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Collinsville Post Office Weather Records (ASN00033013)

Record envelope, standing records and threshold days for Collinsville Post Office (ASN00033013), Australia, with 88 years of record.

Key Facts for Collinsville Post Office

  • Collinsville Post Office (ASN00033013) is a weather station in Australia at -20.55 latitude and 147.85 longitude, 196 m (643 ft) above sea level.
  • The station reports from 1939 to 2026, 88 years of record.
  • 1,464 records set at Collinsville Post Office still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Collinsville Post Office set a daily record high maximum temperature of 34.3 C (93.7 F) on 16 September 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Australia, -20.55 latitude, 147.85 longitude.
  • Elevation: 196 m (643 ft).
  • Period of record: 1939 to 2026, 88 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

5 days at or beyond a record
Daily record high and record low at Collinsville Post Office, with 2026 drawn through them The band shows the record high and record low for each calendar day at Collinsville Post Office. The lines show the 2026 daily maximum and minimum. 5 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -1001020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Collinsville Post Office. The lines show the 2026 daily maximum and minimum. 5 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Collinsville Post Office, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan44.0 C (111.2 F)15.0 C (59.0 F)35.9 C (96.6 F)18.6 C (65.5 F)
Feb43.3 C (109.9 F)15.6 C (60.1 F)37.2 C (99.0 F)20.0 C (68.0 F)
Mar40.7 C (105.3 F)10.2 C (50.4 F)34.4 C (93.9 F)15.0 C (59.0 F)
Apr36.9 C (98.4 F)5.2 C (41.4 F)34.4 C (93.9 F)11.9 C (53.4 F)
May34.7 C (94.5 F)1.7 C (35.1 F)31.5 C (88.7 F)6.1 C (43.0 F)
Jun32.8 C (91.0 F)-1.1 C (30.0 F)31.2 C (88.2 F)4.0 C (39.2 F)
Jul33.0 C (91.4 F)-1.0 C (30.2 F)33.0 C (91.4 F)3.7 C (38.7 F)
Aug34.2 C (93.6 F)-1.1 C (30.0 F)32.5 C (90.5 F)6.2 C (43.2 F)
Sep36.6 C (97.9 F)0.0 C (32.0 F)34.6 C (94.3 F)8.9 C (48.0 F)
Oct39.9 C (103.8 F)7.3 C (45.1 F)28.6 C (83.5 F)11.9 C (53.4 F)
Nov41.9 C (107.4 F)12.2 C (54.0 F)n/an/a
Dec42.2 C (108.0 F)14.3 C (57.7 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Collinsville Post Office by the year they were set 1,464 records at Collinsville Post Office still stand. 2016 holds the most, with 62. 0204060801957: 381958: 331959: 231960: 381961: 381962: 201963: 301964: 281965: 241966: 101967: 101968: 211969: 141970: 61971: 71972: 181973: 121974: 171975: 121976: 221977: 141978: 101979: 81980: 81981: 211982: 51983: 341984: 91985: 211986: 271987: 181988: 131989: 251990: 361991: 121992: 211993: 171994: 291995: 361996: 211997: 61998: 311999: 152000: 322001: 272002: 322003: 142004: 102005: 232006: 142007: 272008: 142009: 202010: 242011: 122012: 182013: 202014: 142015: 252016: 622017: 262018: 372019: 162020: 192021: 252022: 272023: 192024: 142025: 302026: 51957196419711978198519921999200620132020
1,464 records at Collinsville Post Office still stand. 2016 holds the most, with 62.
Standing records at Collinsville Post Office by the year they were set
Year setStanding records
195738
195833
195923
196038
196138
196220
196330
196428
196524
196610
196710
196821
196914
19706
19717
197218
197312
197417
197512
197622
197714
197810
19798
19808
198121
19825
198334
19849
198521
198627
198718
198813
198925
199036
199112
199221
199317
199429
199536
199621
19976
199831
199915
200032
200127
200232
200314
200410
200523
200614
200727
200814
200920
201024
201112
201218
201320
201414
201525
201662
201726
201837
201916
202019
202125
202227
202319
202414
202530
20265

All-Time Record Progression

6 new records
When Collinsville Post Office set new all-time records 6 all-time records were set at Collinsville Post Office between 3 February 1991 and 14 February 2017. Each dot is a new record. Record daily precipitationRecord high maximum temperatureRecord low maximum temperatureRecord high minimum temperature3 February 1991: Record daily precipitation 266.2 mm (10.5 in)4 January 1994: Record high maximum temperature 43.5 C (110.3 F)5 January 1994: Record high maximum temperature 43.8 C (110.8 F)6 January 1994: Record high maximum temperature 44.0 C (111.2 F)21 June 2007: Record low maximum temperature 11.0 C (51.8 F)14 February 2017: Record high minimum temperature 29.9 C (85.8 F)19952000200520102015
6 all-time records were set at Collinsville Post Office between 3 February 1991 and 14 February 2017. Each dot is a new record.
When Collinsville Post Office set new all-time records
DateKindDetail
1991-02-03Record daily precipitationRecord daily precipitation 266.2 mm (10.5 in)
1994-01-04Record high maximum temperatureRecord high maximum temperature 43.5 C (110.3 F)
1994-01-05Record high maximum temperatureRecord high maximum temperature 43.8 C (110.8 F)
1994-01-06Record high maximum temperatureRecord high maximum temperature 44.0 C (111.2 F)
2007-06-21Record low maximum temperatureRecord low maximum temperature 11.0 C (51.8 F)
2017-02-14Record high minimum temperatureRecord high minimum temperature 29.9 C (85.8 F)

Wettest Day of Each Month

Feb: 266.2 mm (10.5 in)
Record daily precipitation for each month at Collinsville Post Office The wettest day on record for each calendar month at Collinsville Post Office. The most was 266.2 mm (10.5 in) on 3 February 1991. 0100200300 Jan: 146.2 mm (5.8 in), 4 January 1991 Jan Feb: 266.2 mm (10.5 in), 3 February 1991 Feb Mar: 235.7 mm (9.3 in), 4 March 1946 Mar Apr: 101.6 mm (4.0 in), 2 April 1958 Apr May: 120.4 mm (4.7 in), 19 May 2017 May Jun: 84.8 mm (3.3 in), 6 June 1990 Jun Jul: 92.2 mm (3.6 in), 9 July 1950 Jul Aug: 114.0 mm (4.5 in), 30 August 1998 Aug Sep: 44.0 mm (1.7 in), 21 September 1996 Sep Oct: 57.0 mm (2.2 in), 30 October 2000 Oct Nov: 143.0 mm (5.6 in), 25 November 1950 Nov Dec: 182.4 mm (7.2 in), 27 December 1990 Dec
The wettest day on record for each calendar month at Collinsville Post Office. The most was 266.2 mm (10.5 in) on 3 February 1991.
Record daily precipitation for each month at Collinsville Post Office
MonthRecord daily precipitation (mm)Date
Jan146.2 mm (5.8 in)4 January 1991
Feb266.2 mm (10.5 in)3 February 1991
Mar235.7 mm (9.3 in)4 March 1946
Apr101.6 mm (4.0 in)2 April 1958
May120.4 mm (4.7 in)19 May 2017
Jun84.8 mm (3.3 in)6 June 1990
Jul92.2 mm (3.6 in)9 July 1950
Aug114.0 mm (4.5 in)30 August 1998
Sep44.0 mm (1.7 in)21 September 1996
Oct57.0 mm (2.2 in)30 October 2000
Nov143.0 mm (5.6 in)25 November 1950
Dec182.4 mm (7.2 in)27 December 1990

Period of Record Coverage

1957 to 2026
Days with data per year at Collinsville Post Office 70 years of record at Collinsville Post Office, 1957 to 2026. 24 years have data for under 90 percent of days and are left out of rankings: 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973 and others. 1957: 363 of 365 days1958: 365 of 365 days1959: 362 of 365 days1960: 362 of 366 days1961: 365 of 365 days1962: 361 of 365 days1963: 364 of 365 days1964: 365 of 366 days1965: 363 of 365 days1966: 288 of 365 days1967: 208 of 365 days1968: 251 of 366 days1969: 189 of 365 days1970: 111 of 365 days1971: 234 of 365 days1972: 251 of 366 days1973: 247 of 365 days1974: 246 of 365 days1975: 254 of 365 days1976: 239 of 366 days1977: 248 of 365 days1978: 248 of 365 days1979: 230 of 365 days1980: 252 of 366 days1981: 252 of 365 days1982: 192 of 365 days1983: 251 of 365 days1984: 250 of 366 days1985: 253 of 365 days1986: 334 of 365 days1987: 359 of 365 days1988: 357 of 366 days1989: 365 of 365 days1990: 356 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 363 of 365 days1994: 365 of 365 days1995: 364 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 363 of 365 days2000: 363 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 364 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 361 of 365 days2008: 351 of 366 days2009: 359 of 365 days2010: 351 of 365 days2011: 309 of 365 days2012: 353 of 366 days2013: 340 of 365 days2014: 328 of 365 days2015: 223 of 365 days2016: 364 of 366 days2017: 358 of 365 days2018: 362 of 365 days2019: 361 of 365 days2020: 361 of 366 days2021: 342 of 365 days2022: 350 of 365 days2023: 359 of 365 days2024: 358 of 366 days2025: 361 of 365 days2026: 272 of 365 days1960197019801990200020102020
70 years of record at Collinsville Post Office, 1957 to 2026. 24 years have data for under 90 percent of days and are left out of rankings: 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973 and others.
Days with data per year at Collinsville Post Office
YearDays with dataShare of yearComplete
195736399%Yes
1958365100%Yes
195936299%Yes
196036299%Yes
1961365100%Yes
196236199%Yes
1963364100%Yes
1964365100%Yes
196536399%Yes
196628879%No
196720857%No
196825169%No
196918952%No
197011130%No
197123464%No
197225169%No
197324768%No
197424667%No
197525470%No
197623965%No
197724868%No
197824868%No
197923063%No
198025269%No
198125269%No
198219253%No
198325169%No
198425068%No
198525369%No
198633492%Yes
198735998%Yes
198835798%Yes
1989365100%Yes
199035698%Yes
1991365100%Yes
1992366100%Yes
199336399%Yes
1994365100%Yes
1995364100%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
199936399%Yes
200036399%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
200436499%Yes
2005365100%Yes
2006365100%Yes
200736199%Yes
200835196%Yes
200935998%Yes
201035196%Yes
201130985%No
201235396%Yes
201334093%Yes
201432890%No
201522361%No
201636499%Yes
201735898%Yes
201836299%Yes
201936199%Yes
202036199%Yes
202134294%Yes
202235096%Yes
202335998%Yes
202435898%Yes
202536199%Yes
202627275%No

Latest Records

20
Latest records at Collinsville Post Office
DateStationRecordValueBeat old record byOld record stoodSignificance
16 September 2026Collinsville Post Office, AUdaily high max (Provisional)34.3 C (93.7 F)0.4 C (0.7 F)65 years27 of 100 (Routine)
7 September 2026Collinsville Post Office, AUdaily high max (Provisional)34.6 C (94.3 F)0.6 C (1.1 F)20 years15 of 100 (Routine)
12 August 2026Collinsville Post Office, AUdaily high max32.5 C (90.5 F)1.6 C (2.9 F)16 years18 of 100 (Routine)
4 July 2026Collinsville Post Office, AUdaily high max29.4 C (84.9 F)1.0 C (1.8 F)40 years23 of 100 (Routine)
3 July 2026Collinsville Post Office, AUmonthly high max33.0 C (91.4 F)1.0 C (1.8 F)10 years24 of 100 (Routine)
10 June 2026Collinsville Post Office, AUdaily high min17.2 C (63.0 F)0.3 C (0.5 F)59 years24 of 100 (Routine)
15 April 2026Collinsville Post Office, AUdaily low max27.0 C (80.6 F)0.4 C (0.7 F)55 years24 of 100 (Routine)
7 March 2026Collinsville Post Office, AUdaily rain82.7 mm (3.3 in)35.7 mm (1.4 in)55 years43 of 100 (Notable)
17 January 2026Collinsville Post Office, AUdaily rain73.2 mm (2.9 in)22.8 mm (0.9 in)14 years25 of 100 (Routine)
12 January 2026Collinsville Post Office, AUdaily rain35.7 mm (1.4 in)13.1 mm (0.5 in)67 years35 of 100 (Notable)
28 December 2025Collinsville Post Office, AUdaily low max27.0 C (80.6 F)0.4 C (0.7 F)28 years15 of 100 (Routine)
24 December 2025Collinsville Post Office, AUdaily high min26.0 C (78.8 F)0.5 C (0.9 F)20 years14 of 100 (Routine)
23 December 2025Collinsville Post Office, AUdaily high max39.5 C (103.1 F)1.2 C (2.2 F)4 years11 of 100 (Routine)
30 November 2025Collinsville Post Office, AUdaily high min26.5 C (79.7 F)1.8 C (3.2 F)38 years24 of 100 (Routine)
29 November 2025Collinsville Post Office, AUdaily high min25.4 C (77.7 F)0.4 C (0.7 F)51 years22 of 100 (Routine)
24 November 2025Collinsville Post Office, AUdaily high max39.9 C (103.8 F)1.2 C (2.2 F)16 years15 of 100 (Routine)
10 November 2025Collinsville Post Office, AUdaily rain43.0 mm (1.7 in)29.0 mm (1.1 in)84 years52 of 100 (Notable)
3 November 2025Collinsville Post Office, AUdaily high max38.0 C (100.4 F)1.9 C (3.4 F)68 years33 of 100 (Routine)
31 October 2025Collinsville Post Office, AUdaily high min24.4 C (75.9 F)0.4 C (0.7 F)22 years13 of 100 (Routine)
30 October 2025Collinsville Post Office, AUdaily high max38.2 C (100.8 F)0.1 C (0.2 F)44 years19 of 100 (Routine)

Climate Trend

45 complete years, 1957 to 2025
Annual mean temperature at Collinsville Post Office as warming stripes, 1957 to 2025 One stripe for each of 45 complete years at Collinsville Post Office, 1957 to 2025. Blue stripes are years cooler than the station's own mean of 23.6 C (74.5 F); red stripes are warmer. The coolest year was 1960, at 22.2 C (71.9 F), and the warmest was 2016, at 25.0 C (77.0 F). The strongest colour marks a difference of 1.5 C (2.7 F). 1957: 23.0 C, -0.6 C from the station mean1958: 23.4 C, -0.2 C from the station mean1959: 22.4 C, -1.3 C from the station mean1960: 22.2 C, -1.4 C from the station mean1961: 22.8 C, -0.8 C from the station mean1962: 23.3 C, -0.3 C from the station mean1963: 22.4 C, -1.2 C from the station mean1964: 23.7 C, +0.1 C from the station mean1965: 22.7 C, -0.9 C from the station mean1981: 23.2 C, -0.5 C from the station mean1986: 23.9 C, +0.2 C from the station mean1987: 24.2 C, +0.5 C from the station mean1988: 23.6 C, -0.1 C from the station mean1989: 22.8 C, -0.9 C from the station mean1990: 23.0 C, -0.6 C from the station mean1991: 23.1 C, -0.6 C from the station mean1992: 24.1 C, +0.5 C from the station mean1993: 23.7 C, +0.1 C from the station mean1994: 23.4 C, -0.3 C from the station mean1995: 24.0 C, +0.4 C from the station mean1996: 24.1 C, +0.5 C from the station mean1997: 23.2 C, -0.4 C from the station mean1998: 24.4 C, +0.8 C from the station mean1999: 23.3 C, -0.3 C from the station mean2000: 22.6 C, -1.0 C from the station mean2001: 23.8 C, +0.2 C from the station mean2002: 24.1 C, +0.4 C from the station mean2003: 24.2 C, +0.6 C from the station mean2004: 24.2 C, +0.6 C from the station mean2005: 24.5 C, +0.9 C from the station mean2006: 23.6 C, 0.0 C from the station mean2007: 23.3 C, -0.3 C from the station mean2008: 23.1 C, -0.5 C from the station mean2009: 23.6 C, 0.0 C from the station mean2010: 23.7 C, +0.1 C from the station mean2013: 23.8 C, +0.2 C from the station mean2016: 25.0 C, +1.4 C from the station mean2017: 24.3 C, +0.6 C from the station mean2018: 24.1 C, +0.5 C from the station mean2019: 23.8 C, +0.2 C from the station mean2020: 24.3 C, +0.7 C from the station mean2022: 24.0 C, +0.4 C from the station mean2023: 24.2 C, +0.6 C from the station mean2024: 24.4 C, +0.8 C from the station mean2025: 24.4 C, +0.8 C from the station mean1957197019801990200020102020
One stripe for each of 45 complete years at Collinsville Post Office, 1957 to 2025. Blue stripes are years cooler than the station's own mean of 23.6 C (74.5 F); red stripes are warmer. The coolest year was 1960, at 22.2 C (71.9 F), and the warmest was 2016, at 25.0 C (77.0 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Collinsville Post Office as warming stripes, 1957 to 2025
YearAnnual mean temperatureDifference from the station mean
195723.0 C-0.60 C
195823.4 C-0.24 C
195922.4 C-1.27 C
196022.2 C-1.45 C
196122.8 C-0.83 C
196223.3 C-0.30 C
196322.4 C-1.19 C
196423.7 C+0.09 C
196522.7 C-0.91 C
198123.2 C-0.46 C
198623.9 C+0.24 C
198724.2 C+0.54 C
198823.6 C-0.07 C
198922.8 C-0.86 C
199023.0 C-0.60 C
199123.1 C-0.56 C
199224.1 C+0.47 C
199323.7 C+0.09 C
199423.4 C-0.26 C
199524.0 C+0.38 C
199624.1 C+0.48 C
199723.2 C-0.41 C
199824.4 C+0.75 C
199923.3 C-0.28 C
200022.6 C-0.98 C
200123.8 C+0.20 C
200224.1 C+0.44 C
200324.2 C+0.55 C
200424.2 C+0.57 C
200524.5 C+0.87 C
200623.6 C-0.05 C
200723.3 C-0.30 C
200823.1 C-0.48 C
200923.6 C-0.02 C
201023.7 C+0.09 C
201323.8 C+0.19 C
201625.0 C+1.40 C
201724.3 C+0.63 C
201824.1 C+0.50 C
201923.8 C+0.18 C
202024.3 C+0.65 C
202224.0 C+0.42 C
202324.2 C+0.61 C
202424.4 C+0.75 C
202524.4 C+0.81 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1957 to 2025. In Fahrenheit: 0.4 F (0.3 to 0.5) per decade. The slope is a straight line fitted to 45 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Collinsville Post Office
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (0.1 to 0.3) per decade0.4 F (0.3 to 0.5) per decade1957 to 202545Rise
Mean daily maximum0.2 C (0.1 to 0.3) per decade0.3 F (0.2 to 0.5) per decade1957 to 202545Rise
Mean daily minimum0.2 C (0.2 to 0.3) per decade0.4 F (0.3 to 0.6) per decade1957 to 202545Rise

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

1939 to 2026
Yearly extremes at Collinsville Post Office: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)44.0 C (111.2 F)199439.5 C (103.1 F)70
Coldest night (TNn)-1.1 C (30.0 F)19601.9 C (35.4 F)70
Wettest day (Rx1day)266.2 mm (10.5 in)199173.4 mm (2.9 in)88
Wettest five days (Rx5day)382.2 mm (15.0 in)1991131.4 mm (5.2 in)88
Longest dry spell (CDD)147 days201859 days88

Hottest day (TXx)

Hottest day (TXx) at Collinsville Post Office by year The hottest day of the year at Collinsville Post Office, 1939 to 2026. The record is 44.0 C (111.2 F) in 1994, marked on the chart; the median year is 39.5 C (103.1 F). 363840424419401960198020002020Record: 44.0 C (111.2 F) in 1994
The hottest day of the year at Collinsville Post Office, 1939 to 2026. The record is 44.0 C (111.2 F) in 1994, marked on the chart; the median year is 39.5 C (103.1 F).
Hottest day (TXx) at Collinsville Post Office by year
YearHottest day (TXx)
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
195738.4 C (101.1 F)
195840.6 C (105.1 F)
195938.9 C (102.0 F)
196039.4 C (102.9 F)
196138.9 C (102.0 F)
196239.5 C (103.1 F)
196338.6 C (101.5 F)
196439.7 C (103.5 F)
196540.1 C (104.2 F)
196637.2 C (99.0 F)
196738.9 C (102.0 F)
196840.0 C (104.0 F)
196943.3 C (109.9 F)
197037.8 C (100.0 F)
197140.6 C (105.1 F)
197239.5 C (103.1 F)
197339.2 C (102.6 F)
197438.0 C (100.4 F)
197536.3 C (97.3 F)
197636.5 C (97.7 F)
197739.5 C (103.1 F)
197838.3 C (100.9 F)
197939.3 C (102.7 F)
198038.8 C (101.8 F)
198138.7 C (101.7 F)
198239.1 C (102.4 F)
198341.7 C (107.1 F)
198438.4 C (101.1 F)
198540.8 C (105.4 F)
198639.0 C (102.2 F)
198739.6 C (103.3 F)
198839.0 C (102.2 F)
198939.1 C (102.4 F)
199041.3 C (106.3 F)
199140.0 C (104.0 F)
199241.6 C (106.9 F)
199338.5 C (101.3 F)
199444.0 C (111.2 F)
199542.2 C (108.0 F)
199640.0 C (104.0 F)
199738.7 C (101.7 F)
199837.7 C (99.9 F)
199938.9 C (102.0 F)
200040.2 C (104.4 F)
200141.2 C (106.2 F)
200239.9 C (103.8 F)
200339.8 C (103.6 F)
200441.5 C (106.7 F)
200540.9 C (105.6 F)
200641.4 C (106.5 F)
200738.5 C (101.3 F)
200839.4 C (102.9 F)
200938.3 C (100.9 F)
201040.8 C (105.4 F)
201139.2 C (102.6 F)
201240.6 C (105.1 F)
201340.0 C (104.0 F)
201441.3 C (106.3 F)
201538.4 C (101.1 F)
201640.6 C (105.1 F)
201741.0 C (105.8 F)
201841.9 C (107.4 F)
201941.0 C (105.8 F)
202039.6 C (103.3 F)
202138.6 C (101.5 F)
202240.3 C (104.5 F)
202339.9 C (103.8 F)
202438.5 C (101.3 F)
202539.9 C (103.8 F)
202637.2 C (99.0 F)

Coldest night (TNn)

Coldest night (TNn) at Collinsville Post Office by year The coldest night of the year at Collinsville Post Office, 1939 to 2026. The record is -1.1 C (30.0 F) in 1960, marked on the chart; the median year is 1.9 C (35.4 F). -2024619401960198020002020Record: -1.1 C (30.0 F) in 1960
The coldest night of the year at Collinsville Post Office, 1939 to 2026. The record is -1.1 C (30.0 F) in 1960, marked on the chart; the median year is 1.9 C (35.4 F).
Coldest night (TNn) at Collinsville Post Office by year
YearColdest night (TNn)
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
19571.7 C (35.1 F)
19582.1 C (35.8 F)
19590.0 C (32.0 F)
1960-1.1 C (30.0 F)
1961-1.1 C (30.0 F)
19620.6 C (33.1 F)
1963-0.6 C (30.9 F)
19642.1 C (35.8 F)
1965-0.8 C (30.6 F)
19660.4 C (32.7 F)
19671.9 C (35.4 F)
19680.6 C (33.1 F)
19692.2 C (36.0 F)
19703.3 C (37.9 F)
19712.2 C (36.0 F)
19720.8 C (33.4 F)
19734.0 C (39.2 F)
1974-1.0 C (30.2 F)
19755.4 C (41.7 F)
19760.4 C (32.7 F)
19770.5 C (32.9 F)
19782.0 C (35.6 F)
19792.8 C (37.0 F)
19803.2 C (37.8 F)
19813.0 C (37.4 F)
19820.0 C (32.0 F)
19830.0 C (32.0 F)
19840.8 C (33.4 F)
19851.4 C (34.5 F)
19862.0 C (35.6 F)
19872.0 C (35.6 F)
19882.0 C (35.6 F)
19891.6 C (34.9 F)
19901.8 C (35.2 F)
19912.0 C (35.6 F)
19922.0 C (35.6 F)
19930.1 C (32.2 F)
19941.9 C (35.4 F)
19952.5 C (36.5 F)
19962.5 C (36.5 F)
19971.7 C (35.1 F)
19982.5 C (36.5 F)
19992.4 C (36.3 F)
20000.2 C (32.4 F)
20011.9 C (35.4 F)
20021.0 C (33.8 F)
20031.0 C (33.8 F)
20040.7 C (33.3 F)
20053.7 C (38.7 F)
20063.1 C (37.6 F)
20070.6 C (33.1 F)
20081.8 C (35.2 F)
20091.6 C (34.9 F)
20103.2 C (37.8 F)
20112.5 C (36.5 F)
20120.2 C (32.4 F)
20134.4 C (39.9 F)
20140.5 C (32.9 F)
20152.1 C (35.8 F)
20164.1 C (39.4 F)
20174.2 C (39.6 F)
20180.9 C (33.6 F)
20192.2 C (36.0 F)
20200.0 C (32.0 F)
20213.5 C (38.3 F)
20221.5 C (34.7 F)
20233.8 C (38.8 F)
20242.1 C (35.8 F)
20252.1 C (35.8 F)
20263.7 C (38.7 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Collinsville Post Office by year The wettest day of the year at Collinsville Post Office, 1939 to 2026. The record is 266.2 mm (10.5 in) in 1991, marked on the chart; the median year is 73.4 mm (2.9 in). 010020030019401960198020002020Record: 266.2 mm (10.5 in) in 1991
The wettest day of the year at Collinsville Post Office, 1939 to 2026. The record is 266.2 mm (10.5 in) in 1991, marked on the chart; the median year is 73.4 mm (2.9 in).
Wettest day (Rx1day) at Collinsville Post Office by year
YearWettest day (Rx1day)
193955.6 mm (2.2 in)
194096.0 mm (3.8 in)
194156.4 mm (2.2 in)
194276.2 mm (3.0 in)
194374.7 mm (2.9 in)
194465.0 mm (2.6 in)
194574.9 mm (2.9 in)
1946235.7 mm (9.3 in)
1947141.5 mm (5.6 in)
194856.6 mm (2.2 in)
194951.3 mm (2.0 in)
1950143.0 mm (5.6 in)
195171.1 mm (2.8 in)
195251.8 mm (2.0 in)
195359.9 mm (2.4 in)
1954167.4 mm (6.6 in)
1955132.1 mm (5.2 in)
195683.6 mm (3.3 in)
195746.2 mm (1.8 in)
1958128.8 mm (5.1 in)
1959176.8 mm (7.0 in)
196084.6 mm (3.3 in)
196141.7 mm (1.6 in)
196274.2 mm (2.9 in)
196349.8 mm (2.0 in)
196445.2 mm (1.8 in)
196553.6 mm (2.1 in)
196651.8 mm (2.0 in)
196757.2 mm (2.3 in)
196883.6 mm (3.3 in)
196918.5 mm (0.7 in)
1970114.0 mm (4.5 in)
197172.9 mm (2.9 in)
197278.0 mm (3.1 in)
197373.9 mm (2.9 in)
197453.0 mm (2.1 in)
197540.3 mm (1.6 in)
1976154.3 mm (6.1 in)
197770.0 mm (2.8 in)
197885.0 mm (3.3 in)
197994.0 mm (3.7 in)
198055.0 mm (2.2 in)
198147.6 mm (1.9 in)
198243.4 mm (1.7 in)
198334.2 mm (1.3 in)
198443.0 mm (1.7 in)
198556.0 mm (2.2 in)
198634.8 mm (1.4 in)
198739.6 mm (1.6 in)
1988105.2 mm (4.1 in)
198975.0 mm (3.0 in)
1990182.4 mm (7.2 in)
1991266.2 mm (10.5 in)
199242.2 mm (1.7 in)
1993116.0 mm (4.6 in)
199461.0 mm (2.4 in)
199556.4 mm (2.2 in)
199661.0 mm (2.4 in)
1997116.0 mm (4.6 in)
1998114.0 mm (4.5 in)
199962.4 mm (2.5 in)
200073.8 mm (2.9 in)
200167.2 mm (2.6 in)
200237.4 mm (1.5 in)
200390.6 mm (3.6 in)
200456.8 mm (2.2 in)
200592.8 mm (3.7 in)
200656.4 mm (2.2 in)
2007145.2 mm (5.7 in)
2008158.8 mm (6.3 in)
200972.0 mm (2.8 in)
201089.4 mm (3.5 in)
201184.0 mm (3.3 in)
201265.6 mm (2.6 in)
2013122.2 mm (4.8 in)
201476.8 mm (3.0 in)
201584.4 mm (3.3 in)
201662.0 mm (2.4 in)
2017120.4 mm (4.7 in)
201865.2 mm (2.6 in)
2019102.2 mm (4.0 in)
2020126.1 mm (5.0 in)
202154.0 mm (2.1 in)
202299.8 mm (3.9 in)
202385.2 mm (3.4 in)
202473.0 mm (2.9 in)
202566.4 mm (2.6 in)
202682.7 mm (3.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Collinsville Post Office by year The wettest five days of the year at Collinsville Post Office, 1939 to 2026. The record is 382.2 mm (15.0 in) in 1991, marked on the chart; the median year is 131.4 mm (5.2 in). 010020030040019401960198020002020Record: 382.2 mm (15.0 in) in 1991
The wettest five days of the year at Collinsville Post Office, 1939 to 2026. The record is 382.2 mm (15.0 in) in 1991, marked on the chart; the median year is 131.4 mm (5.2 in).
Wettest five days (Rx5day) at Collinsville Post Office by year
YearWettest five days (Rx5day)
193976.7 mm (3.0 in)
1940210.0 mm (8.3 in)
194176.7 mm (3.0 in)
1942136.2 mm (5.4 in)
1943160.3 mm (6.3 in)
194477.7 mm (3.1 in)
1945141.7 mm (5.6 in)
1946332.7 mm (13.1 in)
1947257.6 mm (10.1 in)
194889.5 mm (3.5 in)
194996.8 mm (3.8 in)
1950176.1 mm (6.9 in)
1951226.2 mm (8.9 in)
1952104.2 mm (4.1 in)
1953124.4 mm (4.9 in)
1954198.6 mm (7.8 in)
1955215.4 mm (8.5 in)
1956223.9 mm (8.8 in)
195794.2 mm (3.7 in)
1958274.8 mm (10.8 in)
1959217.4 mm (8.6 in)
1960131.3 mm (5.2 in)
196177.3 mm (3.0 in)
1962121.0 mm (4.8 in)
1963156.6 mm (6.2 in)
1964108.1 mm (4.3 in)
196583.3 mm (3.3 in)
1966102.1 mm (4.0 in)
196790.7 mm (3.6 in)
1968198.7 mm (7.8 in)
196924.3 mm (1.0 in)
1970114.0 mm (4.5 in)
1971131.5 mm (5.2 in)
1972175.6 mm (6.9 in)
1973148.5 mm (5.8 in)
1974134.6 mm (5.3 in)
197571.5 mm (2.8 in)
1976218.5 mm (8.6 in)
1977151.0 mm (5.9 in)
197890.0 mm (3.5 in)
197949.6 mm (2.0 in)
198069.0 mm (2.7 in)
198155.6 mm (2.2 in)
1982104.2 mm (4.1 in)
198337.4 mm (1.5 in)
198461.4 mm (2.4 in)
1985140.6 mm (5.5 in)
198668.8 mm (2.7 in)
198774.0 mm (2.9 in)
1988247.6 mm (9.7 in)
1989169.9 mm (6.7 in)
1990314.4 mm (12.4 in)
1991382.2 mm (15.0 in)
199255.6 mm (2.2 in)
1993141.4 mm (5.6 in)
1994112.4 mm (4.4 in)
199596.8 mm (3.8 in)
1996118.4 mm (4.7 in)
1997170.6 mm (6.7 in)
1998199.6 mm (7.9 in)
199999.0 mm (3.9 in)
2000192.6 mm (7.6 in)
200197.4 mm (3.8 in)
200268.0 mm (2.7 in)
2003270.6 mm (10.7 in)
2004118.6 mm (4.7 in)
2005239.8 mm (9.4 in)
2006119.2 mm (4.7 in)
2007190.2 mm (7.5 in)
2008320.2 mm (12.6 in)
2009133.8 mm (5.3 in)
2010151.8 mm (6.0 in)
2011130.2 mm (5.1 in)
2012189.2 mm (7.4 in)
2013251.2 mm (9.9 in)
2014110.0 mm (4.3 in)
2015149.8 mm (5.9 in)
201697.4 mm (3.8 in)
2017178.6 mm (7.0 in)
2018115.6 mm (4.6 in)
2019175.6 mm (6.9 in)
2020131.7 mm (5.2 in)
202179.3 mm (3.1 in)
2022126.8 mm (5.0 in)
2023213.3 mm (8.4 in)
2024110.4 mm (4.3 in)
2025109.0 mm (4.3 in)
2026131.6 mm (5.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Collinsville Post Office by year The longest dry spell of the year at Collinsville Post Office, 1939 to 2026. The record is 147 days in 2018, marked on the chart; the median year is 59 days. 05010015019401960198020002020Record: 147 days in 2018
The longest dry spell of the year at Collinsville Post Office, 1939 to 2026. The record is 147 days in 2018, marked on the chart; the median year is 59 days.
Longest dry spell (CDD) at Collinsville Post Office by year
YearLongest dry spell (CDD)
193921 days
194079 days
194179 days
194244 days
194362 days
194471 days
194546 days
194682 days
194764 days
1948135 days
1949128 days
195035 days
195153 days
195245 days
195357 days
195449 days
195553 days
195621 days
195765 days
195856 days
1959104 days
196093 days
196166 days
196242 days
196384 days
196470 days
196563 days
196639 days
196759 days
196850 days
196946 days
197052 days
197152 days
197285 days
197339 days
197467 days
197538 days
197638 days
197764 days
197854 days
197937 days
198057 days
198140 days
198271 days
198350 days
198480 days
1985101 days
198635 days
198760 days
198849 days
198957 days
199084 days
199194 days
199269 days
199349 days
199455 days
199556 days
199639 days
199746 days
199846 days
199973 days
200071 days
200148 days
200286 days
200374 days
2004123 days
200568 days
200662 days
200753 days
200845 days
2009136 days
201025 days
201173 days
201249 days
201367 days
201496 days
201540 days
201627 days
201778 days
2018147 days
201962 days
202046 days
202161 days
202259 days
202376 days
202460 days
202557 days
2026127 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.

Rainfall Return Levels

85 years, 1940 to 2025

A day with at least 72.5 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 258.7 mm (10.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Collinsville Post Office: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years72.5 mm (2.9 in)
5 years108.1 mm (4.3 in)
10 years136.5 mm (5.4 in)
25 years179.0 mm (7.0 in)
50 years216.2 mm (8.5 in)
100 years258.7 mm (10.2 in)Longer than the 85 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, 85 years of values from 1940 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 266.2 mm (10.5 in) in 1991; 235.7 mm (9.3 in) in 1946; 182.4 mm (7.2 in) in 1990.

Station Changes

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

Download the Data

  • Data for Collinsville Post Office standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Collinsville Post Office 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-14).