Boden Weather Records (SWE00140618)

Record envelope, standing records and threshold days for Boden (SWE00140618), Sweden, with 83 years of record.

Key Facts for Boden

Boden (SWE00140618) is a weather station in Sweden at 65.82 latitude and 21.64 longitude, 25 m (82 ft) above sea level.
The station reports from 1944 to 2026, 83 years of record.
1,464 records set at Boden still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Boden set a daily record high minimum temperature of 14.1 C (57.4 F) on 31 August 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

Location: Sweden, 65.82 latitude, 21.64 longitude.
Elevation: 25 m (82 ft).
Period of record: 1944 to 2026, 83 years.
Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

15 days at or beyond a record

The band shows the record high and record low for each calendar day at Boden. The lines show the 2026 daily maximum and minimum. 15 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Boden, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	11.0 C (51.8 F)	-39.5 C (-39.1 F)	1.0 C (33.8 F)	-32.9 C (-27.2 F)
Feb	10.1 C (50.2 F)	-37.0 C (-34.6 F)	0.8 C (33.4 F)	-33.8 C (-28.8 F)
Mar	13.3 C (55.9 F)	-31.7 C (-25.1 F)	10.5 C (50.9 F)	-21.3 C (-6.3 F)
Apr	20.3 C (68.5 F)	-22.5 C (-8.5 F)	16.4 C (61.5 F)	-6.7 C (19.9 F)
May	29.5 C (85.1 F)	-7.7 C (18.1 F)	22.0 C (71.6 F)	-4.1 C (24.6 F)
Jun	31.3 C (88.3 F)	-1.5 C (29.3 F)	22.6 C (72.7 F)	5.3 C (41.5 F)
Jul	33.7 C (92.7 F)	2.0 C (35.6 F)	28.9 C (84.0 F)	4.4 C (39.9 F)
Aug	29.7 C (85.5 F)	-0.9 C (30.4 F)	22.0 C (71.6 F)	1.1 C (34.0 F)
Sep	26.0 C (78.8 F)	-8.9 C (16.0 F)	n/a	n/a
Oct	17.8 C (64.0 F)	-20.4 C (-4.7 F)	n/a	n/a
Nov	13.1 C (55.6 F)	-30.9 C (-23.6 F)	n/a	n/a
Dec	9.3 C (48.7 F)	-34.6 C (-30.3 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Boden still stand. 1966 holds the most, with 65.

Standing records at Boden by the year they were set
Year set	Standing records
1945	51
1946	23
1947	20
1948	24
1949	7
1962	33
1963	38
1964	31
1965	24
1966	65
1967	27
1968	50
1969	29
1970	30
1971	58
1972	38
1973	47
1974	19
1975	39
1976	28
1977	32
1978	26
1979	5
1980	20
1981	9
1983	8
1986	8
1987	18
1988	14
1989	9
1990	17
1991	10
1992	5
2010	16
2011	48
2012	32
2013	22
2014	51
2015	30
2016	28
2017	26
2018	42
2019	53
2020	36
2021	22
2022	33
2023	29
2024	54
2025	52
2026	28

All-Time Record Progression

6 new records

6 all-time records were set at Boden between 12 May 2019 and 4 January 2024. Each dot is a new record.

When Boden set new all-time records
Date	Kind	Detail
2019-05-12	Record daily precipitation	Record daily precipitation 56.5 mm (2.2 in)
2019-07-27	Record high maximum temperature	Record high maximum temperature 33.7 C (92.7 F)
2023-08-08	Record high minimum temperature	Record high minimum temperature 20.4 C (68.7 F)
2024-01-03	Record low minimum temperature	Record low minimum temperature -37.5 C (-35.5 F)
2024-01-04	Record low maximum temperature	Record low maximum temperature -36.0 C (-32.8 F)
2024-01-04	Record low minimum temperature	Record low minimum temperature -39.5 C (-39.1 F)

Wettest Day of Each Month

May: 56.5 mm (2.2 in)

The wettest day on record for each calendar month at Boden. The most was 56.5 mm (2.2 in) on 12 May 2019.

Record daily precipitation for each month at Boden
Month	Record daily precipitation (mm)	Date
Jan	25.3 mm (1.0 in)	21 January 2021
Feb	23.0 mm (0.9 in)	15 February 1987
Mar	23.1 mm (0.9 in)	28 March 1989
Apr	23.9 mm (0.9 in)	26 April 2016
May	56.5 mm (2.2 in)	12 May 2019
Jun	36.0 mm (1.4 in)	23 June 2023
Jul	39.3 mm (1.5 in)	28 July 1976
Aug	55.0 mm (2.2 in)	17 August 2026
Sep	51.0 mm (2.0 in)	19 September 2023
Oct	42.5 mm (1.7 in)	20 October 1971
Nov	20.6 mm (0.8 in)	23 November 2017
Dec	33.0 mm (1.3 in)	18 December 1966

Period of Record Coverage

1945 to 2026

50 years of record at Boden, 1945 to 2026. 19 years have data for under 90 percent of days and are left out of rankings: 1947, 1948, 1949, 1962, 1977, 1978, 1979, 1980 and others.

Days with data per year at Boden
Year	Days with data	Share of year	Complete
1945	365	100%	Yes
1946	362	99%	Yes
1947	303	83%	No
1948	304	83%	No
1949	150	41%	No
1962	306	84%	No
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	335	92%	Yes
1977	272	75%	No
1978	242	66%	No
1979	181	50%	No
1980	182	50%	No
1981	181	50%	No
1983	115	32%	No
1986	80	22%	No
1987	228	62%	No
1988	204	56%	No
1989	170	47%	No
1990	164	45%	No
1991	153	42%	No
1992	15	4%	No
2010	306	84%	No
2011	365	100%	Yes
2012	366	100%	Yes
2013	365	100%	Yes
2014	365	100%	Yes
2015	365	100%	Yes
2016	366	100%	Yes
2017	365	100%	Yes
2018	365	100%	Yes
2019	365	100%	Yes
2020	366	100%	Yes
2021	365	100%	Yes
2022	365	100%	Yes
2023	365	100%	Yes
2024	359	98%	Yes
2025	346	95%	Yes
2026	243	67%	No

Latest Records

Latest records at Boden
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 August 2026	Boden, SE	daily high min (Provisional)	14.1 C (57.4 F)	1.8 C (3.2 F)	37 years	24 of 100 (Routine)
29 August 2026	Boden, SE	daily rain (Provisional)	9.6 mm (0.38 in)	3.9 mm (0.15 in)	52 years	20 of 100 (Routine)
20 August 2026	Boden, SE	daily rain (Provisional)	37.3 mm (1.5 in)	5.6 mm (0.22 in)	4 years	17 of 100 (Routine)
17 August 2026	Boden, SE	monthly rain	55.0 mm (2.2 in)	9.6 mm (0.38 in)	51 years	47 of 100 (Notable)
16 August 2026	Boden, SE	daily rain	31.2 mm (1.2 in)	20.4 mm (0.8 in)	3 years	38 of 100 (Notable)
13 August 2026	Boden, SE	daily low min	1.1 C (34.0 F)	1.5 C (2.7 F)	61 years	30 of 100 (Routine)
7 August 2026	Boden, SE	daily rain	37.9 mm (1.5 in)	16.2 mm (0.6 in)	35 years	41 of 100 (Notable)
2 August 2026	Boden, SE	daily low min	5.6 C (42.1 F)	0.9 C (1.6 F)	15 years	14 of 100 (Routine)
30 July 2026	Boden, SE	daily low min	5.6 C (42.1 F)	0.2 C (0.4 F)	39 years	19 of 100 (Routine)
21 July 2026	Boden, SE	daily low min	4.5 C (40.1 F)	0.4 C (0.7 F)	4 years	10 of 100 (Routine)
8 July 2026	Boden, SE	daily low min	4.4 C (39.9 F)	0.4 C (0.7 F)	8 years	11 of 100 (Routine)
29 June 2026	Boden, SE	daily rain	13.3 mm (0.5 in)	1.1 mm (0.04 in)	12 years	13 of 100 (Routine)
17 June 2026	Boden, SE	daily high min	13.7 C (56.7 F)	0.8 C (1.4 F)	1 year	10 of 100 (Routine)
7 June 2026	Boden, SE	daily high min	12.5 C (54.5 F)	0.9 C (1.6 F)	36 years	21 of 100 (Routine)
6 June 2026	Boden, SE	daily rain	20.6 mm (0.8 in)	2.3 mm (0.09 in)	11 years	15 of 100 (Routine)
25 May 2026	Boden, SE	daily high min (Tie)	9.4 C (48.9 F)	tie	49 years	5 of 100 (Routine)
22 May 2026	Boden, SE	daily high min	9.7 C (49.5 F)	0.2 C (0.4 F)	48 years	22 of 100 (Routine)
20 May 2026	Boden, SE	daily high min	11.4 C (52.5 F)	0.6 C (1.1 F)	12 years	12 of 100 (Routine)
19 May 2026	Boden, SE	daily rain	6.2 mm (0.24 in)	0.4 mm (0.02 in)	9 years	10 of 100 (Routine)
14 May 2026	Boden, SE	daily rain	16.3 mm (0.6 in)	8.1 mm (0.32 in)	11 years	20 of 100 (Routine)

Climate Trend

30 complete years, 1945 to 2025

One stripe for each of 30 complete years at Boden, 1945 to 2025. Blue stripes are years cooler than the station's own mean of 2.2 C (35.9 F); red stripes are warmer. The coolest year was 1966, at -0.4 C (31.3 F), and the warmest was 2020, at 4.3 C (39.8 F). The strongest colour marks a difference of 2.6 C (4.7 F).

Annual mean temperature at Boden as warming stripes, 1945 to 2025
Year	Annual mean temperature	Difference from the station mean
1945	1.2 C	-0.99 C
1946	2.3 C	+0.16 C
1963	1.5 C	-0.69 C
1964	2.0 C	-0.22 C
1965	0.7 C	-1.49 C
1966	-0.4 C	-2.54 C
1967	1.7 C	-0.48 C
1968	0.2 C	-1.94 C
1969	0.5 C	-1.67 C
1970	1.0 C	-1.20 C
1971	0.9 C	-1.29 C
1972	2.3 C	+0.13 C
1973	1.6 C	-0.59 C
1974	3.0 C	+0.80 C
1975	3.0 C	+0.81 C
2011	3.3 C	+1.15 C
2012	1.6 C	-0.53 C
2013	2.8 C	+0.59 C
2014	3.6 C	+1.42 C
2015	3.9 C	+1.71 C
2016	2.6 C	+0.44 C
2017	2.3 C	+0.15 C
2018	2.4 C	+0.18 C
2019	2.0 C	-0.16 C
2020	4.3 C	+2.16 C
2021	2.1 C	-0.05 C
2022	3.3 C	+1.11 C
2023	2.4 C	+0.27 C
2024	3.2 C	+1.03 C
2025	3.9 C	+1.70 C

The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1945 to 2025. In Fahrenheit: 0.5 F (0.3 to 0.7) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Boden
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.3 C (0.2 to 0.4) per decade	0.5 F (0.3 to 0.7) per decade	1945 to 2025	30	Rise
Mean daily maximum	0.3 C (0.2 to 0.4) per decade	0.6 F (0.3 to 0.8) per decade	1945 to 2025	30	Rise
Mean daily minimum	0.2 C (0.1 to 0.4) per decade	0.4 F (0.2 to 0.7) per decade	1945 to 2025	30	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

1944 to 2026

Yearly extremes at Boden: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	33.7 C (92.7 F)	2019	28.3 C (82.9 F)	50
Coldest night (TNn)	-39.5 C (-39.1 F)	2024	-31.5 C (-24.8 F)	50
Wettest day (Rx1day)	56.5 mm (2.2 in)	2019	26.4 mm (1.0 in)	48
Wettest five days (Rx5day)	152.7 mm (6.0 in)	2026	47.8 mm (1.9 in)	46
Longest dry spell (CDD)	48 days	1974	23 days	48

Hottest day (TXx)

The hottest day of the year at Boden, 1944 to 2026. The record is 33.7 C (92.7 F) in 2019, marked on the chart; the median year is 28.3 C (82.9 F).

Hottest day (TXx) at Boden by year
Year	Hottest day (TXx)
1944	n/a
1945	33.6 C (92.5 F)
1946	28.0 C (82.4 F)
1947	30.8 C (87.4 F)
1948	26.7 C (80.1 F)
1949	23.2 C (73.8 F)
1962	23.5 C (74.3 F)
1963	28.6 C (83.5 F)
1964	26.0 C (78.8 F)
1965	24.8 C (76.6 F)
1966	31.2 C (88.2 F)
1967	28.1 C (82.6 F)
1968	31.6 C (88.9 F)
1969	29.7 C (85.5 F)
1970	30.0 C (86.0 F)
1971	29.8 C (85.6 F)
1972	29.5 C (85.1 F)
1973	28.7 C (83.7 F)
1974	28.5 C (83.3 F)
1975	25.4 C (77.7 F)
1976	27.1 C (80.8 F)
1977	26.4 C (79.5 F)
1978	24.4 C (75.9 F)
1979	25.0 C (77.0 F)
1980	28.9 C (84.0 F)
1981	19.8 C (67.6 F)
1983	21.9 C (71.4 F)
1985	n/a
1986	15.5 C (59.9 F)
1987	27.5 C (81.5 F)
1988	28.8 C (83.8 F)
1989	26.3 C (79.3 F)
1990	25.0 C (77.0 F)
1991	29.5 C (85.1 F)
1992	10.2 C (50.4 F)
2010	27.6 C (81.7 F)
2011	31.3 C (88.3 F)
2012	25.2 C (77.4 F)
2013	27.3 C (81.1 F)
2014	31.8 C (89.2 F)
2015	27.4 C (81.3 F)
2016	26.7 C (80.1 F)
2017	25.5 C (77.9 F)
2018	30.4 C (86.7 F)
2019	33.7 C (92.7 F)
2020	30.2 C (86.4 F)
2021	31.9 C (89.4 F)
2022	30.3 C (86.5 F)
2023	28.4 C (83.1 F)
2024	28.7 C (83.7 F)
2025	32.3 C (90.1 F)
2026	28.9 C (84.0 F)

Coldest night (TNn)

The coldest night of the year at Boden, 1944 to 2026. The record is -39.5 C (-39.1 F) in 2024, marked on the chart; the median year is -31.5 C (-24.8 F).

Coldest night (TNn) at Boden by year
Year	Coldest night (TNn)
1944	n/a
1945	-36.6 C (-33.9 F)
1946	-28.2 C (-18.8 F)
1947	-34.4 C (-29.9 F)
1948	-32.5 C (-26.5 F)
1949	-25.3 C (-13.5 F)
1962	-31.4 C (-24.5 F)
1963	-32.4 C (-26.3 F)
1964	-27.9 C (-18.2 F)
1965	-32.7 C (-26.9 F)
1966	-34.6 C (-30.3 F)
1967	-35.5 C (-31.9 F)
1968	-31.6 C (-24.9 F)
1969	-31.9 C (-25.4 F)
1970	-32.5 C (-26.5 F)
1971	-31.7 C (-25.1 F)
1972	-31.6 C (-24.9 F)
1973	-34.6 C (-30.3 F)
1974	-25.1 C (-13.2 F)
1975	-29.3 C (-20.7 F)
1976	-33.4 C (-28.1 F)
1977	-28.2 C (-18.8 F)
1978	-35.7 C (-32.3 F)
1979	-26.5 C (-15.7 F)
1980	-36.1 C (-33.0 F)
1981	-29.2 C (-20.6 F)
1983	-21.8 C (-7.2 F)
1985	n/a
1986	-27.5 C (-17.5 F)
1987	-28.9 C (-20.0 F)
1988	-24.8 C (-12.6 F)
1989	-24.3 C (-11.7 F)
1990	-28.5 C (-19.3 F)
1991	-25.6 C (-14.1 F)
1992	-18.7 C (-1.7 F)
2010	-31.5 C (-24.7 F)
2011	-33.8 C (-28.8 F)
2012	-37.0 C (-34.6 F)
2013	-29.2 C (-20.6 F)
2014	-33.6 C (-28.5 F)
2015	-30.5 C (-22.9 F)
2016	-33.4 C (-28.1 F)
2017	-32.2 C (-26.0 F)
2018	-31.2 C (-24.2 F)
2019	-31.1 C (-24.0 F)
2020	-25.9 C (-14.6 F)
2021	-32.6 C (-26.7 F)
2022	-31.9 C (-25.4 F)
2023	-25.4 C (-13.7 F)
2024	-39.5 C (-39.1 F)
2025	-27.8 C (-18.0 F)
2026	-33.8 C (-28.8 F)

Wettest day (Rx1day)

The wettest day of the year at Boden, 1944 to 2026. The record is 56.5 mm (2.2 in) in 2019, marked on the chart; the median year is 26.4 mm (1.0 in).

Wettest day (Rx1day) at Boden by year
Year	Wettest day (Rx1day)
1944	n/a
1945	n/a
1946	0.2 mm (0.01 in)
1947	21.0 mm (0.8 in)
1948	17.4 mm (0.7 in)
1949	14.7 mm (0.6 in)
1962	18.0 mm (0.7 in)
1963	26.4 mm (1.0 in)
1964	34.7 mm (1.4 in)
1965	23.7 mm (0.9 in)
1966	33.0 mm (1.3 in)
1967	42.2 mm (1.7 in)
1968	22.8 mm (0.9 in)
1969	34.5 mm (1.4 in)
1970	45.5 mm (1.8 in)
1971	42.5 mm (1.7 in)
1972	14.4 mm (0.6 in)
1973	19.6 mm (0.8 in)
1974	38.8 mm (1.5 in)
1975	45.4 mm (1.8 in)
1976	39.3 mm (1.5 in)
1977	16.3 mm (0.6 in)
1978	39.3 mm (1.5 in)
1979	24.3 mm (1.0 in)
1980	30.2 mm (1.2 in)
1981	20.6 mm (0.8 in)
1983	10.0 mm (0.4 in)
1985	6.6 mm (0.26 in)
1986	21.7 mm (0.9 in)
1987	23.0 mm (0.9 in)
1988	20.4 mm (0.8 in)
1989	26.2 mm (1.0 in)
1990	31.4 mm (1.2 in)
1991	26.3 mm (1.0 in)
1992	12.0 mm (0.5 in)
2010	n/a
2011	n/a
2012	0.5 mm (0.02 in)
2013	20.1 mm (0.8 in)
2014	30.1 mm (1.2 in)
2015	32.4 mm (1.3 in)
2016	29.4 mm (1.2 in)
2017	31.5 mm (1.2 in)
2018	37.9 mm (1.5 in)
2019	56.5 mm (2.2 in)
2020	25.8 mm (1.0 in)
2021	34.0 mm (1.3 in)
2022	27.9 mm (1.1 in)
2023	51.0 mm (2.0 in)
2024	35.0 mm (1.4 in)
2025	20.9 mm (0.8 in)
2026	55.0 mm (2.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Boden, 1944 to 2026. The record is 152.7 mm (6.0 in) in 2026, marked on the chart; the median year is 47.8 mm (1.9 in).

Wettest five days (Rx5day) at Boden by year
Year	Wettest five days (Rx5day)
1944	n/a
1945	n/a
1946	n/a
1947	41.0 mm (1.6 in)
1948	37.3 mm (1.5 in)
1949	34.5 mm (1.4 in)
1962	33.6 mm (1.3 in)
1963	50.5 mm (2.0 in)
1964	41.3 mm (1.6 in)
1965	47.0 mm (1.9 in)
1966	56.6 mm (2.2 in)
1967	61.7 mm (2.4 in)
1968	38.9 mm (1.5 in)
1969	40.6 mm (1.6 in)
1970	82.8 mm (3.3 in)
1971	49.0 mm (1.9 in)
1972	38.2 mm (1.5 in)
1973	33.4 mm (1.3 in)
1974	74.7 mm (2.9 in)
1975	75.8 mm (3.0 in)
1976	50.9 mm (2.0 in)
1977	28.4 mm (1.1 in)
1978	71.0 mm (2.8 in)
1979	25.5 mm (1.0 in)
1980	59.6 mm (2.3 in)
1981	45.3 mm (1.8 in)
1983	21.3 mm (0.8 in)
1985	12.0 mm (0.5 in)
1986	34.9 mm (1.4 in)
1987	38.6 mm (1.5 in)
1988	34.4 mm (1.4 in)
1989	39.2 mm (1.5 in)
1990	44.8 mm (1.8 in)
1991	58.4 mm (2.3 in)
1992	19.5 mm (0.8 in)
2010	n/a
2011	n/a
2012	n/a
2013	32.0 mm (1.3 in)
2014	81.1 mm (3.2 in)
2015	78.4 mm (3.1 in)
2016	51.3 mm (2.0 in)
2017	59.6 mm (2.3 in)
2018	73.0 mm (2.9 in)
2019	82.3 mm (3.2 in)
2020	53.7 mm (2.1 in)
2021	91.2 mm (3.6 in)
2022	48.6 mm (1.9 in)
2023	63.1 mm (2.5 in)
2024	67.5 mm (2.7 in)
2025	28.2 mm (1.1 in)
2026	152.7 mm (6.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Boden, 1944 to 2026. The record is 48 days in 1974, marked on the chart; the median year is 23 days.

Longest dry spell (CDD) at Boden by year
Year	Longest dry spell (CDD)
1944	n/a
1945	n/a
1946	1 day
1947	29 days
1948	27 days
1949	18 days
1962	28 days
1963	26 days
1964	27 days
1965	21 days
1966	17 days
1967	25 days
1968	21 days
1969	42 days
1970	44 days
1971	26 days
1972	42 days
1973	20 days
1974	48 days
1975	36 days
1976	31 days
1977	19 days
1978	27 days
1979	22 days
1980	22 days
1981	17 days
1983	14 days
1985	20 days
1986	28 days
1987	33 days
1988	16 days
1989	17 days
1990	28 days
1991	23 days
1992	18 days
2010	n/a
2011	n/a
2012	1 day
2013	31 days
2014	29 days
2015	19 days
2016	17 days
2017	17 days
2018	26 days
2019	46 days
2020	20 days
2021	19 days
2022	21 days
2023	18 days
2024	24 days
2025	20 days
2026	26 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

30 years with a frost

Across 30 years with a frost, the median last spring frost at Boden falls on 20 May and the median first autumn frost on 15 September, which leaves a median of 118 days between them.

Fitted over all years, the growing season changes by +0.5 days per decade at this station.

Frost dates and growing season at Boden
Measure	Median, all years	Earliest period	Recent period (1945 to 2025)	Recent against earliest	Fitted trend
Last spring frost	20 May	n/a	20 May	n/a	-1.3 days per decade
First autumn frost	15 September	n/a	15 September	n/a	-0.8 days per decade
Growing days	118 days	n/a	118 days	n/a	+0.5 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

34 years, 1947 to 2025

A day with at least 29.9 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 60.5 mm (2.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Boden: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	29.9 mm (1.2 in)
5 years	39.2 mm (1.5 in)
10 years	44.9 mm (1.8 in)
25 years	51.6 mm (2.0 in)
50 years	56.2 mm (2.2 in)	Longer than the 34 years of record
100 years	60.5 mm (2.4 in)	Longer than the 34 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, 34 years of values from 1947 to 2025.

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: 56.5 mm (2.2 in) in 2019; 51.0 mm (2.0 in) in 2023; 45.5 mm (1.8 in) in 1970.

Download the Data

Data for Boden standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Boden 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).