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Built 2026-10-17 (17 October 2026)

Union Weather Records (USC00229070)

Record envelope, standing records and threshold days for Union (USC00229070), Mississippi, United States, with 45 years of record.

Key Facts for Union

  • Union (USC00229070) is a weather station in Mississippi, United States at 32.58 latitude and -89.12 longitude, 143 m (470 ft) above sea level.
  • The station reports from 1940 to 1984, 45 years of record.
  • 0 records set at Union still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Union set a daily record precipitation of 53.3 mm (2.1 in) on 10 December 1983.

About the Station

  • Location: Mississippi, United States, 32.58 latitude, -89.12 longitude.
  • Elevation: 143 m (470 ft).
  • Period of record: 1940 to 1984, 45 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 Union, with 2026 drawn through them The band shows the record high and record low for each calendar day at Union. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Union. 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 Union, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Decn/an/an/an/a

Which Years Hold Standing Records

0 standing records
Standing records at Union by the year they were set 0 records at Union still stand. 00000000000
0 records at Union still stand.
Standing records at Union by the year they were set
Year setStanding records

Wettest Day of Each Month

Jan: 171.7 mm (6.8 in)
Record daily precipitation for each month at Union The wettest day on record for each calendar month at Union. The most was 171.7 mm (6.8 in) on 6 January 1950. 050100150200 Jan: 171.7 mm (6.8 in), 6 January 1950 Jan Feb: 157.0 mm (6.2 in), 14 February 1950 Feb Mar: 130.8 mm (5.1 in), 4 March 1979 Mar Apr: 140.5 mm (5.5 in), 13 April 1979 Apr May: 129.5 mm (5.1 in), 2 May 1970 May Jun: 105.2 mm (4.1 in), 17 June 1976 Jun Jul: 69.9 mm (2.8 in), 1 July 1972 Jul Aug: 80.5 mm (3.2 in), 20 August 1970 Aug Sep: 96.5 mm (3.8 in), 17 September 1971 Sep Oct: 97.8 mm (3.9 in), 17 October 1975 Oct Nov: 85.9 mm (3.4 in), 11 November 1946 Nov Dec: 125.7 mm (4.9 in), 24 December 1974 Dec
The wettest day on record for each calendar month at Union. The most was 171.7 mm (6.8 in) on 6 January 1950.
Record daily precipitation for each month at Union
MonthRecord daily precipitation (mm)Date
Jan171.7 mm (6.8 in)6 January 1950
Feb157.0 mm (6.2 in)14 February 1950
Mar130.8 mm (5.1 in)4 March 1979
Apr140.5 mm (5.5 in)13 April 1979
May129.5 mm (5.1 in)2 May 1970
Jun105.2 mm (4.1 in)17 June 1976
Jul69.9 mm (2.8 in)1 July 1972
Aug80.5 mm (3.2 in)20 August 1970
Sep96.5 mm (3.8 in)17 September 1971
Oct97.8 mm (3.9 in)17 October 1975
Nov85.9 mm (3.4 in)11 November 1946
Dec125.7 mm (4.9 in)24 December 1974

Latest Records

20
Latest records at Union
DateStationRecordValueBeat old record byOld record stoodSignificance
10 December 1983Union, USdaily rain53.3 mm (2.1 in)6.3 mm (0.25 in)21 years13 of 100 (Routine)
6 December 1983Union, USdaily rain74.2 mm (2.9 in)24.2 mm (1.0 in)12 years20 of 100 (Routine)
5 December 1983Union, USdaily rain74.2 mm (2.9 in)36.6 mm (1.4 in)30 years33 of 100 (Routine)
4 June 1983Union, USdaily rain27.4 mm (1.1 in)3.8 mm (0.15 in)1 year6 of 100 (Routine)
21 May 1983Union, USdaily rain25.4 mm (1.0 in)4.6 mm (0.18 in)24 years14 of 100 (Routine)
19 May 1983Union, USdaily rain101.6 mm (4.0 in)69.8 mm (2.7 in)1 year44 of 100 (Notable)
18 May 1983Union, USdaily rain69.9 mm (2.8 in)29.3 mm (1.2 in)36 years33 of 100 (Routine)
15 May 1983Union, USdaily rain82.8 mm (3.3 in)49.5 mm (1.9 in)40 years48 of 100 (Notable)
26 March 1983Union, USdaily rain53.3 mm (2.1 in)16.0 mm (0.6 in)37 years23 of 100 (Routine)
5 March 1983Union, USdaily rain114.8 mm (4.5 in)70.3 mm (2.8 in)1 year40 of 100 (Notable)
31 January 1983Union, USdaily rain42.7 mm (1.7 in)14.8 mm (0.6 in)33 years23 of 100 (Routine)
31 December 1982Union, USdaily rain107.2 mm (4.2 in)71.1 mm (2.8 in)9 years46 of 100 (Notable)
7 October 1982Union, USdaily rain35.6 mm (1.4 in)12.0 mm (0.5 in)21 years16 of 100 (Routine)
1 September 1982Union, USdaily rain35.8 mm (1.4 in)17.0 mm (0.7 in)11 years18 of 100 (Routine)
6 August 1982Union, USdaily rain45.7 mm (1.8 in)19.0 mm (0.7 in)7 years21 of 100 (Routine)
30 July 1982Union, USdaily rain56.4 mm (2.2 in)15.3 mm (0.6 in)36 years25 of 100 (Routine)
27 June 1982Union, USdaily rain58.4 mm (2.3 in)41.9 mm (1.6 in)40 years46 of 100 (Notable)
20 April 1982Union, USdaily rain43.7 mm (1.7 in)5.9 mm (0.23 in)12 years9 of 100 (Routine)
26 February 1982Union, USdaily rain38.1 mm (1.5 in)24.4 mm (1.0 in)24 years25 of 100 (Routine)
15 February 1982Union, USdaily rain50.5 mm (2.0 in)8.6 mm (0.34 in)28 years16 of 100 (Routine)

Extremes by Year

1940 to 1984
Yearly extremes at Union: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)171.7 mm (6.8 in)195080.0 mm (3.1 in)45
Wettest five days (Rx5day)254.3 mm (10.0 in)1983128.8 mm (5.1 in)45
Longest dry spell (CDD)51 days195221 days45

Wettest day (Rx1day)

Wettest day (Rx1day) at Union by year The wettest day of the year at Union, 1940 to 1984. The record is 171.7 mm (6.8 in) in 1950, marked on the chart; the median year is 80.0 mm (3.1 in). 05010015020019401950196019701980Record: 171.7 mm (6.8 in) in 1950
The wettest day of the year at Union, 1940 to 1984. The record is 171.7 mm (6.8 in) in 1950, marked on the chart; the median year is 80.0 mm (3.1 in).
Wettest day (Rx1day) at Union by year
YearWettest day (Rx1day)
194066.0 mm (2.6 in)
194162.7 mm (2.5 in)
194270.6 mm (2.8 in)
194365.5 mm (2.6 in)
194467.8 mm (2.7 in)
194566.5 mm (2.6 in)
194685.9 mm (3.4 in)
194765.3 mm (2.6 in)
194880.5 mm (3.2 in)
194983.8 mm (3.3 in)
1950171.7 mm (6.8 in)
195162.5 mm (2.5 in)
195260.5 mm (2.4 in)
195376.7 mm (3.0 in)
1954109.2 mm (4.3 in)
195581.3 mm (3.2 in)
1956127.8 mm (5.0 in)
195780.0 mm (3.1 in)
195851.6 mm (2.0 in)
195950.8 mm (2.0 in)
196051.3 mm (2.0 in)
196191.7 mm (3.6 in)
196272.6 mm (2.9 in)
196354.6 mm (2.1 in)
196493.7 mm (3.7 in)
196557.2 mm (2.3 in)
196672.1 mm (2.8 in)
196769.3 mm (2.7 in)
196869.3 mm (2.7 in)
196991.2 mm (3.6 in)
1970129.5 mm (5.1 in)
197196.5 mm (3.8 in)
197275.2 mm (3.0 in)
197389.4 mm (3.5 in)
1974134.6 mm (5.3 in)
197597.8 mm (3.9 in)
1976105.2 mm (4.1 in)
197781.3 mm (3.2 in)
1978104.1 mm (4.1 in)
1979140.5 mm (5.5 in)
198074.2 mm (2.9 in)
1981104.1 mm (4.1 in)
1982107.2 mm (4.2 in)
1983114.8 mm (4.5 in)
198444.5 mm (1.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Union by year The wettest five days of the year at Union, 1940 to 1984. The record is 254.3 mm (10.0 in) in 1983, marked on the chart; the median year is 128.8 mm (5.1 in). 010020030019401950196019701980Record: 254.3 mm (10.0 in) in 1983
The wettest five days of the year at Union, 1940 to 1984. The record is 254.3 mm (10.0 in) in 1983, marked on the chart; the median year is 128.8 mm (5.1 in).
Wettest five days (Rx5day) at Union by year
YearWettest five days (Rx5day)
1940131.1 mm (5.2 in)
1941124.4 mm (4.9 in)
194295.7 mm (3.8 in)
1943126.7 mm (5.0 in)
1944154.1 mm (6.1 in)
194587.4 mm (3.4 in)
1946149.1 mm (5.9 in)
1947178.4 mm (7.0 in)
1948139.2 mm (5.5 in)
194995.0 mm (3.7 in)
1950221.7 mm (8.7 in)
1951120.4 mm (4.7 in)
195261.0 mm (2.4 in)
1953105.7 mm (4.2 in)
1954119.9 mm (4.7 in)
1955128.8 mm (5.1 in)
1956164.1 mm (6.5 in)
1957117.1 mm (4.6 in)
1958125.3 mm (4.9 in)
195991.4 mm (3.6 in)
196091.2 mm (3.6 in)
1961254.0 mm (10.0 in)
1962102.9 mm (4.1 in)
1963101.1 mm (4.0 in)
1964142.0 mm (5.6 in)
196576.5 mm (3.0 in)
1966141.2 mm (5.6 in)
196777.0 mm (3.0 in)
1968148.3 mm (5.8 in)
1969137.9 mm (5.4 in)
1970140.9 mm (5.5 in)
1971186.6 mm (7.3 in)
197294.2 mm (3.7 in)
1973115.8 mm (4.6 in)
1974177.0 mm (7.0 in)
1975138.1 mm (5.4 in)
1976176.0 mm (6.9 in)
1977154.8 mm (6.1 in)
1978106.6 mm (4.2 in)
1979197.4 mm (7.8 in)
1980141.1 mm (5.6 in)
1981156.2 mm (6.1 in)
1982111.8 mm (4.4 in)
1983254.3 mm (10.0 in)
198444.5 mm (1.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Union by year The longest dry spell of the year at Union, 1940 to 1984. The record is 51 days in 1952, marked on the chart; the median year is 21 days. 020406019401950196019701980Record: 51 days in 1952
The longest dry spell of the year at Union, 1940 to 1984. The record is 51 days in 1952, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Union by year
YearLongest dry spell (CDD)
194024 days
194122 days
194227 days
194320 days
194426 days
194517 days
194621 days
194728 days
194811 days
194921 days
195011 days
195128 days
195251 days
195320 days
195421 days
195523 days
195625 days
195740 days
195827 days
195915 days
196021 days
196125 days
196229 days
196334 days
196417 days
196529 days
196615 days
196717 days
196816 days
196918 days
197025 days
197118 days
197222 days
197315 days
197417 days
197517 days
197620 days
197718 days
197823 days
197918 days
198024 days
198125 days
198235 days
198330 days
19849 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

42 years, 1940 to 1981

A day with at least 78.1 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 184.4 mm (7.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Union: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years78.1 mm (3.1 in)
5 years101.1 mm (4.0 in)
10 years118.3 mm (4.7 in)
25 years142.6 mm (5.6 in)
50 years162.6 mm (6.4 in)Longer than the 42 years of record
100 years184.4 mm (7.3 in)Longer than the 42 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, 42 years of values from 1940 to 1981.

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: 171.7 mm (6.8 in) in 1950; 140.5 mm (5.5 in) in 1979; 134.6 mm (5.3 in) in 1974.

Download the Data

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