Massabesic Lake Weather Records (USC00275211)

Record envelope, standing records and threshold days for Massabesic Lake (USC00275211), New Hampshire, United States, with 85 years of record.

Key Facts for Massabesic Lake

Massabesic Lake (USC00275211) is a weather station in New Hampshire, United States at 42.99 latitude and -71.39 longitude, 77 m (253 ft) above sea level.
The station reports from 1942 to 2026, 85 years of record.
1,464 records set at Massabesic Lake still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Massabesic Lake set a daily record high minimum temperature of 21.1 C (70.0 F) on 8 August 2026.

About the Station

Location: New Hampshire, United States, 42.99 latitude, -71.39 longitude.
Elevation: 77 m (253 ft).
Period of record: 1942 to 2026, 85 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

4 days at or beyond a record

The band shows the record high and record low for each calendar day at Massabesic Lake. The lines show the 2026 daily maximum and minimum. 4 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Massabesic Lake, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	19.4 C (66.9 F)	-37.2 C (-35.0 F)	10.0 C (50.0 F)	-26.1 C (-15.0 F)
Feb	23.3 C (73.9 F)	-41.7 C (-43.1 F)	6.7 C (44.1 F)	-21.1 C (-6.0 F)
Mar	30.0 C (86.0 F)	-30.0 C (-22.0 F)	22.8 C (73.0 F)	-15.0 C (5.0 F)
Apr	34.4 C (93.9 F)	-15.6 C (3.9 F)	26.7 C (80.1 F)	-6.1 C (21.0 F)
May	35.0 C (95.0 F)	-8.9 C (16.0 F)	34.4 C (93.9 F)	1.7 C (35.1 F)
Jun	36.7 C (98.1 F)	-1.7 C (28.9 F)	32.8 C (91.0 F)	3.3 C (37.9 F)
Jul	37.8 C (100.0 F)	0.6 C (33.1 F)	35.0 C (95.0 F)	11.7 C (53.1 F)
Aug	40.6 C (105.1 F)	0.0 C (32.0 F)	32.2 C (90.0 F)	10.0 C (50.0 F)
Sep	35.6 C (96.1 F)	-11.1 C (12.0 F)	28.9 C (84.0 F)	6.1 C (43.0 F)
Oct	31.1 C (88.0 F)	-11.1 C (12.0 F)	28.3 C (82.9 F)	1.7 C (35.1 F)
Nov	27.2 C (81.0 F)	-20.0 C (-4.0 F)	n/a	n/a
Dec	25.6 C (78.1 F)	-31.7 C (-25.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Massabesic Lake still stand. 2002 holds the most, with 42.

Standing records at Massabesic Lake by the year they were set
Year set	Standing records
1942	39
1943	39
1944	23
1945	31
1946	33
1947	22
1948	39
1949	36
1950	33
1951	19
1952	12
1953	25
1954	17
1955	9
1956	32
1957	26
1958	13
1959	14
1960	5
1961	22
1962	15
1963	17
1964	18
1965	18
1966	10
1967	22
1968	17
1969	19
1970	8
1971	11
1972	9
1973	13
1974	14
1975	6
1976	26
1977	15
1978	11
1979	21
1980	6
1981	13
1982	18
1983	15
1984	13
1985	7
1986	12
1987	10
1988	16
1989	27
1990	17
1991	16
1992	15
1993	18
1994	11
1995	6
1996	9
1997	10
1998	7
1999	15
2000	22
2001	33
2002	42
2003	11
2004	14
2005	18
2006	18
2007	7
2008	15
2009	20
2010	12
2011	14
2012	22
2013	21
2014	15
2015	14
2016	13
2017	26
2018	17
2019	10
2020	12
2021	16
2022	11
2023	14
2024	15
2025	7
2026	5

All-Time Record Progression

7 new records

7 all-time records were set at Massabesic Lake between 22 June 1973 and 14 March 2018. Each dot is a new record.

When Massabesic Lake set new all-time records
Date	Kind	Detail
1973-06-22	Record high minimum temperature	Record high minimum temperature 23.3 C (73.9 F)
1987-01-03	Record daily snowfall	Record daily snowfall 45.7 cm (18.0 in)
1988-08-03	Record high maximum temperature	Record high maximum temperature 40.6 C (105.1 F)
1999-06-08	Record high minimum temperature	Record high minimum temperature 23.9 C (75.0 F)
2002-07-03	Record high minimum temperature	Record high minimum temperature 25.0 C (77.0 F)
2002-07-04	Record high minimum temperature	Record high minimum temperature 27.2 C (81.0 F)
2018-03-14	Record daily snowfall	Record daily snowfall 48.3 cm (19.0 in)

Wettest Day of Each Month

Sep: 153.7 mm (6.1 in)

The wettest day on record for each calendar month at Massabesic Lake. The most was 153.7 mm (6.1 in) on 11 September 1954.

Record daily precipitation for each month at Massabesic Lake
Month	Record daily precipitation (mm)	Date
Jan	82.8 mm (3.3 in)	7 January 1944
Feb	62.5 mm (2.5 in)	26 February 2010
Mar	60.5 mm (2.4 in)	7 March 2011
Apr	63.5 mm (2.5 in)	22 April 2000
May	152.4 mm (6.0 in)	14 May 2006
Jun	120.7 mm (4.8 in)	30 June 1973
Jul	96.5 mm (3.8 in)	17 July 2023
Aug	106.4 mm (4.2 in)	25 August 1990
Sep	153.7 mm (6.1 in)	11 September 1954
Oct	144.8 mm (5.7 in)	21 October 1996
Nov	83.6 mm (3.3 in)	3 November 1951
Dec	72.9 mm (2.9 in)	12 December 2008

Period of Record Coverage

1942 to 2026

85 years of record at Massabesic Lake, 1942 to 2026. 11 years have data for under 90 percent of days and are left out of rankings: 1979, 1980, 1982, 1984, 1991, 1994, 1995, 2003 and others.

Days with data per year at Massabesic Lake
Year	Days with data	Share of year	Complete
1942	361	99%	Yes
1943	360	99%	Yes
1944	365	100%	Yes
1945	365	100%	Yes
1946	362	99%	Yes
1947	332	91%	Yes
1948	365	100%	Yes
1949	362	99%	Yes
1950	331	91%	Yes
1951	363	99%	Yes
1952	364	99%	Yes
1953	365	100%	Yes
1954	361	99%	Yes
1955	363	99%	Yes
1956	336	92%	Yes
1957	363	99%	Yes
1958	361	99%	Yes
1959	362	99%	Yes
1960	363	99%	Yes
1961	363	99%	Yes
1962	357	98%	Yes
1963	362	99%	Yes
1964	333	91%	Yes
1965	362	99%	Yes
1966	362	99%	Yes
1967	364	100%	Yes
1968	365	100%	Yes
1969	364	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	364	100%	Yes
1974	358	98%	Yes
1975	335	92%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	241	66%	No
1980	275	75%	No
1981	363	99%	Yes
1982	299	82%	No
1983	332	91%	Yes
1984	321	88%	No
1985	364	100%	Yes
1986	364	100%	Yes
1987	357	98%	Yes
1988	362	99%	Yes
1989	359	98%	Yes
1990	349	96%	Yes
1991	311	85%	No
1992	359	98%	Yes
1993	363	99%	Yes
1994	301	82%	No
1995	302	83%	No
1996	365	100%	Yes
1997	363	99%	Yes
1998	361	99%	Yes
1999	363	99%	Yes
2000	366	100%	Yes
2001	350	96%	Yes
2002	350	96%	Yes
2003	325	89%	No
2004	353	96%	Yes
2005	359	98%	Yes
2006	314	86%	No
2007	121	33%	No
2008	362	99%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	363	99%	Yes
2012	346	95%	Yes
2013	351	96%	Yes
2014	360	99%	Yes
2015	360	99%	Yes
2016	365	100%	Yes
2017	362	99%	Yes
2018	361	99%	Yes
2019	360	99%	Yes
2020	363	99%	Yes
2021	359	98%	Yes
2022	350	96%	Yes
2023	359	98%	Yes
2024	366	100%	Yes
2025	348	95%	Yes
2026	282	77%	No

Latest Records

Latest records at Massabesic Lake
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
8 August 2026	Massabesic Lake, US	daily high min	21.1 C (70.0 F)	0.5 C (0.9 F)	23 years	15 of 100 (Routine)
7 August 2026	Massabesic Lake, US	daily high min	21.1 C (70.0 F)	1.1 C (2.0 F)	8 years	12 of 100 (Routine)
3 July 2026	Massabesic Lake, US	daily high max	35.0 C (95.0 F)	1.1 C (2.0 F)	24 years	18 of 100 (Routine)
2 July 2026	Massabesic Lake, US	daily high min (Tie)	21.7 C (71.1 F)	tie	12 years	2 of 100 (Routine)
20 May 2026	Massabesic Lake, US	daily high max	34.4 C (93.9 F)	1.6 C (2.9 F)	40 years	22 of 100 (Routine)
11 March 2026	Massabesic Lake, US	daily high max	22.8 C (73.0 F)	2.8 C (5.0 F)	48 years	26 of 100 (Routine)
11 February 2026	Massabesic Lake, US	daily snowfall	12.7 cm (5.0 in)	3.8 cm (1.5 in)	58 years	28 of 100 (Routine)
30 January 2026	Massabesic Lake, US	daily low min (Tie)	-24.4 C (-11.9 F)	tie	74 years	7 of 100 (Routine)
6 December 2025	Massabesic Lake, US	daily low min (Tie)	-15.6 C (3.9 F)	tie	36 years	4 of 100 (Routine)
21 August 2025	Massabesic Lake, US	daily low max	16.1 C (61.0 F)	1.1 C (2.0 F)	44 years	23 of 100 (Routine)
25 June 2025	Massabesic Lake, US	daily high min	21.1 C (70.0 F)	0.5 C (0.9 F)	48 years	23 of 100 (Routine)
25 June 2025	Massabesic Lake, US	monthly high max (Tie)	36.7 C (98.1 F)	tie	33 years	7 of 100 (Routine)
24 June 2025	Massabesic Lake, US	daily high min (Tie)	21.1 C (70.0 F)	tie	12 years	2 of 100 (Routine)
23 June 2025	Massabesic Lake, US	daily high min (Tie)	18.9 C (66.0 F)	tie	48 years	5 of 100 (Routine)
6 June 2025	Massabesic Lake, US	daily high max	33.3 C (91.9 F)	1.6 C (2.9 F)	72 years	32 of 100 (Routine)
6 June 2025	Massabesic Lake, US	daily high min	19.4 C (66.9 F)	0.5 C (0.9 F)	15 years	13 of 100 (Routine)
23 May 2025	Massabesic Lake, US	daily low max	8.9 C (48.0 F)	1.7 C (3.1 F)	20 years	17 of 100 (Routine)
5 May 2025	Massabesic Lake, US	daily rain	44.5 mm (1.8 in)	31.0 mm (1.2 in)	72 years	60 of 100 (Major)
30 March 2025	Massabesic Lake, US	daily low max (Tie)	0.6 C (33.1 F)	tie	40 years	5 of 100 (Routine)
17 March 2025	Massabesic Lake, US	daily high min	5.6 C (42.1 F)	1.2 C (2.2 F)	8 years	12 of 100 (Routine)

Climate Trend

64 complete years, 1942 to 2024

One stripe for each of 64 complete years at Massabesic Lake, 1942 to 2024. Blue stripes are years cooler than the station's own mean of 8.1 C (46.6 F); red stripes are warmer. The coolest year was 1943, at 5.5 C (41.9 F), and the warmest was 2010, at 9.9 C (49.7 F). The strongest colour marks a difference of 2.7 C (4.9 F).

Annual mean temperature at Massabesic Lake as warming stripes, 1942 to 2024
Year	Annual mean temperature	Difference from the station mean
1942	6.9 C	-1.18 C
1943	5.5 C	-2.61 C
1944	6.6 C	-1.49 C
1945	7.0 C	-1.10 C
1946	7.2 C	-0.93 C
1948	6.9 C	-1.23 C
1949	9.4 C	+1.32 C
1951	8.4 C	+0.33 C
1952	8.6 C	+0.53 C
1953	9.3 C	+1.24 C
1954	8.3 C	+0.22 C
1955	8.4 C	+0.32 C
1957	7.9 C	-0.21 C
1958	7.1 C	-1.05 C
1959	8.3 C	+0.23 C
1960	7.7 C	-0.36 C
1961	7.9 C	-0.22 C
1962	7.0 C	-1.09 C
1963	7.5 C	-0.56 C
1965	7.7 C	-0.43 C
1966	7.8 C	-0.31 C
1967	7.4 C	-0.69 C
1968	7.6 C	-0.51 C
1969	8.2 C	+0.12 C
1970	7.8 C	-0.27 C
1971	7.8 C	-0.26 C
1972	7.3 C	-0.76 C
1973	9.1 C	+0.95 C
1974	8.1 C	-0.04 C
1976	7.9 C	-0.18 C
1977	8.3 C	+0.20 C
1978	7.4 C	-0.66 C
1981	8.2 C	+0.12 C
1985	8.3 C	+0.16 C
1986	8.2 C	+0.12 C
1987	8.0 C	-0.06 C
1988	8.5 C	+0.38 C
1989	8.3 C	+0.18 C
1990	9.1 C	+0.99 C
1992	7.1 C	-0.96 C
1993	8.3 C	+0.22 C
1996	7.1 C	-0.98 C
1997	6.8 C	-1.34 C
1998	8.3 C	+0.15 C
1999	7.9 C	-0.25 C
2000	6.2 C	-1.89 C
2001	6.7 C	-1.43 C
2002	8.2 C	+0.10 C
2004	8.8 C	+0.67 C
2005	9.1 C	+1.04 C
2008	8.6 C	+0.50 C
2009	8.2 C	+0.06 C
2010	9.9 C	+1.76 C
2011	9.1 C	+1.02 C
2013	9.1 C	+1.02 C
2016	9.3 C	+1.19 C
2017	8.8 C	+0.71 C
2018	8.6 C	+0.53 C
2019	8.2 C	+0.07 C
2020	9.4 C	+1.33 C
2021	9.7 C	+1.55 C
2022	9.3 C	+1.15 C
2023	9.3 C	+1.20 C
2024	9.8 C	+1.66 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1942 to 2024. In Fahrenheit: 0.3 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 64 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Massabesic Lake
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.1 to 0.3) per decade	0.3 F (0.2 to 0.5) per decade	1942 to 2024	64	Rise
Mean daily maximum	0.03 C (-0.05 to 0.10) per decade	0.05 F (-0.09 to 0.19) per decade	1942 to 2024	64	Not clearly different from zero
Mean daily minimum	0.4 C (0.2 to 0.5) per decade	0.6 F (0.4 to 0.9) per decade	1942 to 2024	64	Rise

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

1942 to 2026

Yearly extremes at Massabesic Lake: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.6 C (105.1 F)	1988	34.4 C (93.9 F)	85
Coldest night (TNn)	-41.7 C (-43.1 F)	1943	-26.1 C (-15.0 F)	85
Wettest day (Rx1day)	153.7 mm (6.1 in)	1954	58.2 mm (2.3 in)	85
Wettest five days (Rx5day)	268.8 mm (10.6 in)	2006	85.1 mm (3.4 in)	85
Longest dry spell (CDD)	31 days	1948	16 days	85

Hottest day (TXx)

The hottest day of the year at Massabesic Lake, 1942 to 2026. The record is 40.6 C (105.1 F) in 1988, marked on the chart; the median year is 34.4 C (93.9 F).

Hottest day (TXx) at Massabesic Lake by year
Year	Hottest day (TXx)
1942	32.8 C (91.0 F)
1943	33.9 C (93.0 F)
1944	36.7 C (98.1 F)
1945	35.0 C (95.0 F)
1946	33.9 C (93.0 F)
1947	35.0 C (95.0 F)
1948	36.7 C (98.1 F)
1949	37.2 C (99.0 F)
1950	32.2 C (90.0 F)
1951	31.7 C (89.1 F)
1952	35.6 C (96.1 F)
1953	35.6 C (96.1 F)
1954	33.9 C (93.0 F)
1955	36.7 C (98.1 F)
1956	35.0 C (95.0 F)
1957	33.3 C (91.9 F)
1958	33.3 C (91.9 F)
1959	33.9 C (93.0 F)
1960	33.3 C (91.9 F)
1961	32.8 C (91.0 F)
1962	35.0 C (95.0 F)
1963	36.1 C (97.0 F)
1964	35.0 C (95.0 F)
1965	35.0 C (95.0 F)
1966	35.0 C (95.0 F)
1967	33.9 C (93.0 F)
1968	35.0 C (95.0 F)
1969	35.0 C (95.0 F)
1970	34.4 C (93.9 F)
1971	34.4 C (93.9 F)
1972	33.3 C (91.9 F)
1973	35.0 C (95.0 F)
1974	33.3 C (91.9 F)
1975	37.2 C (99.0 F)
1976	34.4 C (93.9 F)
1977	36.7 C (98.1 F)
1978	35.0 C (95.0 F)
1979	32.2 C (90.0 F)
1980	33.9 C (93.0 F)
1981	34.4 C (93.9 F)
1982	31.1 C (88.0 F)
1983	34.4 C (93.9 F)
1984	34.4 C (93.9 F)
1985	33.3 C (91.9 F)
1986	33.9 C (93.0 F)
1987	35.0 C (95.0 F)
1988	40.6 C (105.1 F)
1989	37.8 C (100.0 F)
1990	36.7 C (98.1 F)
1991	37.2 C (99.0 F)
1992	33.9 C (93.0 F)
1993	36.1 C (97.0 F)
1994	34.4 C (93.9 F)
1995	36.7 C (98.1 F)
1996	34.4 C (93.9 F)
1997	33.9 C (93.0 F)
1998	33.9 C (93.0 F)
1999	35.6 C (96.1 F)
2000	33.9 C (93.0 F)
2001	36.1 C (97.0 F)
2002	36.1 C (97.0 F)
2003	33.9 C (93.0 F)
2004	33.3 C (91.9 F)
2005	33.9 C (93.0 F)
2006	35.6 C (96.1 F)
2007	35.6 C (96.1 F)
2008	36.7 C (98.1 F)
2009	33.3 C (91.9 F)
2010	35.6 C (96.1 F)
2011	36.1 C (97.0 F)
2012	35.0 C (95.0 F)
2013	34.4 C (93.9 F)
2014	32.8 C (91.0 F)
2015	33.9 C (93.0 F)
2016	34.4 C (93.9 F)
2017	33.9 C (93.0 F)
2018	33.9 C (93.0 F)
2019	34.4 C (93.9 F)
2020	32.2 C (90.0 F)
2021	33.3 C (91.9 F)
2022	34.4 C (93.9 F)
2023	32.8 C (91.0 F)
2024	36.7 C (98.1 F)
2025	36.7 C (98.1 F)
2026	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at Massabesic Lake, 1942 to 2026. The record is -41.7 C (-43.1 F) in 1943, marked on the chart; the median year is -26.1 C (-15.0 F).

Coldest night (TNn) at Massabesic Lake by year
Year	Coldest night (TNn)
1942	-32.2 C (-26.0 F)
1943	-41.7 C (-43.1 F)
1944	-32.2 C (-26.0 F)
1945	-31.7 C (-25.1 F)
1946	-31.1 C (-24.0 F)
1947	-27.2 C (-17.0 F)
1948	-32.2 C (-26.0 F)
1949	-27.8 C (-18.0 F)
1950	-30.0 C (-22.0 F)
1951	-31.7 C (-25.1 F)
1952	-25.0 C (-13.0 F)
1953	-18.3 C (-0.9 F)
1954	-31.7 C (-25.1 F)
1955	-26.7 C (-16.1 F)
1956	-27.2 C (-17.0 F)
1957	-36.7 C (-34.1 F)
1958	-30.6 C (-23.1 F)
1959	-23.9 C (-11.0 F)
1960	-23.3 C (-9.9 F)
1961	-37.2 C (-35.0 F)
1962	-28.9 C (-20.0 F)
1963	-31.1 C (-24.0 F)
1964	-30.0 C (-22.0 F)
1965	-26.1 C (-15.0 F)
1966	-24.4 C (-11.9 F)
1967	-28.9 C (-20.0 F)
1968	-26.7 C (-16.1 F)
1969	-23.3 C (-9.9 F)
1970	-26.1 C (-15.0 F)
1971	-30.6 C (-23.1 F)
1972	-25.6 C (-14.1 F)
1973	-26.1 C (-15.0 F)
1974	-26.1 C (-15.0 F)
1975	-28.3 C (-18.9 F)
1976	-26.7 C (-16.1 F)
1977	-25.0 C (-13.0 F)
1978	-26.1 C (-15.0 F)
1979	-22.8 C (-9.0 F)
1980	-15.6 C (3.9 F)
1981	-26.1 C (-15.0 F)
1982	-27.2 C (-17.0 F)
1983	-24.4 C (-11.9 F)
1984	-33.9 C (-29.0 F)
1985	-25.0 C (-13.0 F)
1986	-21.1 C (-6.0 F)
1987	-24.4 C (-11.9 F)
1988	-30.6 C (-23.1 F)
1989	-25.6 C (-14.1 F)
1990	-22.2 C (-8.0 F)
1991	-21.1 C (-6.0 F)
1992	-21.7 C (-7.1 F)
1993	-26.1 C (-15.0 F)
1994	-27.2 C (-17.0 F)
1995	-25.0 C (-13.0 F)
1996	-28.3 C (-18.9 F)
1997	-27.8 C (-18.0 F)
1998	-23.3 C (-9.9 F)
1999	-28.9 C (-20.0 F)
2000	-26.1 C (-15.0 F)
2001	-25.0 C (-13.0 F)
2002	-18.9 C (-2.0 F)
2003	-25.0 C (-13.0 F)
2004	-23.9 C (-11.0 F)
2005	-23.9 C (-11.0 F)
2006	-16.1 C (3.0 F)
2007	-20.0 C (-4.0 F)
2008	-25.0 C (-13.0 F)
2009	-28.3 C (-18.9 F)
2010	-17.8 C (0.0 F)
2011	-27.8 C (-18.0 F)
2012	-20.6 C (-5.1 F)
2013	-20.6 C (-5.1 F)
2014	-25.6 C (-14.1 F)
2015	-28.3 C (-18.9 F)
2016	-25.6 C (-14.1 F)
2017	-22.2 C (-8.0 F)
2018	-25.0 C (-13.0 F)
2019	-21.7 C (-7.1 F)
2020	-17.8 C (0.0 F)
2021	-18.3 C (-0.9 F)
2022	-21.7 C (-7.1 F)
2023	-25.6 C (-14.1 F)
2024	-16.1 C (3.0 F)
2025	-22.8 C (-9.0 F)
2026	-26.1 C (-15.0 F)

Wettest day (Rx1day)

The wettest day of the year at Massabesic Lake, 1942 to 2026. The record is 153.7 mm (6.1 in) in 1954, marked on the chart; the median year is 58.2 mm (2.3 in).

Wettest day (Rx1day) at Massabesic Lake by year
Year	Wettest day (Rx1day)
1942	58.7 mm (2.3 in)
1943	50.8 mm (2.0 in)
1944	96.3 mm (3.8 in)
1945	67.3 mm (2.6 in)
1946	92.2 mm (3.6 in)
1947	69.3 mm (2.7 in)
1948	52.6 mm (2.1 in)
1949	39.9 mm (1.6 in)
1950	68.1 mm (2.7 in)
1951	83.6 mm (3.3 in)
1952	50.8 mm (2.0 in)
1953	66.8 mm (2.6 in)
1954	153.7 mm (6.1 in)
1955	61.2 mm (2.4 in)
1956	40.4 mm (1.6 in)
1957	42.4 mm (1.7 in)
1958	60.5 mm (2.4 in)
1959	42.2 mm (1.7 in)
1960	94.5 mm (3.7 in)
1961	57.2 mm (2.3 in)
1962	96.0 mm (3.8 in)
1963	43.9 mm (1.7 in)
1964	41.9 mm (1.6 in)
1965	35.1 mm (1.4 in)
1966	47.2 mm (1.9 in)
1967	69.9 mm (2.8 in)
1968	46.7 mm (1.8 in)
1969	64.5 mm (2.5 in)
1970	56.1 mm (2.2 in)
1971	36.6 mm (1.4 in)
1972	49.8 mm (2.0 in)
1973	120.7 mm (4.8 in)
1974	54.1 mm (2.1 in)
1975	67.8 mm (2.7 in)
1976	61.5 mm (2.4 in)
1977	54.6 mm (2.1 in)
1978	55.4 mm (2.2 in)
1979	58.2 mm (2.3 in)
1980	40.6 mm (1.6 in)
1981	51.8 mm (2.0 in)
1982	27.9 mm (1.1 in)
1983	59.2 mm (2.3 in)
1984	41.1 mm (1.6 in)
1985	54.4 mm (2.1 in)
1986	56.6 mm (2.2 in)
1987	60.5 mm (2.4 in)
1988	68.6 mm (2.7 in)
1989	41.1 mm (1.6 in)
1990	106.4 mm (4.2 in)
1991	97.0 mm (3.8 in)
1992	48.3 mm (1.9 in)
1993	46.2 mm (1.8 in)
1994	43.7 mm (1.7 in)
1995	46.7 mm (1.8 in)
1996	144.8 mm (5.7 in)
1997	44.5 mm (1.8 in)
1998	91.4 mm (3.6 in)
1999	67.3 mm (2.6 in)
2000	63.5 mm (2.5 in)
2001	76.2 mm (3.0 in)
2002	43.7 mm (1.7 in)
2003	54.6 mm (2.1 in)
2004	63.5 mm (2.5 in)
2005	110.5 mm (4.4 in)
2006	152.4 mm (6.0 in)
2007	32.8 mm (1.3 in)
2008	133.4 mm (5.3 in)
2009	47.0 mm (1.9 in)
2010	62.5 mm (2.5 in)
2011	60.5 mm (2.4 in)
2012	80.0 mm (3.1 in)
2013	99.1 mm (3.9 in)
2014	45.7 mm (1.8 in)
2015	43.2 mm (1.7 in)
2016	63.5 mm (2.5 in)
2017	77.5 mm (3.1 in)
2018	73.7 mm (2.9 in)
2019	50.8 mm (2.0 in)
2020	45.5 mm (1.8 in)
2021	61.7 mm (2.4 in)
2022	58.4 mm (2.3 in)
2023	96.5 mm (3.8 in)
2024	52.1 mm (2.1 in)
2025	44.5 mm (1.8 in)
2026	39.4 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Massabesic Lake, 1942 to 2026. The record is 268.8 mm (10.6 in) in 2006, marked on the chart; the median year is 85.1 mm (3.4 in).

Wettest five days (Rx5day) at Massabesic Lake by year
Year	Wettest five days (Rx5day)
1942	27.2 mm (1.1 in)
1943	82.0 mm (3.2 in)
1944	124.2 mm (4.9 in)
1945	113.6 mm (4.5 in)
1946	105.2 mm (4.1 in)
1947	113.0 mm (4.4 in)
1948	66.8 mm (2.6 in)
1949	51.9 mm (2.0 in)
1950	75.0 mm (3.0 in)
1951	106.7 mm (4.2 in)
1952	89.7 mm (3.5 in)
1953	94.3 mm (3.7 in)
1954	165.1 mm (6.5 in)
1955	116.8 mm (4.6 in)
1956	93.1 mm (3.7 in)
1957	73.1 mm (2.9 in)
1958	64.8 mm (2.6 in)
1959	79.5 mm (3.1 in)
1960	121.6 mm (4.8 in)
1961	69.2 mm (2.7 in)
1962	167.2 mm (6.6 in)
1963	96.6 mm (3.8 in)
1964	70.7 mm (2.8 in)
1965	56.2 mm (2.2 in)
1966	58.5 mm (2.3 in)
1967	90.8 mm (3.6 in)
1968	62.4 mm (2.5 in)
1969	101.6 mm (4.0 in)
1970	65.4 mm (2.6 in)
1971	57.9 mm (2.3 in)
1972	80.6 mm (3.2 in)
1973	159.6 mm (6.3 in)
1974	75.7 mm (3.0 in)
1975	126.0 mm (5.0 in)
1976	71.9 mm (2.8 in)
1977	80.9 mm (3.2 in)
1978	56.7 mm (2.2 in)
1979	89.7 mm (3.5 in)
1980	63.7 mm (2.5 in)
1981	105.7 mm (4.2 in)
1982	63.3 mm (2.5 in)
1983	74.7 mm (2.9 in)
1984	127.3 mm (5.0 in)
1985	91.5 mm (3.6 in)
1986	68.1 mm (2.7 in)
1987	110.5 mm (4.4 in)
1988	117.2 mm (4.6 in)
1989	85.6 mm (3.4 in)
1990	156.7 mm (6.2 in)
1991	156.9 mm (6.2 in)
1992	59.3 mm (2.3 in)
1993	54.9 mm (2.2 in)
1994	54.6 mm (2.1 in)
1995	64.0 mm (2.5 in)
1996	184.9 mm (7.3 in)
1997	64.6 mm (2.5 in)
1998	156.4 mm (6.2 in)
1999	78.2 mm (3.1 in)
2000	84.8 mm (3.3 in)
2001	87.1 mm (3.4 in)
2002	60.9 mm (2.4 in)
2003	114.0 mm (4.5 in)
2004	121.1 mm (4.8 in)
2005	159.5 mm (6.3 in)
2006	268.8 mm (10.6 in)
2007	62.5 mm (2.5 in)
2008	148.9 mm (5.9 in)
2009	83.5 mm (3.3 in)
2010	121.9 mm (4.8 in)
2011	76.8 mm (3.0 in)
2012	109.0 mm (4.3 in)
2013	129.1 mm (5.1 in)
2014	85.1 mm (3.4 in)
2015	70.1 mm (2.8 in)
2016	67.8 mm (2.7 in)
2017	109.8 mm (4.3 in)
2018	113.0 mm (4.4 in)
2019	64.3 mm (2.5 in)
2020	73.2 mm (2.9 in)
2021	108.5 mm (4.3 in)
2022	74.7 mm (2.9 in)
2023	161.0 mm (6.3 in)
2024	83.9 mm (3.3 in)
2025	104.7 mm (4.1 in)
2026	65.1 mm (2.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Massabesic Lake, 1942 to 2026. The record is 31 days in 1948, marked on the chart; the median year is 16 days.

Longest dry spell (CDD) at Massabesic Lake by year
Year	Longest dry spell (CDD)
1942	14 days
1943	19 days
1944	16 days
1945	12 days
1946	17 days
1947	30 days
1948	31 days
1949	14 days
1950	23 days
1951	14 days
1952	21 days
1953	15 days
1954	14 days
1955	25 days
1956	16 days
1957	18 days
1958	16 days
1959	14 days
1960	17 days
1961	15 days
1962	14 days
1963	28 days
1964	19 days
1965	15 days
1966	12 days
1967	11 days
1968	18 days
1969	17 days
1970	17 days
1971	15 days
1972	17 days
1973	15 days
1974	15 days
1975	25 days
1976	20 days
1977	16 days
1978	23 days
1979	13 days
1980	11 days
1981	14 days
1982	17 days
1983	19 days
1984	16 days
1985	18 days
1986	17 days
1987	28 days
1988	14 days
1989	18 days
1990	14 days
1991	12 days
1992	20 days
1993	11 days
1994	11 days
1995	19 days
1996	19 days
1997	19 days
1998	20 days
1999	20 days
2000	12 days
2001	20 days
2002	11 days
2003	16 days
2004	14 days
2005	14 days
2006	17 days
2007	20 days
2008	16 days
2009	15 days
2010	21 days
2011	16 days
2012	20 days
2013	14 days
2014	13 days
2015	25 days
2016	20 days
2017	13 days
2018	14 days
2019	15 days
2020	24 days
2021	17 days
2022	13 days
2023	25 days
2024	17 days
2025	15 days
2026	16 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

64 years with a frost

Across 64 years with a frost, the median last spring frost at Massabesic Lake falls on 14 May and the median first autumn frost on 27 September, which leaves a median of 142 days between them.

In 1986 to 2024 the median growing season was 157 days. That is 31 days more than in 1942 to 1976.

Fitted over all years, the growing season changes by +6.9 days per decade at this station.

Frost dates and growing season at Massabesic Lake
Measure	Median, all years	Earliest period (1942 to 1976)	Recent period (1986 to 2024)	Recent against earliest	Fitted trend
Last spring frost	14 May	18 May	6 May	12 days earlier	-3.1 days per decade
First autumn frost	27 September	24 September	8 October	14 days later	+3.8 days per decade
Growing days	142 days	126 days	157 days	31 days more	+6.9 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.

Rainfall Return Levels

73 years, 1944 to 2025

A day with at least 59.1 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 169.1 mm (6.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Massabesic Lake: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	59.1 mm (2.3 in)
5 years	80.0 mm (3.1 in)
10 years	96.7 mm (3.8 in)
25 years	121.9 mm (4.8 in)
50 years	143.9 mm (5.7 in)
100 years	169.1 mm (6.7 in)	Longer than the 73 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, 73 years of values from 1944 to 2025.

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: 153.7 mm (6.1 in) in 1954; 144.8 mm (5.7 in) in 1996; 133.4 mm (5.3 in) in 2008.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Massabesic Lake, at 2016. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 2016 ran 0.8 C (1.4 F) lower than in the years before (likely change).

Suspected changes in the annual mean temperature at Massabesic Lake, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
2016	-0.8	-1.4	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Climate Twins

2005 to 2024 against 1961 to 1990

Over 2005 to 2024, Massabesic Lake had a mean temperature of 9.1 C (48.4 F) and 1,179.0 mm (46.4 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Mohonk Lake (United States, 264 km away), Westfield 2 SSE (United States, 674 km away) and Bulls Brg Dam (United States, 227 km away).

Climate twins of Massabesic Lake: stations whose 1961 to 1990 climate is closest to its 2005 to 2024 climate
Twin station	Country	Distance away	Mean temperature, 1961-1990	Rain a year, 1961-1990	Climate difference
Mohonk Lake	United States	264 km (164 mi)	9.0 C (48.2 F)	1,216.8 mm (47.9 in)	0.51
Westfield 2 SSE	United States	674 km (419 mi)	9.0 C (48.1 F)	1,164.0 mm (45.8 in)	0.56
Bulls Brg Dam	United States	227 km (141 mi)	9.2 C (48.5 F)	1,127.3 mm (44.4 in)	0.56

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

Data for Massabesic Lake standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Massabesic Lake 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).