Upland Threshold Days by Year (USC00049157)

14 fixed thresholds counted per year at Upland (USC00049157): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Upland Thresholds

Upland: days with 10 mm (0.39 in) or more of precipitation in 33 years, most in 1906 with 31.
Upland: days with 25 mm (0.98 in) or more of precipitation in 33 years, most in 1906 with 16.
Upland: days with 50 mm (1.97 in) or more of precipitation in 29 years, most in 1938 with 7.
Upland: nights with a minimum temperature at or below 0 C (32 F) in 23 years, most in 1949 with 31.
14 fixed thresholds have at least one qualifying day at Upland.

Days at or above 30 C (86 F)

22 years with a qualifying day

Days per year at Upland with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 106 in 1910.

Days at or above 30 C (86 F) per year at Upland
Year	Days	Decade average
1903	72	78.6
1904	75	78.6
1905	50	78.6
1906	87	78.6
1907	75	78.6
1908	93	78.6
1909	98	78.6
1910	106	94
1911	82	94
1944	70	86
1945	90	86
1947	90	86
1948	85	86
1949	95	86
1950	76	91.1
1951	99	91.1
1952	99	91.1
1953	91	91.1
1954	91	91.1
1955	90	91.1
1957	95	91.1
1958	88	91.1

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

First to last qualifying date each year at Upland
Year	First date	Last date
1903	1903-05-28	1903-10-25
1904	1904-04-09	1904-10-22
1905	1905-05-15	1905-10-06
1906	1906-04-20	1906-11-14
1907	1907-04-08	1907-10-11
1908	1908-02-26	1908-10-26
1909	1909-03-02	1909-11-03
1910	1910-03-01	1910-10-28
1911	1911-03-29	1911-10-17
1944	1944-01-19	1944-10-27
1945	1945-04-29	1945-11-04
1947	1947-04-11	1947-10-31
1948	1948-01-08	1948-10-25
1949	1949-04-21	1949-11-16
1950	1950-04-16	1950-11-04
1951	1951-02-10	1951-10-19
1952	1952-04-04	1952-10-28
1953	1953-05-05	1953-11-25
1954	1954-02-07	1954-11-21
1955	1955-05-18	1955-11-10
1957	1957-02-13	1957-10-25
1958	1958-04-19	1958-12-03

Every Fixed Threshold

Fixed thresholds at Upland
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	22	106	1910	88
35 C (95 F): Days	22	49	1957	21
40 C (104 F): Days	14	9	1955	1
90 F (32.2 C): Days	22	74	1957	58
100 F (37.8 C): Days	21	15	1957	3
110 F (43.3 C): Days	1	2	1955	2
0 C (32 F): Frost days (min	23	31	1949	1
20 C (68 F): Tropical nights (min	22	23	1958	23
25 C (77 F): Days with min	4	2	1955	1
10 mm (0.39 in): Days with 10 mm or more rain	33	31	1906	17
25 mm (0.98 in): Days with 25 mm or more rain	33	16	1906	11
50 mm (1.97 in): Days with 50 mm or more rain	29	7	1938	3
100 mm (3.94 in): Days with 100 mm or more rain	9	3	1909	1
10 cm (3.9 in): Days with 10 cm or more snowfall	1	1	1949	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1903.

Download the Data

Data for Upland 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).

Upland Threshold Days by Year (USC00049157)

Key Facts for Upland Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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