Richardson Weather Records (USC00417588)

Record envelope, standing records and threshold days for Richardson (USC00417588), Texas, United States, with 81 years of record.

Key Facts for Richardson

Richardson (USC00417588) is a weather station in Texas, United States at 33.00 latitude and -96.74 longitude, 207 m (678 ft) above sea level.
The station reports from 1946 to 2026, 81 years of record.
1,464 records set at Richardson still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Richardson set a daily record precipitation of 71.1 mm (2.8 in) on 14 February 2026.

About the Station

Location: Texas, United States, 33.00 latitude, -96.74 longitude.
Elevation: 207 m (678 ft).
Period of record: 1946 to 2026, 81 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

32 days at or beyond a record

The band shows the record high and record low for each calendar day at Richardson. The lines show the 2026 daily maximum and minimum. 32 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Richardson, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	27.8 C (82.0 F)	-14.4 C (6.1 F)	26.1 C (79.0 F)	-11.1 C (12.0 F)
Feb	32.8 C (91.0 F)	-17.8 C (0.0 F)	28.3 C (82.9 F)	-5.6 C (21.9 F)
Mar	33.3 C (91.9 F)	-10.6 C (12.9 F)	33.3 C (91.9 F)	1.1 C (34.0 F)
Apr	37.2 C (99.0 F)	0.0 C (32.0 F)	33.9 C (93.0 F)	8.9 C (48.0 F)
May	36.7 C (98.1 F)	3.3 C (37.9 F)	34.4 C (93.9 F)	11.7 C (53.1 F)
Jun	44.4 C (111.9 F)	14.4 C (57.9 F)	n/a	n/a
Jul	41.7 C (107.1 F)	15.0 C (59.0 F)	n/a	n/a
Aug	42.8 C (109.0 F)	15.0 C (59.0 F)	37.8 C (100.0 F)	26.7 C (80.1 F)
Sep	41.7 C (107.1 F)	11.1 C (52.0 F)	n/a	n/a
Oct	37.8 C (100.0 F)	-1.7 C (28.9 F)	n/a	n/a
Nov	32.2 C (90.0 F)	-6.1 C (21.0 F)	n/a	n/a
Dec	28.9 C (84.0 F)	-12.8 C (9.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Richardson still stand. 2011 holds the most, with 132.

Standing records at Richardson by the year they were set
Year set	Standing records
1965	9
1970	3
1977	1
1979	33
1980	57
2006	67
2007	54
2008	46
2009	72
2010	68
2011	132
2012	59
2013	79
2014	68
2015	45
2016	42
2017	63
2018	62
2019	57
2020	44
2021	67
2022	82
2023	79
2024	62
2025	66
2026	47

All-Time Record Progression

1 new records

1 all-time records were set at Richardson between 6 February 2002 and 6 February 2002. Each dot is a new record.

Wettest Day of Each Month

Sep: 197.9 mm (7.8 in)

The wettest day on record for each calendar month at Richardson. The most was 197.9 mm (7.8 in) on 21 September 1964.

Record daily precipitation for each month at Richardson
Month	Record daily precipitation (mm)	Date
Jan	105.7 mm (4.2 in)	31 January 1990
Feb	92.7 mm (3.6 in)	20 February 2018
Mar	106.2 mm (4.2 in)	19 March 2006
Apr	121.4 mm (4.8 in)	28 April 1966
May	137.7 mm (5.4 in)	16 May 1989
Jun	104.1 mm (4.1 in)	5 June 2021
Jul	138.7 mm (5.5 in)	27 July 1962
Aug	102.9 mm (4.1 in)	14 August 1968
Sep	197.9 mm (7.8 in)	21 September 1964
Oct	146.1 mm (5.8 in)	8 October 1962
Nov	126.2 mm (5.0 in)	3 November 1946
Dec	88.9 mm (3.5 in)	13 December 1992

Period of Record Coverage

1965 to 2026

26 years of record at Richardson, 1965 to 2026. 7 years have data for under 90 percent of days and are left out of rankings: 1965, 1970, 1977, 1979, 1980, 2006, 2026.

Days with data per year at Richardson
Year	Days with data	Share of year	Complete
1965	30	8%	No
1970	31	8%	No
1977	28	8%	No
1979	183	50%	No
1980	153	42%	No
2006	273	75%	No
2007	364	100%	Yes
2008	362	99%	Yes
2009	334	92%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	365	100%	Yes
2013	362	99%	Yes
2014	348	95%	Yes
2015	363	99%	Yes
2016	366	100%	Yes
2017	362	99%	Yes
2018	363	99%	Yes
2019	365	100%	Yes
2020	364	99%	Yes
2021	365	100%	Yes
2022	365	100%	Yes
2023	363	99%	Yes
2024	366	100%	Yes
2025	365	100%	Yes
2026	153	42%	No

Latest Records

Latest records at Richardson
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
14 February 2026	Richardson, US	daily rain	71.1 mm (2.8 in)	36.8 mm (1.4 in)	8 years	37 of 100 (Notable)
4 June 2025	Richardson, US	daily rain	86.4 mm (3.4 in)	12.7 mm (0.5 in)	52 years	30 of 100 (Routine)
26 May 2025	Richardson, US	daily rain	53.3 mm (2.1 in)	10.1 mm (0.4 in)	27 years	20 of 100 (Routine)
5 April 2025	Richardson, US	daily rain	42.2 mm (1.7 in)	14.3 mm (0.6 in)	30 years	25 of 100 (Routine)
29 January 2025	Richardson, US	daily rain	68.6 mm (2.7 in)	39.4 mm (1.6 in)	26 years	47 of 100 (Notable)
9 January 2025	Richardson, US	daily rain	43.2 mm (1.7 in)	2.8 mm (0.11 in)	12 years	13 of 100 (Routine)
24 December 2024	Richardson, US	daily rain	38.4 mm (1.5 in)	17.1 mm (0.7 in)	45 years	32 of 100 (Routine)
22 July 2024	Richardson, US	daily rain	22.1 mm (0.9 in)	0.5 mm (0.02 in)	17 years	12 of 100 (Routine)
21 July 2024	Richardson, US	daily rain	7.6 mm (0.30 in)	1.0 mm (0.04 in)	39 years	18 of 100 (Routine)
30 May 2024	Richardson, US	daily rain	71.1 mm (2.8 in)	7.6 mm (0.30 in)	9 years	12 of 100 (Routine)
5 May 2024	Richardson, US	daily rain	67.8 mm (2.7 in)	11.9 mm (0.5 in)	55 years	28 of 100 (Routine)
20 April 2024	Richardson, US	daily rain	57.2 mm (2.3 in)	12.5 mm (0.5 in)	8 years	16 of 100 (Routine)
9 April 2024	Richardson, US	daily rain	33.5 mm (1.3 in)	7.1 mm (0.28 in)	16 years	15 of 100 (Routine)
7 March 2024	Richardson, US	daily rain	38.1 mm (1.5 in)	10.2 mm (0.4 in)	46 years	26 of 100 (Routine)
23 January 2024	Richardson, US	daily rain	25.4 mm (1.0 in)	5.3 mm (0.21 in)	70 years	32 of 100 (Routine)
26 October 2023	Richardson, US	daily rain (Tie)	50.8 mm (2.0 in)	tie	32 years	4 of 100 (Routine)
2 March 2023	Richardson, US	daily rain	25.4 mm (1.0 in)	3.3 mm (0.13 in)	34 years	19 of 100 (Routine)
7 February 2023	Richardson, US	daily rain	53.3 mm (2.1 in)	35.5 mm (1.4 in)	44 years	46 of 100 (Notable)
24 January 2023	Richardson, US	daily rain	30.7 mm (1.2 in)	1.2 mm (0.05 in)	11 years	10 of 100 (Routine)
24 October 2022	Richardson, US	daily rain	78.7 mm (3.1 in)	26.9 mm (1.1 in)	37 years	30 of 100 (Routine)

Climate Trend

17 complete years, 2007 to 2025

One stripe for each of 17 complete years at Richardson, 2007 to 2025. Blue stripes are years cooler than the station's own mean of 19.2 C (66.6 F); red stripes are warmer. The coolest year was 2019, at 18.4 C (65.1 F), and the warmest was 2024, at 20.6 C (69.2 F). The strongest colour marks a difference of 1.5 C (2.7 F).

Annual mean temperature at Richardson as warming stripes, 2007 to 2025
Year	Annual mean temperature	Difference from the station mean
2007	18.4 C	-0.77 C
2008	18.5 C	-0.69 C
2010	18.8 C	-0.42 C
2011	19.8 C	+0.55 C
2012	20.0 C	+0.76 C
2013	18.4 C	-0.83 C
2015	18.9 C	-0.29 C
2016	19.6 C	+0.34 C
2017	19.7 C	+0.45 C
2018	18.5 C	-0.76 C
2019	18.4 C	-0.84 C
2020	19.0 C	-0.21 C
2021	18.6 C	-0.58 C
2022	19.1 C	-0.13 C
2023	20.3 C	+1.07 C
2024	20.6 C	+1.43 C
2025	20.1 C	+0.93 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

1946 to 2026

Yearly extremes at Richardson: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	44.4 C (111.9 F)	1980	39.4 C (102.9 F)	26
Coldest night (TNn)	-17.8 C (0.0 F)	2021	-9.7 C (14.5 F)	26
Wettest day (Rx1day)	197.9 mm (7.8 in)	1964	81.3 mm (3.2 in)	80
Wettest five days (Rx5day)	329.9 mm (13.0 in)	1946	123.8 mm (4.9 in)	80
Longest dry spell (CDD)	94 days	2000	32 days	80

Hottest day (TXx)

The hottest day of the year at Richardson, 1946 to 2026. The record is 44.4 C (111.9 F) in 1980, marked on the chart; the median year is 39.4 C (102.9 F).

Hottest day (TXx) at Richardson by year
Year	Hottest day (TXx)
1946	n/a
1947	n/a
1948	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	35.0 C (95.0 F)
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	39.4 C (102.9 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	28.3 C (82.9 F)
1978	n/a
1979	37.8 C (100.0 F)
1980	44.4 C (111.9 F)
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	40.6 C (105.1 F)
2007	37.8 C (100.0 F)
2008	38.3 C (100.9 F)
2009	38.9 C (102.0 F)
2010	41.1 C (106.0 F)
2011	42.2 C (108.0 F)
2012	41.1 C (106.0 F)
2013	39.4 C (102.9 F)
2014	38.3 C (100.9 F)
2015	40.0 C (104.0 F)
2016	39.4 C (102.9 F)
2017	38.3 C (100.9 F)
2018	41.7 C (107.1 F)
2019	37.8 C (100.0 F)
2020	40.0 C (104.0 F)
2021	38.3 C (100.9 F)
2022	41.7 C (107.1 F)
2023	42.2 C (108.0 F)
2024	42.8 C (109.0 F)
2025	40.6 C (105.1 F)
2026	37.8 C (100.0 F)

Coldest night (TNn)

The coldest night of the year at Richardson, 1946 to 2026. The record is -17.8 C (0.0 F) in 2021, marked on the chart; the median year is -9.7 C (14.5 F).

Coldest night (TNn) at Richardson by year
Year	Coldest night (TNn)
1946	n/a
1947	n/a
1948	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	15.6 C (60.1 F)
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	21.1 C (70.0 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	0.0 C (32.0 F)
1978	n/a
1979	-8.9 C (16.0 F)
1980	-10.6 C (12.9 F)
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	-6.1 C (21.0 F)
2007	-10.6 C (12.9 F)
2008	-6.7 C (19.9 F)
2009	-6.1 C (21.0 F)
2010	-11.7 C (10.9 F)
2011	-12.8 C (9.0 F)
2012	-6.7 C (19.9 F)
2013	-7.8 C (18.0 F)
2014	-11.1 C (12.0 F)
2015	-9.4 C (15.1 F)
2016	-10.0 C (14.0 F)
2017	-11.1 C (12.0 F)
2018	-11.7 C (10.9 F)
2019	-6.7 C (19.9 F)
2020	-3.3 C (26.1 F)
2021	-17.8 C (0.0 F)
2022	-12.8 C (9.0 F)
2023	-4.4 C (24.1 F)
2024	-14.4 C (6.1 F)
2025	-11.7 C (10.9 F)
2026	-11.1 C (12.0 F)

Wettest day (Rx1day)

The wettest day of the year at Richardson, 1946 to 2026. The record is 197.9 mm (7.8 in) in 1964, marked on the chart; the median year is 81.3 mm (3.2 in).

Wettest day (Rx1day) at Richardson by year
Year	Wettest day (Rx1day)
1946	126.2 mm (5.0 in)
1947	27.4 mm (1.1 in)
1948	58.4 mm (2.3 in)
1950	44.5 mm (1.8 in)
1951	87.1 mm (3.4 in)
1952	76.7 mm (3.0 in)
1953	53.8 mm (2.1 in)
1954	48.3 mm (1.9 in)
1955	47.0 mm (1.9 in)
1956	72.6 mm (2.9 in)
1957	104.1 mm (4.1 in)
1958	87.6 mm (3.4 in)
1959	95.3 mm (3.8 in)
1960	63.5 mm (2.5 in)
1961	114.3 mm (4.5 in)
1962	146.1 mm (5.8 in)
1963	69.9 mm (2.8 in)
1964	197.9 mm (7.8 in)
1965	129.3 mm (5.1 in)
1966	121.4 mm (4.8 in)
1967	53.3 mm (2.1 in)
1968	102.9 mm (4.1 in)
1969	132.8 mm (5.2 in)
1970	64.3 mm (2.5 in)
1971	96.5 mm (3.8 in)
1972	54.1 mm (2.1 in)
1973	73.7 mm (2.9 in)
1974	76.2 mm (3.0 in)
1975	57.7 mm (2.3 in)
1976	51.3 mm (2.0 in)
1977	70.6 mm (2.8 in)
1978	53.3 mm (2.1 in)
1979	90.9 mm (3.6 in)
1980	68.8 mm (2.7 in)
1981	81.3 mm (3.2 in)
1982	101.3 mm (4.0 in)
1983	56.9 mm (2.2 in)
1984	66.0 mm (2.6 in)
1985	108.0 mm (4.3 in)
1986	71.1 mm (2.8 in)
1987	108.0 mm (4.3 in)
1988	101.6 mm (4.0 in)
1989	137.7 mm (5.4 in)
1990	105.7 mm (4.2 in)
1991	88.9 mm (3.5 in)
1992	88.9 mm (3.5 in)
1993	63.5 mm (2.5 in)
1994	114.3 mm (4.5 in)
1995	90.2 mm (3.6 in)
1996	127.0 mm (5.0 in)
1997	111.8 mm (4.4 in)
1998	86.4 mm (3.4 in)
1999	53.3 mm (2.1 in)
2000	88.9 mm (3.5 in)
2001	52.1 mm (2.1 in)
2002	98.3 mm (3.9 in)
2003	70.6 mm (2.8 in)
2004	80.8 mm (3.2 in)
2005	64.8 mm (2.6 in)
2006	106.2 mm (4.2 in)
2007	71.1 mm (2.8 in)
2008	100.6 mm (4.0 in)
2009	88.9 mm (3.5 in)
2010	136.9 mm (5.4 in)
2011	54.9 mm (2.2 in)
2012	65.8 mm (2.6 in)
2013	44.5 mm (1.8 in)
2014	44.5 mm (1.8 in)
2015	120.7 mm (4.8 in)
2016	57.4 mm (2.3 in)
2017	63.8 mm (2.5 in)
2018	108.2 mm (4.3 in)
2019	94.0 mm (3.7 in)
2020	89.7 mm (3.5 in)
2021	104.1 mm (4.1 in)
2022	81.3 mm (3.2 in)
2023	58.4 mm (2.3 in)
2024	71.1 mm (2.8 in)
2025	86.4 mm (3.4 in)
2026	71.1 mm (2.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Richardson, 1946 to 2026. The record is 329.9 mm (13.0 in) in 1946, marked on the chart; the median year is 123.8 mm (4.9 in).

Wettest five days (Rx5day) at Richardson by year
Year	Wettest five days (Rx5day)
1946	329.9 mm (13.0 in)
1947	62.7 mm (2.5 in)
1948	88.9 mm (3.5 in)
1950	67.3 mm (2.6 in)
1951	89.4 mm (3.5 in)
1952	119.2 mm (4.7 in)
1953	95.5 mm (3.8 in)
1954	92.0 mm (3.6 in)
1955	68.3 mm (2.7 in)
1956	83.9 mm (3.3 in)
1957	230.7 mm (9.1 in)
1958	142.3 mm (5.6 in)
1959	144.6 mm (5.7 in)
1960	144.4 mm (5.7 in)
1961	129.5 mm (5.1 in)
1962	203.2 mm (8.0 in)
1963	101.6 mm (4.0 in)
1964	264.4 mm (10.4 in)
1965	146.1 mm (5.8 in)
1966	280.5 mm (11.0 in)
1967	90.2 mm (3.6 in)
1968	106.7 mm (4.2 in)
1969	196.3 mm (7.7 in)
1970	107.5 mm (4.2 in)
1971	132.1 mm (5.2 in)
1972	121.4 mm (4.8 in)
1973	155.2 mm (6.1 in)
1974	156.2 mm (6.1 in)
1975	74.8 mm (2.9 in)
1976	80.8 mm (3.2 in)
1977	84.0 mm (3.3 in)
1978	76.2 mm (3.0 in)
1979	122.1 mm (4.8 in)
1980	214.0 mm (8.4 in)
1981	134.8 mm (5.3 in)
1982	132.5 mm (5.2 in)
1983	89.1 mm (3.5 in)
1984	133.8 mm (5.3 in)
1985	111.1 mm (4.4 in)
1986	104.6 mm (4.1 in)
1987	143.3 mm (5.6 in)
1988	117.3 mm (4.6 in)
1989	175.8 mm (6.9 in)
1990	119.7 mm (4.7 in)
1991	223.6 mm (8.8 in)
1992	146.1 mm (5.8 in)
1993	100.9 mm (4.0 in)
1994	152.6 mm (6.0 in)
1995	123.2 mm (4.9 in)
1996	160.1 mm (6.3 in)
1997	123.8 mm (4.9 in)
1998	115.6 mm (4.6 in)
1999	82.3 mm (3.2 in)
2000	137.2 mm (5.4 in)
2001	114.1 mm (4.5 in)
2002	177.1 mm (7.0 in)
2003	80.5 mm (3.2 in)
2004	100.9 mm (4.0 in)
2005	108.5 mm (4.3 in)
2006	130.4 mm (5.1 in)
2007	176.1 mm (6.9 in)
2008	114.8 mm (4.5 in)
2009	146.9 mm (5.8 in)
2010	148.4 mm (5.8 in)
2011	91.2 mm (3.6 in)
2012	131.3 mm (5.2 in)
2013	91.0 mm (3.6 in)
2014	80.8 mm (3.2 in)
2015	244.1 mm (9.6 in)
2016	146.6 mm (5.8 in)
2017	125.7 mm (4.9 in)
2018	248.4 mm (9.8 in)
2019	101.6 mm (4.0 in)
2020	117.1 mm (4.6 in)
2021	150.1 mm (5.9 in)
2022	158.4 mm (6.2 in)
2023	138.2 mm (5.4 in)
2024	164.3 mm (6.5 in)
2025	123.7 mm (4.9 in)
2026	79.0 mm (3.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Richardson, 1946 to 2026. The record is 94 days in 2000, marked on the chart; the median year is 32 days.

Longest dry spell (CDD) at Richardson by year
Year	Longest dry spell (CDD)
1946	17 days
1947	20 days
1948	32 days
1950	62 days
1951	36 days
1952	59 days
1953	47 days
1954	38 days
1955	47 days
1956	50 days
1957	48 days
1958	40 days
1959	31 days
1960	33 days
1961	34 days
1962	28 days
1963	35 days
1964	41 days
1965	31 days
1966	40 days
1967	31 days
1968	17 days
1969	32 days
1970	37 days
1971	33 days
1972	37 days
1973	27 days
1974	45 days
1975	48 days
1976	28 days
1977	32 days
1978	46 days
1979	27 days
1980	49 days
1981	22 days
1982	22 days
1983	23 days
1984	22 days
1985	53 days
1986	32 days
1987	29 days
1988	22 days
1989	38 days
1990	33 days
1991	32 days
1992	21 days
1993	39 days
1994	34 days
1995	36 days
1996	31 days
1997	27 days
1998	68 days
1999	33 days
2000	94 days
2001	27 days
2002	39 days
2003	33 days
2004	21 days
2005	32 days
2006	39 days
2007	32 days
2008	22 days
2009	23 days
2010	27 days
2011	32 days
2012	60 days
2013	25 days
2014	25 days
2015	37 days
2016	30 days
2017	28 days
2018	27 days
2019	40 days
2020	26 days
2021	20 days
2022	51 days
2023	38 days
2024	40 days
2025	25 days
2026	21 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

72 years, 1951 to 2025

A day with at least 80.7 mm (3.2 in) of rain is expected about once in 2 years. A day with at least 168.0 mm (6.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Richardson: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	80.7 mm (3.2 in)
5 years	105.7 mm (4.2 in)
10 years	121.5 mm (4.8 in)
25 years	140.9 mm (5.5 in)
50 years	154.7 mm (6.1 in)
100 years	168.0 mm (6.6 in)	Longer than the 72 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, 72 years of values from 1951 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: 197.9 mm (7.8 in) in 1964; 137.7 mm (5.4 in) in 1989; 136.9 mm (5.4 in) in 2010.

Download the Data

Data for Richardson standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Richardson 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).