94.56 longitude.
  • Elevation: 395 m (1,295 ft).
  • Period of record: 1895 to 1951, 57 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 Lenox, with 2026 drawn through them The band shows the record high and record low for each calendar day at Lenox. 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 Lenox. 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 Lenox, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan17.2 C (63.0 F)-35.0 C (-31.0 F)n/an/a
Feb26.1 C (79.0 F)-38.3 C (-36.9 F)n/an/a
Mar31.1 C (88.0 F)-25.6 C (-14.1 F)n/an/a
Apr34.4 C (93.9 F)-12.8 C (9.0 F)n/an/a
May41.7 C (107.1 F)-6.1 C (21.0 F)n/an/a
Jun41.7 C (107.1 F)3.9 C (39.0 F)n/an/a
Jul46.1 C (115.0 F)7.8 C (46.0 F)n/an/a
Aug45.0 C (113.0 F)4.4 C (39.9 F)n/an/a
Sep38.9 C (102.0 F)-3.9 C (25.0 F)n/an/a
Oct33.9 C (93.0 F)-17.2 C (1.0 F)n/an/a
Nov27.2 C (81.0 F)-22.2 C (-8.0 F)n/an/a
Dec20.0 C (68.0 F)-31.7 C (-25.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Lenox by the year they were set 1,464 records at Lenox still stand. 1936 holds the most, with 79. 0204060801898: 401899: 461900: 281901: 251902: 401903: 321904: 251905: 371906: 301907: 311908: 201909: 311910: 311911: 391912: 381913: 401914: 311915: 391916: 271917: 351918: 381919: 191920: 221921: 321922: 211923: 201924: 411925: 401926: 331927: 311928: 361929: 281930: 531931: 601932: 281933: 331934: 701935: 291936: 791937: 391938: 291939: 18189819031908191319181923192819331938
1,464 records at Lenox still stand. 1936 holds the most, with 79.
Standing records at Lenox by the year they were set
Year setStanding records
189840
189946
190028
190125
190240
190332
190425
190537
190630
190731
190820
190931
191031
191139
191238
191340
191431
191539
191627
191735
191838
191919
192022
192132
192221
192320
192441
192540
192633
192731
192836
192928
193053
193160
193228
193333
193470
193529
193679
193739
193829
193918

All-Time Record Progression

5 new records
When Lenox set new all-time records 5 all-time records were set at Lenox between 9 July 1930 and 25 July 1936. Each dot is a new record. Record high minimum temperatureRecord high maximum temperature9 July 1930: Record high minimum temperature 26.7 C (80.1 F)19 July 1934: Record high maximum temperature 44.4 C (111.9 F)9 August 1934: Record high maximum temperature 45.0 C (113.0 F)25 July 1936: Record high maximum temperature 46.1 C (115.0 F)25 July 1936: Record high minimum temperature 29.4 C (84.9 F)19301935
5 all-time records were set at Lenox between 9 July 1930 and 25 July 1936. Each dot is a new record.
When Lenox set new all-time records
DateKindDetail
1930-07-09Record high minimum temperatureRecord high minimum temperature 26.7 C (80.1 F)
1934-07-19Record high maximum temperatureRecord high maximum temperature 44.4 C (111.9 F)
1934-08-09Record high maximum temperatureRecord high maximum temperature 45.0 C (113.0 F)
1936-07-25Record high maximum temperatureRecord high maximum temperature 46.1 C (115.0 F)
1936-07-25Record high minimum temperatureRecord high minimum temperature 29.4 C (84.9 F)

Wettest Day of Each Month

Aug: 168.9 mm (6.6 in)
Record daily precipitation for each month at Lenox The wettest day on record for each calendar month at Lenox. The most was 168.9 mm (6.6 in) on 27 August 1903. 050100150200 Jan: 33.0 mm (1.3 in), 20 January 1904 Jan Feb: 40.6 mm (1.6 in), 26 February 1912 Feb Mar: 58.2 mm (2.3 in), 31 March 1897 Mar Apr: 121.9 mm (4.8 in), 20 April 1918 Apr May: 126.0 mm (5.0 in), 8 May 1950 May Jun: 106.2 mm (4.2 in), 26 June 1932 Jun Jul: 99.1 mm (3.9 in), 6 July 1909 Jul Aug: 168.9 mm (6.6 in), 27 August 1903 Aug Sep: 121.2 mm (4.8 in), 1 September 1914 Sep Oct: 106.7 mm (4.2 in), 31 October 1900 Oct Nov: 92.7 mm (3.6 in), 23 November 1931 Nov Dec: 40.1 mm (1.6 in), 31 December 1931 Dec
The wettest day on record for each calendar month at Lenox. The most was 168.9 mm (6.6 in) on 27 August 1903.
Record daily precipitation for each month at Lenox
MonthRecord daily precipitation (mm)Date
Jan33.0 mm (1.3 in)20 January 1904
Feb40.6 mm (1.6 in)26 February 1912
Mar58.2 mm (2.3 in)31 March 1897
Apr121.9 mm (4.8 in)20 April 1918
May126.0 mm (5.0 in)8 May 1950
Jun106.2 mm (4.2 in)26 June 1932
Jul99.1 mm (3.9 in)6 July 1909
Aug168.9 mm (6.6 in)27 August 1903
Sep121.2 mm (4.8 in)1 September 1914
Oct106.7 mm (4.2 in)31 October 1900
Nov92.7 mm (3.6 in)23 November 1931
Dec40.1 mm (1.6 in)31 December 1931

Period of Record Coverage

1898 to 1939
Days with data per year at Lenox 42 years of record at Lenox, 1898 to 1939. 2 years have data for under 90 percent of days and are left out of rankings: 1898, 1939. 1898: 323 of 365 days1899: 365 of 365 days1900: 360 of 365 days1901: 360 of 365 days1902: 359 of 365 days1903: 364 of 365 days1904: 361 of 366 days1905: 355 of 365 days1906: 365 of 365 days1907: 362 of 365 days1908: 360 of 366 days1909: 362 of 365 days1910: 363 of 365 days1911: 362 of 365 days1912: 362 of 366 days1913: 365 of 365 days1914: 362 of 365 days1915: 362 of 365 days1916: 360 of 366 days1917: 330 of 365 days1918: 363 of 365 days1919: 360 of 365 days1920: 366 of 366 days1921: 364 of 365 days1922: 364 of 365 days1923: 364 of 365 days1924: 366 of 366 days1925: 364 of 365 days1926: 365 of 365 days1927: 361 of 365 days1928: 355 of 366 days1929: 364 of 365 days1930: 364 of 365 days1931: 364 of 365 days1932: 365 of 366 days1933: 364 of 365 days1934: 364 of 365 days1935: 364 of 365 days1936: 365 of 366 days1937: 365 of 365 days1938: 364 of 365 days1939: 149 of 365 days1900191019201930
42 years of record at Lenox, 1898 to 1939. 2 years have data for under 90 percent of days and are left out of rankings: 1898, 1939.
Days with data per year at Lenox
YearDays with dataShare of yearComplete
189832388%No
1899365100%Yes
190036099%Yes
190136099%Yes
190235998%Yes
1903364100%Yes
190436199%Yes
190535597%Yes
1906365100%Yes
190736299%Yes
190836098%Yes
190936299%Yes
191036399%Yes
191136299%Yes
191236299%Yes
1913365100%Yes
191436299%Yes
191536299%Yes
191636098%Yes
191733090%Yes
191836399%Yes
191936099%Yes
1920366100%Yes
1921364100%Yes
1922364100%Yes
1923364100%Yes
1924366100%Yes
1925364100%Yes
1926365100%Yes
192736199%Yes
192835597%Yes
1929364100%Yes
1930364100%Yes
1931364100%Yes
1932365100%Yes
1933364100%Yes
1934364100%Yes
1935364100%Yes
1936365100%Yes
1937365100%Yes
1938364100%Yes
193914941%No

Latest Records

20
Latest records at Lenox
DateStationRecordValueBeat old record byOld record stoodSignificance
9 September 1951Lenox, USdaily rain41.7 mm (1.6 in)23.2 mm (0.9 in)36 years29 of 100 (Routine)
25 August 1951Lenox, USdaily rain37.1 mm (1.5 in)18.0 mm (0.7 in)48 years30 of 100 (Routine)
14 August 1951Lenox, USdaily rain42.4 mm (1.7 in)8.1 mm (0.32 in)18 years15 of 100 (Routine)
10 May 1951Lenox, USdaily rain30.7 mm (1.2 in)9.1 mm (0.36 in)29 years20 of 100 (Routine)
30 April 1951Lenox, USdaily rain36.6 mm (1.4 in)11.2 mm (0.4 in)34 years24 of 100 (Routine)
28 March 1951Lenox, USdaily rain30.5 mm (1.2 in)10.4 mm (0.4 in)44 years32 of 100 (Routine)
25 February 1951Lenox, USdaily rain27.7 mm (1.1 in)20.1 mm (0.8 in)16 years40 of 100 (Notable)
24 February 1951Lenox, USdaily rain35.6 mm (1.4 in)25.4 mm (1.0 in)16 years49 of 100 (Notable)
15 February 1951Lenox, USdaily rain3.0 mm (0.12 in)1.7 mm (0.07 in)53 years20 of 100 (Routine)
2 October 1950Lenox, USdaily rain11.9 mm (0.5 in)3.0 mm (0.12 in)47 years20 of 100 (Routine)
17 July 1950Lenox, USdaily rain33.5 mm (1.3 in)7.3 mm (0.29 in)52 years24 of 100 (Routine)
8 May 1950Lenox, USmonthly rain126.0 mm (5.0 in)50.6 mm (2.0 in)33 years65 of 100 (Major)
25 January 1950Lenox, USdaily rain11.7 mm (0.5 in)6.6 mm (0.26 in)48 years20 of 100 (Routine)
13 January 1950Lenox, USdaily rain6.6 mm (0.26 in)1.5 mm (0.06 in)28 years16 of 100 (Routine)
20 October 1949Lenox, USdaily rain27.9 mm (1.1 in)8.8 mm (0.35 in)40 years23 of 100 (Routine)
23 June 1949Lenox, USdaily rain35.8 mm (1.4 in)6.3 mm (0.25 in)53 years25 of 100 (Routine)
1 June 1949Lenox, USdaily rain86.4 mm (3.4 in)43.2 mm (1.7 in)20 years41 of 100 (Notable)
26 March 1949Lenox, USdaily rain17.8 mm (0.7 in)7.6 mm (0.30 in)43 years20 of 100 (Routine)
21 March 1949Lenox, USdaily rain17.0 mm (0.7 in)10.6 mm (0.4 in)38 years20 of 100 (Routine)
12 February 1949Lenox, USdaily rain15.2 mm (0.6 in)5.0 mm (0.20 in)41 years20 of 100 (Routine)

Climate Trend

39 complete years, 1899 to 1938
Annual mean temperature at Lenox as warming stripes, 1899 to 1938 One stripe for each of 39 complete years at Lenox, 1899 to 1938. Blue stripes are years cooler than the station's own mean of 10.4 C (50.7 F); red stripes are warmer. The coolest year was 1904, at 8.7 C (47.6 F), and the warmest was 1931, at 13.1 C (55.5 F). The strongest colour marks a difference of 2.7 C (4.9 F). 1899: 9.3 C, -1.2 C from the station mean1900: 10.3 C, -0.1 C from the station mean1901: 10.0 C, -0.4 C from the station mean1902: 9.1 C, -1.3 C from the station mean1903: 9.2 C, -1.2 C from the station mean1904: 8.7 C, -1.7 C from the station mean1905: 9.1 C, -1.3 C from the station mean1906: 10.0 C, -0.5 C from the station mean1907: 9.7 C, -0.7 C from the station mean1908: 10.4 C, 0.0 C from the station mean1909: 9.4 C, -1.0 C from the station mean1910: 10.2 C, -0.2 C from the station mean1911: 10.9 C, +0.5 C from the station mean1912: 8.8 C, -1.7 C from the station mean1913: 10.9 C, +0.5 C from the station mean1914: 10.6 C, +0.2 C from the station mean1915: 9.7 C, -0.7 C from the station mean1916: 9.7 C, -0.7 C from the station mean1918: 11.0 C, +0.6 C from the station mean1919: 10.4 C, 0.0 C from the station mean1920: 10.2 C, -0.2 C from the station mean1921: 12.3 C, +1.9 C from the station mean1922: 11.0 C, +0.6 C from the station mean1923: 10.6 C, +0.1 C from the station mean1924: 9.1 C, -1.3 C from the station mean1925: 10.5 C, 0.0 C from the station mean1926: 10.2 C, -0.2 C from the station mean1927: 10.5 C, +0.1 C from the station mean1928: 10.8 C, +0.4 C from the station mean1929: 9.2 C, -1.2 C from the station mean1930: 11.6 C, +1.2 C from the station mean1931: 13.1 C, +2.6 C from the station mean1932: 10.5 C, +0.1 C from the station mean1933: 12.1 C, +1.7 C from the station mean1934: 12.6 C, +2.2 C from the station mean1935: 10.8 C, +0.4 C from the station mean1936: 11.0 C, +0.6 C from the station mean1937: 10.2 C, -0.2 C from the station mean1938: 12.4 C, +2.0 C from the station mean18991905191019151920192519301935
One stripe for each of 39 complete years at Lenox, 1899 to 1938. Blue stripes are years cooler than the station's own mean of 10.4 C (50.7 F); red stripes are warmer. The coolest year was 1904, at 8.7 C (47.6 F), and the warmest was 1931, at 13.1 C (55.5 F). The strongest colour marks a difference of 2.7 C (4.9 F).
Annual mean temperature at Lenox as warming stripes, 1899 to 1938
YearAnnual mean temperatureDifference from the station mean
18999.3 C-1.15 C
190010.3 C-0.11 C
190110.0 C-0.44 C
19029.1 C-1.34 C
19039.2 C-1.20 C
19048.7 C-1.74 C
19059.1 C-1.30 C
190610.0 C-0.45 C
19079.7 C-0.72 C
190810.4 C-0.02 C
19099.4 C-0.99 C
191010.2 C-0.17 C
191110.9 C+0.53 C
19128.8 C-1.65 C
191310.9 C+0.48 C
191410.6 C+0.24 C
19159.7 C-0.66 C
19169.7 C-0.73 C
191811.0 C+0.59 C
191910.4 C-0.02 C
192010.2 C-0.23 C
192112.3 C+1.91 C
192211.0 C+0.60 C
192310.6 C+0.15 C
19249.1 C-1.30 C
192510.5 C+0.05 C
192610.2 C-0.17 C
192710.5 C+0.09 C
192810.8 C+0.38 C
19299.2 C-1.24 C
193011.6 C+1.19 C
193113.1 C+2.65 C
193210.5 C+0.10 C
193312.1 C+1.70 C
193412.6 C+2.20 C
193510.8 C+0.43 C
193611.0 C+0.59 C
193710.2 C-0.16 C
193812.4 C+2.02 C

The annual mean temperature here has risen by 0.6 C (0.3 to 0.8) per decade over 1899 to 1938. In Fahrenheit: 1.0 F (0.6 to 1.4) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Lenox
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.6 C (0.3 to 0.8) per decade1.0 F (0.6 to 1.4) per decade1899 to 193839Rise
Mean daily maximum0.8 C (0.6 to 1.1) per decade1.5 F (1.0 to 2.0) per decade1899 to 193839Rise
Mean daily minimum0.3 C (0.1 to 0.5) per decade0.5 F (0.1 to 0.9) per decade1899 to 193839Rise

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

1895 to 1951
Yearly extremes at Lenox: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)46.1 C (115.0 F)193636.7 C (98.1 F)42
Coldest night (TNn)-38.3 C (-36.9 F)1905-26.7 C (-16.1 F)42
Wettest day (Rx1day)168.9 mm (6.6 in)190361.0 mm (2.4 in)49
Wettest five days (Rx5day)193.3 mm (7.6 in)190392.0 mm (3.6 in)49
Longest dry spell (CDD)44 days191326 days49

Hottest day (TXx)

Hottest day (TXx) at Lenox by year The hottest day of the year at Lenox, 1895 to 1951. The record is 46.1 C (115.0 F) in 1936, marked on the chart; the median year is 36.7 C (98.1 F). 3035404550190019101920193019401950Record: 46.1 C (115.0 F) in 1936
The hottest day of the year at Lenox, 1895 to 1951. The record is 46.1 C (115.0 F) in 1936, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Lenox by year
YearHottest day (TXx)
1895n/a
1896n/a
1897n/a
189835.6 C (96.1 F)
189935.0 C (95.0 F)
190034.4 C (93.9 F)
190140.0 C (104.0 F)
190232.8 C (91.0 F)
190333.3 C (91.9 F)
190432.2 C (90.0 F)
190535.0 C (95.0 F)
190634.4 C (93.9 F)
190734.4 C (93.9 F)
190833.9 C (93.0 F)
190935.6 C (96.1 F)
191036.1 C (97.0 F)
191143.3 C (109.9 F)
191236.7 C (98.1 F)
191338.9 C (102.0 F)
191438.9 C (102.0 F)
191532.8 C (91.0 F)
191636.7 C (98.1 F)
191740.0 C (104.0 F)
191842.2 C (108.0 F)
191937.2 C (99.0 F)
192035.6 C (96.1 F)
192136.7 C (98.1 F)
192237.8 C (100.0 F)
192337.2 C (99.0 F)
192435.6 C (96.1 F)
192538.3 C (100.9 F)
192639.4 C (102.9 F)
192736.7 C (98.1 F)
192835.6 C (96.1 F)
192936.7 C (98.1 F)
193041.7 C (107.1 F)
193142.8 C (109.0 F)
193240.0 C (104.0 F)
193340.6 C (105.1 F)
193445.0 C (113.0 F)
193541.7 C (107.1 F)
193646.1 C (115.0 F)
193740.6 C (105.1 F)
193839.4 C (102.9 F)
193936.1 C (97.0 F)
1948n/a
1949n/a
1950n/a
1951n/a

Coldest night (TNn)

Coldest night (TNn) at Lenox by year The coldest night of the year at Lenox, 1895 to 1951. The record is -38.3 C (-36.9 F) in 1905, marked on the chart; the median year is -26.7 C (-16.1 F). -40-35-30-25-20-15190019101920193019401950Record: -38.3 C (-36.9 F) in 1905
The coldest night of the year at Lenox, 1895 to 1951. The record is -38.3 C (-36.9 F) in 1905, marked on the chart; the median year is -26.7 C (-16.1 F).
Coldest night (TNn) at Lenox by year
YearColdest night (TNn)
1895n/a
1896n/a
1897n/a
1898-26.1 C (-15.0 F)
1899-33.9 C (-29.0 F)
1900-24.4 C (-11.9 F)
1901-30.6 C (-23.1 F)
1902-31.1 C (-24.0 F)
1903-27.2 C (-17.0 F)
1904-29.4 C (-20.9 F)
1905-38.3 C (-36.9 F)
1906-23.3 C (-9.9 F)
1907-26.7 C (-16.1 F)
1908-25.0 C (-13.0 F)
1909-27.2 C (-17.0 F)
1910-26.7 C (-16.1 F)
1911-27.2 C (-17.0 F)
1912-35.0 C (-31.0 F)
1913-25.6 C (-14.1 F)
1914-26.7 C (-16.1 F)
1915-28.3 C (-18.9 F)
1916-31.1 C (-24.0 F)
1917-30.0 C (-22.0 F)
1918-31.1 C (-24.0 F)
1919-29.4 C (-20.9 F)
1920-22.8 C (-9.0 F)
1921-20.0 C (-4.0 F)
1922-21.1 C (-6.0 F)
1923-23.3 C (-9.9 F)
1924-31.7 C (-25.1 F)
1925-23.9 C (-11.0 F)
1926-25.0 C (-13.0 F)
1927-24.4 C (-11.9 F)
1928-23.9 C (-11.0 F)
1929-26.7 C (-16.1 F)
1930-30.0 C (-22.0 F)
1931-19.4 C (-2.9 F)
1932-27.2 C (-17.0 F)
1933-28.9 C (-20.0 F)
1934-23.3 C (-9.9 F)
1935-25.0 C (-13.0 F)
1936-28.9 C (-20.0 F)
1937-21.7 C (-7.1 F)
1938-20.0 C (-4.0 F)
1939-23.3 C (-9.9 F)
1948n/a
1949n/a
1950n/a
1951n/a

Wettest day (Rx1day)

Wettest day (Rx1day) at Lenox by year The wettest day of the year at Lenox, 1895 to 1951. The record is 168.9 mm (6.6 in) in 1903, marked on the chart; the median year is 61.0 mm (2.4 in). 050100150200190019101920193019401950Record: 168.9 mm (6.6 in) in 1903
The wettest day of the year at Lenox, 1895 to 1951. The record is 168.9 mm (6.6 in) in 1903, marked on the chart; the median year is 61.0 mm (2.4 in).
Wettest day (Rx1day) at Lenox by year
YearWettest day (Rx1day)
189566.3 mm (2.6 in)
189652.1 mm (2.1 in)
189773.4 mm (2.9 in)
189850.3 mm (2.0 in)
189952.1 mm (2.1 in)
1900106.7 mm (4.2 in)
190190.2 mm (3.6 in)
190268.6 mm (2.7 in)
1903168.9 mm (6.6 in)
190455.1 mm (2.2 in)
190552.8 mm (2.1 in)
190640.6 mm (1.6 in)
190772.4 mm (2.9 in)
190863.5 mm (2.5 in)
190999.1 mm (3.9 in)
191067.3 mm (2.6 in)
191138.4 mm (1.5 in)
191250.8 mm (2.0 in)
191349.8 mm (2.0 in)
1914121.2 mm (4.8 in)
191599.1 mm (3.9 in)
191675.4 mm (3.0 in)
191762.7 mm (2.5 in)
1918121.9 mm (4.8 in)
191996.5 mm (3.8 in)
192047.0 mm (1.9 in)
192157.2 mm (2.3 in)
192265.0 mm (2.6 in)
192335.8 mm (1.4 in)
192442.2 mm (1.7 in)
192549.3 mm (1.9 in)
192695.0 mm (3.7 in)
192743.2 mm (1.7 in)
192882.6 mm (3.3 in)
192943.2 mm (1.7 in)
193061.0 mm (2.4 in)
193192.7 mm (3.6 in)
1932113.0 mm (4.4 in)
193381.3 mm (3.2 in)
193444.5 mm (1.8 in)
193547.8 mm (1.9 in)
193645.7 mm (1.8 in)
193737.6 mm (1.5 in)
193858.7 mm (2.3 in)
193933.0 mm (1.3 in)
194838.4 mm (1.5 in)
194986.4 mm (3.4 in)
1950126.0 mm (5.0 in)
195145.5 mm (1.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Lenox by year The wettest five days of the year at Lenox, 1895 to 1951. The record is 193.3 mm (7.6 in) in 1903, marked on the chart; the median year is 92.0 mm (3.6 in). 050100150200190019101920193019401950Record: 193.3 mm (7.6 in) in 1903
The wettest five days of the year at Lenox, 1895 to 1951. The record is 193.3 mm (7.6 in) in 1903, marked on the chart; the median year is 92.0 mm (3.6 in).
Wettest five days (Rx5day) at Lenox by year
YearWettest five days (Rx5day)
189595.5 mm (3.8 in)
1896129.5 mm (5.1 in)
1897125.9 mm (5.0 in)
189869.6 mm (2.7 in)
189997.5 mm (3.8 in)
1900136.0 mm (5.4 in)
190196.7 mm (3.8 in)
1902105.7 mm (4.2 in)
1903193.3 mm (7.6 in)
190485.6 mm (3.4 in)
1905130.3 mm (5.1 in)
190661.0 mm (2.4 in)
190789.7 mm (3.5 in)
1908153.2 mm (6.0 in)
1909160.0 mm (6.3 in)
191080.1 mm (3.2 in)
191183.1 mm (3.3 in)
191275.0 mm (3.0 in)
191373.4 mm (2.9 in)
1914175.6 mm (6.9 in)
1915156.5 mm (6.2 in)
1916104.7 mm (4.1 in)
1917147.0 mm (5.8 in)
1918128.5 mm (5.1 in)
1919148.6 mm (5.9 in)
192056.1 mm (2.2 in)
192191.4 mm (3.6 in)
1922111.8 mm (4.4 in)
192372.9 mm (2.9 in)
192473.9 mm (2.9 in)
192581.6 mm (3.2 in)
1926171.2 mm (6.7 in)
192759.2 mm (2.3 in)
1928156.5 mm (6.2 in)
192974.9 mm (2.9 in)
193067.9 mm (2.7 in)
1931122.9 mm (4.8 in)
1932167.1 mm (6.6 in)
193381.3 mm (3.2 in)
193469.0 mm (2.7 in)
193583.2 mm (3.3 in)
1936118.1 mm (4.6 in)
193766.8 mm (2.6 in)
193883.6 mm (3.3 in)
193958.4 mm (2.3 in)
194843.2 mm (1.7 in)
194992.0 mm (3.6 in)
1950142.8 mm (5.6 in)
195171.4 mm (2.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Lenox by year The longest dry spell of the year at Lenox, 1895 to 1951. The record is 44 days in 1913, marked on the chart; the median year is 26 days. 1020304050190019101920193019401950Record: 44 days in 1913
The longest dry spell of the year at Lenox, 1895 to 1951. The record is 44 days in 1913, marked on the chart; the median year is 26 days.
Longest dry spell (CDD) at Lenox by year
YearLongest dry spell (CDD)
189531 days
189621 days
189723 days
189826 days
189932 days
190028 days
190129 days
190223 days
190337 days
190433 days
190523 days
190631 days
190725 days
190825 days
190916 days
191038 days
191121 days
191229 days
191344 days
191423 days
191524 days
191623 days
191733 days
191819 days
191932 days
192022 days
192134 days
192217 days
192326 days
192424 days
192526 days
192619 days
192731 days
192822 days
192918 days
193030 days
193129 days
193220 days
193332 days
193434 days
193518 days
193624 days
193723 days
193827 days
193919 days
194827 days
194926 days
195026 days
195117 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

39 years with a frost

Across 39 years with a frost, the median last spring frost at Lenox falls on 27 April and the median first autumn frost on 11 October, which leaves a median of 168 days between them.

Fitted over all years, the growing season changes by +2.0 days per decade at this station.

Frost dates and growing season at Lenox
MeasureMedian, all yearsEarliest periodRecent period (1908 to 1938)Recent against earliestFitted trend
Last spring frost27 Apriln/a27 Apriln/a+0.2 days per decade
First autumn frost11 Octobern/a12 Octobern/a+2.2 days per decade
Growing days168 daysn/a169 daysn/a+2.0 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

44 years, 1896 to 1949

A day with at least 62.6 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 178.6 mm (7.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Lenox: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years62.6 mm (2.5 in)
5 years87.3 mm (3.4 in)
10 years105.9 mm (4.2 in)
25 years132.4 mm (5.2 in)
50 years154.5 mm (6.1 in)Longer than the 44 years of record
100 years178.6 mm (7.0 in)Longer than the 44 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, 44 years of values from 1896 to 1949.

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: 168.9 mm (6.6 in) in 1903; 121.9 mm (4.8 in) in 1918; 121.2 mm (4.8 in) in 1914.

Download the Data

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