Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Simonstorp. 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 Simonstorp, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
9.1 C (48.4 F)
-29.4 C (-20.9 F)
n/a
n/a
Feb
11.6 C (52.9 F)
-36.1 C (-33.0 F)
n/a
n/a
Mar
16.6 C (61.9 F)
-27.9 C (-18.2 F)
n/a
n/a
Apr
26.9 C (80.4 F)
-15.5 C (4.1 F)
n/a
n/a
May
27.6 C (81.7 F)
-6.3 C (20.7 F)
n/a
n/a
Jun
30.8 C (87.4 F)
-1.8 C (28.8 F)
n/a
n/a
Jul
31.5 C (88.7 F)
0.7 C (33.3 F)
n/a
n/a
Aug
33.1 C (91.6 F)
-3.3 C (26.1 F)
n/a
n/a
Sep
25.6 C (78.1 F)
-7.6 C (18.3 F)
n/a
n/a
Oct
21.6 C (70.9 F)
-13.3 C (8.1 F)
n/a
n/a
Nov
12.2 C (54.0 F)
-21.3 C (-6.3 F)
n/a
n/a
Dec
9.9 C (49.8 F)
-26.7 C (-16.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Simonstorp still stand. 1989 holds the most, with 67.
Standing records at Simonstorp by the year they were set
Year set
Standing records
1960
20
1961
26
1962
23
1963
21
1964
32
1965
40
1966
38
1967
10
1968
36
1969
46
1970
24
1971
43
1972
19
1973
45
1974
31
1975
35
1976
29
1977
34
1978
49
1979
39
1980
23
1981
26
1982
37
1983
28
1984
20
1985
45
1986
38
1987
46
1988
28
1989
67
1990
40
1991
12
1992
32
1993
29
1994
31
1995
30
1996
33
1997
35
1998
35
1999
31
2000
43
2001
22
2002
45
2003
27
2004
21
All-Time Record Progression
4 new records
4 all-time records were set at Simonstorp between 30 July 1994 and 2 August 2002. Each dot is a new record.
When Simonstorp set new all-time records
Date
Kind
Detail
1994-07-30
Record high minimum temperature
Record high minimum temperature 18.0 C (64.4 F)
1997-06-09
Record daily precipitation
Record daily precipitation 63.2 mm (2.5 in)
1997-08-25
Record high minimum temperature
Record high minimum temperature 18.3 C (64.9 F)
2002-08-02
Record high minimum temperature
Record high minimum temperature 18.6 C (65.5 F)
Wettest Day of Each Month
Jun: 63.2 mm (2.5 in)
The wettest day on record for each calendar month at Simonstorp. The most was 63.2 mm (2.5 in) on 9 June 1997.
Record daily precipitation for each month at Simonstorp
Month
Record daily precipitation (mm)
Date
Jan
29.8 mm (1.2 in)
4 January 1998
Feb
30.2 mm (1.2 in)
7 February 1990
Mar
20.3 mm (0.8 in)
20 March 1977
Apr
42.2 mm (1.7 in)
18 April 1999
May
43.2 mm (1.7 in)
5 May 1996
Jun
63.2 mm (2.5 in)
9 June 1997
Jul
56.8 mm (2.2 in)
19 July 1988
Aug
57.2 mm (2.3 in)
7 August 1971
Sep
57.0 mm (2.2 in)
2 September 1988
Oct
42.4 mm (1.7 in)
22 October 2004
Nov
24.2 mm (1.0 in)
18 November 1981
Dec
28.1 mm (1.1 in)
5 December 1960
Period of Record Coverage
1959 to 2004
Complete yearUnder 90 percent of days
46 years of record at Simonstorp, 1959 to 2004. 1 years have data for under 90 percent of days and are left out of rankings: 1959.
Cooler than the station meanWarmer than the station mean
One stripe for each of 42 complete years at Simonstorp, 1960 to 2003. Blue stripes are years cooler than the station's own mean of 5.5 C (42.0 F); red stripes are warmer. The coolest year was 1985, at 3.7 C (38.6 F), and the warmest was 2000, at 7.6 C (45.6 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Simonstorp as warming stripes, 1960 to 2003
Year
Annual mean temperature
Difference from the station mean
1960
5.4 C
-0.14 C
1961
6.5 C
+0.96 C
1962
4.4 C
-1.09 C
1963
4.3 C
-1.25 C
1964
5.4 C
-0.13 C
1965
4.3 C
-1.25 C
1966
4.3 C
-1.27 C
1967
5.7 C
+0.20 C
1968
5.1 C
-0.43 C
1969
4.7 C
-0.85 C
1970
3.8 C
-1.69 C
1971
5.7 C
+0.19 C
1972
5.8 C
+0.25 C
1973
5.4 C
-0.18 C
1974
6.1 C
+0.57 C
1975
6.6 C
+1.02 C
1976
4.6 C
-0.95 C
1977
5.0 C
-0.54 C
1978
4.6 C
-0.89 C
1979
4.2 C
-1.34 C
1980
4.5 C
-1.04 C
1982
5.8 C
+0.25 C
1983
6.1 C
+0.58 C
1984
5.9 C
+0.34 C
1985
3.7 C
-1.88 C
1986
4.8 C
-0.75 C
1987
4.1 C
-1.48 C
1988
6.1 C
+0.57 C
1989
7.2 C
+1.69 C
1990
7.3 C
+1.79 C
1991
6.2 C
+0.68 C
1992
6.7 C
+1.17 C
1993
5.5 C
-0.01 C
1994
6.1 C
+0.56 C
1996
4.8 C
-0.71 C
1997
6.2 C
+0.64 C
1998
6.0 C
+0.43 C
1999
6.7 C
+1.14 C
2000
7.6 C
+2.02 C
2001
6.1 C
+0.52 C
2002
7.0 C
+1.43 C
2003
6.4 C
+0.85 C
The annual mean temperature here has risen by 0.4 C (0.2 to 0.6) per decade over 1960 to 2003. In Fahrenheit: 0.7 F (0.3 to 1.1) per decade. The slope is a straight line fitted to 42 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Simonstorp
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 1.1) per decade
1960 to 2003
42
Rise
Mean daily maximum
0.26 C (0.04 to 0.47) per decade
0.5 F (0.1 to 0.8) per decade
1960 to 2003
42
Rise
Mean daily minimum
0.5 C (0.3 to 0.8) per decade
0.9 F (0.5 to 1.4) per decade
1960 to 2003
42
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 2004
Yearly extremes at Simonstorp: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
33.1 C (91.6 F)
1975
28.1 C (82.6 F)
46
Coldest night (TNn)
-36.1 C (-33.0 F)
1966
-22.7 C (-9.0 F)
46
Wettest day (Rx1day)
63.2 mm (2.5 in)
1997
32.4 mm (1.3 in)
46
Wettest five days (Rx5day)
101.6 mm (4.0 in)
2004
60.1 mm (2.4 in)
46
Longest dry spell (CDD)
42 days
1974
21 days
46
Hottest day (TXx)
The hottest day of the year at Simonstorp, 1959 to 2004. The record is 33.1 C (91.6 F) in 1975, marked on the chart; the median year is 28.1 C (82.6 F).
Hottest day (TXx) at Simonstorp by year
Year
Hottest day (TXx)
1959
5.4 C (41.7 F)
1960
27.0 C (80.6 F)
1961
27.0 C (80.6 F)
1962
23.8 C (74.8 F)
1963
26.7 C (80.1 F)
1964
29.2 C (84.6 F)
1965
25.2 C (77.4 F)
1966
28.6 C (83.5 F)
1967
26.3 C (79.3 F)
1968
28.6 C (83.5 F)
1969
31.0 C (87.8 F)
1970
30.8 C (87.4 F)
1971
28.6 C (83.5 F)
1972
27.6 C (81.7 F)
1973
29.6 C (85.3 F)
1974
24.7 C (76.5 F)
1975
33.1 C (91.6 F)
1976
26.6 C (79.9 F)
1977
27.7 C (81.9 F)
1978
28.1 C (82.6 F)
1979
30.1 C (86.2 F)
1980
27.6 C (81.7 F)
1981
27.0 C (80.6 F)
1982
31.6 C (88.9 F)
1983
28.2 C (82.8 F)
1984
26.5 C (79.7 F)
1985
27.6 C (81.7 F)
1986
29.0 C (84.2 F)
1987
24.7 C (76.5 F)
1988
28.1 C (82.6 F)
1989
31.1 C (88.0 F)
1990
26.8 C (80.2 F)
1991
29.8 C (85.6 F)
1992
28.6 C (83.5 F)
1993
26.2 C (79.2 F)
1994
31.5 C (88.7 F)
1995
28.2 C (82.8 F)
1996
27.3 C (81.1 F)
1997
29.8 C (85.6 F)
1998
27.2 C (81.0 F)
1999
29.1 C (84.4 F)
2000
29.0 C (84.2 F)
2001
30.3 C (86.5 F)
2002
29.4 C (84.9 F)
2003
27.2 C (81.0 F)
2004
27.9 C (82.2 F)
Coldest night (TNn)
The coldest night of the year at Simonstorp, 1959 to 2004. The record is -36.1 C (-33.0 F) in 1966, marked on the chart; the median year is -22.7 C (-9.0 F).
Coldest night (TNn) at Simonstorp by year
Year
Coldest night (TNn)
1959
-8.0 C (17.6 F)
1960
-21.8 C (-7.2 F)
1961
-20.2 C (-4.4 F)
1962
-24.5 C (-12.1 F)
1963
-28.4 C (-19.1 F)
1964
-23.9 C (-11.0 F)
1965
-27.9 C (-18.2 F)
1966
-36.1 C (-33.0 F)
1967
-22.8 C (-9.0 F)
1968
-24.3 C (-11.7 F)
1969
-27.2 C (-17.0 F)
1970
-26.5 C (-15.7 F)
1971
-25.0 C (-13.0 F)
1972
-15.6 C (3.9 F)
1973
-22.6 C (-8.7 F)
1974
-11.9 C (10.6 F)
1975
-15.5 C (4.1 F)
1976
-23.1 C (-9.6 F)
1977
-24.0 C (-11.2 F)
1978
-27.4 C (-17.3 F)
1979
-27.0 C (-16.6 F)
1980
-24.1 C (-11.4 F)
1981
-22.1 C (-7.8 F)
1982
-28.0 C (-18.4 F)
1983
-19.4 C (-2.9 F)
1984
-20.8 C (-5.4 F)
1985
-31.9 C (-25.4 F)
1986
-25.5 C (-13.9 F)
1987
-29.4 C (-20.9 F)
1988
-21.6 C (-6.9 F)
1989
-20.2 C (-4.4 F)
1990
-15.8 C (3.6 F)
1991
-18.4 C (-1.1 F)
1992
-15.1 C (4.8 F)
1993
-20.3 C (-4.5 F)
1994
-22.4 C (-8.3 F)
1995
-20.2 C (-4.4 F)
1996
-26.7 C (-16.1 F)
1997
-25.8 C (-14.4 F)
1998
-18.4 C (-1.1 F)
1999
-20.6 C (-5.1 F)
2000
-17.1 C (1.2 F)
2001
-21.0 C (-5.8 F)
2002
-24.5 C (-12.1 F)
2003
-24.6 C (-12.3 F)
2004
-22.7 C (-8.9 F)
Wettest day (Rx1day)
The wettest day of the year at Simonstorp, 1959 to 2004. The record is 63.2 mm (2.5 in) in 1997, marked on the chart; the median year is 32.4 mm (1.3 in).
Wettest day (Rx1day) at Simonstorp by year
Year
Wettest day (Rx1day)
1959
6.2 mm (0.24 in)
1960
40.3 mm (1.6 in)
1961
24.0 mm (0.9 in)
1962
38.5 mm (1.5 in)
1963
39.7 mm (1.6 in)
1964
36.5 mm (1.4 in)
1965
30.4 mm (1.2 in)
1966
16.2 mm (0.6 in)
1967
42.2 mm (1.7 in)
1968
38.2 mm (1.5 in)
1969
21.9 mm (0.9 in)
1970
21.4 mm (0.8 in)
1971
57.2 mm (2.3 in)
1972
30.9 mm (1.2 in)
1973
55.2 mm (2.2 in)
1974
24.9 mm (1.0 in)
1975
20.7 mm (0.8 in)
1976
26.4 mm (1.0 in)
1977
31.8 mm (1.3 in)
1978
38.2 mm (1.5 in)
1979
43.1 mm (1.7 in)
1980
26.1 mm (1.0 in)
1981
26.3 mm (1.0 in)
1982
22.4 mm (0.9 in)
1983
38.2 mm (1.5 in)
1984
34.9 mm (1.4 in)
1985
33.4 mm (1.3 in)
1986
16.6 mm (0.7 in)
1987
61.9 mm (2.4 in)
1988
57.0 mm (2.2 in)
1989
19.5 mm (0.8 in)
1990
31.2 mm (1.2 in)
1991
22.6 mm (0.9 in)
1992
27.9 mm (1.1 in)
1993
55.7 mm (2.2 in)
1994
22.1 mm (0.9 in)
1995
29.3 mm (1.2 in)
1996
43.2 mm (1.7 in)
1997
63.2 mm (2.5 in)
1998
33.8 mm (1.3 in)
1999
42.2 mm (1.7 in)
2000
42.6 mm (1.7 in)
2001
20.3 mm (0.8 in)
2002
32.2 mm (1.3 in)
2003
32.6 mm (1.3 in)
2004
51.3 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Simonstorp, 1959 to 2004. The record is 101.6 mm (4.0 in) in 2004, marked on the chart; the median year is 60.1 mm (2.4 in).
Wettest five days (Rx5day) at Simonstorp by year
Year
Wettest five days (Rx5day)
1959
10.3 mm (0.4 in)
1960
63.3 mm (2.5 in)
1961
42.2 mm (1.7 in)
1962
47.5 mm (1.9 in)
1963
51.5 mm (2.0 in)
1964
67.5 mm (2.7 in)
1965
72.1 mm (2.8 in)
1966
33.0 mm (1.3 in)
1967
77.3 mm (3.0 in)
1968
84.1 mm (3.3 in)
1969
51.0 mm (2.0 in)
1970
62.4 mm (2.5 in)
1971
86.2 mm (3.4 in)
1972
55.9 mm (2.2 in)
1973
63.9 mm (2.5 in)
1974
53.9 mm (2.1 in)
1975
47.0 mm (1.9 in)
1976
40.9 mm (1.6 in)
1977
58.1 mm (2.3 in)
1978
65.3 mm (2.6 in)
1979
90.7 mm (3.6 in)
1980
46.8 mm (1.8 in)
1981
62.0 mm (2.4 in)
1982
51.0 mm (2.0 in)
1983
55.0 mm (2.2 in)
1984
48.7 mm (1.9 in)
1985
62.9 mm (2.5 in)
1986
46.0 mm (1.8 in)
1987
94.5 mm (3.7 in)
1988
98.6 mm (3.9 in)
1989
36.7 mm (1.4 in)
1990
72.8 mm (2.9 in)
1991
54.0 mm (2.1 in)
1992
53.4 mm (2.1 in)
1993
77.5 mm (3.1 in)
1994
43.9 mm (1.7 in)
1995
45.6 mm (1.8 in)
1996
71.7 mm (2.8 in)
1997
63.2 mm (2.5 in)
1998
78.9 mm (3.1 in)
1999
58.5 mm (2.3 in)
2000
78.0 mm (3.1 in)
2001
51.4 mm (2.0 in)
2002
62.9 mm (2.5 in)
2003
61.6 mm (2.4 in)
2004
101.6 mm (4.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Simonstorp, 1959 to 2004. The record is 42 days in 1974, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Simonstorp by year
Year
Longest dry spell (CDD)
1959
7 days
1960
27 days
1961
18 days
1962
14 days
1963
19 days
1964
39 days
1965
24 days
1966
17 days
1967
15 days
1968
18 days
1969
24 days
1970
16 days
1971
16 days
1972
24 days
1973
15 days
1974
42 days
1975
36 days
1976
25 days
1977
22 days
1978
18 days
1979
17 days
1980
23 days
1981
21 days
1982
27 days
1983
21 days
1984
24 days
1985
20 days
1986
24 days
1987
28 days
1988
13 days
1989
20 days
1990
17 days
1991
30 days
1992
36 days
1993
21 days
1994
19 days
1995
29 days
1996
30 days
1997
21 days
1998
22 days
1999
16 days
2000
19 days
2001
14 days
2002
35 days
2003
34 days
2004
14 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
42 years with a frost
Across 42 years with a frost, the median last spring frost at Simonstorp falls on 24 May and the median first autumn frost on 14 September, which leaves a median of 115 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 Simonstorp
Measure
Median, all years
Earliest period
Recent period (1972 to 2003)
Recent against earliest
Fitted trend
Last spring frost
24 May
n/a
24 May
n/a
-1.0 days per decade
First autumn frost
14 September
n/a
10 September
n/a
-0.8 days per decade
Growing days
115 days
n/a
116 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
45 years, 1960 to 2004
A day with at least 32.8 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 73.9 mm (2.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Simonstorp: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
32.8 mm (1.3 in)
5 years
44.3 mm (1.7 in)
10 years
51.7 mm (2.0 in)
25 years
60.8 mm (2.4 in)
50 years
67.4 mm (2.7 in)
Longer than the 45 years of record
100 years
73.9 mm (2.9 in)
Longer than the 45 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, 45 years of values from 1960 to 2004.
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: 63.2 mm (2.5 in) in 1997; 61.9 mm (2.4 in) in 1987; 57.2 mm (2.3 in) in 1971.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Simonstorp, at 1973 and 1987. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1973 ran 0.1 C (0.1 F) lower than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1987 ran 0.2 C (0.3 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Simonstorp, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1973
-0.1
-0.1
possible
5
1987
+0.2
+0.3
likely
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 Simonstorp standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Simonstorp 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.