Houlton AP Weather Records (USW00014609)
Record envelope, standing records and threshold days for Houlton AP (USW00014609), Maine, United States, with 79 years of record.
Key Facts for Houlton AP
- Houlton AP (USW00014609) is a weather station in Maine, United States at 46.12 latitude and -67.79 longitude, 146 m (480 ft) above sea level.
- The station reports from 1948 to 2026, 79 years of record.
- 1,464 records set at Houlton AP still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Houlton AP tied a daily record high minimum temperature of 18.9 C (66.0 F) on 8 August 2026.
About the Station
- Location: Maine, United States, 46.12 latitude, -67.79 longitude.
- Elevation: 146 m (480 ft).
- Period of record: 1948 to 2026, 79 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
6 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 14.4 C (57.9 F) | -40.6 C (-41.1 F) | 6.1 C (43.0 F) | -27.8 C (-18.0 F) |
| Feb | 16.7 C (62.1 F) | -37.8 C (-36.0 F) | 6.1 C (43.0 F) | -27.8 C (-18.0 F) |
| Mar | 26.1 C (79.0 F) | -35.0 C (-31.0 F) | 18.3 C (64.9 F) | -25.6 C (-14.1 F) |
| Apr | 30.0 C (86.0 F) | -24.9 C (-12.8 F) | 20.0 C (68.0 F) | -9.4 C (15.1 F) |
| May | 35.6 C (96.1 F) | -7.8 C (18.0 F) | 30.0 C (86.0 F) | -2.8 C (27.0 F) |
| Jun | 36.1 C (97.0 F) | -3.2 C (26.2 F) | 31.1 C (88.0 F) | -1.1 C (30.0 F) |
| Jul | 36.1 C (97.0 F) | 0.0 C (32.0 F) | 33.3 C (91.9 F) | 6.7 C (44.1 F) |
| Aug | 37.2 C (99.0 F) | -1.1 C (30.0 F) | 32.2 C (90.0 F) | 5.0 C (41.0 F) |
| Sep | 33.9 C (93.0 F) | -6.7 C (19.9 F) | 25.0 C (77.0 F) | -2.2 C (28.0 F) |
| Oct | 28.9 C (84.0 F) | -12.2 C (10.0 F) | 23.9 C (75.0 F) | -3.9 C (25.0 F) |
| Nov | 22.8 C (73.0 F) | -25.6 C (-14.1 F) | n/a | n/a |
| Dec | 15.6 C (60.1 F) | -36.7 C (-34.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1948 | 7 |
| 1949 | 15 |
| 1950 | 23 |
| 1951 | 27 |
| 1952 | 12 |
| 1953 | 24 |
| 1954 | 12 |
| 1955 | 14 |
| 1956 | 25 |
| 1957 | 18 |
| 1958 | 15 |
| 1959 | 15 |
| 1960 | 11 |
| 1961 | 15 |
| 1962 | 18 |
| 1963 | 27 |
| 1964 | 16 |
| 1965 | 21 |
| 1966 | 18 |
| 1967 | 19 |
| 1968 | 11 |
| 1969 | 29 |
| 1970 | 31 |
| 1971 | 23 |
| 1972 | 44 |
| 1973 | 26 |
| 1974 | 21 |
| 1975 | 28 |
| 1976 | 32 |
| 1977 | 28 |
| 1978 | 22 |
| 1979 | 41 |
| 1980 | 18 |
| 1981 | 24 |
| 1982 | 30 |
| 1983 | 14 |
| 1984 | 21 |
| 1985 | 7 |
| 1988 | 24 |
| 1989 | 32 |
| 1990 | 19 |
| 1991 | 19 |
| 1992 | 20 |
| 1993 | 25 |
| 1994 | 19 |
| 1995 | 23 |
| 1996 | 27 |
| 1997 | 8 |
| 1998 | 15 |
| 1999 | 22 |
| 2000 | 10 |
| 2001 | 15 |
| 2002 | 18 |
| 2003 | 24 |
| 2004 | 11 |
| 2005 | 10 |
| 2006 | 22 |
| 2007 | 13 |
| 2008 | 15 |
| 2009 | 14 |
| 2010 | 20 |
| 2011 | 7 |
| 2012 | 17 |
| 2013 | 11 |
| 2014 | 17 |
| 2015 | 13 |
| 2016 | 13 |
| 2017 | 16 |
| 2018 | 24 |
| 2019 | 6 |
| 2020 | 24 |
| 2021 | 20 |
| 2022 | 18 |
| 2023 | 14 |
| 2024 | 15 |
| 2025 | 16 |
| 2026 | 6 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 1981-01-04 | Record low maximum temperature | Record low maximum temperature -26.7 C (-16.1 F) |
| 1981-01-04 | Record low minimum temperature | Record low minimum temperature -40.6 C (-41.1 F) |
| 1998-01-24 | Record snow depth | Record snow depth 170.2 cm (67.0 in) |
| 1998-01-25 | Record snow depth | Record snow depth 175.3 cm (69.0 in) |
| 1998-01-30 | Record snow depth | Record snow depth 180.3 cm (71.0 in) |
Wettest Day of Each Month
Sep: 132.1 mm (5.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 59.2 mm (2.3 in) | 30 January 1990 |
| Feb | 41.7 mm (1.6 in) | 3 February 1968 |
| Mar | 55.6 mm (2.2 in) | 17 March 2007 |
| Apr | 54.1 mm (2.1 in) | 28 April 1973 |
| May | 88.9 mm (3.5 in) | 27 May 1961 |
| Jun | 74.4 mm (2.9 in) | 23 June 2012 |
| Jul | 68.3 mm (2.7 in) | 5 July 2014 |
| Aug | 85.9 mm (3.4 in) | 11 August 1990 |
| Sep | 132.1 mm (5.2 in) | 11 September 1954 |
| Oct | 64.3 mm (2.5 in) | 25 October 1959 |
| Nov | 69.9 mm (2.8 in) | 26 November 1974 |
| Dec | 73.4 mm (2.9 in) | 11 December 1993 |
Period of Record Coverage
1948 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1948 | 214 | 58% | No |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 360 | 98% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 364 | 99% | Yes |
| 1961 | 365 | 100% | Yes |
| 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 | 363 | 99% | 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 | 365 | 100% | Yes |
| 1985 | 120 | 33% | No |
| 1987 | 31 | 8% | No |
| 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 | 364 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 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 | 364 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 364 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 364 | 100% | Yes |
| 2026 | 281 | 77% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 8 August 2026 | Houlton AP, US | daily high min (Tie) | 18.9 C (66.0 F) | tie | 60 years | 6 of 100 (Routine) |
| 1 June 2026 | Houlton AP, US | daily low min (Tie) | -1.1 C (30.0 F) | tie | 59 years | 6 of 100 (Routine) |
| 20 May 2026 | Houlton AP, US | daily high max (Tie) | 30.0 C (86.0 F) | tie | 75 years | 7 of 100 (Routine) |
| 6 May 2026 | Houlton AP, US | daily rain | 30.5 mm (1.2 in) | 10.4 mm (0.4 in) | 8 years | 22 of 100 (Routine) |
| 5 May 2026 | Houlton AP, US | daily high max (Tie) | 26.7 C (80.1 F) | tie | 65 years | 6 of 100 (Routine) |
| 19 April 2026 | Houlton AP, US | daily rain | 17.5 mm (0.7 in) | 4.8 mm (0.19 in) | 56 years | 20 of 100 (Routine) |
| 16 April 2026 | Houlton AP, US | daily high min | 6.1 C (43.0 F) | 0.5 C (0.9 F) | 8 years | 10 of 100 (Routine) |
| 15 April 2026 | Houlton AP, US | daily high min (Tie) | 5.6 C (42.1 F) | tie | 12 years | 2 of 100 (Routine) |
| 17 March 2026 | Houlton AP, US | daily high max | 13.9 C (57.0 F) | 1.1 C (2.0 F) | 16 years | 13 of 100 (Routine) |
| 10 March 2026 | Houlton AP, US | daily high max | 18.3 C (64.9 F) | 3.9 C (7.0 F) | 48 years | 28 of 100 (Routine) |
| 9 March 2026 | Houlton AP, US | daily high min | 1.1 C (34.0 F) | 0.5 C (0.9 F) | 25 years | 14 of 100 (Routine) |
| 9 March 2026 | Houlton AP, US | daily high max | 13.3 C (55.9 F) | 1.6 C (2.9 F) | 13 years | 13 of 100 (Routine) |
| 15 January 2026 | Houlton AP, US | daily high min | 1.7 C (35.1 F) | 1.1 C (2.0 F) | 31 years | 17 of 100 (Routine) |
| 19 December 2025 | Houlton AP, US | daily high min | 1.7 C (35.1 F) | 1.1 C (2.0 F) | 28 years | 16 of 100 (Routine) |
| 19 December 2025 | Houlton AP, US | daily rain | 20.3 mm (0.8 in) | 5.1 mm (0.20 in) | 12 years | 15 of 100 (Routine) |
| 19 December 2025 | Houlton AP, US | daily high max | 12.2 C (54.0 F) | 1.6 C (2.9 F) | 2 years | 9 of 100 (Routine) |
| 9 December 2025 | Houlton AP, US | daily low min | -27.2 C (-17.0 F) | 0.5 C (0.9 F) | 55 years | 23 of 100 (Routine) |
| 31 October 2025 | Houlton AP, US | daily rain | 38.1 mm (1.5 in) | 12.2 mm (0.5 in) | 12 years | 22 of 100 (Routine) |
| 7 October 2025 | Houlton AP, US | daily high max | 27.8 C (82.0 F) | 3.4 C (6.1 F) | 64 years | 32 of 100 (Routine) |
| 6 October 2025 | Houlton AP, US | monthly high max | 28.9 C (84.0 F) | 1.1 C (2.0 F) | 54 years | 35 of 100 (Notable) |
Climate Trend
74 complete years, 1949 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1949 | 5.0 C | +0.33 C |
| 1950 | 4.4 C | -0.32 C |
| 1951 | 4.8 C | +0.11 C |
| 1952 | 5.1 C | +0.42 C |
| 1953 | 5.9 C | +1.15 C |
| 1954 | 4.4 C | -0.29 C |
| 1955 | 4.1 C | -0.58 C |
| 1956 | 3.7 C | -1.02 C |
| 1957 | 4.7 C | +0.02 C |
| 1958 | 4.2 C | -0.55 C |
| 1959 | 4.6 C | -0.12 C |
| 1960 | 5.2 C | +0.48 C |
| 1961 | 4.6 C | -0.07 C |
| 1962 | 3.9 C | -0.83 C |
| 1963 | 4.0 C | -0.70 C |
| 1964 | 4.3 C | -0.43 C |
| 1965 | 3.6 C | -1.15 C |
| 1966 | 5.1 C | +0.42 C |
| 1967 | 4.0 C | -0.69 C |
| 1968 | 4.2 C | -0.53 C |
| 1969 | 4.9 C | +0.18 C |
| 1970 | 4.9 C | +0.18 C |
| 1971 | 4.2 C | -0.55 C |
| 1972 | 3.4 C | -1.35 C |
| 1973 | 5.9 C | +1.16 C |
| 1974 | 3.8 C | -0.96 C |
| 1975 | 4.3 C | -0.46 C |
| 1976 | 3.7 C | -0.97 C |
| 1977 | 3.8 C | -0.96 C |
| 1978 | 3.5 C | -1.26 C |
| 1979 | 5.7 C | +0.97 C |
| 1980 | 4.2 C | -0.48 C |
| 1981 | 5.2 C | +0.50 C |
| 1982 | 3.9 C | -0.81 C |
| 1983 | 5.0 C | +0.33 C |
| 1984 | 4.5 C | -0.19 C |
| 1988 | 4.7 C | -0.01 C |
| 1989 | 3.1 C | -1.60 C |
| 1990 | 4.8 C | +0.09 C |
| 1991 | 4.7 C | -0.05 C |
| 1992 | 3.8 C | -0.89 C |
| 1993 | 3.7 C | -1.04 C |
| 1994 | 4.0 C | -0.73 C |
| 1995 | 4.3 C | -0.46 C |
| 1996 | 4.7 C | -0.04 C |
| 1997 | 3.7 C | -0.99 C |
| 1998 | 5.6 C | +0.93 C |
| 1999 | 6.3 C | +1.54 C |
| 2000 | 4.7 C | -0.04 C |
| 2001 | 5.1 C | +0.34 C |
| 2002 | 4.6 C | -0.15 C |
| 2003 | 4.1 C | -0.59 C |
| 2004 | 4.0 C | -0.73 C |
| 2005 | 4.9 C | +0.20 C |
| 2006 | 6.3 C | +1.61 C |
| 2007 | 4.1 C | -0.59 C |
| 2008 | 4.4 C | -0.28 C |
| 2009 | 4.2 C | -0.50 C |
| 2010 | 6.7 C | +1.97 C |
| 2011 | 5.4 C | +0.70 C |
| 2012 | 5.9 C | +1.21 C |
| 2013 | 4.8 C | +0.13 C |
| 2014 | 4.7 C | +0.03 C |
| 2015 | 4.5 C | -0.19 C |
| 2016 | 5.7 C | +0.95 C |
| 2017 | 5.2 C | +0.53 C |
| 2018 | 4.7 C | -0.01 C |
| 2019 | 4.1 C | -0.65 C |
| 2020 | 5.9 C | +1.23 C |
| 2021 | 6.4 C | +1.73 C |
| 2022 | 6.0 C | +1.30 C |
| 2023 | 6.4 C | +1.69 C |
| 2024 | 6.7 C | +1.96 C |
| 2025 | 5.1 C | +0.43 C |
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1949 to 2025. In Fahrenheit: 0.3 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 74 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.1 C (0.1 to 0.2) per decade | 0.3 F (0.1 to 0.4) per decade | 1949 to 2025 | 74 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.1 to 0.4) per decade | 1949 to 2025 | 74 | Rise |
| Mean daily minimum | 0.13 C (0.03 to 0.23) per decade | 0.2 F (0.1 to 0.4) per decade | 1949 to 2025 | 74 | 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
1948 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 37.2 C (99.0 F) | 1975 | 33.3 C (91.9 F) | 78 |
| Coldest night (TNn) | -40.6 C (-41.1 F) | 1981 | -31.7 C (-25.1 F) | 78 |
| Wettest day (Rx1day) | 132.1 mm (5.2 in) | 1954 | 53.6 mm (2.1 in) | 78 |
| Wettest five days (Rx5day) | 243.6 mm (9.6 in) | 2012 | 82.0 mm (3.2 in) | 78 |
| Longest dry spell (CDD) | 29 days | 2001 | 15 days | 78 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1948 | 32.2 C (90.0 F) |
| 1949 | 33.3 C (91.9 F) |
| 1950 | 31.7 C (89.1 F) |
| 1951 | 30.6 C (87.1 F) |
| 1952 | 36.1 C (97.0 F) |
| 1953 | 34.4 C (93.9 F) |
| 1954 | 31.7 C (89.1 F) |
| 1955 | 36.1 C (97.0 F) |
| 1956 | 33.3 C (91.9 F) |
| 1957 | 33.3 C (91.9 F) |
| 1958 | 30.6 C (87.1 F) |
| 1959 | 33.9 C (93.0 F) |
| 1960 | 33.3 C (91.9 F) |
| 1961 | 32.2 C (90.0 F) |
| 1962 | 33.3 C (91.9 F) |
| 1963 | 33.3 C (91.9 F) |
| 1964 | 33.9 C (93.0 F) |
| 1965 | 31.7 C (89.1 F) |
| 1966 | 31.1 C (88.0 F) |
| 1967 | 32.2 C (90.0 F) |
| 1968 | 33.3 C (91.9 F) |
| 1969 | 36.1 C (97.0 F) |
| 1970 | 35.6 C (96.1 F) |
| 1971 | 33.3 C (91.9 F) |
| 1972 | 35.0 C (95.0 F) |
| 1973 | 34.4 C (93.9 F) |
| 1974 | 32.2 C (90.0 F) |
| 1975 | 37.2 C (99.0 F) |
| 1976 | 35.0 C (95.0 F) |
| 1977 | 33.3 C (91.9 F) |
| 1978 | 35.6 C (96.1 F) |
| 1979 | 32.8 C (91.0 F) |
| 1980 | 34.4 C (93.9 F) |
| 1981 | 32.2 C (90.0 F) |
| 1982 | 32.8 C (91.0 F) |
| 1983 | 33.9 C (93.0 F) |
| 1984 | 33.3 C (91.9 F) |
| 1985 | 21.7 C (71.1 F) |
| 1987 | 10.0 C (50.0 F) |
| 1988 | 35.6 C (96.1 F) |
| 1989 | 33.9 C (93.0 F) |
| 1990 | 31.7 C (89.1 F) |
| 1991 | 36.1 C (97.0 F) |
| 1992 | 34.4 C (93.9 F) |
| 1993 | 33.3 C (91.9 F) |
| 1994 | 33.9 C (93.0 F) |
| 1995 | 36.1 C (97.0 F) |
| 1996 | 32.2 C (90.0 F) |
| 1997 | 32.2 C (90.0 F) |
| 1998 | 32.2 C (90.0 F) |
| 1999 | 34.4 C (93.9 F) |
| 2000 | 31.1 C (88.0 F) |
| 2001 | 33.9 C (93.0 F) |
| 2002 | 33.3 C (91.9 F) |
| 2003 | 32.8 C (91.0 F) |
| 2004 | 30.6 C (87.1 F) |
| 2005 | 33.9 C (93.0 F) |
| 2006 | 32.2 C (90.0 F) |
| 2007 | 32.8 C (91.0 F) |
| 2008 | 31.7 C (89.1 F) |
| 2009 | 31.7 C (89.1 F) |
| 2010 | 33.9 C (93.0 F) |
| 2011 | 31.1 C (88.0 F) |
| 2012 | 32.2 C (90.0 F) |
| 2013 | 33.9 C (93.0 F) |
| 2014 | 33.9 C (93.0 F) |
| 2015 | 32.2 C (90.0 F) |
| 2016 | 31.1 C (88.0 F) |
| 2017 | 32.8 C (91.0 F) |
| 2018 | 34.4 C (93.9 F) |
| 2019 | 33.3 C (91.9 F) |
| 2020 | 35.0 C (95.0 F) |
| 2021 | 33.9 C (93.0 F) |
| 2022 | 32.8 C (91.0 F) |
| 2023 | 33.9 C (93.0 F) |
| 2024 | 35.0 C (95.0 F) |
| 2025 | 34.4 C (93.9 F) |
| 2026 | 33.3 C (91.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1948 | -22.8 C (-9.0 F) |
| 1949 | -32.2 C (-26.0 F) |
| 1950 | -32.8 C (-27.0 F) |
| 1951 | -34.4 C (-29.9 F) |
| 1952 | -32.8 C (-27.0 F) |
| 1953 | -23.9 C (-11.0 F) |
| 1954 | -30.6 C (-23.1 F) |
| 1955 | -35.6 C (-32.1 F) |
| 1956 | -30.0 C (-22.0 F) |
| 1957 | -36.7 C (-34.1 F) |
| 1958 | -28.9 C (-20.0 F) |
| 1959 | -27.8 C (-18.0 F) |
| 1960 | -28.3 C (-18.9 F) |
| 1961 | -31.7 C (-25.1 F) |
| 1962 | -35.6 C (-32.1 F) |
| 1963 | -30.0 C (-22.0 F) |
| 1964 | -27.2 C (-17.0 F) |
| 1965 | -31.1 C (-24.0 F) |
| 1966 | -32.2 C (-26.0 F) |
| 1967 | -37.8 C (-36.0 F) |
| 1968 | -33.9 C (-29.0 F) |
| 1969 | -33.3 C (-27.9 F) |
| 1970 | -32.2 C (-26.0 F) |
| 1971 | -38.3 C (-36.9 F) |
| 1972 | -35.6 C (-32.1 F) |
| 1973 | -33.3 C (-27.9 F) |
| 1974 | -32.8 C (-27.0 F) |
| 1975 | -35.6 C (-32.1 F) |
| 1976 | -37.8 C (-36.0 F) |
| 1977 | -33.9 C (-29.0 F) |
| 1978 | -31.1 C (-24.0 F) |
| 1979 | -33.9 C (-29.0 F) |
| 1980 | -34.4 C (-29.9 F) |
| 1981 | -40.6 C (-41.1 F) |
| 1982 | -35.6 C (-32.1 F) |
| 1983 | -26.7 C (-16.1 F) |
| 1984 | -35.0 C (-31.0 F) |
| 1985 | -27.2 C (-17.0 F) |
| 1987 | -25.6 C (-14.1 F) |
| 1988 | -31.1 C (-24.0 F) |
| 1989 | -36.7 C (-34.1 F) |
| 1990 | -31.1 C (-24.0 F) |
| 1991 | -30.6 C (-23.1 F) |
| 1992 | -30.0 C (-22.0 F) |
| 1993 | -37.8 C (-36.0 F) |
| 1994 | -35.0 C (-31.0 F) |
| 1995 | -39.4 C (-38.9 F) |
| 1996 | -32.2 C (-26.0 F) |
| 1997 | -32.8 C (-27.0 F) |
| 1998 | -31.1 C (-24.0 F) |
| 1999 | -31.7 C (-25.1 F) |
| 2000 | -30.0 C (-22.0 F) |
| 2001 | -35.0 C (-31.0 F) |
| 2002 | -30.0 C (-22.0 F) |
| 2003 | -32.2 C (-26.0 F) |
| 2004 | -32.2 C (-26.0 F) |
| 2005 | -30.6 C (-23.1 F) |
| 2006 | -24.4 C (-11.9 F) |
| 2007 | -30.0 C (-22.0 F) |
| 2008 | -33.9 C (-29.0 F) |
| 2009 | -37.8 C (-36.0 F) |
| 2010 | -26.1 C (-15.0 F) |
| 2011 | -31.1 C (-24.0 F) |
| 2012 | -30.6 C (-23.1 F) |
| 2013 | -29.9 C (-21.8 F) |
| 2014 | -31.0 C (-23.8 F) |
| 2015 | -33.2 C (-27.8 F) |
| 2016 | -31.0 C (-23.8 F) |
| 2017 | -29.3 C (-20.7 F) |
| 2018 | -28.8 C (-19.8 F) |
| 2019 | -29.9 C (-21.8 F) |
| 2020 | -34.9 C (-30.8 F) |
| 2021 | -28.2 C (-18.8 F) |
| 2022 | -36.0 C (-32.8 F) |
| 2023 | -31.0 C (-23.8 F) |
| 2024 | -27.1 C (-16.8 F) |
| 2025 | -28.8 C (-19.8 F) |
| 2026 | -27.8 C (-18.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1948 | 45.0 mm (1.8 in) |
| 1949 | 53.8 mm (2.1 in) |
| 1950 | 58.2 mm (2.3 in) |
| 1951 | 48.8 mm (1.9 in) |
| 1952 | 66.5 mm (2.6 in) |
| 1953 | 34.8 mm (1.4 in) |
| 1954 | 132.1 mm (5.2 in) |
| 1955 | 38.4 mm (1.5 in) |
| 1956 | 59.2 mm (2.3 in) |
| 1957 | 33.5 mm (1.3 in) |
| 1958 | 53.8 mm (2.1 in) |
| 1959 | 64.3 mm (2.5 in) |
| 1960 | 41.7 mm (1.6 in) |
| 1961 | 88.9 mm (3.5 in) |
| 1962 | 63.0 mm (2.5 in) |
| 1963 | 56.6 mm (2.2 in) |
| 1964 | 59.2 mm (2.3 in) |
| 1965 | 34.3 mm (1.4 in) |
| 1966 | 58.9 mm (2.3 in) |
| 1967 | 64.0 mm (2.5 in) |
| 1968 | 41.7 mm (1.6 in) |
| 1969 | 89.4 mm (3.5 in) |
| 1970 | 51.6 mm (2.0 in) |
| 1971 | 29.5 mm (1.2 in) |
| 1972 | 54.1 mm (2.1 in) |
| 1973 | 54.1 mm (2.1 in) |
| 1974 | 69.9 mm (2.8 in) |
| 1975 | 32.3 mm (1.3 in) |
| 1976 | 48.3 mm (1.9 in) |
| 1977 | 32.5 mm (1.3 in) |
| 1978 | 38.6 mm (1.5 in) |
| 1979 | 52.8 mm (2.1 in) |
| 1980 | 29.5 mm (1.2 in) |
| 1981 | 59.9 mm (2.4 in) |
| 1982 | 54.6 mm (2.1 in) |
| 1983 | 61.7 mm (2.4 in) |
| 1984 | 49.5 mm (1.9 in) |
| 1985 | 24.9 mm (1.0 in) |
| 1987 | 39.4 mm (1.6 in) |
| 1988 | 30.5 mm (1.2 in) |
| 1989 | 58.9 mm (2.3 in) |
| 1990 | 85.9 mm (3.4 in) |
| 1991 | 61.0 mm (2.4 in) |
| 1992 | 64.3 mm (2.5 in) |
| 1993 | 73.4 mm (2.9 in) |
| 1994 | 43.2 mm (1.7 in) |
| 1995 | 43.9 mm (1.7 in) |
| 1996 | 36.3 mm (1.4 in) |
| 1997 | 36.6 mm (1.4 in) |
| 1998 | 74.2 mm (2.9 in) |
| 1999 | 77.0 mm (3.0 in) |
| 2000 | 36.1 mm (1.4 in) |
| 2001 | 23.6 mm (0.9 in) |
| 2002 | 56.1 mm (2.2 in) |
| 2003 | 57.7 mm (2.3 in) |
| 2004 | 42.2 mm (1.7 in) |
| 2005 | 53.8 mm (2.1 in) |
| 2006 | 57.4 mm (2.3 in) |
| 2007 | 55.6 mm (2.2 in) |
| 2008 | 58.4 mm (2.3 in) |
| 2009 | 57.4 mm (2.3 in) |
| 2010 | 73.2 mm (2.9 in) |
| 2011 | 49.5 mm (1.9 in) |
| 2012 | 74.4 mm (2.9 in) |
| 2013 | 48.5 mm (1.9 in) |
| 2014 | 68.3 mm (2.7 in) |
| 2015 | 126.2 mm (5.0 in) |
| 2016 | 45.7 mm (1.8 in) |
| 2017 | 53.1 mm (2.1 in) |
| 2018 | 39.9 mm (1.6 in) |
| 2019 | 53.3 mm (2.1 in) |
| 2020 | 56.9 mm (2.2 in) |
| 2021 | 45.2 mm (1.8 in) |
| 2022 | 48.0 mm (1.9 in) |
| 2023 | 48.5 mm (1.9 in) |
| 2024 | 34.8 mm (1.4 in) |
| 2025 | 38.1 mm (1.5 in) |
| 2026 | 31.5 mm (1.2 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1948 | 78.3 mm (3.1 in) |
| 1949 | 69.0 mm (2.7 in) |
| 1950 | 124.5 mm (4.9 in) |
| 1951 | 87.2 mm (3.4 in) |
| 1952 | 82.3 mm (3.2 in) |
| 1953 | 82.8 mm (3.3 in) |
| 1954 | 142.8 mm (5.6 in) |
| 1955 | 60.1 mm (2.4 in) |
| 1956 | 66.6 mm (2.6 in) |
| 1957 | 72.9 mm (2.9 in) |
| 1958 | 82.0 mm (3.2 in) |
| 1959 | 93.8 mm (3.7 in) |
| 1960 | 71.6 mm (2.8 in) |
| 1961 | 128.5 mm (5.1 in) |
| 1962 | 99.3 mm (3.9 in) |
| 1963 | 102.5 mm (4.0 in) |
| 1964 | 90.5 mm (3.6 in) |
| 1965 | 68.5 mm (2.7 in) |
| 1966 | 67.0 mm (2.6 in) |
| 1967 | 105.7 mm (4.2 in) |
| 1968 | 50.1 mm (2.0 in) |
| 1969 | 112.8 mm (4.4 in) |
| 1970 | 106.0 mm (4.2 in) |
| 1971 | 46.0 mm (1.8 in) |
| 1972 | 85.8 mm (3.4 in) |
| 1973 | 92.5 mm (3.6 in) |
| 1974 | 91.2 mm (3.6 in) |
| 1975 | 64.0 mm (2.5 in) |
| 1976 | 90.7 mm (3.6 in) |
| 1977 | 76.8 mm (3.0 in) |
| 1978 | 61.8 mm (2.4 in) |
| 1979 | 71.6 mm (2.8 in) |
| 1980 | 50.5 mm (2.0 in) |
| 1981 | 93.5 mm (3.7 in) |
| 1982 | 70.6 mm (2.8 in) |
| 1983 | 98.8 mm (3.9 in) |
| 1984 | 112.4 mm (4.4 in) |
| 1985 | 28.5 mm (1.1 in) |
| 1987 | 40.7 mm (1.6 in) |
| 1988 | 46.4 mm (1.8 in) |
| 1989 | 91.2 mm (3.6 in) |
| 1990 | 100.4 mm (4.0 in) |
| 1991 | 85.6 mm (3.4 in) |
| 1992 | 98.4 mm (3.9 in) |
| 1993 | 82.6 mm (3.3 in) |
| 1994 | 72.1 mm (2.8 in) |
| 1995 | 56.6 mm (2.2 in) |
| 1996 | 82.0 mm (3.2 in) |
| 1997 | 58.4 mm (2.3 in) |
| 1998 | 92.7 mm (3.6 in) |
| 1999 | 105.2 mm (4.1 in) |
| 2000 | 72.4 mm (2.9 in) |
| 2001 | 55.6 mm (2.2 in) |
| 2002 | 81.7 mm (3.2 in) |
| 2003 | 78.5 mm (3.1 in) |
| 2004 | 52.1 mm (2.1 in) |
| 2005 | 89.7 mm (3.5 in) |
| 2006 | 82.6 mm (3.3 in) |
| 2007 | 77.0 mm (3.0 in) |
| 2008 | 89.9 mm (3.5 in) |
| 2009 | 65.3 mm (2.6 in) |
| 2010 | 81.5 mm (3.2 in) |
| 2011 | 82.3 mm (3.2 in) |
| 2012 | 243.6 mm (9.6 in) |
| 2013 | 100.5 mm (4.0 in) |
| 2014 | 95.5 mm (3.8 in) |
| 2015 | 180.0 mm (7.1 in) |
| 2016 | 88.9 mm (3.5 in) |
| 2017 | 94.8 mm (3.7 in) |
| 2018 | 68.9 mm (2.7 in) |
| 2019 | 80.2 mm (3.2 in) |
| 2020 | 104.0 mm (4.1 in) |
| 2021 | 80.3 mm (3.2 in) |
| 2022 | 81.0 mm (3.2 in) |
| 2023 | 66.5 mm (2.6 in) |
| 2024 | 77.9 mm (3.1 in) |
| 2025 | 52.8 mm (2.1 in) |
| 2026 | 48.8 mm (1.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1948 | 16 days |
| 1949 | 13 days |
| 1950 | 19 days |
| 1951 | 15 days |
| 1952 | 14 days |
| 1953 | 18 days |
| 1954 | 10 days |
| 1955 | 12 days |
| 1956 | 13 days |
| 1957 | 11 days |
| 1958 | 11 days |
| 1959 | 13 days |
| 1960 | 13 days |
| 1961 | 18 days |
| 1962 | 26 days |
| 1963 | 16 days |
| 1964 | 13 days |
| 1965 | 20 days |
| 1966 | 12 days |
| 1967 | 12 days |
| 1968 | 19 days |
| 1969 | 12 days |
| 1970 | 25 days |
| 1971 | 12 days |
| 1972 | 14 days |
| 1973 | 17 days |
| 1974 | 19 days |
| 1975 | 14 days |
| 1976 | 19 days |
| 1977 | 13 days |
| 1978 | 17 days |
| 1979 | 19 days |
| 1980 | 23 days |
| 1981 | 16 days |
| 1982 | 20 days |
| 1983 | 20 days |
| 1984 | 14 days |
| 1985 | 18 days |
| 1987 | 6 days |
| 1988 | 16 days |
| 1989 | 11 days |
| 1990 | 10 days |
| 1991 | 14 days |
| 1992 | 13 days |
| 1993 | 11 days |
| 1994 | 14 days |
| 1995 | 21 days |
| 1996 | 12 days |
| 1997 | 16 days |
| 1998 | 13 days |
| 1999 | 19 days |
| 2000 | 13 days |
| 2001 | 29 days |
| 2002 | 12 days |
| 2003 | 18 days |
| 2004 | 17 days |
| 2005 | 19 days |
| 2006 | 17 days |
| 2007 | 14 days |
| 2008 | 17 days |
| 2009 | 14 days |
| 2010 | 20 days |
| 2011 | 14 days |
| 2012 | 15 days |
| 2013 | 15 days |
| 2014 | 17 days |
| 2015 | 13 days |
| 2016 | 19 days |
| 2017 | 19 days |
| 2018 | 15 days |
| 2019 | 10 days |
| 2020 | 13 days |
| 2021 | 16 days |
| 2022 | 15 days |
| 2023 | 17 days |
| 2024 | 21 days |
| 2025 | 18 days |
| 2026 | 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
74 years with a frostAcross 74 years with a frost, the median last spring frost at Houlton AP falls on 28 May and the median first autumn frost on 15 September, which leaves a median of 111 days between them.
In 1996 to 2025 the median growing season was 114 days. That is 5 days more than in 1949 to 1978.
Fitted over all years, the growing season changes by +1.7 days per decade at this station.
| Measure | Median, all years | Earliest period (1949 to 1978) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 28 May | 28 May | 28 May | no change | -0.6 days per decade |
| First autumn frost | 15 September | 14 September | 17 September | 3 days later | +1.1 days per decade |
| Growing days | 111 days | 109 days | 114 days | 5 days more | +1.7 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
74 years, 1949 to 2025A day with at least 51.6 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 112.1 mm (4.4 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 51.6 mm (2.0 in) | |
| 5 years | 67.6 mm (2.7 in) | |
| 10 years | 78.3 mm (3.1 in) | |
| 25 years | 91.8 mm (3.6 in) | |
| 50 years | 102.0 mm (4.0 in) | |
| 100 years | 112.1 mm (4.4 in) | Longer than the 74 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, 74 years of values from 1949 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: 132.1 mm (5.2 in) in 1954; 126.2 mm (5.0 in) in 2015; 89.4 mm (3.5 in) in 1969.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Houlton AP, at 1977. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1977 ran 0.3 C (0.6 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1977 | -0.3 | -0.6 | 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
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Houlton AP had a mean temperature of 5.5 C (41.8 F) and 975.6 mm (38.4 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Fergus Shand Dam (Canada, 1,021 km away), Chatham Exp Fa (United States, 1,469 km away) and Berlin (United States, 324 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Fergus Shand Dam | Canada | 1,021 km (634 mi) | 5.6 C (42.1 F) | 937.2 mm (36.9 in) | 0.46 |
| Chatham Exp Fa | United States | 1,469 km (913 mi) | 5.3 C (41.6 F) | 882.2 mm (34.7 in) | 0.60 |
| Berlin | United States | 324 km (201 mi) | 5.5 C (41.9 F) | 937.9 mm (36.9 in) | 0.64 |
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).