Postojna Weather Records (SIE00115076)
Record envelope, standing records and threshold days for Postojna (SIE00115076), Slovenia, with 63 years of record.
Key Facts for Postojna
- Postojna (SIE00115076) is a weather station in Slovenia at 45.80 latitude and 14.20 longitude, 533 m (1,749 ft) above sea level.
- The station reports from 1961 to 2023, 63 years of record.
- 1,464 records set at Postojna still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Postojna set a daily record high minimum temperature of 19.0 C (66.2 F) on 24 August 2023.
About the Station
- Location: Slovenia, 45.80 latitude, 14.20 longitude.
- Elevation: 533 m (1,749 ft).
- Period of record: 1961 to 2023, 63 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 | 17.1 C (62.8 F) | -26.4 C (-15.5 F) | n/a | n/a |
| Feb | 21.5 C (70.7 F) | -21.8 C (-7.2 F) | n/a | n/a |
| Mar | 23.6 C (74.5 F) | -19.5 C (-3.1 F) | n/a | n/a |
| Apr | 27.9 C (82.2 F) | -12.1 C (10.2 F) | n/a | n/a |
| May | 31.6 C (88.9 F) | -3.1 C (26.4 F) | n/a | n/a |
| Jun | 34.6 C (94.3 F) | 0.2 C (32.4 F) | n/a | n/a |
| Jul | 35.6 C (96.1 F) | 3.3 C (37.9 F) | n/a | n/a |
| Aug | 36.4 C (97.5 F) | 1.8 C (35.2 F) | n/a | n/a |
| Sep | 31.2 C (88.2 F) | -2.0 C (28.4 F) | n/a | n/a |
| Oct | 26.0 C (78.8 F) | -9.6 C (14.7 F) | n/a | n/a |
| Nov | 23.7 C (74.7 F) | -17.3 C (0.9 F) | n/a | n/a |
| Dec | 16.7 C (62.1 F) | -20.7 C (-5.3 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1962 | 38 |
| 1963 | 38 |
| 1964 | 11 |
| 1965 | 19 |
| 1966 | 16 |
| 1967 | 21 |
| 1968 | 28 |
| 1969 | 21 |
| 1970 | 28 |
| 1971 | 29 |
| 1972 | 16 |
| 1973 | 27 |
| 1974 | 26 |
| 1975 | 14 |
| 1976 | 27 |
| 1977 | 22 |
| 1978 | 27 |
| 1979 | 23 |
| 1980 | 25 |
| 1981 | 25 |
| 1982 | 10 |
| 1983 | 18 |
| 1984 | 10 |
| 1985 | 41 |
| 1986 | 18 |
| 1987 | 21 |
| 1988 | 11 |
| 1989 | 26 |
| 1990 | 22 |
| 1991 | 26 |
| 1992 | 13 |
| 1993 | 25 |
| 1994 | 29 |
| 1995 | 11 |
| 1996 | 22 |
| 1997 | 26 |
| 1998 | 23 |
| 1999 | 18 |
| 2000 | 14 |
| 2001 | 21 |
| 2002 | 29 |
| 2003 | 32 |
| 2004 | 16 |
| 2005 | 19 |
| 2006 | 33 |
| 2007 | 24 |
| 2008 | 20 |
| 2009 | 19 |
| 2010 | 21 |
| 2011 | 35 |
| 2012 | 39 |
| 2013 | 35 |
| 2014 | 21 |
| 2015 | 37 |
| 2016 | 30 |
| 2017 | 15 |
| 2018 | 35 |
| 2019 | 35 |
| 2020 | 14 |
| 2021 | 20 |
| 2022 | 36 |
| 2023 | 13 |
All-Time Record Progression
7 new records| Date | Kind | Detail |
|---|---|---|
| 1992-08-19 | Record high maximum temperature | Record high maximum temperature 34.6 C (94.3 F) |
| 1994-08-11 | Record high minimum temperature | Record high minimum temperature 21.0 C (69.8 F) |
| 2003-08-05 | Record high maximum temperature | Record high maximum temperature 35.0 C (95.0 F) |
| 2010-07-17 | Record high minimum temperature | Record high minimum temperature 21.3 C (70.3 F) |
| 2011-08-23 | Record high maximum temperature | Record high maximum temperature 35.1 C (95.2 F) |
| 2012-08-21 | Record high maximum temperature | Record high maximum temperature 35.4 C (95.7 F) |
| 2013-08-04 | Record high maximum temperature | Record high maximum temperature 36.4 C (97.5 F) |
Wettest Day of Each Month
Oct: 137.0 mm (5.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 84.1 mm (3.3 in) | 27 January 1979 |
| Feb | 99.6 mm (3.9 in) | 2 February 2019 |
| Mar | 119.6 mm (4.7 in) | 29 March 2009 |
| Apr | 80.1 mm (3.2 in) | 6 April 1967 |
| May | 105.7 mm (4.2 in) | 19 May 1969 |
| Jun | 121.4 mm (4.8 in) | 4 June 1991 |
| Jul | 107.1 mm (4.2 in) | 4 July 1965 |
| Aug | 104.0 mm (4.1 in) | 31 August 2004 |
| Sep | 132.4 mm (5.2 in) | 18 September 2010 |
| Oct | 137.0 mm (5.4 in) | 8 October 1980 |
| Nov | 120.2 mm (4.7 in) | 17 November 1975 |
| Dec | 102.7 mm (4.0 in) | 22 December 2009 |
Period of Record Coverage
1962 to 2023| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 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 | 364 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 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 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | 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 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 364 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 363 | 99% | 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 | 243 | 67% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 24 August 2023 | Postojna, SI | daily high min | 19.0 C (66.2 F) | 1.6 C (2.9 F) | 33 years | 21 of 100 (Routine) |
| 22 August 2023 | Postojna, SI | daily high min | 19.8 C (67.6 F) | 1.0 C (1.8 F) | 13 years | 13 of 100 (Routine) |
| 18 August 2023 | Postojna, SI | daily high min | 18.1 C (64.6 F) | 0.5 C (0.9 F) | 29 years | 15 of 100 (Routine) |
| 5 August 2023 | Postojna, SI | daily low max | 16.4 C (61.5 F) | 0.5 C (0.9 F) | 22 years | 13 of 100 (Routine) |
| 10 July 2023 | Postojna, SI | daily high max | 32.2 C (90.0 F) | 0.5 C (0.9 F) | 54 years | 23 of 100 (Routine) |
| 9 July 2023 | Postojna, SI | daily high max | 31.4 C (88.5 F) | 0.2 C (0.4 F) | 12 years | 9 of 100 (Routine) |
| 21 May 2023 | Postojna, SI | daily high min | 13.7 C (56.7 F) | 0.1 C (0.2 F) | 16 years | 10 of 100 (Routine) |
| 13 April 2023 | Postojna, SI | daily rain | 58.4 mm (2.3 in) | 16.2 mm (0.6 in) | 44 years | 33 of 100 (Routine) |
| 9 March 2023 | Postojna, SI | daily high min | 7.8 C (46.0 F) | 0.3 C (0.5 F) | 56 years | 22 of 100 (Routine) |
| 25 February 2023 | Postojna, SI | daily high min | 7.5 C (45.5 F) | 1.7 C (3.1 F) | 55 years | 25 of 100 (Routine) |
| 19 February 2023 | Postojna, SI | daily high min | 5.8 C (42.4 F) | 1.0 C (1.8 F) | 8 years | 10 of 100 (Routine) |
| 15 January 2023 | Postojna, SI | daily rain | 46.9 mm (1.8 in) | 27.6 mm (1.1 in) | 57 years | 46 of 100 (Notable) |
| 3 January 2023 | Postojna, SI | daily high min | 8.2 C (46.8 F) | 1.8 C (3.2 F) | 39 years | 20 of 100 (Routine) |
| 2 January 2023 | Postojna, SI | daily high min | 8.0 C (46.4 F) | 3.6 C (6.5 F) | 24 years | 20 of 100 (Routine) |
| 1 January 2023 | Postojna, SI | daily high min | 8.3 C (46.9 F) | 1.7 C (3.1 F) | 40 years | 21 of 100 (Routine) |
| 31 December 2022 | Postojna, SI | daily high min | 8.8 C (47.8 F) | 1.9 C (3.4 F) | 40 years | 21 of 100 (Routine) |
| 30 December 2022 | Postojna, SI | daily high min | 7.4 C (45.3 F) | 2.8 C (5.0 F) | 44 years | 24 of 100 (Routine) |
| 15 December 2022 | Postojna, SI | daily rain | 38.0 mm (1.5 in) | 2.7 mm (0.11 in) | 41 years | 19 of 100 (Routine) |
| 9 December 2022 | Postojna, SI | daily rain | 72.3 mm (2.8 in) | 10.9 mm (0.4 in) | 32 years | 22 of 100 (Routine) |
| 1 November 2022 | Postojna, SI | daily high max | 20.9 C (69.6 F) | 1.7 C (3.1 F) | 40 years | 21 of 100 (Routine) |
Climate Trend
61 complete years, 1962 to 2022| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1962 | 7.7 C | -1.68 C |
| 1963 | 8.2 C | -1.21 C |
| 1964 | 8.4 C | -1.05 C |
| 1965 | 7.9 C | -1.48 C |
| 1966 | 9.1 C | -0.33 C |
| 1967 | 8.9 C | -0.51 C |
| 1968 | 8.5 C | -0.86 C |
| 1969 | 8.3 C | -1.08 C |
| 1970 | 8.2 C | -1.16 C |
| 1971 | 8.5 C | -0.90 C |
| 1972 | 8.5 C | -0.92 C |
| 1973 | 8.5 C | -0.86 C |
| 1974 | 9.0 C | -0.38 C |
| 1975 | 9.4 C | -0.02 C |
| 1976 | 8.1 C | -1.29 C |
| 1977 | 8.9 C | -0.48 C |
| 1978 | 7.9 C | -1.55 C |
| 1979 | 8.8 C | -0.57 C |
| 1980 | 7.9 C | -1.50 C |
| 1981 | 8.6 C | -0.85 C |
| 1982 | 9.3 C | -0.12 C |
| 1983 | 9.1 C | -0.32 C |
| 1984 | 8.4 C | -1.01 C |
| 1985 | 8.5 C | -0.93 C |
| 1986 | 8.5 C | -0.87 C |
| 1987 | 8.6 C | -0.80 C |
| 1988 | 9.5 C | +0.12 C |
| 1989 | 9.6 C | +0.24 C |
| 1990 | 9.7 C | +0.31 C |
| 1991 | 8.9 C | -0.50 C |
| 1992 | 9.9 C | +0.47 C |
| 1993 | 9.1 C | -0.30 C |
| 1994 | 10.6 C | +1.16 C |
| 1995 | 9.2 C | -0.19 C |
| 1996 | 8.2 C | -1.16 C |
| 1997 | 9.4 C | -0.05 C |
| 1998 | 9.6 C | +0.15 C |
| 1999 | 9.5 C | +0.09 C |
| 2000 | 10.0 C | +0.58 C |
| 2001 | 9.7 C | +0.28 C |
| 2002 | 10.4 C | +1.03 C |
| 2003 | 10.0 C | +0.64 C |
| 2004 | 9.3 C | -0.07 C |
| 2005 | 9.1 C | -0.34 C |
| 2006 | 10.0 C | +0.59 C |
| 2007 | 10.5 C | +1.14 C |
| 2008 | 10.4 C | +1.03 C |
| 2009 | 10.4 C | +1.02 C |
| 2010 | 9.3 C | -0.15 C |
| 2011 | 10.4 C | +1.02 C |
| 2012 | 10.6 C | +1.15 C |
| 2013 | 10.3 C | +0.90 C |
| 2014 | 11.2 C | +1.77 C |
| 2015 | 10.9 C | +1.50 C |
| 2016 | 10.7 C | +1.27 C |
| 2017 | 10.4 C | +0.96 C |
| 2018 | 11.2 C | +1.78 C |
| 2019 | 11.3 C | +1.87 C |
| 2020 | 10.9 C | +1.48 C |
| 2021 | 10.2 C | +0.75 C |
| 2022 | 11.4 C | +1.98 C |
The annual mean temperature here has risen by 0.5 C (0.4 to 0.6) per decade over 1962 to 2022. In Fahrenheit: 0.9 F (0.7 to 1.0) per decade. The slope is a straight line fitted to 61 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.5 C (0.4 to 0.6) per decade | 0.9 F (0.7 to 1.0) per decade | 1962 to 2022 | 61 | Rise |
| Mean daily maximum | 0.6 C (0.5 to 0.7) per decade | 1.0 F (0.9 to 1.2) per decade | 1962 to 2022 | 61 | Rise |
| Mean daily minimum | 0.4 C (0.3 to 0.5) per decade | 0.7 F (0.5 to 0.8) per decade | 1962 to 2022 | 61 | 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
1961 to 2023| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 36.4 C (97.5 F) | 2013 | 31.8 C (89.2 F) | 62 |
| Coldest night (TNn) | -26.4 C (-15.5 F) | 1968 | -14.0 C (6.8 F) | 62 |
| Wettest day (Rx1day) | 137.0 mm (5.4 in) | 1980 | 77.5 mm (3.1 in) | 63 |
| Wettest five days (Rx5day) | 268.3 mm (10.6 in) | 2009 | 145.6 mm (5.7 in) | 62 |
| Longest dry spell (CDD) | 51 days | 1989 | 23 days | 62 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1961 | n/a |
| 1962 | 31.0 C (87.8 F) |
| 1963 | 30.7 C (87.3 F) |
| 1964 | 29.4 C (84.9 F) |
| 1965 | 31.2 C (88.2 F) |
| 1966 | 29.8 C (85.6 F) |
| 1967 | 30.3 C (86.5 F) |
| 1968 | 31.7 C (89.1 F) |
| 1969 | 31.6 C (88.9 F) |
| 1970 | 31.0 C (87.8 F) |
| 1971 | 32.3 C (90.1 F) |
| 1972 | 31.6 C (88.9 F) |
| 1973 | 31.2 C (88.2 F) |
| 1974 | 32.7 C (90.9 F) |
| 1975 | 28.4 C (83.1 F) |
| 1976 | 29.8 C (85.6 F) |
| 1977 | 28.9 C (84.0 F) |
| 1978 | 27.5 C (81.5 F) |
| 1979 | 29.3 C (84.7 F) |
| 1980 | 31.0 C (87.8 F) |
| 1981 | 30.8 C (87.4 F) |
| 1982 | 29.2 C (84.6 F) |
| 1983 | 33.8 C (92.8 F) |
| 1984 | 30.0 C (86.0 F) |
| 1985 | 30.5 C (86.9 F) |
| 1986 | 30.5 C (86.9 F) |
| 1987 | 30.5 C (86.9 F) |
| 1988 | 32.5 C (90.5 F) |
| 1989 | 29.6 C (85.3 F) |
| 1990 | 30.2 C (86.4 F) |
| 1991 | 32.0 C (89.6 F) |
| 1992 | 34.6 C (94.3 F) |
| 1993 | 33.0 C (91.4 F) |
| 1994 | 32.6 C (90.7 F) |
| 1995 | 31.4 C (88.5 F) |
| 1996 | 31.0 C (87.8 F) |
| 1997 | 29.4 C (84.9 F) |
| 1998 | 33.0 C (91.4 F) |
| 1999 | 30.0 C (86.0 F) |
| 2000 | 32.7 C (90.9 F) |
| 2001 | 31.9 C (89.4 F) |
| 2002 | 32.0 C (89.6 F) |
| 2003 | 35.0 C (95.0 F) |
| 2004 | 32.0 C (89.6 F) |
| 2005 | 34.0 C (93.2 F) |
| 2006 | 35.0 C (95.0 F) |
| 2007 | 34.6 C (94.3 F) |
| 2008 | 31.2 C (88.2 F) |
| 2009 | 32.4 C (90.3 F) |
| 2010 | 33.2 C (91.8 F) |
| 2011 | 35.1 C (95.2 F) |
| 2012 | 35.4 C (95.7 F) |
| 2013 | 36.4 C (97.5 F) |
| 2014 | 31.9 C (89.4 F) |
| 2015 | 34.5 C (94.1 F) |
| 2016 | 31.4 C (88.5 F) |
| 2017 | 35.7 C (96.3 F) |
| 2018 | 32.9 C (91.2 F) |
| 2019 | 34.6 C (94.3 F) |
| 2020 | 32.6 C (90.7 F) |
| 2021 | 33.1 C (91.6 F) |
| 2022 | 35.6 C (96.1 F) |
| 2023 | 34.1 C (93.4 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1961 | n/a |
| 1962 | -16.6 C (2.1 F) |
| 1963 | -20.8 C (-5.4 F) |
| 1964 | -14.6 C (5.7 F) |
| 1965 | -16.5 C (2.3 F) |
| 1966 | -12.7 C (9.1 F) |
| 1967 | -20.3 C (-4.5 F) |
| 1968 | -26.4 C (-15.5 F) |
| 1969 | -21.8 C (-7.2 F) |
| 1970 | -18.2 C (-0.8 F) |
| 1971 | -17.3 C (0.9 F) |
| 1972 | -12.5 C (9.5 F) |
| 1973 | -20.7 C (-5.3 F) |
| 1974 | -8.3 C (17.1 F) |
| 1975 | -11.1 C (12.0 F) |
| 1976 | -16.8 C (1.8 F) |
| 1977 | -12.3 C (9.9 F) |
| 1978 | -13.7 C (7.3 F) |
| 1979 | -18.8 C (-1.8 F) |
| 1980 | -19.0 C (-2.2 F) |
| 1981 | -22.7 C (-8.9 F) |
| 1982 | -13.2 C (8.2 F) |
| 1983 | -15.7 C (3.7 F) |
| 1984 | -12.1 C (10.2 F) |
| 1985 | -23.7 C (-10.7 F) |
| 1986 | -14.0 C (6.8 F) |
| 1987 | -15.6 C (3.9 F) |
| 1988 | -11.0 C (12.2 F) |
| 1989 | -14.0 C (6.8 F) |
| 1990 | -13.6 C (7.5 F) |
| 1991 | -14.0 C (6.8 F) |
| 1992 | -12.5 C (9.5 F) |
| 1993 | -12.0 C (10.4 F) |
| 1994 | -10.4 C (13.3 F) |
| 1995 | -12.6 C (9.3 F) |
| 1996 | -14.0 C (6.8 F) |
| 1997 | -9.8 C (14.4 F) |
| 1998 | -18.0 C (-0.4 F) |
| 1999 | -15.6 C (3.9 F) |
| 2000 | -16.8 C (1.8 F) |
| 2001 | -15.5 C (4.1 F) |
| 2002 | -10.7 C (12.7 F) |
| 2003 | -15.0 C (5.0 F) |
| 2004 | -15.3 C (4.5 F) |
| 2005 | -19.5 C (-3.1 F) |
| 2006 | -14.6 C (5.7 F) |
| 2007 | -11.6 C (11.1 F) |
| 2008 | -11.6 C (11.1 F) |
| 2009 | -18.0 C (-0.4 F) |
| 2010 | -19.0 C (-2.2 F) |
| 2011 | -12.0 C (10.4 F) |
| 2012 | -18.1 C (-0.6 F) |
| 2013 | -10.5 C (13.1 F) |
| 2014 | -8.9 C (16.0 F) |
| 2015 | -12.9 C (8.8 F) |
| 2016 | -12.0 C (10.4 F) |
| 2017 | -14.6 C (5.7 F) |
| 2018 | -15.5 C (4.1 F) |
| 2019 | -10.0 C (14.0 F) |
| 2020 | -9.6 C (14.7 F) |
| 2021 | -12.1 C (10.2 F) |
| 2022 | -12.2 C (10.0 F) |
| 2023 | -9.0 C (15.8 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1961 | 55.2 mm (2.2 in) |
| 1962 | 63.8 mm (2.5 in) |
| 1963 | 81.3 mm (3.2 in) |
| 1964 | 89.1 mm (3.5 in) |
| 1965 | 107.1 mm (4.2 in) |
| 1966 | 67.2 mm (2.6 in) |
| 1967 | 80.1 mm (3.2 in) |
| 1968 | 72.8 mm (2.9 in) |
| 1969 | 105.7 mm (4.2 in) |
| 1970 | 72.6 mm (2.9 in) |
| 1971 | 74.6 mm (2.9 in) |
| 1972 | 67.6 mm (2.7 in) |
| 1973 | 86.3 mm (3.4 in) |
| 1974 | 69.4 mm (2.7 in) |
| 1975 | 120.2 mm (4.7 in) |
| 1976 | 100.0 mm (3.9 in) |
| 1977 | 89.7 mm (3.5 in) |
| 1978 | 109.4 mm (4.3 in) |
| 1979 | 93.5 mm (3.7 in) |
| 1980 | 137.0 mm (5.4 in) |
| 1981 | 61.0 mm (2.4 in) |
| 1982 | 82.0 mm (3.2 in) |
| 1983 | 69.0 mm (2.7 in) |
| 1984 | 50.0 mm (2.0 in) |
| 1985 | 66.3 mm (2.6 in) |
| 1986 | 79.0 mm (3.1 in) |
| 1987 | 100.0 mm (3.9 in) |
| 1988 | 108.0 mm (4.3 in) |
| 1989 | 90.5 mm (3.6 in) |
| 1990 | 76.0 mm (3.0 in) |
| 1991 | 121.4 mm (4.8 in) |
| 1992 | 95.0 mm (3.7 in) |
| 1993 | 99.6 mm (3.9 in) |
| 1994 | 65.6 mm (2.6 in) |
| 1995 | 76.8 mm (3.0 in) |
| 1996 | 77.2 mm (3.0 in) |
| 1997 | 104.0 mm (4.1 in) |
| 1998 | 72.5 mm (2.9 in) |
| 1999 | 81.4 mm (3.2 in) |
| 2000 | 73.9 mm (2.9 in) |
| 2001 | 90.5 mm (3.6 in) |
| 2002 | 61.0 mm (2.4 in) |
| 2003 | 96.0 mm (3.8 in) |
| 2004 | 104.0 mm (4.1 in) |
| 2005 | 65.0 mm (2.6 in) |
| 2006 | 70.0 mm (2.8 in) |
| 2007 | 65.5 mm (2.6 in) |
| 2008 | 77.5 mm (3.1 in) |
| 2009 | 119.6 mm (4.7 in) |
| 2010 | 132.4 mm (5.2 in) |
| 2011 | 70.6 mm (2.8 in) |
| 2012 | 68.7 mm (2.7 in) |
| 2013 | 84.5 mm (3.3 in) |
| 2014 | 76.4 mm (3.0 in) |
| 2015 | 65.0 mm (2.6 in) |
| 2016 | 59.0 mm (2.3 in) |
| 2017 | 68.0 mm (2.7 in) |
| 2018 | 88.9 mm (3.5 in) |
| 2019 | 99.6 mm (3.9 in) |
| 2020 | 69.8 mm (2.7 in) |
| 2021 | 63.1 mm (2.5 in) |
| 2022 | 72.3 mm (2.8 in) |
| 2023 | 94.7 mm (3.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1961 | n/a |
| 1962 | 113.1 mm (4.5 in) |
| 1963 | 125.6 mm (4.9 in) |
| 1964 | 144.9 mm (5.7 in) |
| 1965 | 208.5 mm (8.2 in) |
| 1966 | 110.1 mm (4.3 in) |
| 1967 | 130.3 mm (5.1 in) |
| 1968 | 152.3 mm (6.0 in) |
| 1969 | 129.6 mm (5.1 in) |
| 1970 | 105.2 mm (4.1 in) |
| 1971 | 128.4 mm (5.1 in) |
| 1972 | 136.3 mm (5.4 in) |
| 1973 | 180.2 mm (7.1 in) |
| 1974 | 132.5 mm (5.2 in) |
| 1975 | 139.1 mm (5.5 in) |
| 1976 | 143.7 mm (5.7 in) |
| 1977 | 254.1 mm (10.0 in) |
| 1978 | 185.4 mm (7.3 in) |
| 1979 | 191.5 mm (7.5 in) |
| 1980 | 214.9 mm (8.5 in) |
| 1981 | 118.5 mm (4.7 in) |
| 1982 | 146.3 mm (5.8 in) |
| 1983 | 165.3 mm (6.5 in) |
| 1984 | 161.5 mm (6.4 in) |
| 1985 | 177.0 mm (7.0 in) |
| 1986 | 150.7 mm (5.9 in) |
| 1987 | 186.6 mm (7.3 in) |
| 1988 | 149.8 mm (5.9 in) |
| 1989 | 149.1 mm (5.9 in) |
| 1990 | 118.1 mm (4.6 in) |
| 1991 | 200.4 mm (7.9 in) |
| 1992 | 180.9 mm (7.1 in) |
| 1993 | 181.4 mm (7.1 in) |
| 1994 | 109.2 mm (4.3 in) |
| 1995 | 164.2 mm (6.5 in) |
| 1996 | 150.6 mm (5.9 in) |
| 1997 | 205.7 mm (8.1 in) |
| 1998 | 155.2 mm (6.1 in) |
| 1999 | 109.8 mm (4.3 in) |
| 2000 | 146.3 mm (5.8 in) |
| 2001 | 153.0 mm (6.0 in) |
| 2002 | 114.6 mm (4.5 in) |
| 2003 | 119.7 mm (4.7 in) |
| 2004 | 104.1 mm (4.1 in) |
| 2005 | 120.3 mm (4.7 in) |
| 2006 | 130.6 mm (5.1 in) |
| 2007 | 111.4 mm (4.4 in) |
| 2008 | 123.3 mm (4.9 in) |
| 2009 | 268.3 mm (10.6 in) |
| 2010 | 234.7 mm (9.2 in) |
| 2011 | 104.5 mm (4.1 in) |
| 2012 | 86.2 mm (3.4 in) |
| 2013 | 112.4 mm (4.4 in) |
| 2014 | 165.0 mm (6.5 in) |
| 2015 | 120.9 mm (4.8 in) |
| 2016 | 101.3 mm (4.0 in) |
| 2017 | 166.2 mm (6.5 in) |
| 2018 | 135.1 mm (5.3 in) |
| 2019 | 153.9 mm (6.1 in) |
| 2020 | 146.6 mm (5.8 in) |
| 2021 | 131.3 mm (5.2 in) |
| 2022 | 148.5 mm (5.8 in) |
| 2023 | 139.1 mm (5.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1961 | n/a |
| 1962 | 31 days |
| 1963 | 24 days |
| 1964 | 47 days |
| 1965 | 36 days |
| 1966 | 15 days |
| 1967 | 14 days |
| 1968 | 21 days |
| 1969 | 23 days |
| 1970 | 17 days |
| 1971 | 25 days |
| 1972 | 22 days |
| 1973 | 42 days |
| 1974 | 35 days |
| 1975 | 22 days |
| 1976 | 23 days |
| 1977 | 22 days |
| 1978 | 50 days |
| 1979 | 38 days |
| 1980 | 28 days |
| 1981 | 19 days |
| 1982 | 18 days |
| 1983 | 21 days |
| 1984 | 21 days |
| 1985 | 25 days |
| 1986 | 22 days |
| 1987 | 25 days |
| 1988 | 26 days |
| 1989 | 51 days |
| 1990 | 24 days |
| 1991 | 23 days |
| 1992 | 22 days |
| 1993 | 24 days |
| 1994 | 23 days |
| 1995 | 24 days |
| 1996 | 21 days |
| 1997 | 21 days |
| 1998 | 34 days |
| 1999 | 17 days |
| 2000 | 24 days |
| 2001 | 18 days |
| 2002 | 22 days |
| 2003 | 25 days |
| 2004 | 15 days |
| 2005 | 24 days |
| 2006 | 17 days |
| 2007 | 33 days |
| 2008 | 24 days |
| 2009 | 22 days |
| 2010 | 12 days |
| 2011 | 24 days |
| 2012 | 45 days |
| 2013 | 19 days |
| 2014 | 19 days |
| 2015 | 39 days |
| 2016 | 34 days |
| 2017 | 29 days |
| 2018 | 15 days |
| 2019 | 21 days |
| 2020 | 23 days |
| 2021 | 20 days |
| 2022 | 32 days |
| 2023 | 29 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
61 years with a frostAcross 61 years with a frost, the median last spring frost at Postojna falls on 26 April and the median first autumn frost on 18 October, which leaves a median of 176 days between them.
In 1993 to 2022 the median growing season was 186 days. That is 19 days more than in 1962 to 1991.
Fitted over all years, the growing season changes by +5.2 days per decade at this station.
| Measure | Median, all years | Earliest period (1962 to 1991) | Recent period (1993 to 2022) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 26 April | 3 May | 22 April | 11 days earlier | -2.9 days per decade |
| First autumn frost | 18 October | 19 October | 19 October | no change | +2.3 days per decade |
| Growing days | 176 days | 167 days | 186 days | 19 days more | +5.2 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
61 years, 1962 to 2022A day with at least 79.9 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 150.4 mm (5.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 79.9 mm (3.1 in) | |
| 5 years | 97.3 mm (3.8 in) | |
| 10 years | 109.4 mm (4.3 in) | |
| 25 years | 125.4 mm (4.9 in) | |
| 50 years | 137.7 mm (5.4 in) | |
| 100 years | 150.4 mm (5.9 in) | Longer than the 61 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, 61 years of values from 1962 to 2022.
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: 137.0 mm (5.4 in) in 1980; 132.4 mm (5.2 in) in 2010; 121.4 mm (4.8 in) in 1991.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Postojna, at 1992. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1992 ran 0.2 C (0.3 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1992 | -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.
Climate Twins
2008 to 2022 against 1961 to 1990Over 2008 to 2022, Postojna had a mean temperature of 10.6 C (51.1 F) and 1,499.8 mm (59.0 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Celo 2 S (United States, 7,683 km away), Transou (United States, 7,582 km away) and Boone (United States, 7,620 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Celo 2 S | United States | 7,683 km (4,774 mi) | 10.6 C (51.1 F) | 1,492.8 mm (58.8 in) | 0.64 |
| Transou | United States | 7,582 km (4,711 mi) | 10.3 C (50.5 F) | 1,396.6 mm (55.0 in) | 0.90 |
| Boone | United States | 7,620 km (4,735 mi) | 10.5 C (50.8 F) | 1,395.8 mm (55.0 in) | 0.94 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
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).