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

Delle Threshold Days by Year (USC00422073)

11 fixed thresholds counted per year at Delle (USC00422073): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Delle Thresholds

  • Delle: days with a maximum temperature at or above 30 C (86 F) in 3 years, most in 1920 with 87.
  • Delle: days with a maximum temperature at or above 35 C (95 F) in 3 years, most in 1920 with 35.
  • Delle: days with a maximum temperature at or above 90 F (32.2 C) in 3 years, most in 1921 with 68.
  • Delle: days with a maximum temperature at or above 100 F (37.8 C) in 3 years, most in 1920 with 12.
  • 11 fixed thresholds have at least one qualifying day at Delle.
3 years with a qualifying day
Days at or above 30 C (86 F) per year at Delle Days per year at Delle with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 87 in 1920. 02550751001920: 871921: 821922: 87192019211922
Days per year at Delle with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 87 in 1920.
Days at or above 30 C (86 F) per year at Delle
YearDaysDecade average
19208785.3
19218285.3
19228785.3
First to last qualifying date each year at Delle For each year, a bar from the first to the last day at Delle meeting 30 C (86 F). 1920: 6 June 1920 to 6 October 19201921: 7 June 1921 to 27 September 19211922: 24 May 1922 to 21 September 1922192019211922JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Delle meeting 30 C (86 F).
First to last qualifying date each year at Delle
YearFirst dateLast date
19201920-06-061920-10-06
19211921-06-071921-09-27
19221922-05-241922-09-21

Every Fixed Threshold

Fixed thresholds at Delle
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days387192087
35 C (95 F): Days335192025
40 C (104 F): Days1119211
90 F (32.2 C): Days368192167
100 F (37.8 C): Days31219207
0 C (32 F): Ice days (max325192225
0 C (32 F): Frost days (min31821922182
-10 C (14 F): Days with min336192236
-20 C (-4 F): Days with min2719227
20 C (68 F): Tropical nights (min31219214
25 C (77 F): Days with min1119221

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1920.

Download the Data

  • Data for Delle 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).