Denio Threshold Days by Year (USC00262229)

15 fixed thresholds counted per year at Denio (USC00262229): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Denio Thresholds

Denio: days with 10 mm (0.39 in) or more of precipitation in 51 years, most in 2015 with 10.
Denio: nights with a minimum temperature at or below 0 C (32 F) in 50 years, most in 1955 with 203.
Denio: nights with a minimum temperature at or below -10 C (14 F) in 50 years, most in 1959 with 51.
Denio: days with a maximum temperature at or above 30 C (86 F) in 44 years, most in 2015 with 107.
15 fixed thresholds have at least one qualifying day at Denio.

Days at or above 30 C (86 F)

44 years with a qualifying day

Days per year at Denio with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 107 in 2015.

Days at or above 30 C (86 F) per year at Denio
Year	Days	Decade average
1952	80	76.6
1953	70	76.6
1954	64	76.6
1955	77	76.6
1956	74	76.6
1957	79	76.6
1958	92	76.6
1959	77	76.6
1960	86	77.7
1963	69	77.7
1967	78	77.7
1970	70	63.5
1971	44	63.5
1972	49	63.5
1974	84	63.5
1975	66	63.5
1976	61	63.5
1978	61	63.5
1979	73	63.5
1980	73	75.4
1981	93	75.4
1982	70	75.4
1983	56	75.4
1984	80	75.4
1985	72	75.4
1986	80	75.4
1988	92	75.4
1989	63	75.4
1990	67	70.5
1991	70	70.5
1992	72	70.5
1994	73	70.5
2002	69	73
2003	82	73
2004	68	73
2005	65	73
2009	81	73
2010	68	89
2011	79	89
2012	100	89
2013	90	89
2014	91	89
2015	107	89
2016	88	89

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

First to last qualifying date each year at Denio
Year	First date	Last date
1952	1952-06-03	1952-10-06
1953	1953-06-21	1953-09-25
1954	1954-05-07	1954-09-27
1955	1955-05-19	1955-09-13
1956	1956-05-17	1956-09-25
1957	1957-06-01	1957-09-24
1958	1958-05-10	1958-10-05
1959	1959-05-12	1959-09-12
1960	1960-05-10	1960-09-27
1963	1963-06-13	1963-10-03
1967	1967-05-16	1967-09-04
1970	1970-05-16	1970-08-31
1971	1971-06-21	1971-09-12
1972	1972-05-28	1972-09-03
1974	1974-05-26	1974-10-01
1975	1975-05-14	1975-09-27
1976	1976-05-13	1976-09-30
1978	1978-06-05	1978-10-07
1979	1979-05-19	1979-09-24
1980	1980-05-20	1980-10-09
1981	1981-04-30	1981-09-19
1982	1982-05-21	1982-09-23
1983	1983-05-23	1983-09-16
1984	1984-04-15	1984-09-19
1985	1985-05-22	1985-08-31
1986	1986-05-25	1986-09-07
1988	1988-05-11	1988-10-03
1989	1989-05-06	1989-09-28
1990	1990-05-05	1990-09-14
1991	1991-06-10	1991-10-16
1992	1992-05-05	1992-09-30
1994	1994-06-10	1994-09-29
2002	2002-05-29	2002-09-23
2003	2003-05-22	2003-09-29
2004	2004-05-02	2004-09-11
2005	2005-06-20	2005-09-08
2009	2009-04-21	2009-09-28
2010	2010-06-14	2010-10-03
2011	2011-06-21	2011-10-01
2012	2012-04-21	2012-09-29
2013	2013-05-11	2013-09-16
2014	2014-05-02	2014-10-08
2015	2015-05-29	2015-10-15
2016	2016-05-13	2016-09-28

Every Fixed Threshold

Fixed thresholds at Denio
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	44	107	2015	88
35 C (95 F): Days	44	47	1955	37
40 C (104 F): Days	15	4	2013	1
90 F (32.2 C): Days	44	80	2015	72
100 F (37.8 C): Days	38	16	1955	10
0 C (32 F): Ice days (max	43	28	2013	11
0 C (32 F): Frost days (min	50	203	1955	149
-10 C (14 F): Days with min	50	51	1959	24
-20 C (-4 F): Days with min	29	7	1972	1
-30 C (-22 F): Days with min	2	1	1972	1
20 C (68 F): Tropical nights (min	26	17	1967	5
10 mm (0.39 in): Days with 10 mm or more rain	51	10	2015	5
25 mm (0.98 in): Days with 25 mm or more rain	13	2	1986	1
10 cm (3.9 in): Days with 10 cm or more snowfall	34	6	1979	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1979	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1952.

Download the Data

Data for Denio 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).

Denio Threshold Days by Year (USC00262229)

Key Facts for Denio Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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