Marietta Exp Farm Threshold Days by Year (USC00334926)

13 fixed thresholds counted per year at Marietta Exp Farm (USC00334926): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Marietta Exp Farm Thresholds

Marietta Exp Farm: days with a maximum temperature at or above 30 C (86 F) in 13 years, most in 1921 with 83.
Marietta Exp Farm: days with a maximum temperature at or above 90 F (32.2 C) in 13 years, most in 1919 with 34.
Marietta Exp Farm: days with a maximum temperature at or below 0 C (32 F) in 13 years, most in 1917 with 29.
Marietta Exp Farm: nights with a minimum temperature at or below 0 C (32 F) in 13 years, most in 1917 with 146.
13 fixed thresholds have at least one qualifying day at Marietta Exp Farm.

Days at or above 30 C (86 F)

13 years with a qualifying day

Days per year at Marietta Exp Farm with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 83 in 1921.

Days at or above 30 C (86 F) per year at Marietta Exp Farm
Year	Days	Decade average
1915	37	51.8
1916	60	51.8
1917	36	51.8
1918	57	51.8
1919	69	51.8
1920	27	54.6
1921	83	54.6
1922	63	54.6
1923	62	54.6
1924	46	54.6
1925	67	54.6
1926	52	54.6
1927	37	54.6

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

First to last qualifying date each year at Marietta Exp Farm
Year	First date	Last date
1915	1915-04-24	1915-09-16
1916	1916-04-20	1916-10-08
1917	1917-05-18	1917-09-02
1918	1918-05-17	1918-08-30
1919	1919-04-09	1919-10-04
1920	1920-05-23	1920-09-25
1921	1921-05-19	1921-09-20
1922	1922-05-09	1922-10-06
1923	1923-05-15	1923-09-27
1924	1924-05-06	1924-09-01
1925	1925-04-23	1925-09-26
1926	1926-05-01	1926-09-05
1927	1927-05-09	1927-10-02

Every Fixed Threshold

Fixed thresholds at Marietta Exp Farm
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	13	83	1921	37
35 C (95 F): Days	10	10	1918	2
40 C (104 F): Days	1	2	1918	2
90 F (32.2 C): Days	13	34	1919	13
100 F (37.8 C): Days	1	3	1918	3
0 C (32 F): Ice days (max	13	29	1917	18
0 C (32 F): Frost days (min	13	146	1917	101
-10 C (14 F): Days with min	13	36	1917	14
-20 C (-4 F): Days with min	7	9	1917	3
20 C (68 F): Tropical nights (min	13	29	1921	8
10 mm (0.39 in): Days with 10 mm or more rain	13	44	1927	44
25 mm (0.98 in): Days with 25 mm or more rain	13	12	1922	8
50 mm (1.97 in): Days with 50 mm or more rain	7	2	1917	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

Data for Marietta Exp Farm 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).

Marietta Exp Farm Threshold Days by Year (USC00334926)

Key Facts for Marietta Exp Farm Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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