Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Kotka Sunila. 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 Kotka Sunila, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
7.5 C (45.5 F)
-36.7 C (-34.1 F)
n/a
n/a
Feb
9.4 C (48.9 F)
-34.8 C (-30.6 F)
n/a
n/a
Mar
12.5 C (54.5 F)
-31.9 C (-25.4 F)
n/a
n/a
Apr
21.3 C (70.3 F)
-20.8 C (-5.4 F)
n/a
n/a
May
27.1 C (80.8 F)
-6.6 C (20.1 F)
n/a
n/a
Jun
30.7 C (87.3 F)
-1.0 C (30.2 F)
n/a
n/a
Jul
32.3 C (90.1 F)
2.3 C (36.1 F)
n/a
n/a
Aug
30.0 C (86.0 F)
-1.0 C (30.2 F)
n/a
n/a
Sep
25.0 C (77.0 F)
-5.4 C (22.3 F)
n/a
n/a
Oct
16.7 C (62.1 F)
-12.0 C (10.4 F)
n/a
n/a
Nov
11.0 C (51.8 F)
-20.9 C (-5.6 F)
n/a
n/a
Dec
6.5 C (43.7 F)
-31.1 C (-24.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Kotka Sunila still stand. 1965 holds the most, with 79.
Standing records at Kotka Sunila by the year they were set
Year set
Standing records
1959
32
1960
34
1961
52
1962
41
1963
60
1964
40
1965
79
1966
61
1967
65
1968
49
1969
31
1970
29
1971
32
1972
54
1973
57
1974
37
1975
47
1976
38
1977
48
1978
52
1979
15
1980
36
1981
26
1982
43
1983
34
1984
24
1985
32
1986
31
1987
42
1988
46
1989
52
1990
54
1991
28
1992
49
1993
14
Wettest Day of Each Month
Aug: 69.7 mm (2.7 in)
The wettest day on record for each calendar month at Kotka Sunila. The most was 69.7 mm (2.7 in) on 7 August 1978.
Record daily precipitation for each month at Kotka Sunila
Month
Record daily precipitation (mm)
Date
Jan
16.0 mm (0.6 in)
23 January 1960
Feb
14.7 mm (0.6 in)
22 February 1977
Mar
23.1 mm (0.9 in)
30 March 1961
Apr
26.3 mm (1.0 in)
27 April 1962
May
25.5 mm (1.0 in)
16 May 1973
Jun
39.0 mm (1.5 in)
25 June 1991
Jul
40.9 mm (1.6 in)
17 July 1980
Aug
69.7 mm (2.7 in)
7 August 1978
Sep
59.8 mm (2.4 in)
12 September 1988
Oct
30.3 mm (1.2 in)
15 October 1972
Nov
22.4 mm (0.9 in)
18 November 1980
Dec
23.0 mm (0.9 in)
13 December 1964
Period of Record Coverage
1959 to 1993
Complete yearUnder 90 percent of days
35 years of record at Kotka Sunila, 1959 to 1993. 2 years have data for under 90 percent of days and are left out of rankings: 1959, 1993.
Cooler than the station meanWarmer than the station mean
One stripe for each of 33 complete years at Kotka Sunila, 1960 to 1992. Blue stripes are years cooler than the station's own mean of 4.1 C (39.4 F); red stripes are warmer. The coolest year was 1987, at 2.4 C (36.3 F), and the warmest was 1989, at 6.5 C (43.8 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Kotka Sunila as warming stripes, 1960 to 1992
Year
Annual mean temperature
Difference from the station mean
1960
4.1 C
-0.04 C
1961
5.8 C
+1.70 C
1962
3.5 C
-0.63 C
1963
2.9 C
-1.19 C
1964
3.8 C
-0.37 C
1965
3.2 C
-0.97 C
1966
2.4 C
-1.69 C
1967
4.1 C
-0.06 C
1968
3.2 C
-0.94 C
1969
2.4 C
-1.68 C
1970
3.0 C
-1.17 C
1971
3.8 C
-0.36 C
1972
4.8 C
+0.66 C
1973
4.0 C
-0.08 C
1974
5.5 C
+1.38 C
1975
5.7 C
+1.54 C
1976
2.6 C
-1.49 C
1977
3.6 C
-0.51 C
1978
2.5 C
-1.66 C
1979
4.2 C
+0.03 C
1980
4.0 C
-0.17 C
1981
4.4 C
+0.27 C
1982
4.7 C
+0.58 C
1983
5.4 C
+1.23 C
1984
5.2 C
+1.10 C
1985
2.6 C
-1.55 C
1986
4.1 C
-0.04 C
1987
2.4 C
-1.73 C
1988
5.1 C
+0.94 C
1989
6.5 C
+2.42 C
1990
5.9 C
+1.79 C
1991
5.5 C
+1.33 C
1992
5.6 C
+1.50 C
The annual mean temperature here has risen by 0.5 C (0.1 to 0.9) per decade over 1960 to 1992. In Fahrenheit: 0.9 F (0.1 to 1.7) per decade. The slope is a straight line fitted to 33 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Kotka Sunila
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.5 C (0.1 to 0.9) per decade
0.9 F (0.1 to 1.7) per decade
1960 to 1992
33
Rise
Mean daily maximum
0.2 C (-0.2 to 0.6) per decade
0.4 F (-0.3 to 1.1) per decade
1960 to 1992
33
Not clearly different from zero
Mean daily minimum
0.8 C (0.3 to 1.3) per decade
1.4 F (0.5 to 2.3) per decade
1960 to 1992
33
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
1959 to 1993
Yearly extremes at Kotka Sunila: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
32.3 C (90.1 F)
1983
27.8 C (82.0 F)
35
Coldest night (TNn)
-36.7 C (-34.1 F)
1987
-27.7 C (-17.9 F)
35
Wettest day (Rx1day)
69.7 mm (2.7 in)
1978
29.4 mm (1.2 in)
35
Wettest five days (Rx5day)
107.8 mm (4.2 in)
1978
48.7 mm (1.9 in)
35
Longest dry spell (CDD)
38 days
1972
21 days
35
Hottest day (TXx)
The hottest day of the year at Kotka Sunila, 1959 to 1993. The record is 32.3 C (90.1 F) in 1983, marked on the chart; the median year is 27.8 C (82.0 F).
Hottest day (TXx) at Kotka Sunila by year
Year
Hottest day (TXx)
1959
28.3 C (82.9 F)
1960
27.5 C (81.5 F)
1961
26.5 C (79.7 F)
1962
23.0 C (73.4 F)
1963
28.0 C (82.4 F)
1964
28.5 C (83.3 F)
1965
27.0 C (80.6 F)
1966
28.4 C (83.1 F)
1967
27.8 C (82.0 F)
1968
25.9 C (78.6 F)
1969
26.8 C (80.2 F)
1970
28.0 C (82.4 F)
1971
26.4 C (79.5 F)
1972
30.7 C (87.3 F)
1973
29.9 C (85.8 F)
1974
25.2 C (77.4 F)
1975
30.0 C (86.0 F)
1976
25.1 C (77.2 F)
1977
28.7 C (83.7 F)
1978
26.7 C (80.1 F)
1979
26.6 C (79.9 F)
1980
29.0 C (84.2 F)
1981
29.6 C (85.3 F)
1982
28.1 C (82.6 F)
1983
32.3 C (90.1 F)
1984
27.1 C (80.8 F)
1985
26.5 C (79.7 F)
1986
28.9 C (84.0 F)
1987
26.3 C (79.3 F)
1988
29.5 C (85.1 F)
1989
28.3 C (82.9 F)
1990
25.5 C (77.9 F)
1991
27.9 C (82.2 F)
1992
27.6 C (81.7 F)
1993
27.1 C (80.8 F)
Coldest night (TNn)
The coldest night of the year at Kotka Sunila, 1959 to 1993. The record is -36.7 C (-34.1 F) in 1987, marked on the chart; the median year is -27.7 C (-17.9 F).
Coldest night (TNn) at Kotka Sunila by year
Year
Coldest night (TNn)
1959
-24.5 C (-12.1 F)
1960
-27.7 C (-17.9 F)
1961
-25.8 C (-14.4 F)
1962
-24.0 C (-11.2 F)
1963
-31.9 C (-25.4 F)
1964
-29.0 C (-20.2 F)
1965
-32.4 C (-26.3 F)
1966
-34.8 C (-30.6 F)
1967
-33.2 C (-27.8 F)
1968
-33.5 C (-28.3 F)
1969
-30.9 C (-23.6 F)
1970
-31.3 C (-24.3 F)
1971
-26.4 C (-15.5 F)
1972
-25.8 C (-14.4 F)
1973
-31.0 C (-23.8 F)
1974
-16.9 C (1.6 F)
1975
-25.1 C (-13.2 F)
1976
-29.4 C (-20.9 F)
1977
-30.4 C (-22.7 F)
1978
-31.1 C (-24.0 F)
1979
-29.6 C (-21.3 F)
1980
-28.9 C (-20.0 F)
1981
-24.5 C (-12.1 F)
1982
-29.6 C (-21.3 F)
1983
-21.0 C (-5.8 F)
1984
-21.0 C (-5.8 F)
1985
-30.0 C (-22.0 F)
1986
-26.0 C (-14.8 F)
1987
-36.7 C (-34.1 F)
1988
-21.7 C (-7.1 F)
1989
-25.5 C (-13.9 F)
1990
-22.5 C (-8.5 F)
1991
-23.2 C (-9.8 F)
1992
-21.0 C (-5.8 F)
1993
-20.2 C (-4.4 F)
Wettest day (Rx1day)
The wettest day of the year at Kotka Sunila, 1959 to 1993. The record is 69.7 mm (2.7 in) in 1978, marked on the chart; the median year is 29.4 mm (1.2 in).
Wettest day (Rx1day) at Kotka Sunila by year
Year
Wettest day (Rx1day)
1959
29.5 mm (1.2 in)
1960
23.7 mm (0.9 in)
1961
29.4 mm (1.2 in)
1962
39.4 mm (1.6 in)
1963
38.0 mm (1.5 in)
1964
32.0 mm (1.3 in)
1965
38.5 mm (1.5 in)
1966
50.0 mm (2.0 in)
1967
18.8 mm (0.7 in)
1968
26.5 mm (1.0 in)
1969
24.0 mm (0.9 in)
1970
21.4 mm (0.8 in)
1971
17.5 mm (0.7 in)
1972
30.3 mm (1.2 in)
1973
26.6 mm (1.0 in)
1974
34.9 mm (1.4 in)
1975
31.6 mm (1.2 in)
1976
23.7 mm (0.9 in)
1977
25.0 mm (1.0 in)
1978
69.7 mm (2.7 in)
1979
36.5 mm (1.4 in)
1980
40.9 mm (1.6 in)
1981
33.7 mm (1.3 in)
1982
27.1 mm (1.1 in)
1983
35.1 mm (1.4 in)
1984
19.6 mm (0.8 in)
1985
26.8 mm (1.1 in)
1986
25.8 mm (1.0 in)
1987
24.8 mm (1.0 in)
1988
59.8 mm (2.4 in)
1989
18.4 mm (0.7 in)
1990
30.2 mm (1.2 in)
1991
39.5 mm (1.6 in)
1992
18.0 mm (0.7 in)
1993
14.8 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Kotka Sunila, 1959 to 1993. The record is 107.8 mm (4.2 in) in 1978, marked on the chart; the median year is 48.7 mm (1.9 in).
Wettest five days (Rx5day) at Kotka Sunila by year
Year
Wettest five days (Rx5day)
1959
40.4 mm (1.6 in)
1960
45.8 mm (1.8 in)
1961
58.0 mm (2.3 in)
1962
62.0 mm (2.4 in)
1963
58.9 mm (2.3 in)
1964
41.6 mm (1.6 in)
1965
54.2 mm (2.1 in)
1966
82.0 mm (3.2 in)
1967
37.2 mm (1.5 in)
1968
44.9 mm (1.8 in)
1969
42.9 mm (1.7 in)
1970
56.3 mm (2.2 in)
1971
35.1 mm (1.4 in)
1972
44.3 mm (1.7 in)
1973
49.6 mm (2.0 in)
1974
53.3 mm (2.1 in)
1975
42.6 mm (1.7 in)
1976
35.2 mm (1.4 in)
1977
42.5 mm (1.7 in)
1978
107.8 mm (4.2 in)
1979
48.1 mm (1.9 in)
1980
75.5 mm (3.0 in)
1981
57.0 mm (2.2 in)
1982
81.1 mm (3.2 in)
1983
66.5 mm (2.6 in)
1984
53.5 mm (2.1 in)
1985
48.7 mm (1.9 in)
1986
46.5 mm (1.8 in)
1987
59.5 mm (2.3 in)
1988
67.3 mm (2.6 in)
1989
48.3 mm (1.9 in)
1990
38.6 mm (1.5 in)
1991
56.9 mm (2.2 in)
1992
45.1 mm (1.8 in)
1993
26.0 mm (1.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Kotka Sunila, 1959 to 1993. The record is 38 days in 1972, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Kotka Sunila by year
Year
Longest dry spell (CDD)
1959
24 days
1960
20 days
1961
22 days
1962
19 days
1963
34 days
1964
28 days
1965
24 days
1966
22 days
1967
13 days
1968
19 days
1969
27 days
1970
15 days
1971
18 days
1972
38 days
1973
19 days
1974
25 days
1975
16 days
1976
23 days
1977
12 days
1978
21 days
1979
21 days
1980
23 days
1981
19 days
1982
13 days
1983
28 days
1984
20 days
1985
14 days
1986
24 days
1987
26 days
1988
14 days
1989
16 days
1990
13 days
1991
21 days
1992
31 days
1993
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
33 years with a frost
Across 33 years with a frost, the median last spring frost at Kotka Sunila falls on 15 May and the median first autumn frost on 24 September, which leaves a median of 129 days between them.
Fitted over all years, the growing season changes by +14.5 days per decade at this station.
Frost dates and growing season at Kotka Sunila
Measure
Median, all years
Earliest period
Recent period (1963 to 1992)
Recent against earliest
Fitted trend
Last spring frost
15 May
n/a
14 May
n/a
-6.6 days per decade
First autumn frost
24 September
n/a
24 September
n/a
+7.8 days per decade
Growing days
129 days
n/a
132 days
n/a
+14.5 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
34 years, 1959 to 1992
A day with at least 28.7 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 73.5 mm (2.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Kotka Sunila: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
28.7 mm (1.1 in)
5 years
38.4 mm (1.5 in)
10 years
45.6 mm (1.8 in)
25 years
55.9 mm (2.2 in)
50 years
64.3 mm (2.5 in)
Longer than the 34 years of record
100 years
73.5 mm (2.9 in)
Longer than the 34 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, 34 years of values from 1959 to 1992.
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: 69.7 mm (2.7 in) in 1978; 59.8 mm (2.4 in) in 1988; 50.0 mm (2.0 in) in 1966.
Download the Data
Data for Kotka Sunila standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Kotka Sunila 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.