Hallviken Weather Records (SWE00140148)

Record envelope, standing records and threshold days for Hallviken (SWE00140148), Sweden, with 32 years of record.

Key Facts for Hallviken

Hallviken (SWE00140148) is a weather station in Sweden at 63.73 latitude and 15.50 longitude, 375 m (1,230 ft) above sea level.
The station reports from 1947 to 1978, 32 years of record.
1,464 records set at Hallviken still stand.
Records are tracked for prcp, snwd: an element needs 30 years of data to be eligible.

About the Station

Location: Sweden, 63.73 latitude, 15.50 longitude.
Elevation: 375 m (1,230 ft).
Period of record: 1947 to 1978, 32 years.
Eligible elements: prcp, snwd.

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 Hallviken. 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 Hallviken, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	9.6 C (49.3 F)	-36.8 C (-34.2 F)	n/a	n/a
Feb	8.4 C (47.1 F)	-39.5 C (-39.1 F)	n/a	n/a
Mar	12.2 C (54.0 F)	-32.4 C (-26.3 F)	n/a	n/a
Apr	17.4 C (63.3 F)	-21.4 C (-6.5 F)	n/a	n/a
May	27.0 C (80.6 F)	-8.5 C (16.7 F)	n/a	n/a
Jun	29.2 C (84.6 F)	-6.2 C (20.8 F)	n/a	n/a
Jul	30.4 C (86.7 F)	-3.2 C (26.2 F)	n/a	n/a
Aug	29.0 C (84.2 F)	-3.0 C (26.6 F)	n/a	n/a
Sep	24.0 C (75.2 F)	-9.5 C (14.9 F)	n/a	n/a
Oct	15.4 C (59.7 F)	-19.0 C (-2.2 F)	n/a	n/a
Nov	10.4 C (50.7 F)	-29.8 C (-21.6 F)	n/a	n/a
Dec	7.0 C (44.6 F)	-38.8 C (-37.8 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Hallviken still stand. 1955 holds the most, with 92.

Standing records at Hallviken by the year they were set
Year set	Standing records
1953	54
1954	24
1955	92
1956	44
1957	58
1958	73
1959	74
1960	61
1961	72
1962	42
1963	43
1964	56
1965	56
1966	79
1967	46
1968	73
1969	57
1970	48
1971	50
1972	48
1973	69
1974	35
1975	61
1976	58
1977	44
1978	47

Wettest Day of Each Month

Jul: 41.8 mm (1.6 in)

The wettest day on record for each calendar month at Hallviken. The most was 41.8 mm (1.6 in) on 25 July 1957.

Record daily precipitation for each month at Hallviken
Month	Record daily precipitation (mm)	Date
Jan	15.2 mm (0.6 in)	8 January 1950
Feb	18.5 mm (0.7 in)	6 February 1961
Mar	20.9 mm (0.8 in)	13 March 1978
Apr	21.8 mm (0.9 in)	30 April 1975
May	29.5 mm (1.2 in)	16 May 1975
Jun	30.0 mm (1.2 in)	7 June 1952
Jul	41.8 mm (1.6 in)	25 July 1957
Aug	32.3 mm (1.3 in)	29 August 1964
Sep	37.5 mm (1.5 in)	24 September 1971
Oct	24.4 mm (1.0 in)	30 October 1970
Nov	18.1 mm (0.7 in)	26 November 1957
Dec	19.5 mm (0.8 in)	15 December 1975

Period of Record Coverage

1953 to 1978

26 years of record at Hallviken, 1953 to 1978. 2 years have data for under 90 percent of days and are left out of rankings: 1953, 1978.

Days with data per year at Hallviken
Year	Days with data	Share of year	Complete
1953	315	86%	No
1954	364	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	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	303	83%	No

Latest Records

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

Climate Trend

24 complete years, 1954 to 1977

One stripe for each of 24 complete years at Hallviken, 1954 to 1977. Blue stripes are years cooler than the station's own mean of 1.4 C (34.5 F); red stripes are warmer. The coolest year was 1966, at -0.1 C (31.8 F), and the warmest was 1959, at 3.0 C (37.5 F). The strongest colour marks a difference of 1.7 C (3.1 F).

Annual mean temperature at Hallviken as warming stripes, 1954 to 1977
Year	Annual mean temperature	Difference from the station mean
1954	1.5 C	+0.06 C
1955	0.1 C	-1.28 C
1956	0.2 C	-1.20 C
1957	1.7 C	+0.31 C
1958	0.3 C	-1.08 C
1959	3.0 C	+1.64 C
1960	1.1 C	-0.25 C
1961	2.7 C	+1.31 C
1962	0.8 C	-0.57 C
1963	1.8 C	+0.37 C
1964	2.2 C	+0.81 C
1965	1.0 C	-0.37 C
1966	-0.1 C	-1.49 C
1967	1.8 C	+0.39 C
1968	0.6 C	-0.79 C
1969	1.0 C	-0.39 C
1970	1.0 C	-0.42 C
1971	1.6 C	+0.22 C
1972	2.2 C	+0.84 C
1973	2.1 C	+0.67 C
1974	2.4 C	+0.96 C
1975	2.9 C	+1.46 C
1976	0.7 C	-0.70 C
1977	0.9 C	-0.47 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

1947 to 1978

Yearly extremes at Hallviken: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	30.4 C (86.7 F)	1968	27.6 C (81.6 F)	26
Coldest night (TNn)	-39.5 C (-39.1 F)	1966	-31.0 C (-23.8 F)	26
Wettest day (Rx1day)	41.8 mm (1.6 in)	1957	24.3 mm (1.0 in)	30
Wettest five days (Rx5day)	77.5 mm (3.1 in)	1972	47.2 mm (1.9 in)	30
Longest dry spell (CDD)	34 days	1949	21 days	30

Hottest day (TXx)

The hottest day of the year at Hallviken, 1947 to 1978. The record is 30.4 C (86.7 F) in 1968, marked on the chart; the median year is 27.6 C (81.6 F).

Hottest day (TXx) at Hallviken by year
Year	Hottest day (TXx)
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	28.0 C (82.4 F)
1954	24.6 C (76.3 F)
1955	29.0 C (84.2 F)
1956	27.0 C (80.6 F)
1957	27.0 C (80.6 F)
1958	28.4 C (83.1 F)
1959	26.6 C (79.9 F)
1960	26.8 C (80.2 F)
1961	27.0 C (80.6 F)
1962	21.4 C (70.5 F)
1963	26.2 C (79.2 F)
1964	27.0 C (80.6 F)
1965	26.2 C (79.2 F)
1966	29.2 C (84.6 F)
1967	25.6 C (78.1 F)
1968	30.4 C (86.7 F)
1969	28.4 C (83.1 F)
1970	27.6 C (81.7 F)
1971	27.6 C (81.7 F)
1972	28.0 C (82.4 F)
1973	29.0 C (84.2 F)
1974	28.0 C (82.4 F)
1975	29.0 C (84.2 F)
1976	25.5 C (77.9 F)
1977	28.8 C (83.8 F)
1978	27.5 C (81.5 F)

Coldest night (TNn)

The coldest night of the year at Hallviken, 1947 to 1978. The record is -39.5 C (-39.1 F) in 1966, marked on the chart; the median year is -31.0 C (-23.8 F).

Coldest night (TNn) at Hallviken by year
Year	Coldest night (TNn)
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	-16.0 C (3.2 F)
1954	-28.6 C (-19.5 F)
1955	-38.8 C (-37.8 F)
1956	-35.0 C (-31.0 F)
1957	-31.0 C (-23.8 F)
1958	-36.8 C (-34.2 F)
1959	-32.0 C (-25.6 F)
1960	-30.0 C (-22.0 F)
1961	-28.2 C (-18.8 F)
1962	-26.6 C (-15.9 F)
1963	-30.8 C (-23.4 F)
1964	-28.0 C (-18.4 F)
1965	-33.7 C (-28.7 F)
1966	-39.5 C (-39.1 F)
1967	-36.7 C (-34.1 F)
1968	-29.6 C (-21.3 F)
1969	-33.3 C (-27.9 F)
1970	-31.0 C (-23.8 F)
1971	-32.4 C (-26.3 F)
1972	-31.5 C (-24.7 F)
1973	-29.6 C (-21.3 F)
1974	-30.0 C (-22.0 F)
1975	-28.4 C (-19.1 F)
1976	-36.6 C (-33.9 F)
1977	-29.9 C (-21.8 F)
1978	-37.5 C (-35.5 F)

Wettest day (Rx1day)

The wettest day of the year at Hallviken, 1947 to 1978. The record is 41.8 mm (1.6 in) in 1957, marked on the chart; the median year is 24.3 mm (1.0 in).

Wettest day (Rx1day) at Hallviken by year
Year	Wettest day (Rx1day)
1947	n/a
1948	n/a
1949	16.0 mm (0.6 in)
1950	28.3 mm (1.1 in)
1951	17.0 mm (0.7 in)
1952	30.0 mm (1.2 in)
1953	21.6 mm (0.9 in)
1954	37.7 mm (1.5 in)
1955	21.0 mm (0.8 in)
1956	24.8 mm (1.0 in)
1957	41.8 mm (1.6 in)
1958	24.8 mm (1.0 in)
1959	22.6 mm (0.9 in)
1960	29.6 mm (1.2 in)
1961	20.2 mm (0.8 in)
1962	23.0 mm (0.9 in)
1963	19.5 mm (0.8 in)
1964	32.3 mm (1.3 in)
1965	23.0 mm (0.9 in)
1966	20.6 mm (0.8 in)
1967	22.6 mm (0.9 in)
1968	20.1 mm (0.8 in)
1969	19.9 mm (0.8 in)
1970	24.4 mm (1.0 in)
1971	37.5 mm (1.5 in)
1972	33.2 mm (1.3 in)
1973	24.1 mm (0.9 in)
1974	26.3 mm (1.0 in)
1975	29.5 mm (1.2 in)
1976	25.6 mm (1.0 in)
1977	20.2 mm (0.8 in)
1978	27.2 mm (1.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Hallviken, 1947 to 1978. The record is 77.5 mm (3.1 in) in 1972, marked on the chart; the median year is 47.2 mm (1.9 in).

Wettest five days (Rx5day) at Hallviken by year
Year	Wettest five days (Rx5day)
1947	n/a
1948	n/a
1949	38.8 mm (1.5 in)
1950	68.1 mm (2.7 in)
1951	30.1 mm (1.2 in)
1952	58.7 mm (2.3 in)
1953	58.9 mm (2.3 in)
1954	52.8 mm (2.1 in)
1955	32.3 mm (1.3 in)
1956	46.2 mm (1.8 in)
1957	58.4 mm (2.3 in)
1958	47.2 mm (1.9 in)
1959	37.7 mm (1.5 in)
1960	75.5 mm (3.0 in)
1961	53.9 mm (2.1 in)
1962	68.3 mm (2.7 in)
1963	33.5 mm (1.3 in)
1964	57.4 mm (2.3 in)
1965	35.8 mm (1.4 in)
1966	44.7 mm (1.8 in)
1967	47.2 mm (1.9 in)
1968	46.5 mm (1.8 in)
1969	42.0 mm (1.7 in)
1970	39.0 mm (1.5 in)
1971	68.4 mm (2.7 in)
1972	77.5 mm (3.1 in)
1973	51.6 mm (2.0 in)
1974	70.2 mm (2.8 in)
1975	39.1 mm (1.5 in)
1976	39.2 mm (1.5 in)
1977	34.7 mm (1.4 in)
1978	48.4 mm (1.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Hallviken, 1947 to 1978. The record is 34 days in 1949, marked on the chart; the median year is 21 days.

Longest dry spell (CDD) at Hallviken by year
Year	Longest dry spell (CDD)
1947	n/a
1948	n/a
1949	34 days
1950	16 days
1951	26 days
1952	23 days
1953	20 days
1954	25 days
1955	17 days
1956	21 days
1957	18 days
1958	20 days
1959	21 days
1960	26 days
1961	18 days
1962	16 days
1963	20 days
1964	29 days
1965	26 days
1966	25 days
1967	25 days
1968	19 days
1969	21 days
1970	24 days
1971	21 days
1972	19 days
1973	13 days
1974	33 days
1975	16 days
1976	21 days
1977	18 days
1978	19 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

24 years with a frost

Across 24 years with a frost, the median last spring frost at Hallviken falls on 7 June and the median first autumn frost on 30 August, which leaves a median of 83 days between them.

Frost dates and growing season at Hallviken
Measure	Median, all years	Earliest period	Recent period (1954 to 1977)	Recent against earliest	Fitted trend
Last spring frost	7 June	n/a	7 June	n/a	n/a
First autumn frost	30 August	n/a	30 August	n/a	n/a
Growing days	83 days	n/a	83 days	n/a	n/a

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