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Built 2026-10-19 (19 October 2026)

Round Mountain Threshold Days by Year (USC00047581)

6 fixed thresholds counted per year at Round Mountain (USC00047581): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Round Mountain Thresholds

  • Round Mountain: days with 10 mm (0.39 in) or more of precipitation in 34 years, most in 1998 with 84.
  • Round Mountain: days with 25 mm (0.98 in) or more of precipitation in 34 years, most in 1998 with 44.
  • Round Mountain: days with 50 mm (1.97 in) or more of precipitation in 34 years, most in 1983 with 14.
  • Round Mountain: days with 10 cm (3.9 in) or more of snowfall in 15 years, most in 1982 with 6.
  • 6 fixed thresholds have at least one qualifying day at Round Mountain.
34 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Round Mountain Days per year at Round Mountain with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 84 in 1998. 02550751001971: 401972: 561973: 671974: 461975: 511976: 191977: 401978: 541979: 551980: 361981: 631982: 571983: 801984: 391985: 301986: 501987: 361988: 341989: 351990: 321991: 321992: 431993: 481994: 321996: 611998: 841999: 392002: 372003: 532004: 402005: 582006: 632007: 372008: 26197119751979198319871991199620032007
Days per year at Round Mountain with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 84 in 1998.
Days with 10 mm (0.39 in) or more of precipitation per year at Round Mountain
YearDaysDecade average
19714047.6
19725647.6
19736747.6
19744647.6
19755147.6
19761947.6
19774047.6
19785447.6
19795547.6
19803646
19816346
19825746
19838046
19843946
19853046
19865046
19873646
19883446
19893546
19903246.4
19913246.4
19924346.4
19934846.4
19943246.4
19966146.4
19988446.4
19993946.4
20023744.9
20035344.9
20044044.9
20055844.9
20066344.9
20073744.9
20082644.9
First to last qualifying date each year at Round Mountain For each year, a bar from the first to the last day at Round Mountain meeting 10 mm (0.39 in). 1971: 10 January 1971 to 24 December 19711972: 19 January 1972 to 24 December 19721973: 9 January 1973 to 29 December 19731974: 5 January 1974 to 27 December 19741975: 6 January 1975 to 22 December 19751976: 9 January 1976 to 14 November 19761977: 2 January 1977 to 30 December 19771978: 2 January 1978 to 17 December 19781979: 8 January 1979 to 31 December 19791980: 9 January 1980 to 21 December 19801981: 16 January 1981 to 31 December 19811982: 2 January 1982 to 22 December 19821983: 16 January 1983 to 30 December 19831984: 9 February 1984 to 10 December 19841985: 7 January 1985 to 30 December 19851986: 2 January 1986 to 31 December 19861987: 1 January 1987 to 29 December 19871988: 1 March 1988 to 31 December 19881989: 4 January 1989 to 25 November 19891990: 1 January 1990 to 10 December 19901991: 7 January 1991 to 29 December 19911992: 4 January 1992 to 31 December 19921993: 1 January 1993 to 14 December 19931994: 1 January 1994 to 25 November 19941996: 15 January 1996 to 31 December 19961998: 2 January 1998 to 20 December 19981999: 16 January 1999 to 13 December 19992002: 2 January 2002 to 31 December 20022003: 10 January 2003 to 29 December 20032004: 1 January 2004 to 31 December 20042005: 2 January 2005 to 31 December 20052006: 1 January 2006 to 27 December 20062007: 3 January 2007 to 29 December 20072008: 3 January 2008 to 23 December 20081971197619811986199119982005JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Round Mountain meeting 10 mm (0.39 in).
First to last qualifying date each year at Round Mountain
YearFirst dateLast date
19711971-01-101971-12-24
19721972-01-191972-12-24
19731973-01-091973-12-29
19741974-01-051974-12-27
19751975-01-061975-12-22
19761976-01-091976-11-14
19771977-01-021977-12-30
19781978-01-021978-12-17
19791979-01-081979-12-31
19801980-01-091980-12-21
19811981-01-161981-12-31
19821982-01-021982-12-22
19831983-01-161983-12-30
19841984-02-091984-12-10
19851985-01-071985-12-30
19861986-01-021986-12-31
19871987-01-011987-12-29
19881988-03-011988-12-31
19891989-01-041989-11-25
19901990-01-011990-12-10
19911991-01-071991-12-29
19921992-01-041992-12-31
19931993-01-011993-12-14
19941994-01-011994-11-25
19961996-01-151996-12-31
19981998-01-021998-12-20
19991999-01-161999-12-13
20022002-01-022002-12-31
20032003-01-102003-12-29
20042004-01-012004-12-31
20052005-01-022005-12-31
20062006-01-012006-12-27
20072007-01-032007-12-29
20082008-01-032008-12-23

Every Fixed Threshold

Fixed thresholds at Round Mountain
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3484199826
25 mm (0.98 in): Days with 25 mm or more rain3444199813
50 mm (1.97 in): Days with 50 mm or more rain341419834
100 mm (3.94 in): Days with 100 mm or more rain14319791
10 cm (3.9 in): Days with 10 cm or more snowfall15619821
25 cm (9.8 in): Days with 25 cm or more snowfall7219742

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1971.

Download the Data

  • Data for Round Mountain 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).