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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Arch Threshold Days by Year (USC00290525)

15 fixed thresholds counted per year at Arch (USC00290525): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Arch Thresholds

  • Arch: days with 10 mm (0.39 in) or more of precipitation in 25 years, most in 1941 with 40.
  • Arch: days with 25 mm (0.98 in) or more of precipitation in 23 years, most in 1941 with 19.
  • Arch: days with a maximum temperature at or above 30 C (86 F) in 14 years, most in 1998 with 136.
  • Arch: days with a maximum temperature at or above 35 C (95 F) in 14 years, most in 2000 with 70.
  • 15 fixed thresholds have at least one qualifying day at Arch.
14 years with a qualifying day
Days at or above 30 C (86 F) per year at Arch Days per year at Arch with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 136 in 1998. 0501001501990: 1081991: 1061992: 831993: 1031994: 1091995: 1031996: 1081997: 961998: 1361999: 1022000: 1352001: 1302002: 1102003: 1151990199219941996199820002002
Days per year at Arch with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 136 in 1998.
Days at or above 30 C (86 F) per year at Arch
YearDaysDecade average
1990108105.4
1991106105.4
199283105.4
1993103105.4
1994109105.4
1995103105.4
1996108105.4
199796105.4
1998136105.4
1999102105.4
2000135122.5
2001130122.5
2002110122.5
2003115122.5
First to last qualifying date each year at Arch For each year, a bar from the first to the last day at Arch meeting 30 C (86 F). 1990: 17 April 1990 to 28 September 19901991: 8 April 1991 to 18 October 19911992: 11 April 1992 to 14 October 19921993: 19 April 1993 to 7 October 19931994: 19 April 1994 to 30 September 19941995: 15 April 1995 to 19 October 19951996: 11 April 1996 to 15 October 19961997: 22 March 1997 to 6 October 19971998: 25 March 1998 to 16 October 19981999: 10 May 1999 to 16 October 19992000: 6 April 2000 to 4 October 20002001: 22 April 2001 to 2 November 20012002: 15 April 2002 to 29 September 20022003: 14 April 2003 to 30 October 20031990199219941996199820002002JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Arch meeting 30 C (86 F).
First to last qualifying date each year at Arch
YearFirst dateLast date
19901990-04-171990-09-28
19911991-04-081991-10-18
19921992-04-111992-10-14
19931993-04-191993-10-07
19941994-04-191994-09-30
19951995-04-151995-10-19
19961996-04-111996-10-15
19971997-03-221997-10-06
19981998-03-251998-10-16
19991999-05-101999-10-16
20002000-04-062000-10-04
20012001-04-222001-11-02
20022002-04-152002-09-29
20032003-04-142003-10-30

Every Fixed Threshold

Fixed thresholds at Arch
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days141361998115
35 C (95 F): Days1470200042
40 C (104 F): Days9619901
90 F (32.2 C): Days14114200088
100 F (37.8 C): Days1420199814
110 F (43.3 C): Days1119991
0 C (32 F): Ice days (max131619971
0 C (32 F): Frost days (min101381996124
-10 C (14 F): Days with min1026199018
20 C (68 F): Tropical nights (min81020025
10 mm (0.39 in): Days with 10 mm or more rain254019419
25 mm (0.98 in): Days with 25 mm or more rain231919412
50 mm (1.97 in): Days with 50 mm or more rain9219411
10 cm (3.9 in): Days with 10 cm or more snowfall9320011
25 cm (9.8 in): Days with 25 cm or more snowfall1119991

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1990.

Download the Data

  • Data for Arch 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).