Concord River Threshold Days by Year (USC00271678)

14 fixed thresholds counted per year at Concord River (USC00271678): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Concord River Thresholds

Concord River: days with a maximum temperature at or above 30 C (86 F) in 25 years, most in 1900 with 31.
Concord River: days with a maximum temperature at or below 0 C (32 F) in 25 years, most in 1904 with 83.
Concord River: nights with a minimum temperature at or below 0 C (32 F) in 25 years, most in 1904 with 184.
Concord River: nights with a minimum temperature at or below -10 C (14 F) in 25 years, most in 1904 with 85.
14 fixed thresholds have at least one qualifying day at Concord River.

Days at or above 30 C (86 F)

25 years with a qualifying day

Days per year at Concord River with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 31 in 1900.

Days at or above 30 C (86 F) per year at Concord River
Year	Days	Decade average
1885	5	6
1886	6	6
1887	10	6
1888	6	6
1889	3	6
1890	9	19
1891	9	19
1892	17	19
1893	5	19
1894	27	19
1895	26	19
1896	28	19
1897	16	19
1898	24	19
1899	29	19
1900	31	18.7
1901	26	18.7
1902	9	18.7
1903	15	18.7
1904	16	18.7
1905	16	18.7
1906	17	18.7
1907	13	18.7
1908	25	18.7
1909	19	18.7

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

First to last qualifying date each year at Concord River
Year	First date	Last date
1885	1885-04-23	1885-07-17
1886	1886-04-19	1886-08-28
1887	1887-05-10	1887-07-31
1888	1888-04-28	1888-08-05
1889	1889-05-09	1889-05-18
1890	1890-06-24	1890-08-05
1891	1891-05-10	1891-08-11
1892	1892-06-01	1892-08-11
1893	1893-05-23	1893-08-10
1894	1894-06-11	1894-09-09
1895	1895-05-04	1895-09-23
1896	1896-05-09	1896-09-11
1897	1897-06-24	1897-09-10
1898	1898-06-08	1898-09-03
1899	1899-04-30	1899-08-31
1900	1900-05-15	1900-09-06
1901	1901-05-22	1901-09-07
1902	1902-05-23	1902-09-01
1903	1903-05-17	1903-09-15
1904	1904-05-26	1904-09-12
1905	1905-06-16	1905-08-22
1906	1906-05-18	1906-09-21
1907	1907-06-18	1907-08-20
1908	1908-05-26	1908-09-27
1909	1909-06-21	1909-08-25

Every Fixed Threshold

Fixed thresholds at Concord River
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	25	31	1900	19
35 C (95 F): Days	9	5	1901	2
90 F (32.2 C): Days	24	18	1900	9
100 F (37.8 C): Days	1	1	1901	1
0 C (32 F): Ice days (max	25	83	1904	51
0 C (32 F): Frost days (min	25	184	1904	147
-10 C (14 F): Days with min	25	85	1904	37
-20 C (-4 F): Days with min	25	23	1904	5
-30 C (-22 F): Days with min	4	4	1904	4
20 C (68 F): Tropical nights (min	20	11	1887	2
25 C (77 F): Days with min	1	1	1887	1
10 mm (0.39 in): Days with 10 mm or more rain	10	42	1901	29
25 mm (0.98 in): Days with 25 mm or more rain	10	13	1902	8
50 mm (1.97 in): Days with 50 mm or more rain	9	3	1901	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1885.

Download the Data

Data for Concord River 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).

Concord River Threshold Days by Year (USC00271678)

Key Facts for Concord River Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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