Aurora Threshold Days by Year (CA006150395)

16 fixed thresholds counted per year at Aurora (CA006150395): 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 34 years, most in 1906 with 34.
Aurora: days with 10 cm (3.9 in) or more of snowfall in 34 years, most in 1901 with 10.
Aurora: days with 25 mm (0.98 in) or more of precipitation in 33 years, most in 1901 with 10.
Aurora: days with 50 mm (1.97 in) or more of precipitation in 12 years, most in 1893 with 2.
16 fixed thresholds have at least one qualifying day at Aurora.

Days at or above 30 C (86 F)

10 years with a qualifying day

Days per year at Aurora with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 28 in 1916.

For each year, a bar from the first to the last day at Aurora meeting 30 C (86 F).

First to last qualifying date each year at Aurora
Year	First date	Last date
1909	1909-06-21	1909-08-25
1910	1910-06-20	1910-07-24
1911	1911-05-19	1911-08-22
1912	1912-07-03	1912-09-10
1913	1913-06-16	1913-09-02
1914	1914-05-26	1914-08-09
1915	1915-09-14	1915-09-14
1916	1916-07-07	1916-08-22
1917	1917-07-26	1917-08-01
1918	1918-07-20	1918-08-23

Every Fixed Threshold

Fixed thresholds at Aurora
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	10	28	1916	18
35 C (95 F): Days	3	6	1911	1
90 F (32.2 C): Days	9	12	1911	5
100 F (37.8 C): Days	1	2	1911	2
0 C (32 F): Ice days (max	10	89	1917	77
0 C (32 F): Frost days (min	10	192	1917	172
-10 C (14 F): Days with min	10	84	1917	73
-20 C (-4 F): Days with min	10	24	1912	23
-30 C (-22 F): Days with min	5	4	1914	1
20 C (68 F): Tropical nights (min	9	8	1916	3
10 mm (0.39 in): Days with 10 mm or more rain	34	34	1906	20
25 mm (0.98 in): Days with 25 mm or more rain	33	10	1901	2
50 mm (1.97 in): Days with 50 mm or more rain	12	2	1893	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1894	1
10 cm (3.9 in): Days with 10 cm or more snowfall	34	10	1901	6
25 cm (9.8 in): Days with 25 cm or more snowfall	8	1	1892	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1909.

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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Aurora Threshold Days by Year (CA006150395)

Key Facts for Aurora Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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