Armstrong Threshold Days by Year

14 fixed thresholds counted per year at Armstrong (USC00410342): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Armstrong Thresholds

Armstrong: days with 10 mm (0.39 in) or more of precipitation in 19 years, most in 1971 with 30.
Armstrong: days with 25 mm (0.98 in) or more of precipitation in 19 years, most in 1971 with 17.
Armstrong: days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1971 with 9.
Armstrong: days with a maximum temperature at or above 30 C (86 F) in 12 years, most in 1963 with 217.
14 fixed thresholds have at least one qualifying day at Armstrong.

Days at or above 30 C (86 F)

12 years with a qualifying day

Days per year at Armstrong with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 217 in 1963.

Days at or above 30 C (86 F) per year at Armstrong
Year	Days	Decade average
1963	217	196
1964	198	196
1965	192	196
1966	180	196
1969	193	196
1970	179	189.4
1971	206	189.4
1972	207	189.4
1973	184	189.4
1974	206	189.4
1975	184	189.4
1976	160	189.4

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

First to last qualifying date each year at Armstrong
Year	First date	Last date
1963	1963-01-10	1963-11-21
1964	1964-03-03	1964-12-30
1965	1965-01-01	1965-12-07
1966	1966-03-02	1966-12-22
1969	1969-01-21	1969-12-19
1970	1970-03-03	1970-12-29
1971	1971-01-03	1971-12-09
1972	1972-01-22	1972-12-05
1973	1973-03-06	1973-12-13
1974	1974-01-09	1974-12-31
1975	1975-01-26	1975-12-14
1976	1976-01-13	1976-10-25

Every Fixed Threshold

Fixed thresholds at Armstrong
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	12	217	1963	160
35 C (95 F): Days	12	119	1963	27
40 C (104 F): Days	7	6	1964	1
90 F (32.2 C): Days	12	187	1963	124
100 F (37.8 C): Days	10	50	1964	18
110 F (43.3 C): Days	1	1	1963	1
0 C (32 F): Frost days (min	11	16	1973	11
-10 C (14 F): Days with min	1	1	1975	1
20 C (68 F): Tropical nights (min	11	155	1963	141
25 C (77 F): Days with min	10	16	1964	6
10 mm (0.39 in): Days with 10 mm or more rain	19	30	1971	30
25 mm (0.98 in): Days with 25 mm or more rain	19	17	1971	10
50 mm (1.97 in): Days with 50 mm or more rain	16	9	1971	3
100 mm (3.94 in): Days with 100 mm or more rain	4	2	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 1963.

Download the Data

Data for Armstrong 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).

Armstrong Threshold Days by Year

Key Facts for Armstrong Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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