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
Record highRecord low2026 daily maximum2026 daily minimum
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
Year with most
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
Complete yearUnder 90 percent of days
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.
Cooler than the station meanWarmer than the station mean
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.