Arvada 3 N Threshold Days by Year (USC00480380)

17 fixed thresholds counted per year at Arvada 3 N (USC00480380): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Arvada 3 N Thresholds

Arvada 3 N: days with a maximum temperature at or above 30 C (86 F) in 26 years, most in 1940 with 83.
Arvada 3 N: days with a maximum temperature at or above 35 C (95 F) in 26 years, most in 1961 with 47.
Arvada 3 N: days with a maximum temperature at or above 90 F (32.2 C) in 26 years, most in 1961 with 71.
Arvada 3 N: days with a maximum temperature at or above 100 F (37.8 C) in 26 years, most in 1966 with 18.
17 fixed thresholds have at least one qualifying day at Arvada 3 N.

Days at or above 30 C (86 F)

26 years with a qualifying day

Days per year at Arvada 3 N with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 83 in 1940.

Days at or above 30 C (86 F) per year at Arvada 3 N
Year	Days	Decade average
1937	71	74
1938	73	74
1939	78	74
1940	83	73.5
1949	64	73.5
1950	39	63.6
1951	41	63.6
1952	78	63.6
1953	60	63.6
1954	72	63.6
1955	67	63.6
1956	72	63.6
1957	69	63.6
1958	60	63.6
1959	78	63.6
1960	77	65.5
1961	83	65.5
1962	47	65.5
1963	77	65.5
1964	64	65.5
1965	38	65.5
1966	78	65.5
1967	72	65.5
1968	48	65.5
1969	71	65.5
1970	77	77

For each year, a bar from the first to the last day at Arvada 3 N meeting 30 C (86 F).

First to last qualifying date each year at Arvada 3 N
Year	First date	Last date
1937	1937-05-18	1937-10-03
1938	1938-04-30	1938-10-03
1939	1939-04-29	1939-09-21
1940	1940-05-11	1940-09-17
1949	1949-05-27	1949-09-24
1950	1950-06-05	1950-09-08
1951	1951-05-23	1951-08-29
1952	1952-04-26	1952-09-27
1953	1953-06-11	1953-10-01
1954	1954-05-19	1954-10-17
1955	1955-05-01	1955-10-10
1956	1956-05-20	1956-10-07
1957	1957-06-02	1957-10-02
1958	1958-05-11	1958-10-15
1959	1959-06-05	1959-09-15
1960	1960-05-11	1960-10-06
1961	1961-05-10	1961-09-18
1962	1962-04-15	1962-09-07
1963	1963-06-13	1963-10-12
1964	1964-05-17	1964-09-17
1965	1965-07-07	1965-10-09
1966	1966-05-04	1966-09-12
1967	1967-05-23	1967-10-01
1968	1968-06-02	1968-09-14
1969	1969-05-13	1969-09-19
1970	1970-05-17	1970-10-05

Every Fixed Threshold

Fixed thresholds at Arvada 3 N
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	26	83	1940	77
35 C (95 F): Days	26	47	1961	40
40 C (104 F): Days	16	6	1954	2
90 F (32.2 C): Days	26	71	1961	67
100 F (37.8 C): Days	26	18	1966	10
0 C (32 F): Ice days (max	26	58	1949	37
0 C (32 F): Frost days (min	26	216	1956	196
-10 C (14 F): Days with min	26	104	1955	64
-20 C (-4 F): Days with min	26	38	1949	19
-30 C (-22 F): Days with min	20	9	1949	3
-40 C (-40 F): Days with min	2	1	1949	1
20 C (68 F): Tropical nights (min	13	6	1966	1
10 mm (0.39 in): Days with 10 mm or more rain	25	14	1968	7
25 mm (0.98 in): Days with 25 mm or more rain	17	5	1964	3
50 mm (1.97 in): Days with 50 mm or more rain	4	1	1953	1
10 cm (3.9 in): Days with 10 cm or more snowfall	21	4	1949	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1964	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1937.

Download the Data

Data for Arvada 3 N 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).

Arvada 3 N Threshold Days by Year (USC00480380)

Key Facts for Arvada 3 N Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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