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Built 2026-10-18 (18 October 2026)

Petroglyph Natl Mon Threshold Days by Year

14 fixed thresholds counted per year at Petroglyph Natl Mon (USC00296754): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Petroglyph Natl Mon Thresholds

  • Petroglyph Natl Mon: days with 10 mm (0.39 in) or more of precipitation in 27 years, most in 2000 with 12.
  • Petroglyph Natl Mon: days with a maximum temperature at or above 30 C (86 F) in 22 years, most in 2000 with 138.
  • Petroglyph Natl Mon: days with a maximum temperature at or above 35 C (95 F) in 22 years, most in 2000 with 73.
  • Petroglyph Natl Mon: days with a maximum temperature at or above 90 F (32.2 C) in 22 years, most in 2000 with 113.
  • 14 fixed thresholds have at least one qualifying day at Petroglyph Natl Mon.
22 years with a qualifying day
Days at or above 30 C (86 F) per year at Petroglyph Natl Mon Days per year at Petroglyph Natl Mon with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 138 in 2000. 0501001501995: 971996: 1221997: 1131998: 1151999: 1102000: 1382001: 1292004: 1062005: 1082006: 892007: 972008: 982009: 902010: 1152018: 1212019: 1032020: 1302021: 922022: 1172023: 1072024: 1172026: 10619951998200120062009201920222026
Days per year at Petroglyph Natl Mon with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 138 in 2000.
Days at or above 30 C (86 F) per year at Petroglyph Natl Mon
YearDaysDecade average
199597111.4
1996122111.4
1997113111.4
1998115111.4
1999110111.4
2000138106.9
2001129106.9
2004106106.9
2005108106.9
200689106.9
200797106.9
200898106.9
200990106.9
2010115113
2018121113
2019103113
2020130111.5
202192111.5
2022117111.5
2023107111.5
2024117111.5
2026106111.5
First to last qualifying date each year at Petroglyph Natl Mon For each year, a bar from the first to the last day at Petroglyph Natl Mon meeting 30 C (86 F). 1995: 15 May 1995 to 27 September 19951996: 24 April 1996 to 12 October 19961997: 4 May 1997 to 1 October 19971998: 19 May 1998 to 15 October 19981999: 9 May 1999 to 13 October 19992000: 19 April 2000 to 5 October 20002001: 30 April 2001 to 6 October 20012004: 5 May 2004 to 18 September 20042005: 19 May 2005 to 28 September 20052006: 8 May 2006 to 31 August 20062007: 29 May 2007 to 25 October 20072008: 18 May 2008 to 24 September 20082009: 5 May 2009 to 30 September 20092010: 5 May 2010 to 1 October 20102018: 11 April 2018 to 30 September 20182019: 1 May 2019 to 30 September 20192020: 26 April 2020 to 14 October 20202021: 1 May 2021 to 31 August 20212022: 22 April 2022 to 25 September 20222023: 1 May 2023 to 19 October 20232024: 18 May 2024 to 12 October 20242026: 19 March 2026 to 13 September 202619951998200120062009201920222026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Petroglyph Natl Mon meeting 30 C (86 F).
First to last qualifying date each year at Petroglyph Natl Mon
YearFirst dateLast date
19951995-05-151995-09-27
19961996-04-241996-10-12
19971997-05-041997-10-01
19981998-05-191998-10-15
19991999-05-091999-10-13
20002000-04-192000-10-05
20012001-04-302001-10-06
20042004-05-052004-09-18
20052005-05-192005-09-28
20062006-05-082006-08-31
20072007-05-292007-10-25
20082008-05-182008-09-24
20092009-05-052009-09-30
20102010-05-052010-10-01
20182018-04-112018-09-30
20192019-05-012019-09-30
20202020-04-262020-10-14
20212021-05-012021-08-31
20222022-04-222022-09-25
20232023-05-012023-10-19
20242024-05-182024-10-12
20262026-03-192026-09-13

Every Fixed Threshold

Fixed thresholds at Petroglyph Natl Mon
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days221382000106
35 C (95 F): Days2273200066
40 C (104 F): Days6319953
90 F (32.2 C): Days22113200095
100 F (37.8 C): Days2123202317
0 C (32 F): Ice days (max9320181
0 C (32 F): Frost days (min21127199650
-10 C (14 F): Days with min201319972
20 C (68 F): Tropical nights (min2037202334
25 C (77 F): Days with min2120181
10 mm (0.39 in): Days with 10 mm or more rain271220004
25 mm (0.98 in): Days with 25 mm or more rain16219971
50 mm (1.97 in): Days with 50 mm or more rain1119991
10 cm (3.9 in): Days with 10 cm or more snowfall5320061

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1995.

Download the Data

  • Data for Petroglyph Natl Mon 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 (2026-10-17).