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Built 2026-10-18 (18 October 2026)

Arapaho Threshold Days by Year

17 fixed thresholds counted per year at Arapaho (USC00340277): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Arapaho Thresholds

  • Arapaho: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 1911 with 145.
  • Arapaho: days with a maximum temperature at or above 35 C (95 F) in 30 years, most in 1918 with 90.
  • Arapaho: days with a maximum temperature at or above 90 F (32.2 C) in 30 years, most in 1911 with 126.
  • Arapaho: days with a maximum temperature at or above 100 F (37.8 C) in 30 years, most in 1918 with 63.
  • 17 fixed thresholds have at least one qualifying day at Arapaho.
30 years with a qualifying day
Days at or above 30 C (86 F) per year at Arapaho Days per year at Arapaho with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 145 in 1911. 0501001501894: 1121895: 1211896: 1311897: 1271898: 1151899: 1331900: 1181901: 1341904: 1221905: 1201906: 1031907: 1281910: 1391911: 1451912: 1171913: 1211914: 1331915: 921916: 1431917: 1301918: 1411919: 1031920: 1201921: 1411922: 1221923: 1051924: 1101925: 1221927: 1281930: 1131894189719001905191019131916191919221925
Days per year at Arapaho with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 145 in 1911.
Days at or above 30 C (86 F) per year at Arapaho
YearDaysDecade average
1894112123.2
1895121123.2
1896131123.2
1897127123.2
1898115123.2
1899133123.2
1900118120.8
1901134120.8
1904122120.8
1905120120.8
1906103120.8
1907128120.8
1910139126.4
1911145126.4
1912117126.4
1913121126.4
1914133126.4
191592126.4
1916143126.4
1917130126.4
1918141126.4
1919103126.4
1920120121.1
1921141121.1
1922122121.1
1923105121.1
1924110121.1
1925122121.1
1927128121.1
1930113113
First to last qualifying date each year at Arapaho For each year, a bar from the first to the last day at Arapaho meeting 30 C (86 F). 1894: 8 April 1894 to 23 October 18941895: 27 March 1895 to 25 September 18951896: 10 April 1896 to 9 October 18961897: 27 March 1897 to 23 October 18971898: 16 April 1898 to 8 October 18981899: 10 March 1899 to 20 October 18991900: 11 March 1900 to 5 October 19001901: 2 March 1901 to 5 October 19011904: 25 February 1904 to 15 October 19041905: 27 March 1905 to 8 October 19051906: 10 April 1906 to 8 October 19061907: 17 March 1907 to 23 October 19071910: 4 March 1910 to 26 October 19101911: 31 January 1911 to 15 October 19111912: 19 March 1912 to 9 October 19121913: 19 March 1913 to 2 October 19131914: 15 April 1914 to 4 November 19141915: 28 April 1915 to 1 November 19151916: 5 March 1916 to 9 October 19161917: 25 February 1917 to 8 November 19171918: 23 February 1918 to 13 October 19181919: 6 June 1919 to 3 October 19191920: 29 April 1920 to 11 October 19201921: 5 March 1921 to 16 November 19211922: 17 May 1922 to 27 October 19221923: 10 May 1923 to 6 October 19231924: 15 April 1924 to 6 November 19241925: 7 March 1925 to 3 October 19251927: 9 April 1927 to 26 October 19271930: 10 April 1930 to 9 October 193018941898190419101914191819221927JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Arapaho meeting 30 C (86 F).
First to last qualifying date each year at Arapaho
YearFirst dateLast date
18941894-04-081894-10-23
18951895-03-271895-09-25
18961896-04-101896-10-09
18971897-03-271897-10-23
18981898-04-161898-10-08
18991899-03-101899-10-20
19001900-03-111900-10-05
19011901-03-021901-10-05
19041904-02-251904-10-15
19051905-03-271905-10-08
19061906-04-101906-10-08
19071907-03-171907-10-23
19101910-03-041910-10-26
19111911-01-311911-10-15
19121912-03-191912-10-09
19131913-03-191913-10-02
19141914-04-151914-11-04
19151915-04-281915-11-01
19161916-03-051916-10-09
19171917-02-251917-11-08
19181918-02-231918-10-13
19191919-06-061919-10-03
19201920-04-291920-10-11
19211921-03-051921-11-16
19221922-05-171922-10-27
19231923-05-101923-10-06
19241924-04-151924-11-06
19251925-03-071925-10-03
19271927-04-091927-10-26
19301930-04-101930-10-09

Every Fixed Threshold

Fixed thresholds at Arapaho
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days301451911113
35 C (95 F): Days3090191878
40 C (104 F): Days2539191815
45 C (113 F): Days1119111
90 F (32.2 C): Days30126191195
100 F (37.8 C): Days3063191850
110 F (43.3 C): Days9419181
0 C (32 F): Ice days (max2825189518
0 C (32 F): Frost days (min25123190196
-10 C (14 F): Days with min2536189518
-20 C (-4 F): Days with min9518954
20 C (68 F): Tropical nights (min2574191861
25 C (77 F): Days with min10319131
10 mm (0.39 in): Days with 10 mm or more rain3033190617
25 mm (0.98 in): Days with 25 mm or more rain301719208
50 mm (1.97 in): Days with 50 mm or more rain25619233
100 mm (3.94 in): Days with 100 mm or more rain3119071

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

  • Data for Arapaho 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 (2025-12-31).