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

Aurora Threshold Days by Year

4 fixed thresholds counted per year at Aurora (USC00350343): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Aurora Thresholds

  • Aurora: days with 10 mm (0.39 in) or more of precipitation in 9 years, most in 1955 with 38.
  • Aurora: days with 25 mm (0.98 in) or more of precipitation in 9 years, most in 1955 with 13.
  • Aurora: days with 50 mm (1.97 in) or more of precipitation in 6 years, most in 1961 with 2.
  • Aurora: days with 10 cm (3.9 in) or more of snowfall in 2 years, most in 1956 with 1.
  • 4 fixed thresholds have at least one qualifying day at Aurora.
9 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Aurora Days per year at Aurora with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 38 in 1955. 0102030401901: 311955: 381956: 361958: 291959: 301960: 331961: 311962: 301963: 27190119551956195819591960196119621963
Days per year at Aurora with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 38 in 1955.
Days with 10 mm (0.39 in) or more of precipitation per year at Aurora
YearDaysDecade average
19013131
19553833.3
19563633.3
19582933.3
19593033.3
19603330.3
19613130.3
19623030.3
19632730.3
First to last qualifying date each year at Aurora For each year, a bar from the first to the last day at Aurora meeting 10 mm (0.39 in). 1901: 2 January 1901 to 9 December 19011955: 16 January 1955 to 27 December 19551956: 1 January 1956 to 11 December 19561958: 13 January 1958 to 27 December 19581959: 8 January 1959 to 12 December 19591960: 8 January 1960 to 19 December 19601961: 5 January 1961 to 21 December 19611962: 3 January 1962 to 30 December 19621963: 2 January 1963 to 6 December 196319011956195919611963JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Aurora meeting 10 mm (0.39 in).
First to last qualifying date each year at Aurora
YearFirst dateLast date
19011901-01-021901-12-09
19551955-01-161955-12-27
19561956-01-011956-12-11
19581958-01-131958-12-27
19591959-01-081959-12-12
19601960-01-081960-12-19
19611961-01-051961-12-21
19621962-01-031962-12-30
19631963-01-021963-12-06

Every Fixed Threshold

Fixed thresholds at Aurora
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain938195527
25 mm (0.98 in): Days with 25 mm or more rain91319557
50 mm (1.97 in): Days with 50 mm or more rain6219611
10 cm (3.9 in): Days with 10 cm or more snowfall2119561

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1901.

Download the Data

  • Data for Aurora 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).