Berthoud Pass Threshold Days by Year (USC00050674)

11 fixed thresholds counted per year at Berthoud Pass (USC00050674): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Berthoud Pass Thresholds

Berthoud Pass: days with a maximum temperature at or below 0 C (32 F) in 21 years, most in 1970 with 150.
Berthoud Pass: nights with a minimum temperature at or below 0 C (32 F) in 21 years, most in 1965 with 304.
Berthoud Pass: nights with a minimum temperature at or below -10 C (14 F) in 21 years, most in 1968 with 178.
Berthoud Pass: nights with a minimum temperature at or below -20 C (-4 F) in 21 years, most in 1964 with 47.
11 fixed thresholds have at least one qualifying day at Berthoud Pass.

Nights at or below 0 C (32 F)

21 years with a qualifying day

Days per year at Berthoud Pass with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 304 in 1965.

Nights at or below 0 C (32 F) per year at Berthoud Pass
Year	Days	Decade average
1964	284	285.8
1965	304	285.8
1966	280	285.8
1967	277	285.8
1968	294	285.8
1969	276	285.8
1970	271	270.4
1971	277	270.4
1972	261	270.4
1973	251	270.4
1974	275	270.4
1975	284	270.4
1976	278	270.4
1977	260	270.4
1978	276	270.4
1979	271	270.4
1980	277	270.6
1981	259	270.6
1982	280	270.6
1983	270	270.6
1984	267	270.6

For each year, a bar from the first to the last day at Berthoud Pass meeting 0 C (32 F).

First to last qualifying date each year at Berthoud Pass
Year	First date	Last date
1964	1964-01-01	1964-12-31
1965	1965-01-01	1965-12-31
1966	1966-01-01	1966-12-31
1967	1967-01-01	1967-12-31
1968	1968-01-01	1968-12-31
1969	1969-01-01	1969-12-31
1970	1970-01-01	1970-12-31
1971	1971-01-01	1971-12-31
1972	1972-01-01	1972-12-31
1973	1973-01-01	1973-11-30
1974	1974-01-01	1974-12-31
1975	1975-01-01	1975-12-31
1976	1976-01-01	1976-12-31
1977	1977-01-01	1977-12-31
1978	1978-01-01	1978-12-31
1979	1979-01-01	1979-12-31
1980	1980-01-01	1980-12-31
1981	1981-01-01	1981-12-31
1982	1982-01-01	1982-12-31
1983	1983-01-01	1983-12-31
1984	1984-01-01	1984-12-31

Every Fixed Threshold

Fixed thresholds at Berthoud Pass
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
0 C (32 F): Ice days (max	21	150	1970	147
0 C (32 F): Frost days (min	21	304	1965	267
-10 C (14 F): Days with min	21	178	1968	176
-20 C (-4 F): Days with min	21	47	1964	29
-30 C (-22 F): Days with min	12	4	1971	2
10 mm (0.39 in): Days with 10 mm or more rain	21	45	1983	34
25 mm (0.98 in): Days with 25 mm or more rain	18	7	1983	7
50 mm (1.97 in): Days with 50 mm or more rain	3	1	1969	1
10 cm (3.9 in): Days with 10 cm or more snowfall	21	61	1983	51
25 cm (9.8 in): Days with 25 cm or more snowfall	21	12	1979	7
50 cm (19.7 in): Days with 50 cm or more snowfall	3	1	1969	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1964.

Download the Data

Data for Berthoud Pass 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).

Berthoud Pass Threshold Days by Year (USC00050674)

Key Facts for Berthoud Pass Thresholds

Nights at or below 0 C (32 F)

Every Fixed Threshold

Download the Data

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