Hartford Weather Records (USC00063446)

Record envelope, standing records and threshold days for Hartford (USC00063446), Connecticut, United States, with 59 years of record.

Key Facts for Hartford

Hartford (USC00063446) is a weather station in Connecticut, United States at 41.77 latitude and -72.70 longitude, 43 m (141 ft) above sea level.
The station reports from 1893 to 1951, 59 years of record.
1,464 records set at Hartford still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Connecticut, United States, 41.77 latitude, -72.70 longitude.
Elevation: 43 m (141 ft).
Period of record: 1893 to 1951, 59 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 Hartford. 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 Hartford, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	11.1 C (52.0 F)	-28.9 C (-20.0 F)	n/a	n/a
Feb	13.3 C (55.9 F)	-23.9 C (-11.0 F)	n/a	n/a
Mar	21.7 C (71.1 F)	-14.4 C (6.1 F)	n/a	n/a
Apr	30.0 C (86.0 F)	-5.6 C (21.9 F)	n/a	n/a
May	33.3 C (91.9 F)	0.0 C (32.0 F)	n/a	n/a
Jun	35.6 C (96.1 F)	6.7 C (44.1 F)	n/a	n/a
Jul	36.7 C (98.1 F)	10.0 C (50.0 F)	n/a	n/a
Aug	33.9 C (93.0 F)	8.9 C (48.0 F)	n/a	n/a
Sep	32.8 C (91.0 F)	0.0 C (32.0 F)	n/a	n/a
Oct	28.9 C (84.0 F)	-3.9 C (25.0 F)	n/a	n/a
Nov	21.1 C (70.0 F)	-12.2 C (10.0 F)	n/a	n/a
Dec	15.6 C (60.1 F)	-22.2 C (-8.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Hartford still stand. 1896 holds the most, with 176.

Wettest Day of Each Month

Jul: 165.1 mm (6.5 in)

The wettest day on record for each calendar month at Hartford. The most was 165.1 mm (6.5 in) on 13 July 1897.

Record daily precipitation for each month at Hartford
Month	Record daily precipitation (mm)	Date
Jan	32.5 mm (1.3 in)	20 January 1898
Feb	98.6 mm (3.9 in)	13 February 1900
Mar	86.1 mm (3.4 in)	1 March 1900
Apr	76.7 mm (3.0 in)	7 April 1901
May	87.6 mm (3.4 in)	19 May 1900
Jun	110.0 mm (4.3 in)	21 June 1903
Jul	165.1 mm (6.5 in)	13 July 1897
Aug	88.9 mm (3.5 in)	11 August 1902
Sep	86.4 mm (3.4 in)	15 September 1904
Oct	88.1 mm (3.5 in)	28 October 1902
Nov	79.8 mm (3.1 in)	26 November 1900
Dec	53.1 mm (2.1 in)	14 December 1897

Period of Record Coverage

1893 to 1904

12 years of record at Hartford, 1893 to 1904. 2 years have data for under 90 percent of days and are left out of rankings: 1893, 1903.

Days with data per year at Hartford
Year	Days with data	Share of year	Complete
1893	288	79%	No
1894	347	95%	Yes
1895	335	92%	Yes
1896	337	92%	Yes
1897	329	90%	Yes
1898	341	93%	Yes
1899	348	95%	Yes
1900	351	96%	Yes
1901	347	95%	Yes
1902	349	96%	Yes
1903	324	89%	No
1904	334	91%	Yes

Latest Records

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

Climate Trend

11 complete years, 1894 to 1904

One stripe for each of 11 complete years at Hartford, 1894 to 1904. Blue stripes are years cooler than the station's own mean of 9.4 C (48.9 F); red stripes are warmer. The coolest year was 1904, at 7.5 C (45.5 F), and the warmest was 1900, at 10.2 C (50.3 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at Hartford as warming stripes, 1894 to 1904
Year	Annual mean temperature	Difference from the station mean
1894	9.9 C	+0.44 C
1895	9.4 C	0.00 C
1896	9.7 C	+0.27 C
1897	9.7 C	+0.31 C
1898	10.0 C	+0.58 C
1899	9.6 C	+0.17 C
1900	10.2 C	+0.75 C
1901	9.1 C	-0.28 C
1902	9.4 C	-0.06 C
1903	9.1 C	-0.27 C
1904	7.5 C	-1.90 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 1951

Yearly extremes at Hartford: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.7 C (98.1 F)	1901	34.4 C (93.9 F)	12
Coldest night (TNn)	-28.9 C (-20.0 F)	1904	-20.8 C (-5.5 F)	12
Wettest day (Rx1day)	165.1 mm (6.5 in)	1897	81.7 mm (3.2 in)	12
Wettest five days (Rx5day)	240.3 mm (9.5 in)	1897	99.3 mm (3.9 in)	12
Longest dry spell (CDD)	35 days	1948	19 days	12

Hottest day (TXx)

The hottest day of the year at Hartford, 1893 to 1951. The record is 36.7 C (98.1 F) in 1901, marked on the chart; the median year is 34.4 C (93.9 F).

Hottest day (TXx) at Hartford by year
Year	Hottest day (TXx)
1893	34.4 C (93.9 F)
1894	35.0 C (95.0 F)
1895	34.4 C (93.9 F)
1896	33.3 C (91.9 F)
1897	32.2 C (90.0 F)
1898	36.1 C (97.0 F)
1899	34.4 C (93.9 F)
1900	35.0 C (95.0 F)
1901	36.7 C (98.1 F)
1902	32.2 C (90.0 F)
1903	33.3 C (91.9 F)
1904	33.3 C (91.9 F)
1948	n/a
1949	n/a
1950	n/a
1951	n/a

Coldest night (TNn)

The coldest night of the year at Hartford, 1893 to 1951. The record is -28.9 C (-20.0 F) in 1904, marked on the chart; the median year is -20.8 C (-5.5 F).

Coldest night (TNn) at Hartford by year
Year	Coldest night (TNn)
1893	-17.8 C (0.0 F)
1894	-21.7 C (-7.1 F)
1895	-22.2 C (-8.0 F)
1896	-23.9 C (-11.0 F)
1897	-18.9 C (-2.0 F)
1898	-20.0 C (-4.0 F)
1899	-23.3 C (-9.9 F)
1900	-20.0 C (-4.0 F)
1901	-18.9 C (-2.0 F)
1902	-22.2 C (-8.0 F)
1903	-18.9 C (-2.0 F)
1904	-28.9 C (-20.0 F)
1948	n/a
1949	n/a
1950	n/a
1951	n/a

Wettest day (Rx1day)

The wettest day of the year at Hartford, 1893 to 1951. The record is 165.1 mm (6.5 in) in 1897, marked on the chart; the median year is 81.7 mm (3.2 in).

Wettest day (Rx1day) at Hartford by year
Year	Wettest day (Rx1day)
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	165.1 mm (6.5 in)
1898	77.0 mm (3.0 in)
1899	94.2 mm (3.7 in)
1900	98.6 mm (3.9 in)
1901	76.7 mm (3.0 in)
1902	88.9 mm (3.5 in)
1903	110.0 mm (4.3 in)
1904	86.4 mm (3.4 in)
1948	53.3 mm (2.1 in)
1949	40.6 mm (1.6 in)
1950	68.6 mm (2.7 in)
1951	55.9 mm (2.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Hartford, 1893 to 1951. The record is 240.3 mm (9.5 in) in 1897, marked on the chart; the median year is 99.3 mm (3.9 in).

Wettest five days (Rx5day) at Hartford by year
Year	Wettest five days (Rx5day)
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	240.3 mm (9.5 in)
1898	97.0 mm (3.8 in)
1899	103.6 mm (4.1 in)
1900	119.6 mm (4.7 in)
1901	134.6 mm (5.3 in)
1902	99.4 mm (3.9 in)
1903	116.2 mm (4.6 in)
1904	97.8 mm (3.9 in)
1948	96.8 mm (3.8 in)
1949	88.9 mm (3.5 in)
1950	82.6 mm (3.3 in)
1951	99.1 mm (3.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Hartford, 1893 to 1951. The record is 35 days in 1948, marked on the chart; the median year is 19 days.

Longest dry spell (CDD) at Hartford by year
Year	Longest dry spell (CDD)
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	15 days
1898	17 days
1899	16 days
1900	19 days
1901	25 days
1902	25 days
1903	17 days
1904	18 days
1948	35 days
1949	19 days
1950	25 days
1951	10 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 Hartford standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hartford 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). Records are computed by this site and are not official.

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