Concord River Weather Records (USC00271678)

Record envelope, standing records and threshold days for Concord River (USC00271678), New Hampshire, United States, with 56 years of record.

Key Facts for Concord River

Concord River (USC00271678) is a weather station in New Hampshire, United States at 43.22 latitude and -71.52 longitude, 66 m (217 ft) above sea level.
The station reports from 1884 to 1939, 56 years of record.
1,464 records set at Concord River still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: New Hampshire, United States, 43.22 latitude, -71.52 longitude.
Elevation: 66 m (217 ft).
Period of record: 1884 to 1939, 56 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Concord River. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Concord River, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	17.8 C (64.0 F)	-33.9 C (-29.0 F)	n/a	n/a
Feb	18.3 C (64.9 F)	-35.6 C (-32.1 F)	n/a	n/a
Mar	24.4 C (75.9 F)	-24.4 C (-11.9 F)	n/a	n/a
Apr	31.1 C (88.0 F)	-11.1 C (12.0 F)	n/a	n/a
May	33.3 C (91.9 F)	-5.6 C (21.9 F)	n/a	n/a
Jun	37.8 C (100.0 F)	1.1 C (34.0 F)	n/a	n/a
Jul	36.7 C (98.1 F)	2.8 C (37.0 F)	n/a	n/a
Aug	34.4 C (93.9 F)	1.7 C (35.1 F)	n/a	n/a
Sep	32.8 C (91.0 F)	-3.3 C (26.1 F)	n/a	n/a
Oct	29.4 C (84.9 F)	-8.3 C (17.1 F)	n/a	n/a
Nov	23.3 C (73.9 F)	-18.3 C (-0.9 F)	n/a	n/a
Dec	17.2 C (63.0 F)	-30.6 C (-23.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Concord River still stand. 1903 holds the most, with 76.

Standing records at Concord River by the year they were set
Year set	Standing records
1884	18
1885	53
1886	63
1887	61
1888	68
1889	50
1890	46
1891	57
1892	61
1893	56
1894	53
1895	55
1896	61
1897	49
1898	58
1899	66
1900	67
1901	49
1902	55
1903	76
1904	58
1905	43
1906	45
1907	51
1908	52
1909	46
1933	7
1934	28
1939	12

Wettest Day of Each Month

Jul: 129.8 mm (5.1 in)

The wettest day on record for each calendar month at Concord River. The most was 129.8 mm (5.1 in) on 23 July 1887.

Record daily precipitation for each month at Concord River
Month	Record daily precipitation (mm)	Date
Jan	53.3 mm (2.1 in)	26 January 1888
Feb	70.4 mm (2.8 in)	12 February 1886
Mar	61.0 mm (2.4 in)	12 March 1888
Apr	76.5 mm (3.0 in)	7 April 1901
May	72.4 mm (2.9 in)	17 May 1916
Jun	74.4 mm (2.9 in)	20 June 1903
Jul	129.8 mm (5.1 in)	23 July 1887
Aug	84.3 mm (3.3 in)	7 August 1901
Sep	85.3 mm (3.4 in)	20 September 1888
Oct	64.8 mm (2.6 in)	13 October 1895
Nov	61.0 mm (2.4 in)	2 November 1897
Dec	57.7 mm (2.3 in)	3 December 1905

Period of Record Coverage

1884 to 1939

29 years of record at Concord River, 1884 to 1939. 4 years have data for under 90 percent of days and are left out of rankings: 1884, 1933, 1934, 1939.

Days with data per year at Concord River
Year	Days with data	Share of year	Complete
1884	53	14%	No
1885	351	96%	Yes
1886	351	96%	Yes
1887	350	96%	Yes
1888	350	96%	Yes
1889	351	96%	Yes
1890	349	96%	Yes
1891	349	96%	Yes
1892	358	98%	Yes
1893	348	95%	Yes
1894	354	97%	Yes
1895	347	95%	Yes
1896	356	97%	Yes
1897	357	98%	Yes
1898	365	100%	Yes
1899	365	100%	Yes
1900	365	100%	Yes
1901	364	100%	Yes
1902	363	99%	Yes
1903	364	100%	Yes
1904	366	100%	Yes
1905	365	100%	Yes
1906	365	100%	Yes
1907	365	100%	Yes
1908	366	100%	Yes
1909	363	99%	Yes
1933	30	8%	No
1934	211	58%	No
1939	31	8%	No

Latest Records

No records were set at this station in the latest data.

Climate Trend

25 complete years, 1885 to 1909

One stripe for each of 25 complete years at Concord River, 1885 to 1909. Blue stripes are years cooler than the station's own mean of 7.3 C (45.2 F); red stripes are warmer. The coolest year was 1893, at 5.4 C (41.6 F), and the warmest was 1889, at 8.7 C (47.7 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at Concord River as warming stripes, 1885 to 1909
Year	Annual mean temperature	Difference from the station mean
1885	6.8 C	-0.49 C
1886	7.8 C	+0.51 C
1887	7.6 C	+0.25 C
1888	6.8 C	-0.53 C
1889	8.7 C	+1.39 C
1890	7.3 C	+0.02 C
1891	8.2 C	+0.88 C
1892	7.5 C	+0.16 C
1893	5.4 C	-1.95 C
1894	7.6 C	+0.28 C
1895	7.5 C	+0.19 C
1896	7.4 C	+0.08 C
1897	7.5 C	+0.22 C
1898	8.0 C	+0.69 C
1899	7.2 C	-0.09 C
1900	7.6 C	+0.29 C
1901	7.2 C	-0.08 C
1902	7.2 C	-0.10 C
1903	7.0 C	-0.30 C
1904	5.8 C	-1.51 C
1905	7.0 C	-0.34 C
1906	7.6 C	+0.33 C
1907	6.6 C	-0.73 C
1908	8.0 C	+0.65 C
1909	7.6 C	+0.29 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1884 to 1939

Yearly extremes at Concord River: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	1901	34.4 C (93.9 F)	29
Coldest night (TNn)	-35.6 C (-32.1 F)	1898	-26.1 C (-15.0 F)	29
Wettest day (Rx1day)	129.8 mm (5.1 in)	1887	57.7 mm (2.3 in)	41
Wettest five days (Rx5day)	148.4 mm (5.8 in)	1897	64.0 mm (2.5 in)	39
Longest dry spell (CDD)	34 days	1908	16 days	40

Hottest day (TXx)

The hottest day of the year at Concord River, 1884 to 1939. The record is 37.8 C (100.0 F) in 1901, marked on the chart; the median year is 34.4 C (93.9 F).

Hottest day (TXx) at Concord River by year
Year	Hottest day (TXx)
1884	17.2 C (63.0 F)
1885	32.8 C (91.0 F)
1886	33.9 C (93.0 F)
1887	33.9 C (93.0 F)
1888	34.4 C (93.9 F)
1889	33.3 C (91.9 F)
1890	32.8 C (91.0 F)
1891	35.6 C (96.1 F)
1892	33.9 C (93.0 F)
1893	32.2 C (90.0 F)
1894	35.6 C (96.1 F)
1895	35.0 C (95.0 F)
1896	34.4 C (93.9 F)
1897	36.7 C (98.1 F)
1898	35.6 C (96.1 F)
1899	36.1 C (97.0 F)
1900	35.6 C (96.1 F)
1901	37.8 C (100.0 F)
1902	31.7 C (89.1 F)
1903	33.9 C (93.0 F)
1904	34.4 C (93.9 F)
1905	34.4 C (93.9 F)
1906	33.9 C (93.0 F)
1907	34.4 C (93.9 F)
1908	35.0 C (95.0 F)
1909	34.4 C (93.9 F)
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1925	n/a
1933	31.1 C (88.0 F)
1934	35.0 C (95.0 F)
1939	36.1 C (97.0 F)

Coldest night (TNn)

The coldest night of the year at Concord River, 1884 to 1939. The record is -35.6 C (-32.1 F) in 1898, marked on the chart; the median year is -26.1 C (-15.0 F).

Coldest night (TNn) at Concord River by year
Year	Coldest night (TNn)
1884	-27.2 C (-17.0 F)
1885	-27.2 C (-17.0 F)
1886	-28.9 C (-20.0 F)
1887	-28.3 C (-18.9 F)
1888	-26.7 C (-16.1 F)
1889	-25.6 C (-14.1 F)
1890	-23.9 C (-11.0 F)
1891	-22.8 C (-9.0 F)
1892	-22.2 C (-8.0 F)
1893	-26.1 C (-15.0 F)
1894	-28.3 C (-18.9 F)
1895	-26.1 C (-15.0 F)
1896	-29.4 C (-20.9 F)
1897	-23.9 C (-11.0 F)
1898	-35.6 C (-32.1 F)
1899	-27.8 C (-18.0 F)
1900	-26.7 C (-16.1 F)
1901	-30.6 C (-23.1 F)
1902	-26.1 C (-15.0 F)
1903	-31.1 C (-24.0 F)
1904	-33.9 C (-29.0 F)
1905	-26.1 C (-15.0 F)
1906	-23.9 C (-11.0 F)
1907	-24.4 C (-11.9 F)
1908	-23.9 C (-11.0 F)
1909	-25.6 C (-14.1 F)
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1925	n/a
1933	0.6 C (33.1 F)
1934	-28.9 C (-20.0 F)
1939	2.8 C (37.0 F)

Wettest day (Rx1day)

The wettest day of the year at Concord River, 1884 to 1939. The record is 129.8 mm (5.1 in) in 1887, marked on the chart; the median year is 57.7 mm (2.3 in).

Wettest day (Rx1day) at Concord River by year
Year	Wettest day (Rx1day)
1884	31.8 mm (1.3 in)
1885	69.9 mm (2.8 in)
1886	70.4 mm (2.8 in)
1887	129.8 mm (5.1 in)
1888	85.3 mm (3.4 in)
1889	51.6 mm (2.0 in)
1890	61.5 mm (2.4 in)
1891	35.6 mm (1.4 in)
1892	78.7 mm (3.1 in)
1893	41.9 mm (1.6 in)
1894	32.3 mm (1.3 in)
1895	64.8 mm (2.6 in)
1896	55.6 mm (2.2 in)
1897	122.4 mm (4.8 in)
1898	74.9 mm (2.9 in)
1899	46.2 mm (1.8 in)
1900	49.3 mm (1.9 in)
1901	84.3 mm (3.3 in)
1902	61.2 mm (2.4 in)
1903	74.4 mm (2.9 in)
1904	70.1 mm (2.8 in)
1905	57.7 mm (2.3 in)
1906	62.0 mm (2.4 in)
1907	83.1 mm (3.3 in)
1908	84.3 mm (3.3 in)
1909	34.0 mm (1.3 in)
1910	27.4 mm (1.1 in)
1911	21.6 mm (0.9 in)
1912	34.3 mm (1.4 in)
1913	28.4 mm (1.1 in)
1914	38.1 mm (1.5 in)
1915	39.1 mm (1.5 in)
1916	72.9 mm (2.9 in)
1917	33.8 mm (1.3 in)
1918	76.7 mm (3.0 in)
1919	60.7 mm (2.4 in)
1920	41.9 mm (1.6 in)
1925	74.9 mm (2.9 in)
1933	27.7 mm (1.1 in)
1934	46.0 mm (1.8 in)
1939	10.2 mm (0.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Concord River, 1884 to 1939. The record is 148.4 mm (5.8 in) in 1897, marked on the chart; the median year is 64.0 mm (2.5 in).

Wettest five days (Rx5day) at Concord River by year
Year	Wettest five days (Rx5day)
1884	n/a
1885	78.6 mm (3.1 in)
1886	73.0 mm (2.9 in)
1887	64.0 mm (2.5 in)
1888	72.7 mm (2.9 in)
1889	72.5 mm (2.9 in)
1890	69.1 mm (2.7 in)
1891	45.2 mm (1.8 in)
1892	54.9 mm (2.2 in)
1893	58.2 mm (2.3 in)
1894	37.6 mm (1.5 in)
1895	43.2 mm (1.7 in)
1896	85.3 mm (3.4 in)
1897	148.4 mm (5.8 in)
1898	47.2 mm (1.9 in)
1899	20.3 mm (0.8 in)
1900	62.2 mm (2.4 in)
1901	126.0 mm (5.0 in)
1902	79.5 mm (3.1 in)
1903	101.0 mm (4.0 in)
1904	103.6 mm (4.1 in)
1905	81.5 mm (3.2 in)
1906	103.7 mm (4.1 in)
1907	94.5 mm (3.7 in)
1908	93.7 mm (3.7 in)
1909	65.1 mm (2.6 in)
1910	56.8 mm (2.2 in)
1911	42.2 mm (1.7 in)
1912	45.7 mm (1.8 in)
1913	46.2 mm (1.8 in)
1914	45.7 mm (1.8 in)
1915	46.2 mm (1.8 in)
1916	77.2 mm (3.0 in)
1917	41.7 mm (1.6 in)
1918	81.0 mm (3.2 in)
1919	61.5 mm (2.4 in)
1920	42.7 mm (1.7 in)
1925	n/a
1933	65.8 mm (2.6 in)
1934	58.3 mm (2.3 in)
1939	20.7 mm (0.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Concord River, 1884 to 1939. The record is 34 days in 1908, marked on the chart; the median year is 16 days.

Longest dry spell (CDD) at Concord River by year
Year	Longest dry spell (CDD)
1884	1 day
1885	13 days
1886	16 days
1887	19 days
1888	10 days
1889	23 days
1890	5 days
1891	12 days
1892	11 days
1893	10 days
1894	21 days
1895	12 days
1896	9 days
1897	10 days
1898	3 days
1899	3 days
1900	18 days
1901	26 days
1902	13 days
1903	17 days
1904	20 days
1905	22 days
1906	16 days
1907	14 days
1908	34 days
1909	14 days
1910	18 days
1911	18 days
1912	21 days
1913	20 days
1914	29 days
1915	34 days
1916	18 days
1917	23 days
1918	25 days
1919	10 days
1920	12 days
1925	n/a
1933	3 days
1934	16 days
1939	13 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

25 years with a frost

Across 25 years with a frost, the median last spring frost at Concord River falls on 4 May and the median first autumn frost on 26 September, which leaves a median of 149 days between them.

Fitted over all years, the growing season changes by -8.7 days per decade at this station.

Frost dates and growing season at Concord River
Measure	Median, all years	Earliest period	Recent period (1885 to 1909)	Recent against earliest	Fitted trend
Last spring frost	4 May	n/a	4 May	n/a	+6.1 days per decade
First autumn frost	26 September	n/a	26 September	n/a	-2.5 days per decade
Growing days	149 days	n/a	149 days	n/a	-8.7 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Download the Data

Data for Concord River standing records by year: CSV or JSON. Field meanings are on the data page.
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).