Brownlee Dam Threshold Days by Year (USC00101180)

17 fixed thresholds counted per year at Brownlee Dam (USC00101180): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Brownlee Dam Thresholds

Brownlee Dam: days with a maximum temperature at or above 30 C (86 F) in 43 years, most in 1992 with 103.
Brownlee Dam: days with a maximum temperature at or above 35 C (95 F) in 43 years, most in 1967 with 64.
Brownlee Dam: days with a maximum temperature at or above 90 F (32.2 C) in 43 years, most in 1994 with 91.
Brownlee Dam: days with a maximum temperature at or below 0 C (32 F) in 43 years, most in 1985 with 59.
17 fixed thresholds have at least one qualifying day at Brownlee Dam.

Days at or above 30 C (86 F)

43 years with a qualifying day

Days per year at Brownlee Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 103 in 1992.

Days at or above 30 C (86 F) per year at Brownlee Dam
Year	Days	Decade average
1967	102	88.7
1968	75	88.7
1969	89	88.7
1970	89	83.8
1971	78	83.8
1972	90	83.8
1973	90	83.8
1974	95	83.8
1975	76	83.8
1976	68	83.8
1977	90	83.8
1978	63	83.8
1979	99	83.8
1980	79	81.3
1981	84	81.3
1982	72	81.3
1983	74	81.3
1984	79	81.3
1985	78	81.3
1986	88	81.3
1987	81	81.3
1988	96	81.3
1989	82	81.3
1990	91	85.1
1991	89	85.1
1992	103	85.1
1993	68	85.1
1994	102	85.1
1997	77	85.1
1998	77	85.1
1999	74	85.1
2000	78	86.2
2001	90	86.2
2002	84	86.2
2003	98	86.2
2004	74	86.2
2005	78	86.2
2006	92	86.2
2007	96	86.2
2008	86	86.2
2009	86	86.2
2010	71	74.5
2011	78	74.5

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

First to last qualifying date each year at Brownlee Dam
Year	First date	Last date
1967	1967-05-18	1967-09-30
1968	1968-04-30	1968-10-01
1969	1969-05-08	1969-09-29
1970	1970-05-04	1970-10-05
1971	1971-05-04	1971-09-24
1972	1972-05-15	1972-09-19
1973	1973-05-14	1973-09-14
1974	1974-05-27	1974-10-02
1975	1975-05-15	1975-10-04
1976	1976-05-09	1976-10-01
1977	1977-04-23	1977-09-15
1978	1978-06-03	1978-09-27
1979	1979-05-15	1979-10-09
1980	1980-04-29	1980-10-08
1981	1981-04-30	1981-09-19
1982	1982-05-25	1982-09-23
1983	1983-05-23	1983-09-25
1984	1984-05-29	1984-10-08
1985	1985-04-14	1985-09-05
1986	1986-04-22	1986-09-08
1987	1987-04-23	1987-09-23
1988	1988-05-11	1988-10-09
1989	1989-04-19	1989-09-30
1990	1990-04-15	1990-10-02
1991	1991-06-03	1991-10-16
1992	1992-04-30	1992-10-03
1993	1993-05-12	1993-10-05
1994	1994-04-18	1994-09-29
1997	1997-05-11	1997-10-02
1998	1998-05-01	1998-09-18
1999	1999-05-24	1999-09-24
2000	2000-05-22	2000-09-19
2001	2001-05-12	2001-10-02
2002	2002-05-19	2002-09-16
2003	2003-05-16	2003-10-05
2004	2004-05-03	2004-09-12
2005	2005-05-28	2005-09-21
2006	2006-05-12	2006-09-14
2007	2007-04-29	2007-09-17
2008	2008-05-17	2008-10-02
2009	2009-04-22	2009-09-27
2010	2010-06-24	2010-10-03
2011	2011-06-22	2011-10-02

Every Fixed Threshold

Fixed thresholds at Brownlee Dam
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	43	103	1992	78
35 C (95 F): Days	43	64	1967	43
40 C (104 F): Days	41	22	1971	3
45 C (113 F): Days	3	2	2002	1
90 F (32.2 C): Days	43	91	1994	67
100 F (37.8 C): Days	42	40	1971	11
110 F (43.3 C): Days	14	3	1990	2
0 C (32 F): Ice days (max	43	59	1985	7
0 C (32 F): Frost days (min	42	141	1975	74
-10 C (14 F): Days with min	36	44	1985	5
-20 C (-4 F): Days with min	6	10	1979	3
20 C (68 F): Tropical nights (min	41	35	1998	12
25 C (77 F): Days with min	8	2	1990	1
10 mm (0.39 in): Days with 10 mm or more rain	43	22	1979	11
25 mm (0.98 in): Days with 25 mm or more rain	17	3	1979	2
10 cm (3.9 in): Days with 10 cm or more snowfall	22	5	1989	2
25 cm (9.8 in): Days with 25 cm or more snowfall	6	2	1967	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1967.

Download the Data

Data for Brownlee Dam 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).

Brownlee Dam Threshold Days by Year (USC00101180)

Key Facts for Brownlee Dam Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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