Rock Point Threshold Days by Year (CA004026847)

15 fixed thresholds counted per year at Rock Point (CA004026847): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rock Point Thresholds

Rock Point: days with 10 mm (0.39 in) or more of precipitation in 10 years, most in 1977 with 9.
Rock Point: days with a maximum temperature at or above 30 C (86 F) in 9 years, most in 1981 with 22.
Rock Point: days with a maximum temperature at or above 90 F (32.2 C) in 9 years, most in 1980 with 8.
Rock Point: days with a maximum temperature at or below 0 C (32 F) in 9 years, most in 1982 with 134.
15 fixed thresholds have at least one qualifying day at Rock Point.

Days at or above 30 C (86 F)

9 years with a qualifying day

Days per year at Rock Point with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 22 in 1981.

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

First to last qualifying date each year at Rock Point
Year	First date	Last date
1975	1975-07-04	1975-07-29
1976	1976-05-28	1976-09-17
1977	1977-04-26	1977-08-24
1978	1978-06-05	1978-09-04
1979	1979-06-12	1979-09-16
1980	1980-04-20	1980-09-06
1981	1981-06-26	1981-09-19
1982	1982-06-22	1982-09-09
1983	1983-06-09	1983-09-26

Every Fixed Threshold

Fixed thresholds at Rock Point
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	9	22	1981	18
35 C (95 F): Days	6	5	1983	5
90 F (32.2 C): Days	9	8	1980	7
100 F (37.8 C): Days	1	1	1983	1
0 C (32 F): Ice days (max	9	134	1982	119
0 C (32 F): Frost days (min	9	203	1982	192
-10 C (14 F): Days with min	9	123	1982	93
-20 C (-4 F): Days with min	9	71	1978	33
-30 C (-22 F): Days with min	9	26	1982	12
-40 C (-40 F): Days with min	1	1	1983	1
10 mm (0.39 in): Days with 10 mm or more rain	10	9	1977	9
25 mm (0.98 in): Days with 25 mm or more rain	8	2	1981	1
50 mm (1.97 in): Days with 50 mm or more rain	2	1	1981	1
10 cm (3.9 in): Days with 10 cm or more snowfall	7	4	1982	2
25 cm (9.8 in): Days with 25 cm or more snowfall	1	2	1982	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1975.

Download the Data

Data for Rock Point 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).

Rock Point Threshold Days by Year (CA004026847)

Key Facts for Rock Point Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related