Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Kotka Haapasaari. The lines show the 2026 daily maximum and minimum. 15 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Kotka Haapasaari, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
7.7 C (45.9 F)
-25.7 C (-14.3 F)
0.3 C (32.5 F)
-19.9 C (-3.8 F)
Feb
5.7 C (42.3 F)
-26.7 C (-16.1 F)
1.7 C (35.1 F)
-24.5 C (-12.1 F)
Mar
8.7 C (47.7 F)
-22.9 C (-9.2 F)
5.9 C (42.6 F)
-2.4 C (27.7 F)
Apr
17.7 C (63.9 F)
-12.9 C (8.8 F)
12.6 C (54.7 F)
-1.8 C (28.8 F)
May
26.5 C (79.7 F)
-4.2 C (24.4 F)
22.2 C (72.0 F)
2.8 C (37.0 F)
Jun
29.7 C (85.5 F)
3.9 C (39.0 F)
21.8 C (71.2 F)
9.6 C (49.3 F)
Jul
31.3 C (88.3 F)
8.9 C (48.0 F)
27.6 C (81.7 F)
11.5 C (52.7 F)
Aug
28.5 C (83.3 F)
8.7 C (47.7 F)
21.6 C (70.9 F)
11.6 C (52.9 F)
Sep
24.9 C (76.8 F)
2.8 C (37.0 F)
n/a
n/a
Oct
16.4 C (61.5 F)
-3.2 C (26.2 F)
n/a
n/a
Nov
12.5 C (54.5 F)
-11.9 C (10.6 F)
n/a
n/a
Dec
8.9 C (48.0 F)
-24.2 C (-11.6 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Kotka Haapasaari still stand. 2020 holds the most, with 97.
Standing records at Kotka Haapasaari by the year they were set
Year set
Standing records
1993
60
1994
30
1995
31
1996
69
1997
35
1998
52
1999
42
2000
32
2001
30
2002
73
2003
68
2004
18
2005
23
2006
53
2007
19
2008
29
2009
17
2010
58
2011
42
2012
20
2013
32
2014
49
2015
37
2016
35
2017
24
2018
56
2019
52
2020
97
2021
59
2022
35
2023
28
2024
84
2025
56
2026
19
Period of Record Coverage
1993 to 2026
Complete yearUnder 90 percent of days
34 years of record at Kotka Haapasaari, 1993 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1993, 1997, 2026.
Cooler than the station meanWarmer than the station mean
One stripe for each of 31 complete years at Kotka Haapasaari, 1994 to 2025. Blue stripes are years cooler than the station's own mean of 6.4 C (43.6 F); red stripes are warmer. The coolest year was 1996, at 4.4 C (39.9 F), and the warmest was 2020, at 8.5 C (47.3 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Kotka Haapasaari as warming stripes, 1994 to 2025
Year
Annual mean temperature
Difference from the station mean
1994
4.6 C
-1.87 C
1995
6.2 C
-0.25 C
1996
4.4 C
-2.04 C
1998
5.0 C
-1.41 C
1999
5.8 C
-0.65 C
2000
7.0 C
+0.58 C
2001
6.0 C
-0.48 C
2002
6.0 C
-0.40 C
2003
5.1 C
-1.36 C
2004
5.9 C
-0.51 C
2005
6.6 C
+0.18 C
2006
6.1 C
-0.29 C
2007
6.7 C
+0.24 C
2008
7.3 C
+0.89 C
2009
6.2 C
-0.20 C
2010
4.9 C
-1.56 C
2011
6.6 C
+0.20 C
2012
5.8 C
-0.64 C
2013
6.7 C
+0.29 C
2014
7.2 C
+0.79 C
2015
7.5 C
+1.03 C
2016
6.5 C
+0.03 C
2017
6.3 C
-0.13 C
2018
6.9 C
+0.45 C
2019
7.2 C
+0.72 C
2020
8.5 C
+2.05 C
2021
6.4 C
-0.02 C
2022
7.0 C
+0.59 C
2023
6.9 C
+0.50 C
2024
7.9 C
+1.47 C
2025
8.2 C
+1.73 C
The annual mean temperature here has risen by 0.8 C (0.5 to 1.0) per decade over 1994 to 2025. In Fahrenheit: 1.4 F (0.9 to 1.9) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Kotka Haapasaari
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.8 C (0.5 to 1.0) per decade
1.4 F (0.9 to 1.9) per decade
1994 to 2025
31
Rise
Mean daily maximum
0.7 C (0.4 to 0.9) per decade
1.2 F (0.8 to 1.7) per decade
1994 to 2025
31
Rise
Mean daily minimum
0.9 C (0.5 to 1.2) per decade
1.6 F (1.0 to 2.1) per decade
1994 to 2025
31
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
1993 to 2026
Yearly extremes at Kotka Haapasaari: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
31.3 C (88.3 F)
2018
26.6 C (79.9 F)
34
Coldest night (TNn)
-26.7 C (-16.1 F)
1994
-19.3 C (-2.7 F)
34
Hottest day (TXx)
The hottest day of the year at Kotka Haapasaari, 1993 to 2026. The record is 31.3 C (88.3 F) in 2018, marked on the chart; the median year is 26.6 C (79.9 F).
Hottest day (TXx) at Kotka Haapasaari by year
Year
Hottest day (TXx)
1993
21.1 C (70.0 F)
1994
27.0 C (80.6 F)
1995
24.5 C (76.1 F)
1996
23.6 C (74.5 F)
1997
27.3 C (81.1 F)
1998
26.7 C (80.1 F)
1999
28.2 C (82.8 F)
2000
25.1 C (77.2 F)
2001
28.6 C (83.5 F)
2002
25.9 C (78.6 F)
2003
29.9 C (85.8 F)
2004
24.9 C (76.8 F)
2005
25.4 C (77.7 F)
2006
25.6 C (78.1 F)
2007
26.4 C (79.5 F)
2008
25.4 C (77.7 F)
2009
26.7 C (80.1 F)
2010
29.1 C (84.4 F)
2011
29.1 C (84.4 F)
2012
25.9 C (78.6 F)
2013
29.7 C (85.5 F)
2014
28.3 C (82.9 F)
2015
23.3 C (73.9 F)
2016
24.3 C (75.7 F)
2017
22.1 C (71.8 F)
2018
31.3 C (88.3 F)
2019
31.2 C (88.2 F)
2020
25.8 C (78.4 F)
2021
30.4 C (86.7 F)
2022
26.8 C (80.2 F)
2023
25.8 C (78.4 F)
2024
26.5 C (79.7 F)
2025
29.3 C (84.7 F)
2026
27.6 C (81.7 F)
Coldest night (TNn)
The coldest night of the year at Kotka Haapasaari, 1993 to 2026. The record is -26.7 C (-16.1 F) in 1994, marked on the chart; the median year is -19.3 C (-2.7 F).
Coldest night (TNn) at Kotka Haapasaari by year
Year
Coldest night (TNn)
1993
-15.2 C (4.6 F)
1994
-26.7 C (-16.1 F)
1995
-18.9 C (-2.0 F)
1996
-22.6 C (-8.7 F)
1997
-15.2 C (4.6 F)
1998
-19.8 C (-3.6 F)
1999
-26.5 C (-15.7 F)
2000
-13.9 C (7.0 F)
2001
-21.0 C (-5.8 F)
2002
-24.2 C (-11.6 F)
2003
-25.7 C (-14.3 F)
2004
-19.7 C (-3.5 F)
2005
-17.3 C (0.9 F)
2006
-22.9 C (-9.2 F)
2007
-22.0 C (-7.6 F)
2008
-8.4 C (16.9 F)
2009
-11.9 C (10.6 F)
2010
-25.4 C (-13.7 F)
2011
-25.2 C (-13.4 F)
2012
-22.2 C (-8.0 F)
2013
-18.8 C (-1.8 F)
2014
-16.9 C (1.6 F)
2015
-11.5 C (11.3 F)
2016
-23.9 C (-11.0 F)
2017
-16.4 C (2.5 F)
2018
-21.5 C (-6.7 F)
2019
-17.6 C (0.3 F)
2020
-7.0 C (19.4 F)
2021
-20.3 C (-4.5 F)
2022
-16.4 C (2.5 F)
2023
-13.0 C (8.6 F)
2024
-16.1 C (3.0 F)
2025
-12.3 C (9.9 F)
2026
-24.5 C (-12.1 F)
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
31 years with a frost
Across 31 years with a frost, the median last spring frost at Kotka Haapasaari falls on 20 April and the median first autumn frost on 7 November, which leaves a median of 203 days between them.
Fitted over all years, the growing season changes by +6.4 days per decade at this station.
Frost dates and growing season at Kotka Haapasaari
Measure
Median, all years
Earliest period
Recent period (1995 to 2025)
Recent against earliest
Fitted trend
Last spring frost
20 April
n/a
20 April
n/a
-2.9 days per decade
First autumn frost
7 November
n/a
8 November
n/a
+3.5 days per decade
Growing days
203 days
n/a
204 days
n/a
+6.4 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.
Download the Data
Data for Kotka Haapasaari standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Kotka Haapasaari 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.