Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Mietoinen Saari. 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 Mietoinen Saari, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
8.2 C (46.8 F)
-34.3 C (-29.7 F)
n/a
n/a
Feb
10.0 C (50.0 F)
-35.8 C (-32.4 F)
n/a
n/a
Mar
15.3 C (59.5 F)
-25.6 C (-14.1 F)
n/a
n/a
Apr
22.6 C (72.7 F)
-18.1 C (-0.6 F)
n/a
n/a
May
29.1 C (84.4 F)
-6.2 C (20.8 F)
n/a
n/a
Jun
30.3 C (86.5 F)
-2.0 C (28.4 F)
n/a
n/a
Jul
33.3 C (91.9 F)
2.5 C (36.5 F)
n/a
n/a
Aug
31.9 C (89.4 F)
-0.1 C (31.8 F)
n/a
n/a
Sep
27.3 C (81.1 F)
-7.2 C (19.0 F)
n/a
n/a
Oct
17.9 C (64.2 F)
-15.0 C (5.0 F)
n/a
n/a
Nov
11.4 C (52.5 F)
-20.5 C (-4.9 F)
n/a
n/a
Dec
9.2 C (48.6 F)
-34.5 C (-30.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Mietoinen Saari still stand. 2006 holds the most, with 56.
Standing records at Mietoinen Saari by the year they were set
Year set
Standing records
1959
30
1960
20
1961
24
1962
28
1963
27
1964
9
1965
42
1966
43
1967
32
1968
36
1969
27
1970
30
1971
33
1972
28
1973
38
1974
18
1975
39
1976
22
1977
37
1978
41
1979
19
1980
25
1981
28
1982
23
1983
22
1984
34
1985
26
1986
21
1987
36
1988
23
1989
40
1990
37
1991
19
1992
35
1993
29
1994
16
1995
26
1996
21
1997
38
1998
29
1999
36
2000
31
2001
26
2002
44
2003
40
2004
24
2005
27
2006
56
2007
29
All-Time Record Progression
2 new records
2 all-time records were set at Mietoinen Saari between 27 August 2001 and 15 July 2003. Each dot is a new record.
When Mietoinen Saari set new all-time records
Date
Kind
Detail
2001-08-27
Record daily precipitation
Record daily precipitation 66.6 mm (2.6 in)
2003-07-15
Record high maximum temperature
Record high maximum temperature 33.3 C (91.9 F)
Wettest Day of Each Month
Aug: 66.6 mm (2.6 in)
The wettest day on record for each calendar month at Mietoinen Saari. The most was 66.6 mm (2.6 in) on 27 August 2001.
Record daily precipitation for each month at Mietoinen Saari
Month
Record daily precipitation (mm)
Date
Jan
26.8 mm (1.1 in)
24 January 2002
Feb
17.1 mm (0.7 in)
19 February 1990
Mar
28.5 mm (1.1 in)
11 March 1989
Apr
20.8 mm (0.8 in)
17 April 1972
May
24.0 mm (0.9 in)
1 May 2003
Jun
54.7 mm (2.2 in)
15 June 1961
Jul
66.0 mm (2.6 in)
17 July 1985
Aug
66.6 mm (2.6 in)
27 August 2001
Sep
42.7 mm (1.7 in)
6 September 1997
Oct
33.0 mm (1.3 in)
7 October 1980
Nov
30.2 mm (1.2 in)
18 November 1981
Dec
36.0 mm (1.4 in)
30 December 1983
Period of Record Coverage
1959 to 2007
Complete yearUnder 90 percent of days
49 years of record at Mietoinen Saari, 1959 to 2007. 2 years have data for under 90 percent of days and are left out of rankings: 1959, 2007.
Cooler than the station meanWarmer than the station mean
One stripe for each of 47 complete years at Mietoinen Saari, 1960 to 2006. Blue stripes are years cooler than the station's own mean of 5.0 C (41.1 F); red stripes are warmer. The coolest year was 1985, at 2.9 C (37.2 F), and the warmest was 2000, at 6.8 C (44.2 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Mietoinen Saari as warming stripes, 1960 to 2006
Year
Annual mean temperature
Difference from the station mean
1960
4.6 C
-0.39 C
1961
6.2 C
+1.17 C
1962
4.0 C
-1.07 C
1963
4.1 C
-0.94 C
1964
4.7 C
-0.35 C
1965
4.2 C
-0.85 C
1966
3.5 C
-1.53 C
1967
4.8 C
-0.24 C
1968
4.1 C
-0.89 C
1969
3.8 C
-1.27 C
1970
3.8 C
-1.24 C
1971
4.9 C
-0.17 C
1972
5.8 C
+0.77 C
1973
5.0 C
-0.08 C
1974
6.2 C
+1.13 C
1975
6.5 C
+1.45 C
1976
3.6 C
-1.47 C
1977
4.3 C
-0.75 C
1978
3.4 C
-1.64 C
1979
4.2 C
-0.86 C
1980
4.4 C
-0.66 C
1981
4.3 C
-0.77 C
1982
4.8 C
-0.21 C
1983
5.4 C
+0.35 C
1984
5.5 C
+0.46 C
1985
2.9 C
-2.16 C
1986
4.3 C
-0.71 C
1987
3.0 C
-2.00 C
1988
5.4 C
+0.40 C
1989
6.7 C
+1.67 C
1990
6.5 C
+1.48 C
1991
5.9 C
+0.82 C
1992
6.1 C
+1.10 C
1993
5.3 C
+0.28 C
1994
5.0 C
-0.07 C
1995
5.8 C
+0.74 C
1996
4.6 C
-0.44 C
1997
5.9 C
+0.83 C
1998
5.2 C
+0.15 C
1999
5.9 C
+0.91 C
2000
6.8 C
+1.77 C
2001
5.7 C
+0.63 C
2002
5.7 C
+0.70 C
2003
5.5 C
+0.49 C
2004
5.9 C
+0.91 C
2005
6.2 C
+1.14 C
2006
6.5 C
+1.51 C
The annual mean temperature here has risen by 0.4 C (0.2 to 0.6) per decade over 1960 to 2006. In Fahrenheit: 0.7 F (0.3 to 1.0) 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 Mietoinen Saari
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.4 C (0.2 to 0.6) per decade
0.7 F (0.3 to 1.0) per decade
1960 to 2006
47
Rise
Mean daily maximum
0.4 C (0.2 to 0.6) per decade
0.7 F (0.4 to 1.1) per decade
1960 to 2006
47
Rise
Mean daily minimum
0.4 C (0.1 to 0.6) per decade
0.6 F (0.3 to 1.0) per decade
1960 to 2006
47
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 2007
Yearly extremes at Mietoinen Saari: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
33.3 C (91.9 F)
2003
29.0 C (84.2 F)
49
Coldest night (TNn)
-35.8 C (-32.4 F)
1966
-25.3 C (-13.5 F)
49
Wettest day (Rx1day)
66.6 mm (2.6 in)
2001
28.0 mm (1.1 in)
47
Wettest five days (Rx5day)
125.0 mm (4.9 in)
1967
50.9 mm (2.0 in)
47
Longest dry spell (CDD)
39 days
1960
22 days
47
Hottest day (TXx)
The hottest day of the year at Mietoinen Saari, 1959 to 2007. The record is 33.3 C (91.9 F) in 2003, marked on the chart; the median year is 29.0 C (84.2 F).
Hottest day (TXx) at Mietoinen Saari by year
Year
Hottest day (TXx)
1959
30.4 C (86.7 F)
1960
30.1 C (86.2 F)
1961
27.8 C (82.0 F)
1962
22.2 C (72.0 F)
1963
30.1 C (86.2 F)
1964
27.2 C (81.0 F)
1965
26.6 C (79.9 F)
1966
30.2 C (86.4 F)
1967
28.9 C (84.0 F)
1968
28.4 C (83.1 F)
1969
30.7 C (87.3 F)
1970
27.2 C (81.0 F)
1971
27.9 C (82.2 F)
1972
30.2 C (86.4 F)
1973
31.0 C (87.8 F)
1974
28.4 C (83.1 F)
1975
31.3 C (88.3 F)
1976
25.9 C (78.6 F)
1977
30.3 C (86.5 F)
1978
26.0 C (78.8 F)
1979
28.4 C (83.1 F)
1980
30.0 C (86.0 F)
1981
28.8 C (83.8 F)
1982
29.4 C (84.9 F)
1983
29.4 C (84.9 F)
1984
28.5 C (83.3 F)
1985
26.6 C (79.9 F)
1986
29.0 C (84.2 F)
1987
26.9 C (80.4 F)
1988
29.9 C (85.8 F)
1989
27.5 C (81.5 F)
1990
26.0 C (78.8 F)
1991
29.3 C (84.7 F)
1992
29.6 C (85.3 F)
1993
28.6 C (83.5 F)
1994
31.2 C (88.2 F)
1995
29.6 C (85.3 F)
1996
27.7 C (81.9 F)
1997
31.3 C (88.3 F)
1998
27.3 C (81.1 F)
1999
31.0 C (87.8 F)
2000
27.6 C (81.7 F)
2001
30.8 C (87.4 F)
2002
29.2 C (84.6 F)
2003
33.3 C (91.9 F)
2004
28.8 C (83.8 F)
2005
30.0 C (86.0 F)
2006
31.9 C (89.4 F)
2007
25.6 C (78.1 F)
Coldest night (TNn)
The coldest night of the year at Mietoinen Saari, 1959 to 2007. The record is -35.8 C (-32.4 F) in 1966, marked on the chart; the median year is -25.3 C (-13.5 F).
Coldest night (TNn) at Mietoinen Saari by year
Year
Coldest night (TNn)
1959
-25.4 C (-13.7 F)
1960
-25.8 C (-14.4 F)
1961
-23.8 C (-10.8 F)
1962
-24.9 C (-12.8 F)
1963
-27.4 C (-17.3 F)
1964
-25.2 C (-13.4 F)
1965
-25.6 C (-14.1 F)
1966
-35.8 C (-32.4 F)
1967
-31.6 C (-24.9 F)
1968
-32.5 C (-26.5 F)
1969
-25.3 C (-13.5 F)
1970
-31.5 C (-24.7 F)
1971
-21.4 C (-6.5 F)
1972
-21.3 C (-6.3 F)
1973
-26.9 C (-16.4 F)
1974
-10.8 C (12.6 F)
1975
-19.5 C (-3.1 F)
1976
-25.3 C (-13.5 F)
1977
-29.4 C (-20.9 F)
1978
-34.5 C (-30.1 F)
1979
-35.2 C (-31.4 F)
1980
-26.3 C (-15.3 F)
1981
-25.0 C (-13.0 F)
1982
-30.1 C (-22.2 F)
1983
-19.6 C (-3.3 F)
1984
-23.6 C (-10.5 F)
1985
-33.6 C (-28.5 F)
1986
-26.8 C (-16.2 F)
1987
-34.3 C (-29.7 F)
1988
-21.8 C (-7.2 F)
1989
-22.6 C (-8.7 F)
1990
-18.8 C (-1.8 F)
1991
-18.2 C (-0.8 F)
1992
-19.7 C (-3.5 F)
1993
-21.9 C (-7.4 F)
1994
-25.3 C (-13.5 F)
1995
-23.5 C (-10.3 F)
1996
-28.5 C (-19.3 F)
1997
-21.7 C (-7.1 F)
1998
-21.7 C (-7.1 F)
1999
-28.3 C (-18.9 F)
2000
-20.0 C (-4.0 F)
2001
-26.8 C (-16.2 F)
2002
-24.5 C (-12.1 F)
2003
-28.1 C (-18.6 F)
2004
-20.4 C (-4.7 F)
2005
-20.1 C (-4.2 F)
2006
-21.5 C (-6.7 F)
2007
-26.4 C (-15.5 F)
Wettest day (Rx1day)
The wettest day of the year at Mietoinen Saari, 1959 to 2007. The record is 66.6 mm (2.6 in) in 2001, marked on the chart; the median year is 28.0 mm (1.1 in).
Wettest day (Rx1day) at Mietoinen Saari by year
Year
Wettest day (Rx1day)
1959
12.7 mm (0.5 in)
1960
23.8 mm (0.9 in)
1961
58.7 mm (2.3 in)
1962
29.8 mm (1.2 in)
1963
20.5 mm (0.8 in)
1964
40.6 mm (1.6 in)
1965
40.9 mm (1.6 in)
1966
41.5 mm (1.6 in)
1967
66.4 mm (2.6 in)
1968
23.4 mm (0.9 in)
1969
22.2 mm (0.9 in)
1970
21.5 mm (0.8 in)
1971
19.3 mm (0.8 in)
1972
36.2 mm (1.4 in)
1973
14.9 mm (0.6 in)
1974
27.5 mm (1.1 in)
1975
22.4 mm (0.9 in)
1976
20.2 mm (0.8 in)
1977
28.2 mm (1.1 in)
1978
29.5 mm (1.2 in)
1979
22.7 mm (0.9 in)
1980
33.0 mm (1.3 in)
1981
40.8 mm (1.6 in)
1982
25.5 mm (1.0 in)
1983
36.0 mm (1.4 in)
1984
32.1 mm (1.3 in)
1985
66.0 mm (2.6 in)
1986
35.5 mm (1.4 in)
1987
51.9 mm (2.0 in)
1988
56.7 mm (2.2 in)
1989
28.5 mm (1.1 in)
1990
24.0 mm (0.9 in)
1991
27.1 mm (1.1 in)
1992
28.0 mm (1.1 in)
1993
31.7 mm (1.2 in)
1994
21.5 mm (0.8 in)
1995
23.4 mm (0.9 in)
1996
22.5 mm (0.9 in)
1997
57.3 mm (2.3 in)
1998
17.5 mm (0.7 in)
1999
23.6 mm (0.9 in)
2000
32.7 mm (1.3 in)
2001
66.6 mm (2.6 in)
2002
26.8 mm (1.1 in)
2003
24.0 mm (0.9 in)
2004
27.9 mm (1.1 in)
2005
31.0 mm (1.2 in)
2006
n/a
2007
n/a
Wettest five days (Rx5day)
The wettest five days of the year at Mietoinen Saari, 1959 to 2007. The record is 125.0 mm (4.9 in) in 1967, marked on the chart; the median year is 50.9 mm (2.0 in).
Wettest five days (Rx5day) at Mietoinen Saari by year
Year
Wettest five days (Rx5day)
1959
33.8 mm (1.3 in)
1960
50.2 mm (2.0 in)
1961
72.8 mm (2.9 in)
1962
55.2 mm (2.2 in)
1963
44.4 mm (1.7 in)
1964
48.1 mm (1.9 in)
1965
51.2 mm (2.0 in)
1966
44.7 mm (1.8 in)
1967
125.0 mm (4.9 in)
1968
39.1 mm (1.5 in)
1969
53.9 mm (2.1 in)
1970
35.5 mm (1.4 in)
1971
36.6 mm (1.4 in)
1972
97.3 mm (3.8 in)
1973
42.3 mm (1.7 in)
1974
49.2 mm (1.9 in)
1975
42.7 mm (1.7 in)
1976
37.9 mm (1.5 in)
1977
52.8 mm (2.1 in)
1978
43.1 mm (1.7 in)
1979
47.2 mm (1.9 in)
1980
63.6 mm (2.5 in)
1981
76.2 mm (3.0 in)
1982
53.5 mm (2.1 in)
1983
53.0 mm (2.1 in)
1984
58.1 mm (2.3 in)
1985
78.1 mm (3.1 in)
1986
67.6 mm (2.7 in)
1987
73.9 mm (2.9 in)
1988
90.0 mm (3.5 in)
1989
46.7 mm (1.8 in)
1990
42.4 mm (1.7 in)
1991
54.3 mm (2.1 in)
1992
48.8 mm (1.9 in)
1993
71.5 mm (2.8 in)
1994
50.6 mm (2.0 in)
1995
36.9 mm (1.5 in)
1996
48.2 mm (1.9 in)
1997
121.6 mm (4.8 in)
1998
34.9 mm (1.4 in)
1999
57.4 mm (2.3 in)
2000
65.8 mm (2.6 in)
2001
72.7 mm (2.9 in)
2002
50.9 mm (2.0 in)
2003
35.6 mm (1.4 in)
2004
45.5 mm (1.8 in)
2005
82.1 mm (3.2 in)
2006
n/a
2007
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Mietoinen Saari, 1959 to 2007. The record is 39 days in 1960, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Mietoinen Saari by year
Year
Longest dry spell (CDD)
1959
34 days
1960
39 days
1961
23 days
1962
13 days
1963
19 days
1964
27 days
1965
24 days
1966
17 days
1967
12 days
1968
21 days
1969
26 days
1970
23 days
1971
19 days
1972
37 days
1973
15 days
1974
21 days
1975
17 days
1976
26 days
1977
16 days
1978
22 days
1979
18 days
1980
23 days
1981
20 days
1982
23 days
1983
22 days
1984
21 days
1985
18 days
1986
23 days
1987
29 days
1988
15 days
1989
21 days
1990
17 days
1991
22 days
1992
24 days
1993
25 days
1994
37 days
1995
14 days
1996
21 days
1997
20 days
1998
21 days
1999
26 days
2000
31 days
2001
18 days
2002
37 days
2003
33 days
2004
17 days
2005
24 days
2006
n/a
2007
n/a
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 Mietoinen Saari falls on 20 May and the median first autumn frost on 23 September, which leaves a median of 127 days between them.
Fitted over all years, the growing season changes by +0.2 days per decade at this station.
Frost dates and growing season at Mietoinen Saari
Measure
Median, all years
Earliest period
Recent period (1977 to 2006)
Recent against earliest
Fitted trend
Last spring frost
20 May
n/a
19 May
n/a
-0.6 days per decade
First autumn frost
23 September
n/a
23 September
n/a
-0.4 days per decade
Growing days
127 days
n/a
126 days
n/a
+0.2 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
47 years, 1959 to 2005
A day with at least 28.5 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 88.7 mm (3.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Mietoinen Saari: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
28.5 mm (1.1 in)
5 years
40.1 mm (1.6 in)
10 years
49.2 mm (1.9 in)
25 years
63.0 mm (2.5 in)
50 years
75.0 mm (3.0 in)
Longer than the 47 years of record
100 years
88.7 mm (3.5 in)
Longer than the 47 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, 47 years of values from 1959 to 2005.
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: 66.6 mm (2.6 in) in 2001; 66.4 mm (2.6 in) in 1967; 66.0 mm (2.6 in) in 1985.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Mietoinen Saari, at 1977. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1977 ran 0.1 C (0.2 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Mietoinen Saari, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1977
-0.1
-0.2
possible
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 Mietoinen Saari standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mietoinen Saari 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.