Record envelope, standing records and threshold days for Aurora (USC00250445), Nebraska, United States, with 115 years of record.
Key Facts for Aurora
Aurora (USC00250445) is a weather station in Nebraska, United States at 40.86 latitude and -98.00 longitude, 544 m (1,785 ft) above sea level.
The station reports from 1894 to 2008, 115 years of record.
1,464 records set at Aurora still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Aurora set a daily record precipitation of 38.1 mm (1.5 in) on 24 May 2008.
About the Station
Location: Nebraska, United States, 40.86 latitude, -98.00 longitude.
Elevation: 544 m (1,785 ft).
Period of record: 1894 to 2008, 115 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 Aurora. 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 Aurora, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.7 C (71.1 F)
-35.0 C (-31.0 F)
n/a
n/a
Feb
26.1 C (79.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Mar
32.8 C (91.0 F)
-23.9 C (-11.0 F)
n/a
n/a
Apr
37.8 C (100.0 F)
-12.2 C (10.0 F)
n/a
n/a
May
37.8 C (100.0 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
41.7 C (107.1 F)
3.9 C (39.0 F)
n/a
n/a
Jul
46.7 C (116.1 F)
5.6 C (42.1 F)
n/a
n/a
Aug
43.3 C (109.9 F)
5.0 C (41.0 F)
n/a
n/a
Sep
41.1 C (106.0 F)
-4.4 C (24.1 F)
n/a
n/a
Oct
35.6 C (96.1 F)
-20.6 C (-5.1 F)
n/a
n/a
Nov
28.9 C (84.0 F)
-22.8 C (-9.0 F)
n/a
n/a
Dec
25.6 C (78.1 F)
-33.3 C (-27.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Aurora still stand. 1913 holds the most, with 60.
Standing records at Aurora by the year they were set
Year set
Standing records
1900
55
1901
15
1902
28
1903
21
1904
15
1905
29
1906
34
1907
30
1908
16
1909
37
1910
29
1911
40
1912
13
1913
60
1914
3
1915
23
1916
15
1917
3
1932
6
1935
4
1936
21
1938
9
1940
9
1941
34
1942
29
1943
32
1944
22
1963
3
1964
32
1965
19
1966
18
1967
22
1968
17
1969
12
1970
20
1971
16
1972
24
1973
7
1974
17
1975
17
1976
17
1977
16
1978
12
1979
14
1980
13
1981
15
1982
12
1983
28
1984
11
1985
30
1986
24
1987
23
1988
14
1989
44
1990
19
1991
27
1992
15
1993
18
1994
16
1995
21
1996
24
1997
20
1998
21
1999
15
2000
21
2001
4
2002
25
2003
26
2004
15
2005
18
2006
15
2007
12
2008
3
All-Time Record Progression
7 new records
7 all-time records were set at Aurora between 9 July 1950 and 26 October 1997. Each dot is a new record.
When Aurora set new all-time records
Date
Kind
Detail
1950-07-09
Record daily precipitation
Record daily precipitation 146.1 mm (5.8 in)
1980-06-04
Record daily precipitation
Record daily precipitation 162.6 mm (6.4 in)
1983-12-21
Record low maximum temperature
Record low maximum temperature -22.2 C (-8.0 F)
1983-12-24
Record low maximum temperature
Record low maximum temperature -22.8 C (-9.0 F)
1983-12-25
Record low maximum temperature
Record low maximum temperature -23.3 C (-9.9 F)
1989-12-22
Record low maximum temperature
Record low maximum temperature -25.6 C (-14.1 F)
1997-10-26
Record daily snowfall
Record daily snowfall 31.8 cm (12.5 in)
Wettest Day of Each Month
Jun: 162.6 mm (6.4 in)
The wettest day on record for each calendar month at Aurora. The most was 162.6 mm (6.4 in) on 4 June 1980.
Record daily precipitation for each month at Aurora
Month
Record daily precipitation (mm)
Date
Jan
29.0 mm (1.1 in)
15 January 1960
Feb
44.7 mm (1.8 in)
19 February 1971
Mar
74.4 mm (2.9 in)
29 March 1981
Apr
75.2 mm (3.0 in)
13 April 1977
May
96.5 mm (3.8 in)
26 May 1939
Jun
162.6 mm (6.4 in)
4 June 1980
Jul
146.1 mm (5.8 in)
9 July 1950
Aug
88.9 mm (3.5 in)
17 August 1910
Sep
101.9 mm (4.0 in)
9 September 1914
Oct
71.1 mm (2.8 in)
12 October 1928
Nov
61.0 mm (2.4 in)
20 November 1975
Dec
30.5 mm (1.2 in)
29 December 1906
Period of Record Coverage
1901 to 2008
Complete yearUnder 90 percent of days
72 years of record at Aurora, 1901 to 2008. 21 years have data for under 90 percent of days and are left out of rankings: 1901, 1903, 1904, 1905, 1907, 1912, 1913, 1914 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 47 complete years at Aurora, 1902 to 2007. Blue stripes are years cooler than the station's own mean of 10.5 C (50.9 F); red stripes are warmer. The coolest year was 1993, at 8.4 C (47.2 F), and the warmest was 1987, at 11.8 C (53.2 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Aurora as warming stripes, 1902 to 2007
Year
Annual mean temperature
Difference from the station mean
1902
9.6 C
-0.86 C
1910
11.1 C
+0.65 C
1911
11.5 C
+1.02 C
1942
11.1 C
+0.66 C
1943
11.4 C
+0.88 C
1964
11.7 C
+1.21 C
1965
10.9 C
+0.44 C
1966
11.0 C
+0.48 C
1967
11.2 C
+0.68 C
1968
11.1 C
+0.65 C
1969
10.4 C
-0.12 C
1970
11.4 C
+0.94 C
1971
11.3 C
+0.79 C
1972
10.6 C
+0.16 C
1973
11.2 C
+0.76 C
1974
11.6 C
+1.14 C
1975
9.8 C
-0.68 C
1976
10.2 C
-0.29 C
1977
10.8 C
+0.32 C
1978
8.6 C
-1.90 C
1979
8.7 C
-1.79 C
1980
10.5 C
+0.02 C
1981
11.0 C
+0.52 C
1982
9.0 C
-1.44 C
1983
9.7 C
-0.81 C
1984
9.8 C
-0.73 C
1985
8.9 C
-1.59 C
1986
11.4 C
+0.96 C
1987
11.8 C
+1.28 C
1988
10.8 C
+0.31 C
1989
9.2 C
-1.33 C
1990
9.6 C
-0.93 C
1991
10.8 C
+0.27 C
1992
10.1 C
-0.36 C
1993
8.4 C
-2.04 C
1994
10.2 C
-0.27 C
1995
9.8 C
-0.65 C
1996
8.7 C
-1.76 C
1998
11.0 C
+0.52 C
1999
11.0 C
+0.54 C
2000
10.5 C
+0.05 C
2001
10.7 C
+0.21 C
2002
10.9 C
+0.46 C
2003
10.6 C
+0.13 C
2004
10.6 C
+0.12 C
2005
11.2 C
+0.75 C
2007
11.0 C
+0.53 C
The fitted trend in annual mean temperature here over 1902 to 2007 is -0.07 C (-0.19 to 0.04) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.1) per decade. The slope is a straight line fitted to 47 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Aurora
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.07 C (-0.19 to 0.04) per decade
-0.1 F (-0.3 to 0.1) per decade
1902 to 2007
47
Not clearly different from zero
Mean daily maximum
-0.18 C (-0.32 to -0.04) per decade
-0.3 F (-0.6 to -0.1) per decade
1902 to 2007
47
Fall
Mean daily minimum
0.03 C (-0.08 to 0.14) per decade
0.1 F (-0.1 to 0.3) per decade
1902 to 2007
47
Not clearly different from zero
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
1894 to 2008
Yearly extremes at Aurora: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
46.7 C (116.1 F)
1936
38.1 C (100.5 F)
72
Coldest night (TNn)
-35.0 C (-31.0 F)
1912
-24.4 C (-11.9 F)
73
Wettest day (Rx1day)
162.6 mm (6.4 in)
1980
59.7 mm (2.4 in)
111
Wettest five days (Rx5day)
250.7 mm (9.9 in)
1980
87.7 mm (3.5 in)
111
Longest dry spell (CDD)
74 days
1937
34 days
111
Hottest day (TXx)
The hottest day of the year at Aurora, 1894 to 2008. The record is 46.7 C (116.1 F) in 1936, marked on the chart; the median year is 38.1 C (100.5 F).
Hottest day (TXx) at Aurora by year
Year
Hottest day (TXx)
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
n/a
1899
n/a
1900
n/a
1901
41.1 C (106.0 F)
1902
36.1 C (97.0 F)
1903
37.8 C (100.0 F)
1904
36.7 C (98.1 F)
1905
36.7 C (98.1 F)
1906
38.9 C (102.0 F)
1907
39.4 C (102.9 F)
1908
37.2 C (99.0 F)
1909
38.9 C (102.0 F)
1910
41.1 C (106.0 F)
1911
41.1 C (106.0 F)
1912
35.6 C (96.1 F)
1913
41.7 C (107.1 F)
1914
36.1 C (97.0 F)
1915
35.6 C (96.1 F)
1916
39.4 C (102.9 F)
1917
30.6 C (87.1 F)
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
31.1 C (88.0 F)
1933
n/a
1934
n/a
1935
14.4 C (57.9 F)
1936
46.7 C (116.1 F)
1937
n/a
1938
35.6 C (96.1 F)
1939
n/a
1940
45.6 C (114.1 F)
1941
40.6 C (105.1 F)
1942
39.4 C (102.9 F)
1943
43.3 C (109.9 F)
1944
40.6 C (105.1 F)
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
22.8 C (73.0 F)
1964
41.7 C (107.1 F)
1965
38.9 C (102.0 F)
1966
40.0 C (104.0 F)
1967
37.8 C (100.0 F)
1968
38.9 C (102.0 F)
1969
38.9 C (102.0 F)
1970
38.9 C (102.0 F)
1971
40.6 C (105.1 F)
1972
36.7 C (98.1 F)
1973
39.4 C (102.9 F)
1974
40.0 C (104.0 F)
1975
37.8 C (100.0 F)
1976
37.2 C (99.0 F)
1977
37.8 C (100.0 F)
1978
38.9 C (102.0 F)
1979
38.3 C (100.9 F)
1980
38.9 C (102.0 F)
1981
39.4 C (102.9 F)
1982
36.1 C (97.0 F)
1983
42.2 C (108.0 F)
1984
38.3 C (100.9 F)
1985
39.4 C (102.9 F)
1986
36.7 C (98.1 F)
1987
37.8 C (100.0 F)
1988
41.7 C (107.1 F)
1989
37.2 C (99.0 F)
1990
38.3 C (100.9 F)
1991
38.9 C (102.0 F)
1992
34.4 C (93.9 F)
1993
35.0 C (95.0 F)
1994
36.7 C (98.1 F)
1995
41.1 C (106.0 F)
1996
35.6 C (96.1 F)
1997
35.6 C (96.1 F)
1998
37.2 C (99.0 F)
1999
36.7 C (98.1 F)
2000
37.2 C (99.0 F)
2001
37.2 C (99.0 F)
2002
38.9 C (102.0 F)
2003
37.8 C (100.0 F)
2004
35.6 C (96.1 F)
2005
37.2 C (99.0 F)
2006
40.0 C (104.0 F)
2007
35.6 C (96.1 F)
2008
29.4 C (84.9 F)
Coldest night (TNn)
The coldest night of the year at Aurora, 1894 to 2008. The record is -35.0 C (-31.0 F) in 1912, marked on the chart; the median year is -24.4 C (-11.9 F).
Coldest night (TNn) at Aurora by year
Year
Coldest night (TNn)
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
n/a
1899
n/a
1900
-6.7 C (19.9 F)
1901
-30.6 C (-23.1 F)
1902
-26.1 C (-15.0 F)
1903
-17.8 C (0.0 F)
1904
-21.7 C (-7.1 F)
1905
-30.6 C (-23.1 F)
1906
-21.7 C (-7.1 F)
1907
-23.9 C (-11.0 F)
1908
-23.3 C (-9.9 F)
1909
-25.6 C (-14.1 F)
1910
-26.1 C (-15.0 F)
1911
-28.9 C (-20.0 F)
1912
-35.0 C (-31.0 F)
1913
-20.6 C (-5.1 F)
1914
-25.6 C (-14.1 F)
1915
-31.1 C (-24.0 F)
1916
-30.0 C (-22.0 F)
1917
-33.3 C (-27.9 F)
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
-13.3 C (8.1 F)
1933
n/a
1934
n/a
1935
-25.6 C (-14.1 F)
1936
16.7 C (62.1 F)
1937
n/a
1938
-6.7 C (19.9 F)
1939
n/a
1940
9.4 C (48.9 F)
1941
-17.8 C (0.0 F)
1942
-23.3 C (-9.9 F)
1943
-27.2 C (-17.0 F)
1944
-23.3 C (-9.9 F)
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
-22.8 C (-9.0 F)
1964
-25.6 C (-14.1 F)
1965
-25.0 C (-13.0 F)
1966
-27.8 C (-18.0 F)
1967
-24.4 C (-11.9 F)
1968
-27.2 C (-17.0 F)
1969
-24.4 C (-11.9 F)
1970
-24.4 C (-11.9 F)
1971
-25.6 C (-14.1 F)
1972
-25.0 C (-13.0 F)
1973
-22.8 C (-9.0 F)
1974
-29.4 C (-20.9 F)
1975
-25.6 C (-14.1 F)
1976
-24.4 C (-11.9 F)
1977
-25.0 C (-13.0 F)
1978
-25.0 C (-13.0 F)
1979
-26.7 C (-16.1 F)
1980
-23.3 C (-9.9 F)
1981
-27.8 C (-18.0 F)
1982
-29.4 C (-20.9 F)
1983
-28.9 C (-20.0 F)
1984
-23.3 C (-9.9 F)
1985
-25.6 C (-14.1 F)
1986
-22.2 C (-8.0 F)
1987
-15.0 C (5.0 F)
1988
-23.3 C (-9.9 F)
1989
-33.3 C (-27.9 F)
1990
-25.6 C (-14.1 F)
1991
-22.8 C (-9.0 F)
1992
-19.4 C (-2.9 F)
1993
-24.4 C (-11.9 F)
1994
-27.2 C (-17.0 F)
1995
-22.2 C (-8.0 F)
1996
-28.9 C (-20.0 F)
1997
-24.4 C (-11.9 F)
1998
-26.1 C (-15.0 F)
1999
-21.1 C (-6.0 F)
2000
-22.2 C (-8.0 F)
2001
-22.8 C (-9.0 F)
2002
-21.7 C (-7.1 F)
2003
-25.0 C (-13.0 F)
2004
-25.0 C (-13.0 F)
2005
-23.9 C (-11.0 F)
2006
-21.1 C (-6.0 F)
2007
-22.8 C (-9.0 F)
2008
-21.7 C (-7.1 F)
Wettest day (Rx1day)
The wettest day of the year at Aurora, 1894 to 2008. The record is 162.6 mm (6.4 in) in 1980, marked on the chart; the median year is 59.7 mm (2.4 in).
Wettest day (Rx1day) at Aurora by year
Year
Wettest day (Rx1day)
1894
2.0 mm (0.08 in)
1895
39.6 mm (1.6 in)
1896
112.8 mm (4.4 in)
1897
47.5 mm (1.9 in)
1898
85.1 mm (3.4 in)
1899
38.1 mm (1.5 in)
1900
59.7 mm (2.4 in)
1901
53.1 mm (2.1 in)
1902
91.4 mm (3.6 in)
1903
64.3 mm (2.5 in)
1904
78.7 mm (3.1 in)
1905
77.5 mm (3.1 in)
1906
48.3 mm (1.9 in)
1907
62.2 mm (2.4 in)
1908
63.5 mm (2.5 in)
1909
31.8 mm (1.3 in)
1910
88.9 mm (3.5 in)
1911
68.8 mm (2.7 in)
1912
47.2 mm (1.9 in)
1913
58.7 mm (2.3 in)
1914
101.9 mm (4.0 in)
1915
83.3 mm (3.3 in)
1916
72.4 mm (2.9 in)
1917
49.8 mm (2.0 in)
1922
21.8 mm (0.9 in)
1923
93.2 mm (3.7 in)
1924
60.2 mm (2.4 in)
1925
35.6 mm (1.4 in)
1926
49.3 mm (1.9 in)
1927
40.6 mm (1.6 in)
1928
71.1 mm (2.8 in)
1929
71.1 mm (2.8 in)
1930
79.0 mm (3.1 in)
1931
46.2 mm (1.8 in)
1932
66.8 mm (2.6 in)
1933
47.2 mm (1.9 in)
1934
23.4 mm (0.9 in)
1935
52.6 mm (2.1 in)
1936
71.6 mm (2.8 in)
1937
44.5 mm (1.8 in)
1938
38.9 mm (1.5 in)
1939
96.5 mm (3.8 in)
1940
32.5 mm (1.3 in)
1941
48.8 mm (1.9 in)
1942
94.0 mm (3.7 in)
1943
53.3 mm (2.1 in)
1944
47.8 mm (1.9 in)
1945
48.3 mm (1.9 in)
1946
50.8 mm (2.0 in)
1947
40.6 mm (1.6 in)
1948
82.0 mm (3.2 in)
1949
47.8 mm (1.9 in)
1950
146.1 mm (5.8 in)
1951
34.3 mm (1.4 in)
1952
37.1 mm (1.5 in)
1953
44.5 mm (1.8 in)
1954
88.1 mm (3.5 in)
1955
43.4 mm (1.7 in)
1956
41.9 mm (1.6 in)
1957
109.2 mm (4.3 in)
1958
37.6 mm (1.5 in)
1959
73.7 mm (2.9 in)
1960
63.2 mm (2.5 in)
1961
61.5 mm (2.4 in)
1962
42.9 mm (1.7 in)
1963
90.2 mm (3.6 in)
1964
54.4 mm (2.1 in)
1965
48.8 mm (1.9 in)
1966
35.6 mm (1.4 in)
1967
76.2 mm (3.0 in)
1968
111.0 mm (4.4 in)
1969
45.7 mm (1.8 in)
1970
66.0 mm (2.6 in)
1971
44.7 mm (1.8 in)
1972
45.7 mm (1.8 in)
1973
53.3 mm (2.1 in)
1974
55.4 mm (2.2 in)
1975
63.8 mm (2.5 in)
1976
39.6 mm (1.6 in)
1977
75.2 mm (3.0 in)
1978
44.7 mm (1.8 in)
1979
59.2 mm (2.3 in)
1980
162.6 mm (6.4 in)
1981
74.4 mm (2.9 in)
1982
94.0 mm (3.7 in)
1983
62.2 mm (2.4 in)
1984
76.2 mm (3.0 in)
1985
85.6 mm (3.4 in)
1986
57.2 mm (2.3 in)
1987
65.3 mm (2.6 in)
1988
95.3 mm (3.8 in)
1989
92.7 mm (3.6 in)
1990
99.1 mm (3.9 in)
1991
71.6 mm (2.8 in)
1992
65.0 mm (2.6 in)
1993
47.0 mm (1.9 in)
1994
65.0 mm (2.6 in)
1995
40.4 mm (1.6 in)
1996
58.7 mm (2.3 in)
1997
58.4 mm (2.3 in)
1998
58.4 mm (2.3 in)
1999
47.0 mm (1.9 in)
2000
58.7 mm (2.3 in)
2001
67.8 mm (2.7 in)
2002
95.5 mm (3.8 in)
2003
94.7 mm (3.7 in)
2004
76.5 mm (3.0 in)
2005
86.4 mm (3.4 in)
2006
78.7 mm (3.1 in)
2007
105.2 mm (4.1 in)
2008
38.1 mm (1.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Aurora, 1894 to 2008. The record is 250.7 mm (9.9 in) in 1980, marked on the chart; the median year is 87.7 mm (3.5 in).
Wettest five days (Rx5day) at Aurora by year
Year
Wettest five days (Rx5day)
1894
2.0 mm (0.08 in)
1895
36.8 mm (1.4 in)
1896
119.9 mm (4.7 in)
1897
96.8 mm (3.8 in)
1898
147.1 mm (5.8 in)
1899
49.5 mm (1.9 in)
1900
87.7 mm (3.5 in)
1901
109.0 mm (4.3 in)
1902
112.6 mm (4.4 in)
1903
128.3 mm (5.1 in)
1904
78.7 mm (3.1 in)
1905
83.9 mm (3.3 in)
1906
92.7 mm (3.6 in)
1907
101.5 mm (4.0 in)
1908
78.2 mm (3.1 in)
1909
83.0 mm (3.3 in)
1910
102.9 mm (4.1 in)
1911
76.7 mm (3.0 in)
1912
58.9 mm (2.3 in)
1913
86.6 mm (3.4 in)
1914
121.9 mm (4.8 in)
1915
147.9 mm (5.8 in)
1916
84.3 mm (3.3 in)
1917
93.2 mm (3.7 in)
1922
40.8 mm (1.6 in)
1923
138.5 mm (5.5 in)
1924
99.8 mm (3.9 in)
1925
50.8 mm (2.0 in)
1926
72.9 mm (2.9 in)
1927
56.2 mm (2.2 in)
1928
91.4 mm (3.6 in)
1929
75.2 mm (3.0 in)
1930
176.8 mm (7.0 in)
1931
99.8 mm (3.9 in)
1932
121.8 mm (4.8 in)
1933
68.1 mm (2.7 in)
1934
51.6 mm (2.0 in)
1935
87.5 mm (3.4 in)
1936
72.9 mm (2.9 in)
1937
74.4 mm (2.9 in)
1938
67.3 mm (2.6 in)
1939
119.9 mm (4.7 in)
1940
41.9 mm (1.6 in)
1941
72.9 mm (2.9 in)
1942
119.8 mm (4.7 in)
1943
68.5 mm (2.7 in)
1944
74.0 mm (2.9 in)
1945
79.6 mm (3.1 in)
1946
93.5 mm (3.7 in)
1947
62.8 mm (2.5 in)
1948
141.2 mm (5.6 in)
1949
62.5 mm (2.5 in)
1950
161.8 mm (6.4 in)
1951
57.6 mm (2.3 in)
1952
70.1 mm (2.8 in)
1953
44.5 mm (1.8 in)
1954
103.4 mm (4.1 in)
1955
72.7 mm (2.9 in)
1956
42.4 mm (1.7 in)
1957
205.0 mm (8.1 in)
1958
69.9 mm (2.8 in)
1959
84.4 mm (3.3 in)
1960
114.6 mm (4.5 in)
1961
64.0 mm (2.5 in)
1962
98.6 mm (3.9 in)
1963
112.0 mm (4.4 in)
1964
96.3 mm (3.8 in)
1965
77.1 mm (3.0 in)
1966
56.3 mm (2.2 in)
1967
103.9 mm (4.1 in)
1968
135.6 mm (5.3 in)
1969
64.5 mm (2.5 in)
1970
75.7 mm (3.0 in)
1971
83.1 mm (3.3 in)
1972
58.2 mm (2.3 in)
1973
93.7 mm (3.7 in)
1974
100.6 mm (4.0 in)
1975
100.2 mm (3.9 in)
1976
46.7 mm (1.8 in)
1977
98.2 mm (3.9 in)
1978
78.5 mm (3.1 in)
1979
108.7 mm (4.3 in)
1980
250.7 mm (9.9 in)
1981
99.4 mm (3.9 in)
1982
112.5 mm (4.4 in)
1983
112.7 mm (4.4 in)
1984
125.2 mm (4.9 in)
1985
110.0 mm (4.3 in)
1986
80.8 mm (3.2 in)
1987
117.7 mm (4.6 in)
1988
97.9 mm (3.9 in)
1989
116.5 mm (4.6 in)
1990
119.0 mm (4.7 in)
1991
128.7 mm (5.1 in)
1992
86.6 mm (3.4 in)
1993
70.4 mm (2.8 in)
1994
83.8 mm (3.3 in)
1995
81.6 mm (3.2 in)
1996
80.0 mm (3.1 in)
1997
106.7 mm (4.2 in)
1998
80.3 mm (3.2 in)
1999
87.6 mm (3.4 in)
2000
61.5 mm (2.4 in)
2001
105.7 mm (4.2 in)
2002
103.9 mm (4.1 in)
2003
115.0 mm (4.5 in)
2004
98.4 mm (3.9 in)
2005
87.9 mm (3.5 in)
2006
92.4 mm (3.6 in)
2007
136.2 mm (5.4 in)
2008
80.0 mm (3.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Aurora, 1894 to 2008. The record is 74 days in 1937, marked on the chart; the median year is 34 days.
Longest dry spell (CDD) at Aurora by year
Year
Longest dry spell (CDD)
1894
39 days
1895
38 days
1896
31 days
1897
28 days
1898
41 days
1899
28 days
1900
37 days
1901
33 days
1902
24 days
1903
31 days
1904
51 days
1905
31 days
1906
66 days
1907
39 days
1908
40 days
1909
33 days
1910
32 days
1911
30 days
1912
19 days
1913
28 days
1914
17 days
1915
34 days
1916
23 days
1917
20 days
1922
55 days
1923
39 days
1924
39 days
1925
52 days
1926
23 days
1927
43 days
1928
33 days
1929
32 days
1930
29 days
1931
22 days
1932
24 days
1933
36 days
1934
43 days
1935
24 days
1936
49 days
1937
74 days
1938
27 days
1939
74 days
1940
21 days
1941
33 days
1942
37 days
1943
37 days
1944
30 days
1945
61 days
1946
47 days
1947
23 days
1948
26 days
1949
34 days
1950
41 days
1951
35 days
1952
63 days
1953
43 days
1954
39 days
1955
28 days
1956
39 days
1957
42 days
1958
47 days
1959
29 days
1960
22 days
1961
25 days
1962
26 days
1963
35 days
1964
34 days
1965
23 days
1966
64 days
1967
44 days
1968
24 days
1969
32 days
1970
44 days
1971
27 days
1972
40 days
1973
39 days
1974
45 days
1975
23 days
1976
53 days
1977
27 days
1978
31 days
1979
38 days
1980
40 days
1981
31 days
1982
26 days
1983
19 days
1984
31 days
1985
24 days
1986
34 days
1987
55 days
1988
35 days
1989
45 days
1990
24 days
1991
34 days
1992
30 days
1993
22 days
1994
44 days
1995
20 days
1996
57 days
1997
33 days
1998
49 days
1999
45 days
2000
28 days
2001
38 days
2002
61 days
2003
60 days
2004
32 days
2005
28 days
2006
39 days
2007
43 days
2008
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
47 years with a frost
Across 47 years with a frost, the median last spring frost at Aurora falls on 23 April and the median first autumn frost on 12 October, which leaves a median of 171 days between them.
Fitted over all years, the growing season changes by +0.6 days per decade at this station.
Frost dates and growing season at Aurora
Measure
Median, all years
Earliest period
Recent period (1976 to 2007)
Recent against earliest
Fitted trend
Last spring frost
23 April
n/a
25 April
n/a
-0.6 days per decade
First autumn frost
12 October
n/a
10 October
n/a
0.0 days per decade
Growing days
171 days
n/a
168 days
n/a
+0.6 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
85 years, 1899 to 2007
A day with at least 61.3 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 145.7 mm (5.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Aurora: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
61.3 mm (2.4 in)
5 years
82.9 mm (3.3 in)
10 years
97.5 mm (3.8 in)
25 years
116.6 mm (4.6 in)
50 years
131.0 mm (5.2 in)
100 years
145.7 mm (5.7 in)
Longer than the 85 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, 85 years of values from 1899 to 2007.
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: 162.6 mm (6.4 in) in 1980; 146.1 mm (5.8 in) in 1950; 111.0 mm (4.4 in) in 1968.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Aurora, at 1975. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1975 ran 0.5 C (1.0 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Aurora, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1975
-0.5
-1.0
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Aurora standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Aurora 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.