Mtn City Threshold Days by Year (USC00406287)

14 fixed thresholds counted per year at Mtn City (USC00406287): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mtn City Thresholds

Mtn City: days with 10 mm (0.39 in) or more of precipitation in 27 years, most in 1909 with 47.
Mtn City: days with 25 mm (0.98 in) or more of precipitation in 27 years, most in 1911 with 13.
Mtn City: days with a maximum temperature at or below 0 C (32 F) in 14 years, most in 1905 with 20.
Mtn City: nights with a minimum temperature at or below 0 C (32 F) in 14 years, most in 1915 with 139.
14 fixed thresholds have at least one qualifying day at Mtn City.

Days at or above 30 C (86 F)

13 years with a qualifying day

Days per year at Mtn City with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 41 in 1918.

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

First to last qualifying date each year at Mtn City
Year	First date	Last date
1899	1899-06-07	1899-08-20
1902	1902-05-05	1902-07-17
1903	1903-05-24	1903-07-28
1904	1904-05-29	1904-07-19
1905	1905-07-17	1905-07-17
1909	1909-05-30	1909-08-29
1910	1910-06-23	1910-08-17
1911	1911-05-16	1911-08-17
1912	1912-07-14	1912-07-14
1913	1913-06-17	1913-08-09
1914	1914-05-26	1914-08-19
1915	1915-04-26	1915-08-02
1918	1918-05-26	1918-10-16

Every Fixed Threshold

Fixed thresholds at Mtn City
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	13	41	1918	41
35 C (95 F): Days	1	1	1918	1
90 F (32.2 C): Days	5	16	1918	16
0 C (32 F): Ice days (max	14	20	1905	14
0 C (32 F): Frost days (min	14	139	1915	100
-10 C (14 F): Days with min	14	32	1912	20
-20 C (-4 F): Days with min	6	5	1899	2
20 C (68 F): Tropical nights (min	5	4	1918	4
25 C (77 F): Days with min	1	1	1918	1
10 mm (0.39 in): Days with 10 mm or more rain	27	47	1909	37
25 mm (0.98 in): Days with 25 mm or more rain	27	13	1911	10
50 mm (1.97 in): Days with 50 mm or more rain	14	3	1902	1
10 cm (3.9 in): Days with 10 cm or more snowfall	9	4	1905	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	0	n/a	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1899.

Download the Data

Data for Mtn City 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).

Mtn City Threshold Days by Year (USC00406287)

Key Facts for Mtn City Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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