Harriman Weather Records (USC00403907)

Record envelope, standing records and threshold days for Harriman (USC00403907), Tennessee, United States, with 70 years of record.

Key Facts for Harriman

Harriman (USC00403907) is a weather station in Tennessee, United States at 35.93 latitude and -84.55 longitude, 235 m (771 ft) above sea level.
The station reports from 1893 to 1962, 70 years of record.
1,464 records set at Harriman still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Harriman set a daily record precipitation of 50.8 mm (2.0 in) on 21 March 1962.

About the Station

Location: Tennessee, United States, 35.93 latitude, -84.55 longitude.
Elevation: 235 m (771 ft).
Period of record: 1893 to 1962, 70 years.
Eligible elements: prcp.

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 Harriman. 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 Harriman, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	23.9 C (75.0 F)	-20.0 C (-4.0 F)	n/a	n/a
Feb	24.4 C (75.9 F)	-24.4 C (-11.9 F)	n/a	n/a
Mar	30.0 C (86.0 F)	-16.1 C (3.0 F)	n/a	n/a
Apr	33.9 C (93.0 F)	-3.9 C (25.0 F)	n/a	n/a
May	36.7 C (98.1 F)	-0.6 C (30.9 F)	n/a	n/a
Jun	38.9 C (102.0 F)	6.1 C (43.0 F)	n/a	n/a
Jul	38.9 C (102.0 F)	10.6 C (51.1 F)	n/a	n/a
Aug	40.0 C (104.0 F)	10.0 C (50.0 F)	n/a	n/a
Sep	36.7 C (98.1 F)	2.2 C (36.0 F)	n/a	n/a
Oct	32.8 C (91.0 F)	-6.1 C (21.0 F)	n/a	n/a
Nov	28.3 C (82.9 F)	-10.6 C (12.9 F)	n/a	n/a
Dec	21.1 C (70.0 F)	-17.8 C (0.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Harriman still stand. 1911 holds the most, with 132.

Standing records at Harriman by the year they were set
Year set	Standing records
1893	77
1894	42
1895	62
1896	63
1897	100
1898	97
1899	106
1900	87
1901	101
1902	59
1903	69
1904	53
1905	64
1906	48
1907	72
1908	81
1909	76
1910	75
1911	132

Wettest Day of Each Month

Feb: 114.3 mm (4.5 in)

The wettest day on record for each calendar month at Harriman. The most was 114.3 mm (4.5 in) on 28 February 1903.

Record daily precipitation for each month at Harriman
Month	Record daily precipitation (mm)	Date
Jan	102.9 mm (4.1 in)	2 January 1911
Feb	114.3 mm (4.5 in)	28 February 1903
Mar	97.0 mm (3.8 in)	11 March 1952
Apr	108.2 mm (4.3 in)	4 April 1897
May	71.1 mm (2.8 in)	21 May 1901
Jun	69.9 mm (2.8 in)	17 June 1960
Jul	101.6 mm (4.0 in)	3 July 1908
Aug	101.6 mm (4.0 in)	15 August 1901
Sep	79.2 mm (3.1 in)	14 September 1900
Oct	101.1 mm (4.0 in)	10 October 1911
Nov	100.1 mm (3.9 in)	28 November 1948
Dec	95.0 mm (3.7 in)	29 December 1954

Period of Record Coverage

1893 to 1911

19 years of record at Harriman, 1893 to 1911. 9 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1895, 1896, 1902, 1903, 1904, 1906 and others.

Days with data per year at Harriman
Year	Days with data	Share of year	Complete
1893	199	55%	No
1894	90	25%	No
1895	180	49%	No
1896	176	48%	No
1897	364	100%	Yes
1898	363	99%	Yes
1899	360	99%	Yes
1900	353	97%	Yes
1901	338	93%	Yes
1902	324	89%	No
1903	291	80%	No
1904	303	83%	No
1905	352	96%	Yes
1906	247	68%	No
1907	287	79%	No
1908	362	99%	Yes
1909	363	99%	Yes
1910	364	100%	Yes
1911	361	99%	Yes

Latest Records

Latest records at Harriman
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 March 1962	Harriman, US	daily rain	50.8 mm (2.0 in)	5.1 mm (0.20 in)	57 years	27 of 100 (Routine)

Climate Trend

10 complete years, 1897 to 1911

One stripe for each of 10 complete years at Harriman, 1897 to 1911. Blue stripes are years cooler than the station's own mean of 14.6 C (58.4 F); red stripes are warmer. The coolest year was 1901, at 13.1 C (55.6 F), and the warmest was 1911, at 16.5 C (61.6 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Harriman as warming stripes, 1897 to 1911
Year	Annual mean temperature	Difference from the station mean
1897	14.5 C	-0.16 C
1898	14.7 C	+0.06 C
1899	14.2 C	-0.42 C
1900	14.9 C	+0.24 C
1901	13.1 C	-1.52 C
1905	14.1 C	-0.53 C
1908	15.4 C	+0.76 C
1909	14.8 C	+0.13 C
1910	14.3 C	-0.38 C
1911	16.5 C	+1.81 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

1893 to 1962

Yearly extremes at Harriman: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.0 C (104.0 F)	1894	36.7 C (98.1 F)	19
Coldest night (TNn)	-24.4 C (-11.9 F)	1895	-15.0 C (5.0 F)	19
Wettest day (Rx1day)	114.3 mm (4.5 in)	1903	71.5 mm (2.8 in)	34
Wettest five days (Rx5day)	230.8 mm (9.1 in)	1908	121.5 mm (4.8 in)	34
Longest dry spell (CDD)	38 days	1903	19 days	34

Hottest day (TXx)

The hottest day of the year at Harriman, 1893 to 1962. The record is 40.0 C (104.0 F) in 1894, marked on the chart; the median year is 36.7 C (98.1 F).

Hottest day (TXx) at Harriman by year
Year	Hottest day (TXx)
1893	38.9 C (102.0 F)
1894	40.0 C (104.0 F)
1895	31.7 C (89.1 F)
1896	33.9 C (93.0 F)
1897	35.6 C (96.1 F)
1898	36.7 C (98.1 F)
1899	37.8 C (100.0 F)
1900	36.7 C (98.1 F)
1901	37.2 C (99.0 F)
1902	36.7 C (98.1 F)
1903	34.4 C (93.9 F)
1904	34.4 C (93.9 F)
1905	33.3 C (91.9 F)
1906	34.4 C (93.9 F)
1907	36.7 C (98.1 F)
1908	36.7 C (98.1 F)
1909	36.1 C (97.0 F)
1910	34.4 C (93.9 F)
1911	38.9 C (102.0 F)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a

Coldest night (TNn)

The coldest night of the year at Harriman, 1893 to 1962. The record is -24.4 C (-11.9 F) in 1895, marked on the chart; the median year is -15.0 C (5.0 F).

Coldest night (TNn) at Harriman by year
Year	Coldest night (TNn)
1893	-10.6 C (12.9 F)
1894	-17.8 C (0.0 F)
1895	-24.4 C (-11.9 F)
1896	-17.8 C (0.0 F)
1897	-20.0 C (-4.0 F)
1898	-13.3 C (8.1 F)
1899	-24.4 C (-11.9 F)
1900	-15.0 C (5.0 F)
1901	-17.8 C (0.0 F)
1902	-12.8 C (9.0 F)
1903	-15.0 C (5.0 F)
1904	-13.3 C (8.1 F)
1905	-19.4 C (-2.9 F)
1906	-11.1 C (12.0 F)
1907	-10.0 C (14.0 F)
1908	-12.2 C (10.0 F)
1909	-15.0 C (5.0 F)
1910	-11.7 C (10.9 F)
1911	-13.3 C (8.1 F)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a

Wettest day (Rx1day)

The wettest day of the year at Harriman, 1893 to 1962. The record is 114.3 mm (4.5 in) in 1903, marked on the chart; the median year is 71.5 mm (2.8 in).

Wettest day (Rx1day) at Harriman by year
Year	Wettest day (Rx1day)
1893	55.6 mm (2.2 in)
1894	49.3 mm (1.9 in)
1895	45.7 mm (1.8 in)
1896	84.8 mm (3.3 in)
1897	108.2 mm (4.3 in)
1898	64.3 mm (2.5 in)
1899	68.6 mm (2.7 in)
1900	79.2 mm (3.1 in)
1901	101.6 mm (4.0 in)
1902	95.3 mm (3.8 in)
1903	114.3 mm (4.5 in)
1904	63.5 mm (2.5 in)
1905	71.1 mm (2.8 in)
1906	66.0 mm (2.6 in)
1907	66.0 mm (2.6 in)
1908	101.6 mm (4.0 in)
1909	73.2 mm (2.9 in)
1910	73.4 mm (2.9 in)
1911	102.9 mm (4.1 in)
1948	100.1 mm (3.9 in)
1949	64.5 mm (2.5 in)
1950	70.1 mm (2.8 in)
1951	87.1 mm (3.4 in)
1952	97.0 mm (3.8 in)
1953	78.7 mm (3.1 in)
1954	95.0 mm (3.7 in)
1955	71.9 mm (2.8 in)
1956	67.3 mm (2.6 in)
1957	68.6 mm (2.7 in)
1958	58.9 mm (2.3 in)
1959	92.2 mm (3.6 in)
1960	69.9 mm (2.8 in)
1961	64.5 mm (2.5 in)
1962	57.2 mm (2.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Harriman, 1893 to 1962. The record is 230.8 mm (9.1 in) in 1908, marked on the chart; the median year is 121.5 mm (4.8 in).

Wettest five days (Rx5day) at Harriman by year
Year	Wettest five days (Rx5day)
1893	75.4 mm (3.0 in)
1894	95.8 mm (3.8 in)
1895	99.1 mm (3.9 in)
1896	96.5 mm (3.8 in)
1897	168.4 mm (6.6 in)
1898	122.0 mm (4.8 in)
1899	108.0 mm (4.3 in)
1900	94.4 mm (3.7 in)
1901	226.5 mm (8.9 in)
1902	130.9 mm (5.2 in)
1903	149.8 mm (5.9 in)
1904	102.9 mm (4.1 in)
1905	107.1 mm (4.2 in)
1906	106.5 mm (4.2 in)
1907	82.5 mm (3.2 in)
1908	230.8 mm (9.1 in)
1909	108.5 mm (4.3 in)
1910	95.5 mm (3.8 in)
1911	185.0 mm (7.3 in)
1948	130.0 mm (5.1 in)
1949	124.9 mm (4.9 in)
1950	157.5 mm (6.2 in)
1951	159.3 mm (6.3 in)
1952	97.0 mm (3.8 in)
1953	113.7 mm (4.5 in)
1954	137.2 mm (5.4 in)
1955	142.5 mm (5.6 in)
1956	160.1 mm (6.3 in)
1957	188.8 mm (7.4 in)
1958	78.3 mm (3.1 in)
1959	135.9 mm (5.4 in)
1960	99.4 mm (3.9 in)
1961	153.4 mm (6.0 in)
1962	120.9 mm (4.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Harriman, 1893 to 1962. The record is 38 days in 1903, marked on the chart; the median year is 19 days.

Longest dry spell (CDD) at Harriman by year
Year	Longest dry spell (CDD)
1893	25 days
1894	17 days
1895	16 days
1896	16 days
1897	22 days
1898	15 days
1899	19 days
1900	15 days
1901	22 days
1902	22 days
1903	38 days
1904	22 days
1905	18 days
1906	22 days
1907	21 days
1908	32 days
1909	18 days
1910	22 days
1911	24 days
1948	11 days
1949	11 days
1950	16 days
1951	12 days
1952	30 days
1953	30 days
1954	24 days
1955	17 days
1956	19 days
1957	16 days
1958	13 days
1959	25 days
1960	12 days
1961	18 days
1962	8 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.

Download the Data

Data for Harriman standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Harriman 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). Records are computed by this site and are not official.

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