Lewistown Weather Records (USC00364992)
Record envelope, standing records and threshold days for Lewistown (USC00364992), Pennsylvania, United States, with 89 years of record.
Key Facts for Lewistown
- Lewistown (USC00364992) is a weather station in Pennsylvania, United States at 40.59 latitude and -77.57 longitude, 140 m (460 ft) above sea level.
- The station reports from 1938 to 2026, 89 years of record.
- 1,464 records set at Lewistown still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Lewistown set a daily record high maximum temperature of 37.2 C (99.0 F) on 4 July 2026.
About the Station
- Location: Pennsylvania, United States, 40.59 latitude, -77.57 longitude.
- Elevation: 140 m (460 ft).
- Period of record: 1938 to 2026, 89 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
10 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 22.2 C (72.0 F) | -27.2 C (-17.0 F) | 10.6 C (51.1 F) | -17.2 C (1.0 F) |
| Feb | 25.6 C (78.1 F) | -25.6 C (-14.1 F) | 12.2 C (54.0 F) | -20.6 C (-5.1 F) |
| Mar | 30.6 C (87.1 F) | -16.1 C (3.0 F) | 29.4 C (84.9 F) | -6.7 C (19.9 F) |
| Apr | 34.4 C (93.9 F) | -9.4 C (15.1 F) | 31.7 C (89.1 F) | -3.9 C (25.0 F) |
| May | 36.1 C (97.0 F) | -3.3 C (26.1 F) | 33.9 C (93.0 F) | 1.1 C (34.0 F) |
| Jun | 38.9 C (102.0 F) | 2.8 C (37.0 F) | 33.3 C (91.9 F) | 5.6 C (42.1 F) |
| Jul | 41.1 C (106.0 F) | 5.0 C (41.0 F) | 37.2 C (99.0 F) | 10.6 C (51.1 F) |
| Aug | 39.4 C (102.9 F) | 3.3 C (37.9 F) | 31.1 C (88.0 F) | 11.7 C (53.1 F) |
| Sep | 39.4 C (102.9 F) | -2.2 C (28.0 F) | 34.4 C (93.9 F) | 5.0 C (41.0 F) |
| Oct | 35.0 C (95.0 F) | -6.1 C (21.0 F) | 28.9 C (84.0 F) | 3.9 C (39.0 F) |
| Nov | 29.4 C (84.9 F) | -14.4 C (6.1 F) | n/a | n/a |
| Dec | 23.9 C (75.0 F) | -26.7 C (-16.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1938 | 12 |
| 1939 | 23 |
| 1940 | 28 |
| 1941 | 23 |
| 1942 | 20 |
| 1943 | 31 |
| 1944 | 16 |
| 1945 | 22 |
| 1946 | 12 |
| 1947 | 23 |
| 1948 | 22 |
| 1949 | 17 |
| 1950 | 25 |
| 1951 | 18 |
| 1952 | 18 |
| 1953 | 27 |
| 1954 | 19 |
| 1955 | 13 |
| 1956 | 23 |
| 1957 | 12 |
| 1958 | 13 |
| 1959 | 17 |
| 1960 | 24 |
| 1961 | 19 |
| 1962 | 11 |
| 1963 | 30 |
| 1964 | 22 |
| 1965 | 20 |
| 1966 | 19 |
| 1967 | 22 |
| 1968 | 19 |
| 1969 | 12 |
| 1970 | 12 |
| 1971 | 7 |
| 1972 | 14 |
| 1973 | 9 |
| 1974 | 23 |
| 1975 | 16 |
| 1976 | 24 |
| 1977 | 19 |
| 1978 | 8 |
| 1979 | 25 |
| 1980 | 22 |
| 1981 | 28 |
| 1982 | 21 |
| 1983 | 10 |
| 1984 | 25 |
| 1985 | 6 |
| 1986 | 13 |
| 1987 | 12 |
| 1988 | 21 |
| 1989 | 26 |
| 1990 | 25 |
| 1991 | 27 |
| 1992 | 7 |
| 1993 | 15 |
| 1994 | 13 |
| 1995 | 16 |
| 1996 | 13 |
| 1997 | 7 |
| 1998 | 24 |
| 1999 | 8 |
| 2000 | 10 |
| 2001 | 17 |
| 2002 | 19 |
| 2003 | 9 |
| 2004 | 6 |
| 2005 | 11 |
| 2006 | 8 |
| 2007 | 15 |
| 2008 | 11 |
| 2009 | 8 |
| 2010 | 9 |
| 2011 | 14 |
| 2012 | 11 |
| 2013 | 12 |
| 2014 | 17 |
| 2015 | 27 |
| 2016 | 12 |
| 2017 | 15 |
| 2018 | 16 |
| 2019 | 12 |
| 2020 | 11 |
| 2021 | 8 |
| 2022 | 7 |
| 2023 | 14 |
| 2024 | 19 |
| 2025 | 7 |
| 2026 | 11 |
All-Time Record Progression
13 new records| Date | Kind | Detail |
|---|---|---|
| 1972-06-22 | Record daily precipitation | Record daily precipitation 89.7 mm (3.5 in) |
| 1977-01-17 | Record low maximum temperature | Record low maximum temperature -13.9 C (7.0 F) |
| 1982-01-18 | Record low maximum temperature | Record low maximum temperature -16.7 C (1.9 F) |
| 1993-03-13 | Record snow depth | Record snow depth 55.9 cm (22.0 in) |
| 1993-11-27 | Record daily precipitation | Record daily precipitation 89.9 mm (3.5 in) |
| 1994-01-19 | Record low maximum temperature | Record low maximum temperature -17.2 C (1.0 F) |
| 1994-01-20 | Record low minimum temperature | Record low minimum temperature -27.2 C (-17.0 F) |
| 1995-10-21 | Record daily precipitation | Record daily precipitation 94.0 mm (3.7 in) |
| 1996-01-12 | Record snow depth | Record snow depth 63.5 cm (25.0 in) |
| 1996-01-13 | Record snow depth | Record snow depth 83.8 cm (33.0 in) |
| 2004-09-18 | Record daily precipitation | Record daily precipitation 137.2 mm (5.4 in) |
| 2011-07-22 | Record high maximum temperature | Record high maximum temperature 40.0 C (104.0 F) |
| 2011-07-23 | Record high maximum temperature | Record high maximum temperature 41.1 C (106.0 F) |
Wettest Day of Each Month
Sep: 137.2 mm (5.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 71.1 mm (2.8 in) | 4 January 1944 |
| Feb | 72.4 mm (2.9 in) | 14 February 1984 |
| Mar | 83.1 mm (3.3 in) | 2 March 1994 |
| Apr | 59.7 mm (2.4 in) | 16 April 1993 |
| May | 95.5 mm (3.8 in) | 16 May 2014 |
| Jun | 89.7 mm (3.5 in) | 22 June 1972 |
| Jul | 71.4 mm (2.8 in) | 22 July 2018 |
| Aug | 69.6 mm (2.7 in) | 3 August 1961 |
| Sep | 137.2 mm (5.4 in) | 18 September 2004 |
| Oct | 100.1 mm (3.9 in) | 1 October 2010 |
| Nov | 89.9 mm (3.5 in) | 27 November 1993 |
| Dec | 63.2 mm (2.5 in) | 25 December 2020 |
Period of Record Coverage
1938 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1938 | 151 | 41% | No |
| 1939 | 356 | 98% | Yes |
| 1940 | 362 | 99% | Yes |
| 1941 | 363 | 99% | Yes |
| 1942 | 329 | 90% | Yes |
| 1943 | 339 | 93% | Yes |
| 1944 | 344 | 94% | Yes |
| 1945 | 320 | 88% | No |
| 1946 | 344 | 94% | Yes |
| 1947 | 349 | 96% | Yes |
| 1948 | 318 | 87% | No |
| 1949 | 363 | 99% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 363 | 99% | Yes |
| 1952 | 365 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 364 | 99% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 363 | 99% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 363 | 99% | Yes |
| 1967 | 363 | 99% | Yes |
| 1968 | 363 | 99% | Yes |
| 1969 | 360 | 99% | Yes |
| 1970 | 313 | 86% | No |
| 1971 | 365 | 100% | Yes |
| 1972 | 313 | 86% | No |
| 1973 | 363 | 99% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 332 | 91% | Yes |
| 1976 | 362 | 99% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 360 | 99% | Yes |
| 1979 | 251 | 69% | No |
| 1980 | 303 | 83% | No |
| 1981 | 337 | 92% | Yes |
| 1982 | 224 | 61% | No |
| 1983 | 314 | 86% | No |
| 1984 | 363 | 99% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 363 | 99% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 363 | 99% | Yes |
| 1992 | 335 | 92% | Yes |
| 1993 | 364 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 336 | 92% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 364 | 100% | Yes |
| 2000 | 335 | 92% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 365 | 100% | Yes |
| 2005 | 364 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 364 | 100% | Yes |
| 2008 | 336 | 92% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 364 | 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 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 279 | 76% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 4 July 2026 | Lewistown, US | daily high max | 37.2 C (99.0 F) | 1.6 C (2.9 F) | 36 years | 22 of 100 (Routine) |
| 3 July 2026 | Lewistown, US | daily high min | 23.3 C (73.9 F) | 1.1 C (2.0 F) | 56 years | 27 of 100 (Routine) |
| 3 July 2026 | Lewistown, US | daily high max | 36.7 C (98.1 F) | 1.1 C (2.0 F) | 8 years | 13 of 100 (Routine) |
| 2 July 2026 | Lewistown, US | daily high min | 22.2 C (72.0 F) | 1.1 C (2.0 F) | 84 years | 36 of 100 (Notable) |
| 2 July 2026 | Lewistown, US | daily high max (Tie) | 36.1 C (97.0 F) | tie | 57 years | 6 of 100 (Routine) |
| 24 May 2026 | Lewistown, US | daily low max | 10.6 C (51.1 F) | 2.2 C (4.0 F) | 57 years | 28 of 100 (Routine) |
| 15 May 2026 | Lewistown, US | daily low max (Tie) | 12.2 C (54.0 F) | tie | 41 years | 5 of 100 (Routine) |
| 30 April 2026 | Lewistown, US | daily rain | 24.1 mm (0.9 in) | 2.3 mm (0.09 in) | 61 years | 20 of 100 (Routine) |
| 22 April 2026 | Lewistown, US | daily low min | -3.9 C (25.0 F) | 0.6 C (1.1 F) | 51 years | 24 of 100 (Routine) |
| 21 April 2026 | Lewistown, US | daily low min (Tie) | -2.8 C (27.0 F) | tie | 69 years | 7 of 100 (Routine) |
| 19 April 2026 | Lewistown, US | daily rain | 18.3 mm (0.7 in) | 0.8 mm (0.03 in) | 4 years | 10 of 100 (Routine) |
| 17 April 2026 | Lewistown, US | daily high min | 14.4 C (57.9 F) | 1.1 C (2.0 F) | 24 years | 17 of 100 (Routine) |
| 16 April 2026 | Lewistown, US | daily high max | 30.6 C (87.1 F) | 1.2 C (2.2 F) | 49 years | 23 of 100 (Routine) |
| 5 April 2026 | Lewistown, US | daily high max | 27.8 C (82.0 F) | 0.6 C (1.1 F) | 76 years | 30 of 100 (Routine) |
| 27 March 2026 | Lewistown, US | daily high max (Tie) | 26.1 C (79.0 F) | tie | 80 years | 8 of 100 (Routine) |
| 23 March 2026 | Lewistown, US | daily high max | 29.4 C (84.9 F) | 3.8 C (6.8 F) | 13 years | 17 of 100 (Routine) |
| 12 March 2026 | Lewistown, US | daily rain | 29.2 mm (1.1 in) | 6.3 mm (0.25 in) | 37 years | 25 of 100 (Routine) |
| 11 March 2026 | Lewistown, US | daily high max | 26.7 C (80.1 F) | 4.5 C (8.1 F) | 9 years | 16 of 100 (Routine) |
| 23 February 2026 | Lewistown, US | daily snowfall | 9.1 cm (3.6 in) | 1.5 cm (0.6 in) | 32 years | 19 of 100 (Routine) |
| 26 January 2026 | Lewistown, US | daily snowfall | 21.3 cm (8.4 in) | 6.1 cm (2.4 in) | 22 years | 24 of 100 (Routine) |
Climate Trend
71 complete years, 1939 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1939 | 12.2 C | +1.18 C |
| 1940 | 10.5 C | -0.52 C |
| 1941 | 11.9 C | +0.92 C |
| 1946 | 11.6 C | +0.67 C |
| 1947 | 11.0 C | +0.07 C |
| 1949 | 11.8 C | +0.86 C |
| 1950 | 10.2 C | -0.81 C |
| 1951 | 10.6 C | -0.33 C |
| 1952 | 11.3 C | +0.30 C |
| 1953 | 11.6 C | +0.61 C |
| 1954 | 10.8 C | -0.15 C |
| 1955 | 11.0 C | +0.07 C |
| 1956 | 10.7 C | -0.30 C |
| 1957 | 11.1 C | +0.09 C |
| 1958 | 9.7 C | -1.28 C |
| 1959 | 11.3 C | +0.29 C |
| 1960 | 10.3 C | -0.70 C |
| 1961 | 10.8 C | -0.17 C |
| 1962 | 10.2 C | -0.78 C |
| 1963 | 9.9 C | -1.10 C |
| 1964 | 10.5 C | -0.44 C |
| 1965 | 10.4 C | -0.62 C |
| 1966 | 10.2 C | -0.82 C |
| 1967 | 10.1 C | -0.89 C |
| 1968 | 10.6 C | -0.42 C |
| 1969 | 10.8 C | -0.20 C |
| 1970 | 11.2 C | +0.18 C |
| 1971 | 11.2 C | +0.22 C |
| 1973 | 11.6 C | +0.66 C |
| 1974 | 11.0 C | +0.01 C |
| 1976 | 10.1 C | -0.89 C |
| 1977 | 10.9 C | -0.06 C |
| 1978 | 10.4 C | -0.57 C |
| 1984 | 10.1 C | -0.85 C |
| 1985 | 10.6 C | -0.42 C |
| 1986 | 10.7 C | -0.32 C |
| 1987 | 10.9 C | -0.08 C |
| 1988 | 10.2 C | -0.77 C |
| 1989 | 9.9 C | -1.08 C |
| 1990 | 11.4 C | +0.46 C |
| 1991 | 11.7 C | +0.71 C |
| 1993 | 10.2 C | -0.73 C |
| 1994 | 10.2 C | -0.74 C |
| 1995 | 10.4 C | -0.57 C |
| 1997 | 10.3 C | -0.71 C |
| 1998 | 12.2 C | +1.18 C |
| 1999 | 11.2 C | +0.25 C |
| 2001 | 11.2 C | +0.22 C |
| 2002 | 11.6 C | +0.60 C |
| 2003 | 10.3 C | -0.69 C |
| 2004 | 10.9 C | -0.12 C |
| 2005 | 11.2 C | +0.19 C |
| 2006 | 11.7 C | +0.72 C |
| 2007 | 10.9 C | -0.11 C |
| 2009 | 10.3 C | -0.63 C |
| 2010 | 11.6 C | +0.61 C |
| 2011 | 11.7 C | +0.71 C |
| 2012 | 12.3 C | +1.30 C |
| 2013 | 11.0 C | +0.01 C |
| 2014 | 10.0 C | -1.02 C |
| 2015 | 11.0 C | +0.06 C |
| 2016 | 12.0 C | +1.00 C |
| 2017 | 11.6 C | +0.66 C |
| 2018 | 11.2 C | +0.21 C |
| 2019 | 11.5 C | +0.49 C |
| 2020 | 11.9 C | +0.89 C |
| 2021 | 11.8 C | +0.86 C |
| 2022 | 11.2 C | +0.19 C |
| 2023 | 12.1 C | +1.16 C |
| 2024 | 12.3 C | +1.34 C |
| 2025 | 11.0 C | +0.04 C |
The annual mean temperature here has risen by 0.07 C (0.01 to 0.13) per decade over 1939 to 2025. In Fahrenheit: 0.12 F (0.01 to 0.23) per decade. The slope is a straight line fitted to 71 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.07 C (0.01 to 0.13) per decade | 0.12 F (0.01 to 0.23) per decade | 1939 to 2025 | 71 | Rise |
| Mean daily maximum | -0.02 C (-0.09 to 0.05) per decade | -0.03 F (-0.16 to 0.10) per decade | 1939 to 2025 | 71 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1939 to 2025 | 71 | 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
1938 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 2011 | 35.6 C (96.1 F) | 89 |
| Coldest night (TNn) | -27.2 C (-17.0 F) | 1994 | -17.8 C (0.0 F) | 89 |
| Wettest day (Rx1day) | 137.2 mm (5.4 in) | 2004 | 61.0 mm (2.4 in) | 89 |
| Wettest five days (Rx5day) | 203.3 mm (8.0 in) | 2011 | 87.9 mm (3.5 in) | 89 |
| Longest dry spell (CDD) | 37 days | 1964 | 17 days | 89 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1938 | 36.1 C (97.0 F) |
| 1939 | 36.1 C (97.0 F) |
| 1940 | 35.6 C (96.1 F) |
| 1941 | 37.2 C (99.0 F) |
| 1942 | 35.0 C (95.0 F) |
| 1943 | 36.7 C (98.1 F) |
| 1944 | 37.8 C (100.0 F) |
| 1945 | 35.0 C (95.0 F) |
| 1946 | 36.1 C (97.0 F) |
| 1947 | 36.7 C (98.1 F) |
| 1948 | 39.4 C (102.9 F) |
| 1949 | 36.7 C (98.1 F) |
| 1950 | 34.4 C (93.9 F) |
| 1951 | 35.6 C (96.1 F) |
| 1952 | 38.9 C (102.0 F) |
| 1953 | 39.4 C (102.9 F) |
| 1954 | 37.2 C (99.0 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 36.7 C (98.1 F) |
| 1957 | 36.7 C (98.1 F) |
| 1958 | 33.3 C (91.9 F) |
| 1959 | 36.1 C (97.0 F) |
| 1960 | 35.0 C (95.0 F) |
| 1961 | 34.4 C (93.9 F) |
| 1962 | 37.2 C (99.0 F) |
| 1963 | 35.6 C (96.1 F) |
| 1964 | 36.7 C (98.1 F) |
| 1965 | 35.6 C (96.1 F) |
| 1966 | 37.2 C (99.0 F) |
| 1967 | 35.0 C (95.0 F) |
| 1968 | 36.1 C (97.0 F) |
| 1969 | 36.7 C (98.1 F) |
| 1970 | 33.9 C (93.0 F) |
| 1971 | 35.0 C (95.0 F) |
| 1972 | 35.0 C (95.0 F) |
| 1973 | 35.0 C (95.0 F) |
| 1974 | 35.0 C (95.0 F) |
| 1975 | 33.9 C (93.0 F) |
| 1976 | 33.3 C (91.9 F) |
| 1977 | 35.6 C (96.1 F) |
| 1978 | 35.0 C (95.0 F) |
| 1979 | 33.9 C (93.0 F) |
| 1980 | 36.7 C (98.1 F) |
| 1981 | 34.4 C (93.9 F) |
| 1982 | 35.0 C (95.0 F) |
| 1983 | 36.7 C (98.1 F) |
| 1984 | 35.0 C (95.0 F) |
| 1985 | 34.4 C (93.9 F) |
| 1986 | 34.4 C (93.9 F) |
| 1987 | 35.6 C (96.1 F) |
| 1988 | 38.9 C (102.0 F) |
| 1989 | 32.8 C (91.0 F) |
| 1990 | 35.6 C (96.1 F) |
| 1991 | 36.1 C (97.0 F) |
| 1992 | 33.3 C (91.9 F) |
| 1993 | 36.1 C (97.0 F) |
| 1994 | 35.0 C (95.0 F) |
| 1995 | 36.7 C (98.1 F) |
| 1996 | 35.6 C (96.1 F) |
| 1997 | 35.0 C (95.0 F) |
| 1998 | 34.4 C (93.9 F) |
| 1999 | 36.1 C (97.0 F) |
| 2000 | 32.8 C (91.0 F) |
| 2001 | 36.7 C (98.1 F) |
| 2002 | 36.1 C (97.0 F) |
| 2003 | 33.3 C (91.9 F) |
| 2004 | 32.2 C (90.0 F) |
| 2005 | 36.1 C (97.0 F) |
| 2006 | 35.0 C (95.0 F) |
| 2007 | 35.0 C (95.0 F) |
| 2008 | 35.0 C (95.0 F) |
| 2009 | 34.4 C (93.9 F) |
| 2010 | 37.8 C (100.0 F) |
| 2011 | 41.1 C (106.0 F) |
| 2012 | 38.3 C (100.9 F) |
| 2013 | 35.6 C (96.1 F) |
| 2014 | 32.8 C (91.0 F) |
| 2015 | 34.4 C (93.9 F) |
| 2016 | 37.8 C (100.0 F) |
| 2017 | 35.0 C (95.0 F) |
| 2018 | 35.6 C (96.1 F) |
| 2019 | 36.1 C (97.0 F) |
| 2020 | 36.7 C (98.1 F) |
| 2021 | 35.6 C (96.1 F) |
| 2022 | 35.6 C (96.1 F) |
| 2023 | 34.4 C (93.9 F) |
| 2024 | 36.7 C (98.1 F) |
| 2025 | 36.1 C (97.0 F) |
| 2026 | 37.2 C (99.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1938 | -14.4 C (6.1 F) |
| 1939 | -13.9 C (7.0 F) |
| 1940 | -17.2 C (1.0 F) |
| 1941 | -15.0 C (5.0 F) |
| 1942 | -21.1 C (-6.0 F) |
| 1943 | -18.3 C (-0.9 F) |
| 1944 | -16.7 C (1.9 F) |
| 1945 | -18.3 C (-0.9 F) |
| 1946 | -20.0 C (-4.0 F) |
| 1947 | -16.7 C (1.9 F) |
| 1948 | -25.6 C (-14.1 F) |
| 1949 | -17.2 C (1.0 F) |
| 1950 | -21.7 C (-7.1 F) |
| 1951 | -22.2 C (-8.0 F) |
| 1952 | -13.3 C (8.1 F) |
| 1953 | -10.6 C (12.9 F) |
| 1954 | -17.8 C (0.0 F) |
| 1955 | -22.2 C (-8.0 F) |
| 1956 | -11.7 C (10.9 F) |
| 1957 | -18.9 C (-2.0 F) |
| 1958 | -18.3 C (-0.9 F) |
| 1959 | -17.8 C (0.0 F) |
| 1960 | -26.7 C (-16.1 F) |
| 1961 | -24.4 C (-11.9 F) |
| 1962 | -18.3 C (-0.9 F) |
| 1963 | -22.2 C (-8.0 F) |
| 1964 | -22.8 C (-9.0 F) |
| 1965 | -20.0 C (-4.0 F) |
| 1966 | -21.1 C (-6.0 F) |
| 1967 | -22.2 C (-8.0 F) |
| 1968 | -24.4 C (-11.9 F) |
| 1969 | -13.3 C (8.1 F) |
| 1970 | -20.0 C (-4.0 F) |
| 1971 | -18.3 C (-0.9 F) |
| 1972 | -18.9 C (-2.0 F) |
| 1973 | -17.2 C (1.0 F) |
| 1974 | -15.0 C (5.0 F) |
| 1975 | -17.2 C (1.0 F) |
| 1976 | -18.3 C (-0.9 F) |
| 1977 | -22.2 C (-8.0 F) |
| 1978 | -20.0 C (-4.0 F) |
| 1979 | -22.2 C (-8.0 F) |
| 1980 | -20.6 C (-5.1 F) |
| 1981 | -21.1 C (-6.0 F) |
| 1982 | -25.0 C (-13.0 F) |
| 1983 | -17.8 C (0.0 F) |
| 1984 | -26.1 C (-15.0 F) |
| 1985 | -25.6 C (-14.1 F) |
| 1986 | -14.4 C (6.1 F) |
| 1987 | -18.9 C (-2.0 F) |
| 1988 | -19.4 C (-2.9 F) |
| 1989 | -21.1 C (-6.0 F) |
| 1990 | -13.9 C (7.0 F) |
| 1991 | -12.2 C (10.0 F) |
| 1992 | -14.4 C (6.1 F) |
| 1993 | -16.1 C (3.0 F) |
| 1994 | -27.2 C (-17.0 F) |
| 1995 | -15.6 C (3.9 F) |
| 1996 | -18.9 C (-2.0 F) |
| 1997 | -17.2 C (1.0 F) |
| 1998 | -13.3 C (8.1 F) |
| 1999 | -15.6 C (3.9 F) |
| 2000 | -14.4 C (6.1 F) |
| 2001 | -12.2 C (10.0 F) |
| 2002 | -14.4 C (6.1 F) |
| 2003 | -15.0 C (5.0 F) |
| 2004 | -16.7 C (1.9 F) |
| 2005 | -17.8 C (0.0 F) |
| 2006 | -12.2 C (10.0 F) |
| 2007 | -16.1 C (3.0 F) |
| 2008 | -14.4 C (6.1 F) |
| 2009 | -20.0 C (-4.0 F) |
| 2010 | -15.6 C (3.9 F) |
| 2011 | -17.8 C (0.0 F) |
| 2012 | -12.2 C (10.0 F) |
| 2013 | -12.2 C (10.0 F) |
| 2014 | -20.6 C (-5.1 F) |
| 2015 | -19.4 C (-2.9 F) |
| 2016 | -15.0 C (5.0 F) |
| 2017 | -13.3 C (8.1 F) |
| 2018 | -18.3 C (-0.9 F) |
| 2019 | -17.2 C (1.0 F) |
| 2020 | -12.8 C (9.0 F) |
| 2021 | -14.4 C (6.1 F) |
| 2022 | -20.0 C (-4.0 F) |
| 2023 | -12.2 C (10.0 F) |
| 2024 | -16.1 C (3.0 F) |
| 2025 | -20.6 C (-5.1 F) |
| 2026 | -20.6 C (-5.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1938 | 36.3 mm (1.4 in) |
| 1939 | 54.9 mm (2.2 in) |
| 1940 | 36.3 mm (1.4 in) |
| 1941 | 45.0 mm (1.8 in) |
| 1942 | 54.6 mm (2.1 in) |
| 1943 | 42.7 mm (1.7 in) |
| 1944 | 71.1 mm (2.8 in) |
| 1945 | 69.1 mm (2.7 in) |
| 1946 | 66.8 mm (2.6 in) |
| 1947 | 66.0 mm (2.6 in) |
| 1948 | 36.6 mm (1.4 in) |
| 1949 | 38.9 mm (1.5 in) |
| 1950 | 72.9 mm (2.9 in) |
| 1951 | 55.9 mm (2.2 in) |
| 1952 | 89.4 mm (3.5 in) |
| 1953 | 84.6 mm (3.3 in) |
| 1954 | 86.4 mm (3.4 in) |
| 1955 | 67.6 mm (2.7 in) |
| 1956 | 37.3 mm (1.5 in) |
| 1957 | 74.2 mm (2.9 in) |
| 1958 | 43.4 mm (1.7 in) |
| 1959 | 62.7 mm (2.5 in) |
| 1960 | 62.0 mm (2.4 in) |
| 1961 | 69.6 mm (2.7 in) |
| 1962 | 61.0 mm (2.4 in) |
| 1963 | 42.9 mm (1.7 in) |
| 1964 | 38.9 mm (1.5 in) |
| 1965 | 57.4 mm (2.3 in) |
| 1966 | 49.0 mm (1.9 in) |
| 1967 | 64.3 mm (2.5 in) |
| 1968 | 44.5 mm (1.8 in) |
| 1969 | 51.3 mm (2.0 in) |
| 1970 | 43.4 mm (1.7 in) |
| 1971 | 40.1 mm (1.6 in) |
| 1972 | 89.7 mm (3.5 in) |
| 1973 | 66.0 mm (2.6 in) |
| 1974 | 63.5 mm (2.5 in) |
| 1975 | 76.2 mm (3.0 in) |
| 1976 | 72.6 mm (2.9 in) |
| 1977 | 61.0 mm (2.4 in) |
| 1978 | 62.0 mm (2.4 in) |
| 1979 | 60.2 mm (2.4 in) |
| 1980 | 40.6 mm (1.6 in) |
| 1981 | 41.9 mm (1.6 in) |
| 1982 | 36.8 mm (1.4 in) |
| 1983 | 40.1 mm (1.6 in) |
| 1984 | 74.2 mm (2.9 in) |
| 1985 | 49.8 mm (2.0 in) |
| 1986 | 51.3 mm (2.0 in) |
| 1987 | 69.6 mm (2.7 in) |
| 1988 | 40.1 mm (1.6 in) |
| 1989 | 67.3 mm (2.6 in) |
| 1990 | 45.5 mm (1.8 in) |
| 1991 | 40.1 mm (1.6 in) |
| 1992 | 48.3 mm (1.9 in) |
| 1993 | 89.9 mm (3.5 in) |
| 1994 | 83.1 mm (3.3 in) |
| 1995 | 94.0 mm (3.7 in) |
| 1996 | 83.3 mm (3.3 in) |
| 1997 | 71.6 mm (2.8 in) |
| 1998 | 49.0 mm (1.9 in) |
| 1999 | 52.1 mm (2.1 in) |
| 2000 | 30.5 mm (1.2 in) |
| 2001 | 53.8 mm (2.1 in) |
| 2002 | 41.1 mm (1.6 in) |
| 2003 | 50.5 mm (2.0 in) |
| 2004 | 137.2 mm (5.4 in) |
| 2005 | 82.6 mm (3.3 in) |
| 2006 | 64.3 mm (2.5 in) |
| 2007 | 47.0 mm (1.9 in) |
| 2008 | 71.1 mm (2.8 in) |
| 2009 | 39.4 mm (1.6 in) |
| 2010 | 100.1 mm (3.9 in) |
| 2011 | 85.3 mm (3.4 in) |
| 2012 | 73.4 mm (2.9 in) |
| 2013 | 68.8 mm (2.7 in) |
| 2014 | 95.5 mm (3.8 in) |
| 2015 | 45.5 mm (1.8 in) |
| 2016 | 35.8 mm (1.4 in) |
| 2017 | 63.8 mm (2.5 in) |
| 2018 | 71.4 mm (2.8 in) |
| 2019 | 41.1 mm (1.6 in) |
| 2020 | 63.2 mm (2.5 in) |
| 2021 | 125.0 mm (4.9 in) |
| 2022 | 66.3 mm (2.6 in) |
| 2023 | 39.4 mm (1.6 in) |
| 2024 | 68.6 mm (2.7 in) |
| 2025 | 50.8 mm (2.0 in) |
| 2026 | 63.5 mm (2.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1938 | 45.5 mm (1.8 in) |
| 1939 | 80.8 mm (3.2 in) |
| 1940 | 77.4 mm (3.0 in) |
| 1941 | 74.4 mm (2.9 in) |
| 1942 | 118.9 mm (4.7 in) |
| 1943 | 85.3 mm (3.4 in) |
| 1944 | 76.7 mm (3.0 in) |
| 1945 | 99.6 mm (3.9 in) |
| 1946 | 79.0 mm (3.1 in) |
| 1947 | 75.2 mm (3.0 in) |
| 1948 | 85.7 mm (3.4 in) |
| 1949 | 54.3 mm (2.1 in) |
| 1950 | 121.9 mm (4.8 in) |
| 1951 | 84.1 mm (3.3 in) |
| 1952 | 145.3 mm (5.7 in) |
| 1953 | 110.0 mm (4.3 in) |
| 1954 | 91.0 mm (3.6 in) |
| 1955 | 126.6 mm (5.0 in) |
| 1956 | 66.3 mm (2.6 in) |
| 1957 | 107.5 mm (4.2 in) |
| 1958 | 58.6 mm (2.3 in) |
| 1959 | 113.0 mm (4.4 in) |
| 1960 | 87.9 mm (3.5 in) |
| 1961 | 80.3 mm (3.2 in) |
| 1962 | 66.8 mm (2.6 in) |
| 1963 | 78.5 mm (3.1 in) |
| 1964 | 56.5 mm (2.2 in) |
| 1965 | 72.1 mm (2.8 in) |
| 1966 | 69.4 mm (2.7 in) |
| 1967 | 94.2 mm (3.7 in) |
| 1968 | 77.8 mm (3.1 in) |
| 1969 | 100.1 mm (3.9 in) |
| 1970 | 79.5 mm (3.1 in) |
| 1971 | 98.1 mm (3.9 in) |
| 1972 | 181.3 mm (7.1 in) |
| 1973 | 94.5 mm (3.7 in) |
| 1974 | 71.4 mm (2.8 in) |
| 1975 | 170.9 mm (6.7 in) |
| 1976 | 108.7 mm (4.3 in) |
| 1977 | 82.3 mm (3.2 in) |
| 1978 | 124.0 mm (4.9 in) |
| 1979 | 152.2 mm (6.0 in) |
| 1980 | 64.0 mm (2.5 in) |
| 1981 | 78.2 mm (3.1 in) |
| 1982 | 96.6 mm (3.8 in) |
| 1983 | 65.5 mm (2.6 in) |
| 1984 | 117.1 mm (4.6 in) |
| 1985 | 78.4 mm (3.1 in) |
| 1986 | 107.1 mm (4.2 in) |
| 1987 | 82.6 mm (3.3 in) |
| 1988 | 58.7 mm (2.3 in) |
| 1989 | 170.0 mm (6.7 in) |
| 1990 | 119.9 mm (4.7 in) |
| 1991 | 62.7 mm (2.5 in) |
| 1992 | 73.7 mm (2.9 in) |
| 1993 | 90.4 mm (3.6 in) |
| 1994 | 110.7 mm (4.4 in) |
| 1995 | 97.0 mm (3.8 in) |
| 1996 | 122.7 mm (4.8 in) |
| 1997 | 94.2 mm (3.7 in) |
| 1998 | 77.5 mm (3.1 in) |
| 1999 | 64.3 mm (2.5 in) |
| 2000 | 52.6 mm (2.1 in) |
| 2001 | 70.9 mm (2.8 in) |
| 2002 | 80.7 mm (3.2 in) |
| 2003 | 92.0 mm (3.6 in) |
| 2004 | 140.0 mm (5.5 in) |
| 2005 | 90.8 mm (3.6 in) |
| 2006 | 128.6 mm (5.1 in) |
| 2007 | 74.4 mm (2.9 in) |
| 2008 | 100.3 mm (3.9 in) |
| 2009 | 79.8 mm (3.1 in) |
| 2010 | 169.7 mm (6.7 in) |
| 2011 | 203.3 mm (8.0 in) |
| 2012 | 88.6 mm (3.5 in) |
| 2013 | 111.2 mm (4.4 in) |
| 2014 | 97.8 mm (3.9 in) |
| 2015 | 68.9 mm (2.7 in) |
| 2016 | 59.7 mm (2.4 in) |
| 2017 | 104.4 mm (4.1 in) |
| 2018 | 147.6 mm (5.8 in) |
| 2019 | 67.9 mm (2.7 in) |
| 2020 | 71.7 mm (2.8 in) |
| 2021 | 172.0 mm (6.8 in) |
| 2022 | 100.9 mm (4.0 in) |
| 2023 | 66.8 mm (2.6 in) |
| 2024 | 103.3 mm (4.1 in) |
| 2025 | 76.5 mm (3.0 in) |
| 2026 | 95.2 mm (3.7 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1938 | 14 days |
| 1939 | 26 days |
| 1940 | 19 days |
| 1941 | 24 days |
| 1942 | 19 days |
| 1943 | 24 days |
| 1944 | 16 days |
| 1945 | 15 days |
| 1946 | 14 days |
| 1947 | 24 days |
| 1948 | 12 days |
| 1949 | 14 days |
| 1950 | 15 days |
| 1951 | 14 days |
| 1952 | 28 days |
| 1953 | 25 days |
| 1954 | 13 days |
| 1955 | 22 days |
| 1956 | 15 days |
| 1957 | 14 days |
| 1958 | 22 days |
| 1959 | 26 days |
| 1960 | 14 days |
| 1961 | 14 days |
| 1962 | 19 days |
| 1963 | 31 days |
| 1964 | 37 days |
| 1965 | 15 days |
| 1966 | 18 days |
| 1967 | 29 days |
| 1968 | 22 days |
| 1969 | 21 days |
| 1970 | 11 days |
| 1971 | 20 days |
| 1972 | 24 days |
| 1973 | 25 days |
| 1974 | 21 days |
| 1975 | 16 days |
| 1976 | 31 days |
| 1977 | 15 days |
| 1978 | 18 days |
| 1979 | 15 days |
| 1980 | 16 days |
| 1981 | 25 days |
| 1982 | 16 days |
| 1983 | 24 days |
| 1984 | 18 days |
| 1985 | 25 days |
| 1986 | 17 days |
| 1987 | 11 days |
| 1988 | 24 days |
| 1989 | 17 days |
| 1990 | 14 days |
| 1991 | 25 days |
| 1992 | 18 days |
| 1993 | 14 days |
| 1994 | 11 days |
| 1995 | 17 days |
| 1996 | 10 days |
| 1997 | 14 days |
| 1998 | 13 days |
| 1999 | 17 days |
| 2000 | 14 days |
| 2001 | 31 days |
| 2002 | 15 days |
| 2003 | 14 days |
| 2004 | 25 days |
| 2005 | 16 days |
| 2006 | 17 days |
| 2007 | 17 days |
| 2008 | 19 days |
| 2009 | 18 days |
| 2010 | 18 days |
| 2011 | 15 days |
| 2012 | 14 days |
| 2013 | 13 days |
| 2014 | 18 days |
| 2015 | 19 days |
| 2016 | 19 days |
| 2017 | 21 days |
| 2018 | 12 days |
| 2019 | 11 days |
| 2020 | 18 days |
| 2021 | 15 days |
| 2022 | 17 days |
| 2023 | 21 days |
| 2024 | 27 days |
| 2025 | 20 days |
| 2026 | 11 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
71 years with a frostAcross 71 years with a frost, the median last spring frost at Lewistown falls on 23 April and the median first autumn frost on 19 October, which leaves a median of 177 days between them.
In 1993 to 2025 the median growing season was 187 days. That is 11 days more than in 1939 to 1974.
Fitted over all years, the growing season changes by +1.9 days per decade at this station.
| Measure | Median, all years | Earliest period (1939 to 1974) | Recent period (1993 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 23 April | 24 April | 22 April | 2 days earlier | -0.7 days per decade |
| First autumn frost | 19 October | 17 October | 26 October | 9 days later | +1.2 days per decade |
| Growing days | 177 days | 176 days | 187 days | 11 days more | +1.9 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
83 years, 1939 to 2025A day with at least 57.3 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 124.9 mm (4.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 57.3 mm (2.3 in) | |
| 5 years | 75.0 mm (3.0 in) | |
| 10 years | 86.9 mm (3.4 in) | |
| 25 years | 102.1 mm (4.0 in) | |
| 50 years | 113.5 mm (4.5 in) | |
| 100 years | 124.9 mm (4.9 in) | Longer than the 83 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, 83 years of values from 1939 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: 137.2 mm (5.4 in) in 2004; 125.0 mm (4.9 in) in 2021; 100.1 mm (3.9 in) in 2010.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Lewistown, at 2020. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2020 ran 0.3 C (0.6 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 2020 | -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, Lewistown had a mean temperature of 11.5 C (52.7 F) and 1,105.2 mm (43.5 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Conowingo Dam (United States, 157 km away), Emmitsburg 2 SE (United States, 104 km away) and Willow Grove NAS (United States, 209 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Conowingo Dam | United States | 157 km (98 mi) | 11.7 C (53.0 F) | 1,118.5 mm (44.0 in) | 0.49 |
| Emmitsburg 2 SE | United States | 104 km (65 mi) | 11.4 C (52.6 F) | 1,092.5 mm (43.0 in) | 0.50 |
| Willow Grove NAS | United States | 209 km (130 mi) | 11.6 C (52.9 F) | 1,157.6 mm (45.6 in) | 0.53 |
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).