West Hartford Nepp Weather Records (USC00069162)

Record envelope, standing records and threshold days for West Hartford Nepp (USC00069162), Connecticut, United States, with 55 years of record.

Key Facts for West Hartford Nepp

West Hartford Nepp (USC00069162) is a weather station in Connecticut, United States at 41.81 latitude and -72.78 longitude, 110 m (360 ft) above sea level.
The station reports from 1948 to 2002, 55 years of record.
0 records set at West Hartford Nepp still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
West Hartford Nepp set a daily record precipitation of 48.0 mm (1.9 in) on 17 November 2002.

About the Station

Location: Connecticut, United States, 41.81 latitude, -72.78 longitude.
Elevation: 110 m (360 ft).
Period of record: 1948 to 2002, 55 years.
Eligible elements: prcp, snow, snwd.

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 West Hartford Nepp. 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 West Hartford Nepp, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

0 standing records

0 records at West Hartford Nepp still stand.

All-Time Record Progression

1 new records

1 all-time records were set at West Hartford Nepp between 17 September 1999 and 17 September 1999. Each dot is a new record.

Wettest Day of Each Month

Sep: 265.7 mm (10.5 in)

The wettest day on record for each calendar month at West Hartford Nepp. The most was 265.7 mm (10.5 in) on 17 September 1999.

Record daily precipitation for each month at West Hartford Nepp
Month	Record daily precipitation (mm)	Date
Jan	82.3 mm (3.2 in)	25 January 1979
Feb	68.1 mm (2.7 in)	21 February 1981
Mar	125.2 mm (4.9 in)	22 March 1980
Apr	98.0 mm (3.9 in)	10 April 1980
May	93.7 mm (3.7 in)	23 May 1989
Jun	215.4 mm (8.5 in)	6 June 1992
Jul	99.1 mm (3.9 in)	24 July 1988
Aug	258.1 mm (10.2 in)	19 August 1955
Sep	265.7 mm (10.5 in)	17 September 1999
Oct	124.0 mm (4.9 in)	20 October 1996
Nov	102.9 mm (4.1 in)	23 November 1952
Dec	72.9 mm (2.9 in)	4 December 1990

Latest Records

Latest records at West Hartford Nepp
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 November 2002	West Hartford Nepp, US	daily rain	48.0 mm (1.9 in)	2.3 mm (0.09 in)	16 years	11 of 100 (Routine)
27 October 2002	West Hartford Nepp, US	daily rain	22.6 mm (0.9 in)	9.9 mm (0.39 in)	24 years	16 of 100 (Routine)
16 October 2002	West Hartford Nepp, US	daily rain	31.8 mm (1.3 in)	6.9 mm (0.27 in)	32 years	17 of 100 (Routine)
11 October 2002	West Hartford Nepp, US	daily rain	72.4 mm (2.9 in)	12.2 mm (0.5 in)	31 years	20 of 100 (Routine)
30 August 2002	West Hartford Nepp, US	daily rain	48.5 mm (1.9 in)	19.5 mm (0.8 in)	27 years	22 of 100 (Routine)
20 July 2002	West Hartford Nepp, US	daily rain	59.2 mm (2.3 in)	23.6 mm (0.9 in)	13 years	25 of 100 (Routine)
19 July 2002	West Hartford Nepp, US	daily rain	59.2 mm (2.3 in)	30.5 mm (1.2 in)	8 years	27 of 100 (Routine)
16 June 2002	West Hartford Nepp, US	daily rain	94.0 mm (3.7 in)	66.3 mm (2.6 in)	12 years	44 of 100 (Notable)
21 September 2001	West Hartford Nepp, US	daily rain	61.0 mm (2.4 in)	29.2 mm (1.1 in)	40 years	31 of 100 (Routine)
17 June 2001	West Hartford Nepp, US	daily rain	94.0 mm (3.7 in)	65.0 mm (2.6 in)	51 years	56 of 100 (Notable)
11 June 2001	West Hartford Nepp, US	daily rain	19.1 mm (0.8 in)	3.6 mm (0.14 in)	44 years	19 of 100 (Routine)
25 May 2001	West Hartford Nepp, US	daily rain	58.4 mm (2.3 in)	5.1 mm (0.20 in)	23 years	14 of 100 (Routine)
21 March 2001	West Hartford Nepp, US	daily rain	57.9 mm (2.3 in)	47.7 mm (1.9 in)	11 years	42 of 100 (Notable)
20 September 2000	West Hartford Nepp, US	daily rain	72.9 mm (2.9 in)	12.4 mm (0.5 in)	40 years	22 of 100 (Routine)
10 September 2000	West Hartford Nepp, US	daily rain	12.7 mm (0.5 in)	1.3 mm (0.05 in)	1 year	5 of 100 (Routine)
21 August 2000	West Hartford Nepp, US	monthly snowfall	0.5 cm (0.2 in)	0.5 cm (0.2 in)	52 years	20 of 100 (Routine)
27 July 2000	West Hartford Nepp, US	daily rain	63.8 mm (2.5 in)	40.2 mm (1.6 in)	7 years	34 of 100 (Routine)
12 June 2000	West Hartford Nepp, US	daily rain	49.0 mm (1.9 in)	10.9 mm (0.4 in)	37 years	22 of 100 (Routine)
8 June 2000	West Hartford Nepp, US	daily rain	106.7 mm (4.2 in)	77.7 mm (3.1 in)	11 years	48 of 100 (Notable)
22 April 2000	West Hartford Nepp, US	daily rain	86.1 mm (3.4 in)	76.2 mm (3.0 in)	14 years	49 of 100 (Notable)

Extremes by Year

1948 to 2002

Yearly extremes at West Hartford Nepp: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	265.7 mm (10.5 in)	1999	72.4 mm (2.9 in)	55
Wettest five days (Rx5day)	302.1 mm (11.9 in)	1955	120.5 mm (4.7 in)	55
Longest dry spell (CDD)	37 days	1952	17 days	55

Wettest day (Rx1day)

The wettest day of the year at West Hartford Nepp, 1948 to 2002. The record is 265.7 mm (10.5 in) in 1999, marked on the chart; the median year is 72.4 mm (2.9 in).

Wettest day (Rx1day) at West Hartford Nepp by year
Year	Wettest day (Rx1day)
1948	70.6 mm (2.8 in)
1949	48.0 mm (1.9 in)
1950	72.4 mm (2.9 in)
1951	62.0 mm (2.4 in)
1952	102.9 mm (4.1 in)
1953	59.7 mm (2.4 in)
1954	64.5 mm (2.5 in)
1955	258.1 mm (10.2 in)
1956	50.3 mm (2.0 in)
1957	42.4 mm (1.7 in)
1958	63.5 mm (2.5 in)
1959	85.1 mm (3.4 in)
1960	74.2 mm (2.9 in)
1961	45.7 mm (1.8 in)
1962	55.1 mm (2.2 in)
1963	51.1 mm (2.0 in)
1964	38.9 mm (1.5 in)
1965	42.7 mm (1.7 in)
1966	65.0 mm (2.6 in)
1967	52.3 mm (2.1 in)
1968	65.8 mm (2.6 in)
1969	57.2 mm (2.3 in)
1970	54.1 mm (2.1 in)
1971	74.9 mm (2.9 in)
1972	57.2 mm (2.3 in)
1973	73.7 mm (2.9 in)
1974	64.5 mm (2.5 in)
1975	63.2 mm (2.5 in)
1976	73.9 mm (2.9 in)
1977	71.1 mm (2.8 in)
1978	74.7 mm (2.9 in)
1979	121.2 mm (4.8 in)
1980	125.2 mm (4.9 in)
1981	68.1 mm (2.7 in)
1982	173.2 mm (6.8 in)
1983	90.9 mm (3.6 in)
1984	65.8 mm (2.6 in)
1985	72.4 mm (2.9 in)
1986	69.1 mm (2.7 in)
1987	98.0 mm (3.9 in)
1988	99.1 mm (3.9 in)
1989	118.9 mm (4.7 in)
1990	109.7 mm (4.3 in)
1991	102.9 mm (4.1 in)
1992	215.4 mm (8.5 in)
1993	73.7 mm (2.9 in)
1994	107.4 mm (4.2 in)
1995	111.8 mm (4.4 in)
1996	124.0 mm (4.9 in)
1997	77.7 mm (3.1 in)
1998	67.1 mm (2.6 in)
1999	265.7 mm (10.5 in)
2000	106.7 mm (4.2 in)
2001	94.0 mm (3.7 in)
2002	94.0 mm (3.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at West Hartford Nepp, 1948 to 2002. The record is 302.1 mm (11.9 in) in 1955, marked on the chart; the median year is 120.5 mm (4.7 in).

Wettest five days (Rx5day) at West Hartford Nepp by year
Year	Wettest five days (Rx5day)
1948	85.3 mm (3.4 in)
1949	118.1 mm (4.6 in)
1950	89.0 mm (3.5 in)
1951	78.0 mm (3.1 in)
1952	131.3 mm (5.2 in)
1953	132.3 mm (5.2 in)
1954	122.9 mm (4.8 in)
1955	302.1 mm (11.9 in)
1956	75.3 mm (3.0 in)
1957	81.5 mm (3.2 in)
1958	95.8 mm (3.8 in)
1959	127.3 mm (5.0 in)
1960	121.4 mm (4.8 in)
1961	115.0 mm (4.5 in)
1962	78.0 mm (3.1 in)
1963	89.9 mm (3.5 in)
1964	53.0 mm (2.1 in)
1965	56.1 mm (2.2 in)
1966	74.7 mm (2.9 in)
1967	76.0 mm (3.0 in)
1968	83.8 mm (3.3 in)
1969	85.1 mm (3.4 in)
1970	96.0 mm (3.8 in)
1971	105.7 mm (4.2 in)
1972	119.9 mm (4.7 in)
1973	88.7 mm (3.5 in)
1974	68.5 mm (2.7 in)
1975	192.5 mm (7.6 in)
1976	114.1 mm (4.5 in)
1977	129.4 mm (5.1 in)
1978	102.9 mm (4.1 in)
1979	203.0 mm (8.0 in)
1980	149.0 mm (5.9 in)
1981	164.4 mm (6.5 in)
1982	265.9 mm (10.5 in)
1983	122.7 mm (4.8 in)
1984	238.1 mm (9.4 in)
1985	92.2 mm (3.6 in)
1986	98.4 mm (3.9 in)
1987	155.5 mm (6.1 in)
1988	190.1 mm (7.5 in)
1989	235.2 mm (9.3 in)
1990	112.2 mm (4.4 in)
1991	177.1 mm (7.0 in)
1992	216.4 mm (8.5 in)
1993	120.5 mm (4.7 in)
1994	241.8 mm (9.5 in)
1995	132.4 mm (5.2 in)
1996	142.8 mm (5.6 in)
1997	186.3 mm (7.3 in)
1998	112.8 mm (4.4 in)
1999	289.6 mm (11.4 in)
2000	155.7 mm (6.1 in)
2001	139.2 mm (5.5 in)
2002	133.9 mm (5.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at West Hartford Nepp, 1948 to 2002. The record is 37 days in 1952, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at West Hartford Nepp by year
Year	Longest dry spell (CDD)
1948	27 days
1949	19 days
1950	16 days
1951	12 days
1952	37 days
1953	23 days
1954	13 days
1955	17 days
1956	22 days
1957	16 days
1958	20 days
1959	13 days
1960	18 days
1961	22 days
1962	14 days
1963	24 days
1964	17 days
1965	16 days
1966	20 days
1967	16 days
1968	26 days
1969	21 days
1970	17 days
1971	18 days
1972	14 days
1973	27 days
1974	13 days
1975	15 days
1976	17 days
1977	15 days
1978	19 days
1979	11 days
1980	23 days
1981	25 days
1982	16 days
1983	15 days
1984	20 days
1985	19 days
1986	16 days
1987	13 days
1988	22 days
1989	15 days
1990	16 days
1991	25 days
1992	17 days
1993	17 days
1994	13 days
1995	11 days
1996	12 days
1997	15 days
1998	13 days
1999	17 days
2000	21 days
2001	20 days
2002	15 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.

Rainfall Return Levels

43 years, 1949 to 1999

A day with at least 69.7 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 243.1 mm (9.6 in) of rain is expected about once in 100 years.

Rainfall return levels at West Hartford Nepp: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	69.7 mm (2.7 in)
5 years	97.9 mm (3.9 in)
10 years	122.3 mm (4.8 in)
25 years	161.6 mm (6.4 in)
50 years	198.4 mm (7.8 in)	Longer than the 43 years of record
100 years	243.1 mm (9.6 in)	Longer than the 43 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 43 years of values from 1949 to 1999.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 265.7 mm (10.5 in) in 1999; 173.2 mm (6.8 in) in 1982; 125.2 mm (4.9 in) in 1980.

Download the Data

Data for West Hartford Nepp standing records by year: CSV or JSON. Field meanings are on the data page.
Data for West Hartford Nepp 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 2026-10-13 (13 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).

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a