Understen Weather Records (SWE00139308)

Record envelope, standing records and threshold days for Understen (SWE00139308), Sweden, with 44 years of record.

Key Facts for Understen

Understen (SWE00139308) is a weather station in Sweden at 60.28 latitude and 18.92 longitude, 12 m (39 ft) above sea level.
The station reports from 1949 to 1992, 44 years of record.
1,464 records set at Understen still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Sweden, 60.28 latitude, 18.92 longitude.
Elevation: 12 m (39 ft).
Period of record: 1949 to 1992, 44 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Understen. 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 Understen, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	9.0 C (48.2 F)	-20.4 C (-4.7 F)	n/a	n/a
Feb	9.8 C (49.6 F)	-24.4 C (-11.9 F)	n/a	n/a
Mar	11.2 C (52.2 F)	-17.4 C (0.7 F)	n/a	n/a
Apr	17.9 C (64.2 F)	-12.0 C (10.4 F)	n/a	n/a
May	22.8 C (73.0 F)	-4.0 C (24.8 F)	n/a	n/a
Jun	24.0 C (75.2 F)	3.2 C (37.8 F)	n/a	n/a
Jul	27.4 C (81.3 F)	7.6 C (45.7 F)	n/a	n/a
Aug	26.8 C (80.2 F)	7.0 C (44.6 F)	n/a	n/a
Sep	23.2 C (73.8 F)	2.7 C (36.9 F)	n/a	n/a
Oct	15.8 C (60.4 F)	-2.8 C (27.0 F)	n/a	n/a
Nov	10.3 C (50.5 F)	-11.2 C (11.8 F)	n/a	n/a
Dec	9.8 C (49.6 F)	-12.4 C (9.7 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Understen still stand. 1966 holds the most, with 150.

Standing records at Understen by the year they were set
Year set	Standing records
1951	45
1952	74
1953	49
1954	19
1955	107
1956	81
1957	64
1958	72
1959	82
1960	47
1961	87
1962	45
1963	27
1964	43
1965	43
1966	150
1967	43
1968	87
1988	10
1989	73
1990	89
1991	58
1992	69

Wettest Day of Each Month

Jul: 105.6 mm (4.2 in)

The wettest day on record for each calendar month at Understen. The most was 105.6 mm (4.2 in) on 28 July 1992.

Record daily precipitation for each month at Understen
Month	Record daily precipitation (mm)	Date
Jan	38.0 mm (1.5 in)	9 January 1954
Feb	16.0 mm (0.6 in)	16 February 1962
Mar	20.3 mm (0.8 in)	23 March 1951
Apr	22.0 mm (0.9 in)	17 April 1967
May	27.6 mm (1.1 in)	17 May 1958
Jun	37.1 mm (1.5 in)	15 June 1961
Jul	105.6 mm (4.2 in)	28 July 1992
Aug	30.4 mm (1.2 in)	9 August 1963
Sep	44.2 mm (1.7 in)	6 September 1963
Oct	37.1 mm (1.5 in)	17 October 1967
Nov	20.2 mm (0.8 in)	6 November 1954
Dec	21.3 mm (0.8 in)	17 December 1955

Period of Record Coverage

1951 to 1992

23 years of record at Understen, 1951 to 1992. 2 years have data for under 90 percent of days and are left out of rankings: 1988, 1992.

Days with data per year at Understen
Year	Days with data	Share of year	Complete
1951	365	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	335	92%	Yes
1988	31	8%	No
1989	364	100%	Yes
1990	365	100%	Yes
1991	332	91%	Yes
1992	227	62%	No

Latest Records

No records were set at this station in the latest data.

Climate Trend

19 complete years, 1951 to 1990

One stripe for each of 19 complete years at Understen, 1951 to 1990. Blue stripes are years cooler than the station's own mean of 5.5 C (41.9 F); red stripes are warmer. The coolest year was 1956, at 3.6 C (38.4 F), and the warmest was 1990, at 7.1 C (44.7 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at Understen as warming stripes, 1951 to 1990
Year	Annual mean temperature	Difference from the station mean
1951	5.7 C	+0.14 C
1952	4.9 C	-0.62 C
1953	6.5 C	+0.93 C
1954	5.4 C	-0.16 C
1955	4.7 C	-0.82 C
1956	3.6 C	-1.95 C
1957	5.4 C	-0.14 C
1958	4.5 C	-1.04 C
1959	6.8 C	+1.26 C
1960	5.9 C	+0.36 C
1961	6.8 C	+1.31 C
1962	5.2 C	-0.28 C
1963	5.0 C	-0.54 C
1964	5.5 C	-0.03 C
1965	5.3 C	-0.20 C
1966	3.8 C	-1.69 C
1967	6.0 C	+0.51 C
1989	7.0 C	+1.46 C
1990	7.1 C	+1.56 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1949 to 1992

Yearly extremes at Understen: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	27.4 C (81.3 F)	1955	23.0 C (73.4 F)	23
Coldest night (TNn)	-24.4 C (-11.9 F)	1966	-14.2 C (6.4 F)	23
Wettest day (Rx1day)	105.6 mm (4.2 in)	1992	25.5 mm (1.0 in)	25
Wettest five days (Rx5day)	111.5 mm (4.4 in)	1992	47.0 mm (1.9 in)	25
Longest dry spell (CDD)	49 days	1955	23 days	25

Hottest day (TXx)

The hottest day of the year at Understen, 1949 to 1992. The record is 27.4 C (81.3 F) in 1955, marked on the chart; the median year is 23.0 C (73.4 F).

Hottest day (TXx) at Understen by year
Year	Hottest day (TXx)
1949	n/a
1950	n/a
1951	21.6 C (70.9 F)
1952	22.0 C (71.6 F)
1953	23.5 C (74.3 F)
1954	23.0 C (73.4 F)
1955	27.4 C (81.3 F)
1956	21.0 C (69.8 F)
1957	22.0 C (71.6 F)
1958	23.0 C (73.4 F)
1959	26.8 C (80.2 F)
1960	21.9 C (71.4 F)
1961	24.0 C (75.2 F)
1962	20.9 C (69.6 F)
1963	23.0 C (73.4 F)
1964	21.3 C (70.3 F)
1965	20.8 C (69.4 F)
1966	24.6 C (76.3 F)
1967	24.8 C (76.6 F)
1968	24.0 C (75.2 F)
1988	4.9 C (40.8 F)
1989	22.8 C (73.0 F)
1990	23.3 C (73.9 F)
1991	26.3 C (79.3 F)
1992	24.4 C (75.9 F)

Coldest night (TNn)

The coldest night of the year at Understen, 1949 to 1992. The record is -24.4 C (-11.9 F) in 1966, marked on the chart; the median year is -14.2 C (6.4 F).

Coldest night (TNn) at Understen by year
Year	Coldest night (TNn)
1949	n/a
1950	n/a
1951	-12.2 C (10.0 F)
1952	-10.9 C (12.4 F)
1953	-14.2 C (6.4 F)
1954	-14.8 C (5.4 F)
1955	-14.2 C (6.4 F)
1956	-23.8 C (-10.8 F)
1957	-16.4 C (2.5 F)
1958	-18.0 C (-0.4 F)
1959	-10.5 C (13.1 F)
1960	-13.0 C (8.6 F)
1961	-12.1 C (10.2 F)
1962	-10.7 C (12.7 F)
1963	-17.4 C (0.7 F)
1964	-15.1 C (4.8 F)
1965	-15.2 C (4.6 F)
1966	-24.4 C (-11.9 F)
1967	-15.1 C (4.8 F)
1968	-17.8 C (0.0 F)
1988	-11.7 C (10.9 F)
1989	-12.4 C (9.7 F)
1990	-8.0 C (17.6 F)
1991	-7.9 C (17.8 F)
1992	-5.2 C (22.6 F)

Wettest day (Rx1day)

The wettest day of the year at Understen, 1949 to 1992. The record is 105.6 mm (4.2 in) in 1992, marked on the chart; the median year is 25.5 mm (1.0 in).

Wettest day (Rx1day) at Understen by year
Year	Wettest day (Rx1day)
1949	27.5 mm (1.1 in)
1950	16.7 mm (0.7 in)
1951	20.3 mm (0.8 in)
1952	21.2 mm (0.8 in)
1953	28.0 mm (1.1 in)
1954	38.0 mm (1.5 in)
1955	23.5 mm (0.9 in)
1956	18.2 mm (0.7 in)
1957	19.9 mm (0.8 in)
1958	27.6 mm (1.1 in)
1959	28.1 mm (1.1 in)
1960	25.5 mm (1.0 in)
1961	37.1 mm (1.5 in)
1962	17.3 mm (0.7 in)
1963	44.2 mm (1.7 in)
1964	15.6 mm (0.6 in)
1965	23.9 mm (0.9 in)
1966	17.1 mm (0.7 in)
1967	37.1 mm (1.5 in)
1968	36.7 mm (1.4 in)
1988	15.0 mm (0.6 in)
1989	29.0 mm (1.1 in)
1990	27.5 mm (1.1 in)
1991	20.6 mm (0.8 in)
1992	105.6 mm (4.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Understen, 1949 to 1992. The record is 111.5 mm (4.4 in) in 1992, marked on the chart; the median year is 47.0 mm (1.9 in).

Wettest five days (Rx5day) at Understen by year
Year	Wettest five days (Rx5day)
1949	53.9 mm (2.1 in)
1950	36.0 mm (1.4 in)
1951	35.3 mm (1.4 in)
1952	33.6 mm (1.3 in)
1953	53.5 mm (2.1 in)
1954	46.0 mm (1.8 in)
1955	57.4 mm (2.3 in)
1956	51.0 mm (2.0 in)
1957	41.9 mm (1.6 in)
1958	41.4 mm (1.6 in)
1959	51.3 mm (2.0 in)
1960	63.3 mm (2.5 in)
1961	67.0 mm (2.6 in)
1962	39.9 mm (1.6 in)
1963	55.4 mm (2.2 in)
1964	39.6 mm (1.6 in)
1965	53.3 mm (2.1 in)
1966	47.0 mm (1.9 in)
1967	45.5 mm (1.8 in)
1968	47.3 mm (1.9 in)
1988	22.7 mm (0.9 in)
1989	42.3 mm (1.7 in)
1990	68.1 mm (2.7 in)
1991	27.9 mm (1.1 in)
1992	111.5 mm (4.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Understen, 1949 to 1992. The record is 49 days in 1955, marked on the chart; the median year is 23 days.

Longest dry spell (CDD) at Understen by year
Year	Longest dry spell (CDD)
1949	20 days
1950	28 days
1951	36 days
1952	13 days
1953	20 days
1954	22 days
1955	49 days
1956	34 days
1957	20 days
1958	17 days
1959	25 days
1960	39 days
1961	31 days
1962	22 days
1963	23 days
1964	41 days
1965	30 days
1966	19 days
1967	42 days
1968	33 days
1988	4 days
1989	20 days
1990	16 days
1991	32 days
1992	20 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.

Download the Data

Data for Understen standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Understen 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.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).