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

Brea Dam Threshold Days by Year (USC00041057)

4 fixed thresholds counted per year at Brea Dam (USC00041057): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Brea Dam Thresholds

  • Brea Dam: days with 10 mm (0.39 in) or more of precipitation in 12 years, most in 1958 with 16.
  • Brea Dam: days with 25 mm (0.98 in) or more of precipitation in 11 years, most in 1952 with 6.
  • Brea Dam: days with 50 mm (1.97 in) or more of precipitation in 5 years, most in 1952 with 3.
  • Brea Dam: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1951 with 1.
  • 4 fixed thresholds have at least one qualifying day at Brea Dam.
12 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Brea Dam Days per year at Brea Dam with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 16 in 1958. 051015201949: 61950: 111951: 111952: 151953: 61954: 121955: 101956: 51957: 131958: 161959: 71960: 10194919511953195519571959
Days per year at Brea Dam with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 16 in 1958.
Days with 10 mm (0.39 in) or more of precipitation per year at Brea Dam
YearDaysDecade average
194966
19501110.6
19511110.6
19521510.6
1953610.6
19541210.6
19551010.6
1956510.6
19571310.6
19581610.6
1959710.6
19601010
First to last qualifying date each year at Brea Dam For each year, a bar from the first to the last day at Brea Dam meeting 10 mm (0.39 in). 1949: 20 January 1949 to 19 December 19491950: 9 January 1950 to 20 November 19501951: 11 January 1951 to 31 December 19511952: 13 January 1952 to 31 December 19521953: 7 January 1953 to 15 November 19531954: 13 January 1954 to 10 December 19541955: 2 January 1955 to 14 November 19551956: 26 January 1956 to 9 May 19561957: 13 January 1957 to 17 December 19571958: 26 January 1958 to 24 September 19581959: 6 January 1959 to 25 December 19591960: 11 January 1960 to 27 November 1960194919511953195519571959JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Brea Dam meeting 10 mm (0.39 in).
First to last qualifying date each year at Brea Dam
YearFirst dateLast date
19491949-01-201949-12-19
19501950-01-091950-11-20
19511951-01-111951-12-31
19521952-01-131952-12-31
19531953-01-071953-11-15
19541954-01-131954-12-10
19551955-01-021955-11-14
19561956-01-261956-05-09
19571957-01-131957-12-17
19581958-01-261958-09-24
19591959-01-061959-12-25
19601960-01-111960-11-27

Every Fixed Threshold

Fixed thresholds at Brea Dam
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1216195810
25 mm (0.98 in): Days with 25 mm or more rain11619523
50 mm (1.97 in): Days with 50 mm or more rain5319521
100 mm (3.94 in): Days with 100 mm or more rain1119511

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

  • Data for Brea Dam 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).