Mesa Threshold Days by Year

14 fixed thresholds counted per year at Mesa (USC00105859): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mesa Thresholds

Mesa: nights with a minimum temperature at or below 0 C (32 F) in 11 years, most in 1948 with 174.
Mesa: nights with a minimum temperature at or below -10 C (14 F) in 11 years, most in 1949 with 52.
Mesa: days with a maximum temperature at or above 30 C (86 F) in 9 years, most in 1949 with 83.
Mesa: days with a maximum temperature at or above 35 C (95 F) in 9 years, most in 1951 with 27.
14 fixed thresholds have at least one qualifying day at Mesa.

Days at or above 30 C (86 F)

9 years with a qualifying day

Days per year at Mesa with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 83 in 1949.

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

First to last qualifying date each year at Mesa
Year	First date	Last date
1914	1914-05-30	1914-09-25
1945	1945-06-18	1945-09-14
1946	1946-04-18	1946-09-14
1947	1947-05-02	1947-09-24
1948	1948-05-26	1948-09-14
1949	1949-05-09	1949-09-27
1950	1950-06-20	1950-09-07
1951	1951-06-15	1951-09-19
1952	1952-05-12	1952-09-29

Every Fixed Threshold

Fixed thresholds at Mesa
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	9	83	1949	77
35 C (95 F): Days	9	27	1951	10
40 C (104 F): Days	3	2	1946	1
90 F (32.2 C): Days	9	54	1952	54
100 F (37.8 C): Days	7	10	1951	1
0 C (32 F): Ice days (max	9	48	1949	28
0 C (32 F): Frost days (min	11	174	1948	153
-10 C (14 F): Days with min	11	52	1949	40
-20 C (-4 F): Days with min	8	17	1949	4
20 C (68 F): Tropical nights (min	9	4	1914	2
10 mm (0.39 in): Days with 10 mm or more rain	9	29	1951	23
25 mm (0.98 in): Days with 25 mm or more rain	9	3	1945	3
10 cm (3.9 in): Days with 10 cm or more snowfall	9	15	1952	15
25 cm (9.8 in): Days with 25 cm or more snowfall	4	2	1952	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1914.

Download the Data

Data for Mesa 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 2026-10-14 (14 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
1914	57	57
1945	65	63
1946	55	63
1947	62	63
1948	50	63
1949	83	63
1950	61	65
1951	57	65
1952	77	65

Mesa Threshold Days by Year

Key Facts for Mesa Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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