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Built 2026-10-16 (16 October 2026)

Mullan Threshold Days by Year

15 fixed thresholds counted per year at Mullan (USC00106230): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mullan Thresholds

  • Mullan: days with 10 mm (0.39 in) or more of precipitation in 32 years, most in 1982 with 44.
  • Mullan: nights with a minimum temperature at or below 0 C (32 F) in 31 years, most in 1976 with 198.
  • Mullan: nights with a minimum temperature at or below -10 C (14 F) in 31 years, most in 1985 with 63.
  • Mullan: days with 25 mm (0.98 in) or more of precipitation in 31 years, most in 2022 with 11.
  • 15 fixed thresholds have at least one qualifying day at Mullan.
30 years with a qualifying day
Days at or above 30 C (86 F) per year at Mullan Days per year at Mullan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 47 in 2021. 02040601976: 101977: 201978: 141979: 191980: 31981: 251982: 121983: 141984: 231985: 271986: 271987: 311988: 271989: 181990: 291991: 161992: 241993: 81994: 332013: 302014: 242016: 262017: 432018: 252021: 472022: 312023: 332024: 302025: 352026: 231976197919821985198819911994201620212024
Days per year at Mullan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 47 in 2021.
Days at or above 30 C (86 F) per year at Mullan
YearDaysDecade average
19761015.8
19772015.8
19781415.8
19791915.8
1980320.7
19812520.7
19821220.7
19831420.7
19842320.7
19852720.7
19862720.7
19873120.7
19882720.7
19891820.7
19902922
19911622
19922422
1993822
19943322
20133029.6
20142429.6
20162629.6
20174329.6
20182529.6
20214733.2
20223133.2
20233333.2
20243033.2
20253533.2
20262333.2
First to last qualifying date each year at Mullan For each year, a bar from the first to the last day at Mullan meeting 30 C (86 F). 1976: 28 June 1976 to 1 September 19761977: 24 April 1977 to 20 August 19771978: 28 June 1978 to 9 August 19781979: 26 June 1979 to 15 September 19791980: 21 July 1980 to 28 July 19801981: 25 June 1981 to 19 September 19811982: 19 June 1982 to 4 September 19821983: 28 May 1983 to 30 August 19831984: 29 May 1984 to 22 August 19841985: 18 June 1985 to 24 August 19851986: 26 May 1986 to 29 August 19861987: 27 April 1987 to 2 October 19871988: 22 May 1988 to 6 September 19881989: 6 July 1989 to 12 August 19891990: 22 June 1990 to 26 September 19901991: 3 July 1991 to 30 August 19911992: 22 June 1992 to 19 August 19921993: 11 May 1993 to 29 July 19931994: 20 June 1994 to 7 September 19942013: 6 May 2013 to 14 September 20132014: 2 July 2014 to 21 September 20142016: 4 June 2016 to 31 August 20162017: 30 May 2017 to 7 September 20172018: 5 July 2018 to 6 September 20182021: 2 June 2021 to 7 September 20212022: 27 June 2022 to 6 September 20222023: 2 May 2023 to 17 September 20232024: 5 July 2024 to 9 September 20242025: 29 May 2025 to 4 September 20252026: 8 July 2026 to 26 August 202619761980198419881992201420212025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mullan meeting 30 C (86 F).
First to last qualifying date each year at Mullan
YearFirst dateLast date
19761976-06-281976-09-01
19771977-04-241977-08-20
19781978-06-281978-08-09
19791979-06-261979-09-15
19801980-07-211980-07-28
19811981-06-251981-09-19
19821982-06-191982-09-04
19831983-05-281983-08-30
19841984-05-291984-08-22
19851985-06-181985-08-24
19861986-05-261986-08-29
19871987-04-271987-10-02
19881988-05-221988-09-06
19891989-07-061989-08-12
19901990-06-221990-09-26
19911991-07-031991-08-30
19921992-06-221992-08-19
19931993-05-111993-07-29
19941994-06-201994-09-07
20132013-05-062013-09-14
20142014-07-022014-09-21
20162016-06-042016-08-31
20172017-05-302017-09-07
20182018-07-052018-09-06
20212021-06-022021-09-07
20222022-06-272022-09-06
20232023-05-022023-09-17
20242024-07-052024-09-09
20252025-05-292025-09-04
20262026-07-082026-08-26

Every Fixed Threshold

Fixed thresholds at Mullan
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3047202123
35 C (95 F): Days14720211
40 C (104 F): Days1120181
90 F (32.2 C): Days2930202110
100 F (37.8 C): Days3420211
0 C (32 F): Ice days (max3068198512
0 C (32 F): Frost days (min311981976103
-10 C (14 F): Days with min316319858
-20 C (-4 F): Days with min22919903
-30 C (-22 F): Days with min1120241
10 mm (0.39 in): Days with 10 mm or more rain3244198219
25 mm (0.98 in): Days with 25 mm or more rain311120223
50 mm (1.97 in): Days with 50 mm or more rain13320141
10 cm (3.9 in): Days with 10 cm or more snowfall242019904
25 cm (9.8 in): Days with 25 cm or more snowfall12419903

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1976.

Download the Data

  • Data for Mullan 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 (2026-10-14).