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Data as of 2025-12-31
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Built 2026-10-17 (17 October 2026)

Downey Threshold Days by Year

13 fixed thresholds counted per year at Downey (USC00102667): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Downey Thresholds

  • Downey: days with a maximum temperature at or above 30 C (86 F) in 15 years, most in 2024 with 76.
  • Downey: days with a maximum temperature at or above 35 C (95 F) in 15 years, most in 1901 with 23.
  • Downey: days with a maximum temperature at or above 90 F (32.2 C) in 15 years, most in 2021 with 54.
  • Downey: days with a maximum temperature at or below 0 C (32 F) in 15 years, most in 2022 with 73.
  • 13 fixed thresholds have at least one qualifying day at Downey.
15 years with a qualifying day
Days at or above 30 C (86 F) per year at Downey Days per year at Downey with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 76 in 2024. 0204060801898: 671899: 461900: 481901: 542015: 562016: 612017: 682018: 652019: 552020: 692021: 742022: 742023: 452024: 762025: 7418981900201520172019202120232025
Days per year at Downey with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 76 in 2024.
Days at or above 30 C (86 F) per year at Downey
YearDaysDecade average
18986756.5
18994656.5
19004851
19015451
20155661
20166161
20176861
20186561
20195561
20206968.7
20217468.7
20227468.7
20234568.7
20247668.7
20257468.7
First to last qualifying date each year at Downey For each year, a bar from the first to the last day at Downey meeting 30 C (86 F). 1898: 16 June 1898 to 22 September 18981899: 17 June 1899 to 29 September 18991900: 8 June 1900 to 31 August 19001901: 21 June 1901 to 30 August 19012015: 10 June 2015 to 27 September 20152016: 6 June 2016 to 12 September 20162017: 1 June 2017 to 13 September 20172018: 5 June 2018 to 16 September 20182019: 28 June 2019 to 16 September 20192020: 30 May 2020 to 18 September 20202021: 3 June 2021 to 11 September 20212022: 27 May 2022 to 13 September 20222023: 2 July 2023 to 1 September 20232024: 7 June 2024 to 30 September 20242025: 30 May 2025 to 11 September 202518981900201520172019202120232025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Downey meeting 30 C (86 F).
First to last qualifying date each year at Downey
YearFirst dateLast date
18981898-06-161898-09-22
18991899-06-171899-09-29
19001900-06-081900-08-31
19011901-06-211901-08-30
20152015-06-102015-09-27
20162016-06-062016-09-12
20172017-06-012017-09-13
20182018-06-052018-09-16
20192019-06-282019-09-16
20202020-05-302020-09-18
20212021-06-032021-09-11
20222022-05-272022-09-13
20232023-07-022023-09-01
20242024-06-072024-09-30
20252025-05-302025-09-11

Every Fixed Threshold

Fixed thresholds at Downey
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1576202474
35 C (95 F): Days1523190114
90 F (32.2 C): Days1554202150
100 F (37.8 C): Days9519012
0 C (32 F): Ice days (max1573202226
0 C (32 F): Frost days (min142501899182
-10 C (14 F): Days with min1481189832
-20 C (-4 F): Days with min112718981
-30 C (-22 F): Days with min4418983
10 mm (0.39 in): Days with 10 mm or more rain141520167
25 mm (0.98 in): Days with 25 mm or more rain7220182
10 cm (3.9 in): Days with 10 cm or more snowfall10420212
25 cm (9.8 in): Days with 25 cm or more snowfall1220182

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1898.

Download the Data

  • Data for Downey 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).