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

Valley Threshold Days by Year (USC00299304)

12 fixed thresholds counted per year at Valley (USC00299304): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Valley Thresholds

  • Valley: days with 10 mm (0.39 in) or more of precipitation in 8 years, most in 1942 with 21.
  • Valley: days with 25 mm (0.98 in) or more of precipitation in 6 years, most in 1912 with 12.
  • Valley: days with 50 mm (1.97 in) or more of precipitation in 4 years, most in 1942 with 4.
  • Valley: days with 10 cm (3.9 in) or more of snowfall in 2 years, most in 1911 with 7.
  • 12 fixed thresholds have at least one qualifying day at Valley.
8 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Valley Days per year at Valley with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 21 in 1942. 01020301906: 91907: 121908: 71910: 81912: 191942: 211943: 81944: 919061907190819101912194219431944
Days per year at Valley with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 21 in 1942.
Days with 10 mm (0.39 in) or more of precipitation per year at Valley
YearDaysDecade average
190699.3
1907129.3
190879.3
1910813.5
19121913.5
19422112.7
1943812.7
1944912.7
First to last qualifying date each year at Valley For each year, a bar from the first to the last day at Valley meeting 10 mm (0.39 in). 1906: 3 April 1906 to 1 December 19061907: 18 April 1907 to 7 September 19071908: 11 April 1908 to 19 October 19081910: 14 May 1910 to 30 August 19101912: 25 February 1912 to 11 September 19121942: 16 March 1942 to 18 October 19421943: 8 April 1943 to 9 December 19431944: 16 March 1944 to 16 October 194419061907190819101912194219431944JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Valley meeting 10 mm (0.39 in).
First to last qualifying date each year at Valley
YearFirst dateLast date
19061906-04-031906-12-01
19071907-04-181907-09-07
19081908-04-111908-10-19
19101910-05-141910-08-30
19121912-02-251912-09-11
19421942-03-161942-10-18
19431943-04-081943-12-09
19441944-03-161944-10-16

Every Fixed Threshold

Fixed thresholds at Valley
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days186191286
35 C (95 F): Days1919129
90 F (32.2 C): Days143191243
0 C (32 F): Ice days (max1119121
0 C (32 F): Frost days (min11601912160
-10 C (14 F): Days with min117191217
-20 C (-4 F): Days with min1519125
10 mm (0.39 in): Days with 10 mm or more rain82119429
25 mm (0.98 in): Days with 25 mm or more rain61219122
50 mm (1.97 in): Days with 50 mm or more rain4419421
10 cm (3.9 in): Days with 10 cm or more snowfall2719113
25 cm (9.8 in): Days with 25 cm or more snowfall2219111

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1912.

Download the Data

  • Data for Valley 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).