Built 2026-10-17 (17 October 2026)

Aetna 2 S Weather Records (USC00140069)

Record envelope, standing records and threshold days for Aetna 2 S (USC00140069), Kansas, United States, with 48 years of record.

Key Facts for Aetna 2 S

  • Aetna 2 S (USC00140069) is a weather station in Kansas, United States at 37.07 latitude and -98.97 longitude, 479 m (1,572 ft) above sea level.
  • The station reports from 1938 to 1985, 48 years of record.
  • 1,464 records set at Aetna 2 S still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Aetna 2 S set a monthly record daily precipitation of 40.1 mm (1.6 in) on 16 December 1984.

About the Station

  • Location: Kansas, United States, 37.07 latitude, -98.97 longitude.
  • Elevation: 479 m (1,572 ft).
  • Period of record: 1938 to 1985, 48 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 Aetna 2 S, with 2026 drawn through them The band shows the record high and record low for each calendar day at Aetna 2 S. 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 Aetna 2 S. 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 Aetna 2 S, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan27.2 C (81.0 F)-27.2 C (-17.0 F)n/an/a
Feb33.3 C (91.9 F)-26.1 C (-15.0 F)n/an/a
Mar33.9 C (93.0 F)-23.3 C (-9.9 F)n/an/a
Apr36.7 C (98.1 F)-10.0 C (14.0 F)n/an/a
May38.9 C (102.0 F)-1.7 C (28.9 F)n/an/a
Jun42.8 C (109.0 F)5.0 C (41.0 F)n/an/a
Jul43.9 C (111.0 F)9.4 C (48.9 F)n/an/a
Aug46.1 C (115.0 F)7.8 C (46.0 F)n/an/a
Sep42.2 C (108.0 F)-4.4 C (24.1 F)n/an/a
Oct36.1 C (97.0 F)-8.3 C (17.1 F)n/an/a
Nov32.8 C (91.0 F)-15.6 C (3.9 F)n/an/a
Dec26.7 C (80.1 F)-26.1 C (-15.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Aetna 2 S by the year they were set 1,464 records at Aetna 2 S still stand. 1966 holds the most, with 77. 0204060801959: 401960: 591961: 431962: 561963: 721964: 701965: 451966: 771967: 651968: 401969: 401970: 701971: 531972: 621973: 481974: 541975: 521976: 561977: 391978: 751979: 461980: 651981: 601982: 531983: 761984: 48195919621965196819711974197719801983
1,464 records at Aetna 2 S still stand. 1966 holds the most, with 77.
Standing records at Aetna 2 S by the year they were set
Year setStanding records
195940
196059
196143
196256
196372
196470
196545
196677
196765
196840
196940
197070
197153
197262
197348
197454
197552
197656
197739
197875
197946
198065
198160
198253
198376
198448

All-Time Record Progression

1 new records
When Aetna 2 S set new all-time records 1 all-time records were set at Aetna 2 S between 11 October 1973 and 11 October 1973. Each dot is a new record. Record daily precipitation11 October 1973: Record daily precipitation 112.5 mm (4.4 in)
1 all-time records were set at Aetna 2 S between 11 October 1973 and 11 October 1973. Each dot is a new record.
When Aetna 2 S set new all-time records
DateKindDetail
1973-10-11Record daily precipitationRecord daily precipitation 112.5 mm (4.4 in)

Wettest Day of Each Month

Oct: 112.5 mm (4.4 in)
Record daily precipitation for each month at Aetna 2 S The wettest day on record for each calendar month at Aetna 2 S. The most was 112.5 mm (4.4 in) on 11 October 1973. 050100150 Jan: 37.1 mm (1.5 in), 11 January 1949 Jan Feb: 29.0 mm (1.1 in), 5 February 1971 Feb Mar: 39.1 mm (1.5 in), 15 March 1945 Mar Apr: 52.8 mm (2.1 in), 15 April 1941 Apr May: 91.7 mm (3.6 in), 10 May 1979 May Jun: 82.3 mm (3.2 in), 25 June 1958 Jun Jul: 92.2 mm (3.6 in), 31 July 1981 Jul Aug: 98.6 mm (3.9 in), 25 August 1969 Aug Sep: 111.8 mm (4.4 in), 28 September 1945 Sep Oct: 112.5 mm (4.4 in), 11 October 1973 Oct Nov: 54.4 mm (2.1 in), 2 November 1975 Nov Dec: 40.1 mm (1.6 in), 16 December 1984 Dec
The wettest day on record for each calendar month at Aetna 2 S. The most was 112.5 mm (4.4 in) on 11 October 1973.
Record daily precipitation for each month at Aetna 2 S
MonthRecord daily precipitation (mm)Date
Jan37.1 mm (1.5 in)11 January 1949
Feb29.0 mm (1.1 in)5 February 1971
Mar39.1 mm (1.5 in)15 March 1945
Apr52.8 mm (2.1 in)15 April 1941
May91.7 mm (3.6 in)10 May 1979
Jun82.3 mm (3.2 in)25 June 1958
Jul92.2 mm (3.6 in)31 July 1981
Aug98.6 mm (3.9 in)25 August 1969
Sep111.8 mm (4.4 in)28 September 1945
Oct112.5 mm (4.4 in)11 October 1973
Nov54.4 mm (2.1 in)2 November 1975
Dec40.1 mm (1.6 in)16 December 1984

Period of Record Coverage

1959 to 1985
Days with data per year at Aetna 2 S 27 years of record at Aetna 2 S, 1959 to 1985. 4 years have data for under 90 percent of days and are left out of rankings: 1959, 1962, 1967, 1985. 1959: 240 of 365 days1960: 360 of 366 days1961: 354 of 365 days1962: 325 of 365 days1963: 359 of 365 days1964: 364 of 366 days1965: 347 of 365 days1966: 357 of 365 days1967: 278 of 365 days1968: 342 of 366 days1969: 331 of 365 days1970: 356 of 365 days1971: 360 of 365 days1972: 362 of 366 days1973: 330 of 365 days1974: 356 of 365 days1975: 360 of 365 days1976: 363 of 366 days1977: 365 of 365 days1978: 358 of 365 days1979: 360 of 365 days1980: 361 of 366 days1981: 356 of 365 days1982: 358 of 365 days1983: 365 of 365 days1984: 365 of 366 days1985: 27 of 365 days196019651970197519801985
27 years of record at Aetna 2 S, 1959 to 1985. 4 years have data for under 90 percent of days and are left out of rankings: 1959, 1962, 1967, 1985.
Days with data per year at Aetna 2 S
YearDays with dataShare of yearComplete
195924066%No
196036098%Yes
196135497%Yes
196232589%No
196335998%Yes
196436499%Yes
196534795%Yes
196635798%Yes
196727876%No
196834293%Yes
196933191%Yes
197035698%Yes
197136099%Yes
197236299%Yes
197333090%Yes
197435698%Yes
197536099%Yes
197636399%Yes
1977365100%Yes
197835898%Yes
197936099%Yes
198036199%Yes
198135698%Yes
198235898%Yes
1983365100%Yes
1984365100%Yes
1985277%No

Latest Records

20
Latest records at Aetna 2 S
DateStationRecordValueBeat old record byOld record stoodSignificance
16 December 1984Aetna 2 S, USmonthly rain40.1 mm (1.6 in)5.6 mm (0.22 in)41 years32 of 100 (Routine)
5 December 1984Aetna 2 S, USdaily snowfall12.7 cm (5.0 in)7.6 cm (3.0 in)40 years33 of 100 (Routine)
19 November 1984Aetna 2 S, USdaily rain10.9 mm (0.4 in)0.2 mm (0.01 in)31 years13 of 100 (Routine)
18 November 1984Aetna 2 S, USdaily rain31.0 mm (1.2 in)13.2 mm (0.5 in)27 years26 of 100 (Routine)
1 November 1984Aetna 2 S, USdaily rain41.4 mm (1.6 in)2.0 mm (0.08 in)3 years6 of 100 (Routine)
5 October 1984Aetna 2 S, USdaily rain (Tie)10.7 mm (0.4 in)tie16 years2 of 100 (Routine)
17 September 1984Aetna 2 S, USdaily rain5.8 mm (0.23 in)2.0 mm (0.08 in)25 years12 of 100 (Routine)
31 March 1984Aetna 2 S, USdaily snowfall1.3 cm (0.5 in)1.3 cm (0.5 in)41 years18 of 100 (Routine)
31 March 1984Aetna 2 S, USdaily snow depth2.5 cm (1.0 in)2.5 cm (1.0 in)35 years18 of 100 (Routine)
24 March 1984Aetna 2 S, USdaily snowfall12.7 cm (5.0 in)11.4 cm (4.5 in)4 years23 of 100 (Routine)
19 March 1984Aetna 2 S, USdaily snowfall5.1 cm (2.0 in)2.6 cm (1.0 in)1 year8 of 100 (Routine)
17 March 1984Aetna 2 S, USdaily rain21.3 mm (0.8 in)1.0 mm (0.04 in)23 years11 of 100 (Routine)
21 January 1984Aetna 2 S, USdaily snow depth7.6 cm (3.0 in)2.5 cm (1.0 in)5 years12 of 100 (Routine)
20 January 1984Aetna 2 S, USdaily snow depth (Tie)10.2 cm (4.0 in)tie17 years2 of 100 (Routine)
18 January 1984Aetna 2 S, USdaily snowfall7.6 cm (3.0 in)5.1 cm (2.0 in)38 years30 of 100 (Routine)
18 January 1984Aetna 2 S, USdaily snow depth (Tie)10.2 cm (4.0 in)tie21 years2 of 100 (Routine)
16 January 1984Aetna 2 S, USdaily snow depth (Tie)5.1 cm (2.0 in)tie26 years3 of 100 (Routine)
12 January 1984Aetna 2 S, USdaily snowfall1.3 cm (0.5 in)1.3 cm (0.5 in)44 years20 of 100 (Routine)
22 December 1983Aetna 2 S, USdaily snowfall1.3 cm (0.5 in)1.3 cm (0.5 in)44 years20 of 100 (Routine)
22 December 1983Aetna 2 S, USdaily snow depth (Tie)7.6 cm (3.0 in)tie33 years3 of 100 (Routine)

Climate Trend

21 complete years, 1961 to 1984
Annual mean temperature at Aetna 2 S as warming stripes, 1961 to 1984 One stripe for each of 21 complete years at Aetna 2 S, 1961 to 1984. 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 1983, at 13.2 C (55.8 F), and the warmest was 1977, at 15.2 C (59.3 F). The strongest colour marks a difference of 1.0 C (1.8 F). 1961: 13.5 C, -0.7 C from the station mean1963: 15.2 C, +1.0 C from the station mean1964: 14.8 C, +0.6 C from the station mean1965: 14.8 C, +0.6 C from the station mean1966: 14.1 C, -0.1 C from the station mean1968: 13.9 C, -0.3 C from the station mean1969: 14.1 C, -0.1 C from the station mean1970: 14.4 C, +0.2 C from the station mean1971: 14.2 C, 0.0 C from the station mean1972: 14.0 C, -0.2 C from the station mean1974: 14.3 C, +0.1 C from the station mean1975: 14.0 C, -0.1 C from the station mean1976: 14.3 C, +0.1 C from the station mean1977: 15.2 C, +1.0 C from the station mean1978: 13.6 C, -0.6 C from the station mean1979: 13.3 C, -0.9 C from the station mean1980: 14.9 C, +0.7 C from the station mean1981: 15.1 C, +0.9 C from the station mean1982: 13.3 C, -0.9 C from the station mean1983: 13.2 C, -1.0 C from the station mean1984: 13.9 C, -0.3 C from the station mean196119641966196819701972197419761978198019821984
One stripe for each of 21 complete years at Aetna 2 S, 1961 to 1984. 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 1983, at 13.2 C (55.8 F), and the warmest was 1977, at 15.2 C (59.3 F). The strongest colour marks a difference of 1.0 C (1.8 F).
Annual mean temperature at Aetna 2 S as warming stripes, 1961 to 1984
YearAnnual mean temperatureDifference from the station mean
196113.5 C-0.71 C
196315.2 C+0.98 C
196414.8 C+0.59 C
196514.8 C+0.57 C
196614.1 C-0.09 C
196813.9 C-0.27 C
196914.1 C-0.10 C
197014.4 C+0.20 C
197114.2 C+0.03 C
197214.0 C-0.18 C
197414.3 C+0.08 C
197514.0 C-0.15 C
197614.3 C+0.09 C
197715.2 C+0.98 C
197813.6 C-0.63 C
197913.3 C-0.90 C
198014.9 C+0.66 C
198115.1 C+0.86 C
198213.3 C-0.89 C
198313.2 C-0.96 C
198413.9 C-0.26 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

1938 to 1985
Yearly extremes at Aetna 2 S: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)46.1 C (115.0 F)196441.7 C (107.1 F)27
Coldest night (TNn)-27.2 C (-17.0 F)1974-22.2 C (-8.0 F)27
Wettest day (Rx1day)112.5 mm (4.4 in)197358.2 mm (2.3 in)48
Wettest five days (Rx5day)171.4 mm (6.7 in)194190.4 mm (3.6 in)48
Longest dry spell (CDD)83 days197240 days48

Hottest day (TXx)

Hottest day (TXx) at Aetna 2 S by year The hottest day of the year at Aetna 2 S, 1938 to 1985. The record is 46.1 C (115.0 F) in 1964, marked on the chart; the median year is 41.7 C (107.1 F). 102030405019401950196019701980Record: 46.1 C (115.0 F) in 1964
The hottest day of the year at Aetna 2 S, 1938 to 1985. The record is 46.1 C (115.0 F) in 1964, marked on the chart; the median year is 41.7 C (107.1 F).
Hottest day (TXx) at Aetna 2 S 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
195942.2 C (108.0 F)
196041.7 C (107.1 F)
196140.6 C (105.1 F)
196243.3 C (109.9 F)
196341.7 C (107.1 F)
196446.1 C (115.0 F)
196538.9 C (102.0 F)
196642.2 C (108.0 F)
196740.0 C (104.0 F)
196842.8 C (109.0 F)
196940.6 C (105.1 F)
197042.8 C (109.0 F)
197142.2 C (108.0 F)
197239.4 C (102.9 F)
197341.1 C (106.0 F)
197442.2 C (108.0 F)
197540.6 C (105.1 F)
197643.3 C (109.9 F)
197741.7 C (107.1 F)
197843.9 C (111.0 F)
197939.4 C (102.9 F)
198044.4 C (111.9 F)
198143.3 C (109.9 F)
198241.7 C (107.1 F)
198341.7 C (107.1 F)
198443.3 C (109.9 F)
198514.4 C (57.9 F)

Coldest night (TNn)

Coldest night (TNn) at Aetna 2 S by year The coldest night of the year at Aetna 2 S, 1938 to 1985. The record is -27.2 C (-17.0 F) in 1974, marked on the chart; the median year is -22.2 C (-8.0 F). -30-25-20-15-1019401950196019701980Record: -27.2 C (-17.0 F) in 1974
The coldest night of the year at Aetna 2 S, 1938 to 1985. The record is -27.2 C (-17.0 F) in 1974, marked on the chart; the median year is -22.2 C (-8.0 F).
Coldest night (TNn) at Aetna 2 S 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
1959-14.4 C (6.1 F)
1960-23.3 C (-9.9 F)
1961-21.1 C (-6.0 F)
1962-23.3 C (-9.9 F)
1963-22.8 C (-9.0 F)
1964-20.0 C (-4.0 F)
1965-16.7 C (1.9 F)
1966-22.8 C (-9.0 F)
1967-19.4 C (-2.9 F)
1968-19.4 C (-2.9 F)
1969-15.0 C (5.0 F)
1970-19.4 C (-2.9 F)
1971-22.2 C (-8.0 F)
1972-26.1 C (-15.0 F)
1973-22.2 C (-8.0 F)
1974-27.2 C (-17.0 F)
1975-17.2 C (1.0 F)
1976-22.2 C (-8.0 F)
1977-18.9 C (-2.0 F)
1978-22.8 C (-9.0 F)
1979-23.9 C (-11.0 F)
1980-18.9 C (-2.0 F)
1981-21.1 C (-6.0 F)
1982-26.1 C (-15.0 F)
1983-26.1 C (-15.0 F)
1984-25.0 C (-13.0 F)
1985-19.4 C (-2.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Aetna 2 S by year The wettest day of the year at Aetna 2 S, 1938 to 1985. The record is 112.5 mm (4.4 in) in 1973, marked on the chart; the median year is 58.2 mm (2.3 in). 05010015019401950196019701980Record: 112.5 mm (4.4 in) in 1973
The wettest day of the year at Aetna 2 S, 1938 to 1985. The record is 112.5 mm (4.4 in) in 1973, marked on the chart; the median year is 58.2 mm (2.3 in).
Wettest day (Rx1day) at Aetna 2 S by year
YearWettest day (Rx1day)
193863.5 mm (2.5 in)
193976.2 mm (3.0 in)
194031.8 mm (1.3 in)
1941107.4 mm (4.2 in)
194257.9 mm (2.3 in)
194340.4 mm (1.6 in)
194463.5 mm (2.5 in)
1945111.8 mm (4.4 in)
194662.5 mm (2.5 in)
194749.8 mm (2.0 in)
194878.5 mm (3.1 in)
194977.5 mm (3.1 in)
195047.2 mm (1.9 in)
195177.7 mm (3.1 in)
195250.8 mm (2.0 in)
195339.9 mm (1.6 in)
195445.5 mm (1.8 in)
195552.3 mm (2.1 in)
195658.7 mm (2.3 in)
195789.4 mm (3.5 in)
195882.3 mm (3.2 in)
195966.0 mm (2.6 in)
196058.4 mm (2.3 in)
196189.7 mm (3.5 in)
196240.1 mm (1.6 in)
196344.7 mm (1.8 in)
196447.5 mm (1.9 in)
196556.4 mm (2.2 in)
196625.4 mm (1.0 in)
196755.9 mm (2.2 in)
196859.2 mm (2.3 in)
196998.6 mm (3.9 in)
197038.6 mm (1.5 in)
197142.2 mm (1.7 in)
197267.3 mm (2.6 in)
1973112.5 mm (4.4 in)
197495.0 mm (3.7 in)
197554.4 mm (2.1 in)
197638.1 mm (1.5 in)
197764.3 mm (2.5 in)
197837.3 mm (1.5 in)
197991.7 mm (3.6 in)
198051.3 mm (2.0 in)
198192.2 mm (3.6 in)
198265.0 mm (2.6 in)
198354.9 mm (2.2 in)
198441.4 mm (1.6 in)
19854.8 mm (0.19 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Aetna 2 S by year The wettest five days of the year at Aetna 2 S, 1938 to 1985. The record is 171.4 mm (6.7 in) in 1941, marked on the chart; the median year is 90.4 mm (3.6 in). 05010015020019401950196019701980Record: 171.4 mm (6.7 in) in 1941
The wettest five days of the year at Aetna 2 S, 1938 to 1985. The record is 171.4 mm (6.7 in) in 1941, marked on the chart; the median year is 90.4 mm (3.6 in).
Wettest five days (Rx5day) at Aetna 2 S by year
YearWettest five days (Rx5day)
1938122.5 mm (4.8 in)
193986.4 mm (3.4 in)
194062.8 mm (2.5 in)
1941171.4 mm (6.7 in)
194271.2 mm (2.8 in)
194353.3 mm (2.1 in)
194467.1 mm (2.6 in)
1945135.8 mm (5.3 in)
194695.5 mm (3.8 in)
194793.4 mm (3.7 in)
1948139.2 mm (5.5 in)
1949147.1 mm (5.8 in)
1950135.9 mm (5.4 in)
1951139.4 mm (5.5 in)
195295.7 mm (3.8 in)
195381.9 mm (3.2 in)
195465.3 mm (2.6 in)
195595.3 mm (3.8 in)
195659.5 mm (2.3 in)
1957108.8 mm (4.3 in)
1958123.5 mm (4.9 in)
195987.6 mm (3.4 in)
196074.1 mm (2.9 in)
196194.5 mm (3.7 in)
196266.5 mm (2.6 in)
1963101.4 mm (4.0 in)
196480.9 mm (3.2 in)
196576.4 mm (3.0 in)
196652.0 mm (2.0 in)
196794.6 mm (3.7 in)
196876.0 mm (3.0 in)
1969135.9 mm (5.4 in)
197055.9 mm (2.2 in)
197172.7 mm (2.9 in)
197285.3 mm (3.4 in)
1973113.3 mm (4.5 in)
1974105.4 mm (4.1 in)
1975100.8 mm (4.0 in)
197674.7 mm (2.9 in)
197784.6 mm (3.3 in)
197876.2 mm (3.0 in)
197993.2 mm (3.7 in)
1980101.2 mm (4.0 in)
198198.3 mm (3.9 in)
198293.2 mm (3.7 in)
198385.6 mm (3.4 in)
198468.1 mm (2.7 in)
19856.1 mm (0.24 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Aetna 2 S by year The longest dry spell of the year at Aetna 2 S, 1938 to 1985. The record is 83 days in 1972, marked on the chart; the median year is 40 days. 02040608010019401950196019701980Record: 83 days in 1972
The longest dry spell of the year at Aetna 2 S, 1938 to 1985. The record is 83 days in 1972, marked on the chart; the median year is 40 days.
Longest dry spell (CDD) at Aetna 2 S by year
YearLongest dry spell (CDD)
193859 days
193954 days
194029 days
194119 days
194241 days
194332 days
194429 days
194550 days
194628 days
194739 days
194841 days
194928 days
195042 days
195133 days
195248 days
195335 days
195440 days
195564 days
195656 days
195739 days
195847 days
195938 days
196027 days
196134 days
196222 days
196336 days
196430 days
196539 days
196665 days
196726 days
196852 days
196944 days
197074 days
197156 days
197283 days
197339 days
197463 days
197546 days
197638 days
197732 days
197845 days
197952 days
198027 days
198162 days
198247 days
198346 days
198422 days
198521 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

21 years with a frost

Across 21 years with a frost, the median last spring frost at Aetna 2 S falls on 20 April and the median first autumn frost on 12 October, which leaves a median of 180 days between them.

Frost dates and growing season at Aetna 2 S
MeasureMedian, all yearsEarliest periodRecent period (1961 to 1984)Recent against earliestFitted trend
Last spring frost20 Apriln/a20 Apriln/an/a
First autumn frost12 Octobern/a12 Octobern/an/a
Growing days180 daysn/a180 daysn/an/a

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

43 years, 1939 to 1984

A day with at least 59.4 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 136.1 mm (5.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Aetna 2 S: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years59.4 mm (2.3 in)
5 years80.4 mm (3.2 in)
10 years94.0 mm (3.7 in)
25 years111.2 mm (4.4 in)
50 years123.7 mm (4.9 in)Longer than the 43 years of record
100 years136.1 mm (5.4 in)Longer than the 43 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, 43 years of values from 1939 to 1984.

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: 112.5 mm (4.4 in) in 1973; 111.8 mm (4.4 in) in 1945; 107.4 mm (4.2 in) in 1941.

Download the Data

  • Data for Aetna 2 S standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Aetna 2 S 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).