Unity Weather Records (USC00358780)

Record envelope, standing records and threshold days for Unity (USC00358780), Oregon, United States, with 100 years of record.

Key Facts for Unity

Unity (USC00358780) is a weather station in Oregon, United States at 44.44 latitude and -118.19 longitude, 1,229 m (4,031 ft) above sea level.
The station reports from 1908 to 2007, 100 years of record.
1,464 records set at Unity still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Unity set a daily record snowfall of 8.9 cm (3.5 in) on 29 November 2007.

About the Station

Location: Oregon, United States, 44.44 latitude, -118.19 longitude.
Elevation: 1,229 m (4,031 ft).
Period of record: 1908 to 2007, 100 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 Unity. 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 Unity, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	13.9 C (57.0 F)	-35.6 C (-32.1 F)	n/a	n/a
Feb	17.8 C (64.0 F)	-33.3 C (-27.9 F)	n/a	n/a
Mar	28.9 C (84.0 F)	-26.1 C (-15.0 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-14.4 C (6.1 F)	n/a	n/a
May	36.1 C (97.0 F)	-11.7 C (10.9 F)	n/a	n/a
Jun	40.6 C (105.1 F)	-6.7 C (19.9 F)	n/a	n/a
Jul	41.7 C (107.1 F)	-4.4 C (24.1 F)	n/a	n/a
Aug	39.4 C (102.9 F)	-5.6 C (21.9 F)	n/a	n/a
Sep	38.3 C (100.9 F)	-11.7 C (10.9 F)	n/a	n/a
Oct	31.1 C (88.0 F)	-20.6 C (-5.1 F)	n/a	n/a
Nov	20.6 C (69.1 F)	-29.4 C (-20.9 F)	n/a	n/a
Dec	14.4 C (57.9 F)	-36.1 C (-33.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Unity still stand. 1939 holds the most, with 40.

Standing records at Unity by the year they were set
Year set	Standing records
1936	17
1937	32
1938	23
1939	40
1940	34
1941	18
1942	25
1943	27
1944	10
1945	25
1946	17
1947	17
1948	20
1949	33
1950	27
1951	19
1952	21
1953	19
1954	18
1955	34
1956	25
1957	19
1958	13
1959	13
1960	21
1961	25
1962	23
1963	29
1964	16
1965	12
1966	22
1967	12
1968	20
1969	21
1970	20
1971	24
1972	33
1973	9
1974	30
1975	21
1976	15
1977	18
1978	17
1979	24
1980	16
1981	12
1982	21
1983	17
1984	20
1985	34
1986	19
1987	18
1988	14
1989	16
1990	23
1991	13
1992	27
1993	15
1994	15
1995	12
1996	25
1997	12
1998	12
1999	17
2000	8
2001	15
2002	21
2003	35
2004	11
2005	11
2006	24
2007	23

All-Time Record Progression

5 new records

5 all-time records were set at Unity between 23 January 1982 and 11 July 2002. Each dot is a new record.

When Unity set new all-time records
Date	Kind	Detail
1982-01-23	Record daily snowfall	Record daily snowfall 45.7 cm (18.0 in)
1983-12-23	Record low maximum temperature	Record low maximum temperature -21.7 C (-7.1 F)
1984-08-31	Record daily precipitation	Record daily precipitation 61.7 mm (2.4 in)
1990-12-21	Record low minimum temperature	Record low minimum temperature -36.1 C (-33.0 F)
2002-07-11	Record high maximum temperature	Record high maximum temperature 41.7 C (107.1 F)

Wettest Day of Each Month

Aug: 61.7 mm (2.4 in)

The wettest day on record for each calendar month at Unity. The most was 61.7 mm (2.4 in) on 31 August 1984.

Record daily precipitation for each month at Unity
Month	Record daily precipitation (mm)	Date
Jan	40.6 mm (1.6 in)	3 January 1983
Feb	22.9 mm (0.9 in)	15 February 1949
Mar	23.1 mm (0.9 in)	4 March 1983
Apr	25.7 mm (1.0 in)	21 April 1983
May	37.6 mm (1.5 in)	6 May 2005
Jun	34.8 mm (1.4 in)	14 June 1980
Jul	27.2 mm (1.1 in)	1 July 1982
Aug	61.7 mm (2.4 in)	31 August 1984
Sep	46.2 mm (1.8 in)	2 September 1909
Oct	20.6 mm (0.8 in)	1 October 1957
Nov	24.1 mm (0.9 in)	28 November 1995
Dec	21.8 mm (0.9 in)	15 December 1977

Period of Record Coverage

1936 to 2007

72 years of record at Unity, 1936 to 2007. 46 years have data for under 90 percent of days and are left out of rankings: 1936, 1947, 1948, 1949, 1950, 1952, 1955, 1958 and others.

Days with data per year at Unity
Year	Days with data	Share of year	Complete
1936	183	50%	No
1937	358	98%	Yes
1938	357	98%	Yes
1939	330	90%	Yes
1940	363	99%	Yes
1941	343	94%	Yes
1942	360	99%	Yes
1943	361	99%	Yes
1944	331	90%	Yes
1945	364	100%	Yes
1946	363	99%	Yes
1947	222	61%	No
1948	307	84%	No
1949	277	76%	No
1950	304	83%	No
1951	335	92%	Yes
1952	309	84%	No
1953	335	92%	Yes
1954	342	94%	Yes
1955	309	85%	No
1956	331	90%	Yes
1957	334	92%	Yes
1958	298	82%	No
1959	334	92%	Yes
1960	351	96%	Yes
1961	347	95%	Yes
1962	343	94%	Yes
1963	336	92%	Yes
1964	309	84%	No
1965	318	87%	No
1966	316	87%	No
1967	275	75%	No
1968	295	81%	No
1969	327	90%	No
1970	354	97%	Yes
1971	286	78%	No
1972	337	92%	Yes
1973	285	78%	No
1974	319	87%	No
1975	322	88%	No
1976	338	92%	Yes
1977	345	95%	Yes
1978	346	95%	Yes
1979	338	93%	Yes
1980	322	88%	No
1981	311	85%	No
1982	253	69%	No
1983	290	79%	No
1984	261	71%	No
1985	261	72%	No
1986	261	72%	No
1987	169	46%	No
1988	235	64%	No
1989	226	62%	No
1990	233	64%	No
1991	238	65%	No
1992	247	67%	No
1993	241	66%	No
1994	242	66%	No
1995	233	64%	No
1996	241	66%	No
1997	243	67%	No
1998	238	65%	No
1999	243	67%	No
2000	237	65%	No
2001	240	66%	No
2002	239	65%	No
2003	235	64%	No
2004	229	63%	No
2005	213	58%	No
2006	174	48%	No
2007	181	50%	No

Latest Records

Latest records at Unity
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 November 2007	Unity, US	daily snowfall	8.9 cm (3.5 in)	3.8 cm (1.5 in)	58 years	39 of 100 (Notable)
6 November 2007	Unity, US	daily high max	17.8 C (64.0 F)	0.6 C (1.1 F)	5 years	9 of 100 (Routine)
19 October 2007	Unity, US	daily rain	11.9 mm (0.5 in)	5.8 mm (0.23 in)	28 years	20 of 100 (Routine)
31 August 2007	Unity, US	daily high max	36.1 C (97.0 F)	0.5 C (0.9 F)	20 years	14 of 100 (Routine)
30 August 2007	Unity, US	daily high max	36.1 C (97.0 F)	1.1 C (2.0 F)	52 years	24 of 100 (Routine)
16 August 2007	Unity, US	daily high max (Tie)	36.7 C (98.1 F)	tie	12 years	2 of 100 (Routine)
17 July 2007	Unity, US	daily high min	12.8 C (55.0 F)	1.1 C (2.0 F)	48 years	24 of 100 (Routine)
16 July 2007	Unity, US	daily high max	37.8 C (100.0 F)	1.1 C (2.0 F)	4 years	10 of 100 (Routine)
13 July 2007	Unity, US	daily high max	37.8 C (100.0 F)	0.6 C (1.1 F)	8 years	10 of 100 (Routine)
10 July 2007	Unity, US	daily high max	39.4 C (102.9 F)	0.5 C (0.9 F)	4 years	9 of 100 (Routine)
9 July 2007	Unity, US	daily high max	39.4 C (102.9 F)	3.3 C (5.9 F)	21 years	20 of 100 (Routine)
6 July 2007	Unity, US	daily high max	41.1 C (106.0 F)	3.3 C (5.9 F)	5 years	15 of 100 (Routine)
5 July 2007	Unity, US	daily high max	41.1 C (106.0 F)	3.3 C (5.9 F)	5 years	15 of 100 (Routine)
5 June 2007	Unity, US	daily high max	33.9 C (93.0 F)	1.7 C (3.1 F)	37 years	21 of 100 (Routine)
4 June 2007	Unity, US	daily high max	33.9 C (93.0 F)	1.7 C (3.1 F)	37 years	21 of 100 (Routine)
1 June 2007	Unity, US	daily high max	32.8 C (91.0 F)	0.6 C (1.1 F)	14 years	12 of 100 (Routine)
20 April 2007	Unity, US	daily low min	-12.2 C (10.0 F)	3.9 C (7.0 F)	20 years	23 of 100 (Routine)
16 April 2007	Unity, US	daily low min	-10.6 C (12.9 F)	1.2 C (2.2 F)	5 years	11 of 100 (Routine)
13 April 2007	Unity, US	daily low min	-10.6 C (12.9 F)	1.2 C (2.2 F)	40 years	22 of 100 (Routine)
11 April 2007	Unity, US	daily low min	-11.7 C (10.9 F)	1.1 C (2.0 F)	22 years	15 of 100 (Routine)

Climate Trend

21 complete years, 1937 to 1981

One stripe for each of 21 complete years at Unity, 1937 to 1981. Blue stripes are years cooler than the station's own mean of 6.5 C (43.6 F); red stripes are warmer. The coolest year was 1942, at 5.5 C (41.9 F), and the warmest was 1981, at 7.4 C (45.4 F). The strongest colour marks a difference of 1.0 C (1.8 F).

Annual mean temperature at Unity as warming stripes, 1937 to 1981
Year	Annual mean temperature	Difference from the station mean
1937	5.8 C	-0.63 C
1938	6.5 C	+0.00 C
1940	7.3 C	+0.85 C
1942	5.5 C	-0.98 C
1943	6.0 C	-0.43 C
1945	6.0 C	-0.44 C
1946	5.7 C	-0.77 C
1953	7.1 C	+0.65 C
1954	6.7 C	+0.26 C
1957	6.1 C	-0.32 C
1959	6.5 C	+0.07 C
1961	7.1 C	+0.59 C
1962	5.8 C	-0.64 C
1963	7.2 C	+0.75 C
1965	6.3 C	-0.14 C
1969	6.3 C	-0.18 C
1970	6.6 C	+0.18 C
1976	6.2 C	-0.29 C
1977	7.0 C	+0.51 C
1978	6.4 C	-0.09 C
1981	7.4 C	+0.97 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

1908 to 2007

Yearly extremes at Unity: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.7 C (107.1 F)	2002	36.7 C (98.1 F)	72
Coldest night (TNn)	-36.1 C (-33.0 F)	1990	-25.6 C (-14.1 F)	72
Wettest day (Rx1day)	61.7 mm (2.4 in)	1984	18.8 mm (0.7 in)	76
Wettest five days (Rx5day)	78.7 mm (3.1 in)	1984	26.7 mm (1.1 in)	76
Longest dry spell (CDD)	90 days	1936	38 days	76

Hottest day (TXx)

The hottest day of the year at Unity, 1908 to 2007. The record is 41.7 C (107.1 F) in 2002, marked on the chart; the median year is 36.7 C (98.1 F).

Hottest day (TXx) at Unity by year
Year	Hottest day (TXx)
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1936	39.4 C (102.9 F)
1937	40.6 C (105.1 F)
1938	40.0 C (104.0 F)
1939	37.8 C (100.0 F)
1940	39.4 C (102.9 F)
1941	33.9 C (93.0 F)
1942	37.2 C (99.0 F)
1943	36.1 C (97.0 F)
1944	35.0 C (95.0 F)
1945	35.6 C (96.1 F)
1946	37.2 C (99.0 F)
1947	33.9 C (93.0 F)
1948	32.8 C (91.0 F)
1949	36.7 C (98.1 F)
1950	36.1 C (97.0 F)
1951	37.8 C (100.0 F)
1952	35.6 C (96.1 F)
1953	36.7 C (98.1 F)
1954	35.0 C (95.0 F)
1955	35.0 C (95.0 F)
1956	34.4 C (93.9 F)
1957	32.8 C (91.0 F)
1958	34.4 C (93.9 F)
1959	37.2 C (99.0 F)
1960	38.3 C (100.9 F)
1961	39.4 C (102.9 F)
1962	35.6 C (96.1 F)
1963	35.6 C (96.1 F)
1964	35.0 C (95.0 F)
1965	33.3 C (91.9 F)
1966	35.6 C (96.1 F)
1967	36.7 C (98.1 F)
1968	37.8 C (100.0 F)
1969	37.2 C (99.0 F)
1970	35.6 C (96.1 F)
1971	35.6 C (96.1 F)
1972	37.8 C (100.0 F)
1973	35.6 C (96.1 F)
1974	35.6 C (96.1 F)
1975	37.2 C (99.0 F)
1976	35.0 C (95.0 F)
1977	36.7 C (98.1 F)
1978	36.1 C (97.0 F)
1979	36.1 C (97.0 F)
1980	37.2 C (99.0 F)
1981	37.2 C (99.0 F)
1982	33.3 C (91.9 F)
1983	37.8 C (100.0 F)
1984	36.7 C (98.1 F)
1985	36.7 C (98.1 F)
1986	37.8 C (100.0 F)
1987	37.8 C (100.0 F)
1988	36.7 C (98.1 F)
1989	36.1 C (97.0 F)
1990	38.9 C (102.0 F)
1991	35.6 C (96.1 F)
1992	37.8 C (100.0 F)
1993	33.9 C (93.0 F)
1994	38.9 C (102.0 F)
1995	34.4 C (93.9 F)
1996	37.8 C (100.0 F)
1997	34.4 C (93.9 F)
1998	38.3 C (100.9 F)
1999	38.9 C (102.0 F)
2000	38.9 C (102.0 F)
2001	37.8 C (100.0 F)
2002	41.7 C (107.1 F)
2003	40.6 C (105.1 F)
2004	38.9 C (102.0 F)
2005	38.9 C (102.0 F)
2006	39.4 C (102.9 F)
2007	41.1 C (106.0 F)

Coldest night (TNn)

The coldest night of the year at Unity, 1908 to 2007. The record is -36.1 C (-33.0 F) in 1990, marked on the chart; the median year is -25.6 C (-14.1 F).

Coldest night (TNn) at Unity by year
Year	Coldest night (TNn)
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1936	-16.7 C (1.9 F)
1937	-35.6 C (-32.1 F)
1938	-21.1 C (-6.0 F)
1939	-23.3 C (-9.9 F)
1940	-20.0 C (-4.0 F)
1941	-18.9 C (-2.0 F)
1942	-25.0 C (-13.0 F)
1943	-30.6 C (-23.1 F)
1944	-22.2 C (-8.0 F)
1945	-23.3 C (-9.9 F)
1946	-23.3 C (-9.9 F)
1947	-30.0 C (-22.0 F)
1948	-30.0 C (-22.0 F)
1949	-32.2 C (-26.0 F)
1950	-33.3 C (-27.9 F)
1951	-31.7 C (-25.1 F)
1952	-25.6 C (-14.1 F)
1953	-19.4 C (-2.9 F)
1954	-23.3 C (-9.9 F)
1955	-27.2 C (-17.0 F)
1956	-31.7 C (-25.1 F)
1957	-31.7 C (-25.1 F)
1958	-18.9 C (-2.0 F)
1959	-24.4 C (-11.9 F)
1960	-27.8 C (-18.0 F)
1961	-27.2 C (-17.0 F)
1962	-35.0 C (-31.0 F)
1963	-27.8 C (-18.0 F)
1964	-33.9 C (-29.0 F)
1965	-24.4 C (-11.9 F)
1966	-17.8 C (0.0 F)
1967	-23.3 C (-9.9 F)
1968	-21.1 C (-6.0 F)
1969	-22.2 C (-8.0 F)
1970	-21.1 C (-6.0 F)
1971	-22.8 C (-9.0 F)
1972	-31.1 C (-24.0 F)
1973	-22.8 C (-9.0 F)
1974	-29.4 C (-20.9 F)
1975	-20.6 C (-5.1 F)
1976	-26.7 C (-16.1 F)
1977	-25.6 C (-14.1 F)
1978	-30.6 C (-23.1 F)
1979	-31.7 C (-25.1 F)
1980	-28.9 C (-20.0 F)
1981	-18.9 C (-2.0 F)
1982	-26.7 C (-16.1 F)
1983	-35.6 C (-32.1 F)
1984	-27.8 C (-18.0 F)
1985	-29.4 C (-20.9 F)
1986	-19.4 C (-2.9 F)
1987	-20.0 C (-4.0 F)
1988	-26.1 C (-15.0 F)
1989	-33.3 C (-27.9 F)
1990	-36.1 C (-33.0 F)
1991	-30.0 C (-22.0 F)
1992	-29.4 C (-20.9 F)
1993	-26.1 C (-15.0 F)
1994	-21.7 C (-7.1 F)
1995	-24.4 C (-11.9 F)
1996	-29.4 C (-20.9 F)
1997	-18.9 C (-2.0 F)
1998	-25.6 C (-14.1 F)
1999	-21.1 C (-6.0 F)
2000	-18.9 C (-2.0 F)
2001	-21.7 C (-7.1 F)
2002	-23.9 C (-11.0 F)
2003	-26.1 C (-15.0 F)
2004	-28.9 C (-20.0 F)
2005	-18.9 C (-2.0 F)
2006	-24.4 C (-11.9 F)
2007	-23.9 C (-11.0 F)

Wettest day (Rx1day)

The wettest day of the year at Unity, 1908 to 2007. The record is 61.7 mm (2.4 in) in 1984, marked on the chart; the median year is 18.8 mm (0.7 in).

Wettest day (Rx1day) at Unity by year
Year	Wettest day (Rx1day)
1908	26.7 mm (1.1 in)
1909	46.2 mm (1.8 in)
1910	21.3 mm (0.8 in)
1911	24.4 mm (1.0 in)
1936	10.2 mm (0.4 in)
1937	18.3 mm (0.7 in)
1938	13.2 mm (0.5 in)
1939	11.9 mm (0.5 in)
1940	20.3 mm (0.8 in)
1941	24.4 mm (1.0 in)
1942	16.5 mm (0.6 in)
1943	16.5 mm (0.6 in)
1944	21.6 mm (0.9 in)
1945	21.1 mm (0.8 in)
1946	26.9 mm (1.1 in)
1947	19.3 mm (0.8 in)
1948	34.3 mm (1.4 in)
1949	22.9 mm (0.9 in)
1950	20.3 mm (0.8 in)
1951	13.5 mm (0.5 in)
1952	18.8 mm (0.7 in)
1953	27.4 mm (1.1 in)
1954	9.9 mm (0.39 in)
1955	13.7 mm (0.5 in)
1956	17.3 mm (0.7 in)
1957	20.6 mm (0.8 in)
1958	14.7 mm (0.6 in)
1959	15.2 mm (0.6 in)
1960	21.3 mm (0.8 in)
1961	15.0 mm (0.6 in)
1962	17.3 mm (0.7 in)
1963	18.5 mm (0.7 in)
1964	17.5 mm (0.7 in)
1965	34.8 mm (1.4 in)
1966	13.7 mm (0.5 in)
1967	10.9 mm (0.4 in)
1968	20.8 mm (0.8 in)
1969	27.7 mm (1.1 in)
1970	23.1 mm (0.9 in)
1971	10.9 mm (0.4 in)
1972	21.6 mm (0.9 in)
1973	11.4 mm (0.4 in)
1974	16.0 mm (0.6 in)
1975	15.7 mm (0.6 in)
1976	15.5 mm (0.6 in)
1977	21.8 mm (0.9 in)
1978	17.5 mm (0.7 in)
1979	23.1 mm (0.9 in)
1980	34.8 mm (1.4 in)
1981	18.8 mm (0.7 in)
1982	27.2 mm (1.1 in)
1983	40.6 mm (1.6 in)
1984	61.7 mm (2.4 in)
1985	14.7 mm (0.6 in)
1986	15.0 mm (0.6 in)
1987	15.0 mm (0.6 in)
1988	12.7 mm (0.5 in)
1989	19.8 mm (0.8 in)
1990	16.0 mm (0.6 in)
1991	19.3 mm (0.8 in)
1992	16.8 mm (0.7 in)
1993	25.4 mm (1.0 in)
1994	9.9 mm (0.39 in)
1995	24.1 mm (0.9 in)
1996	18.8 mm (0.7 in)
1997	19.6 mm (0.8 in)
1998	26.9 mm (1.1 in)
1999	15.7 mm (0.6 in)
2000	16.5 mm (0.6 in)
2001	13.2 mm (0.5 in)
2002	13.5 mm (0.5 in)
2003	24.1 mm (0.9 in)
2004	20.8 mm (0.8 in)
2005	37.6 mm (1.5 in)
2006	27.2 mm (1.1 in)
2007	11.9 mm (0.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Unity, 1908 to 2007. The record is 78.7 mm (3.1 in) in 1984, marked on the chart; the median year is 26.7 mm (1.1 in).

Wettest five days (Rx5day) at Unity by year
Year	Wettest five days (Rx5day)
1908	40.6 mm (1.6 in)
1909	63.8 mm (2.5 in)
1910	33.5 mm (1.3 in)
1911	25.9 mm (1.0 in)
1936	18.6 mm (0.7 in)
1937	29.2 mm (1.1 in)
1938	25.0 mm (1.0 in)
1939	19.6 mm (0.8 in)
1940	41.0 mm (1.6 in)
1941	37.2 mm (1.5 in)
1942	24.4 mm (1.0 in)
1943	28.9 mm (1.1 in)
1944	33.5 mm (1.3 in)
1945	25.9 mm (1.0 in)
1946	28.4 mm (1.1 in)
1947	39.4 mm (1.6 in)
1948	47.8 mm (1.9 in)
1949	26.7 mm (1.1 in)
1950	26.7 mm (1.1 in)
1951	22.8 mm (0.9 in)
1952	22.3 mm (0.9 in)
1953	51.3 mm (2.0 in)
1954	23.9 mm (0.9 in)
1955	28.8 mm (1.1 in)
1956	25.3 mm (1.0 in)
1957	26.2 mm (1.0 in)
1958	45.0 mm (1.8 in)
1959	20.6 mm (0.8 in)
1960	32.0 mm (1.3 in)
1961	27.4 mm (1.1 in)
1962	56.7 mm (2.2 in)
1963	23.2 mm (0.9 in)
1964	58.5 mm (2.3 in)
1965	65.4 mm (2.6 in)
1966	17.5 mm (0.7 in)
1967	18.2 mm (0.7 in)
1968	34.5 mm (1.4 in)
1969	33.1 mm (1.3 in)
1970	30.5 mm (1.2 in)
1971	26.7 mm (1.1 in)
1972	33.2 mm (1.3 in)
1973	22.3 mm (0.9 in)
1974	28.2 mm (1.1 in)
1975	30.5 mm (1.2 in)
1976	32.2 mm (1.3 in)
1977	24.6 mm (1.0 in)
1978	31.0 mm (1.2 in)
1979	36.8 mm (1.4 in)
1980	54.4 mm (2.1 in)
1981	39.6 mm (1.6 in)
1982	40.1 mm (1.6 in)
1983	50.8 mm (2.0 in)
1984	78.7 mm (3.1 in)
1985	19.5 mm (0.8 in)
1986	23.9 mm (0.9 in)
1987	16.3 mm (0.6 in)
1988	10.7 mm (0.4 in)
1989	12.2 mm (0.5 in)
1990	15.5 mm (0.6 in)
1991	20.8 mm (0.8 in)
1992	11.4 mm (0.4 in)
1993	12.0 mm (0.5 in)
1994	9.9 mm (0.39 in)
1995	28.0 mm (1.1 in)
1996	19.3 mm (0.8 in)
1997	31.5 mm (1.2 in)
1998	34.5 mm (1.4 in)
1999	21.0 mm (0.8 in)
2000	25.6 mm (1.0 in)
2001	21.6 mm (0.9 in)
2002	16.8 mm (0.7 in)
2003	26.1 mm (1.0 in)
2004	31.5 mm (1.2 in)
2005	6.6 mm (0.26 in)
2006	24.9 mm (1.0 in)
2007	15.0 mm (0.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Unity, 1908 to 2007. The record is 90 days in 1936, marked on the chart; the median year is 38 days.

Longest dry spell (CDD) at Unity by year
Year	Longest dry spell (CDD)
1908	39 days
1909	36 days
1910	54 days
1911	31 days
1936	90 days
1937	47 days
1938	20 days
1939	68 days
1940	38 days
1941	29 days
1942	67 days
1943	40 days
1944	52 days
1945	25 days
1946	43 days
1947	23 days
1948	36 days
1949	62 days
1950	43 days
1951	38 days
1952	64 days
1953	47 days
1954	45 days
1955	53 days
1956	30 days
1957	68 days
1958	24 days
1959	31 days
1960	41 days
1961	40 days
1962	43 days
1963	38 days
1964	31 days
1965	30 days
1966	70 days
1967	33 days
1968	41 days
1969	74 days
1970	29 days
1971	30 days
1972	49 days
1973	38 days
1974	63 days
1975	22 days
1976	40 days
1977	30 days
1978	69 days
1979	39 days
1980	39 days
1981	41 days
1982	30 days
1983	24 days
1984	32 days
1985	58 days
1986	38 days
1987	80 days
1988	38 days
1989	32 days
1990	30 days
1991	27 days
1992	30 days
1993	35 days
1994	56 days
1995	39 days
1996	46 days
1997	35 days
1998	36 days
1999	57 days
2000	42 days
2001	28 days
2002	35 days
2003	30 days
2004	25 days
2005	31 days
2006	36 days
2007	32 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

21 years with a frost

Across 21 years with a frost, the median last spring frost at Unity falls on 24 June and the median first autumn frost on 26 July, which leaves a median of 37 days between them.

Frost dates and growing season at Unity
Measure	Median, all years	Earliest period	Recent period (1937 to 1981)	Recent against earliest	Fitted trend
Last spring frost	24 June	n/a	24 June	n/a	n/a
First autumn frost	26 July	n/a	26 July	n/a	n/a
Growing days	37 days	n/a	37 days	n/a	n/a

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

41 years, 1909 to 1981

A day with at least 18.3 mm (0.7 in) of rain is expected about once in 2 years. A day with at least 47.1 mm (1.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Unity: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	18.3 mm (0.7 in)
5 years	24.4 mm (1.0 in)
10 years	28.9 mm (1.1 in)
25 years	35.5 mm (1.4 in)
50 years	41.0 mm (1.6 in)	Longer than the 41 years of record
100 years	47.1 mm (1.9 in)	Longer than the 41 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, 41 years of values from 1909 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: 46.2 mm (1.8 in) in 1909; 34.8 mm (1.4 in) in 1965; 34.8 mm (1.4 in) in 1980.

Download the Data

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