Marrero 9 SSW Weather Records (USC00165926)

Record envelope, standing records and threshold days for Marrero 9 SSW (USC00165926), Louisiana, United States, with 30 years of record.

Key Facts for Marrero 9 SSW

Marrero 9 SSW (USC00165926) is a weather station in Louisiana, United States at 29.79 latitude and -90.12 longitude, 1 m (3 ft) above sea level.
The station reports from 1992 to 2021, 30 years of record.
1,464 records set at Marrero 9 SSW still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Louisiana, United States, 29.79 latitude, -90.12 longitude.
Elevation: 1 m (3 ft).
Period of record: 1992 to 2021, 30 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Marrero 9 SSW. 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 Marrero 9 SSW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	28.9 C (84.0 F)	-10.6 C (12.9 F)	n/a	n/a
Feb	30.0 C (86.0 F)	-4.4 C (24.1 F)	n/a	n/a
Mar	37.2 C (99.0 F)	-3.3 C (26.1 F)	n/a	n/a
Apr	32.2 C (90.0 F)	2.8 C (37.0 F)	n/a	n/a
May	35.0 C (95.0 F)	5.0 C (41.0 F)	n/a	n/a
Jun	37.8 C (100.0 F)	11.1 C (52.0 F)	n/a	n/a
Jul	38.9 C (102.0 F)	15.6 C (60.1 F)	n/a	n/a
Aug	37.8 C (100.0 F)	15.6 C (60.1 F)	n/a	n/a
Sep	36.7 C (98.1 F)	10.6 C (51.1 F)	n/a	n/a
Oct	34.4 C (93.9 F)	2.8 C (37.0 F)	n/a	n/a
Nov	30.6 C (87.1 F)	-2.2 C (28.0 F)	n/a	n/a
Dec	28.9 C (84.0 F)	-6.1 C (21.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Marrero 9 SSW still stand. 1992 holds the most, with 88.

Standing records at Marrero 9 SSW by the year they were set
Year set	Standing records
1992	88
1993	60
1994	69
1995	81
1996	71
1997	52
1998	43
1999	55
2000	78
2001	52
2002	50
2003	49
2004	40
2005	28
2006	41
2007	36
2008	34
2009	35
2010	57
2011	65
2012	36
2013	13
2014	43
2015	56
2016	28
2017	51
2018	81
2019	51
2020	11
2021	10

Wettest Day of Each Month

Sep: 349.3 mm (13.8 in)

The wettest day on record for each calendar month at Marrero 9 SSW. The most was 349.3 mm (13.8 in) on 11 September 1998.

Record daily precipitation for each month at Marrero 9 SSW
Month	Record daily precipitation (mm)	Date
Jan	179.1 mm (7.1 in)	11 January 1993
Feb	88.9 mm (3.5 in)	10 February 2005
Mar	100.3 mm (3.9 in)	8 March 1995
Apr	134.6 mm (5.3 in)	30 April 2006
May	133.4 mm (5.3 in)	4 May 2017
Jun	210.8 mm (8.3 in)	14 June 1999
Jul	139.7 mm (5.5 in)	23 July 2000
Aug	140.5 mm (5.5 in)	26 August 1992
Sep	349.3 mm (13.8 in)	11 September 1998
Oct	144.8 mm (5.7 in)	4 October 2002
Nov	71.1 mm (2.8 in)	4 November 1992
Dec	76.2 mm (3.0 in)	15 December 2009

Period of Record Coverage

1992 to 2021

30 years of record at Marrero 9 SSW, 1992 to 2021. 16 years have data for under 90 percent of days and are left out of rankings: 1995, 1996, 2003, 2004, 2005, 2006, 2007, 2009 and others.

Days with data per year at Marrero 9 SSW
Year	Days with data	Share of year	Complete
1992	364	99%	Yes
1993	362	99%	Yes
1994	362	99%	Yes
1995	319	87%	No
1996	322	88%	No
1997	354	97%	Yes
1998	350	96%	Yes
1999	346	95%	Yes
2000	349	95%	Yes
2001	346	95%	Yes
2002	344	94%	Yes
2003	328	90%	No
2004	320	87%	No
2005	275	75%	No
2006	308	84%	No
2007	268	73%	No
2008	343	94%	Yes
2009	247	68%	No
2010	267	73%	No
2011	238	65%	No
2012	182	50%	No
2013	211	58%	No
2014	226	62%	No
2015	321	88%	No
2016	344	94%	Yes
2017	361	99%	Yes
2018	360	99%	Yes
2019	365	100%	Yes
2020	73	20%	No
2021	127	35%	No

Latest Records

No records were set at this station in the latest data.

Climate Trend

13 complete years, 1992 to 2019

One stripe for each of 13 complete years at Marrero 9 SSW, 1992 to 2019. Blue stripes are years cooler than the station's own mean of 20.4 C (68.7 F); red stripes are warmer. The coolest year was 1997, at 19.8 C (67.7 F), and the warmest was 2017, at 21.2 C (70.2 F). The strongest colour marks a difference of 0.9 C (1.6 F).

Annual mean temperature at Marrero 9 SSW as warming stripes, 1992 to 2019
Year	Annual mean temperature	Difference from the station mean
1992	20.0 C	-0.36 C
1993	20.0 C	-0.39 C
1994	20.5 C	+0.11 C
1997	19.8 C	-0.59 C
1998	21.0 C	+0.59 C
1999	20.4 C	0.00 C
2000	20.4 C	0.00 C
2001	20.0 C	-0.37 C
2002	20.0 C	-0.42 C
2003	19.8 C	-0.56 C
2017	21.2 C	+0.82 C
2018	21.0 C	+0.63 C
2019	20.9 C	+0.54 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

1992 to 2021

Yearly extremes at Marrero 9 SSW: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.9 C (102.0 F)	1992	35.6 C (96.1 F)	30
Coldest night (TNn)	-10.6 C (12.9 F)	1996	-2.8 C (27.0 F)	30
Wettest day (Rx1day)	349.3 mm (13.8 in)	1998	88.9 mm (3.5 in)	30
Wettest five days (Rx5day)	420.4 mm (16.6 in)	1998	144.8 mm (5.7 in)	29
Longest dry spell (CDD)	41 days	2016	18 days	30

Hottest day (TXx)

The hottest day of the year at Marrero 9 SSW, 1992 to 2021. The record is 38.9 C (102.0 F) in 1992, marked on the chart; the median year is 35.6 C (96.1 F).

Hottest day (TXx) at Marrero 9 SSW by year
Year	Hottest day (TXx)
1992	38.9 C (102.0 F)
1993	36.7 C (98.1 F)
1994	35.6 C (96.1 F)
1995	37.2 C (99.0 F)
1996	35.6 C (96.1 F)
1997	36.1 C (97.0 F)
1998	35.6 C (96.1 F)
1999	36.7 C (98.1 F)
2000	37.2 C (99.0 F)
2001	34.4 C (93.9 F)
2002	35.6 C (96.1 F)
2003	33.3 C (91.9 F)
2004	34.4 C (93.9 F)
2005	35.6 C (96.1 F)
2006	36.7 C (98.1 F)
2007	37.8 C (100.0 F)
2008	35.6 C (96.1 F)
2009	37.8 C (100.0 F)
2010	37.2 C (99.0 F)
2011	37.2 C (99.0 F)
2012	37.2 C (99.0 F)
2013	35.6 C (96.1 F)
2014	34.4 C (93.9 F)
2015	36.1 C (97.0 F)
2016	35.6 C (96.1 F)
2017	35.6 C (96.1 F)
2018	35.0 C (95.0 F)
2019	36.1 C (97.0 F)
2020	26.7 C (80.1 F)
2021	35.6 C (96.1 F)

Coldest night (TNn)

The coldest night of the year at Marrero 9 SSW, 1992 to 2021. The record is -10.6 C (12.9 F) in 1996, marked on the chart; the median year is -2.8 C (27.0 F).

Coldest night (TNn) at Marrero 9 SSW by year
Year	Coldest night (TNn)
1992	-3.3 C (26.1 F)
1993	-2.8 C (27.0 F)
1994	-2.8 C (27.0 F)
1995	-2.2 C (28.0 F)
1996	-10.6 C (12.9 F)
1997	-3.9 C (25.0 F)
1998	0.0 C (32.0 F)
1999	-4.4 C (24.1 F)
2000	-6.1 C (21.0 F)
2001	-6.1 C (21.0 F)
2002	-5.0 C (23.0 F)
2003	-3.3 C (26.1 F)
2004	-2.8 C (27.0 F)
2005	-2.2 C (28.0 F)
2006	-2.8 C (27.0 F)
2007	-1.7 C (28.9 F)
2008	-3.3 C (26.1 F)
2009	-1.7 C (28.9 F)
2010	-6.1 C (21.0 F)
2011	-3.9 C (25.0 F)
2012	-2.2 C (28.0 F)
2013	-1.7 C (28.9 F)
2014	-5.6 C (21.9 F)
2015	-1.7 C (28.9 F)
2016	-1.7 C (28.9 F)
2017	-3.3 C (26.1 F)
2018	-7.8 C (18.0 F)
2019	-2.2 C (28.0 F)
2020	0.0 C (32.0 F)
2021	13.3 C (55.9 F)

Wettest day (Rx1day)

The wettest day of the year at Marrero 9 SSW, 1992 to 2021. The record is 349.3 mm (13.8 in) in 1998, marked on the chart; the median year is 88.9 mm (3.5 in).

Wettest day (Rx1day) at Marrero 9 SSW by year
Year	Wettest day (Rx1day)
1992	140.5 mm (5.5 in)
1993	179.1 mm (7.1 in)
1994	70.4 mm (2.8 in)
1995	100.3 mm (3.9 in)
1996	71.1 mm (2.8 in)
1997	68.3 mm (2.7 in)
1998	349.3 mm (13.8 in)
1999	210.8 mm (8.3 in)
2000	139.7 mm (5.5 in)
2001	116.8 mm (4.6 in)
2002	337.8 mm (13.3 in)
2003	100.1 mm (3.9 in)
2004	101.6 mm (4.0 in)
2005	88.9 mm (3.5 in)
2006	134.6 mm (5.3 in)
2007	71.1 mm (2.8 in)
2008	68.3 mm (2.7 in)
2009	76.2 mm (3.0 in)
2010	76.2 mm (3.0 in)
2011	63.5 mm (2.5 in)
2012	55.9 mm (2.2 in)
2013	51.3 mm (2.0 in)
2014	63.8 mm (2.5 in)
2015	88.9 mm (3.5 in)
2016	71.6 mm (2.8 in)
2017	133.4 mm (5.3 in)
2018	129.3 mm (5.1 in)
2019	100.1 mm (3.9 in)
2020	22.4 mm (0.9 in)
2021	41.4 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Marrero 9 SSW, 1992 to 2021. The record is 420.4 mm (16.6 in) in 1998, marked on the chart; the median year is 144.8 mm (5.7 in).

Wettest five days (Rx5day) at Marrero 9 SSW by year
Year	Wettest five days (Rx5day)
1992	178.3 mm (7.0 in)
1993	198.4 mm (7.8 in)
1994	122.8 mm (4.8 in)
1995	155.4 mm (6.1 in)
1996	78.7 mm (3.1 in)
1997	166.4 mm (6.6 in)
1998	420.4 mm (16.6 in)
1999	254.5 mm (10.0 in)
2000	139.7 mm (5.5 in)
2001	226.0 mm (8.9 in)
2002	337.8 mm (13.3 in)
2003	132.7 mm (5.2 in)
2004	215.9 mm (8.5 in)
2005	148.6 mm (5.9 in)
2006	182.1 mm (7.2 in)
2007	122.2 mm (4.8 in)
2008	103.2 mm (4.1 in)
2009	154.0 mm (6.1 in)
2010	156.2 mm (6.1 in)
2011	107.2 mm (4.2 in)
2012	83.9 mm (3.3 in)
2013	100.6 mm (4.0 in)
2014	100.8 mm (4.0 in)
2015	101.9 mm (4.0 in)
2016	67.3 mm (2.6 in)
2017	192.6 mm (7.6 in)
2018	129.3 mm (5.1 in)
2019	144.8 mm (5.7 in)
2020	7.4 mm (0.29 in)
2021	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Marrero 9 SSW, 1992 to 2021. The record is 41 days in 2016, marked on the chart; the median year is 18 days.

Longest dry spell (CDD) at Marrero 9 SSW by year
Year	Longest dry spell (CDD)
1992	23 days
1993	17 days
1994	17 days
1995	13 days
1996	17 days
1997	18 days
1998	28 days
1999	33 days
2000	27 days
2001	39 days
2002	20 days
2003	30 days
2004	17 days
2005	18 days
2006	29 days
2007	26 days
2008	20 days
2009	19 days
2010	14 days
2011	8 days
2012	8 days
2013	5 days
2014	9 days
2015	20 days
2016	41 days
2017	20 days
2018	18 days
2019	17 days
2020	7 days
2021	3 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.

Download the Data

Data for Marrero 9 SSW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Marrero 9 SSW 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).