Riverhead Rsch Farm Weather Records (USC00307134)

Record envelope, standing records and threshold days for Riverhead Rsch Farm (USC00307134), New York, United States, with 89 years of record.

Key Facts for Riverhead Rsch Farm

Riverhead Rsch Farm (USC00307134) is a weather station in New York, United States at 40.96 latitude and -72.72 longitude, 31 m (100 ft) above sea level.
The station reports from 1938 to 2026, 89 years of record.
1,464 records set at Riverhead Rsch Farm still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Riverhead Rsch Farm set a daily record precipitation of 64.0 mm (2.5 in) on 13 September 2026 (provisional).

Provisional Records

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

About the Station

Location: New York, United States, 40.96 latitude, -72.72 longitude.
Elevation: 31 m (100 ft).
Period of record: 1938 to 2026, 89 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

8 days at or beyond a record

The band shows the record high and record low for each calendar day at Riverhead Rsch Farm. The lines show the 2026 daily maximum and minimum. 8 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Riverhead Rsch Farm, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	20.0 C (68.0 F)	-22.2 C (-8.0 F)	11.7 C (53.1 F)	-12.8 C (9.0 F)
Feb	20.0 C (68.0 F)	-21.1 C (-6.0 F)	10.6 C (51.1 F)	-16.1 C (3.0 F)
Mar	28.3 C (82.9 F)	-13.3 C (8.1 F)	23.3 C (73.9 F)	-7.8 C (18.0 F)
Apr	33.3 C (91.9 F)	-7.8 C (18.0 F)	28.3 C (82.9 F)	-2.2 C (28.0 F)
May	35.6 C (96.1 F)	-0.6 C (30.9 F)	32.8 C (91.0 F)	4.4 C (39.9 F)
Jun	36.7 C (98.1 F)	3.9 C (39.0 F)	33.3 C (91.9 F)	7.2 C (45.0 F)
Jul	37.8 C (100.0 F)	8.3 C (46.9 F)	37.2 C (99.0 F)	12.8 C (55.0 F)
Aug	37.2 C (99.0 F)	7.2 C (45.0 F)	32.2 C (90.0 F)	15.0 C (59.0 F)
Sep	36.7 C (98.1 F)	1.1 C (34.0 F)	28.9 C (84.0 F)	10.6 C (51.1 F)
Oct	32.8 C (91.0 F)	-4.4 C (24.1 F)	n/a	n/a
Nov	26.7 C (80.1 F)	-8.3 C (17.1 F)	n/a	n/a
Dec	24.4 C (75.9 F)	-18.9 C (-2.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Riverhead Rsch Farm still stand. 1940 holds the most, with 35.

Standing records at Riverhead Rsch Farm by the year they were set
Year set	Standing records
1938	18
1939	4
1940	35
1941	12
1942	19
1943	18
1944	14
1945	30
1946	16
1947	22
1948	21
1949	16
1950	17
1951	16
1952	10
1953	18
1954	15
1955	18
1956	24
1957	16
1958	19
1959	16
1960	16
1961	23
1962	32
1963	21
1964	13
1965	15
1966	20
1967	34
1968	17
1969	15
1970	11
1971	12
1972	14
1973	11
1974	19
1975	10
1976	26
1977	11
1978	7
1979	31
1980	13
1981	18
1982	25
1983	10
1984	19
1985	10
1986	18
1987	20
1988	14
1989	14
1990	23
1991	29
1992	12
1993	16
1994	14
1995	18
1996	12
1997	6
1998	13
1999	14
2000	17
2001	21
2002	16
2003	11
2004	9
2005	10
2006	11
2007	16
2008	12
2009	15
2010	18
2011	9
2012	19
2013	5
2014	8
2015	27
2016	21
2017	26
2018	20
2019	12
2020	14
2021	11
2022	18
2023	22
2024	8
2025	10
2026	8

All-Time Record Progression

11 new records

11 all-time records were set at Riverhead Rsch Farm between 6 February 1978 and 23 February 2026. Each dot is a new record.

When Riverhead Rsch Farm set new all-time records
Date	Kind	Detail
1978-02-06	Record daily snowfall	Record daily snowfall 38.1 cm (15.0 in)
1978-02-07	Record snow depth	Record snow depth 63.5 cm (25.0 in)
1981-07-09	Record high minimum temperature	Record high minimum temperature 26.1 C (79.0 F)
1982-01-18	Record low minimum temperature	Record low minimum temperature -22.2 C (-8.0 F)
1983-02-12	Record daily snowfall	Record daily snowfall 40.6 cm (16.0 in)
1991-07-21	Record high maximum temperature	Record high maximum temperature 37.8 C (100.0 F)
1996-07-18	Record high minimum temperature	Record high minimum temperature 27.2 C (81.0 F)
2009-12-20	Record daily snowfall	Record daily snowfall 50.8 cm (20.0 in)
2013-02-09	Record daily snowfall	Record daily snowfall 57.2 cm (22.5 in)
2013-02-09	Record snow depth	Record snow depth 66.0 cm (26.0 in)
2026-02-23	Record daily snowfall	Record daily snowfall 61.0 cm (24.0 in)

Wettest Day of Each Month

Aug: 174.5 mm (6.9 in)

The wettest day on record for each calendar month at Riverhead Rsch Farm. The most was 174.5 mm (6.9 in) on 7 August 1946.

Record daily precipitation for each month at Riverhead Rsch Farm
Month	Record daily precipitation (mm)	Date
Jan	91.4 mm (3.6 in)	21 January 1979
Feb	64.8 mm (2.6 in)	9 February 2013
Mar	135.9 mm (5.4 in)	30 March 2010
Apr	80.8 mm (3.2 in)	13 April 2004
May	76.5 mm (3.0 in)	26 May 2003
Jun	133.9 mm (5.3 in)	5 June 1982
Jul	124.2 mm (4.9 in)	11 July 1959
Aug	174.5 mm (6.9 in)	7 August 1946
Sep	164.1 mm (6.5 in)	11 September 1954
Oct	141.7 mm (5.6 in)	12 October 2005
Nov	88.9 mm (3.5 in)	12 November 1947
Dec	91.9 mm (3.6 in)	12 December 2008

Period of Record Coverage

1938 to 2026

89 years of record at Riverhead Rsch Farm, 1938 to 2026. 4 years have data for under 90 percent of days and are left out of rankings: 1938, 1998, 2014, 2026.

Days with data per year at Riverhead Rsch Farm
Year	Days with data	Share of year	Complete
1938	302	83%	No
1939	355	97%	Yes
1940	357	98%	Yes
1941	360	99%	Yes
1942	365	100%	Yes
1943	365	100%	Yes
1944	365	100%	Yes
1945	364	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	364	100%	Yes
1950	330	90%	Yes
1951	364	100%	Yes
1952	363	99%	Yes
1953	364	100%	Yes
1954	359	98%	Yes
1955	362	99%	Yes
1956	363	99%	Yes
1957	335	92%	Yes
1958	363	99%	Yes
1959	364	100%	Yes
1960	333	91%	Yes
1961	361	99%	Yes
1962	364	100%	Yes
1963	365	100%	Yes
1964	364	99%	Yes
1965	363	99%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	335	92%	Yes
1969	365	100%	Yes
1970	364	100%	Yes
1971	365	100%	Yes
1972	365	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	364	100%	Yes
1976	366	100%	Yes
1977	364	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	365	100%	Yes
1981	362	99%	Yes
1982	359	98%	Yes
1983	354	97%	Yes
1984	361	99%	Yes
1985	361	99%	Yes
1986	360	99%	Yes
1987	363	99%	Yes
1988	365	100%	Yes
1989	361	99%	Yes
1990	362	99%	Yes
1991	360	99%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	364	100%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	364	100%	Yes
1998	303	83%	No
1999	365	100%	Yes
2000	364	99%	Yes
2001	364	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	334	92%	Yes
2006	361	99%	Yes
2007	365	100%	Yes
2008	364	99%	Yes
2009	365	100%	Yes
2010	364	100%	Yes
2011	364	100%	Yes
2012	335	92%	Yes
2013	334	92%	Yes
2014	273	75%	No
2015	365	100%	Yes
2016	366	100%	Yes
2017	365	100%	Yes
2018	365	100%	Yes
2019	364	100%	Yes
2020	366	100%	Yes
2021	365	100%	Yes
2022	365	100%	Yes
2023	365	100%	Yes
2024	366	100%	Yes
2025	365	100%	Yes
2026	260	71%	No

Latest Records

Latest records at Riverhead Rsch Farm
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
13 September 2026	Riverhead Rsch Farm, US	daily rain (Provisional)	64.0 mm (2.5 in)	13.2 mm (0.5 in)	81 years	40 of 100 (Notable)
21 August 2026	Riverhead Rsch Farm, US	daily rain (Provisional)	86.4 mm (3.4 in)	57.7 mm (2.3 in)	28 years	46 of 100 (Notable)
7 August 2026	Riverhead Rsch Farm, US	daily high min (Tie)	24.4 C (75.9 F)	tie	4 years	2 of 100 (Routine)
6 August 2026	Riverhead Rsch Farm, US	daily high min (Tie)	23.3 C (73.9 F)	tie	73 years	7 of 100 (Routine)
6 July 2026	Riverhead Rsch Farm, US	daily rain	50.8 mm (2.0 in)	22.4 mm (0.9 in)	68 years	44 of 100 (Notable)
4 July 2026	Riverhead Rsch Farm, US	daily high max (Tie)	36.7 C (98.1 F)	tie	76 years	7 of 100 (Routine)
4 July 2026	Riverhead Rsch Farm, US	daily high min (Tie)	25.6 C (78.1 F)	tie	24 years	3 of 100 (Routine)
3 July 2026	Riverhead Rsch Farm, US	daily high max	36.7 C (98.1 F)	1.1 C (2.0 F)	76 years	34 of 100 (Routine)
3 July 2026	Riverhead Rsch Farm, US	daily high min	25.0 C (77.0 F)	0.6 C (1.1 F)	24 years	17 of 100 (Routine)
2 July 2026	Riverhead Rsch Farm, US	daily high max	37.2 C (99.0 F)	2.8 C (5.0 F)	84 years	42 of 100 (Notable)
2 July 2026	Riverhead Rsch Farm, US	daily high min (Tie)	22.8 C (73.0 F)	tie	27 years	4 of 100 (Routine)
12 June 2026	Riverhead Rsch Farm, US	daily high max (Tie)	32.8 C (91.0 F)	tie	52 years	5 of 100 (Routine)
2 June 2026	Riverhead Rsch Farm, US	daily low min (Tie)	7.2 C (45.0 F)	tie	60 years	6 of 100 (Routine)
20 May 2026	Riverhead Rsch Farm, US	daily high min	19.4 C (66.9 F)	2.2 C (4.0 F)	40 years	26 of 100 (Routine)
16 April 2026	Riverhead Rsch Farm, US	daily high min	15.6 C (60.1 F)	2.3 C (4.1 F)	84 years	39 of 100 (Notable)
15 April 2026	Riverhead Rsch Farm, US	daily high min	15.0 C (59.0 F)	0.6 C (1.1 F)	80 years	33 of 100 (Routine)
15 April 2026	Riverhead Rsch Farm, US	daily high max (Tie)	27.8 C (82.0 F)	tie	88 years	8 of 100 (Routine)
1 April 2026	Riverhead Rsch Farm, US	daily high max (Tie)	21.7 C (71.1 F)	tie	80 years	8 of 100 (Routine)
1 April 2026	Riverhead Rsch Farm, US	daily high min (Tie)	12.8 C (55.0 F)	tie	9 years	2 of 100 (Routine)
11 March 2026	Riverhead Rsch Farm, US	daily high max	20.6 C (69.1 F)	1.2 C (2.2 F)	48 years	24 of 100 (Routine)

Climate Trend

78 complete years, 1939 to 2025

One stripe for each of 78 complete years at Riverhead Rsch Farm, 1939 to 2025. Blue stripes are years cooler than the station's own mean of 11.8 C (53.2 F); red stripes are warmer. The coolest year was 1940, at 9.8 C (49.7 F), and the warmest was 2023, at 13.4 C (56.0 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at Riverhead Rsch Farm as warming stripes, 1939 to 2025
Year	Annual mean temperature	Difference from the station mean
1939	11.3 C	-0.45 C
1940	9.8 C	-1.94 C
1941	11.6 C	-0.20 C
1942	11.2 C	-0.58 C
1943	11.0 C	-0.79 C
1944	11.4 C	-0.38 C
1945	11.3 C	-0.46 C
1946	11.7 C	-0.05 C
1947	11.2 C	-0.52 C
1948	11.1 C	-0.68 C
1949	12.9 C	+1.11 C
1951	12.0 C	+0.28 C
1952	12.2 C	+0.47 C
1953	12.8 C	+1.04 C
1954	11.8 C	+0.08 C
1955	11.8 C	+0.07 C
1956	11.3 C	-0.48 C
1958	10.4 C	-1.36 C
1959	11.7 C	-0.08 C
1961	11.0 C	-0.76 C
1962	9.9 C	-1.85 C
1963	10.6 C	-1.13 C
1964	10.9 C	-0.86 C
1965	10.3 C	-1.44 C
1966	10.5 C	-1.27 C
1967	10.0 C	-1.74 C
1969	10.8 C	-0.99 C
1970	11.2 C	-0.60 C
1971	11.3 C	-0.42 C
1972	11.1 C	-0.65 C
1973	12.4 C	+0.62 C
1974	11.6 C	-0.21 C
1975	12.1 C	+0.29 C
1976	11.0 C	-0.81 C
1977	11.6 C	-0.18 C
1978	10.6 C	-1.18 C
1979	11.5 C	-0.24 C
1980	11.2 C	-0.54 C
1981	11.1 C	-0.63 C
1982	11.2 C	-0.61 C
1983	12.1 C	+0.36 C
1984	11.6 C	-0.21 C
1985	11.4 C	-0.32 C
1986	11.7 C	-0.02 C
1987	12.1 C	+0.31 C
1988	11.8 C	-0.01 C
1989	11.6 C	-0.19 C
1990	13.1 C	+1.30 C
1991	13.2 C	+1.47 C
1992	11.3 C	-0.42 C
1993	11.6 C	-0.20 C
1994	11.6 C	-0.17 C
1995	11.7 C	-0.09 C
1996	11.3 C	-0.45 C
1997	12.1 C	+0.34 C
1999	13.2 C	+1.42 C
2000	11.9 C	+0.13 C
2001	12.6 C	+0.79 C
2002	12.8 C	+1.07 C
2003	11.3 C	-0.42 C
2004	11.8 C	+0.08 C
2006	12.9 C	+1.17 C
2007	12.1 C	+0.31 C
2008	12.2 C	+0.47 C
2009	11.7 C	-0.08 C
2010	12.9 C	+1.10 C
2011	12.8 C	+1.00 C
2015	12.3 C	+0.53 C
2016	13.0 C	+1.19 C
2017	12.6 C	+0.86 C
2018	12.6 C	+0.80 C
2019	12.4 C	+0.59 C
2020	13.2 C	+1.46 C
2021	13.0 C	+1.26 C
2022	12.9 C	+1.09 C
2023	13.4 C	+1.59 C
2024	13.3 C	+1.53 C
2025	12.5 C	+0.71 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1939 to 2025. In Fahrenheit: 0.4 F (0.3 to 0.5) per decade. The slope is a straight line fitted to 78 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Riverhead Rsch Farm
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.1 to 0.3) per decade	0.4 F (0.3 to 0.5) per decade	1939 to 2025	78	Rise
Mean daily maximum	0.2 C (0.1 to 0.2) per decade	0.3 F (0.2 to 0.4) per decade	1939 to 2025	78	Rise
Mean daily minimum	0.2 C (0.2 to 0.3) per decade	0.4 F (0.3 to 0.6) per decade	1939 to 2025	78	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

1938 to 2026

Yearly extremes at Riverhead Rsch Farm: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	1991	34.4 C (93.9 F)	89
Coldest night (TNn)	-22.2 C (-8.0 F)	1982	-14.4 C (6.1 F)	89
Wettest day (Rx1day)	174.5 mm (6.9 in)	1946	70.1 mm (2.8 in)	89
Wettest five days (Rx5day)	390.1 mm (15.4 in)	2005	106.4 mm (4.2 in)	89
Longest dry spell (CDD)	39 days	1949	18 days	89

Hottest day (TXx)

The hottest day of the year at Riverhead Rsch Farm, 1938 to 2026. The record is 37.8 C (100.0 F) in 1991, marked on the chart; the median year is 34.4 C (93.9 F).

Hottest day (TXx) at Riverhead Rsch Farm by year
Year	Hottest day (TXx)
1938	33.9 C (93.0 F)
1939	32.8 C (91.0 F)
1940	34.4 C (93.9 F)
1941	35.0 C (95.0 F)
1942	33.3 C (91.9 F)
1943	35.0 C (95.0 F)
1944	37.2 C (99.0 F)
1945	34.4 C (93.9 F)
1946	32.2 C (90.0 F)
1947	35.0 C (95.0 F)
1948	36.7 C (98.1 F)
1949	36.7 C (98.1 F)
1950	32.8 C (91.0 F)
1951	32.8 C (91.0 F)
1952	36.7 C (98.1 F)
1953	36.7 C (98.1 F)
1954	34.4 C (93.9 F)
1955	36.7 C (98.1 F)
1956	36.7 C (98.1 F)
1957	36.1 C (97.0 F)
1958	32.8 C (91.0 F)
1959	34.4 C (93.9 F)
1960	31.1 C (88.0 F)
1961	33.9 C (93.0 F)
1962	32.2 C (90.0 F)
1963	34.4 C (93.9 F)
1964	33.3 C (91.9 F)
1965	32.2 C (90.0 F)
1966	35.6 C (96.1 F)
1967	32.2 C (90.0 F)
1968	33.3 C (91.9 F)
1969	33.9 C (93.0 F)
1970	33.9 C (93.0 F)
1971	33.3 C (91.9 F)
1972	32.8 C (91.0 F)
1973	35.0 C (95.0 F)
1974	33.9 C (93.0 F)
1975	35.0 C (95.0 F)
1976	33.3 C (91.9 F)
1977	36.1 C (97.0 F)
1978	34.4 C (93.9 F)
1979	32.8 C (91.0 F)
1980	36.1 C (97.0 F)
1981	35.0 C (95.0 F)
1982	34.4 C (93.9 F)
1983	36.1 C (97.0 F)
1984	36.1 C (97.0 F)
1985	34.4 C (93.9 F)
1986	35.0 C (95.0 F)
1987	34.4 C (93.9 F)
1988	36.1 C (97.0 F)
1989	33.9 C (93.0 F)
1990	33.3 C (91.9 F)
1991	37.8 C (100.0 F)
1992	33.3 C (91.9 F)
1993	37.2 C (99.0 F)
1994	35.6 C (96.1 F)
1995	36.1 C (97.0 F)
1996	35.6 C (96.1 F)
1997	37.8 C (100.0 F)
1998	35.6 C (96.1 F)
1999	37.8 C (100.0 F)
2000	35.0 C (95.0 F)
2001	37.2 C (99.0 F)
2002	35.0 C (95.0 F)
2003	33.9 C (93.0 F)
2004	32.8 C (91.0 F)
2005	35.0 C (95.0 F)
2006	36.1 C (97.0 F)
2007	33.3 C (91.9 F)
2008	35.6 C (96.1 F)
2009	32.8 C (91.0 F)
2010	36.7 C (98.1 F)
2011	36.7 C (98.1 F)
2012	36.1 C (97.0 F)
2013	34.4 C (93.9 F)
2014	32.8 C (91.0 F)
2015	33.9 C (93.0 F)
2016	35.6 C (96.1 F)
2017	33.9 C (93.0 F)
2018	34.4 C (93.9 F)
2019	36.1 C (97.0 F)
2020	34.4 C (93.9 F)
2021	33.9 C (93.0 F)
2022	34.4 C (93.9 F)
2023	33.9 C (93.0 F)
2024	33.3 C (91.9 F)
2025	36.7 C (98.1 F)
2026	37.2 C (99.0 F)

Coldest night (TNn)

The coldest night of the year at Riverhead Rsch Farm, 1938 to 2026. The record is -22.2 C (-8.0 F) in 1982, marked on the chart; the median year is -14.4 C (6.1 F).

Coldest night (TNn) at Riverhead Rsch Farm by year
Year	Coldest night (TNn)
1938	-10.0 C (14.0 F)
1939	-14.4 C (6.1 F)
1940	-20.0 C (-4.0 F)
1941	-12.2 C (10.0 F)
1942	-18.9 C (-2.0 F)
1943	-21.1 C (-6.0 F)
1944	-15.6 C (3.9 F)
1945	-17.2 C (1.0 F)
1946	-14.4 C (6.1 F)
1947	-12.2 C (10.0 F)
1948	-17.8 C (0.0 F)
1949	-9.4 C (15.1 F)
1950	-15.6 C (3.9 F)
1951	-12.8 C (9.0 F)
1952	-13.9 C (7.0 F)
1953	-10.6 C (12.9 F)
1954	-16.1 C (3.0 F)
1955	-15.0 C (5.0 F)
1956	-11.1 C (12.0 F)
1957	-17.2 C (1.0 F)
1958	-16.7 C (1.9 F)
1959	-13.3 C (8.1 F)
1960	-14.4 C (6.1 F)
1961	-18.9 C (-2.0 F)
1962	-16.7 C (1.9 F)
1963	-18.9 C (-2.0 F)
1964	-12.8 C (9.0 F)
1965	-15.6 C (3.9 F)
1966	-14.4 C (6.1 F)
1967	-15.6 C (3.9 F)
1968	-18.3 C (-0.9 F)
1969	-13.9 C (7.0 F)
1970	-15.6 C (3.9 F)
1971	-14.4 C (6.1 F)
1972	-13.9 C (7.0 F)
1973	-13.3 C (8.1 F)
1974	-13.9 C (7.0 F)
1975	-12.2 C (10.0 F)
1976	-18.3 C (-0.9 F)
1977	-16.1 C (3.0 F)
1978	-12.2 C (10.0 F)
1979	-18.3 C (-0.9 F)
1980	-17.8 C (0.0 F)
1981	-17.8 C (0.0 F)
1982	-22.2 C (-8.0 F)
1983	-14.4 C (6.1 F)
1984	-21.1 C (-6.0 F)
1985	-17.8 C (0.0 F)
1986	-15.0 C (5.0 F)
1987	-14.4 C (6.1 F)
1988	-15.6 C (3.9 F)
1989	-12.8 C (9.0 F)
1990	-12.8 C (9.0 F)
1991	-13.9 C (7.0 F)
1992	-13.3 C (8.1 F)
1993	-15.6 C (3.9 F)
1994	-17.2 C (1.0 F)
1995	-15.0 C (5.0 F)
1996	-14.4 C (6.1 F)
1997	-14.4 C (6.1 F)
1998	-9.4 C (15.1 F)
1999	-11.7 C (10.9 F)
2000	-15.0 C (5.0 F)
2001	-10.0 C (14.0 F)
2002	-9.4 C (15.1 F)
2003	-13.9 C (7.0 F)
2004	-17.2 C (1.0 F)
2005	-14.4 C (6.1 F)
2006	-11.1 C (12.0 F)
2007	-13.3 C (8.1 F)
2008	-12.2 C (10.0 F)
2009	-17.8 C (0.0 F)
2010	-12.2 C (10.0 F)
2011	-13.9 C (7.0 F)
2012	-10.0 C (14.0 F)
2013	-8.3 C (17.1 F)
2014	-17.2 C (1.0 F)
2015	-16.7 C (1.9 F)
2016	-19.4 C (-2.9 F)
2017	-12.2 C (10.0 F)
2018	-15.6 C (3.9 F)
2019	-15.0 C (5.0 F)
2020	-10.0 C (14.0 F)
2021	-11.1 C (12.0 F)
2022	-13.9 C (7.0 F)
2023	-18.3 C (-0.9 F)
2024	-12.2 C (10.0 F)
2025	-13.9 C (7.0 F)
2026	-16.1 C (3.0 F)

Wettest day (Rx1day)

The wettest day of the year at Riverhead Rsch Farm, 1938 to 2026. The record is 174.5 mm (6.9 in) in 1946, marked on the chart; the median year is 70.1 mm (2.8 in).

Wettest day (Rx1day) at Riverhead Rsch Farm by year
Year	Wettest day (Rx1day)
1938	97.5 mm (3.8 in)
1939	67.8 mm (2.7 in)
1940	60.7 mm (2.4 in)
1941	34.8 mm (1.4 in)
1942	62.5 mm (2.5 in)
1943	41.9 mm (1.6 in)
1944	64.0 mm (2.5 in)
1945	41.1 mm (1.6 in)
1946	174.5 mm (6.9 in)
1947	88.9 mm (3.5 in)
1948	56.6 mm (2.2 in)
1949	50.5 mm (2.0 in)
1950	50.3 mm (2.0 in)
1951	86.4 mm (3.4 in)
1952	49.0 mm (1.9 in)
1953	70.1 mm (2.8 in)
1954	164.1 mm (6.5 in)
1955	81.3 mm (3.2 in)
1956	75.4 mm (3.0 in)
1957	70.1 mm (2.8 in)
1958	68.1 mm (2.7 in)
1959	124.2 mm (4.9 in)
1960	151.4 mm (6.0 in)
1961	75.9 mm (3.0 in)
1962	81.3 mm (3.2 in)
1963	61.0 mm (2.4 in)
1964	54.4 mm (2.1 in)
1965	142.5 mm (5.6 in)
1966	58.4 mm (2.3 in)
1967	65.8 mm (2.6 in)
1968	76.2 mm (3.0 in)
1969	86.4 mm (3.4 in)
1970	57.4 mm (2.3 in)
1971	53.3 mm (2.1 in)
1972	117.3 mm (4.6 in)
1973	66.0 mm (2.6 in)
1974	69.9 mm (2.8 in)
1975	84.1 mm (3.3 in)
1976	75.7 mm (3.0 in)
1977	62.0 mm (2.4 in)
1978	80.0 mm (3.1 in)
1979	91.4 mm (3.6 in)
1980	37.1 mm (1.5 in)
1981	52.6 mm (2.1 in)
1982	133.9 mm (5.3 in)
1983	112.5 mm (4.4 in)
1984	66.0 mm (2.6 in)
1985	68.6 mm (2.7 in)
1986	58.7 mm (2.3 in)
1987	69.1 mm (2.7 in)
1988	56.6 mm (2.2 in)
1989	161.0 mm (6.3 in)
1990	53.6 mm (2.1 in)
1991	140.2 mm (5.5 in)
1992	126.2 mm (5.0 in)
1993	67.6 mm (2.7 in)
1994	55.1 mm (2.2 in)
1995	61.5 mm (2.4 in)
1996	94.7 mm (3.7 in)
1997	52.1 mm (2.1 in)
1998	77.7 mm (3.1 in)
1999	90.2 mm (3.6 in)
2000	63.0 mm (2.5 in)
2001	108.0 mm (4.3 in)
2002	60.7 mm (2.4 in)
2003	76.5 mm (3.0 in)
2004	97.5 mm (3.8 in)
2005	141.7 mm (5.6 in)
2006	80.8 mm (3.2 in)
2007	72.4 mm (2.9 in)
2008	91.9 mm (3.6 in)
2009	55.1 mm (2.2 in)
2010	135.9 mm (5.4 in)
2011	106.7 mm (4.2 in)
2012	54.9 mm (2.2 in)
2013	98.6 mm (3.9 in)
2014	104.1 mm (4.1 in)
2015	43.7 mm (1.7 in)
2016	43.4 mm (1.7 in)
2017	83.3 mm (3.3 in)
2018	51.8 mm (2.0 in)
2019	58.9 mm (2.3 in)
2020	54.4 mm (2.1 in)
2021	85.1 mm (3.4 in)
2022	66.3 mm (2.6 in)
2023	89.7 mm (3.5 in)
2024	128.0 mm (5.0 in)
2025	57.2 mm (2.3 in)
2026	86.4 mm (3.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Riverhead Rsch Farm, 1938 to 2026. The record is 390.1 mm (15.4 in) in 2005, marked on the chart; the median year is 106.4 mm (4.2 in).

Wettest five days (Rx5day) at Riverhead Rsch Farm by year
Year	Wettest five days (Rx5day)
1938	240.8 mm (9.5 in)
1939	98.4 mm (3.9 in)
1940	100.5 mm (4.0 in)
1941	58.4 mm (2.3 in)
1942	111.6 mm (4.4 in)
1943	69.1 mm (2.7 in)
1944	134.3 mm (5.3 in)
1945	63.8 mm (2.5 in)
1946	178.8 mm (7.0 in)
1947	129.9 mm (5.1 in)
1948	65.5 mm (2.6 in)
1949	74.5 mm (2.9 in)
1950	63.0 mm (2.5 in)
1951	123.8 mm (4.9 in)
1952	82.2 mm (3.2 in)
1953	93.5 mm (3.7 in)
1954	173.2 mm (6.8 in)
1955	123.2 mm (4.9 in)
1956	76.2 mm (3.0 in)
1957	137.6 mm (5.4 in)
1958	124.7 mm (4.9 in)
1959	164.6 mm (6.5 in)
1960	165.7 mm (6.5 in)
1961	96.7 mm (3.8 in)
1962	103.7 mm (4.1 in)
1963	84.4 mm (3.3 in)
1964	76.7 mm (3.0 in)
1965	149.6 mm (5.9 in)
1966	68.6 mm (2.7 in)
1967	90.9 mm (3.6 in)
1968	97.3 mm (3.8 in)
1969	140.0 mm (5.5 in)
1970	108.4 mm (4.3 in)
1971	74.7 mm (2.9 in)
1972	160.2 mm (6.3 in)
1973	88.3 mm (3.5 in)
1974	70.4 mm (2.8 in)
1975	129.5 mm (5.1 in)
1976	124.2 mm (4.9 in)
1977	80.3 mm (3.2 in)
1978	92.2 mm (3.6 in)
1979	165.6 mm (6.5 in)
1980	71.9 mm (2.8 in)
1981	81.0 mm (3.2 in)
1982	241.3 mm (9.5 in)
1983	116.8 mm (4.6 in)
1984	177.8 mm (7.0 in)
1985	106.4 mm (4.2 in)
1986	93.4 mm (3.7 in)
1987	129.1 mm (5.1 in)
1988	90.2 mm (3.6 in)
1989	194.6 mm (7.7 in)
1990	74.2 mm (2.9 in)
1991	163.6 mm (6.4 in)
1992	130.8 mm (5.1 in)
1993	100.1 mm (3.9 in)
1994	87.4 mm (3.4 in)
1995	79.0 mm (3.1 in)
1996	154.6 mm (6.1 in)
1997	66.5 mm (2.6 in)
1998	109.5 mm (4.3 in)
1999	117.2 mm (4.6 in)
2000	91.2 mm (3.6 in)
2001	137.7 mm (5.4 in)
2002	95.7 mm (3.8 in)
2003	108.8 mm (4.3 in)
2004	114.1 mm (4.5 in)
2005	390.1 mm (15.4 in)
2006	110.2 mm (4.3 in)
2007	102.3 mm (4.0 in)
2008	116.5 mm (4.6 in)
2009	91.2 mm (3.6 in)
2010	192.8 mm (7.6 in)
2011	150.4 mm (5.9 in)
2012	73.4 mm (2.9 in)
2013	182.4 mm (7.2 in)
2014	130.3 mm (5.1 in)
2015	97.0 mm (3.8 in)
2016	59.4 mm (2.3 in)
2017	123.8 mm (4.9 in)
2018	87.1 mm (3.4 in)
2019	92.5 mm (3.6 in)
2020	59.6 mm (2.3 in)
2021	139.2 mm (5.5 in)
2022	79.2 mm (3.1 in)
2023	107.7 mm (4.2 in)
2024	130.5 mm (5.1 in)
2025	102.6 mm (4.0 in)
2026	108.7 mm (4.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Riverhead Rsch Farm, 1938 to 2026. The record is 39 days in 1949, marked on the chart; the median year is 18 days.

Longest dry spell (CDD) at Riverhead Rsch Farm by year
Year	Longest dry spell (CDD)
1938	13 days
1939	25 days
1940	17 days
1941	29 days
1942	21 days
1943	19 days
1944	21 days
1945	14 days
1946	20 days
1947	33 days
1948	28 days
1949	39 days
1950	16 days
1951	17 days
1952	19 days
1953	20 days
1954	14 days
1955	18 days
1956	12 days
1957	16 days
1958	21 days
1959	28 days
1960	19 days
1961	16 days
1962	16 days
1963	28 days
1964	18 days
1965	21 days
1966	15 days
1967	23 days
1968	31 days
1969	17 days
1970	17 days
1971	17 days
1972	18 days
1973	20 days
1974	15 days
1975	24 days
1976	28 days
1977	26 days
1978	19 days
1979	14 days
1980	36 days
1981	15 days
1982	17 days
1983	20 days
1984	20 days
1985	20 days
1986	19 days
1987	20 days
1988	17 days
1989	17 days
1990	11 days
1991	14 days
1992	20 days
1993	23 days
1994	21 days
1995	25 days
1996	16 days
1997	16 days
1998	14 days
1999	20 days
2000	21 days
2001	29 days
2002	13 days
2003	12 days
2004	25 days
2005	15 days
2006	19 days
2007	24 days
2008	16 days
2009	9 days
2010	16 days
2011	12 days
2012	13 days
2013	17 days
2014	19 days
2015	22 days
2016	14 days
2017	16 days
2018	18 days
2019	15 days
2020	15 days
2021	16 days
2022	13 days
2023	16 days
2024	34 days
2025	16 days
2026	17 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.

Frost Dates and Growing Season

78 years with a frost

Across 78 years with a frost, the median last spring frost at Riverhead Rsch Farm falls on 11 April and the median first autumn frost on 6 November, which leaves a median of 206 days between them.

In 1991 to 2025 the median growing season was 216 days. That is 17 days more than in 1939 to 1972.

Fitted over all years, the growing season changes by +1.6 days per decade at this station.

Frost dates and growing season at Riverhead Rsch Farm
Measure	Median, all years	Earliest period (1939 to 1972)	Recent period (1991 to 2025)	Recent against earliest	Fitted trend
Last spring frost	11 April	14 April	9 April	5 days earlier	-0.7 days per decade
First autumn frost	6 November	6 November	7 November	1 day later	+0.9 days per decade
Growing days	206 days	199 days	216 days	17 days more	+1.6 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

84 years, 1939 to 2025

A day with at least 71.8 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 204.3 mm (8.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Riverhead Rsch Farm: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	71.8 mm (2.8 in)
5 years	98.9 mm (3.9 in)
10 years	119.8 mm (4.7 in)
25 years	150.1 mm (5.9 in)
50 years	175.8 mm (6.9 in)
100 years	204.3 mm (8.0 in)	Longer than the 84 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, 84 years of values from 1939 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: 174.5 mm (6.9 in) in 1946; 164.1 mm (6.5 in) in 1954; 161.0 mm (6.3 in) in 1989.

Station Changes

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

Climate Twins

2008 to 2025 against 1961 to 1990

Over 2008 to 2025, Riverhead Rsch Farm had a mean temperature of 12.7 C (54.9 F) and 1,210.7 mm (47.7 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Ny Ave V Brooklyn (United States, 114 km away), Ny City Cntrl Park (United States, 107 km away) and Georgetown 5 SW (United States, 349 km away).

Climate twins of Riverhead Rsch Farm: stations whose 1961 to 1990 climate is closest to its 2008 to 2025 climate
Twin station	Country	Distance away	Mean temperature, 1961-1990	Rain a year, 1961-1990	Climate difference
Ny Ave V Brooklyn	United States	114 km (71 mi)	12.5 C (54.6 F)	1,147.5 mm (45.2 in)	0.66
Ny City Cntrl Park	United States	107 km (66 mi)	12.6 C (54.7 F)	1,215.3 mm (47.8 in)	0.71
Georgetown 5 SW	United States	349 km (217 mi)	12.7 C (54.9 F)	1,104.1 mm (43.5 in)	0.74

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

Data for Riverhead Rsch Farm standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Riverhead Rsch Farm 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 2026-10-14. Last revised 14 October 2026 (2026-10-14).