Richland Weather Records (USC00357160)

Record envelope, standing records and threshold days for Richland (USC00357160), Oregon, United States, with 123 years of record.

Key Facts for Richland

Richland (USC00357160) is a weather station in Oregon, United States at 44.77 latitude and -117.16 longitude, 675 m (2,215 ft) above sea level.
The station reports from 1893 to 2015, 123 years of record.
1,464 records set at Richland still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Richland set a daily record low maximum temperature of 15.0 C (59.0 F) on 19 June 2011.

About the Station

Location: Oregon, United States, 44.77 latitude, -117.16 longitude.
Elevation: 675 m (2,215 ft).
Period of record: 1893 to 2015, 123 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

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 Richland. 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 Richland, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.7 C (62.1 F)	-32.8 C (-27.0 F)	n/a	n/a
Feb	24.4 C (75.9 F)	-32.2 C (-26.0 F)	n/a	n/a
Mar	29.4 C (84.9 F)	-22.8 C (-9.0 F)	n/a	n/a
Apr	33.3 C (91.9 F)	-10.6 C (12.9 F)	n/a	n/a
May	36.7 C (98.1 F)	-11.1 C (12.0 F)	n/a	n/a
Jun	40.6 C (105.1 F)	-7.2 C (19.0 F)	n/a	n/a
Jul	43.3 C (109.9 F)	-6.7 C (19.9 F)	n/a	n/a
Aug	42.8 C (109.0 F)	-0.6 C (30.9 F)	n/a	n/a
Sep	40.6 C (105.1 F)	-7.8 C (18.0 F)	n/a	n/a
Oct	33.3 C (91.9 F)	-14.4 C (6.1 F)	n/a	n/a
Nov	25.6 C (78.1 F)	-21.7 C (-7.1 F)	n/a	n/a
Dec	18.3 C (64.9 F)	-30.0 C (-22.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Richland still stand. 1983 holds the most, with 59.

Standing records at Richland by the year they were set
Year set	Standing records
1893	19
1894	11
1895	5
1896	36
1897	25
1898	15
1899	32
1900	33
1901	10
1905	2
1906	29
1907	13
1908	27
1909	15
1910	9
1911	12
1912	16
1913	9
1914	4
1915	6
1916	21
1917	29
1918	17
1919	18
1920	7
1921	14
1922	16
1923	2
1945	15
1946	8
1947	19
1948	10
1949	23
1950	26
1951	10
1952	29
1953	23
1954	18
1955	41
1956	13
1957	29
1958	18
1959	12
1960	25
1961	26
1962	21
1963	20
1964	15
1965	17
1966	22
1967	8
1968	7
1969	11
1970	6
1971	4
1972	18
1973	8
1974	27
1975	11
1976	7
1977	6
1978	10
1979	16
1980	6
1982	6
1983	59
1984	33
1985	45
1986	2
1987	16
1988	9
1989	26
1990	15
1991	4
1992	20
1993	10
1994	6
1995	12
1996	12
1997	2
1998	4
1999	8
2000	15
2001	26
2002	12
2003	12
2004	8
2005	7
2006	15
2007	5
2008	9
2009	7
2010	12
2011	10

All-Time Record Progression

12 new records

12 all-time records were set at Richland between 26 January 1957 and 28 November 2001. Each dot is a new record.

When Richland set new all-time records
Date	Kind	Detail
1957-01-26	Record low minimum temperature	Record low minimum temperature -31.1 C (-24.0 F)
1957-01-27	Record low minimum temperature	Record low minimum temperature -32.2 C (-26.0 F)
1966-08-03	Record high minimum temperature	Record high minimum temperature 23.9 C (75.0 F)
1966-08-04	Record high minimum temperature	Record high minimum temperature 24.4 C (75.9 F)
1979-01-31	Record low minimum temperature	Record low minimum temperature -32.8 C (-27.0 F)
1983-08-07	Record high minimum temperature	Record high minimum temperature 27.8 C (82.0 F)
1984-01-22	Record snow depth	Record snow depth 66.0 cm (26.0 in)
1984-01-25	Record daily precipitation	Record daily precipitation 76.2 mm (3.0 in)
1984-07-17	Record high minimum temperature	Record high minimum temperature 31.1 C (88.0 F)
1984-07-19	Record high minimum temperature	Record high minimum temperature 32.2 C (90.0 F)
1989-02-05	Record low maximum temperature	Record low maximum temperature -17.2 C (1.0 F)
2001-11-28	Record daily precipitation	Record daily precipitation 101.6 mm (4.0 in)

Wettest Day of Each Month

Nov: 101.6 mm (4.0 in)

The wettest day on record for each calendar month at Richland. The most was 101.6 mm (4.0 in) on 28 November 2001.

Record daily precipitation for each month at Richland
Month	Record daily precipitation (mm)	Date
Jan	76.2 mm (3.0 in)	25 January 1984
Feb	44.5 mm (1.8 in)	2 February 1916
Mar	34.3 mm (1.4 in)	27 March 1983
Apr	32.8 mm (1.3 in)	21 April 2010
May	40.6 mm (1.6 in)	26 May 1998
Jun	51.6 mm (2.0 in)	12 June 1993
Jul	37.6 mm (1.5 in)	2 July 1982
Aug	40.6 mm (1.6 in)	7 August 2009
Sep	43.2 mm (1.7 in)	23 September 1917
Oct	31.5 mm (1.2 in)	29 October 1985
Nov	101.6 mm (4.0 in)	28 November 2001
Dec	57.2 mm (2.3 in)	5 December 1995

Period of Record Coverage

1893 to 2011

95 years of record at Richland, 1893 to 2011. 37 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1895, 1897, 1898, 1901, 1905, 1906 and others.

Days with data per year at Richland
Year	Days with data	Share of year	Complete
1893	315	86%	No
1894	239	65%	No
1895	273	75%	No
1896	333	91%	Yes
1897	238	65%	No
1898	259	71%	No
1899	364	100%	Yes
1900	359	98%	Yes
1901	306	84%	No
1905	73	20%	No
1906	320	88%	No
1907	350	96%	Yes
1908	308	84%	No
1909	315	86%	No
1910	362	99%	Yes
1911	330	90%	Yes
1912	352	96%	Yes
1913	134	37%	No
1914	191	52%	No
1915	358	98%	Yes
1916	357	98%	Yes
1917	362	99%	Yes
1918	362	99%	Yes
1919	351	96%	Yes
1920	363	99%	Yes
1921	304	83%	No
1922	298	82%	No
1923	27	7%	No
1944	61	17%	No
1945	356	98%	Yes
1946	361	99%	Yes
1947	364	100%	Yes
1948	355	97%	Yes
1949	332	91%	Yes
1950	328	90%	No
1951	305	84%	No
1952	351	96%	Yes
1953	308	84%	No
1954	268	73%	No
1955	331	91%	Yes
1956	317	87%	No
1957	289	79%	No
1958	263	72%	No
1959	353	97%	Yes
1960	345	94%	Yes
1961	346	95%	Yes
1962	353	97%	Yes
1963	322	88%	No
1964	362	99%	Yes
1965	363	99%	Yes
1966	354	97%	Yes
1967	347	95%	Yes
1968	354	97%	Yes
1969	355	97%	Yes
1970	364	100%	Yes
1971	358	98%	Yes
1972	356	97%	Yes
1973	363	99%	Yes
1974	365	100%	Yes
1975	363	99%	Yes
1976	361	99%	Yes
1977	287	79%	No
1978	362	99%	Yes
1979	359	98%	Yes
1980	212	58%	No
1982	255	70%	No
1983	347	95%	Yes
1984	302	83%	No
1985	263	72%	No
1986	144	39%	No
1987	363	99%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	364	100%	Yes
1991	364	100%	Yes
1992	363	99%	Yes
1993	310	85%	No
1994	361	99%	Yes
1995	357	98%	Yes
1996	359	98%	Yes
1997	210	58%	No
1998	207	57%	No
1999	273	75%	No
2000	360	98%	Yes
2001	301	82%	No
2002	208	57%	No
2003	330	90%	Yes
2004	354	97%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	363	99%	Yes
2008	364	99%	Yes
2009	363	99%	Yes
2010	365	100%	Yes
2011	304	83%	No

Latest Records

Latest records at Richland
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
19 June 2011	Richland, US	daily low max	15.0 C (59.0 F)	1.7 C (3.1 F)	16 years	17 of 100 (Routine)
3 June 2011	Richland, US	daily low max	12.8 C (55.0 F)	1.1 C (2.0 F)	93 years	40 of 100 (Notable)
28 May 2011	Richland, US	daily low max	13.3 C (55.9 F)	2.3 C (4.1 F)	4 years	15 of 100 (Routine)
24 May 2011	Richland, US	daily low max	10.6 C (51.1 F)	2.2 C (4.0 F)	94 years	42 of 100 (Notable)
29 April 2011	Richland, US	daily low max	8.9 C (48.0 F)	0.5 C (0.9 F)	20 years	16 of 100 (Routine)
20 April 2011	Richland, US	daily low max	5.6 C (42.1 F)	4.4 C (7.9 F)	2 years	18 of 100 (Routine)
9 March 2011	Richland, US	daily rain	6.4 mm (0.25 in)	3.4 mm (0.13 in)	36 years	20 of 100 (Routine)
9 March 2011	Richland, US	daily low max	3.9 C (39.0 F)	0.5 C (0.9 F)	40 years	23 of 100 (Routine)
27 February 2011	Richland, US	daily low max	-3.9 C (25.0 F)	3.3 C (5.9 F)	17 years	21 of 100 (Routine)
26 February 2011	Richland, US	daily low max (Tie)	-1.1 C (30.0 F)	tie	48 years	6 of 100 (Routine)
24 February 2011	Richland, US	daily low min	-16.7 C (1.9 F)	5.6 C (10.1 F)	100 years	51 of 100 (Notable)
20 February 2011	Richland, US	daily snowfall	11.4 cm (4.5 in)	8.9 cm (3.5 in)	91 years	56 of 100 (Notable)
15 February 2011	Richland, US	daily high min	5.6 C (42.1 F)	3.4 C (6.1 F)	64 years	36 of 100 (Notable)
17 January 2011	Richland, US	daily rain	14.0 mm (0.6 in)	3.8 mm (0.15 in)	97 years	20 of 100 (Routine)
12 December 2010	Richland, US	daily rain	27.2 mm (1.1 in)	15.8 mm (0.6 in)	27 years	46 of 100 (Notable)
2 December 2010	Richland, US	daily snowfall	3.8 cm (1.5 in)	1.3 cm (0.5 in)	27 years	20 of 100 (Routine)
1 December 2010	Richland, US	daily snowfall	20.3 cm (8.0 in)	17.8 cm (7.0 in)	55 years	66 of 100 (Major)
26 November 2010	Richland, US	daily low max (Tie)	-3.9 C (25.0 F)	tie	16 years	3 of 100 (Routine)
25 November 2010	Richland, US	daily low max	-6.1 C (21.0 F)	1.7 C (3.1 F)	16 years	18 of 100 (Routine)
24 November 2010	Richland, US	daily low min	-16.1 C (3.0 F)	2.8 C (5.0 F)	16 years	21 of 100 (Routine)

Climate Trend

49 complete years, 1899 to 2010

One stripe for each of 49 complete years at Richland, 1899 to 2010. Blue stripes are years cooler than the station's own mean of 10.1 C (50.1 F); red stripes are warmer. The coolest year was 1899, at 8.1 C (46.6 F), and the warmest was 1966, at 12.5 C (54.6 F). The strongest colour marks a difference of 2.5 C (4.5 F).

Annual mean temperature at Richland as warming stripes, 1899 to 2010
Year	Annual mean temperature	Difference from the station mean
1899	8.1 C	-1.94 C
1900	8.7 C	-1.40 C
1910	9.7 C	-0.40 C
1911	8.7 C	-1.38 C
1912	8.7 C	-1.37 C
1915	10.5 C	+0.45 C
1916	8.8 C	-1.27 C
1917	9.6 C	-0.45 C
1918	10.6 C	+0.59 C
1919	9.6 C	-0.47 C
1920	9.7 C	-0.37 C
1945	10.0 C	-0.09 C
1946	9.9 C	-0.13 C
1947	10.7 C	+0.62 C
1948	10.0 C	-0.06 C
1959	10.9 C	+0.85 C
1960	11.6 C	+1.53 C
1962	10.8 C	+0.73 C
1964	10.4 C	+0.36 C
1965	11.4 C	+1.33 C
1966	12.5 C	+2.48 C
1968	11.0 C	+0.93 C
1969	10.7 C	+0.69 C
1970	10.8 C	+0.76 C
1971	10.2 C	+0.12 C
1972	10.0 C	-0.07 C
1973	11.1 C	+1.07 C
1974	10.1 C	+0.07 C
1975	9.5 C	-0.57 C
1976	10.3 C	+0.20 C
1978	10.4 C	+0.33 C
1979	10.5 C	+0.40 C
1983	10.4 C	+0.30 C
1987	10.7 C	+0.68 C
1988	10.1 C	+0.04 C
1989	8.6 C	-1.44 C
1990	9.9 C	-0.11 C
1991	9.6 C	-0.50 C
1992	10.7 C	+0.65 C
1994	10.2 C	+0.11 C
1995	10.2 C	+0.15 C
1996	10.2 C	+0.10 C
2004	10.1 C	+0.07 C
2005	9.5 C	-0.59 C
2006	10.1 C	+0.02 C
2007	10.2 C	+0.12 C
2008	8.9 C	-1.17 C
2009	8.8 C	-1.21 C
2010	9.5 C	-0.54 C

The fitted trend in annual mean temperature here over 1899 to 2010 is 0.06 C (-0.01 to 0.14) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.11 F (-0.02 to 0.24) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Richland
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.06 C (-0.01 to 0.14) per decade	0.11 F (-0.02 to 0.24) per decade	1899 to 2010	49	Not clearly different from zero
Mean daily maximum	0.01 C (-0.10 to 0.12) per decade	0.01 F (-0.18 to 0.21) per decade	1899 to 2010	49	Not clearly different from zero
Mean daily minimum	0.1 C (0.1 to 0.2) per decade	0.2 F (0.1 to 0.3) per decade	1899 to 2010	49	Rise

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

1893 to 2015

Yearly extremes at Richland: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.3 C (109.9 F)	1893	39.4 C (102.9 F)	95
Coldest night (TNn)	-32.8 C (-27.0 F)	1979	-19.4 C (-2.9 F)	95
Wettest day (Rx1day)	101.6 mm (4.0 in)	2001	20.6 mm (0.8 in)	96
Wettest five days (Rx5day)	111.3 mm (4.4 in)	1983	32.3 mm (1.3 in)	95
Longest dry spell (CDD)	152 days	1896	45 days	95

Hottest day (TXx)

The hottest day of the year at Richland, 1893 to 2015. The record is 43.3 C (109.9 F) in 1893, marked on the chart; the median year is 39.4 C (102.9 F).

Hottest day (TXx) at Richland by year
Year	Hottest day (TXx)
1893	43.3 C (109.9 F)
1894	40.0 C (104.0 F)
1895	37.8 C (100.0 F)
1896	41.7 C (107.1 F)
1897	38.3 C (100.9 F)
1898	39.4 C (102.9 F)
1899	38.9 C (102.0 F)
1900	39.4 C (102.9 F)
1901	37.8 C (100.0 F)
1905	18.9 C (66.0 F)
1906	38.9 C (102.0 F)
1907	38.9 C (102.0 F)
1908	40.6 C (105.1 F)
1909	37.8 C (100.0 F)
1910	37.8 C (100.0 F)
1911	38.9 C (102.0 F)
1912	36.7 C (98.1 F)
1913	32.2 C (90.0 F)
1914	38.9 C (102.0 F)
1915	41.1 C (106.0 F)
1916	39.4 C (102.9 F)
1917	40.6 C (105.1 F)
1918	40.6 C (105.1 F)
1919	41.1 C (106.0 F)
1920	40.0 C (104.0 F)
1921	37.2 C (99.0 F)
1922	40.6 C (105.1 F)
1923	35.0 C (95.0 F)
1944	16.1 C (61.0 F)
1945	37.8 C (100.0 F)
1946	40.0 C (104.0 F)
1947	38.3 C (100.9 F)
1948	37.2 C (99.0 F)
1949	39.4 C (102.9 F)
1950	40.0 C (104.0 F)
1951	40.6 C (105.1 F)
1952	39.4 C (102.9 F)
1953	41.1 C (106.0 F)
1954	38.9 C (102.0 F)
1955	41.1 C (106.0 F)
1956	41.1 C (106.0 F)
1957	40.0 C (104.0 F)
1958	41.1 C (106.0 F)
1959	40.6 C (105.1 F)
1960	41.7 C (107.1 F)
1961	42.8 C (109.0 F)
1962	39.4 C (102.9 F)
1963	38.9 C (102.0 F)
1964	37.8 C (100.0 F)
1965	38.3 C (100.9 F)
1966	40.6 C (105.1 F)
1967	42.2 C (108.0 F)
1968	40.0 C (104.0 F)
1969	39.4 C (102.9 F)
1970	38.9 C (102.0 F)
1971	40.6 C (105.1 F)
1972	41.1 C (106.0 F)
1973	38.3 C (100.9 F)
1974	39.4 C (102.9 F)
1975	40.6 C (105.1 F)
1976	40.0 C (104.0 F)
1977	39.4 C (102.9 F)
1978	38.3 C (100.9 F)
1979	41.1 C (106.0 F)
1980	41.1 C (106.0 F)
1982	39.4 C (102.9 F)
1983	37.8 C (100.0 F)
1984	37.8 C (100.0 F)
1985	41.7 C (107.1 F)
1986	38.9 C (102.0 F)
1987	39.4 C (102.9 F)
1988	39.4 C (102.9 F)
1989	38.9 C (102.0 F)
1990	41.1 C (106.0 F)
1991	38.9 C (102.0 F)
1992	40.6 C (105.1 F)
1993	35.0 C (95.0 F)
1994	40.6 C (105.1 F)
1995	36.1 C (97.0 F)
1996	41.1 C (106.0 F)
1997	36.1 C (97.0 F)
1998	40.0 C (104.0 F)
1999	38.9 C (102.0 F)
2000	40.0 C (104.0 F)
2001	40.0 C (104.0 F)
2002	33.9 C (93.0 F)
2003	40.0 C (104.0 F)
2004	40.0 C (104.0 F)
2005	39.4 C (102.9 F)
2006	41.7 C (107.1 F)
2007	41.7 C (107.1 F)
2008	40.0 C (104.0 F)
2009	39.4 C (102.9 F)
2010	38.9 C (102.0 F)
2011	37.2 C (99.0 F)
2015	n/a

Coldest night (TNn)

The coldest night of the year at Richland, 1893 to 2015. The record is -32.8 C (-27.0 F) in 1979, marked on the chart; the median year is -19.4 C (-2.9 F).

Coldest night (TNn) at Richland by year
Year	Coldest night (TNn)
1893	-22.2 C (-8.0 F)
1894	-17.2 C (1.0 F)
1895	-15.0 C (5.0 F)
1896	-21.7 C (-7.1 F)
1897	-12.8 C (9.0 F)
1898	-23.3 C (-9.9 F)
1899	-23.9 C (-11.0 F)
1900	-16.1 C (3.0 F)
1901	-17.2 C (1.0 F)
1905	-12.8 C (9.0 F)
1906	-22.8 C (-9.0 F)
1907	-17.8 C (0.0 F)
1908	-18.3 C (-0.9 F)
1909	-17.8 C (0.0 F)
1910	-24.4 C (-11.9 F)
1911	-16.7 C (1.9 F)
1912	-30.0 C (-22.0 F)
1913	-19.4 C (-2.9 F)
1914	-18.9 C (-2.0 F)
1915	-20.6 C (-5.1 F)
1916	-27.2 C (-17.0 F)
1917	-25.6 C (-14.1 F)
1918	-17.2 C (1.0 F)
1919	-30.0 C (-22.0 F)
1920	-19.4 C (-2.9 F)
1921	-12.8 C (9.0 F)
1922	-26.1 C (-15.0 F)
1923	-1.7 C (28.9 F)
1944	-15.0 C (5.0 F)
1945	-20.0 C (-4.0 F)
1946	-13.9 C (7.0 F)
1947	-22.2 C (-8.0 F)
1948	-26.7 C (-16.1 F)
1949	-30.0 C (-22.0 F)
1950	-26.7 C (-16.1 F)
1951	-15.0 C (5.0 F)
1952	-21.1 C (-6.0 F)
1953	-20.0 C (-4.0 F)
1954	-20.6 C (-5.1 F)
1955	-21.1 C (-6.0 F)
1956	-22.2 C (-8.0 F)
1957	-32.2 C (-26.0 F)
1958	-13.3 C (8.1 F)
1959	-22.2 C (-8.0 F)
1960	-17.2 C (1.0 F)
1961	-17.2 C (1.0 F)
1962	-30.6 C (-23.1 F)
1963	-22.2 C (-8.0 F)
1964	-22.8 C (-9.0 F)
1965	-18.9 C (-2.0 F)
1966	-12.8 C (9.0 F)
1967	-20.0 C (-4.0 F)
1968	-17.2 C (1.0 F)
1969	-15.0 C (5.0 F)
1970	-15.6 C (3.9 F)
1971	-16.7 C (1.9 F)
1972	-26.1 C (-15.0 F)
1973	-17.2 C (1.0 F)
1974	-28.9 C (-20.0 F)
1975	-20.6 C (-5.1 F)
1976	-17.8 C (0.0 F)
1977	-23.3 C (-9.9 F)
1978	-24.4 C (-11.9 F)
1979	-32.8 C (-27.0 F)
1980	-20.0 C (-4.0 F)
1982	-16.7 C (1.9 F)
1983	-29.4 C (-20.9 F)
1984	-23.9 C (-11.0 F)
1985	-20.0 C (-4.0 F)
1986	-11.1 C (12.0 F)
1987	-17.2 C (1.0 F)
1988	-22.2 C (-8.0 F)
1989	-32.2 C (-26.0 F)
1990	-26.7 C (-16.1 F)
1991	-22.2 C (-8.0 F)
1992	-22.8 C (-9.0 F)
1993	-21.1 C (-6.0 F)
1994	-15.0 C (5.0 F)
1995	-15.6 C (3.9 F)
1996	-19.4 C (-2.9 F)
1997	-13.9 C (7.0 F)
1998	-11.7 C (10.9 F)
1999	-18.3 C (-0.9 F)
2000	-11.7 C (10.9 F)
2001	-15.6 C (3.9 F)
2002	-12.8 C (9.0 F)
2003	-15.0 C (5.0 F)
2004	-21.1 C (-6.0 F)
2005	-15.0 C (5.0 F)
2006	-14.4 C (6.1 F)
2007	-15.6 C (3.9 F)
2008	-21.1 C (-6.0 F)
2009	-20.0 C (-4.0 F)
2010	-16.1 C (3.0 F)
2011	-16.7 C (1.9 F)
2015	n/a

Wettest day (Rx1day)

The wettest day of the year at Richland, 1893 to 2015. The record is 101.6 mm (4.0 in) in 2001, marked on the chart; the median year is 20.6 mm (0.8 in).

Wettest day (Rx1day) at Richland by year
Year	Wettest day (Rx1day)
1893	12.7 mm (0.5 in)
1894	27.9 mm (1.1 in)
1895	17.8 mm (0.7 in)
1896	30.5 mm (1.2 in)
1897	10.2 mm (0.4 in)
1898	29.2 mm (1.1 in)
1899	19.1 mm (0.8 in)
1900	19.1 mm (0.8 in)
1901	29.7 mm (1.2 in)
1905	7.6 mm (0.30 in)
1906	23.6 mm (0.9 in)
1907	12.7 mm (0.5 in)
1908	14.2 mm (0.6 in)
1909	27.9 mm (1.1 in)
1910	24.4 mm (1.0 in)
1911	18.5 mm (0.7 in)
1912	25.4 mm (1.0 in)
1913	17.8 mm (0.7 in)
1914	19.1 mm (0.8 in)
1915	19.6 mm (0.8 in)
1916	44.5 mm (1.8 in)
1917	43.2 mm (1.7 in)
1918	25.1 mm (1.0 in)
1919	27.2 mm (1.1 in)
1920	13.5 mm (0.5 in)
1921	31.8 mm (1.3 in)
1922	10.2 mm (0.4 in)
1923	10.2 mm (0.4 in)
1944	12.4 mm (0.5 in)
1945	24.1 mm (0.9 in)
1946	20.3 mm (0.8 in)
1947	16.5 mm (0.6 in)
1948	19.3 mm (0.8 in)
1949	19.3 mm (0.8 in)
1950	13.2 mm (0.5 in)
1951	23.6 mm (0.9 in)
1952	30.5 mm (1.2 in)
1953	21.8 mm (0.9 in)
1954	19.6 mm (0.8 in)
1955	24.1 mm (0.9 in)
1956	38.1 mm (1.5 in)
1957	18.8 mm (0.7 in)
1958	34.3 mm (1.4 in)
1959	27.9 mm (1.1 in)
1960	20.8 mm (0.8 in)
1961	16.5 mm (0.6 in)
1962	25.4 mm (1.0 in)
1963	21.6 mm (0.9 in)
1964	16.5 mm (0.6 in)
1965	17.8 mm (0.7 in)
1966	16.0 mm (0.6 in)
1967	12.7 mm (0.5 in)
1968	24.9 mm (1.0 in)
1969	24.1 mm (0.9 in)
1970	16.5 mm (0.6 in)
1971	29.0 mm (1.1 in)
1972	16.0 mm (0.6 in)
1973	17.5 mm (0.7 in)
1974	17.5 mm (0.7 in)
1975	19.1 mm (0.8 in)
1976	20.3 mm (0.8 in)
1977	12.7 mm (0.5 in)
1978	27.4 mm (1.1 in)
1979	16.8 mm (0.7 in)
1980	25.7 mm (1.0 in)
1982	37.6 mm (1.5 in)
1983	38.1 mm (1.5 in)
1984	76.2 mm (3.0 in)
1985	31.5 mm (1.2 in)
1986	16.0 mm (0.6 in)
1987	25.7 mm (1.0 in)
1988	25.4 mm (1.0 in)
1989	15.2 mm (0.6 in)
1990	38.1 mm (1.5 in)
1991	25.4 mm (1.0 in)
1992	19.1 mm (0.8 in)
1993	51.6 mm (2.0 in)
1994	16.5 mm (0.6 in)
1995	57.2 mm (2.3 in)
1996	12.7 mm (0.5 in)
1997	17.3 mm (0.7 in)
1998	40.6 mm (1.6 in)
1999	35.6 mm (1.4 in)
2000	3.8 mm (0.15 in)
2001	101.6 mm (4.0 in)
2002	50.8 mm (2.0 in)
2003	1.5 mm (0.06 in)
2004	15.5 mm (0.6 in)
2005	40.6 mm (1.6 in)
2006	30.5 mm (1.2 in)
2007	19.1 mm (0.8 in)
2008	22.9 mm (0.9 in)
2009	40.6 mm (1.6 in)
2010	32.8 mm (1.3 in)
2011	16.5 mm (0.6 in)
2015	3.3 mm (0.13 in)

Wettest five days (Rx5day)

The wettest five days of the year at Richland, 1893 to 2015. The record is 111.3 mm (4.4 in) in 1983, marked on the chart; the median year is 32.3 mm (1.3 in).

Wettest five days (Rx5day) at Richland by year
Year	Wettest five days (Rx5day)
1893	22.8 mm (0.9 in)
1894	43.1 mm (1.7 in)
1895	28.0 mm (1.1 in)
1896	40.7 mm (1.6 in)
1897	14.0 mm (0.6 in)
1898	32.2 mm (1.3 in)
1899	34.3 mm (1.4 in)
1900	26.0 mm (1.0 in)
1901	39.9 mm (1.6 in)
1905	10.4 mm (0.4 in)
1906	25.4 mm (1.0 in)
1907	22.1 mm (0.9 in)
1908	16.6 mm (0.7 in)
1909	32.0 mm (1.3 in)
1910	31.4 mm (1.2 in)
1911	26.3 mm (1.0 in)
1912	37.1 mm (1.5 in)
1913	22.8 mm (0.9 in)
1914	33.1 mm (1.3 in)
1915	28.8 mm (1.1 in)
1916	50.8 mm (2.0 in)
1917	53.1 mm (2.1 in)
1918	29.0 mm (1.1 in)
1919	59.5 mm (2.3 in)
1920	25.9 mm (1.0 in)
1921	48.3 mm (1.9 in)
1922	21.3 mm (0.8 in)
1923	12.7 mm (0.5 in)
1944	29.4 mm (1.2 in)
1945	31.3 mm (1.2 in)
1946	29.1 mm (1.1 in)
1947	27.9 mm (1.1 in)
1948	31.0 mm (1.2 in)
1949	20.4 mm (0.8 in)
1950	29.7 mm (1.2 in)
1951	28.9 mm (1.1 in)
1952	30.5 mm (1.2 in)
1953	30.1 mm (1.2 in)
1954	31.8 mm (1.3 in)
1955	26.0 mm (1.0 in)
1956	38.4 mm (1.5 in)
1957	26.4 mm (1.0 in)
1958	41.9 mm (1.6 in)
1959	35.5 mm (1.4 in)
1960	36.0 mm (1.4 in)
1961	19.6 mm (0.8 in)
1962	40.7 mm (1.6 in)
1963	28.0 mm (1.1 in)
1964	35.7 mm (1.4 in)
1965	44.8 mm (1.8 in)
1966	39.3 mm (1.5 in)
1967	25.4 mm (1.0 in)
1968	39.6 mm (1.6 in)
1969	30.5 mm (1.2 in)
1970	44.3 mm (1.7 in)
1971	40.6 mm (1.6 in)
1972	29.7 mm (1.2 in)
1973	31.8 mm (1.3 in)
1974	29.0 mm (1.1 in)
1975	33.5 mm (1.3 in)
1976	36.6 mm (1.4 in)
1977	35.1 mm (1.4 in)
1978	51.4 mm (2.0 in)
1979	38.3 mm (1.5 in)
1980	32.3 mm (1.3 in)
1982	82.8 mm (3.3 in)
1983	111.3 mm (4.4 in)
1984	102.4 mm (4.0 in)
1985	46.5 mm (1.8 in)
1986	25.6 mm (1.0 in)
1987	31.3 mm (1.2 in)
1988	38.1 mm (1.5 in)
1989	40.6 mm (1.6 in)
1990	50.9 mm (2.0 in)
1991	55.9 mm (2.2 in)
1992	34.1 mm (1.3 in)
1993	64.6 mm (2.5 in)
1994	26.9 mm (1.1 in)
1995	57.8 mm (2.3 in)
1996	29.5 mm (1.2 in)
1997	27.5 mm (1.1 in)
1998	83.1 mm (3.3 in)
1999	70.5 mm (2.8 in)
2000	3.8 mm (0.15 in)
2001	7.6 mm (0.30 in)
2002	52.4 mm (2.1 in)
2003	51.9 mm (2.0 in)
2004	28.6 mm (1.1 in)
2005	54.6 mm (2.1 in)
2006	43.2 mm (1.7 in)
2007	51.0 mm (2.0 in)
2008	49.6 mm (2.0 in)
2009	48.8 mm (1.9 in)
2010	38.2 mm (1.5 in)
2011	25.3 mm (1.0 in)
2015	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Richland, 1893 to 2015. The record is 152 days in 1896, marked on the chart; the median year is 45 days.

Longest dry spell (CDD) at Richland by year
Year	Longest dry spell (CDD)
1893	22 days
1894	31 days
1895	104 days
1896	152 days
1897	40 days
1898	47 days
1899	49 days
1900	64 days
1901	64 days
1905	43 days
1906	31 days
1907	43 days
1908	72 days
1909	32 days
1910	53 days
1911	31 days
1912	73 days
1913	45 days
1914	31 days
1915	50 days
1916	30 days
1917	69 days
1918	87 days
1919	69 days
1920	26 days
1921	24 days
1922	33 days
1923	15 days
1944	18 days
1945	26 days
1946	29 days
1947	72 days
1948	27 days
1949	114 days
1950	75 days
1951	54 days
1952	61 days
1953	66 days
1954	35 days
1955	52 days
1956	44 days
1957	98 days
1958	40 days
1959	82 days
1960	61 days
1961	39 days
1962	60 days
1963	41 days
1964	35 days
1965	38 days
1966	47 days
1967	33 days
1968	44 days
1969	76 days
1970	37 days
1971	36 days
1972	34 days
1973	35 days
1974	63 days
1975	43 days
1976	59 days
1977	40 days
1978	58 days
1979	52 days
1980	22 days
1982	20 days
1983	25 days
1984	24 days
1985	48 days
1986	26 days
1987	85 days
1988	130 days
1989	55 days
1990	39 days
1991	91 days
1992	50 days
1993	52 days
1994	121 days
1995	25 days
1996	33 days
1997	18 days
1998	35 days
1999	49 days
2000	133 days
2001	99 days
2002	76 days
2003	70 days
2004	33 days
2005	75 days
2006	39 days
2007	59 days
2008	31 days
2009	34 days
2010	67 days
2011	100 days
2015	n/a

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

49 years with a frost

Across 49 years with a frost, the median last spring frost at Richland falls on 17 May and the median first autumn frost on 24 September, which leaves a median of 131 days between them.

Fitted over all years, the growing season changes by +2.3 days per decade at this station.

Frost dates and growing season at Richland
Measure	Median, all years	Earliest period	Recent period (1965 to 2010)	Recent against earliest	Fitted trend
Last spring frost	17 May	n/a	15 May	n/a	-0.8 days per decade
First autumn frost	24 September	n/a	29 September	n/a	+1.5 days per decade
Growing days	131 days	n/a	134 days	n/a	+2.3 days per decade

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

58 years, 1896 to 2010

A day with at least 22.5 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 59.9 mm (2.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Richland: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	22.5 mm (0.9 in)
5 years	31.4 mm (1.2 in)
10 years	37.7 mm (1.5 in)
25 years	46.2 mm (1.8 in)
50 years	52.9 mm (2.1 in)
100 years	59.9 mm (2.4 in)	Longer than the 58 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, 58 years of values from 1896 to 2010.

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: 57.2 mm (2.3 in) in 1995; 51.6 mm (2.0 in) in 1993; 44.5 mm (1.8 in) in 1916.

Download the Data

Data for Richland standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Richland 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).