Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Nassjo. 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 Nassjo, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
8.7 C (47.7 F)
-28.2 C (-18.8 F)
n/a
n/a
Feb
12.2 C (54.0 F)
-27.7 C (-17.9 F)
n/a
n/a
Mar
18.0 C (64.4 F)
-24.9 C (-12.8 F)
n/a
n/a
Apr
26.0 C (78.8 F)
-14.0 C (6.8 F)
n/a
n/a
May
29.0 C (84.2 F)
-5.0 C (23.0 F)
n/a
n/a
Jun
37.0 C (98.6 F)
-1.4 C (29.5 F)
n/a
n/a
Jul
33.5 C (92.3 F)
2.2 C (36.0 F)
n/a
n/a
Aug
34.4 C (93.9 F)
0.0 C (32.0 F)
n/a
n/a
Sep
26.2 C (79.2 F)
-5.6 C (21.9 F)
n/a
n/a
Oct
21.0 C (69.8 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
12.5 C (54.5 F)
-17.0 C (1.4 F)
n/a
n/a
Dec
9.1 C (48.4 F)
-23.2 C (-9.8 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Nassjo still stand. 1947 holds the most, with 81.
Standing records at Nassjo by the year they were set
Year set
Standing records
1945
27
1946
24
1947
81
1948
45
1949
17
1961
32
1962
23
1963
18
1964
22
1965
33
1966
36
1967
21
1968
69
1969
46
1970
40
1971
50
1972
27
1973
40
1974
21
1975
41
1976
33
1977
38
1978
48
1979
42
1980
31
1981
32
1982
35
1983
30
1984
16
1985
41
1986
30
1987
52
1988
33
1989
76
1990
48
1991
19
1992
38
1993
39
1994
28
1995
42
All-Time Record Progression
2 new records
2 all-time records were set at Nassjo between 10 January 1987 and 10 January 1987. Each dot is a new record.
When Nassjo set new all-time records
Date
Kind
Detail
1987-01-10
Record low maximum temperature
Record low maximum temperature -23.7 C (-10.7 F)
1987-01-10
Record low minimum temperature
Record low minimum temperature -28.2 C (-18.8 F)
Wettest Day of Each Month
Aug: 46.2 mm (1.8 in)
The wettest day on record for each calendar month at Nassjo. The most was 46.2 mm (1.8 in) on 17 August 1945.
Record daily precipitation for each month at Nassjo
Month
Record daily precipitation (mm)
Date
Jan
21.6 mm (0.9 in)
3 January 1992
Feb
31.8 mm (1.3 in)
7 February 1990
Mar
21.2 mm (0.8 in)
20 March 1974
Apr
23.6 mm (0.9 in)
28 April 1945
May
37.2 mm (1.5 in)
27 May 1976
Jun
39.4 mm (1.6 in)
28 June 1966
Jul
40.0 mm (1.6 in)
26 July 1972
Aug
46.2 mm (1.8 in)
17 August 1945
Sep
39.9 mm (1.6 in)
30 September 1990
Oct
42.3 mm (1.7 in)
13 October 1964
Nov
26.7 mm (1.1 in)
1 November 1965
Dec
27.8 mm (1.1 in)
23 December 1967
Period of Record Coverage
1945 to 1996
Complete yearUnder 90 percent of days
41 years of record at Nassjo, 1945 to 1996. 3 years have data for under 90 percent of days and are left out of rankings: 1949, 1986, 1996.
Cooler than the station meanWarmer than the station mean
One stripe for each of 38 complete years at Nassjo, 1945 to 1995. Blue stripes are years cooler than the station's own mean of 5.4 C (41.8 F); red stripes are warmer. The coolest year was 1987, at 3.9 C (39.0 F), and the warmest was 1990, at 7.2 C (45.0 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Nassjo as warming stripes, 1945 to 1995
Year
Annual mean temperature
Difference from the station mean
1945
5.9 C
+0.48 C
1946
5.4 C
-0.07 C
1947
4.7 C
-0.71 C
1948
6.1 C
+0.65 C
1961
6.5 C
+1.07 C
1962
4.6 C
-0.86 C
1963
4.8 C
-0.64 C
1964
5.8 C
+0.33 C
1965
4.7 C
-0.76 C
1966
4.7 C
-0.73 C
1967
5.7 C
+0.22 C
1968
4.9 C
-0.49 C
1969
4.6 C
-0.87 C
1970
3.9 C
-1.55 C
1971
5.7 C
+0.24 C
1972
5.7 C
+0.29 C
1973
5.6 C
+0.19 C
1974
6.0 C
+0.61 C
1975
6.6 C
+1.20 C
1976
4.8 C
-0.65 C
1977
5.1 C
-0.31 C
1978
4.7 C
-0.69 C
1979
4.5 C
-0.95 C
1980
4.5 C
-0.97 C
1981
4.7 C
-0.73 C
1982
5.9 C
+0.45 C
1983
6.2 C
+0.79 C
1984
5.9 C
+0.51 C
1985
3.9 C
-1.53 C
1987
3.9 C
-1.56 C
1988
5.9 C
+0.45 C
1989
7.2 C
+1.76 C
1990
7.2 C
+1.78 C
1991
6.1 C
+0.62 C
1992
6.6 C
+1.19 C
1993
5.5 C
+0.06 C
1994
6.1 C
+0.63 C
1995
5.8 C
+0.41 C
The fitted trend in annual mean temperature here over 1945 to 1995 is 0.1 C (-0.1 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.2 to 0.6) per decade. The slope is a straight line fitted to 38 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Nassjo
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.3) per decade
0.2 F (-0.2 to 0.6) per decade
1945 to 1995
38
Not clearly different from zero
Mean daily maximum
0.00 C (-0.24 to 0.23) per decade
-0.01 F (-0.42 to 0.41) per decade
1945 to 1995
38
Not clearly different from zero
Mean daily minimum
0.26 C (0.03 to 0.48) per decade
0.5 F (0.1 to 0.9) per decade
1945 to 1995
38
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
1945 to 1996
Yearly extremes at Nassjo: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.0 C (98.6 F)
1947
28.2 C (82.8 F)
41
Coldest night (TNn)
-28.2 C (-18.8 F)
1987
-20.9 C (-5.6 F)
41
Wettest day (Rx1day)
46.2 mm (1.8 in)
1945
29.1 mm (1.1 in)
41
Wettest five days (Rx5day)
88.5 mm (3.5 in)
1961
57.7 mm (2.3 in)
41
Longest dry spell (CDD)
36 days
1992
20 days
41
Hottest day (TXx)
The hottest day of the year at Nassjo, 1945 to 1996. The record is 37.0 C (98.6 F) in 1947, marked on the chart; the median year is 28.2 C (82.8 F).
Hottest day (TXx) at Nassjo by year
Year
Hottest day (TXx)
1945
33.5 C (92.3 F)
1946
31.0 C (87.8 F)
1947
37.0 C (98.6 F)
1948
32.0 C (89.6 F)
1949
25.0 C (77.0 F)
1961
27.0 C (80.6 F)
1962
23.5 C (74.3 F)
1963
27.2 C (81.0 F)
1964
29.6 C (85.3 F)
1965
24.8 C (76.6 F)
1966
27.2 C (81.0 F)
1967
25.8 C (78.4 F)
1968
29.3 C (84.7 F)
1969
29.5 C (85.1 F)
1970
30.0 C (86.0 F)
1971
28.8 C (83.8 F)
1972
28.2 C (82.8 F)
1973
28.5 C (83.3 F)
1974
23.9 C (75.0 F)
1975
32.6 C (90.7 F)
1976
28.0 C (82.4 F)
1977
27.8 C (82.0 F)
1978
27.5 C (81.5 F)
1979
29.6 C (85.3 F)
1980
27.3 C (81.1 F)
1981
26.1 C (79.0 F)
1982
30.2 C (86.4 F)
1983
30.4 C (86.7 F)
1984
26.5 C (79.7 F)
1985
27.2 C (81.0 F)
1986
28.9 C (84.0 F)
1987
24.4 C (75.9 F)
1988
27.0 C (80.6 F)
1989
31.3 C (88.3 F)
1990
27.7 C (81.9 F)
1991
30.5 C (86.9 F)
1992
34.4 C (93.9 F)
1993
26.0 C (78.8 F)
1994
32.2 C (90.0 F)
1995
28.2 C (82.8 F)
1996
1.1 C (34.0 F)
Coldest night (TNn)
The coldest night of the year at Nassjo, 1945 to 1996. The record is -28.2 C (-18.8 F) in 1987, marked on the chart; the median year is -20.9 C (-5.6 F).
Coldest night (TNn) at Nassjo by year
Year
Coldest night (TNn)
1945
-15.0 C (5.0 F)
1946
-24.5 C (-12.1 F)
1947
-26.0 C (-14.8 F)
1948
-23.0 C (-9.4 F)
1949
-16.0 C (3.2 F)
1961
-16.0 C (3.2 F)
1962
-18.0 C (-0.4 F)
1963
-20.8 C (-5.4 F)
1964
-16.3 C (2.7 F)
1965
-20.9 C (-5.6 F)
1966
-24.6 C (-12.3 F)
1967
-21.5 C (-6.7 F)
1968
-24.9 C (-12.8 F)
1969
-27.7 C (-17.9 F)
1970
-25.2 C (-13.4 F)
1971
-21.3 C (-6.3 F)
1972
-15.1 C (4.8 F)
1973
-17.1 C (1.2 F)
1974
-11.1 C (12.0 F)
1975
-14.0 C (6.8 F)
1976
-18.6 C (-1.5 F)
1977
-18.5 C (-1.3 F)
1978
-23.9 C (-11.0 F)
1979
-22.2 C (-8.0 F)
1980
-22.1 C (-7.8 F)
1981
-21.9 C (-7.4 F)
1982
-21.8 C (-7.2 F)
1983
-17.4 C (0.7 F)
1984
-20.7 C (-5.3 F)
1985
-24.7 C (-12.5 F)
1986
-23.0 C (-9.4 F)
1987
-28.2 C (-18.8 F)
1988
-23.2 C (-9.8 F)
1989
-21.2 C (-6.2 F)
1990
-12.7 C (9.1 F)
1991
-13.2 C (8.2 F)
1992
-12.1 C (10.2 F)
1993
-15.6 C (3.9 F)
1994
-21.8 C (-7.2 F)
1995
-18.6 C (-1.5 F)
1996
-18.8 C (-1.8 F)
Wettest day (Rx1day)
The wettest day of the year at Nassjo, 1945 to 1996. The record is 46.2 mm (1.8 in) in 1945, marked on the chart; the median year is 29.1 mm (1.1 in).
Wettest day (Rx1day) at Nassjo by year
Year
Wettest day (Rx1day)
1945
46.2 mm (1.8 in)
1946
39.2 mm (1.5 in)
1947
27.3 mm (1.1 in)
1948
31.0 mm (1.2 in)
1949
20.3 mm (0.8 in)
1961
31.9 mm (1.3 in)
1962
27.4 mm (1.1 in)
1963
23.3 mm (0.9 in)
1964
42.3 mm (1.7 in)
1965
26.8 mm (1.1 in)
1966
39.4 mm (1.6 in)
1967
42.0 mm (1.7 in)
1968
25.0 mm (1.0 in)
1969
35.8 mm (1.4 in)
1970
28.9 mm (1.1 in)
1971
21.0 mm (0.8 in)
1972
40.0 mm (1.6 in)
1973
29.0 mm (1.1 in)
1974
29.1 mm (1.1 in)
1975
32.8 mm (1.3 in)
1976
37.2 mm (1.5 in)
1977
31.0 mm (1.2 in)
1978
37.4 mm (1.5 in)
1979
32.6 mm (1.3 in)
1980
31.2 mm (1.2 in)
1981
23.6 mm (0.9 in)
1982
24.6 mm (1.0 in)
1983
18.5 mm (0.7 in)
1984
38.5 mm (1.5 in)
1985
23.2 mm (0.9 in)
1986
26.9 mm (1.1 in)
1987
38.0 mm (1.5 in)
1988
38.5 mm (1.5 in)
1989
20.2 mm (0.8 in)
1990
39.9 mm (1.6 in)
1991
39.0 mm (1.5 in)
1992
21.6 mm (0.9 in)
1993
28.0 mm (1.1 in)
1994
28.5 mm (1.1 in)
1995
25.2 mm (1.0 in)
1996
2.4 mm (0.09 in)
Wettest five days (Rx5day)
The wettest five days of the year at Nassjo, 1945 to 1996. The record is 88.5 mm (3.5 in) in 1961, marked on the chart; the median year is 57.7 mm (2.3 in).
Wettest five days (Rx5day) at Nassjo by year
Year
Wettest five days (Rx5day)
1945
72.3 mm (2.8 in)
1946
57.7 mm (2.3 in)
1947
59.3 mm (2.3 in)
1948
59.0 mm (2.3 in)
1949
46.6 mm (1.8 in)
1961
88.5 mm (3.5 in)
1962
53.6 mm (2.1 in)
1963
48.4 mm (1.9 in)
1964
65.7 mm (2.6 in)
1965
69.4 mm (2.7 in)
1966
51.9 mm (2.0 in)
1967
61.1 mm (2.4 in)
1968
44.9 mm (1.8 in)
1969
65.1 mm (2.6 in)
1970
53.2 mm (2.1 in)
1971
50.5 mm (2.0 in)
1972
49.1 mm (1.9 in)
1973
60.8 mm (2.4 in)
1974
61.1 mm (2.4 in)
1975
63.9 mm (2.5 in)
1976
46.6 mm (1.8 in)
1977
53.2 mm (2.1 in)
1978
63.4 mm (2.5 in)
1979
49.4 mm (1.9 in)
1980
61.6 mm (2.4 in)
1981
52.6 mm (2.1 in)
1982
59.8 mm (2.4 in)
1983
35.9 mm (1.4 in)
1984
66.8 mm (2.6 in)
1985
59.5 mm (2.3 in)
1986
52.7 mm (2.1 in)
1987
67.1 mm (2.6 in)
1988
56.3 mm (2.2 in)
1989
32.2 mm (1.3 in)
1990
53.3 mm (2.1 in)
1991
65.3 mm (2.6 in)
1992
43.9 mm (1.7 in)
1993
74.7 mm (2.9 in)
1994
54.6 mm (2.1 in)
1995
61.3 mm (2.4 in)
1996
3.1 mm (0.12 in)
Longest dry spell (CDD)
The longest dry spell of the year at Nassjo, 1945 to 1996. The record is 36 days in 1992, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Nassjo by year
Year
Longest dry spell (CDD)
1945
14 days
1946
24 days
1947
31 days
1948
29 days
1949
20 days
1961
18 days
1962
27 days
1963
19 days
1964
30 days
1965
27 days
1966
16 days
1967
14 days
1968
19 days
1969
21 days
1970
13 days
1971
16 days
1972
19 days
1973
15 days
1974
24 days
1975
29 days
1976
19 days
1977
21 days
1978
17 days
1979
18 days
1980
19 days
1981
22 days
1982
34 days
1983
24 days
1984
24 days
1985
19 days
1986
26 days
1987
28 days
1988
14 days
1989
27 days
1990
16 days
1991
27 days
1992
36 days
1993
24 days
1994
20 days
1995
11 days
1996
15 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
38 years with a frost
Across 38 years with a frost, the median last spring frost at Nassjo falls on 17 May and the median first autumn frost on 30 September, which leaves a median of 136 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 Nassjo
Measure
Median, all years
Earliest period
Recent period (1965 to 1995)
Recent against earliest
Fitted trend
Last spring frost
17 May
n/a
17 May
n/a
+0.3 days per decade
First autumn frost
30 September
n/a
29 September
n/a
0.0 days per decade
Growing days
136 days
n/a
134 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
38 years, 1945 to 1995
A day with at least 31.3 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 48.6 mm (1.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Nassjo: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
31.3 mm (1.2 in)
5 years
37.8 mm (1.5 in)
10 years
41.2 mm (1.6 in)
25 years
44.7 mm (1.8 in)
50 years
46.8 mm (1.8 in)
Longer than the 38 years of record
100 years
48.6 mm (1.9 in)
Longer than the 38 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, 38 years of values from 1945 to 1995.
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: 46.2 mm (1.8 in) in 1945; 42.3 mm (1.7 in) in 1964; 42.0 mm (1.7 in) in 1967.
Download the Data
Data for Nassjo standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Nassjo 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.