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Built 2026-10-16 (16 October 2026)

Lewiston Threshold Days by Year

13 fixed thresholds counted per year at Lewiston (USC00105230): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lewiston Thresholds

  • Lewiston: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 1926 with 13.
  • Lewiston: days with 25 mm (0.98 in) or more of precipitation in 10 years, most in 1927 with 2.
  • Lewiston: days with a maximum temperature at or above 30 C (86 F) in 1 years, most in 1956 with 75.
  • Lewiston: days with a maximum temperature at or above 35 C (95 F) in 1 years, most in 1956 with 35.
  • 13 fixed thresholds have at least one qualifying day at Lewiston.
28 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Lewiston Days per year at Lewiston with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 13 in 1926. 0510151906: 91907: 91908: 41909: 81910: 61911: 11912: 81913: 81914: 41915: 61916: 101917: 81918: 71919: 61920: 41921: 41922: 21923: 81924: 51925: 51926: 131927: 111928: 51929: 51930: 51931: 61932: 71956: 101906190919121915191819211924192719301956
Days per year at Lewiston with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 13 in 1926.
Days with 10 mm (0.39 in) or more of precipitation per year at Lewiston
YearDaysDecade average
190697.5
190797.5
190847.5
190987.5
191066.4
191116.4
191286.4
191386.4
191446.4
191566.4
1916106.4
191786.4
191876.4
191966.4
192046.2
192146.2
192226.2
192386.2
192456.2
192556.2
1926136.2
1927116.2
192856.2
192956.2
193056
193166
193276
19561010
First to last qualifying date each year at Lewiston For each year, a bar from the first to the last day at Lewiston meeting 10 mm (0.39 in). 1906: 29 May 1906 to 20 December 19061907: 28 January 1907 to 1 September 19071908: 25 February 1908 to 14 September 19081909: 7 January 1909 to 22 November 19091910: 19 March 1910 to 11 November 19101911: 4 August 1911 to 4 August 19111912: 24 January 1912 to 7 September 19121913: 21 January 1913 to 24 October 19131914: 10 February 1914 to 11 November 19141915: 1 February 1915 to 2 October 19151916: 24 January 1916 to 25 November 19161917: 8 April 1917 to 26 December 19171918: 11 January 1918 to 13 October 19181919: 22 January 1919 to 10 December 19191920: 16 January 1920 to 1 May 19201921: 21 May 1921 to 20 November 19211922: 11 August 1922 to 16 November 19221923: 5 January 1923 to 28 December 19231924: 1 February 1924 to 21 November 19241925: 6 May 1925 to 21 December 19251926: 5 January 1926 to 1 December 19261927: 31 March 1927 to 1 December 19271928: 1 January 1928 to 29 June 19281929: 5 April 1929 to 12 December 19291930: 13 February 1930 to 3 May 19301931: 30 March 1931 to 17 December 19311932: 4 March 1932 to 16 November 19321956: 15 January 1956 to 11 December 19561906191019141918192219261930JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Lewiston meeting 10 mm (0.39 in).
First to last qualifying date each year at Lewiston
YearFirst dateLast date
19061906-05-291906-12-20
19071907-01-281907-09-01
19081908-02-251908-09-14
19091909-01-071909-11-22
19101910-03-191910-11-11
19111911-08-041911-08-04
19121912-01-241912-09-07
19131913-01-211913-10-24
19141914-02-101914-11-11
19151915-02-011915-10-02
19161916-01-241916-11-25
19171917-04-081917-12-26
19181918-01-111918-10-13
19191919-01-221919-12-10
19201920-01-161920-05-01
19211921-05-211921-11-20
19221922-08-111922-11-16
19231923-01-051923-12-28
19241924-02-011924-11-21
19251925-05-061925-12-21
19261926-01-051926-12-01
19271927-03-311927-12-01
19281928-01-011928-06-29
19291929-04-051929-12-12
19301930-02-131930-05-03
19311931-03-301931-12-17
19321932-03-041932-11-16
19561956-01-151956-12-11

Every Fixed Threshold

Fixed thresholds at Lewiston
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days175195675
35 C (95 F): Days135195635
40 C (104 F): Days1819568
90 F (32.2 C): Days156195656
100 F (37.8 C): Days117195617
0 C (32 F): Ice days (max113195613
0 C (32 F): Frost days (min192195692
-10 C (14 F): Days with min110195610
-20 C (-4 F): Days with min1119561
20 C (68 F): Tropical nights (min1219562
10 mm (0.39 in): Days with 10 mm or more rain2813192610
25 mm (0.98 in): Days with 25 mm or more rain10219272
50 mm (1.97 in): Days with 50 mm or more rain1119311

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1956.

Download the Data

  • Data for Lewiston 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).