Orrbyn Weather Records (SWE00140650)

Record envelope, standing records and threshold days for Orrbyn (SWE00140650), Sweden, with 48 years of record.

Key Facts for Orrbyn

Orrbyn (SWE00140650) is a weather station in Sweden at 65.95 latitude and 22.10 longitude, 15 m (49 ft) above sea level.
The station reports from 1964 to 2011, 48 years of record.
1,464 records set at Orrbyn still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Orrbyn set a monthly record high minimum temperature of 17.4 C (63.3 F) on 30 June 2011.

About the Station

Location: Sweden, 65.95 latitude, 22.10 longitude.
Elevation: 15 m (49 ft).
Period of record: 1964 to 2011, 48 years.
Eligible elements: tmax, tmin, prcp.

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 Orrbyn. 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 Orrbyn, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	10.6 C (51.1 F)	-44.2 C (-47.6 F)	n/a	n/a
Feb	10.0 C (50.0 F)	-41.3 C (-42.3 F)	n/a	n/a
Mar	12.2 C (54.0 F)	-36.9 C (-34.4 F)	n/a	n/a
Apr	18.0 C (64.4 F)	-25.0 C (-13.0 F)	n/a	n/a
May	29.6 C (85.3 F)	-10.3 C (13.5 F)	n/a	n/a
Jun	31.8 C (89.2 F)	-2.9 C (26.8 F)	n/a	n/a
Jul	32.4 C (90.3 F)	-0.2 C (31.6 F)	n/a	n/a
Aug	31.1 C (88.0 F)	-2.6 C (27.3 F)	n/a	n/a
Sep	23.9 C (75.0 F)	-10.7 C (12.7 F)	n/a	n/a
Oct	17.4 C (63.3 F)	-25.3 C (-13.5 F)	n/a	n/a
Nov	12.0 C (53.6 F)	-35.6 C (-32.1 F)	n/a	n/a
Dec	9.0 C (48.2 F)	-37.9 C (-36.2 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Orrbyn still stand. 1966 holds the most, with 75.

Standing records at Orrbyn by the year they were set
Year set	Standing records
1964	11
1965	27
1966	75
1967	33
1968	50
1969	24
1970	23
1971	45
1972	45
1973	40
1974	19
1975	42
1976	31
1977	34
1978	47
1979	17
1980	38
1981	44
1982	25
1983	29
1984	13
1985	33
1986	30
1987	27
1988	31
1989	28
1990	36
1991	12
1992	53
1993	21
1994	10
1995	27
1996	20
1997	20
1998	22
1999	36
2000	36
2001	20
2002	33
2003	37
2004	19
2005	26
2006	43
2007	28
2008	24
2009	30
2010	31
2011	19

All-Time Record Progression

2 new records

2 all-time records were set at Orrbyn between 28 January 1999 and 17 July 2003. Each dot is a new record.

When Orrbyn set new all-time records
Date	Kind	Detail
1999-01-28	Record low minimum temperature	Record low minimum temperature -44.2 C (-47.6 F)
2003-07-17	Record high maximum temperature	Record high maximum temperature 32.4 C (90.3 F)

Wettest Day of Each Month

Aug: 61.9 mm (2.4 in)

The wettest day on record for each calendar month at Orrbyn. The most was 61.9 mm (2.4 in) on 11 August 1993.

Record daily precipitation for each month at Orrbyn
Month	Record daily precipitation (mm)	Date
Jan	37.4 mm (1.5 in)	29 January 2000
Feb	15.4 mm (0.6 in)	13 February 1973
Mar	26.6 mm (1.0 in)	28 March 1989
Apr	22.0 mm (0.9 in)	18 April 1971
May	27.3 mm (1.1 in)	19 May 2001
Jun	35.8 mm (1.4 in)	20 June 2011
Jul	41.0 mm (1.6 in)	30 July 1984
Aug	61.9 mm (2.4 in)	11 August 1993
Sep	50.7 mm (2.0 in)	17 September 1978
Oct	41.3 mm (1.6 in)	7 October 1980
Nov	38.8 mm (1.5 in)	10 November 1972
Dec	32.7 mm (1.3 in)	18 December 1966

Period of Record Coverage

1964 to 2011

48 years of record at Orrbyn, 1964 to 2011. 2 years have data for under 90 percent of days and are left out of rankings: 1964, 2011.

Days with data per year at Orrbyn
Year	Days with data	Share of year	Complete
1964	122	33%	No
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	365	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	364	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	333	91%	Yes
1990	364	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	353	97%	Yes
1995	364	100%	Yes
1996	366	100%	Yes
1997	353	97%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	364	99%	Yes
2005	365	100%	Yes
2006	356	98%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	181	50%	No

Latest Records

Latest records at Orrbyn
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 June 2011	Orrbyn, SE	monthly high min	17.4 C (63.3 F)	0.5 C (0.9 F)	10 years	18 of 100 (Routine)
29 June 2011	Orrbyn, SE	daily high min	14.7 C (58.5 F)	0.2 C (0.4 F)	21 years	10 of 100 (Routine)
21 June 2011	Orrbyn, SE	daily rain	33.9 mm (1.3 in)	27.6 mm (1.1 in)	38 years	55 of 100 (Notable)
20 June 2011	Orrbyn, SE	monthly rain	35.8 mm (1.4 in)	8.6 mm (0.34 in)	6 years	32 of 100 (Routine)
10 June 2011	Orrbyn, SE	daily high max	30.5 C (86.9 F)	2.1 C (3.8 F)	40 years	20 of 100 (Routine)
8 June 2011	Orrbyn, SE	daily high min	13.1 C (55.6 F)	2.0 C (3.6 F)	40 years	21 of 100 (Routine)
31 May 2011	Orrbyn, SE	daily rain	18.2 mm (0.7 in)	5.4 mm (0.21 in)	21 years	20 of 100 (Routine)
23 May 2011	Orrbyn, SE	daily rain	13.1 mm (0.5 in)	4.9 mm (0.19 in)	37 years	20 of 100 (Routine)
9 May 2011	Orrbyn, SE	daily high max	20.5 C (68.9 F)	0.1 C (0.2 F)	36 years	14 of 100 (Routine)
29 April 2011	Orrbyn, SE	daily high min	3.4 C (38.1 F)	0.5 C (0.9 F)	20 years	10 of 100 (Routine)
24 April 2011	Orrbyn, SE	daily high max	17.7 C (63.9 F)	2.2 C (4.0 F)	8 years	11 of 100 (Routine)
23 April 2011	Orrbyn, SE	daily high max (Tie)	13.7 C (56.7 F)	tie	8 years	1 of 100 (Routine)
17 April 2011	Orrbyn, SE	daily high max	13.0 C (55.4 F)	2.0 C (3.6 F)	4 years	10 of 100 (Routine)
16 April 2011	Orrbyn, SE	daily high min	3.9 C (39.0 F)	2.4 C (4.3 F)	12 years	11 of 100 (Routine)
16 April 2011	Orrbyn, SE	daily high max (Tie)	11.0 C (51.8 F)	tie	8 years	1 of 100 (Routine)
11 April 2011	Orrbyn, SE	daily high max	12.2 C (54.0 F)	2.6 C (4.7 F)	44 years	23 of 100 (Routine)
3 April 2011	Orrbyn, SE	daily high min	0.3 C (32.5 F)	0.5 C (0.9 F)	16 years	9 of 100 (Routine)
31 March 2011	Orrbyn, SE	daily low min	-18.1 C (-0.6 F)	2.0 C (3.6 F)	0 years	6 of 100 (Routine)
4 March 2011	Orrbyn, SE	daily high max	5.7 C (42.3 F)	1.5 C (2.7 F)	32 years	15 of 100 (Routine)
3 March 2011	Orrbyn, SE	daily high max	5.5 C (41.9 F)	1.5 C (2.7 F)	13 years	10 of 100 (Routine)

Climate Trend

43 complete years, 1965 to 2010

One stripe for each of 43 complete years at Orrbyn, 1965 to 2010. Blue stripes are years cooler than the station's own mean of 0.4 C (32.8 F); red stripes are warmer. The coolest year was 1985, at -2.3 C (27.8 F), and the warmest was 2000, at 2.4 C (36.3 F). The strongest colour marks a difference of 2.8 C (5.0 F).

Annual mean temperature at Orrbyn as warming stripes, 1965 to 2010
Year	Annual mean temperature	Difference from the station mean
1965	-0.4 C	-0.84 C
1966	-1.4 C	-1.88 C
1967	0.7 C	+0.26 C
1968	-1.2 C	-1.65 C
1969	-0.5 C	-0.98 C
1970	-0.1 C	-0.54 C
1971	-0.4 C	-0.84 C
1972	1.2 C	+0.71 C
1973	0.4 C	-0.08 C
1974	2.2 C	+1.71 C
1975	1.9 C	+1.43 C
1976	-0.4 C	-0.88 C
1977	-0.1 C	-0.51 C
1978	-1.3 C	-1.72 C
1979	0.1 C	-0.36 C
1980	-1.2 C	-1.66 C
1981	-1.2 C	-1.66 C
1982	0.4 C	+0.00 C
1983	0.4 C	-0.09 C
1984	1.0 C	+0.60 C
1985	-2.3 C	-2.79 C
1986	-0.2 C	-0.65 C
1987	-1.0 C	-1.46 C
1988	0.8 C	+0.33 C
1990	1.9 C	+1.50 C
1991	0.9 C	+0.49 C
1992	1.7 C	+1.28 C
1993	0.9 C	+0.43 C
1995	0.8 C	+0.38 C
1996	0.8 C	+0.35 C
1998	0.2 C	-0.27 C
1999	0.9 C	+0.49 C
2000	2.4 C	+1.93 C
2001	0.9 C	+0.44 C
2002	0.8 C	+0.35 C
2003	1.3 C	+0.89 C
2004	1.0 C	+0.53 C
2005	2.1 C	+1.70 C
2006	1.6 C	+1.18 C
2007	1.5 C	+1.03 C
2008	1.5 C	+1.05 C
2009	1.2 C	+0.75 C
2010	-0.6 C	-1.06 C

The annual mean temperature here has risen by 0.4 C (0.2 to 0.6) per decade over 1965 to 2010. In Fahrenheit: 0.7 F (0.3 to 1.1) per decade. The slope is a straight line fitted to 43 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Orrbyn
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	1965 to 2010	43	Rise
Mean daily maximum	0.4 C (0.2 to 0.6) per decade	0.7 F (0.3 to 1.1) per decade	1965 to 2010	43	Rise
Mean daily minimum	0.4 C (0.1 to 0.6) per decade	0.7 F (0.3 to 1.1) per decade	1965 to 2010	43	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

1964 to 2011

Yearly extremes at Orrbyn: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	32.4 C (90.3 F)	2003	28.3 C (82.9 F)	48
Coldest night (TNn)	-44.2 C (-47.6 F)	1999	-35.1 C (-31.2 F)	48
Wettest day (Rx1day)	61.9 mm (2.4 in)	1993	27.6 mm (1.1 in)	48
Wettest five days (Rx5day)	97.2 mm (3.8 in)	1993	50.9 mm (2.0 in)	48
Longest dry spell (CDD)	39 days	1970	22 days	48

Hottest day (TXx)

The hottest day of the year at Orrbyn, 1964 to 2011. The record is 32.4 C (90.3 F) in 2003, marked on the chart; the median year is 28.3 C (82.9 F).

Hottest day (TXx) at Orrbyn by year
Year	Hottest day (TXx)
1964	16.7 C (62.1 F)
1965	25.3 C (77.5 F)
1966	31.8 C (89.2 F)
1967	26.6 C (79.9 F)
1968	31.8 C (89.2 F)
1969	31.1 C (88.0 F)
1970	30.7 C (87.3 F)
1971	30.2 C (86.4 F)
1972	30.5 C (86.9 F)
1973	29.0 C (84.2 F)
1974	28.3 C (82.9 F)
1975	26.5 C (79.7 F)
1976	28.4 C (83.1 F)
1977	28.5 C (83.3 F)
1978	28.3 C (82.9 F)
1979	25.8 C (78.4 F)
1980	30.4 C (86.7 F)
1981	26.1 C (79.0 F)
1982	26.7 C (80.1 F)
1983	28.0 C (82.4 F)
1984	27.4 C (81.3 F)
1985	28.9 C (84.0 F)
1986	30.5 C (86.9 F)
1987	27.9 C (82.2 F)
1988	30.6 C (87.1 F)
1989	26.5 C (79.7 F)
1990	25.6 C (78.1 F)
1991	27.8 C (82.0 F)
1992	28.5 C (83.3 F)
1993	27.0 C (80.6 F)
1994	28.1 C (82.6 F)
1995	28.4 C (83.1 F)
1996	26.2 C (79.2 F)
1997	28.5 C (83.3 F)
1998	26.1 C (79.0 F)
1999	27.6 C (81.7 F)
2000	28.2 C (82.8 F)
2001	27.3 C (81.1 F)
2002	29.2 C (84.6 F)
2003	32.4 C (90.3 F)
2004	27.1 C (80.8 F)
2005	28.4 C (83.1 F)
2006	29.7 C (85.5 F)
2007	28.5 C (83.3 F)
2008	27.8 C (82.0 F)
2009	28.8 C (83.8 F)
2010	27.4 C (81.3 F)
2011	30.5 C (86.9 F)

Coldest night (TNn)

The coldest night of the year at Orrbyn, 1964 to 2011. The record is -44.2 C (-47.6 F) in 1999, marked on the chart; the median year is -35.1 C (-31.2 F).

Coldest night (TNn) at Orrbyn by year
Year	Coldest night (TNn)
1964	-28.1 C (-18.6 F)
1965	-35.0 C (-31.0 F)
1966	-41.3 C (-42.3 F)
1967	-40.4 C (-40.7 F)
1968	-35.3 C (-31.5 F)
1969	-35.8 C (-32.4 F)
1970	-35.4 C (-31.7 F)
1971	-36.9 C (-34.4 F)
1972	-35.4 C (-31.7 F)
1973	-37.9 C (-36.2 F)
1974	-28.6 C (-19.5 F)
1975	-36.0 C (-32.8 F)
1976	-36.6 C (-33.9 F)
1977	-36.6 C (-33.9 F)
1978	-40.8 C (-41.4 F)
1979	-37.5 C (-35.5 F)
1980	-37.9 C (-36.2 F)
1981	-36.6 C (-33.9 F)
1982	-34.9 C (-30.8 F)
1983	-33.0 C (-27.4 F)
1984	-33.9 C (-29.0 F)
1985	-38.5 C (-37.3 F)
1986	-38.3 C (-36.9 F)
1987	-38.1 C (-36.6 F)
1988	-33.3 C (-27.9 F)
1989	-31.0 C (-23.8 F)
1990	-32.2 C (-26.0 F)
1991	-31.6 C (-24.9 F)
1992	-26.0 C (-14.8 F)
1993	-34.0 C (-29.2 F)
1994	-35.6 C (-32.1 F)
1995	-34.5 C (-30.1 F)
1996	-33.8 C (-28.8 F)
1997	-32.4 C (-26.3 F)
1998	-34.5 C (-30.1 F)
1999	-44.2 C (-47.6 F)
2000	-31.7 C (-25.1 F)
2001	-32.3 C (-26.1 F)
2002	-37.0 C (-34.6 F)
2003	-38.2 C (-36.8 F)
2004	-32.0 C (-25.6 F)
2005	-33.2 C (-27.8 F)
2006	-33.5 C (-28.3 F)
2007	-34.5 C (-30.1 F)
2008	-26.6 C (-15.9 F)
2009	-33.5 C (-28.3 F)
2010	-35.2 C (-31.4 F)
2011	-36.4 C (-33.5 F)

Wettest day (Rx1day)

The wettest day of the year at Orrbyn, 1964 to 2011. The record is 61.9 mm (2.4 in) in 1993, marked on the chart; the median year is 27.6 mm (1.1 in).

Wettest day (Rx1day) at Orrbyn by year
Year	Wettest day (Rx1day)
1964	24.6 mm (1.0 in)
1965	28.5 mm (1.1 in)
1966	35.8 mm (1.4 in)
1967	54.7 mm (2.2 in)
1968	25.0 mm (1.0 in)
1969	33.5 mm (1.3 in)
1970	37.1 mm (1.5 in)
1971	22.0 mm (0.9 in)
1972	38.8 mm (1.5 in)
1973	15.4 mm (0.6 in)
1974	20.5 mm (0.8 in)
1975	30.3 mm (1.2 in)
1976	25.2 mm (1.0 in)
1977	29.3 mm (1.2 in)
1978	50.7 mm (2.0 in)
1979	17.9 mm (0.7 in)
1980	41.3 mm (1.6 in)
1981	18.9 mm (0.7 in)
1982	25.1 mm (1.0 in)
1983	24.4 mm (1.0 in)
1984	41.0 mm (1.6 in)
1985	20.7 mm (0.8 in)
1986	26.4 mm (1.0 in)
1987	28.8 mm (1.1 in)
1988	20.1 mm (0.8 in)
1989	26.6 mm (1.0 in)
1990	23.6 mm (0.9 in)
1991	35.1 mm (1.4 in)
1992	43.8 mm (1.7 in)
1993	61.9 mm (2.4 in)
1994	20.5 mm (0.8 in)
1995	36.0 mm (1.4 in)
1996	28.0 mm (1.1 in)
1997	21.3 mm (0.8 in)
1998	28.8 mm (1.1 in)
1999	32.5 mm (1.3 in)
2000	37.4 mm (1.5 in)
2001	27.9 mm (1.1 in)
2002	23.5 mm (0.9 in)
2003	15.7 mm (0.6 in)
2004	30.8 mm (1.2 in)
2005	27.2 mm (1.1 in)
2006	15.9 mm (0.6 in)
2007	30.5 mm (1.2 in)
2008	25.7 mm (1.0 in)
2009	25.2 mm (1.0 in)
2010	26.7 mm (1.1 in)
2011	35.8 mm (1.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Orrbyn, 1964 to 2011. The record is 97.2 mm (3.8 in) in 1993, marked on the chart; the median year is 50.9 mm (2.0 in).

Wettest five days (Rx5day) at Orrbyn by year
Year	Wettest five days (Rx5day)
1964	36.3 mm (1.4 in)
1965	51.5 mm (2.0 in)
1966	69.3 mm (2.7 in)
1967	67.7 mm (2.7 in)
1968	52.0 mm (2.0 in)
1969	53.4 mm (2.1 in)
1970	87.9 mm (3.5 in)
1971	39.3 mm (1.5 in)
1972	54.5 mm (2.1 in)
1973	28.6 mm (1.1 in)
1974	33.5 mm (1.3 in)
1975	53.9 mm (2.1 in)
1976	36.0 mm (1.4 in)
1977	68.0 mm (2.7 in)
1978	78.0 mm (3.1 in)
1979	47.1 mm (1.9 in)
1980	58.7 mm (2.3 in)
1981	36.1 mm (1.4 in)
1982	40.1 mm (1.6 in)
1983	36.4 mm (1.4 in)
1984	48.2 mm (1.9 in)
1985	43.9 mm (1.7 in)
1986	42.9 mm (1.7 in)
1987	78.8 mm (3.1 in)
1988	37.3 mm (1.5 in)
1989	40.3 mm (1.6 in)
1990	34.1 mm (1.3 in)
1991	54.6 mm (2.1 in)
1992	59.9 mm (2.4 in)
1993	97.2 mm (3.8 in)
1994	41.2 mm (1.6 in)
1995	45.8 mm (1.8 in)
1996	64.4 mm (2.5 in)
1997	45.7 mm (1.8 in)
1998	62.5 mm (2.5 in)
1999	50.2 mm (2.0 in)
2000	56.5 mm (2.2 in)
2001	47.1 mm (1.9 in)
2002	39.8 mm (1.6 in)
2003	38.7 mm (1.5 in)
2004	64.6 mm (2.5 in)
2005	75.6 mm (3.0 in)
2006	40.7 mm (1.6 in)
2007	69.8 mm (2.7 in)
2008	67.6 mm (2.7 in)
2009	36.0 mm (1.4 in)
2010	51.6 mm (2.0 in)
2011	81.8 mm (3.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Orrbyn, 1964 to 2011. The record is 39 days in 1970, marked on the chart; the median year is 22 days.

Longest dry spell (CDD) at Orrbyn by year
Year	Longest dry spell (CDD)
1964	13 days
1965	27 days
1966	16 days
1967	26 days
1968	21 days
1969	23 days
1970	39 days
1971	26 days
1972	34 days
1973	16 days
1974	33 days
1975	19 days
1976	26 days
1977	24 days
1978	27 days
1979	18 days
1980	22 days
1981	24 days
1982	14 days
1983	21 days
1984	24 days
1985	26 days
1986	21 days
1987	23 days
1988	15 days
1989	14 days
1990	17 days
1991	23 days
1992	21 days
1993	16 days
1994	23 days
1995	22 days
1996	24 days
1997	18 days
1998	18 days
1999	20 days
2000	28 days
2001	16 days
2002	17 days
2003	22 days
2004	14 days
2005	24 days
2006	25 days
2007	17 days
2008	22 days
2009	21 days
2010	22 days
2011	23 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

43 years with a frost

Across 43 years with a frost, the median last spring frost at Orrbyn falls on 3 June and the median first autumn frost on 28 August, which leaves a median of 87 days between them.

Fitted over all years, the growing season changes by 0.0 days per decade at this station.

Frost dates and growing season at Orrbyn
Measure	Median, all years	Earliest period	Recent period (1978 to 2010)	Recent against earliest	Fitted trend
Last spring frost	3 June	n/a	3 June	n/a	+0.4 days per decade
First autumn frost	28 August	n/a	30 August	n/a	+0.4 days per decade
Growing days	87 days	n/a	86 days	n/a	0.0 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

46 years, 1965 to 2010

A day with at least 27.4 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 64.1 mm (2.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Orrbyn: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	27.4 mm (1.1 in)
5 years	36.2 mm (1.4 in)
10 years	42.4 mm (1.7 in)
25 years	50.7 mm (2.0 in)
50 years	57.3 mm (2.3 in)	Longer than the 46 years of record
100 years	64.1 mm (2.5 in)	Longer than the 46 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, 46 years of values from 1965 to 2010.

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: 61.9 mm (2.4 in) in 1993; 54.7 mm (2.2 in) in 1967; 50.7 mm (2.0 in) in 1978.

Station Changes

2 suspected

2 changes were suspected in the annual mean temperature of Orrbyn, at 1978 and 2003. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1978 ran 0.2 C (0.3 F) lower than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 2003 ran 0.2 C (0.3 F) lower than in the years before (likely change).

Suspected changes in the annual mean temperature at Orrbyn, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1978	-0.2	-0.3	likely	5
2003	-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 Orrbyn standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Orrbyn 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).