Roseville Threshold Days by Year (CA006147188)

12 fixed thresholds counted per year at Roseville (CA006147188): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Roseville Thresholds

Roseville: days with a maximum temperature at or above 30 C (86 F) in 11 years, most in 1983 with 16.
Roseville: days with a maximum temperature at or below 0 C (32 F) in 11 years, most in 1978 with 91.
Roseville: nights with a minimum temperature at or below 0 C (32 F) in 11 years, most in 1978 with 169.
Roseville: nights with a minimum temperature at or below -10 C (14 F) in 11 years, most in 1978 with 72.
12 fixed thresholds have at least one qualifying day at Roseville.

Days at or above 30 C (86 F)

11 years with a qualifying day

Days per year at Roseville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 16 in 1983.

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

First to last qualifying date each year at Roseville
Year	First date	Last date
1973	1973-06-11	1973-09-04
1974	1974-07-03	1974-08-21
1975	1975-05-24	1975-08-02
1976	1976-06-08	1976-09-09
1977	1977-05-17	1977-08-28
1978	1978-06-27	1978-09-06
1979	1979-07-13	1979-07-24
1980	1980-06-24	1980-07-19
1981	1981-06-15	1981-07-09
1982	1982-07-18	1982-07-18
1983	1983-06-13	1983-09-10

Every Fixed Threshold

Fixed thresholds at Roseville
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	11	16	1983	16
90 F (32.2 C): Days	6	7	1973	4
0 C (32 F): Ice days (max	11	91	1978	61
0 C (32 F): Frost days (min	11	169	1978	158
-10 C (14 F): Days with min	11	72	1978	39
-20 C (-4 F): Days with min	11	13	1979	4
-30 C (-22 F): Days with min	3	1	1976	1
20 C (68 F): Tropical nights (min	11	9	1983	9
10 mm (0.39 in): Days with 10 mm or more rain	11	41	1982	33
25 mm (0.98 in): Days with 25 mm or more rain	11	7	1976	5
50 mm (1.97 in): Days with 50 mm or more rain	5	1	1975	1
10 cm (3.9 in): Days with 10 cm or more snowfall	11	6	1977	3

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1973.

Download the Data

Data for Roseville 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).

Roseville Threshold Days by Year (CA006147188)

Key Facts for Roseville Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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