Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Hanko Tulliniemi. The lines show the 2026 daily maximum and minimum. 9 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Hanko Tulliniemi, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
7.1 C (44.8 F)
-25.4 C (-13.7 F)
1.9 C (35.4 F)
-14.5 C (5.9 F)
Feb
8.4 C (47.1 F)
-22.7 C (-8.9 F)
2.1 C (35.8 F)
-19.4 C (-2.9 F)
Mar
12.5 C (54.5 F)
-17.2 C (1.0 F)
5.9 C (42.6 F)
-1.8 C (28.8 F)
Apr
18.1 C (64.6 F)
-8.9 C (16.0 F)
16.1 C (61.0 F)
-1.0 C (30.2 F)
May
24.6 C (76.3 F)
-1.4 C (29.5 F)
16.4 C (61.5 F)
4.0 C (39.2 F)
Jun
27.9 C (82.2 F)
4.8 C (40.6 F)
22.5 C (72.5 F)
8.8 C (47.8 F)
Jul
28.9 C (84.0 F)
9.9 C (49.8 F)
26.5 C (79.7 F)
11.0 C (51.8 F)
Aug
27.6 C (81.7 F)
7.9 C (46.2 F)
21.3 C (70.3 F)
11.7 C (53.1 F)
Sep
22.5 C (72.5 F)
2.8 C (37.0 F)
n/a
n/a
Oct
16.5 C (61.7 F)
-5.0 C (23.0 F)
n/a
n/a
Nov
12.9 C (55.2 F)
-13.1 C (8.4 F)
n/a
n/a
Dec
8.9 C (48.0 F)
-22.3 C (-8.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Hanko Tulliniemi still stand. 2020 holds the most, with 111.
Standing records at Hanko Tulliniemi by the year they were set
Year set
Standing records
1993
74
1994
33
1995
27
1996
60
1997
38
1998
40
1999
26
2000
20
2001
36
2002
78
2003
75
2004
23
2005
30
2006
63
2007
26
2008
34
2009
24
2010
60
2011
43
2012
13
2013
32
2014
49
2015
45
2016
28
2017
24
2018
47
2019
43
2020
111
2021
37
2022
38
2023
50
2024
70
2025
53
2026
14
Period of Record Coverage
1993 to 2026
Complete yearUnder 90 percent of days
34 years of record at Hanko Tulliniemi, 1993 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1993, 2000, 2026.
Cooler than the station meanWarmer than the station mean
One stripe for each of 31 complete years at Hanko Tulliniemi, 1994 to 2025. Blue stripes are years cooler than the station's own mean of 7.0 C (44.5 F); red stripes are warmer. The coolest year was 1996, at 5.2 C (41.4 F), and the warmest was 2020, at 9.1 C (48.3 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Hanko Tulliniemi as warming stripes, 1994 to 2025
Year
Annual mean temperature
Difference from the station mean
1994
5.8 C
-1.15 C
1995
6.8 C
-0.18 C
1996
5.2 C
-1.74 C
1997
6.9 C
-0.12 C
1998
6.0 C
-1.00 C
1999
6.8 C
-0.20 C
2001
6.3 C
-0.72 C
2002
6.3 C
-0.70 C
2003
5.5 C
-1.47 C
2004
6.6 C
-0.39 C
2005
6.5 C
-0.44 C
2006
6.8 C
-0.18 C
2007
7.2 C
+0.27 C
2008
7.9 C
+0.92 C
2009
6.7 C
-0.31 C
2010
5.3 C
-1.72 C
2011
7.3 C
+0.33 C
2012
6.3 C
-0.65 C
2013
7.0 C
+0.01 C
2014
7.7 C
+0.69 C
2015
8.1 C
+1.17 C
2016
7.1 C
+0.13 C
2017
7.1 C
+0.11 C
2018
7.5 C
+0.50 C
2019
7.8 C
+0.80 C
2020
9.1 C
+2.09 C
2021
7.0 C
-0.02 C
2022
7.8 C
+0.78 C
2023
7.5 C
+0.53 C
2024
8.1 C
+1.10 C
2025
8.6 C
+1.58 C
The annual mean temperature here has risen by 0.7 C (0.4 to 1.0) per decade over 1994 to 2025. In Fahrenheit: 1.2 F (0.8 to 1.7) 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 Hanko Tulliniemi
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.7 C (0.4 to 1.0) per decade
1.2 F (0.8 to 1.7) per decade
1994 to 2025
31
Rise
Mean daily maximum
0.6 C (0.4 to 0.8) per decade
1.1 F (0.7 to 1.5) per decade
1994 to 2025
31
Rise
Mean daily minimum
0.8 C (0.5 to 1.1) per decade
1.4 F (0.9 to 1.9) 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 Hanko Tulliniemi: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
28.9 C (84.0 F)
2003
25.8 C (78.4 F)
34
Coldest night (TNn)
-25.4 C (-13.7 F)
2003
-16.7 C (1.9 F)
34
Hottest day (TXx)
The hottest day of the year at Hanko Tulliniemi, 1993 to 2026. The record is 28.9 C (84.0 F) in 2003, marked on the chart; the median year is 25.8 C (78.4 F).
Hottest day (TXx) at Hanko Tulliniemi by year
Year
Hottest day (TXx)
1993
21.1 C (70.0 F)
1994
27.4 C (81.3 F)
1995
25.8 C (78.4 F)
1996
25.5 C (77.9 F)
1997
28.8 C (83.8 F)
1998
22.7 C (72.9 F)
1999
26.4 C (79.5 F)
2000
23.3 C (73.9 F)
2001
27.0 C (80.6 F)
2002
24.7 C (76.5 F)
2003
28.9 C (84.0 F)
2004
25.3 C (77.5 F)
2005
24.7 C (76.5 F)
2006
26.0 C (78.8 F)
2007
23.6 C (74.5 F)
2008
27.2 C (81.0 F)
2009
25.3 C (77.5 F)
2010
26.3 C (79.3 F)
2011
27.7 C (81.9 F)
2012
23.2 C (73.8 F)
2013
22.9 C (73.2 F)
2014
28.9 C (84.0 F)
2015
23.4 C (74.1 F)
2016
23.3 C (73.9 F)
2017
21.3 C (70.3 F)
2018
28.4 C (83.1 F)
2019
28.0 C (82.4 F)
2020
27.9 C (82.2 F)
2021
28.6 C (83.5 F)
2022
25.7 C (78.3 F)
2023
25.5 C (77.9 F)
2024
25.3 C (77.5 F)
2025
26.2 C (79.2 F)
2026
26.5 C (79.7 F)
Coldest night (TNn)
The coldest night of the year at Hanko Tulliniemi, 1993 to 2026. The record is -25.4 C (-13.7 F) in 2003, marked on the chart; the median year is -16.7 C (1.9 F).
Coldest night (TNn) at Hanko Tulliniemi by year
Year
Coldest night (TNn)
1993
-15.3 C (4.5 F)
1994
-19.7 C (-3.5 F)
1995
-15.4 C (4.3 F)
1996
-19.4 C (-2.9 F)
1997
-16.3 C (2.7 F)
1998
-16.3 C (2.7 F)
1999
-25.0 C (-13.0 F)
2000
-10.7 C (12.7 F)
2001
-22.7 C (-8.9 F)
2002
-22.3 C (-8.1 F)
2003
-25.4 C (-13.7 F)
2004
-15.0 C (5.0 F)
2005
-17.2 C (1.0 F)
2006
-20.8 C (-5.4 F)
2007
-19.9 C (-3.8 F)
2008
-8.5 C (16.7 F)
2009
-12.2 C (10.0 F)
2010
-20.5 C (-4.9 F)
2011
-21.0 C (-5.8 F)
2012
-18.6 C (-1.5 F)
2013
-17.1 C (1.2 F)
2014
-14.4 C (6.1 F)
2015
-10.7 C (12.7 F)
2016
-20.1 C (-4.2 F)
2017
-16.3 C (2.7 F)
2018
-17.9 C (-0.2 F)
2019
-12.3 C (9.9 F)
2020
-5.5 C (22.1 F)
2021
-17.6 C (0.3 F)
2022
-10.8 C (12.6 F)
2023
-11.3 C (11.7 F)
2024
-15.7 C (3.7 F)
2025
-8.9 C (16.0 F)
2026
-19.4 C (-2.9 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 Hanko Tulliniemi falls on 16 April and the median first autumn frost on 4 November, which leaves a median of 201 days between them.
Fitted over all years, the growing season changes by +8.0 days per decade at this station.
Frost dates and growing season at Hanko Tulliniemi
Measure
Median, all years
Earliest period
Recent period (1995 to 2025)
Recent against earliest
Fitted trend
Last spring frost
16 April
n/a
16 April
n/a
-4.3 days per decade
First autumn frost
4 November
n/a
5 November
n/a
+3.7 days per decade
Growing days
201 days
n/a
203 days
n/a
+8.0 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 Hanko Tulliniemi standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hanko Tulliniemi 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.