Orono Weather Records (USC00176430)

Record envelope, standing records and threshold days for Orono (USC00176430), Maine, United States, with 113 years of record.

Key Facts for Orono

Orono (USC00176430) is a weather station in Maine, United States at 44.90 latitude and -68.67 longitude, 35 m (115 ft) above sea level.
The station reports from 1893 to 2005, 113 years of record.
1,464 records set at Orono still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Orono tied a daily record low maximum temperature of 12.8 C (55.0 F) on 15 June 2005.

About the Station

Location: Maine, United States, 44.90 latitude, -68.67 longitude.
Elevation: 35 m (115 ft).
Period of record: 1893 to 2005, 113 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 Orono. 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 Orono, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	18.3 C (64.9 F)	-40.0 C (-40.0 F)	n/a	n/a
Feb	17.2 C (63.0 F)	-35.0 C (-31.0 F)	n/a	n/a
Mar	28.3 C (82.9 F)	-31.7 C (-25.1 F)	n/a	n/a
Apr	31.7 C (89.1 F)	-16.1 C (3.0 F)	n/a	n/a
May	37.2 C (99.0 F)	-7.2 C (19.0 F)	n/a	n/a
Jun	37.8 C (100.0 F)	-1.7 C (28.9 F)	n/a	n/a
Jul	38.9 C (102.0 F)	1.1 C (34.0 F)	n/a	n/a
Aug	40.0 C (104.0 F)	-1.1 C (30.0 F)	n/a	n/a
Sep	36.1 C (97.0 F)	-5.6 C (21.9 F)	n/a	n/a
Oct	32.2 C (90.0 F)	-10.6 C (12.9 F)	n/a	n/a
Nov	25.6 C (78.1 F)	-22.2 C (-8.0 F)	n/a	n/a
Dec	17.8 C (64.0 F)	-35.0 C (-31.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Orono still stand. 1898 holds the most, with 27.

Standing records at Orono by the year they were set
Year set	Standing records
1893	13
1894	23
1895	18
1896	19
1897	11
1898	27
1899	23
1900	14
1901	18
1902	20
1903	26
1904	23
1905	21
1906	21
1907	16
1908	19
1909	22
1910	19
1911	22
1912	18
1913	21
1914	20
1915	10
1916	8
1917	6
1918	20
1919	13
1920	12
1921	17
1922	17
1923	22
1924	4
1925	10
1926	9
1927	20
1928	11
1929	3
1930	16
1931	16
1932	16
1933	13
1934	22
1935	17
1936	27
1937	24
1938	21
1939	10
1940	12
1941	11
1942	18
1943	18
1944	16
1945	22
1946	17
1947	1
1948	8
1949	6
1951	16
1952	10
1953	26
1954	15
1955	7
1956	16
1957	6
1958	3
1961	5
1962	22
1963	11
1964	11
1965	9
1966	11
1967	12
1968	5
1969	6
1970	9
1971	5
1972	2
1973	10
1974	15
1975	7
1976	14
1977	20
1978	6
1979	12
1980	9
1981	15
1982	17
1983	9
1984	14
1985	6
1986	5
1987	4
1988	13
1989	14
1990	9
1991	8
1992	15
1993	6
1994	4
1995	8
1996	17
1997	6
1998	4
1999	19
2000	3
2001	13
2003	19
2004	6
2005	3

All-Time Record Progression

7 new records

7 all-time records were set at Orono between 14 August 1928 and 14 January 2004. Each dot is a new record.

When Orono set new all-time records
Date	Kind	Detail
1928-08-14	Record high minimum temperature	Record high minimum temperature 27.8 C (82.0 F)
1928-08-15	Record high minimum temperature	Record high minimum temperature 28.9 C (84.0 F)
1933-12-29	Record low maximum temperature	Record low maximum temperature -20.6 C (-5.1 F)
1935-08-17	Record high maximum temperature	Record high maximum temperature 38.9 C (102.0 F)
1935-08-18	Record high maximum temperature	Record high maximum temperature 40.0 C (104.0 F)
1962-12-30	Record daily snowfall	Record daily snowfall 101.6 cm (40.0 in)
2004-01-14	Record low maximum temperature	Record low maximum temperature -21.1 C (-6.0 F)

Wettest Day of Each Month

Jun: 122.9 mm (4.8 in)

The wettest day on record for each calendar month at Orono. The most was 122.9 mm (4.8 in) on 22 June 1922.

Record daily precipitation for each month at Orono
Month	Record daily precipitation (mm)	Date
Jan	72.6 mm (2.9 in)	18 January 1999
Feb	73.9 mm (2.9 in)	22 February 1898
Mar	116.8 mm (4.6 in)	4 March 1896
Apr	59.2 mm (2.3 in)	25 April 1983
May	62.2 mm (2.4 in)	31 May 1912
Jun	122.9 mm (4.8 in)	22 June 1922
Jul	101.6 mm (4.0 in)	9 July 1915
Aug	84.3 mm (3.3 in)	19 August 1965
Sep	110.2 mm (4.3 in)	6 September 1896
Oct	87.4 mm (3.4 in)	28 October 1932
Nov	104.6 mm (4.1 in)	25 November 1983
Dec	106.7 mm (4.2 in)	30 December 1962

Period of Record Coverage

1893 to 2005

111 years of record at Orono, 1893 to 2005. 27 years have data for under 90 percent of days and are left out of rankings: 1893, 1895, 1896, 1912, 1914, 1915, 1916, 1917 and others.

Days with data per year at Orono
Year	Days with data	Share of year	Complete
1893	146	40%	No
1894	359	98%	Yes
1895	262	72%	No
1896	160	44%	No
1897	356	98%	Yes
1898	361	99%	Yes
1899	356	98%	Yes
1900	358	98%	Yes
1901	357	98%	Yes
1902	354	97%	Yes
1903	364	100%	Yes
1904	366	100%	Yes
1905	365	100%	Yes
1906	365	100%	Yes
1907	365	100%	Yes
1908	366	100%	Yes
1909	365	100%	Yes
1910	345	95%	Yes
1911	348	95%	Yes
1912	241	66%	No
1913	332	91%	Yes
1914	304	83%	No
1915	305	84%	No
1916	245	67%	No
1917	244	67%	No
1918	337	92%	Yes
1919	365	100%	Yes
1920	359	98%	Yes
1921	345	95%	Yes
1922	321	88%	No
1923	112	31%	No
1924	151	41%	No
1925	208	57%	No
1926	244	67%	No
1927	117	32%	No
1928	360	98%	Yes
1929	357	98%	Yes
1930	358	98%	Yes
1931	362	99%	Yes
1932	366	100%	Yes
1933	365	100%	Yes
1934	357	98%	Yes
1935	365	100%	Yes
1936	366	100%	Yes
1937	364	100%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	335	92%	Yes
1941	363	99%	Yes
1942	362	99%	Yes
1943	365	100%	Yes
1944	353	96%	Yes
1945	362	99%	Yes
1946	361	99%	Yes
1947	120	33%	No
1948	178	49%	No
1949	61	17%	No
1950	62	17%	No
1951	153	42%	No
1952	365	100%	Yes
1953	363	99%	Yes
1954	302	83%	No
1955	275	75%	No
1956	359	98%	Yes
1957	360	99%	Yes
1958	358	98%	Yes
1959	114	31%	No
1961	113	31%	No
1962	360	99%	Yes
1963	365	100%	Yes
1964	365	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	364	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	363	99%	Yes
1975	365	100%	Yes
1976	365	100%	Yes
1977	329	90%	Yes
1978	362	99%	Yes
1979	364	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	360	99%	Yes
1983	362	99%	Yes
1984	360	98%	Yes
1985	361	99%	Yes
1986	362	99%	Yes
1987	360	99%	Yes
1988	362	99%	Yes
1989	361	99%	Yes
1990	363	99%	Yes
1991	363	99%	Yes
1992	362	99%	Yes
1993	361	99%	Yes
1994	361	99%	Yes
1995	364	100%	Yes
1996	361	99%	Yes
1997	353	97%	Yes
1998	358	98%	Yes
1999	354	97%	Yes
2000	212	58%	No
2001	298	82%	No
2003	354	97%	Yes
2004	296	81%	No
2005	20	5%	No

Latest Records

Latest records at Orono
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 June 2005	Orono, US	daily low max (Tie)	12.8 C (55.0 F)	tie	74 years	8 of 100 (Routine)
13 June 2005	Orono, US	daily high min	20.6 C (69.1 F)	1.7 C (3.1 F)	63 years	32 of 100 (Routine)
11 June 2005	Orono, US	daily high min	17.8 C (64.0 F)	1.7 C (3.1 F)	91 years	41 of 100 (Notable)
11 June 2005	Orono, US	daily high max	34.4 C (93.9 F)	1.1 C (2.0 F)	28 years	20 of 100 (Routine)
8 June 2005	Orono, US	daily high min (Tie)	16.7 C (62.1 F)	tie	83 years	8 of 100 (Routine)
9 June 2004	Orono, US	daily high min	17.2 C (63.0 F)	0.5 C (0.9 F)	96 years	39 of 100 (Notable)
9 June 2004	Orono, US	daily high max (Tie)	33.3 C (91.9 F)	tie	20 years	4 of 100 (Routine)
26 May 2004	Orono, US	daily low max	7.8 C (46.0 F)	1.1 C (2.0 F)	37 years	23 of 100 (Routine)
15 May 2004	Orono, US	daily high max (Tie)	29.4 C (84.9 F)	tie	72 years	7 of 100 (Routine)
30 April 2004	Orono, US	daily high max (Tie)	28.9 C (84.0 F)	tie	104 years	10 of 100 (Routine)
29 February 2004	Orono, US	daily high max	7.8 C (46.0 F)	0.6 C (1.1 F)	8 years	13 of 100 (Routine)
26 January 2004	Orono, US	daily low max (Tie)	-13.9 C (7.0 F)	tie	96 years	9 of 100 (Routine)
15 January 2004	Orono, US	daily low max (Tie)	-19.4 C (-2.9 F)	tie	57 years	6 of 100 (Routine)
14 January 2004	Orono, US	all-time low max	-21.1 C (-6.0 F)	0.5 C (0.9 F)	70 years	51 of 100 (Notable)
9 January 2004	Orono, US	daily low max	-16.1 C (3.0 F)	0.5 C (0.9 F)	36 years	20 of 100 (Routine)
8 January 2004	Orono, US	daily low max	-16.1 C (3.0 F)	0.5 C (0.9 F)	61 years	28 of 100 (Routine)
25 December 2003	Orono, US	daily high max	11.7 C (53.1 F)	2.8 C (5.0 F)	92 years	41 of 100 (Notable)
24 December 2003	Orono, US	daily high max	12.8 C (55.0 F)	2.8 C (5.0 F)	101 years	44 of 100 (Notable)
24 December 2003	Orono, US	daily high min	2.8 C (37.0 F)	1.1 C (2.0 F)	102 years	41 of 100 (Notable)
15 December 2003	Orono, US	daily snowfall	61.0 cm (24.0 in)	43.2 cm (17.0 in)	52 years	65 of 100 (Major)

Climate Trend

77 complete years, 1894 to 2003

One stripe for each of 77 complete years at Orono, 1894 to 2003. Blue stripes are years cooler than the station's own mean of 6.5 C (43.7 F); red stripes are warmer. The coolest year was 1962, at 4.4 C (40.0 F), and the warmest was 1999, at 8.8 C (47.9 F). The strongest colour marks a difference of 2.4 C (4.3 F).

Annual mean temperature at Orono as warming stripes, 1894 to 2003
Year	Annual mean temperature	Difference from the station mean
1894	5.3 C	-1.19 C
1897	5.7 C	-0.86 C
1898	6.5 C	-0.04 C
1899	6.3 C	-0.24 C
1900	6.3 C	-0.20 C
1901	6.0 C	-0.56 C
1902	6.0 C	-0.54 C
1903	6.0 C	-0.49 C
1904	4.8 C	-1.69 C
1905	5.6 C	-0.90 C
1906	6.4 C	-0.16 C
1907	5.5 C	-1.02 C
1908	7.0 C	+0.51 C
1909	6.7 C	+0.15 C
1919	6.6 C	+0.03 C
1920	5.6 C	-0.95 C
1921	6.2 C	-0.37 C
1928	6.9 C	+0.33 C
1929	6.8 C	+0.28 C
1930	7.9 C	+1.34 C
1931	7.9 C	+1.34 C
1932	7.4 C	+0.85 C
1933	6.5 C	-0.01 C
1934	6.2 C	-0.32 C
1935	6.7 C	+0.12 C
1936	6.8 C	+0.26 C
1937	8.1 C	+1.55 C
1938	7.6 C	+1.04 C
1939	6.2 C	-0.30 C
1941	7.2 C	+0.66 C
1942	7.0 C	+0.46 C
1943	5.7 C	-0.79 C
1945	6.6 C	+0.06 C
1946	6.7 C	+0.16 C
1952	7.7 C	+1.16 C
1953	8.6 C	+2.03 C
1956	6.5 C	+0.01 C
1957	7.8 C	+1.30 C
1958	7.0 C	+0.51 C
1962	4.4 C	-2.10 C
1963	4.8 C	-1.71 C
1964	5.3 C	-1.22 C
1965	5.2 C	-1.37 C
1966	6.1 C	-0.46 C
1967	5.9 C	-0.65 C
1968	7.2 C	+0.63 C
1969	6.7 C	+0.19 C
1970	6.3 C	-0.28 C
1971	6.6 C	+0.02 C
1972	6.5 C	-0.08 C
1973	8.0 C	+1.48 C
1974	6.8 C	+0.28 C
1975	7.1 C	+0.61 C
1976	6.4 C	-0.18 C
1978	5.9 C	-0.68 C
1979	6.6 C	+0.07 C
1980	5.9 C	-0.66 C
1981	7.9 C	+1.32 C
1982	7.5 C	+0.95 C
1983	8.2 C	+1.64 C
1984	6.1 C	-0.48 C
1985	4.9 C	-1.63 C
1986	6.0 C	-0.57 C
1987	6.6 C	+0.07 C
1988	7.1 C	+0.61 C
1989	4.7 C	-1.84 C
1990	6.1 C	-0.42 C
1991	5.9 C	-0.66 C
1992	4.9 C	-1.60 C
1993	6.5 C	-0.04 C
1994	6.9 C	+0.33 C
1995	7.3 C	+0.72 C
1996	7.6 C	+1.09 C
1997	6.1 C	-0.45 C
1998	7.1 C	+0.53 C
1999	8.8 C	+2.30 C
2003	6.9 C	+0.35 C

The fitted trend in annual mean temperature here over 1894 to 2003 is 0.04 C (-0.02 to 0.11) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.07 F (-0.04 to 0.19) per decade. The slope is a straight line fitted to 77 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Orono
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.04 C (-0.02 to 0.11) per decade	0.07 F (-0.04 to 0.19) per decade	1894 to 2003	77	Not clearly different from zero
Mean daily maximum	-0.04 C (-0.11 to 0.03) per decade	-0.1 F (-0.2 to 0.1) per decade	1894 to 2003	77	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	1894 to 2003	77	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 2005

Yearly extremes at Orono: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.0 C (104.0 F)	1935	34.4 C (93.9 F)	111
Coldest night (TNn)	-40.0 C (-40.0 F)	1907	-27.2 C (-17.0 F)	111
Wettest day (Rx1day)	122.9 mm (4.8 in)	1922	54.9 mm (2.2 in)	111
Wettest five days (Rx5day)	195.5 mm (7.7 in)	1954	77.7 mm (3.1 in)	111
Longest dry spell (CDD)	41 days	1908	16 days	111

Hottest day (TXx)

The hottest day of the year at Orono, 1893 to 2005. The record is 40.0 C (104.0 F) in 1935, marked on the chart; the median year is 34.4 C (93.9 F).

Hottest day (TXx) at Orono by year
Year	Hottest day (TXx)
1893	35.0 C (95.0 F)
1894	34.4 C (93.9 F)
1895	36.1 C (97.0 F)
1896	33.3 C (91.9 F)
1897	33.9 C (93.0 F)
1898	37.2 C (99.0 F)
1899	33.9 C (93.0 F)
1900	34.4 C (93.9 F)
1901	37.8 C (100.0 F)
1902	30.6 C (87.1 F)
1903	31.7 C (89.1 F)
1904	31.1 C (88.0 F)
1905	32.2 C (90.0 F)
1906	35.0 C (95.0 F)
1907	32.8 C (91.0 F)
1908	36.1 C (97.0 F)
1909	36.1 C (97.0 F)
1910	32.8 C (91.0 F)
1911	35.6 C (96.1 F)
1912	35.0 C (95.0 F)
1913	35.6 C (96.1 F)
1914	32.8 C (91.0 F)
1915	31.7 C (89.1 F)
1916	34.4 C (93.9 F)
1917	32.8 C (91.0 F)
1918	33.3 C (91.9 F)
1919	36.7 C (98.1 F)
1920	33.3 C (91.9 F)
1921	33.3 C (91.9 F)
1922	31.7 C (89.1 F)
1923	21.7 C (71.1 F)
1924	31.1 C (88.0 F)
1925	32.2 C (90.0 F)
1926	33.9 C (93.0 F)
1927	31.1 C (88.0 F)
1928	35.0 C (95.0 F)
1929	34.4 C (93.9 F)
1930	34.4 C (93.9 F)
1931	36.1 C (97.0 F)
1932	36.7 C (98.1 F)
1933	34.4 C (93.9 F)
1934	33.3 C (91.9 F)
1935	40.0 C (104.0 F)
1936	32.2 C (90.0 F)
1937	36.7 C (98.1 F)
1938	36.7 C (98.1 F)
1939	36.1 C (97.0 F)
1940	35.0 C (95.0 F)
1941	36.7 C (98.1 F)
1942	35.6 C (96.1 F)
1943	35.0 C (95.0 F)
1944	36.7 C (98.1 F)
1945	35.6 C (96.1 F)
1946	35.0 C (95.0 F)
1947	18.9 C (66.0 F)
1948	33.3 C (91.9 F)
1949	13.3 C (55.9 F)
1950	32.2 C (90.0 F)
1951	33.3 C (91.9 F)
1952	36.7 C (98.1 F)
1953	35.0 C (95.0 F)
1954	33.3 C (91.9 F)
1955	35.0 C (95.0 F)
1956	33.3 C (91.9 F)
1957	32.2 C (90.0 F)
1958	30.0 C (86.0 F)
1959	21.7 C (71.1 F)
1961	31.1 C (88.0 F)
1962	32.2 C (90.0 F)
1963	33.9 C (93.0 F)
1964	32.2 C (90.0 F)
1965	33.3 C (91.9 F)
1966	31.7 C (89.1 F)
1967	32.2 C (90.0 F)
1968	35.6 C (96.1 F)
1969	32.8 C (91.0 F)
1970	36.7 C (98.1 F)
1971	34.4 C (93.9 F)
1972	32.8 C (91.0 F)
1973	35.6 C (96.1 F)
1974	32.8 C (91.0 F)
1975	35.6 C (96.1 F)
1976	35.6 C (96.1 F)
1977	37.2 C (99.0 F)
1978	35.0 C (95.0 F)
1979	33.3 C (91.9 F)
1980	35.6 C (96.1 F)
1981	34.4 C (93.9 F)
1982	38.9 C (102.0 F)
1983	35.6 C (96.1 F)
1984	33.9 C (93.0 F)
1985	33.3 C (91.9 F)
1986	34.4 C (93.9 F)
1987	36.7 C (98.1 F)
1988	37.8 C (100.0 F)
1989	34.4 C (93.9 F)
1990	31.1 C (88.0 F)
1991	34.4 C (93.9 F)
1992	31.1 C (88.0 F)
1993	35.6 C (96.1 F)
1994	35.0 C (95.0 F)
1995	35.0 C (95.0 F)
1996	35.6 C (96.1 F)
1997	36.1 C (97.0 F)
1998	35.6 C (96.1 F)
1999	36.1 C (97.0 F)
2000	32.2 C (90.0 F)
2001	36.7 C (98.1 F)
2003	36.7 C (98.1 F)
2004	33.3 C (91.9 F)
2005	34.4 C (93.9 F)

Coldest night (TNn)

The coldest night of the year at Orono, 1893 to 2005. The record is -40.0 C (-40.0 F) in 1907, marked on the chart; the median year is -27.2 C (-17.0 F).

Coldest night (TNn) at Orono by year
Year	Coldest night (TNn)
1893	-30.0 C (-22.0 F)
1894	-35.6 C (-32.1 F)
1895	-23.3 C (-9.9 F)
1896	-34.4 C (-29.9 F)
1897	-27.8 C (-18.0 F)
1898	-34.4 C (-29.9 F)
1899	-29.4 C (-20.9 F)
1900	-29.4 C (-20.9 F)
1901	-28.9 C (-20.0 F)
1902	-28.9 C (-20.0 F)
1903	-30.6 C (-23.1 F)
1904	-32.8 C (-27.0 F)
1905	-34.4 C (-29.9 F)
1906	-29.4 C (-20.9 F)
1907	-40.0 C (-40.0 F)
1908	-31.1 C (-24.0 F)
1909	-31.1 C (-24.0 F)
1910	-30.6 C (-23.1 F)
1911	-30.0 C (-22.0 F)
1912	-35.0 C (-31.0 F)
1913	-28.3 C (-18.9 F)
1914	-31.1 C (-24.0 F)
1915	-29.4 C (-20.9 F)
1916	-24.4 C (-11.9 F)
1917	-33.9 C (-29.0 F)
1918	-33.3 C (-27.9 F)
1919	-27.2 C (-17.0 F)
1920	-33.9 C (-29.0 F)
1921	-24.4 C (-11.9 F)
1922	-29.4 C (-20.9 F)
1923	-32.2 C (-26.0 F)
1924	-28.3 C (-18.9 F)
1925	-17.2 C (1.0 F)
1926	-19.4 C (-2.9 F)
1927	-26.7 C (-16.1 F)
1928	-23.3 C (-9.9 F)
1929	-25.0 C (-13.0 F)
1930	-27.8 C (-18.0 F)
1931	-29.4 C (-20.9 F)
1932	-25.0 C (-13.0 F)
1933	-35.0 C (-31.0 F)
1934	-32.8 C (-27.0 F)
1935	-32.8 C (-27.0 F)
1936	-26.7 C (-16.1 F)
1937	-26.1 C (-15.0 F)
1938	-26.7 C (-16.1 F)
1939	-24.4 C (-11.9 F)
1940	-23.3 C (-9.9 F)
1941	-23.3 C (-9.9 F)
1942	-28.9 C (-20.0 F)
1943	-31.1 C (-24.0 F)
1944	-25.0 C (-13.0 F)
1945	-31.7 C (-25.1 F)
1946	-27.8 C (-18.0 F)
1947	-28.9 C (-20.0 F)
1948	-33.9 C (-29.0 F)
1949	-21.1 C (-6.0 F)
1950	-20.0 C (-4.0 F)
1951	-30.0 C (-22.0 F)
1952	-26.7 C (-16.1 F)
1953	-20.0 C (-4.0 F)
1954	-28.3 C (-18.9 F)
1955	-22.8 C (-9.0 F)
1956	-29.4 C (-20.9 F)
1957	-30.0 C (-22.0 F)
1958	-23.9 C (-11.0 F)
1959	-23.3 C (-9.9 F)
1961	-14.4 C (6.1 F)
1962	-32.2 C (-26.0 F)
1963	-26.7 C (-16.1 F)
1964	-22.8 C (-9.0 F)
1965	-27.8 C (-18.0 F)
1966	-24.4 C (-11.9 F)
1967	-26.7 C (-16.1 F)
1968	-26.7 C (-16.1 F)
1969	-23.3 C (-9.9 F)
1970	-26.1 C (-15.0 F)
1971	-32.2 C (-26.0 F)
1972	-27.8 C (-18.0 F)
1973	-25.6 C (-14.1 F)
1974	-28.3 C (-18.9 F)
1975	-26.1 C (-15.0 F)
1976	-28.9 C (-20.0 F)
1977	-25.6 C (-14.1 F)
1978	-22.8 C (-9.0 F)
1979	-25.0 C (-13.0 F)
1980	-25.6 C (-14.1 F)
1981	-28.9 C (-20.0 F)
1982	-28.9 C (-20.0 F)
1983	-21.1 C (-6.0 F)
1984	-28.3 C (-18.9 F)
1985	-25.6 C (-14.1 F)
1986	-25.0 C (-13.0 F)
1987	-26.1 C (-15.0 F)
1988	-26.7 C (-16.1 F)
1989	-30.0 C (-22.0 F)
1990	-24.4 C (-11.9 F)
1991	-25.6 C (-14.1 F)
1992	-23.9 C (-11.0 F)
1993	-27.8 C (-18.0 F)
1994	-28.3 C (-18.9 F)
1995	-26.1 C (-15.0 F)
1996	-23.3 C (-9.9 F)
1997	-22.2 C (-8.0 F)
1998	-23.3 C (-9.9 F)
1999	-26.7 C (-16.1 F)
2000	-13.3 C (8.1 F)
2001	-24.4 C (-11.9 F)
2003	-26.1 C (-15.0 F)
2004	-26.1 C (-15.0 F)
2005	6.1 C (43.0 F)

Wettest day (Rx1day)

The wettest day of the year at Orono, 1893 to 2005. The record is 122.9 mm (4.8 in) in 1922, marked on the chart; the median year is 54.9 mm (2.2 in).

Wettest day (Rx1day) at Orono by year
Year	Wettest day (Rx1day)
1893	81.8 mm (3.2 in)
1894	45.7 mm (1.8 in)
1895	51.1 mm (2.0 in)
1896	116.8 mm (4.6 in)
1897	45.5 mm (1.8 in)
1898	73.9 mm (2.9 in)
1899	50.8 mm (2.0 in)
1900	57.2 mm (2.3 in)
1901	68.6 mm (2.7 in)
1902	67.8 mm (2.7 in)
1903	57.2 mm (2.3 in)
1904	60.2 mm (2.4 in)
1905	47.0 mm (1.9 in)
1906	51.3 mm (2.0 in)
1907	55.4 mm (2.2 in)
1908	60.5 mm (2.4 in)
1909	66.5 mm (2.6 in)
1910	35.6 mm (1.4 in)
1911	68.1 mm (2.7 in)
1912	62.2 mm (2.4 in)
1913	38.6 mm (1.5 in)
1914	48.3 mm (1.9 in)
1915	101.6 mm (4.0 in)
1916	48.5 mm (1.9 in)
1917	48.8 mm (1.9 in)
1918	48.5 mm (1.9 in)
1919	41.9 mm (1.6 in)
1920	40.6 mm (1.6 in)
1921	27.2 mm (1.1 in)
1922	122.9 mm (4.8 in)
1923	48.5 mm (1.9 in)
1924	57.2 mm (2.3 in)
1925	69.9 mm (2.8 in)
1926	83.8 mm (3.3 in)
1927	58.4 mm (2.3 in)
1928	49.0 mm (1.9 in)
1929	49.8 mm (2.0 in)
1930	48.8 mm (1.9 in)
1931	72.4 mm (2.9 in)
1932	87.4 mm (3.4 in)
1933	50.0 mm (2.0 in)
1934	74.2 mm (2.9 in)
1935	49.0 mm (1.9 in)
1936	73.7 mm (2.9 in)
1937	79.2 mm (3.1 in)
1938	64.3 mm (2.5 in)
1939	67.6 mm (2.7 in)
1940	50.0 mm (2.0 in)
1941	34.0 mm (1.3 in)
1942	60.5 mm (2.4 in)
1943	63.8 mm (2.5 in)
1944	108.2 mm (4.3 in)
1945	29.5 mm (1.2 in)
1946	38.4 mm (1.5 in)
1947	15.7 mm (0.6 in)
1948	28.4 mm (1.1 in)
1949	31.0 mm (1.2 in)
1950	53.8 mm (2.1 in)
1951	51.3 mm (2.0 in)
1952	53.6 mm (2.1 in)
1953	49.3 mm (1.9 in)
1954	101.9 mm (4.0 in)
1955	59.9 mm (2.4 in)
1956	30.5 mm (1.2 in)
1957	30.0 mm (1.2 in)
1958	62.2 mm (2.4 in)
1959	23.6 mm (0.9 in)
1961	38.6 mm (1.5 in)
1962	106.7 mm (4.2 in)
1963	45.2 mm (1.8 in)
1964	45.5 mm (1.8 in)
1965	84.3 mm (3.3 in)
1966	97.8 mm (3.9 in)
1967	39.9 mm (1.6 in)
1968	48.8 mm (1.9 in)
1969	64.3 mm (2.5 in)
1970	58.7 mm (2.3 in)
1971	39.6 mm (1.6 in)
1972	77.2 mm (3.0 in)
1973	59.7 mm (2.4 in)
1974	36.3 mm (1.4 in)
1975	69.6 mm (2.7 in)
1976	63.0 mm (2.5 in)
1977	62.2 mm (2.4 in)
1978	59.7 mm (2.4 in)
1979	60.5 mm (2.4 in)
1980	42.4 mm (1.7 in)
1981	54.6 mm (2.1 in)
1982	38.4 mm (1.5 in)
1983	104.6 mm (4.1 in)
1984	58.7 mm (2.3 in)
1985	65.3 mm (2.6 in)
1986	42.4 mm (1.7 in)
1987	47.0 mm (1.9 in)
1988	53.8 mm (2.1 in)
1989	57.2 mm (2.3 in)
1990	65.3 mm (2.6 in)
1991	55.4 mm (2.2 in)
1992	61.7 mm (2.4 in)
1993	54.9 mm (2.2 in)
1994	45.5 mm (1.8 in)
1995	56.9 mm (2.2 in)
1996	62.7 mm (2.5 in)
1997	36.8 mm (1.4 in)
1998	48.8 mm (1.9 in)
1999	78.7 mm (3.1 in)
2000	37.1 mm (1.5 in)
2001	35.1 mm (1.4 in)
2003	57.7 mm (2.3 in)
2004	39.9 mm (1.6 in)
2005	33.5 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Orono, 1893 to 2005. The record is 195.5 mm (7.7 in) in 1954, marked on the chart; the median year is 77.7 mm (3.1 in).

Wettest five days (Rx5day) at Orono by year
Year	Wettest five days (Rx5day)
1893	67.8 mm (2.7 in)
1894	38.9 mm (1.5 in)
1895	72.6 mm (2.9 in)
1896	136.6 mm (5.4 in)
1897	63.5 mm (2.5 in)
1898	136.7 mm (5.4 in)
1899	59.2 mm (2.3 in)
1900	108.7 mm (4.3 in)
1901	84.8 mm (3.3 in)
1902	119.6 mm (4.7 in)
1903	85.6 mm (3.4 in)
1904	77.7 mm (3.1 in)
1905	67.3 mm (2.6 in)
1906	84.3 mm (3.3 in)
1907	78.0 mm (3.1 in)
1908	91.0 mm (3.6 in)
1909	161.5 mm (6.4 in)
1910	72.1 mm (2.8 in)
1911	70.6 mm (2.8 in)
1912	119.1 mm (4.7 in)
1913	68.5 mm (2.7 in)
1914	68.6 mm (2.7 in)
1915	125.2 mm (4.9 in)
1916	78.7 mm (3.1 in)
1917	80.0 mm (3.1 in)
1918	76.2 mm (3.0 in)
1919	50.8 mm (2.0 in)
1920	75.4 mm (3.0 in)
1921	30.5 mm (1.2 in)
1922	52.1 mm (2.1 in)
1923	59.8 mm (2.4 in)
1924	40.6 mm (1.6 in)
1925	132.3 mm (5.2 in)
1926	122.9 mm (4.8 in)
1927	94.0 mm (3.7 in)
1928	96.4 mm (3.8 in)
1929	53.7 mm (2.1 in)
1930	72.7 mm (2.9 in)
1931	144.3 mm (5.7 in)
1932	110.8 mm (4.4 in)
1933	70.6 mm (2.8 in)
1934	84.9 mm (3.3 in)
1935	81.0 mm (3.2 in)
1936	81.3 mm (3.2 in)
1937	131.2 mm (5.2 in)
1938	76.0 mm (3.0 in)
1939	86.9 mm (3.4 in)
1940	65.0 mm (2.6 in)
1941	54.3 mm (2.1 in)
1942	105.5 mm (4.2 in)
1943	106.1 mm (4.2 in)
1944	113.8 mm (4.5 in)
1945	79.3 mm (3.1 in)
1946	55.1 mm (2.2 in)
1947	23.1 mm (0.9 in)
1948	58.4 mm (2.3 in)
1949	66.0 mm (2.6 in)
1950	94.2 mm (3.7 in)
1951	66.0 mm (2.6 in)
1952	86.6 mm (3.4 in)
1953	99.6 mm (3.9 in)
1954	195.5 mm (7.7 in)
1955	69.9 mm (2.8 in)
1956	46.0 mm (1.8 in)
1957	68.6 mm (2.7 in)
1958	74.9 mm (2.9 in)
1959	45.0 mm (1.8 in)
1961	68.3 mm (2.7 in)
1962	113.1 mm (4.5 in)
1963	113.1 mm (4.5 in)
1964	66.8 mm (2.6 in)
1965	103.4 mm (4.1 in)
1966	112.1 mm (4.4 in)
1967	68.0 mm (2.7 in)
1968	55.7 mm (2.2 in)
1969	123.5 mm (4.9 in)
1970	87.7 mm (3.5 in)
1971	75.2 mm (3.0 in)
1972	104.9 mm (4.1 in)
1973	96.8 mm (3.8 in)
1974	67.1 mm (2.6 in)
1975	85.6 mm (3.4 in)
1976	72.4 mm (2.9 in)
1977	105.8 mm (4.2 in)
1978	65.1 mm (2.6 in)
1979	114.6 mm (4.5 in)
1980	72.5 mm (2.9 in)
1981	94.0 mm (3.7 in)
1982	63.2 mm (2.5 in)
1983	154.1 mm (6.1 in)
1984	75.0 mm (3.0 in)
1985	65.3 mm (2.6 in)
1986	79.5 mm (3.1 in)
1987	83.0 mm (3.3 in)
1988	66.5 mm (2.6 in)
1989	84.1 mm (3.3 in)
1990	67.3 mm (2.6 in)
1991	102.6 mm (4.0 in)
1992	70.1 mm (2.8 in)
1993	78.5 mm (3.1 in)
1994	64.7 mm (2.5 in)
1995	73.6 mm (2.9 in)
1996	133.5 mm (5.3 in)
1997	45.7 mm (1.8 in)
1998	58.1 mm (2.3 in)
1999	127.3 mm (5.0 in)
2000	81.8 mm (3.2 in)
2001	44.0 mm (1.7 in)
2003	81.8 mm (3.2 in)
2004	58.4 mm (2.3 in)
2005	46.0 mm (1.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Orono, 1893 to 2005. The record is 41 days in 1908, marked on the chart; the median year is 16 days.

Longest dry spell (CDD) at Orono by year
Year	Longest dry spell (CDD)
1893	11 days
1894	16 days
1895	20 days
1896	12 days
1897	15 days
1898	21 days
1899	34 days
1900	20 days
1901	17 days
1902	15 days
1903	20 days
1904	15 days
1905	23 days
1906	12 days
1907	14 days
1908	41 days
1909	14 days
1910	13 days
1911	19 days
1912	19 days
1913	15 days
1914	14 days
1915	26 days
1916	11 days
1917	12 days
1918	28 days
1919	20 days
1920	21 days
1921	16 days
1922	11 days
1923	9 days
1924	14 days
1925	12 days
1926	9 days
1927	21 days
1928	20 days
1929	12 days
1930	17 days
1931	11 days
1932	13 days
1933	13 days
1934	23 days
1935	19 days
1936	14 days
1937	13 days
1938	15 days
1939	16 days
1940	16 days
1941	25 days
1942	14 days
1943	13 days
1944	23 days
1945	17 days
1946	15 days
1947	7 days
1948	13 days
1949	18 days
1950	20 days
1951	12 days
1952	24 days
1953	28 days
1954	19 days
1955	16 days
1956	18 days
1957	16 days
1958	15 days
1959	16 days
1961	14 days
1962	16 days
1963	16 days
1964	14 days
1965	22 days
1966	18 days
1967	21 days
1968	21 days
1969	13 days
1970	25 days
1971	14 days
1972	11 days
1973	12 days
1974	15 days
1975	18 days
1976	20 days
1977	14 days
1978	22 days
1979	21 days
1980	22 days
1981	14 days
1982	17 days
1983	16 days
1984	17 days
1985	19 days
1986	13 days
1987	18 days
1988	15 days
1989	11 days
1990	17 days
1991	14 days
1992	35 days
1993	18 days
1994	15 days
1995	23 days
1996	14 days
1997	15 days
1998	13 days
1999	15 days
2000	10 days
2001	17 days
2003	16 days
2004	16 days
2005	6 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

77 years with a frost

Across 77 years with a frost, the median last spring frost at Orono falls on 14 May and the median first autumn frost on 25 September, which leaves a median of 135 days between them.

In 1970 to 2003 the median growing season was 145 days. That is 18 days more than in 1894 to 1941.

Fitted over all years, the growing season changes by +2.9 days per decade at this station.

Frost dates and growing season at Orono
Measure	Median, all years	Earliest period (1894 to 1941)	Recent period (1970 to 2003)	Recent against earliest	Fitted trend
Last spring frost	14 May	16 May	9 May	7 days earlier	-1.1 days per decade
First autumn frost	25 September	20 September	3 October	13 days later	+1.7 days per decade
Growing days	135 days	127 days	145 days	18 days more	+2.9 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

79 years, 1897 to 2003

A day with at least 55.6 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 106.4 mm (4.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Orono: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	55.6 mm (2.2 in)
5 years	70.3 mm (2.8 in)
10 years	79.6 mm (3.1 in)
25 years	90.8 mm (3.6 in)
50 years	98.8 mm (3.9 in)
100 years	106.4 mm (4.2 in)	Longer than the 79 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, 79 years of values from 1897 to 2003.

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: 106.7 mm (4.2 in) in 1962; 104.6 mm (4.1 in) in 1983; 101.6 mm (4.0 in) in 1915.

Station Changes

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

Download the Data

Data for Orono standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Orono 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 2026-10-17 (17 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).