South Lyndeboro Weather Records (USC00278081)

Record envelope, standing records and threshold days for South Lyndeboro (USC00278081), New Hampshire, United States, with 56 years of record.

Key Facts for South Lyndeboro

South Lyndeboro (USC00278081) is a weather station in New Hampshire, United States at 42.88 latitude and -71.78 longitude, 198 m (650 ft) above sea level.
The station reports from 1944 to 1999, 56 years of record.
32 records set at South Lyndeboro still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
South Lyndeboro set a daily record precipitation of 45.7 mm (1.8 in) on 15 January 1999.

About the Station

Location: New Hampshire, United States, 42.88 latitude, -71.78 longitude.
Elevation: 198 m (650 ft).
Period of record: 1944 to 1999, 56 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 South Lyndeboro. 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 South Lyndeboro, 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	-6.7 C (19.9 F)	-24.4 C (-11.9 F)	n/a	n/a

Which Years Hold Standing Records

32 standing records

32 records at South Lyndeboro still stand. 1970 holds the most, with 18.

All-Time Record Progression

3 new records

3 all-time records were set at South Lyndeboro between 20 August 1991 and 21 October 1996. Each dot is a new record.

When South Lyndeboro set new all-time records
Date	Kind	Detail
1991-08-20	Record daily precipitation	Record daily precipitation 136.9 mm (5.4 in)
1993-03-14	Record daily snowfall	Record daily snowfall 61.0 cm (24.0 in)
1996-10-21	Record daily precipitation	Record daily precipitation 195.6 mm (7.7 in)

Wettest Day of Each Month

Oct: 195.6 mm (7.7 in)

The wettest day on record for each calendar month at South Lyndeboro. The most was 195.6 mm (7.7 in) on 21 October 1996.

Record daily precipitation for each month at South Lyndeboro
Month	Record daily precipitation (mm)	Date
Jan	77.7 mm (3.1 in)	21 January 1964
Feb	67.8 mm (2.7 in)	13 February 1985
Mar	65.0 mm (2.6 in)	31 March 1982
Apr	90.2 mm (3.6 in)	5 April 1987
May	65.3 mm (2.6 in)	30 May 1984
Jun	114.3 mm (4.5 in)	14 June 1998
Jul	109.2 mm (4.3 in)	14 July 1996
Aug	136.9 mm (5.4 in)	20 August 1991
Sep	121.4 mm (4.8 in)	12 September 1960
Oct	195.6 mm (7.7 in)	21 October 1996
Nov	115.1 mm (4.5 in)	12 November 1947
Dec	104.1 mm (4.1 in)	25 December 1994

Period of Record Coverage

1968 to 1970

2 years of record at South Lyndeboro, 1968 to 1970. 2 years have data for under 90 percent of days and are left out of rankings: 1968, 1970.

Latest Records

Latest records at South Lyndeboro
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 January 1999	South Lyndeboro, US	daily rain	45.7 mm (1.8 in)	19.0 mm (0.7 in)	40 years	32 of 100 (Routine)
15 January 1999	South Lyndeboro, US	daily snow depth	17.8 cm (7.0 in)	2.6 cm (1.0 in)	48 years	20 of 100 (Routine)
15 January 1999	South Lyndeboro, US	daily snowfall (Tie)	17.8 cm (7.0 in)	tie	40 years	4 of 100 (Routine)
27 November 1998	South Lyndeboro, US	daily rain	44.5 mm (1.8 in)	6.9 mm (0.27 in)	32 years	18 of 100 (Routine)
13 August 1998	South Lyndeboro, US	daily rain	35.6 mm (1.4 in)	4.1 mm (0.16 in)	45 years	20 of 100 (Routine)
1 July 1998	South Lyndeboro, US	daily rain	23.6 mm (0.9 in)	10.6 mm (0.4 in)	19 years	17 of 100 (Routine)
17 June 1998	South Lyndeboro, US	daily rain	36.8 mm (1.4 in)	12.7 mm (0.5 in)	29 years	24 of 100 (Routine)
14 June 1998	South Lyndeboro, US	monthly rain	114.3 mm (4.5 in)	50.8 mm (2.0 in)	17 years	60 of 100 (Major)
9 May 1998	South Lyndeboro, US	daily rain	35.3 mm (1.4 in)	0.8 mm (0.03 in)	37 years	16 of 100 (Routine)
10 March 1998	South Lyndeboro, US	daily rain	64.3 mm (2.5 in)	17.1 mm (0.7 in)	33 years	29 of 100 (Routine)
24 January 1998	South Lyndeboro, US	daily rain	43.2 mm (1.7 in)	10.9 mm (0.4 in)	15 years	18 of 100 (Routine)
19 January 1998	South Lyndeboro, US	daily snow depth (Tie)	2.5 cm (1.0 in)	tie	52 years	5 of 100 (Routine)
16 January 1998	South Lyndeboro, US	daily rain	19.3 mm (0.8 in)	0.2 mm (0.01 in)	15 years	9 of 100 (Routine)
10 January 1998	South Lyndeboro, US	daily rain	52.3 mm (2.1 in)	30.2 mm (1.2 in)	42 years	42 of 100 (Notable)
23 December 1997	South Lyndeboro, US	daily snowfall	31.5 cm (12.4 in)	13.7 cm (5.4 in)	14 years	30 of 100 (Routine)
15 November 1997	South Lyndeboro, US	daily rain	36.3 mm (1.4 in)	16.5 mm (0.6 in)	30 years	24 of 100 (Routine)
22 August 1997	South Lyndeboro, US	daily rain	55.4 mm (2.2 in)	25.4 mm (1.0 in)	32 years	30 of 100 (Routine)
14 August 1997	South Lyndeboro, US	daily rain	20.3 mm (0.8 in)	10.6 mm (0.4 in)	24 years	19 of 100 (Routine)
9 July 1997	South Lyndeboro, US	daily rain	48.3 mm (1.9 in)	24.7 mm (1.0 in)	4 years	24 of 100 (Routine)
4 July 1997	South Lyndeboro, US	daily rain	12.7 mm (0.5 in)	1.3 mm (0.05 in)	36 years	16 of 100 (Routine)

Extremes by Year

1944 to 1999

Yearly extremes at South Lyndeboro: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	-6.7 C (19.9 F)	1970	-8.3 C (17.0 F)	2
Coldest night (TNn)	-24.4 C (-11.9 F)	1968	-23.8 C (-10.9 F)	2
Wettest day (Rx1day)	195.6 mm (7.7 in)	1996	65.2 mm (2.6 in)	56
Wettest five days (Rx5day)	197.4 mm (7.8 in)	1991	93.1 mm (3.7 in)	56
Longest dry spell (CDD)	29 days	1947	17 days	56

Hottest day (TXx)

The hottest day of the year at South Lyndeboro, 1944 to 1999. The record is -6.7 C (19.9 F) in 1970, marked on the chart; the median year is -8.3 C (17.0 F).

Hottest day (TXx) at South Lyndeboro by year
Year	Hottest day (TXx)
1944	n/a
1945	n/a
1946	n/a
1947	n/a
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
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	-10.0 C (14.0 F)
1969	n/a
1970	-6.7 C (19.9 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a

Coldest night (TNn)

The coldest night of the year at South Lyndeboro, 1944 to 1999. The record is -24.4 C (-11.9 F) in 1968, marked on the chart; the median year is -23.8 C (-10.9 F).

Coldest night (TNn) at South Lyndeboro by year
Year	Coldest night (TNn)
1944	n/a
1945	n/a
1946	n/a
1947	n/a
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
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	-24.4 C (-11.9 F)
1969	n/a
1970	-23.3 C (-9.9 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a

Wettest day (Rx1day)

The wettest day of the year at South Lyndeboro, 1944 to 1999. The record is 195.6 mm (7.7 in) in 1996, marked on the chart; the median year is 65.2 mm (2.6 in).

Wettest day (Rx1day) at South Lyndeboro by year
Year	Wettest day (Rx1day)
1944	47.0 mm (1.9 in)
1945	57.4 mm (2.3 in)
1946	68.6 mm (2.7 in)
1947	115.1 mm (4.5 in)
1948	63.8 mm (2.5 in)
1949	49.8 mm (2.0 in)
1950	76.2 mm (3.0 in)
1951	68.3 mm (2.7 in)
1952	59.9 mm (2.4 in)
1953	54.4 mm (2.1 in)
1954	117.6 mm (4.6 in)
1955	122.7 mm (4.8 in)
1956	60.5 mm (2.4 in)
1957	50.3 mm (2.0 in)
1958	54.4 mm (2.1 in)
1959	85.6 mm (3.4 in)
1960	121.4 mm (4.8 in)
1961	69.1 mm (2.7 in)
1962	100.3 mm (3.9 in)
1963	77.5 mm (3.1 in)
1964	77.7 mm (3.1 in)
1965	47.0 mm (1.9 in)
1966	66.0 mm (2.6 in)
1967	50.5 mm (2.0 in)
1968	59.9 mm (2.4 in)
1969	65.3 mm (2.6 in)
1970	60.5 mm (2.4 in)
1971	65.0 mm (2.6 in)
1972	63.0 mm (2.5 in)
1973	63.5 mm (2.5 in)
1974	44.5 mm (1.8 in)
1975	65.3 mm (2.6 in)
1976	54.9 mm (2.2 in)
1977	49.3 mm (1.9 in)
1978	57.7 mm (2.3 in)
1979	57.2 mm (2.3 in)
1980	78.5 mm (3.1 in)
1981	45.5 mm (1.8 in)
1982	65.0 mm (2.6 in)
1983	53.8 mm (2.1 in)
1984	66.8 mm (2.6 in)
1985	82.8 mm (3.3 in)
1986	72.9 mm (2.9 in)
1987	90.2 mm (3.6 in)
1988	87.4 mm (3.4 in)
1989	93.5 mm (3.7 in)
1990	64.8 mm (2.6 in)
1991	136.9 mm (5.4 in)
1992	45.2 mm (1.8 in)
1993	53.3 mm (2.1 in)
1994	104.1 mm (4.1 in)
1995	88.9 mm (3.5 in)
1996	195.6 mm (7.7 in)
1997	72.4 mm (2.9 in)
1998	114.3 mm (4.5 in)
1999	45.7 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at South Lyndeboro, 1944 to 1999. The record is 197.4 mm (7.8 in) in 1991, marked on the chart; the median year is 93.1 mm (3.7 in).

Wettest five days (Rx5day) at South Lyndeboro by year
Year	Wettest five days (Rx5day)
1944	51.3 mm (2.0 in)
1945	73.1 mm (2.9 in)
1946	74.4 mm (2.9 in)
1947	190.3 mm (7.5 in)
1948	79.7 mm (3.1 in)
1949	58.7 mm (2.3 in)
1950	83.8 mm (3.3 in)
1951	99.3 mm (3.9 in)
1952	92.2 mm (3.6 in)
1953	101.3 mm (4.0 in)
1954	130.0 mm (5.1 in)
1955	189.8 mm (7.5 in)
1956	145.6 mm (5.7 in)
1957	83.1 mm (3.3 in)
1958	79.8 mm (3.1 in)
1959	103.4 mm (4.1 in)
1960	157.7 mm (6.2 in)
1961	86.3 mm (3.4 in)
1962	168.8 mm (6.6 in)
1963	157.3 mm (6.2 in)
1964	102.8 mm (4.0 in)
1965	55.1 mm (2.2 in)
1966	98.1 mm (3.9 in)
1967	64.1 mm (2.5 in)
1968	81.5 mm (3.2 in)
1969	106.2 mm (4.2 in)
1970	80.0 mm (3.1 in)
1971	90.9 mm (3.6 in)
1972	79.5 mm (3.1 in)
1973	102.6 mm (4.0 in)
1974	71.2 mm (2.8 in)
1975	150.9 mm (5.9 in)
1976	54.9 mm (2.2 in)
1977	84.6 mm (3.3 in)
1978	65.8 mm (2.6 in)
1979	116.4 mm (4.6 in)
1980	88.2 mm (3.5 in)
1981	94.2 mm (3.7 in)
1982	83.8 mm (3.3 in)
1983	81.5 mm (3.2 in)
1984	169.6 mm (6.7 in)
1985	91.2 mm (3.6 in)
1986	96.8 mm (3.8 in)
1987	168.7 mm (6.6 in)
1988	114.8 mm (4.5 in)
1989	120.1 mm (4.7 in)
1990	94.0 mm (3.7 in)
1991	197.4 mm (7.8 in)
1992	59.2 mm (2.3 in)
1993	67.3 mm (2.6 in)
1994	115.5 mm (4.5 in)
1995	88.9 mm (3.5 in)
1996	195.6 mm (7.7 in)
1997	113.0 mm (4.4 in)
1998	154.9 mm (6.1 in)
1999	52.1 mm (2.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at South Lyndeboro, 1944 to 1999. The record is 29 days in 1947, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at South Lyndeboro by year
Year	Longest dry spell (CDD)
1944	6 days
1945	12 days
1946	18 days
1947	29 days
1948	25 days
1949	21 days
1950	16 days
1951	13 days
1952	25 days
1953	15 days
1954	14 days
1955	26 days
1956	15 days
1957	18 days
1958	16 days
1959	14 days
1960	17 days
1961	20 days
1962	12 days
1963	28 days
1964	21 days
1965	14 days
1966	16 days
1967	14 days
1968	14 days
1969	16 days
1970	17 days
1971	14 days
1972	9 days
1973	23 days
1974	15 days
1975	16 days
1976	20 days
1977	16 days
1978	17 days
1979	22 days
1980	17 days
1981	14 days
1982	18 days
1983	17 days
1984	19 days
1985	18 days
1986	27 days
1987	19 days
1988	21 days
1989	13 days
1990	20 days
1991	15 days
1992	22 days
1993	26 days
1994	13 days
1995	10 days
1996	29 days
1997	21 days
1998	15 days
1999	5 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

46 years, 1946 to 1998

A day with at least 67.0 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 166.7 mm (6.6 in) of rain is expected about once in 100 years.

Rainfall return levels at South Lyndeboro: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	67.0 mm (2.6 in)
5 years	87.1 mm (3.4 in)
10 years	102.7 mm (4.0 in)
25 years	125.5 mm (4.9 in)
50 years	144.9 mm (5.7 in)	Longer than the 46 years of record
100 years	166.7 mm (6.6 in)	Longer than the 46 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, 46 years of values from 1946 to 1998.

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: 136.9 mm (5.4 in) in 1991; 122.7 mm (4.8 in) in 1955; 121.4 mm (4.8 in) in 1960.

Download the Data

Data for South Lyndeboro standing records by year: CSV or JSON. Field meanings are on the data page.
Data for South Lyndeboro 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 2026-10-16 (16 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).