Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Asosan. 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 Asosan, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.6 C (56.5 F)
-14.9 C (5.2 F)
n/a
n/a
Feb
16.6 C (61.9 F)
-15.9 C (3.4 F)
n/a
n/a
Mar
19.3 C (66.7 F)
-13.1 C (8.4 F)
n/a
n/a
Apr
23.8 C (74.8 F)
-7.6 C (18.3 F)
n/a
n/a
May
27.2 C (81.0 F)
-0.3 C (31.5 F)
n/a
n/a
Jun
26.9 C (80.4 F)
5.5 C (41.9 F)
n/a
n/a
Jul
31.1 C (88.0 F)
9.8 C (49.6 F)
n/a
n/a
Aug
29.8 C (85.6 F)
12.1 C (53.8 F)
n/a
n/a
Sep
28.0 C (82.4 F)
4.5 C (40.1 F)
n/a
n/a
Oct
25.1 C (77.2 F)
-1.5 C (29.3 F)
n/a
n/a
Nov
20.4 C (68.7 F)
-7.7 C (18.1 F)
n/a
n/a
Dec
15.8 C (60.4 F)
-13.0 C (8.6 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Asosan still stand. 1969 holds the most, with 43.
Standing records at Asosan by the year they were set
Year set
Standing records
1951
22
1952
18
1953
25
1954
28
1955
18
1956
32
1957
32
1958
32
1959
27
1960
18
1961
20
1962
13
1963
26
1964
21
1965
15
1966
33
1967
31
1968
26
1969
43
1970
29
1971
20
1972
31
1973
24
1974
17
1975
12
1976
37
1977
34
1978
20
1979
25
1980
37
1981
35
1982
22
1983
20
1984
27
1985
18
1986
17
1987
35
1988
17
1989
37
1991
1
1992
2
1993
1
1994
27
1995
8
1996
12
1997
16
1998
18
1999
14
2000
12
2001
10
2002
23
2003
24
2004
23
2005
23
2006
15
2007
23
2008
19
2009
23
2010
28
2011
25
2012
5
2013
39
2014
20
2015
17
2016
21
2017
21
All-Time Record Progression
2 new records
2 all-time records were set at Asosan between 26 February 1981 and 15 July 1994. Each dot is a new record.
When Asosan set new all-time records
Date
Kind
Detail
1981-02-26
Record low minimum temperature
Record low minimum temperature -15.9 C (3.4 F)
1994-07-15
Record high maximum temperature
Record high maximum temperature 31.1 C (88.0 F)
Wettest Day of Each Month
Jun: 432.3 mm (17.0 in)
The wettest day on record for each calendar month at Asosan. The most was 432.3 mm (17.0 in) on 26 June 1953.
Record daily precipitation for each month at Asosan
Month
Record daily precipitation (mm)
Date
Jan
90.9 mm (3.6 in)
12 January 2008
Feb
106.0 mm (4.2 in)
23 February 1979
Mar
109.0 mm (4.3 in)
13 March 1989
Apr
178.5 mm (7.0 in)
22 April 1958
May
263.9 mm (10.4 in)
23 May 2010
Jun
432.3 mm (17.0 in)
26 June 1953
Jul
407.5 mm (16.0 in)
24 July 1982
Aug
406.4 mm (16.0 in)
9 August 1963
Sep
271.0 mm (10.7 in)
6 September 2005
Oct
136.4 mm (5.4 in)
14 October 1951
Nov
117.1 mm (4.6 in)
6 November 2003
Dec
124.0 mm (4.9 in)
9 December 1994
Period of Record Coverage
1951 to 2017
Complete yearUnder 90 percent of days
67 years of record at Asosan, 1951 to 2017. 15 years have data for under 90 percent of days and are left out of rankings: 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1999 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 39 complete years at Asosan, 1951 to 1989. Blue stripes are years cooler than the station's own mean of 9.7 C (49.4 F); red stripes are warmer. The coolest year was 1965, at 9.0 C (48.2 F), and the warmest was 1959, at 10.5 C (50.9 F). The strongest colour marks a difference of 0.9 C (1.6 F).
Annual mean temperature at Asosan as warming stripes, 1951 to 1989
Year
Annual mean temperature
Difference from the station mean
1951
9.6 C
-0.10 C
1952
10.0 C
+0.28 C
1953
9.9 C
+0.24 C
1954
10.2 C
+0.56 C
1955
10.2 C
+0.48 C
1956
9.4 C
-0.26 C
1957
9.4 C
-0.24 C
1958
10.2 C
+0.52 C
1959
10.5 C
+0.81 C
1960
10.1 C
+0.46 C
1961
10.3 C
+0.64 C
1962
9.4 C
-0.29 C
1963
9.2 C
-0.51 C
1964
10.3 C
+0.60 C
1965
9.0 C
-0.67 C
1966
9.6 C
-0.06 C
1967
9.8 C
+0.13 C
1968
9.3 C
-0.42 C
1969
9.6 C
-0.11 C
1970
9.3 C
-0.40 C
1971
9.5 C
-0.22 C
1972
9.6 C
-0.10 C
1973
9.6 C
-0.10 C
1974
9.4 C
-0.24 C
1975
9.6 C
-0.06 C
1976
9.1 C
-0.58 C
1977
9.9 C
+0.20 C
1978
10.0 C
+0.29 C
1979
10.3 C
+0.58 C
1980
9.1 C
-0.58 C
1981
9.0 C
-0.66 C
1982
9.5 C
-0.15 C
1983
9.6 C
-0.10 C
1984
9.1 C
-0.60 C
1985
9.7 C
+0.06 C
1986
9.3 C
-0.33 C
1987
10.1 C
+0.44 C
1988
9.5 C
-0.19 C
1989
10.2 C
+0.54 C
The fitted trend in annual mean temperature here over 1951 to 1989 is -0.09 C (-0.21 to 0.02) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.17 F (-0.38 to 0.04) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Asosan
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.09 C (-0.21 to 0.02) per decade
-0.17 F (-0.38 to 0.04) per decade
1951 to 1989
39
Not clearly different from zero
Mean daily maximum
-0.17 C (-0.31 to -0.04) per decade
-0.3 F (-0.6 to -0.1) per decade
1951 to 1989
39
Fall
Mean daily minimum
-0.02 C (-0.13 to 0.09) per decade
-0.03 F (-0.23 to 0.17) per decade
1951 to 1989
39
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
1951 to 2017
Yearly extremes at Asosan: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
31.1 C (88.0 F)
1994
27.6 C (81.7 F)
67
Coldest night (TNn)
-15.9 C (3.4 F)
1981
-11.5 C (11.3 F)
67
Wettest day (Rx1day)
432.3 mm (17.0 in)
1953
185.9 mm (7.3 in)
67
Wettest five days (Rx5day)
779.5 mm (30.7 in)
1987
378.0 mm (14.9 in)
59
Longest dry spell (CDD)
27 days
1977
14 days
61
Hottest day (TXx)
The hottest day of the year at Asosan, 1951 to 2017. The record is 31.1 C (88.0 F) in 1994, marked on the chart; the median year is 27.6 C (81.7 F).
Hottest day (TXx) at Asosan by year
Year
Hottest day (TXx)
1951
28.4 C (83.1 F)
1952
27.9 C (82.2 F)
1953
28.7 C (83.7 F)
1954
27.7 C (81.9 F)
1955
27.1 C (80.8 F)
1956
29.7 C (85.5 F)
1957
26.5 C (79.7 F)
1958
28.1 C (82.6 F)
1959
28.1 C (82.6 F)
1960
27.4 C (81.3 F)
1961
27.7 C (81.9 F)
1962
26.4 C (79.5 F)
1963
26.8 C (80.2 F)
1964
27.6 C (81.7 F)
1965
26.6 C (79.9 F)
1966
27.3 C (81.1 F)
1967
27.6 C (81.7 F)
1968
27.3 C (81.1 F)
1969
27.7 C (81.9 F)
1970
28.1 C (82.6 F)
1971
26.8 C (80.2 F)
1972
27.7 C (81.9 F)
1973
27.5 C (81.5 F)
1974
26.4 C (79.5 F)
1975
25.5 C (77.9 F)
1976
25.5 C (77.9 F)
1977
27.3 C (81.1 F)
1978
27.7 C (81.9 F)
1979
27.0 C (80.6 F)
1980
26.3 C (79.3 F)
1981
26.5 C (79.7 F)
1982
25.0 C (77.0 F)
1983
28.4 C (83.1 F)
1984
28.3 C (82.9 F)
1985
26.7 C (80.1 F)
1986
27.6 C (81.7 F)
1987
27.0 C (80.6 F)
1988
27.9 C (82.2 F)
1989
27.0 C (80.6 F)
1990
26.2 C (79.2 F)
1991
23.4 C (74.1 F)
1992
22.5 C (72.5 F)
1993
21.0 C (69.8 F)
1994
31.1 C (88.0 F)
1995
27.9 C (82.2 F)
1996
27.7 C (81.9 F)
1997
26.4 C (79.5 F)
1998
27.0 C (80.6 F)
1999
26.0 C (78.8 F)
2000
27.6 C (81.7 F)
2001
28.6 C (83.5 F)
2002
28.0 C (82.4 F)
2003
28.0 C (82.4 F)
2004
27.8 C (82.0 F)
2005
28.6 C (83.5 F)
2006
28.6 C (83.5 F)
2007
28.7 C (83.7 F)
2008
28.4 C (83.1 F)
2009
27.4 C (81.3 F)
2010
29.2 C (84.6 F)
2011
27.0 C (80.6 F)
2012
28.5 C (83.3 F)
2013
29.7 C (85.5 F)
2014
27.9 C (82.2 F)
2015
29.3 C (84.7 F)
2016
29.8 C (85.6 F)
2017
29.4 C (84.9 F)
Coldest night (TNn)
The coldest night of the year at Asosan, 1951 to 2017. The record is -15.9 C (3.4 F) in 1981, marked on the chart; the median year is -11.5 C (11.3 F).
Coldest night (TNn) at Asosan by year
Year
Coldest night (TNn)
1951
-11.4 C (11.5 F)
1952
-12.3 C (9.9 F)
1953
-11.1 C (12.0 F)
1954
-11.1 C (12.0 F)
1955
-13.6 C (7.5 F)
1956
-11.5 C (11.3 F)
1957
-12.8 C (9.0 F)
1958
-11.9 C (10.6 F)
1959
-12.6 C (9.3 F)
1960
-13.0 C (8.6 F)
1961
-11.2 C (11.8 F)
1962
-9.2 C (15.4 F)
1963
-13.0 C (8.6 F)
1964
-11.1 C (12.0 F)
1965
-12.0 C (10.4 F)
1966
-11.5 C (11.3 F)
1967
-14.9 C (5.2 F)
1968
-12.5 C (9.5 F)
1969
-11.6 C (11.1 F)
1970
-13.0 C (8.6 F)
1971
-12.7 C (9.1 F)
1972
-10.0 C (14.0 F)
1973
-12.0 C (10.4 F)
1974
-13.5 C (7.7 F)
1975
-11.0 C (12.2 F)
1976
-12.6 C (9.3 F)
1977
-15.3 C (4.5 F)
1978
-11.2 C (11.8 F)
1979
-10.6 C (12.9 F)
1980
-13.0 C (8.6 F)
1981
-15.9 C (3.4 F)
1982
-12.8 C (9.0 F)
1983
-12.5 C (9.5 F)
1984
-14.2 C (6.4 F)
1985
-14.2 C (6.4 F)
1986
-12.6 C (9.3 F)
1987
-10.8 C (12.6 F)
1988
-11.8 C (10.8 F)
1989
-9.9 C (14.2 F)
1990
11.3 C (52.3 F)
1991
17.7 C (63.9 F)
1992
14.9 C (58.8 F)
1993
17.4 C (63.3 F)
1994
-7.5 C (18.5 F)
1995
-10.2 C (13.6 F)
1996
-12.5 C (9.5 F)
1997
-9.8 C (14.4 F)
1998
-14.2 C (6.4 F)
1999
-10.6 C (12.9 F)
2000
-11.0 C (12.2 F)
2001
-12.1 C (10.2 F)
2002
-10.9 C (12.4 F)
2003
-10.7 C (12.7 F)
2004
-12.8 C (9.0 F)
2005
-12.5 C (9.5 F)
2006
-10.3 C (13.5 F)
2007
-10.1 C (13.8 F)
2008
-10.2 C (13.6 F)
2009
-11.4 C (11.5 F)
2010
-10.0 C (14.0 F)
2011
-14.0 C (6.8 F)
2012
-14.0 C (6.8 F)
2013
-11.3 C (11.7 F)
2014
-10.2 C (13.6 F)
2015
-11.3 C (11.7 F)
2016
-14.4 C (6.1 F)
2017
-9.6 C (14.7 F)
Wettest day (Rx1day)
The wettest day of the year at Asosan, 1951 to 2017. The record is 432.3 mm (17.0 in) in 1953, marked on the chart; the median year is 185.9 mm (7.3 in).
Wettest day (Rx1day) at Asosan by year
Year
Wettest day (Rx1day)
1951
216.3 mm (8.5 in)
1952
139.8 mm (5.5 in)
1953
432.3 mm (17.0 in)
1954
200.6 mm (7.9 in)
1955
235.8 mm (9.3 in)
1956
166.2 mm (6.5 in)
1957
225.1 mm (8.9 in)
1958
203.3 mm (8.0 in)
1959
95.7 mm (3.8 in)
1960
254.2 mm (10.0 in)
1961
242.2 mm (9.5 in)
1962
264.4 mm (10.4 in)
1963
406.4 mm (16.0 in)
1964
218.5 mm (8.6 in)
1965
249.0 mm (9.8 in)
1966
108.4 mm (4.3 in)
1967
140.2 mm (5.5 in)
1968
181.0 mm (7.1 in)
1969
177.5 mm (7.0 in)
1970
185.5 mm (7.3 in)
1971
180.5 mm (7.1 in)
1972
163.0 mm (6.4 in)
1973
172.5 mm (6.8 in)
1974
194.0 mm (7.6 in)
1975
290.0 mm (11.4 in)
1976
116.0 mm (4.6 in)
1977
169.0 mm (6.7 in)
1978
162.5 mm (6.4 in)
1979
207.5 mm (8.2 in)
1980
295.0 mm (11.6 in)
1981
133.0 mm (5.2 in)
1982
407.5 mm (16.0 in)
1983
149.5 mm (5.9 in)
1984
111.0 mm (4.4 in)
1985
260.0 mm (10.2 in)
1986
149.5 mm (5.9 in)
1987
235.0 mm (9.3 in)
1988
176.5 mm (6.9 in)
1989
164.0 mm (6.5 in)
1990
27.9 mm (1.1 in)
1991
126.0 mm (5.0 in)
1992
85.1 mm (3.4 in)
1993
198.9 mm (7.8 in)
1994
124.0 mm (4.9 in)
1995
195.1 mm (7.7 in)
1996
246.9 mm (9.7 in)
1997
274.1 mm (10.8 in)
1998
151.9 mm (6.0 in)
1999
194.1 mm (7.6 in)
2000
176.0 mm (6.9 in)
2001
148.1 mm (5.8 in)
2002
104.9 mm (4.1 in)
2003
190.0 mm (7.5 in)
2004
173.0 mm (6.8 in)
2005
271.0 mm (10.7 in)
2006
284.0 mm (11.2 in)
2007
295.9 mm (11.6 in)
2008
127.0 mm (5.0 in)
2009
181.1 mm (7.1 in)
2010
263.9 mm (10.4 in)
2011
242.1 mm (9.5 in)
2012
215.9 mm (8.5 in)
2013
185.9 mm (7.3 in)
2014
117.1 mm (4.6 in)
2015
208.0 mm (8.2 in)
2016
200.9 mm (7.9 in)
2017
161.0 mm (6.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Asosan, 1951 to 2017. The record is 779.5 mm (30.7 in) in 1987, marked on the chart; the median year is 378.0 mm (14.9 in).
Wettest five days (Rx5day) at Asosan by year
Year
Wettest five days (Rx5day)
1951
550.0 mm (21.7 in)
1952
275.8 mm (10.9 in)
1953
770.2 mm (30.3 in)
1954
435.5 mm (17.1 in)
1955
334.9 mm (13.2 in)
1956
329.7 mm (13.0 in)
1957
555.8 mm (21.9 in)
1958
364.0 mm (14.3 in)
1959
308.3 mm (12.1 in)
1960
368.4 mm (14.5 in)
1961
527.0 mm (20.7 in)
1962
520.9 mm (20.5 in)
1963
776.8 mm (30.6 in)
1964
455.3 mm (17.9 in)
1965
723.2 mm (28.5 in)
1966
259.8 mm (10.2 in)
1967
349.2 mm (13.7 in)
1968
537.5 mm (21.2 in)
1969
556.5 mm (21.9 in)
1970
291.5 mm (11.5 in)
1971
568.0 mm (22.4 in)
1972
379.5 mm (14.9 in)
1973
491.0 mm (19.3 in)
1974
552.0 mm (21.7 in)
1975
643.5 mm (25.3 in)
1976
308.0 mm (12.1 in)
1977
428.0 mm (16.9 in)
1978
214.5 mm (8.4 in)
1979
716.5 mm (28.2 in)
1980
619.5 mm (24.4 in)
1981
313.5 mm (12.3 in)
1982
680.0 mm (26.8 in)
1983
249.5 mm (9.8 in)
1984
248.0 mm (9.8 in)
1985
429.0 mm (16.9 in)
1986
372.5 mm (14.7 in)
1987
779.5 mm (30.7 in)
1988
378.0 mm (14.9 in)
1989
312.5 mm (12.3 in)
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1994
n/a
1995
n/a
1996
459.7 mm (18.1 in)
1997
n/a
1998
n/a
1999
352.3 mm (13.9 in)
2000
162.8 mm (6.4 in)
2001
375.0 mm (14.8 in)
2002
26.4 mm (1.0 in)
2003
241.0 mm (9.5 in)
2004
294.9 mm (11.6 in)
2005
510.0 mm (20.1 in)
2006
618.4 mm (24.3 in)
2007
677.5 mm (26.7 in)
2008
365.0 mm (14.4 in)
2009
372.7 mm (14.7 in)
2010
364.7 mm (14.4 in)
2011
546.2 mm (21.5 in)
2012
329.9 mm (13.0 in)
2013
340.9 mm (13.4 in)
2014
221.5 mm (8.7 in)
2015
362.7 mm (14.3 in)
2016
628.7 mm (24.8 in)
2017
439.9 mm (17.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Asosan, 1951 to 2017. The record is 27 days in 1977, marked on the chart; the median year is 14 days.
Longest dry spell (CDD) at Asosan by year
Year
Longest dry spell (CDD)
1951
13 days
1952
11 days
1953
11 days
1954
23 days
1955
17 days
1956
23 days
1957
11 days
1958
13 days
1959
14 days
1960
11 days
1961
13 days
1962
18 days
1963
15 days
1964
15 days
1965
17 days
1966
8 days
1967
14 days
1968
13 days
1969
18 days
1970
14 days
1971
18 days
1972
14 days
1973
13 days
1974
20 days
1975
15 days
1976
10 days
1977
27 days
1978
14 days
1979
15 days
1980
25 days
1981
13 days
1982
11 days
1983
20 days
1984
25 days
1985
13 days
1986
23 days
1987
13 days
1988
14 days
1989
11 days
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1994
2 days
1995
1 day
1996
1 day
1997
1 day
1998
2 days
1999
9 days
2000
n/a
2001
n/a
2002
4 days
2003
8 days
2004
15 days
2005
19 days
2006
16 days
2007
25 days
2008
18 days
2009
16 days
2010
12 days
2011
23 days
2012
16 days
2013
18 days
2014
10 days
2015
10 days
2016
13 days
2017
10 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
39 years with a frost
Across 39 years with a frost, the median last spring frost at Asosan falls on 13 April and the median first autumn frost on 12 November, which leaves a median of 212 days between them.
Fitted over all years, the growing season changes by -0.3 days per decade at this station.
Frost dates and growing season at Asosan
Measure
Median, all years
Earliest period
Recent period (1960 to 1989)
Recent against earliest
Fitted trend
Last spring frost
13 April
n/a
11 April
n/a
-1.6 days per decade
First autumn frost
12 November
n/a
12 November
n/a
-1.9 days per decade
Growing days
212 days
n/a
215 days
n/a
-0.3 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
50 years, 1951 to 2014
A day with at least 195.2 mm (7.7 in) of rain is expected about once in 2 years. A day with at least 453.2 mm (17.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Asosan: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
195.2 mm (7.7 in)
5 years
261.3 mm (10.3 in)
10 years
306.2 mm (12.1 in)
25 years
364.4 mm (14.3 in)
50 years
408.5 mm (16.1 in)
100 years
453.2 mm (17.8 in)
Longer than the 50 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, 50 years of values from 1951 to 2014.
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: 432.3 mm (17.0 in) in 1953; 407.5 mm (16.0 in) in 1982; 406.4 mm (16.0 in) in 1963.
Download the Data
Data for Asosan standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Asosan 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.