Arvaiheer Weather Records (MG000044288)
Record envelope, standing records and threshold days for Arvaiheer (MG000044288), Mongolia, with 70 years of record.
Key Facts for Arvaiheer
- Arvaiheer (MG000044288) is a weather station in Mongolia at 46.27 latitude and 102.78 longitude, 1,813 m (5,948 ft) above sea level.
- The station reports from 1957 to 2026, 70 years of record.
- 1,464 records set at Arvaiheer still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Arvaiheer set a daily record high minimum temperature of 7.8 C (46.0 F) on 7 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Mongolia, 46.27 latitude, 102.78 longitude.
- Elevation: 1,813 m (5,948 ft).
- Period of record: 1957 to 2026, 70 years.
- Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
7 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 6.8 C (44.2 F) | -36.1 C (-33.0 F) | 0.1 C (32.2 F) | -30.2 C (-22.4 F) |
| Feb | 12.2 C (54.0 F) | -31.7 C (-25.1 F) | 8.8 C (47.8 F) | -23.0 C (-9.4 F) |
| Mar | 18.9 C (66.0 F) | -27.7 C (-17.9 F) | 10.5 C (50.9 F) | -20.6 C (-5.1 F) |
| Apr | 28.2 C (82.8 F) | -22.6 C (-8.7 F) | 19.6 C (67.3 F) | -10.9 C (12.4 F) |
| May | 30.4 C (86.7 F) | -13.9 C (7.0 F) | 27.9 C (82.2 F) | -1.7 C (28.9 F) |
| Jun | 34.0 C (93.2 F) | -3.9 C (25.0 F) | 24.9 C (76.8 F) | 0.5 C (32.9 F) |
| Jul | 35.5 C (95.9 F) | 1.3 C (34.3 F) | 33.0 C (91.4 F) | 8.6 C (47.5 F) |
| Aug | 33.1 C (91.6 F) | -1.1 C (30.0 F) | 26.9 C (80.4 F) | 8.1 C (46.6 F) |
| Sep | 29.9 C (85.8 F) | -10.1 C (13.8 F) | 28.5 C (83.3 F) | -4.6 C (23.7 F) |
| Oct | 22.0 C (71.6 F) | -20.1 C (-4.2 F) | 18.4 C (65.1 F) | -2.8 C (27.0 F) |
| Nov | 15.9 C (60.6 F) | -29.3 C (-20.7 F) | n/a | n/a |
| Dec | 13.8 C (56.8 F) | -31.7 C (-25.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1957 | 1 |
| 1958 | 12 |
| 1959 | 4 |
| 1960 | 14 |
| 1961 | 12 |
| 1962 | 13 |
| 1963 | 16 |
| 1969 | 59 |
| 1970 | 32 |
| 1971 | 40 |
| 1972 | 21 |
| 1973 | 11 |
| 1974 | 20 |
| 1975 | 15 |
| 1976 | 33 |
| 1977 | 29 |
| 1978 | 26 |
| 1979 | 30 |
| 1980 | 15 |
| 1981 | 16 |
| 1982 | 24 |
| 1983 | 9 |
| 1984 | 21 |
| 1985 | 21 |
| 1986 | 21 |
| 1987 | 28 |
| 1988 | 19 |
| 1989 | 24 |
| 1990 | 24 |
| 1991 | 19 |
| 1992 | 18 |
| 1993 | 24 |
| 1994 | 18 |
| 1995 | 25 |
| 1996 | 33 |
| 1997 | 32 |
| 1998 | 42 |
| 1999 | 29 |
| 2000 | 19 |
| 2001 | 19 |
| 2002 | 43 |
| 2003 | 27 |
| 2004 | 24 |
| 2005 | 16 |
| 2006 | 18 |
| 2007 | 9 |
| 2008 | 12 |
| 2009 | 25 |
| 2010 | 51 |
| 2011 | 16 |
| 2012 | 11 |
| 2013 | 11 |
| 2014 | 17 |
| 2015 | 20 |
| 2016 | 23 |
| 2017 | 23 |
| 2018 | 24 |
| 2019 | 27 |
| 2020 | 24 |
| 2021 | 24 |
| 2022 | 20 |
| 2023 | 12 |
| 2024 | 3 |
| 2025 | 57 |
| 2026 | 39 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1998-07-02 | Record high maximum temperature | Record high maximum temperature 35.5 C (95.9 F) |
| 1999-07-23 | Record high minimum temperature | Record high minimum temperature 19.6 C (67.3 F) |
| 1999-07-24 | Record high minimum temperature | Record high minimum temperature 24.0 C (75.2 F) |
| 2021-07-04 | Record daily precipitation | Record daily precipitation 56.9 mm (2.2 in) |
Wettest Day of Each Month
Jul: 56.9 mm (2.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 5.1 mm (0.20 in) | 3 January 2011 |
| Feb | 23.1 mm (0.9 in) | 2 February 2003 |
| Mar | 27.2 mm (1.1 in) | 31 March 2004 |
| Apr | 12.0 mm (0.5 in) | 26 April 1971 |
| May | 26.0 mm (1.0 in) | 18 May 1988 |
| Jun | 40.9 mm (1.6 in) | 9 June 2015 |
| Jul | 56.9 mm (2.2 in) | 4 July 2021 |
| Aug | 53.0 mm (2.1 in) | 2 August 1972 |
| Sep | 28.2 mm (1.1 in) | 14 September 2001 |
| Oct | 16.0 mm (0.6 in) | 5 October 1973 |
| Nov | 8.0 mm (0.31 in) | 1 November 1981 |
| Dec | 6.1 mm (0.24 in) | 4 December 2016 |
Period of Record Coverage
1957 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1957 | 3 | 1% | No |
| 1958 | 99 | 27% | No |
| 1959 | 144 | 39% | No |
| 1960 | 213 | 58% | No |
| 1961 | 230 | 63% | No |
| 1962 | 238 | 65% | No |
| 1963 | 191 | 52% | No |
| 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 | 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 | 360 | 99% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 364 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 330 | 90% | Yes |
| 2000 | 323 | 88% | No |
| 2001 | 337 | 92% | Yes |
| 2002 | 333 | 91% | Yes |
| 2003 | 340 | 93% | Yes |
| 2004 | 336 | 92% | Yes |
| 2005 | 351 | 96% | Yes |
| 2006 | 349 | 96% | Yes |
| 2007 | 352 | 96% | Yes |
| 2008 | 352 | 96% | Yes |
| 2009 | 354 | 97% | Yes |
| 2010 | 352 | 96% | Yes |
| 2011 | 357 | 98% | Yes |
| 2012 | 357 | 98% | Yes |
| 2013 | 355 | 97% | Yes |
| 2014 | 354 | 97% | Yes |
| 2015 | 356 | 98% | Yes |
| 2016 | 355 | 97% | Yes |
| 2017 | 359 | 98% | Yes |
| 2018 | 356 | 98% | Yes |
| 2019 | 359 | 98% | Yes |
| 2020 | 360 | 98% | Yes |
| 2021 | 357 | 98% | Yes |
| 2022 | 200 | 55% | No |
| 2023 | 38 | 10% | No |
| 2024 | 63 | 17% | No |
| 2025 | 345 | 95% | Yes |
| 2026 | 266 | 73% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 7 October 2026 | Arvaiheer, MN | daily high min (Provisional) | 7.8 C (46.0 F) | 1.2 C (2.2 F) | 28 years | 17 of 100 (Routine) |
| 6 October 2026 | Arvaiheer, MN | daily high min (Provisional) | 10.6 C (51.1 F) | 4.7 C (8.5 F) | 44 years | 29 of 100 (Routine) |
| 28 September 2026 | Arvaiheer, MN | daily low max (Provisional) | 3.6 C (38.5 F) | 0.1 C (0.2 F) | 8 years | 9 of 100 (Routine) |
| 21 September 2026 | Arvaiheer, MN | daily high min (Provisional) | 11.1 C (52.0 F) | 2.0 C (3.6 F) | 7 years | 14 of 100 (Routine) |
| 20 September 2026 | Arvaiheer, MN | daily high min (Provisional) | 14.4 C (57.9 F) | 4.9 C (8.8 F) | 31 years | 28 of 100 (Routine) |
| 16 September 2026 | Arvaiheer, MN | daily high min (Provisional) | 12.4 C (54.3 F) | 2.7 C (4.9 F) | 44 years | 26 of 100 (Routine) |
| 15 September 2026 | Arvaiheer, MN | daily high min (Provisional) | 17.4 C (63.3 F) | 7.1 C (12.8 F) | 24 years | 31 of 100 (Routine) |
| 7 September 2026 | Arvaiheer, MN | daily rain (Provisional) | 20.0 mm (0.8 in) | 12.9 mm (0.5 in) | 16 years | 20 of 100 (Routine) |
| 2 September 2026 | Arvaiheer, MN | daily high min (Provisional) | 14.0 C (57.2 F) | 1.2 C (2.2 F) | 32 years | 19 of 100 (Routine) |
| 2 September 2026 | Arvaiheer, MN | daily high max (Provisional) | 28.0 C (82.4 F) | 0.6 C (1.1 F) | 12 years | 11 of 100 (Routine) |
| 1 September 2026 | Arvaiheer, MN | monthly high min (Provisional) | 19.6 C (67.3 F) | 4.9 C (8.8 F) | 26 years | 37 of 100 (Notable) |
| 30 August 2026 | Arvaiheer, MN | daily high min (Provisional) | 12.5 C (54.5 F) | 0.1 C (0.2 F) | 3 years | 7 of 100 (Routine) |
| 11 August 2026 | Arvaiheer, MN | daily high min | 13.3 C (55.9 F) | 0.6 C (1.1 F) | 17 years | 13 of 100 (Routine) |
| 6 August 2026 | Arvaiheer, MN | daily high min | 17.5 C (63.5 F) | 0.5 C (0.9 F) | 0 years | 8 of 100 (Routine) |
| 26 July 2026 | Arvaiheer, MN | daily high min | 17.8 C (64.0 F) | 1.5 C (2.7 F) | 19 years | 17 of 100 (Routine) |
| 25 July 2026 | Arvaiheer, MN | daily high min | 19.1 C (66.4 F) | 2.2 C (4.0 F) | 44 years | 27 of 100 (Routine) |
| 25 July 2026 | Arvaiheer, MN | daily high max | 33.0 C (91.4 F) | 0.7 C (1.3 F) | 27 years | 16 of 100 (Routine) |
| 12 July 2026 | Arvaiheer, MN | daily rain | 21.0 mm (0.8 in) | 2.0 mm (0.08 in) | 44 years | 20 of 100 (Routine) |
| 11 July 2026 | Arvaiheer, MN | daily low max | 11.6 C (52.9 F) | 2.5 C (4.5 F) | 8 years | 15 of 100 (Routine) |
| 1 July 2026 | Arvaiheer, MN | daily high min | 19.2 C (66.6 F) | 1.4 C (2.5 F) | 0 years | 11 of 100 (Routine) |
Climate Trend
31 complete years, 1969 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1969 | -0.4 C | -2.03 C |
| 1970 | 0.3 C | -1.34 C |
| 1971 | 0.9 C | -0.66 C |
| 1972 | 1.8 C | +0.19 C |
| 1973 | 1.7 C | +0.12 C |
| 1974 | 0.5 C | -1.08 C |
| 1975 | 1.6 C | -0.04 C |
| 1976 | 0.4 C | -1.20 C |
| 1977 | 1.4 C | -0.20 C |
| 1978 | 2.4 C | +0.80 C |
| 1979 | 2.0 C | +0.41 C |
| 1980 | 1.3 C | -0.31 C |
| 1981 | 1.4 C | -0.19 C |
| 1982 | 2.2 C | +0.59 C |
| 1983 | 1.8 C | +0.23 C |
| 1984 | 0.2 C | -1.38 C |
| 1985 | 0.6 C | -1.02 C |
| 1986 | 1.7 C | +0.12 C |
| 1987 | 1.4 C | -0.21 C |
| 1988 | 1.1 C | -0.52 C |
| 1989 | 2.3 C | +0.73 C |
| 1990 | 1.9 C | +0.28 C |
| 1991 | 1.6 C | -0.04 C |
| 1992 | 2.1 C | +0.51 C |
| 1993 | 1.6 C | -0.01 C |
| 1994 | 2.6 C | +0.97 C |
| 1995 | 2.5 C | +0.90 C |
| 1996 | 1.4 C | -0.24 C |
| 1997 | 3.0 C | +1.43 C |
| 1998 | 2.8 C | +1.22 C |
| 2025 | 3.5 C | +1.88 C |
The annual mean temperature here has risen by 0.5 C (0.3 to 0.7) per decade over 1969 to 2025. In Fahrenheit: 0.9 F (0.6 to 1.3) per decade. The slope is a straight line fitted to 31 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 (0.3 to 0.7) per decade | 0.9 F (0.6 to 1.3) per decade | 1969 to 2025 | 31 | Rise |
| Mean daily maximum | 0.22 C (-0.02 to 0.47) per decade | 0.40 F (-0.04 to 0.84) per decade | 1969 to 2025 | 31 | Not clearly different from zero |
| Mean daily minimum | 0.8 C (0.6 to 1.0) per decade | 1.5 F (1.1 to 1.9) per decade | 1969 to 2025 | 31 | 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
1957 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 35.5 C (95.9 F) | 1998 | 30.6 C (87.1 F) | 65 |
| Coldest night (TNn) | -36.1 C (-33.0 F) | 1969 | -28.8 C (-19.8 F) | 65 |
| Wettest day (Rx1day) | 56.9 mm (2.2 in) | 2021 | 25.0 mm (1.0 in) | 57 |
| Wettest five days (Rx5day) | 80.0 mm (3.1 in) | 1994 | 37.0 mm (1.5 in) | 37 |
| Longest dry spell (CDD) | 129 days | 1983 | 61 days | 56 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1957 | 3.9 C (39.0 F) |
| 1958 | 32.8 C (91.0 F) |
| 1959 | 26.1 C (79.0 F) |
| 1960 | 30.0 C (86.0 F) |
| 1961 | 32.2 C (90.0 F) |
| 1962 | 31.1 C (88.0 F) |
| 1963 | 27.8 C (82.0 F) |
| 1969 | 30.4 C (86.7 F) |
| 1970 | 29.5 C (85.1 F) |
| 1971 | 28.3 C (82.9 F) |
| 1972 | 31.0 C (87.8 F) |
| 1973 | 28.1 C (82.6 F) |
| 1974 | 28.4 C (83.1 F) |
| 1975 | 31.2 C (88.2 F) |
| 1976 | 29.9 C (85.8 F) |
| 1977 | 29.1 C (84.4 F) |
| 1978 | 29.1 C (84.4 F) |
| 1979 | 31.5 C (88.7 F) |
| 1980 | 31.1 C (88.0 F) |
| 1981 | 30.6 C (87.1 F) |
| 1982 | 29.3 C (84.7 F) |
| 1983 | 33.1 C (91.6 F) |
| 1984 | 29.6 C (85.3 F) |
| 1985 | 27.5 C (81.5 F) |
| 1986 | 28.3 C (82.9 F) |
| 1987 | 29.5 C (85.1 F) |
| 1988 | 32.3 C (90.1 F) |
| 1989 | 30.4 C (86.7 F) |
| 1990 | 27.7 C (81.9 F) |
| 1991 | 30.9 C (87.6 F) |
| 1992 | 29.5 C (85.1 F) |
| 1993 | 27.9 C (82.2 F) |
| 1994 | 30.1 C (86.2 F) |
| 1995 | 31.6 C (88.9 F) |
| 1996 | 30.4 C (86.7 F) |
| 1997 | 30.8 C (87.4 F) |
| 1998 | 35.5 C (95.9 F) |
| 1999 | 33.3 C (91.9 F) |
| 2000 | 34.0 C (93.2 F) |
| 2001 | 31.0 C (87.8 F) |
| 2002 | 33.6 C (92.5 F) |
| 2003 | 29.9 C (85.8 F) |
| 2004 | 33.1 C (91.6 F) |
| 2005 | 33.0 C (91.4 F) |
| 2006 | 31.0 C (87.8 F) |
| 2007 | 31.0 C (87.8 F) |
| 2008 | 32.4 C (90.3 F) |
| 2009 | 30.7 C (87.3 F) |
| 2010 | 32.9 C (91.2 F) |
| 2011 | 30.1 C (86.2 F) |
| 2012 | 30.5 C (86.9 F) |
| 2013 | 27.9 C (82.2 F) |
| 2014 | 29.8 C (85.6 F) |
| 2015 | 31.1 C (88.0 F) |
| 2016 | 31.8 C (89.2 F) |
| 2017 | 34.0 C (93.2 F) |
| 2018 | 31.2 C (88.2 F) |
| 2019 | 29.4 C (84.9 F) |
| 2020 | 31.1 C (88.0 F) |
| 2021 | 29.2 C (84.6 F) |
| 2022 | 32.7 C (90.9 F) |
| 2023 | 31.2 C (88.2 F) |
| 2024 | 28.2 C (82.8 F) |
| 2025 | 30.1 C (86.2 F) |
| 2026 | 33.0 C (91.4 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1957 | -17.2 C (1.0 F) |
| 1958 | -28.9 C (-20.0 F) |
| 1959 | -30.0 C (-22.0 F) |
| 1960 | -27.8 C (-18.0 F) |
| 1961 | -30.0 C (-22.0 F) |
| 1962 | -27.8 C (-18.0 F) |
| 1963 | -28.9 C (-20.0 F) |
| 1969 | -36.1 C (-33.0 F) |
| 1970 | -29.4 C (-20.9 F) |
| 1971 | -28.1 C (-18.6 F) |
| 1972 | -29.4 C (-20.9 F) |
| 1973 | -27.2 C (-17.0 F) |
| 1974 | -30.8 C (-23.4 F) |
| 1975 | -26.8 C (-16.2 F) |
| 1976 | -31.7 C (-25.1 F) |
| 1977 | -32.6 C (-26.7 F) |
| 1978 | -29.2 C (-20.6 F) |
| 1979 | -28.8 C (-19.8 F) |
| 1980 | -32.7 C (-26.9 F) |
| 1981 | -28.3 C (-18.9 F) |
| 1982 | -25.3 C (-13.5 F) |
| 1983 | -26.9 C (-16.4 F) |
| 1984 | -31.1 C (-24.0 F) |
| 1985 | -29.4 C (-20.9 F) |
| 1986 | -27.1 C (-16.8 F) |
| 1987 | -26.0 C (-14.8 F) |
| 1988 | -31.1 C (-24.0 F) |
| 1989 | -25.3 C (-13.5 F) |
| 1990 | -27.2 C (-17.0 F) |
| 1991 | -27.8 C (-18.0 F) |
| 1992 | -24.4 C (-11.9 F) |
| 1993 | -29.6 C (-21.3 F) |
| 1994 | -27.3 C (-17.1 F) |
| 1995 | -24.3 C (-11.7 F) |
| 1996 | -26.5 C (-15.7 F) |
| 1997 | -25.1 C (-13.2 F) |
| 1998 | -30.0 C (-22.0 F) |
| 1999 | -26.1 C (-15.0 F) |
| 2000 | -31.5 C (-24.7 F) |
| 2001 | -31.2 C (-24.2 F) |
| 2002 | -25.1 C (-13.2 F) |
| 2003 | -27.9 C (-18.2 F) |
| 2004 | -26.8 C (-16.2 F) |
| 2005 | -31.6 C (-24.9 F) |
| 2006 | -31.5 C (-24.7 F) |
| 2007 | -22.5 C (-8.5 F) |
| 2008 | -27.7 C (-17.9 F) |
| 2009 | -30.6 C (-23.1 F) |
| 2010 | -31.2 C (-24.2 F) |
| 2011 | -29.7 C (-21.5 F) |
| 2012 | -29.2 C (-20.6 F) |
| 2013 | -27.4 C (-17.3 F) |
| 2014 | -26.8 C (-16.2 F) |
| 2015 | -25.0 C (-13.0 F) |
| 2016 | -27.9 C (-18.2 F) |
| 2017 | -28.0 C (-18.4 F) |
| 2018 | -30.4 C (-22.7 F) |
| 2019 | -30.3 C (-22.5 F) |
| 2020 | -30.3 C (-22.5 F) |
| 2021 | -29.5 C (-21.1 F) |
| 2022 | -29.3 C (-20.7 F) |
| 2023 | -30.5 C (-22.9 F) |
| 2024 | -28.5 C (-19.3 F) |
| 2025 | -22.8 C (-9.0 F) |
| 2026 | -30.2 C (-22.4 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1957 | n/a |
| 1958 | n/a |
| 1959 | n/a |
| 1960 | n/a |
| 1961 | n/a |
| 1962 | n/a |
| 1963 | n/a |
| 1969 | 36.0 mm (1.4 in) |
| 1970 | 17.0 mm (0.7 in) |
| 1971 | 29.0 mm (1.1 in) |
| 1972 | 53.0 mm (2.1 in) |
| 1973 | 24.0 mm (0.9 in) |
| 1974 | 30.0 mm (1.2 in) |
| 1975 | 24.0 mm (0.9 in) |
| 1976 | 25.0 mm (1.0 in) |
| 1977 | 38.0 mm (1.5 in) |
| 1978 | 13.0 mm (0.5 in) |
| 1979 | 17.0 mm (0.7 in) |
| 1980 | 49.0 mm (1.9 in) |
| 1981 | 23.0 mm (0.9 in) |
| 1982 | 17.0 mm (0.7 in) |
| 1983 | 15.0 mm (0.6 in) |
| 1984 | 18.0 mm (0.7 in) |
| 1985 | 32.0 mm (1.3 in) |
| 1986 | 25.0 mm (1.0 in) |
| 1987 | 25.0 mm (1.0 in) |
| 1988 | 26.0 mm (1.0 in) |
| 1989 | 21.0 mm (0.8 in) |
| 1990 | 28.0 mm (1.1 in) |
| 1991 | 35.0 mm (1.4 in) |
| 1992 | 25.0 mm (1.0 in) |
| 1993 | 44.0 mm (1.7 in) |
| 1994 | 52.0 mm (2.0 in) |
| 1995 | 28.0 mm (1.1 in) |
| 1996 | 53.0 mm (2.1 in) |
| 1997 | 56.0 mm (2.2 in) |
| 1998 | 45.0 mm (1.8 in) |
| 1999 | 8.1 mm (0.32 in) |
| 2000 | 16.0 mm (0.6 in) |
| 2001 | 28.2 mm (1.1 in) |
| 2002 | 14.2 mm (0.6 in) |
| 2003 | 23.6 mm (0.9 in) |
| 2004 | 27.2 mm (1.1 in) |
| 2005 | 17.0 mm (0.7 in) |
| 2006 | 13.0 mm (0.5 in) |
| 2007 | 22.1 mm (0.9 in) |
| 2008 | 27.9 mm (1.1 in) |
| 2009 | 16.8 mm (0.7 in) |
| 2010 | 20.1 mm (0.8 in) |
| 2011 | 45.2 mm (1.8 in) |
| 2012 | 52.8 mm (2.1 in) |
| 2013 | 23.9 mm (0.9 in) |
| 2014 | 23.1 mm (0.9 in) |
| 2015 | 40.9 mm (1.6 in) |
| 2016 | 54.1 mm (2.1 in) |
| 2017 | 10.9 mm (0.4 in) |
| 2018 | 25.9 mm (1.0 in) |
| 2019 | 21.1 mm (0.8 in) |
| 2020 | 13.0 mm (0.5 in) |
| 2021 | 56.9 mm (2.2 in) |
| 2022 | 14.2 mm (0.6 in) |
| 2023 | n/a |
| 2024 | 9.9 mm (0.39 in) |
| 2025 | 15.0 mm (0.6 in) |
| 2026 | 21.0 mm (0.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1957 | n/a |
| 1958 | n/a |
| 1959 | n/a |
| 1960 | n/a |
| 1961 | n/a |
| 1962 | n/a |
| 1963 | n/a |
| 1969 | 51.0 mm (2.0 in) |
| 1970 | 26.0 mm (1.0 in) |
| 1971 | 33.0 mm (1.3 in) |
| 1972 | 53.0 mm (2.1 in) |
| 1973 | 47.0 mm (1.9 in) |
| 1974 | 51.0 mm (2.0 in) |
| 1975 | 39.0 mm (1.5 in) |
| 1976 | 35.0 mm (1.4 in) |
| 1977 | 71.0 mm (2.8 in) |
| 1978 | 15.0 mm (0.6 in) |
| 1979 | 20.0 mm (0.8 in) |
| 1980 | 50.0 mm (2.0 in) |
| 1981 | 33.0 mm (1.3 in) |
| 1982 | 34.0 mm (1.3 in) |
| 1983 | 36.0 mm (1.4 in) |
| 1984 | 39.0 mm (1.5 in) |
| 1985 | 50.0 mm (2.0 in) |
| 1986 | 27.0 mm (1.1 in) |
| 1987 | 31.0 mm (1.2 in) |
| 1988 | 37.0 mm (1.5 in) |
| 1989 | 35.0 mm (1.4 in) |
| 1990 | 42.0 mm (1.7 in) |
| 1991 | 78.0 mm (3.1 in) |
| 1992 | 53.0 mm (2.1 in) |
| 1993 | 69.0 mm (2.7 in) |
| 1994 | 80.0 mm (3.1 in) |
| 1995 | 53.0 mm (2.1 in) |
| 1996 | 61.0 mm (2.4 in) |
| 1997 | 78.0 mm (3.1 in) |
| 1998 | 76.0 mm (3.0 in) |
| 1999 | 0.8 mm (0.03 in) |
| 2000 | 0.0 mm (0.00 in) |
| 2001 | n/a |
| 2002 | 0.8 mm (0.03 in) |
| 2003 | 23.1 mm (0.9 in) |
| 2004 | 27.2 mm (1.1 in) |
| 2005 | 0.8 mm (0.03 in) |
| 2006 | n/a |
| 2007 | n/a |
| 2008 | n/a |
| 2009 | n/a |
| 2010 | n/a |
| 2011 | n/a |
| 2012 | n/a |
| 2013 | n/a |
| 2014 | n/a |
| 2015 | n/a |
| 2016 | n/a |
| 2017 | n/a |
| 2018 | n/a |
| 2019 | n/a |
| 2020 | n/a |
| 2021 | n/a |
| 2022 | n/a |
| 2023 | n/a |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | 23.7 mm (0.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1957 | n/a |
| 1958 | n/a |
| 1959 | n/a |
| 1960 | n/a |
| 1961 | n/a |
| 1962 | n/a |
| 1963 | n/a |
| 1969 | 113 days |
| 1970 | 93 days |
| 1971 | 100 days |
| 1972 | 114 days |
| 1973 | 62 days |
| 1974 | 97 days |
| 1975 | 105 days |
| 1976 | 87 days |
| 1977 | 112 days |
| 1978 | 103 days |
| 1979 | 67 days |
| 1980 | 82 days |
| 1981 | 60 days |
| 1982 | 109 days |
| 1983 | 129 days |
| 1984 | 88 days |
| 1985 | 95 days |
| 1986 | 75 days |
| 1987 | 55 days |
| 1988 | 64 days |
| 1989 | 102 days |
| 1990 | 102 days |
| 1991 | 84 days |
| 1992 | 116 days |
| 1993 | 83 days |
| 1994 | 98 days |
| 1995 | 90 days |
| 1996 | 126 days |
| 1997 | 102 days |
| 1998 | 100 days |
| 1999 | 16 days |
| 2000 | 8 days |
| 2001 | 1 day |
| 2002 | 19 days |
| 2003 | 23 days |
| 2004 | 23 days |
| 2005 | 25 days |
| 2006 | 1 day |
| 2007 | 2 days |
| 2008 | 1 day |
| 2009 | 1 day |
| 2010 | 2 days |
| 2011 | 1 day |
| 2012 | 1 day |
| 2013 | 1 day |
| 2014 | 2 days |
| 2015 | 2 days |
| 2016 | 2 days |
| 2017 | 1 day |
| 2018 | 1 day |
| 2019 | 1 day |
| 2020 | 1 day |
| 2021 | 1 day |
| 2022 | 1 day |
| 2023 | n/a |
| 2024 | n/a |
| 2025 | 1 day |
| 2026 | 2 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
31 years with a frostAcross 31 years with a frost, the median last spring frost at Arvaiheer falls on 27 May and the median first autumn frost on 16 September, which leaves a median of 110 days between them.
Fitted over all years, the growing season changes by +5.3 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1970 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 27 May | n/a | 28 May | n/a | -3.2 days per decade |
| First autumn frost | 16 September | n/a | 16 September | n/a | +2.1 days per decade |
| Growing days | 110 days | n/a | 110 days | n/a | +5.3 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
30 years, 1969 to 1998A day with at least 28.4 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 74.1 mm (2.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 28.4 mm (1.1 in) | |
| 5 years | 40.0 mm (1.6 in) | |
| 10 years | 47.9 mm (1.9 in) | |
| 25 years | 58.2 mm (2.3 in) | |
| 50 years | 66.1 mm (2.6 in) | Longer than the 30 years of record |
| 100 years | 74.1 mm (2.9 in) | Longer than the 30 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, 30 years of values from 1969 to 1998.
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: 56.0 mm (2.2 in) in 1997; 53.0 mm (2.1 in) in 1972; 53.0 mm (2.1 in) in 1996.
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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).