Birr Weather Records (EI000003965)
Record envelope, standing records and threshold days for Birr (EI000003965), Ireland, with 56 years of record.
Key Facts for Birr
- Birr (EI000003965) is a weather station in Ireland at 53.09 latitude and -7.88 longitude, 70 m (230 ft) above sea level.
- The station reports from 1954 to 2009, 56 years of record.
- 1,464 records set at Birr still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Birr set a daily record low minimum temperature of 3.1 C (37.6 F) on 11 September 2009.
About the Station
- Location: Ireland, 53.09 latitude, -7.88 longitude.
- Elevation: 70 m (230 ft).
- Period of record: 1954 to 2009, 56 years.
- Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 14.5 C (58.1 F) | -14.6 C (5.7 F) | n/a | n/a |
| Feb | 15.5 C (59.9 F) | -10.5 C (13.1 F) | n/a | n/a |
| Mar | 19.7 C (67.5 F) | -10.5 C (13.1 F) | n/a | n/a |
| Apr | 23.7 C (74.7 F) | -4.7 C (23.5 F) | n/a | n/a |
| May | 25.7 C (78.3 F) | -2.3 C (27.9 F) | n/a | n/a |
| Jun | 31.2 C (88.2 F) | -0.3 C (31.5 F) | n/a | n/a |
| Jul | 30.8 C (87.4 F) | 3.1 C (37.6 F) | n/a | n/a |
| Aug | 29.4 C (84.9 F) | 1.2 C (34.2 F) | n/a | n/a |
| Sep | 26.3 C (79.3 F) | -1.1 C (30.0 F) | n/a | n/a |
| Oct | 23.2 C (73.8 F) | -5.2 C (22.6 F) | n/a | n/a |
| Nov | 17.5 C (63.5 F) | -7.2 C (19.0 F) | n/a | n/a |
| Dec | 15.3 C (59.5 F) | -9.4 C (15.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1955 | 44 |
| 1956 | 25 |
| 1957 | 36 |
| 1958 | 26 |
| 1959 | 39 |
| 1960 | 22 |
| 1961 | 25 |
| 1962 | 20 |
| 1963 | 31 |
| 1964 | 18 |
| 1965 | 32 |
| 1966 | 22 |
| 1967 | 19 |
| 1968 | 17 |
| 1969 | 34 |
| 1970 | 21 |
| 1971 | 20 |
| 1972 | 23 |
| 1973 | 19 |
| 1974 | 18 |
| 1975 | 28 |
| 1976 | 30 |
| 1977 | 23 |
| 1978 | 28 |
| 1979 | 28 |
| 1980 | 23 |
| 1981 | 25 |
| 1982 | 12 |
| 1983 | 33 |
| 1984 | 30 |
| 1985 | 28 |
| 1986 | 43 |
| 1987 | 31 |
| 1988 | 24 |
| 1989 | 49 |
| 1990 | 22 |
| 1991 | 29 |
| 1992 | 26 |
| 1993 | 23 |
| 1994 | 17 |
| 1995 | 52 |
| 1996 | 25 |
| 1997 | 37 |
| 1998 | 28 |
| 1999 | 15 |
| 2000 | 24 |
| 2001 | 22 |
| 2002 | 14 |
| 2003 | 30 |
| 2004 | 26 |
| 2005 | 31 |
| 2006 | 27 |
| 2007 | 25 |
| 2008 | 29 |
| 2009 | 16 |
Wettest Day of Each Month
Aug: 59.1 mm (2.3 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 39.2 mm (1.5 in) | 7 January 2005 |
| Feb | 28.0 mm (1.1 in) | 5 February 1990 |
| Mar | 22.0 mm (0.9 in) | 25 March 1996 |
| Apr | 30.9 mm (1.2 in) | 12 April 1961 |
| May | 19.7 mm (0.8 in) | 1 May 1983 |
| Jun | 41.1 mm (1.6 in) | 11 June 1993 |
| Jul | 44.5 mm (1.8 in) | 31 July 1991 |
| Aug | 59.1 mm (2.3 in) | 2 August 1984 |
| Sep | 35.7 mm (1.4 in) | 20 September 2006 |
| Oct | 33.8 mm (1.3 in) | 11 October 1976 |
| Nov | 34.6 mm (1.4 in) | 1 November 1968 |
| Dec | 37.5 mm (1.5 in) | 8 December 1983 |
Period of Record Coverage
1954 to 2009| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1954 | 91 | 25% | No |
| 1955 | 362 | 99% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 360 | 99% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 364 | 99% | Yes |
| 1961 | 362 | 99% | Yes |
| 1962 | 362 | 99% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 363 | 99% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 361 | 99% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 362 | 99% | Yes |
| 1969 | 361 | 99% | Yes |
| 1970 | 362 | 99% | Yes |
| 1971 | 359 | 98% | Yes |
| 1972 | 364 | 99% | Yes |
| 1973 | 360 | 99% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 363 | 99% | Yes |
| 1976 | 364 | 99% | Yes |
| 1977 | 362 | 99% | Yes |
| 1978 | 361 | 99% | Yes |
| 1979 | 361 | 99% | Yes |
| 1980 | 361 | 99% | Yes |
| 1981 | 361 | 99% | Yes |
| 1982 | 359 | 98% | Yes |
| 1983 | 361 | 99% | Yes |
| 1984 | 363 | 99% | Yes |
| 1985 | 363 | 99% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 363 | 99% | Yes |
| 1988 | 364 | 99% | Yes |
| 1989 | 362 | 99% | Yes |
| 1990 | 362 | 99% | Yes |
| 1991 | 362 | 99% | Yes |
| 1992 | 362 | 99% | Yes |
| 1993 | 362 | 99% | Yes |
| 1994 | 363 | 99% | Yes |
| 1995 | 360 | 99% | Yes |
| 1996 | 364 | 99% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 364 | 100% | Yes |
| 2000 | 333 | 91% | Yes |
| 2001 | 334 | 92% | Yes |
| 2002 | 364 | 100% | Yes |
| 2003 | 360 | 99% | Yes |
| 2004 | 362 | 99% | Yes |
| 2005 | 335 | 92% | Yes |
| 2006 | 362 | 99% | Yes |
| 2007 | 364 | 100% | Yes |
| 2008 | 361 | 99% | Yes |
| 2009 | 274 | 75% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 11 September 2009 | Birr, IE | daily low min | 3.1 C (37.6 F) | 0.7 C (1.3 F) | 36 years | 18 of 100 (Routine) |
| 31 August 2009 | Birr, IE | daily high min | 15.8 C (60.4 F) | 0.1 C (0.2 F) | 4 years | 6 of 100 (Routine) |
| 19 August 2009 | Birr, IE | daily rain | 24.1 mm (0.9 in) | 2.7 mm (0.11 in) | 51 years | 20 of 100 (Routine) |
| 19 August 2009 | Birr, IE | daily high min | 16.7 C (62.1 F) | 0.8 C (1.4 F) | 12 years | 10 of 100 (Routine) |
| 18 July 2009 | Birr, IE | daily low max | 15.2 C (59.4 F) | 0.2 C (0.4 F) | 30 years | 14 of 100 (Routine) |
| 5 July 2009 | Birr, IE | daily rain | 18.2 mm (0.7 in) | 3.2 mm (0.13 in) | 0 years | 11 of 100 (Routine) |
| 2 July 2009 | Birr, IE | daily high min | 16.3 C (61.3 F) | 0.9 C (1.6 F) | 50 years | 23 of 100 (Routine) |
| 1 July 2009 | Birr, IE | daily high min | 15.9 C (60.6 F) | 1.2 C (2.2 F) | 40 years | 21 of 100 (Routine) |
| 26 June 2009 | Birr, IE | daily high min | 14.7 C (58.5 F) | 0.6 C (1.1 F) | 32 years | 16 of 100 (Routine) |
| 23 June 2009 | Birr, IE | daily high min | 16.4 C (61.5 F) | 1.9 C (3.4 F) | 32 years | 20 of 100 (Routine) |
| 23 June 2009 | Birr, IE | daily high max | 24.7 C (76.5 F) | 0.2 C (0.4 F) | 14 years | 9 of 100 (Routine) |
| 22 June 2009 | Birr, IE | daily high min | 15.1 C (59.2 F) | 0.3 C (0.5 F) | 35 years | 16 of 100 (Routine) |
| 16 June 2009 | Birr, IE | daily rain | 29.1 mm (1.1 in) | 19.0 mm (0.7 in) | 11 years | 47 of 100 (Notable) |
| 6 June 2009 | Birr, IE | daily low min | 3.4 C (38.1 F) | 1.3 C (2.3 F) | 0 years | 9 of 100 (Routine) |
| 2 June 2009 | Birr, IE | daily high max | 27.5 C (81.5 F) | 4.2 C (7.6 F) | 24 years | 26 of 100 (Routine) |
| 1 June 2009 | Birr, IE | daily high max | 25.2 C (77.4 F) | 0.6 C (1.1 F) | 46 years | 20 of 100 (Routine) |
| 30 May 2009 | Birr, IE | daily high min | 12.3 C (54.1 F) | 1.1 C (2.0 F) | 0 years | 8 of 100 (Routine) |
| 23 May 2009 | Birr, IE | daily high min | 11.5 C (52.7 F) | 0.1 C (0.2 F) | 20 years | 11 of 100 (Routine) |
| 27 April 2009 | Birr, IE | daily rain | 13.7 mm (0.5 in) | 0.8 mm (0.03 in) | 7 years | 9 of 100 (Routine) |
| 9 April 2009 | Birr, IE | daily rain | 17.2 mm (0.7 in) | 3.0 mm (0.12 in) | 18 years | 17 of 100 (Routine) |
Climate Trend
54 complete years, 1955 to 2008| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1955 | 9.4 C | -0.24 C |
| 1956 | 9.2 C | -0.41 C |
| 1957 | 9.9 C | +0.28 C |
| 1958 | 9.6 C | -0.02 C |
| 1959 | 10.2 C | +0.60 C |
| 1960 | 9.2 C | -0.39 C |
| 1961 | 9.6 C | -0.04 C |
| 1962 | 8.8 C | -0.84 C |
| 1963 | 8.6 C | -1.04 C |
| 1964 | 9.5 C | -0.07 C |
| 1965 | 8.8 C | -0.84 C |
| 1966 | 9.3 C | -0.25 C |
| 1967 | 9.2 C | -0.40 C |
| 1968 | 9.3 C | -0.34 C |
| 1969 | 9.0 C | -0.56 C |
| 1970 | 9.4 C | -0.24 C |
| 1971 | 9.9 C | +0.26 C |
| 1972 | 8.9 C | -0.67 C |
| 1973 | 9.7 C | +0.09 C |
| 1974 | 9.3 C | -0.31 C |
| 1975 | 10.0 C | +0.36 C |
| 1976 | 9.7 C | +0.13 C |
| 1977 | 9.3 C | -0.25 C |
| 1978 | 9.5 C | -0.05 C |
| 1979 | 8.7 C | -0.90 C |
| 1980 | 9.3 C | -0.31 C |
| 1981 | 9.5 C | -0.10 C |
| 1982 | 9.7 C | +0.10 C |
| 1983 | 10.0 C | +0.42 C |
| 1984 | 9.6 C | +0.02 C |
| 1985 | 8.9 C | -0.66 C |
| 1986 | 8.5 C | -1.05 C |
| 1987 | 9.3 C | -0.31 C |
| 1988 | 9.6 C | +0.04 C |
| 1989 | 10.0 C | +0.44 C |
| 1990 | 10.1 C | +0.48 C |
| 1991 | 9.6 C | +0.03 C |
| 1992 | 9.6 C | -0.04 C |
| 1993 | 9.3 C | -0.29 C |
| 1994 | 9.6 C | +0.05 C |
| 1995 | 10.3 C | +0.67 C |
| 1996 | 9.3 C | -0.28 C |
| 1997 | 10.5 C | +0.88 C |
| 1998 | 10.2 C | +0.60 C |
| 1999 | 10.2 C | +0.63 C |
| 2000 | 9.8 C | +0.17 C |
| 2001 | 9.7 C | +0.11 C |
| 2002 | 10.2 C | +0.57 C |
| 2003 | 10.2 C | +0.64 C |
| 2004 | 10.1 C | +0.55 C |
| 2005 | 10.3 C | +0.74 C |
| 2006 | 10.4 C | +0.80 C |
| 2007 | 10.5 C | +0.93 C |
| 2008 | 9.8 C | +0.18 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1955 to 2008. In Fahrenheit: 0.3 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 54 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.2 to 0.5) per decade | 1955 to 2008 | 54 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.1 to 0.5) per decade | 1955 to 2008 | 54 | Rise |
| Mean daily minimum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.2 to 0.5) per decade | 1955 to 2008 | 54 | 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
1954 to 2009| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 31.2 C (88.2 F) | 1976 | 25.6 C (78.1 F) | 56 |
| Coldest night (TNn) | -14.6 C (5.7 F) | 1982 | -6.8 C (19.8 F) | 56 |
| Wettest day (Rx1day) | 59.1 mm (2.3 in) | 1984 | 28.1 mm (1.1 in) | 56 |
| Wettest five days (Rx5day) | 84.3 mm (3.3 in) | 1984 | 50.9 mm (2.0 in) | 56 |
| Longest dry spell (CDD) | 40 days | 1986 | 18 days | 56 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1954 | 18.4 C (65.1 F) |
| 1955 | 28.9 C (84.0 F) |
| 1956 | 24.1 C (75.4 F) |
| 1957 | 28.1 C (82.6 F) |
| 1958 | 26.4 C (79.5 F) |
| 1959 | 26.3 C (79.3 F) |
| 1960 | 25.0 C (77.0 F) |
| 1961 | 24.5 C (76.1 F) |
| 1962 | 23.3 C (73.9 F) |
| 1963 | 25.7 C (78.3 F) |
| 1964 | 23.7 C (74.7 F) |
| 1965 | 22.6 C (72.7 F) |
| 1966 | 25.2 C (77.4 F) |
| 1967 | 25.4 C (77.7 F) |
| 1968 | 25.2 C (77.4 F) |
| 1969 | 27.1 C (80.8 F) |
| 1970 | 26.0 C (78.8 F) |
| 1971 | 25.1 C (77.2 F) |
| 1972 | 25.9 C (78.6 F) |
| 1973 | 28.4 C (83.1 F) |
| 1974 | 24.8 C (76.6 F) |
| 1975 | 29.3 C (84.7 F) |
| 1976 | 31.2 C (88.2 F) |
| 1977 | 26.3 C (79.3 F) |
| 1978 | 24.7 C (76.5 F) |
| 1979 | 24.1 C (75.4 F) |
| 1980 | 22.7 C (72.9 F) |
| 1981 | 25.2 C (77.4 F) |
| 1982 | 25.7 C (78.3 F) |
| 1983 | 30.8 C (87.4 F) |
| 1984 | 26.6 C (79.9 F) |
| 1985 | 23.9 C (75.0 F) |
| 1986 | 25.2 C (77.4 F) |
| 1987 | 25.3 C (77.5 F) |
| 1988 | 25.1 C (77.2 F) |
| 1989 | 29.7 C (85.5 F) |
| 1990 | 27.0 C (80.6 F) |
| 1991 | 25.6 C (78.1 F) |
| 1992 | 25.6 C (78.1 F) |
| 1993 | 24.5 C (76.1 F) |
| 1994 | 23.6 C (74.5 F) |
| 1995 | 29.7 C (85.5 F) |
| 1996 | 25.7 C (78.3 F) |
| 1997 | 25.5 C (77.9 F) |
| 1998 | 24.2 C (75.6 F) |
| 1999 | 26.7 C (80.1 F) |
| 2000 | 25.9 C (78.6 F) |
| 2001 | 25.4 C (77.7 F) |
| 2002 | 24.9 C (76.8 F) |
| 2003 | 28.5 C (83.3 F) |
| 2004 | 27.3 C (81.1 F) |
| 2005 | 28.4 C (83.1 F) |
| 2006 | 30.1 C (86.2 F) |
| 2007 | 25.6 C (78.1 F) |
| 2008 | 25.0 C (77.0 F) |
| 2009 | 27.5 C (81.5 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1954 | -4.4 C (24.1 F) |
| 1955 | -6.7 C (19.9 F) |
| 1956 | -7.3 C (18.9 F) |
| 1957 | -7.1 C (19.2 F) |
| 1958 | -6.1 C (21.0 F) |
| 1959 | -9.1 C (15.6 F) |
| 1960 | -6.6 C (20.1 F) |
| 1961 | -9.4 C (15.1 F) |
| 1962 | -8.2 C (17.2 F) |
| 1963 | -11.6 C (11.1 F) |
| 1964 | -6.7 C (19.9 F) |
| 1965 | -10.5 C (13.1 F) |
| 1966 | -6.9 C (19.6 F) |
| 1967 | -7.5 C (18.5 F) |
| 1968 | -6.4 C (20.5 F) |
| 1969 | -10.5 C (13.1 F) |
| 1970 | -8.1 C (17.4 F) |
| 1971 | -5.0 C (23.0 F) |
| 1972 | -7.2 C (19.0 F) |
| 1973 | -6.5 C (20.3 F) |
| 1974 | -4.9 C (23.2 F) |
| 1975 | -4.6 C (23.7 F) |
| 1976 | -5.3 C (22.5 F) |
| 1977 | -7.3 C (18.9 F) |
| 1978 | -9.4 C (15.1 F) |
| 1979 | -11.6 C (11.1 F) |
| 1980 | -6.3 C (20.7 F) |
| 1981 | -8.6 C (16.5 F) |
| 1982 | -14.6 C (5.7 F) |
| 1983 | -4.4 C (24.1 F) |
| 1984 | -7.7 C (18.1 F) |
| 1985 | -8.9 C (16.0 F) |
| 1986 | -6.2 C (20.8 F) |
| 1987 | -8.9 C (16.0 F) |
| 1988 | -6.9 C (19.6 F) |
| 1989 | -7.0 C (19.4 F) |
| 1990 | -5.4 C (22.3 F) |
| 1991 | -6.5 C (20.3 F) |
| 1992 | -7.5 C (18.5 F) |
| 1993 | -5.2 C (22.6 F) |
| 1994 | -6.4 C (20.5 F) |
| 1995 | -7.1 C (19.2 F) |
| 1996 | -5.8 C (21.6 F) |
| 1997 | -5.3 C (22.5 F) |
| 1998 | -5.4 C (22.3 F) |
| 1999 | -5.3 C (22.5 F) |
| 2000 | -7.8 C (18.0 F) |
| 2001 | -7.8 C (18.0 F) |
| 2002 | -7.0 C (19.4 F) |
| 2003 | -5.3 C (22.5 F) |
| 2004 | -6.4 C (20.5 F) |
| 2005 | -4.7 C (23.5 F) |
| 2006 | -7.8 C (18.0 F) |
| 2007 | -5.6 C (21.9 F) |
| 2008 | -6.2 C (20.8 F) |
| 2009 | -6.5 C (20.3 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1954 | 21.7 mm (0.9 in) |
| 1955 | 21.0 mm (0.8 in) |
| 1956 | 23.2 mm (0.9 in) |
| 1957 | 31.1 mm (1.2 in) |
| 1958 | 31.0 mm (1.2 in) |
| 1959 | 26.9 mm (1.1 in) |
| 1960 | 31.2 mm (1.2 in) |
| 1961 | 30.9 mm (1.2 in) |
| 1962 | 34.7 mm (1.4 in) |
| 1963 | 31.5 mm (1.2 in) |
| 1964 | 26.0 mm (1.0 in) |
| 1965 | 20.0 mm (0.8 in) |
| 1966 | 30.4 mm (1.2 in) |
| 1967 | 23.5 mm (0.9 in) |
| 1968 | 35.4 mm (1.4 in) |
| 1969 | 15.8 mm (0.6 in) |
| 1970 | 29.1 mm (1.1 in) |
| 1971 | 24.4 mm (1.0 in) |
| 1972 | 21.6 mm (0.9 in) |
| 1973 | 29.0 mm (1.1 in) |
| 1974 | 21.3 mm (0.8 in) |
| 1975 | 28.7 mm (1.1 in) |
| 1976 | 33.8 mm (1.3 in) |
| 1977 | 36.3 mm (1.4 in) |
| 1978 | 18.9 mm (0.7 in) |
| 1979 | 19.5 mm (0.8 in) |
| 1980 | 23.1 mm (0.9 in) |
| 1981 | 25.2 mm (1.0 in) |
| 1982 | 22.9 mm (0.9 in) |
| 1983 | 39.5 mm (1.6 in) |
| 1984 | 59.1 mm (2.3 in) |
| 1985 | 21.2 mm (0.8 in) |
| 1986 | 36.0 mm (1.4 in) |
| 1987 | 27.3 mm (1.1 in) |
| 1988 | 22.4 mm (0.9 in) |
| 1989 | 22.0 mm (0.9 in) |
| 1990 | 29.5 mm (1.2 in) |
| 1991 | 44.5 mm (1.8 in) |
| 1992 | 26.6 mm (1.0 in) |
| 1993 | 41.1 mm (1.6 in) |
| 1994 | 24.9 mm (1.0 in) |
| 1995 | 32.3 mm (1.3 in) |
| 1996 | 45.3 mm (1.8 in) |
| 1997 | 35.4 mm (1.4 in) |
| 1998 | 28.8 mm (1.1 in) |
| 1999 | 30.4 mm (1.2 in) |
| 2000 | 26.9 mm (1.1 in) |
| 2001 | 27.4 mm (1.1 in) |
| 2002 | 23.0 mm (0.9 in) |
| 2003 | 18.7 mm (0.7 in) |
| 2004 | 22.2 mm (0.9 in) |
| 2005 | 39.2 mm (1.5 in) |
| 2006 | 35.7 mm (1.4 in) |
| 2007 | 39.8 mm (1.6 in) |
| 2008 | 22.5 mm (0.9 in) |
| 2009 | 34.5 mm (1.4 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1954 | 49.5 mm (1.9 in) |
| 1955 | 49.6 mm (2.0 in) |
| 1956 | 48.3 mm (1.9 in) |
| 1957 | 47.9 mm (1.9 in) |
| 1958 | 57.5 mm (2.3 in) |
| 1959 | 68.4 mm (2.7 in) |
| 1960 | 57.2 mm (2.3 in) |
| 1961 | 83.4 mm (3.3 in) |
| 1962 | 58.6 mm (2.3 in) |
| 1963 | 43.5 mm (1.7 in) |
| 1964 | 63.9 mm (2.5 in) |
| 1965 | 48.8 mm (1.9 in) |
| 1966 | 74.5 mm (2.9 in) |
| 1967 | 46.8 mm (1.8 in) |
| 1968 | 59.0 mm (2.3 in) |
| 1969 | 36.8 mm (1.4 in) |
| 1970 | 60.9 mm (2.4 in) |
| 1971 | 36.4 mm (1.4 in) |
| 1972 | 38.0 mm (1.5 in) |
| 1973 | 67.0 mm (2.6 in) |
| 1974 | 45.4 mm (1.8 in) |
| 1975 | 50.2 mm (2.0 in) |
| 1976 | 46.6 mm (1.8 in) |
| 1977 | 62.0 mm (2.4 in) |
| 1978 | 42.6 mm (1.7 in) |
| 1979 | 43.2 mm (1.7 in) |
| 1980 | 45.0 mm (1.8 in) |
| 1981 | 54.3 mm (2.1 in) |
| 1982 | 43.0 mm (1.7 in) |
| 1983 | 50.0 mm (2.0 in) |
| 1984 | 84.3 mm (3.3 in) |
| 1985 | 50.6 mm (2.0 in) |
| 1986 | 76.6 mm (3.0 in) |
| 1987 | 43.5 mm (1.7 in) |
| 1988 | 41.7 mm (1.6 in) |
| 1989 | 48.1 mm (1.9 in) |
| 1990 | 61.5 mm (2.4 in) |
| 1991 | 48.0 mm (1.9 in) |
| 1992 | 50.2 mm (2.0 in) |
| 1993 | 77.6 mm (3.1 in) |
| 1994 | 57.6 mm (2.3 in) |
| 1995 | 74.1 mm (2.9 in) |
| 1996 | 48.8 mm (1.9 in) |
| 1997 | 76.8 mm (3.0 in) |
| 1998 | 49.4 mm (1.9 in) |
| 1999 | 61.7 mm (2.4 in) |
| 2000 | 55.7 mm (2.2 in) |
| 2001 | 53.8 mm (2.1 in) |
| 2002 | 46.8 mm (1.8 in) |
| 2003 | 38.2 mm (1.5 in) |
| 2004 | 51.2 mm (2.0 in) |
| 2005 | 56.9 mm (2.2 in) |
| 2006 | 60.5 mm (2.4 in) |
| 2007 | 75.8 mm (3.0 in) |
| 2008 | 54.9 mm (2.2 in) |
| 2009 | 53.5 mm (2.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1954 | 6 days |
| 1955 | 28 days |
| 1956 | 16 days |
| 1957 | 17 days |
| 1958 | 25 days |
| 1959 | 36 days |
| 1960 | 17 days |
| 1961 | 26 days |
| 1962 | 20 days |
| 1963 | 18 days |
| 1964 | 16 days |
| 1965 | 19 days |
| 1966 | 14 days |
| 1967 | 17 days |
| 1968 | 37 days |
| 1969 | 12 days |
| 1970 | 15 days |
| 1971 | 21 days |
| 1972 | 20 days |
| 1973 | 21 days |
| 1974 | 22 days |
| 1975 | 23 days |
| 1976 | 17 days |
| 1977 | 15 days |
| 1978 | 14 days |
| 1979 | 19 days |
| 1980 | 23 days |
| 1981 | 14 days |
| 1982 | 22 days |
| 1983 | 26 days |
| 1984 | 16 days |
| 1985 | 19 days |
| 1986 | 40 days |
| 1987 | 20 days |
| 1988 | 14 days |
| 1989 | 20 days |
| 1990 | 19 days |
| 1991 | 26 days |
| 1992 | 15 days |
| 1993 | 24 days |
| 1994 | 14 days |
| 1995 | 30 days |
| 1996 | 14 days |
| 1997 | 27 days |
| 1998 | 16 days |
| 1999 | 13 days |
| 2000 | 16 days |
| 2001 | 16 days |
| 2002 | 20 days |
| 2003 | 17 days |
| 2004 | 20 days |
| 2005 | 14 days |
| 2006 | 10 days |
| 2007 | 9 days |
| 2008 | 4 days |
| 2009 | 14 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
54 years with a frostAcross 54 years with a frost, the median last spring frost at Birr falls on 28 April and the median first autumn frost on 21 October, which leaves a median of 178 days between them.
Fitted over all years, the growing season changes by +2.6 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1979 to 2008) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 28 April | n/a | 24 April | n/a | -2.4 days per decade |
| First autumn frost | 21 October | n/a | 21 October | n/a | +0.3 days per decade |
| Growing days | 178 days | n/a | 184 days | n/a | +2.6 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
50 years, 1955 to 2004A day with at least 27.1 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 55.2 mm (2.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 27.1 mm (1.1 in) | |
| 5 years | 34.1 mm (1.3 in) | |
| 10 years | 38.9 mm (1.5 in) | |
| 25 years | 45.3 mm (1.8 in) | |
| 50 years | 50.2 mm (2.0 in) | |
| 100 years | 55.2 mm (2.2 in) | Longer than the 50 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, 50 years of values from 1955 to 2004.
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: 59.1 mm (2.3 in) in 1984; 45.3 mm (1.8 in) in 1996; 44.5 mm (1.8 in) in 1991.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Birr, at 1969 and 1985. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1969 ran 0.2 C (0.4 F) higher than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1985 ran 0.1 C (0.2 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1969 | +0.2 | +0.4 | likely | 5 |
| 1985 | -0.1 | -0.2 | 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
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 . Last revised (2025-12-31).