Navajo Threshold Days by Year

15 fixed thresholds counted per year at Navajo (USC00025837): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Navajo Thresholds

Navajo: days with a maximum temperature at or above 30 C (86 F) in 12 years, most in 1962 with 99.
Navajo: days with a maximum temperature at or above 35 C (95 F) in 12 years, most in 1962 with 34.
Navajo: days with a maximum temperature at or above 90 F (32.2 C) in 12 years, most in 1962 with 72.
Navajo: days with a maximum temperature at or below 0 C (32 F) in 12 years, most in 1967 with 21.
15 fixed thresholds have at least one qualifying day at Navajo.

Days at or above 30 C (86 F)

12 years with a qualifying day

Days per year at Navajo with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 99 in 1962.

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

First to last qualifying date each year at Navajo
Year	First date	Last date
1962	1962-04-18	1962-09-21
1965	1965-04-30	1965-09-02
1966	1966-05-07	1966-09-29
1967	1967-05-17	1967-09-29
1968	1968-05-26	1968-09-12
1969	1969-05-17	1969-09-28
1970	1970-05-03	1970-09-11
1971	1971-05-01	1971-09-15
1972	1972-05-26	1972-10-01
1973	1973-05-28	1973-10-14
1974	1974-05-09	1974-09-23
1975	1975-06-01	1975-09-03

Every Fixed Threshold

Fixed thresholds at Navajo
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	12	99	1962	66
35 C (95 F): Days	12	34	1962	11
40 C (104 F): Days	1	2	1972	2
90 F (32.2 C): Days	12	72	1962	35
100 F (37.8 C): Days	11	10	1974	10
0 C (32 F): Ice days (max	12	21	1967	15
0 C (32 F): Frost days (min	11	197	1975	197
-10 C (14 F): Days with min	11	48	1971	44
-20 C (-4 F): Days with min	10	12	1967	3
20 C (68 F): Tropical nights (min	1	1	1962	1
10 mm (0.39 in): Days with 10 mm or more rain	12	11	1967	10
25 mm (0.98 in): Days with 25 mm or more rain	8	3	1971	3
50 mm (1.97 in): Days with 50 mm or more rain	2	1	1970	1
10 cm (3.9 in): Days with 10 cm or more snowfall	9	6	1975	6
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1974	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1962.

Download the Data

Data for Navajo 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Year	Days	Decade average
1962	99	72.5
1965	38	72.5
1966	73	72.5
1967	67	72.5
1968	72	72.5
1969	86	72.5
1970	82	75
1971	74	75
1972	68	75
1973	70	75
1974	90	75
1975	66	75

Navajo Threshold Days by Year

Key Facts for Navajo Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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