Pleasanton Threshold Days by Year (USC00146455)

18 fixed thresholds counted per year at Pleasanton (USC00146455): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Pleasanton Thresholds

Pleasanton: days with 10 mm (0.39 in) or more of precipitation in 55 years, most in 1951 with 48.
Pleasanton: days with 25 mm (0.98 in) or more of precipitation in 55 years, most in 1921 with 19.
Pleasanton: days with 50 mm (1.97 in) or more of precipitation in 48 years, most in 1921 with 7.
Pleasanton: days with 10 cm (3.9 in) or more of snowfall in 25 years, most in 1958 with 5.
18 fixed thresholds have at least one qualifying day at Pleasanton.

Days at or above 30 C (86 F)

13 years with a qualifying day

Days per year at Pleasanton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 103 in 1913.

Days at or above 30 C (86 F) per year at Pleasanton
Year	Days	Decade average
1904	53	61.2
1905	71	61.2
1906	53	61.2
1907	73	61.2
1908	58	61.2
1909	59	61.2
1910	63	80.7
1911	95	80.7
1912	83	80.7
1913	103	80.7
1914	91	80.7
1915	44	80.7
1916	86	80.7

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

First to last qualifying date each year at Pleasanton
Year	First date	Last date
1904	1904-05-22	1904-09-29
1905	1905-04-08	1905-09-27
1906	1906-05-17	1906-10-07
1907	1907-03-19	1907-09-23
1908	1908-05-20	1908-09-25
1909	1909-05-05	1909-10-07
1910	1910-03-22	1910-10-01
1911	1911-05-15	1911-10-01
1912	1912-05-21	1912-10-09
1913	1913-04-17	1913-10-09
1914	1914-04-25	1914-09-17
1915	1915-05-12	1915-10-03
1916	1916-03-21	1916-10-08

Every Fixed Threshold

Fixed thresholds at Pleasanton
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	13	103	1913	86
35 C (95 F): Days	12	63	1913	38
40 C (104 F): Days	3	17	1913	1
90 F (32.2 C): Days	13	86	1913	62
100 F (37.8 C): Days	6	37	1913	15
0 C (32 F): Ice days (max	13	34	1912	32
0 C (32 F): Frost days (min	13	131	1912	104
-10 C (14 F): Days with min	13	34	1905	29
-20 C (-4 F): Days with min	9	11	1905	2
-30 C (-22 F): Days with min	1	1	1905	1
20 C (68 F): Tropical nights (min	13	75	1914	49
25 C (77 F): Days with min	7	10	1913	2
10 mm (0.39 in): Days with 10 mm or more rain	55	48	1951	34
25 mm (0.98 in): Days with 25 mm or more rain	55	19	1921	13
50 mm (1.97 in): Days with 50 mm or more rain	48	7	1921	4
100 mm (3.94 in): Days with 100 mm or more rain	13	2	1927	1
10 cm (3.9 in): Days with 10 cm or more snowfall	25	5	1958	5
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1942	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

Download the Data

Data for Pleasanton 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Pleasanton Threshold Days by Year (USC00146455)

Key Facts for Pleasanton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related