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Bunker 4N Weather Records (USC00231101)

Record envelope, standing records and threshold days for Bunker 4N (USC00231101), Missouri, United States, with 94 years of record.

Key Facts for Bunker 4N

  • Bunker 4N (USC00231101) is a weather station in Missouri, United States at 37.51 latitude and -91.19 longitude, 316 m (1,036 ft) above sea level.
  • The station reports from 1923 to 2016, 94 years of record.
  • 1,464 records set at Bunker 4N still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Bunker 4N set a daily record precipitation of 57.2 mm (2.3 in) on 20 October 2016.

About the Station

  • Location: Missouri, United States, 37.51 latitude, -91.19 longitude.
  • Elevation: 316 m (1,036 ft).
  • Period of record: 1923 to 2016, 94 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 Bunker 4N, with 2026 drawn through them The band shows the record high and record low for each calendar day at Bunker 4N. 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 Bunker 4N. 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 Bunker 4N, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan23.3 C (73.9 F)-31.7 C (-25.1 F)n/an/a
Feb26.7 C (80.1 F)-27.8 C (-18.0 F)n/an/a
Mar30.0 C (86.0 F)-19.4 C (-2.9 F)n/an/a
Apr33.3 C (91.9 F)-10.6 C (12.9 F)n/an/a
May36.7 C (98.1 F)-2.2 C (28.0 F)n/an/a
Jun37.2 C (99.0 F)1.7 C (35.1 F)n/an/a
Jul42.2 C (108.0 F)6.1 C (43.0 F)n/an/a
Aug41.1 C (106.0 F)5.0 C (41.0 F)n/an/a
Sep37.8 C (100.0 F)-1.7 C (28.9 F)n/an/a
Oct32.8 C (91.0 F)-7.8 C (18.0 F)n/an/a
Nov28.9 C (84.0 F)-17.8 C (0.0 F)n/an/a
Dec23.3 C (73.9 F)-30.0 C (-22.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Bunker 4N by the year they were set 1,464 records at Bunker 4N still stand. 1980 holds the most, with 56. 02040601963: 181964: 341965: 361966: 351967: 501968: 311969: 181970: 401971: 291972: 321973: 201974: 431975: 251976: 341977: 231978: 371979: 201980: 561981: 301982: 311983: 421984: 241985: 241986: 431987: 251988: 341989: 521990: 331991: 471992: 121994: 61995: 291996: 451997: 371998: 351999: 132000: 412001: 262002: 282003: 332004: 162005: 152006: 332007: 212008: 172009: 62010: 172011: 92012: 142013: 202014: 202015: 5196319691975198119871994200020062012
1,464 records at Bunker 4N still stand. 1980 holds the most, with 56.
Standing records at Bunker 4N by the year they were set
Year setStanding records
196318
196434
196536
196635
196750
196831
196918
197040
197129
197232
197320
197443
197525
197634
197723
197837
197920
198056
198130
198231
198342
198424
198524
198643
198725
198834
198952
199033
199147
199212
19946
199529
199645
199737
199835
199913
200041
200126
200228
200333
200416
200515
200633
200721
200817
20096
201017
20119
201214
201320
201420
20155

All-Time Record Progression

2 new records
When Bunker 4N set new all-time records 2 all-time records were set at Bunker 4N between 14 May 1983 and 7 January 2014. Each dot is a new record. Record daily precipitationRecord low maximum temperature14 May 1983: Record daily precipitation 298.2 mm (11.7 in)7 January 2014: Record low maximum temperature -16.1 C (3.0 F)1985199019952000200520102015
2 all-time records were set at Bunker 4N between 14 May 1983 and 7 January 2014. Each dot is a new record.
When Bunker 4N set new all-time records
DateKindDetail
1983-05-14Record daily precipitationRecord daily precipitation 298.2 mm (11.7 in)
2014-01-07Record low maximum temperatureRecord low maximum temperature -16.1 C (3.0 F)

Wettest Day of Each Month

May: 298.2 mm (11.7 in)
Record daily precipitation for each month at Bunker 4N The wettest day on record for each calendar month at Bunker 4N. The most was 298.2 mm (11.7 in) on 14 May 1983. 0100200300 Jan: 83.8 mm (3.3 in), 1 January 1948 Jan Feb: 152.4 mm (6.0 in), 5 February 2011 Feb Mar: 92.2 mm (3.6 in), 28 March 1977 Mar Apr: 110.2 mm (4.3 in), 3 April 1957 Apr May: 298.2 mm (11.7 in), 14 May 1983 May Jun: 108.0 mm (4.3 in), 10 June 1950 Jun Jul: 116.6 mm (4.6 in), 24 July 1973 Jul Aug: 117.3 mm (4.6 in), 7 August 2013 Aug Sep: 212.1 mm (8.4 in), 4 September 2008 Sep Oct: 86.9 mm (3.4 in), 3 October 2014 Oct Nov: 105.7 mm (4.2 in), 19 November 1985 Nov Dec: 103.4 mm (4.1 in), 10 December 1971 Dec
The wettest day on record for each calendar month at Bunker 4N. The most was 298.2 mm (11.7 in) on 14 May 1983.
Record daily precipitation for each month at Bunker 4N
MonthRecord daily precipitation (mm)Date
Jan83.8 mm (3.3 in)1 January 1948
Feb152.4 mm (6.0 in)5 February 2011
Mar92.2 mm (3.6 in)28 March 1977
Apr110.2 mm (4.3 in)3 April 1957
May298.2 mm (11.7 in)14 May 1983
Jun108.0 mm (4.3 in)10 June 1950
Jul116.6 mm (4.6 in)24 July 1973
Aug117.3 mm (4.6 in)7 August 2013
Sep212.1 mm (8.4 in)4 September 2008
Oct86.9 mm (3.4 in)3 October 2014
Nov105.7 mm (4.2 in)19 November 1985
Dec103.4 mm (4.1 in)10 December 1971

Period of Record Coverage

1963 to 2015
Days with data per year at Bunker 4N 52 years of record at Bunker 4N, 1963 to 2015. 22 years have data for under 90 percent of days and are left out of rankings: 1963, 1986, 1990, 1992, 1994, 1999, 2000, 2001 and others. 1963: 122 of 365 days1964: 365 of 366 days1965: 348 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 359 of 365 days1971: 365 of 365 days1972: 365 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 363 of 365 days1976: 366 of 366 days1977: 358 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 363 of 365 days1983: 362 of 365 days1984: 362 of 366 days1985: 329 of 365 days1986: 317 of 365 days1987: 353 of 365 days1988: 364 of 366 days1989: 362 of 365 days1990: 307 of 365 days1991: 352 of 365 days1992: 208 of 366 days1994: 121 of 365 days1995: 343 of 365 days1996: 360 of 366 days1997: 343 of 365 days1998: 348 of 365 days1999: 282 of 365 days2000: 178 of 366 days2001: 205 of 365 days2002: 272 of 365 days2003: 274 of 365 days2004: 238 of 366 days2005: 155 of 365 days2006: 209 of 365 days2007: 212 of 365 days2008: 196 of 366 days2009: 102 of 365 days2010: 185 of 365 days2011: 109 of 365 days2012: 105 of 366 days2013: 131 of 365 days2014: 86 of 365 days2015: 28 of 365 days19701980199020002010
52 years of record at Bunker 4N, 1963 to 2015. 22 years have data for under 90 percent of days and are left out of rankings: 1963, 1986, 1990, 1992, 1994, 1999, 2000, 2001 and others.
Days with data per year at Bunker 4N
YearDays with dataShare of yearComplete
196312233%No
1964365100%Yes
196534895%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
197035998%Yes
1971365100%Yes
1972365100%Yes
1973365100%Yes
1974365100%Yes
197536399%Yes
1976366100%Yes
197735898%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
198236399%Yes
198336299%Yes
198436299%Yes
198532990%Yes
198631787%No
198735397%Yes
198836499%Yes
198936299%Yes
199030784%No
199135296%Yes
199220857%No
199412133%No
199534394%Yes
199636098%Yes
199734394%Yes
199834895%Yes
199928277%No
200017849%No
200120556%No
200227275%No
200327475%No
200423865%No
200515542%No
200620957%No
200721258%No
200819654%No
200910228%No
201018551%No
201110930%No
201210529%No
201313136%No
20148624%No
2015288%No

Latest Records

20
Latest records at Bunker 4N
DateStationRecordValueBeat old record byOld record stoodSignificance
20 October 2016Bunker 4N, USdaily rain57.2 mm (2.3 in)32.6 mm (1.3 in)33 years39 of 100 (Notable)
17 September 2016Bunker 4N, USdaily rain120.7 mm (4.8 in)85.9 mm (3.4 in)48 years63 of 100 (Major)
4 June 2016Bunker 4N, USdaily rain41.1 mm (1.6 in)8.6 mm (0.34 in)31 years23 of 100 (Routine)
24 August 2015Bunker 4N, USdaily low min8.9 C (48.0 F)1.7 C (3.1 F)30 years19 of 100 (Routine)
10 August 2015Bunker 4N, USdaily rain114.3 mm (4.5 in)70.1 mm (2.8 in)74 years71 of 100 (Major)
7 July 2015Bunker 4N, USdaily rain54.6 mm (2.1 in)30.0 mm (1.2 in)28 years33 of 100 (Routine)
19 June 2015Bunker 4N, USdaily rain76.2 mm (3.0 in)25.4 mm (1.0 in)4 years27 of 100 (Routine)
22 May 2015Bunker 4N, USdaily low min1.1 C (34.0 F)1.1 C (2.0 F)13 years11 of 100 (Routine)
15 May 2015Bunker 4N, USdaily low min (Tie)1.7 C (35.1 F)tie33 years3 of 100 (Routine)
27 March 2015Bunker 4N, USdaily rain37.6 mm (1.5 in)6.6 mm (0.26 in)37 years24 of 100 (Routine)
6 March 2015Bunker 4N, USdaily snowfall9.7 cm (3.8 in)9.7 cm (3.8 in)90 years50 of 100 (Notable)
1 March 2015Bunker 4N, USdaily snowfall5.1 cm (2.0 in)2.6 cm (1.0 in)68 years32 of 100 (Routine)
21 February 2015Bunker 4N, USmonthly low min-27.8 C (-18.0 F)1.1 C (2.0 F)4 years17 of 100 (Routine)
16 February 2015Bunker 4N, USmonthly snowfall15.7 cm (6.2 in)0.5 cm (0.2 in)54 years36 of 100 (Notable)
14 February 2015Bunker 4N, USdaily high max21.1 C (70.0 F)1.7 C (3.1 F)43 years19 of 100 (Routine)
12 January 2015Bunker 4N, USdaily low min-20.6 C (-5.1 F)0.6 C (1.1 F)17 years10 of 100 (Routine)
29 October 2014Bunker 4N, USdaily high max28.3 C (82.9 F)1.1 C (2.0 F)15 years11 of 100 (Routine)
10 October 2014Bunker 4N, USdaily rain60.5 mm (2.4 in)33.8 mm (1.3 in)15 years36 of 100 (Notable)
3 October 2014Bunker 4N, USmonthly rain86.9 mm (3.4 in)11.5 mm (0.5 in)28 years35 of 100 (Notable)
17 July 2014Bunker 4N, USdaily low min8.9 C (48.0 F)2.8 C (5.0 F)12 years17 of 100 (Routine)

Climate Trend

24 complete years, 1964 to 1998
Annual mean temperature at Bunker 4N as warming stripes, 1964 to 1998 One stripe for each of 24 complete years at Bunker 4N, 1964 to 1998. Blue stripes are years cooler than the station's own mean of 13.0 C (55.4 F); red stripes are warmer. The coolest year was 1996, at 11.2 C (52.2 F), and the warmest was 1991, at 14.5 C (58.1 F). The strongest colour marks a difference of 1.8 C (3.2 F). 1964: 13.6 C, +0.6 C from the station mean1966: 12.7 C, -0.3 C from the station mean1967: 13.3 C, +0.3 C from the station mean1968: 12.8 C, -0.2 C from the station mean1969: 13.1 C, 0.0 C from the station mean1970: 13.2 C, +0.2 C from the station mean1971: 13.7 C, +0.7 C from the station mean1972: 13.1 C, +0.1 C from the station mean1973: 13.7 C, +0.7 C from the station mean1974: 13.5 C, +0.4 C from the station mean1975: 14.0 C, +1.0 C from the station mean1978: 12.4 C, -0.6 C from the station mean1979: 12.0 C, -1.0 C from the station mean1980: 13.6 C, +0.5 C from the station mean1981: 13.2 C, +0.2 C from the station mean1982: 12.4 C, -0.6 C from the station mean1983: 12.3 C, -0.7 C from the station mean1984: 13.0 C, 0.0 C from the station mean1987: 13.0 C, 0.0 C from the station mean1988: 12.2 C, -0.8 C from the station mean1989: 11.6 C, -1.4 C from the station mean1991: 14.5 C, +1.5 C from the station mean1996: 11.2 C, -1.8 C from the station mean1998: 14.1 C, +1.0 C from the station mean1964197019751980198519901995
One stripe for each of 24 complete years at Bunker 4N, 1964 to 1998. Blue stripes are years cooler than the station's own mean of 13.0 C (55.4 F); red stripes are warmer. The coolest year was 1996, at 11.2 C (52.2 F), and the warmest was 1991, at 14.5 C (58.1 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Bunker 4N as warming stripes, 1964 to 1998
YearAnnual mean temperatureDifference from the station mean
196413.6 C+0.62 C
196612.7 C-0.28 C
196713.3 C+0.29 C
196812.8 C-0.20 C
196913.1 C+0.04 C
197013.2 C+0.18 C
197113.7 C+0.72 C
197213.1 C+0.13 C
197313.7 C+0.68 C
197413.5 C+0.44 C
197514.0 C+1.03 C
197812.4 C-0.58 C
197912.0 C-0.99 C
198013.6 C+0.54 C
198113.2 C+0.15 C
198212.4 C-0.60 C
198312.3 C-0.69 C
198413.0 C-0.03 C
198713.0 C+0.00 C
198812.2 C-0.85 C
198911.6 C-1.38 C
199114.5 C+1.51 C
199611.2 C-1.78 C
199814.1 C+1.04 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

1923 to 2016
Yearly extremes at Bunker 4N: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.2 C (108.0 F)198036.7 C (98.1 F)52
Coldest night (TNn)-31.7 C (-25.1 F)1985-20.0 C (-4.0 F)52
Wettest day (Rx1day)298.2 mm (11.7 in)198374.0 mm (2.9 in)78
Wettest five days (Rx5day)312.2 mm (12.3 in)1983100.3 mm (3.9 in)78
Longest dry spell (CDD)58 days198923 days78

Hottest day (TXx)

Hottest day (TXx) at Bunker 4N by year The hottest day of the year at Bunker 4N, 1923 to 2016. The record is 42.2 C (108.0 F) in 1980, marked on the chart; the median year is 36.7 C (98.1 F). 3032.53537.54042.51940196019802000Record: 42.2 C (108.0 F) in 1980
The hottest day of the year at Bunker 4N, 1923 to 2016. The record is 42.2 C (108.0 F) in 1980, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Bunker 4N by year
YearHottest day (TXx)
1923n/a
1924n/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
1962n/a
196332.8 C (91.0 F)
196438.9 C (102.0 F)
196536.1 C (97.0 F)
196638.9 C (102.0 F)
196733.9 C (93.0 F)
196833.3 C (91.9 F)
196938.3 C (100.9 F)
197035.6 C (96.1 F)
197136.7 C (98.1 F)
197235.6 C (96.1 F)
197333.9 C (93.0 F)
197437.2 C (99.0 F)
197536.1 C (97.0 F)
197636.7 C (98.1 F)
197736.1 C (97.0 F)
197836.7 C (98.1 F)
197933.9 C (93.0 F)
198042.2 C (108.0 F)
198136.1 C (97.0 F)
198236.1 C (97.0 F)
198338.3 C (100.9 F)
198438.9 C (102.0 F)
198536.1 C (97.0 F)
198637.2 C (99.0 F)
198736.1 C (97.0 F)
198837.2 C (99.0 F)
198933.3 C (91.9 F)
199036.7 C (98.1 F)
199138.9 C (102.0 F)
199232.2 C (90.0 F)
199432.8 C (91.0 F)
199537.2 C (99.0 F)
199634.4 C (93.9 F)
199737.8 C (100.0 F)
199835.6 C (96.1 F)
199938.3 C (100.9 F)
200038.3 C (100.9 F)
200136.7 C (98.1 F)
200236.7 C (98.1 F)
200336.7 C (98.1 F)
200435.0 C (95.0 F)
200536.7 C (98.1 F)
200636.7 C (98.1 F)
200740.6 C (105.1 F)
200835.6 C (96.1 F)
200935.6 C (96.1 F)
201037.2 C (99.0 F)
201138.3 C (100.9 F)
201239.4 C (102.9 F)
201334.4 C (93.9 F)
201434.4 C (93.9 F)
201534.4 C (93.9 F)
2016n/a

Coldest night (TNn)

Coldest night (TNn) at Bunker 4N by year The coldest night of the year at Bunker 4N, 1923 to 2016. The record is -31.7 C (-25.1 F) in 1985, marked on the chart; the median year is -20.0 C (-4.0 F). -40-30-20-1001940196019802000Record: -31.7 C (-25.1 F) in 1985
The coldest night of the year at Bunker 4N, 1923 to 2016. The record is -31.7 C (-25.1 F) in 1985, marked on the chart; the median year is -20.0 C (-4.0 F).
Coldest night (TNn) at Bunker 4N by year
YearColdest night (TNn)
1923n/a
1924n/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
1962n/a
1963-18.3 C (-0.9 F)
1964-16.1 C (3.0 F)
1965-21.1 C (-6.0 F)
1966-22.2 C (-8.0 F)
1967-17.8 C (0.0 F)
1968-22.8 C (-9.0 F)
1969-17.8 C (0.0 F)
1970-22.2 C (-8.0 F)
1971-18.9 C (-2.0 F)
1972-21.7 C (-7.1 F)
1973-16.1 C (3.0 F)
1974-21.1 C (-6.0 F)
1975-16.1 C (3.0 F)
1976-20.0 C (-4.0 F)
1977-19.4 C (-2.9 F)
1978-20.6 C (-5.1 F)
1979-23.3 C (-9.9 F)
1980-20.0 C (-4.0 F)
1981-24.4 C (-11.9 F)
1982-25.6 C (-14.1 F)
1983-28.3 C (-18.9 F)
1984-23.9 C (-11.0 F)
1985-31.7 C (-25.1 F)
1986-20.6 C (-5.1 F)
1987-15.6 C (3.9 F)
1988-25.6 C (-14.1 F)
1989-30.0 C (-22.0 F)
1990-17.8 C (0.0 F)
1991-15.0 C (5.0 F)
1992-16.1 C (3.0 F)
1994-10.6 C (12.9 F)
1995-18.3 C (-0.9 F)
1996-23.3 C (-9.9 F)
1997-20.6 C (-5.1 F)
1998-16.7 C (1.9 F)
1999-8.9 C (16.0 F)
2000-12.8 C (9.0 F)
2001-16.1 C (3.0 F)
2002-26.1 C (-15.0 F)
2003-24.4 C (-11.9 F)
2004-18.9 C (-2.0 F)
2005-12.8 C (9.0 F)
2006-17.8 C (0.0 F)
2007-22.2 C (-8.0 F)
2008-18.9 C (-2.0 F)
2009-20.0 C (-4.0 F)
2010-16.1 C (3.0 F)
2011-26.7 C (-16.1 F)
2012-17.8 C (0.0 F)
2013-17.2 C (1.0 F)
2014-29.4 C (-20.9 F)
2015-27.8 C (-18.0 F)
2016n/a

Wettest day (Rx1day)

Wettest day (Rx1day) at Bunker 4N by year The wettest day of the year at Bunker 4N, 1923 to 2016. The record is 298.2 mm (11.7 in) in 1983, marked on the chart; the median year is 74.0 mm (2.9 in). 01002003001940196019802000Record: 298.2 mm (11.7 in) in 1983
The wettest day of the year at Bunker 4N, 1923 to 2016. The record is 298.2 mm (11.7 in) in 1983, marked on the chart; the median year is 74.0 mm (2.9 in).
Wettest day (Rx1day) at Bunker 4N by year
YearWettest day (Rx1day)
192357.7 mm (2.3 in)
192465.5 mm (2.6 in)
194053.6 mm (2.1 in)
1941119.4 mm (4.7 in)
194250.8 mm (2.0 in)
194350.8 mm (2.0 in)
194461.2 mm (2.4 in)
194591.9 mm (3.6 in)
194691.4 mm (3.6 in)
194750.8 mm (2.0 in)
194883.8 mm (3.3 in)
194961.0 mm (2.4 in)
1950108.0 mm (4.3 in)
1951114.3 mm (4.5 in)
195268.6 mm (2.7 in)
195335.1 mm (1.4 in)
195442.7 mm (1.7 in)
195554.1 mm (2.1 in)
195683.8 mm (3.3 in)
1957110.2 mm (4.3 in)
195885.3 mm (3.4 in)
195958.2 mm (2.3 in)
196041.7 mm (1.6 in)
196169.9 mm (2.8 in)
196282.6 mm (3.3 in)
196376.5 mm (3.0 in)
196473.4 mm (2.9 in)
1965121.2 mm (4.8 in)
1966111.0 mm (4.4 in)
196765.5 mm (2.6 in)
196873.7 mm (2.9 in)
196955.1 mm (2.2 in)
197074.9 mm (2.9 in)
1971103.4 mm (4.1 in)
197274.7 mm (2.9 in)
1973116.6 mm (4.6 in)
197487.1 mm (3.4 in)
197555.4 mm (2.2 in)
197679.8 mm (3.1 in)
197792.2 mm (3.6 in)
197841.9 mm (1.6 in)
1979101.6 mm (4.0 in)
198038.1 mm (1.5 in)
198154.1 mm (2.1 in)
198271.6 mm (2.8 in)
1983298.2 mm (11.7 in)
1984108.7 mm (4.3 in)
1985105.7 mm (4.2 in)
198675.4 mm (3.0 in)
198760.2 mm (2.4 in)
198877.5 mm (3.1 in)
198954.4 mm (2.1 in)
199045.7 mm (1.8 in)
199177.0 mm (3.0 in)
199242.4 mm (1.7 in)
199450.8 mm (2.0 in)
199550.8 mm (2.0 in)
199676.2 mm (3.0 in)
199763.5 mm (2.5 in)
199858.4 mm (2.3 in)
199958.4 mm (2.3 in)
200033.0 mm (1.3 in)
200182.6 mm (3.3 in)
2002102.1 mm (4.0 in)
200374.2 mm (2.9 in)
200451.3 mm (2.0 in)
200573.7 mm (2.9 in)
200666.3 mm (2.6 in)
200750.8 mm (2.0 in)
2008212.1 mm (8.4 in)
2009117.3 mm (4.6 in)
201058.4 mm (2.3 in)
2011152.4 mm (6.0 in)
2012101.6 mm (4.0 in)
2013117.3 mm (4.6 in)
201486.9 mm (3.4 in)
2015114.3 mm (4.5 in)
2016120.7 mm (4.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Bunker 4N by year The wettest five days of the year at Bunker 4N, 1923 to 2016. The record is 312.2 mm (12.3 in) in 1983, marked on the chart; the median year is 100.3 mm (3.9 in). 01002003004001940196019802000Record: 312.2 mm (12.3 in) in 1983
The wettest five days of the year at Bunker 4N, 1923 to 2016. The record is 312.2 mm (12.3 in) in 1983, marked on the chart; the median year is 100.3 mm (3.9 in).
Wettest five days (Rx5day) at Bunker 4N by year
YearWettest five days (Rx5day)
192386.1 mm (3.4 in)
192490.9 mm (3.6 in)
194094.8 mm (3.7 in)
1941119.4 mm (4.7 in)
194257.6 mm (2.3 in)
1943146.6 mm (5.8 in)
194470.6 mm (2.8 in)
1945222.0 mm (8.7 in)
1946173.2 mm (6.8 in)
194790.2 mm (3.6 in)
194883.8 mm (3.3 in)
194989.0 mm (3.5 in)
1950111.8 mm (4.4 in)
1951199.9 mm (7.9 in)
1952111.8 mm (4.4 in)
195359.5 mm (2.3 in)
195446.5 mm (1.8 in)
195575.3 mm (3.0 in)
1956100.3 mm (3.9 in)
1957129.8 mm (5.1 in)
1958154.9 mm (6.1 in)
195993.4 mm (3.7 in)
196064.5 mm (2.5 in)
1961172.3 mm (6.8 in)
1962125.5 mm (4.9 in)
1963116.4 mm (4.6 in)
1964110.0 mm (4.3 in)
1965145.6 mm (5.7 in)
1966126.5 mm (5.0 in)
196792.9 mm (3.7 in)
196895.7 mm (3.8 in)
196988.4 mm (3.5 in)
1970113.6 mm (4.5 in)
1971138.2 mm (5.4 in)
1972161.1 mm (6.3 in)
1973210.6 mm (8.3 in)
1974116.3 mm (4.6 in)
197569.8 mm (2.7 in)
197679.8 mm (3.1 in)
1977123.2 mm (4.9 in)
197876.7 mm (3.0 in)
1979137.6 mm (5.4 in)
198058.1 mm (2.3 in)
1981109.7 mm (4.3 in)
1982127.4 mm (5.0 in)
1983312.2 mm (12.3 in)
1984170.9 mm (6.7 in)
1985159.6 mm (6.3 in)
1986108.7 mm (4.3 in)
1987125.0 mm (4.9 in)
198882.1 mm (3.2 in)
198997.8 mm (3.9 in)
199080.7 mm (3.2 in)
199177.0 mm (3.0 in)
199242.4 mm (1.7 in)
1994122.4 mm (4.8 in)
1995100.3 mm (3.9 in)
1996121.9 mm (4.8 in)
199776.2 mm (3.0 in)
1998130.8 mm (5.1 in)
199983.8 mm (3.3 in)
200066.8 mm (2.6 in)
200182.6 mm (3.3 in)
2002151.4 mm (6.0 in)
200375.5 mm (3.0 in)
200457.2 mm (2.3 in)
200589.2 mm (3.5 in)
200667.9 mm (2.7 in)
200774.6 mm (2.9 in)
2008212.1 mm (8.4 in)
2009161.0 mm (6.3 in)
201080.5 mm (3.2 in)
201119.8 mm (0.8 in)
201260.2 mm (2.4 in)
2013195.6 mm (7.7 in)
201486.9 mm (3.4 in)
2015142.2 mm (5.6 in)
2016120.7 mm (4.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Bunker 4N by year The longest dry spell of the year at Bunker 4N, 1923 to 2016. The record is 58 days in 1989, marked on the chart; the median year is 23 days. 02040601940196019802000Record: 58 days in 1989
The longest dry spell of the year at Bunker 4N, 1923 to 2016. The record is 58 days in 1989, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Bunker 4N by year
YearLongest dry spell (CDD)
192327 days
192426 days
194015 days
194130 days
194225 days
194327 days
194429 days
194519 days
194618 days
194739 days
194821 days
194947 days
195026 days
195126 days
195240 days
195321 days
195413 days
195522 days
195618 days
195723 days
195832 days
195935 days
196018 days
196115 days
196224 days
196352 days
196430 days
196535 days
196648 days
196729 days
196836 days
196922 days
197038 days
197128 days
197228 days
197320 days
197455 days
197515 days
197631 days
197719 days
197817 days
197925 days
198029 days
198121 days
198216 days
198331 days
198421 days
198518 days
198622 days
198718 days
198836 days
198958 days
199027 days
199127 days
199222 days
199418 days
199523 days
199621 days
199719 days
199833 days
199921 days
200035 days
200121 days
200220 days
200314 days
200424 days
200517 days
200614 days
200717 days
200821 days
200929 days
201031 days
20114 days
201216 days
201315 days
201420 days
201519 days
201619 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

24 years with a frost

Across 24 years with a frost, the median last spring frost at Bunker 4N falls on 11 April and the median first autumn frost on 13 October, which leaves a median of 184 days between them.

Frost dates and growing season at Bunker 4N
MeasureMedian, all yearsEarliest periodRecent period (1964 to 1998)Recent against earliestFitted trend
Last spring frost11 Apriln/a11 Apriln/an/a
First autumn frost13 Octobern/a13 Octobern/an/a
Growing days184 daysn/a184 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

46 years, 1924 to 2014

A day with at least 73.5 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 211.8 mm (8.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Bunker 4N: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years73.5 mm (2.9 in)
5 years99.2 mm (3.9 in)
10 years120.1 mm (4.7 in)
25 years151.6 mm (6.0 in)
50 years179.6 mm (7.1 in)Longer than the 46 years of record
100 years211.8 mm (8.3 in)Longer than the 46 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, 46 years of values from 1924 to 2014.

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: 298.2 mm (11.7 in) in 1983; 121.2 mm (4.8 in) in 1965; 116.6 mm (4.6 in) in 1973.

Download the Data

  • Data for Bunker 4N standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Bunker 4N 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).