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Built 2026-10-19 (19 October 2026)

Lewistown 11 SSE Threshold Days by Year (USC00244978)

16 fixed thresholds counted per year at Lewistown 11 SSE (USC00244978): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lewistown 11 SSE Thresholds

  • Lewistown 11 SSE: days with 10 mm (0.39 in) or more of precipitation in 70 years, most in 1962 with 25.
  • Lewistown 11 SSE: days with 25 mm (0.98 in) or more of precipitation in 63 years, most in 1964 with 7.
  • Lewistown 11 SSE: days with 10 cm (3.9 in) or more of snowfall in 50 years, most in 1978 with 29.
  • Lewistown 11 SSE: days with 25 cm (9.8 in) or more of snowfall in 29 years, most in 1985 with 5.
  • 16 fixed thresholds have at least one qualifying day at Lewistown 11 SSE.
21 years with a qualifying day
Days at or above 30 C (86 F) per year at Lewistown 11 SSE Days per year at Lewistown 11 SSE with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 31 in 1955. 0102030401950: 91951: 191952: 181953: 241954: 201955: 311956: 231957: 282011: 252013: 222014: 132016: 92018: 112019: 82020: 162021: 252022: 212023: 142024: 162025: 42026: 151950195319562013201820212024
Days per year at Lewistown 11 SSE with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 31 in 1955.
Days at or above 30 C (86 F) per year at Lewistown 11 SSE
YearDaysDecade average
1950921.5
19511921.5
19521821.5
19532421.5
19542021.5
19553121.5
19562321.5
19572821.5
20112514.7
20132214.7
20141314.7
2016914.7
20181114.7
2019814.7
20201615.9
20212515.9
20222115.9
20231415.9
20241615.9
2025415.9
20261515.9
First to last qualifying date each year at Lewistown 11 SSE For each year, a bar from the first to the last day at Lewistown 11 SSE meeting 30 C (86 F). 1950: 9 July 1950 to 6 September 19501951: 13 July 1951 to 5 August 19511952: 29 June 1952 to 3 September 19521953: 11 June 1953 to 12 September 19531954: 19 May 1954 to 11 September 19541955: 14 July 1955 to 14 September 19551956: 1 June 1956 to 19 September 19561957: 5 July 1957 to 1 October 19572011: 28 June 2011 to 1 October 20112013: 2 July 2013 to 6 September 20132014: 3 July 2014 to 25 September 20142016: 23 June 2016 to 1 September 20162018: 6 July 2018 to 16 August 20182019: 13 July 2019 to 4 September 20192020: 13 June 2020 to 5 September 20202021: 3 June 2021 to 17 August 20212022: 14 July 2022 to 8 September 20222023: 18 July 2023 to 2 September 20232024: 24 June 2024 to 9 September 20242025: 3 July 2025 to 20 August 20252026: 11 July 2026 to 28 August 20261950195319562013201820212024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Lewistown 11 SSE meeting 30 C (86 F).
First to last qualifying date each year at Lewistown 11 SSE
YearFirst dateLast date
19501950-07-091950-09-06
19511951-07-131951-08-05
19521952-06-291952-09-03
19531953-06-111953-09-12
19541954-05-191954-09-11
19551955-07-141955-09-14
19561956-06-011956-09-19
19571957-07-051957-10-01
20112011-06-282011-10-01
20132013-07-022013-09-06
20142014-07-032014-09-25
20162016-06-232016-09-01
20182018-07-062018-08-16
20192019-07-132019-09-04
20202020-06-132020-09-05
20212021-06-032021-08-17
20222022-07-142022-09-08
20232023-07-182023-09-02
20242024-06-242024-09-09
20252025-07-032025-08-20
20262026-07-112026-08-28

Every Fixed Threshold

Fixed thresholds at Lewistown 11 SSE
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2131195515
35 C (95 F): Days10419551
90 F (32.2 C): Days191519555
100 F (37.8 C): Days1119551
0 C (32 F): Ice days (max2187195517
0 C (32 F): Frost days (min21208201398
-10 C (14 F): Days with min2196195520
-20 C (-4 F): Days with min213719508
-30 C (-22 F): Days with min181319501
10 mm (0.39 in): Days with 10 mm or more rain7025196218
25 mm (0.98 in): Days with 25 mm or more rain63719645
50 mm (1.97 in): Days with 50 mm or more rain23320243
100 mm (3.94 in): Days with 100 mm or more rain1120141
10 cm (3.9 in): Days with 10 cm or more snowfall502919785
25 cm (9.8 in): Days with 25 cm or more snowfall29519853
50 cm (19.7 in): Days with 50 cm or more snowfall4119851

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1950.

Download the Data

  • Data for Lewistown 11 SSE threshold days by year: CSV or JSON. Field meanings are on the data page.

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). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-12).