Plymouth Muni AP Weather Records (USW00054769)

Record envelope, standing records and threshold days for Plymouth Muni AP (USW00054769), Massachusetts, United States, with 31 years of record.

Key Facts for Plymouth Muni AP

Plymouth Muni AP (USW00054769) is a weather station in Massachusetts, United States at 41.91 latitude and -70.73 longitude, 42 m (139 ft) above sea level.
The station reports from 1996 to 2026, 31 years of record.
1,464 records set at Plymouth Muni AP still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Massachusetts, United States, 41.91 latitude, -70.73 longitude.
Elevation: 42 m (139 ft).
Period of record: 1996 to 2026, 31 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

20 days at or beyond a record

The band shows the record high and record low for each calendar day at Plymouth Muni AP. The lines show the 2026 daily maximum and minimum. 20 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Plymouth Muni AP, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	20.6 C (69.1 F)	-23.9 C (-11.0 F)	11.1 C (52.0 F)	-16.6 C (2.1 F)
Feb	21.1 C (70.0 F)	-24.3 C (-11.7 F)	13.9 C (57.0 F)	-16.0 C (3.2 F)
Mar	26.7 C (80.1 F)	-19.9 C (-3.8 F)	20.6 C (69.1 F)	-11.0 C (12.2 F)
Apr	33.3 C (91.9 F)	-10.5 C (13.1 F)	25.0 C (77.0 F)	-3.8 C (25.2 F)
May	33.9 C (93.0 F)	-3.3 C (26.1 F)	25.0 C (77.0 F)	1.1 C (34.0 F)
Jun	37.8 C (100.0 F)	1.1 C (34.0 F)	37.8 C (100.0 F)	6.7 C (44.1 F)
Jul	38.3 C (100.9 F)	7.2 C (45.0 F)	36.7 C (98.1 F)	9.4 C (48.9 F)
Aug	37.2 C (99.0 F)	7.8 C (46.0 F)	33.3 C (91.9 F)	7.8 C (46.0 F)
Sep	35.6 C (96.1 F)	0.0 C (32.0 F)	27.8 C (82.0 F)	3.9 C (39.0 F)
Oct	30.0 C (86.0 F)	-7.8 C (18.0 F)	28.3 C (82.9 F)	0.0 C (32.0 F)
Nov	26.1 C (79.0 F)	-12.8 C (9.0 F)	16.7 C (62.1 F)	-6.1 C (21.0 F)
Dec	24.4 C (75.9 F)	-16.1 C (3.0 F)	14.4 C (57.9 F)	-15.6 C (3.9 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at Plymouth Muni AP still stand. 2000 holds the most, with 75.

Standing records at Plymouth Muni AP by the year they were set
Year set	Standing records
1996	32
1997	59
1998	39
1999	61
2000	75
2001	54
2002	55
2003	50
2004	44
2005	69
2006	45
2007	50
2008	45
2009	45
2010	54
2011	56
2012	50
2013	40
2014	52
2015	62
2016	57
2017	57
2018	60
2019	27
2020	35
2021	35
2022	54
2023	32
2024	40
2025	30

Wettest Day of Each Month

Jun: 137.4 mm (5.4 in)

The wettest day on record for each calendar month at Plymouth Muni AP. The most was 137.4 mm (5.4 in) on 7 June 2006.

Record daily precipitation for each month at Plymouth Muni AP
Month	Record daily precipitation (mm)	Date
Jan	70.6 mm (2.8 in)	20 January 2019
Feb	56.9 mm (2.2 in)	13 February 2008
Mar	84.1 mm (3.3 in)	2 March 2018
Apr	75.9 mm (3.0 in)	1 April 2017
May	132.1 mm (5.2 in)	22 May 2025
Jun	137.4 mm (5.4 in)	7 June 2006
Jul	135.4 mm (5.3 in)	12 July 2019
Aug	78.7 mm (3.1 in)	29 August 2009
Sep	91.2 mm (3.6 in)	6 September 2008
Oct	117.6 mm (4.6 in)	13 October 2025
Nov	79.2 mm (3.1 in)	23 November 2006
Dec	83.3 mm (3.3 in)	11 December 2024

Period of Record Coverage

1996 to 2025

30 years of record at Plymouth Muni AP, 1996 to 2025. 1 years have data for under 90 percent of days and are left out of rankings: 1996.

Days with data per year at Plymouth Muni AP
Year	Days with data	Share of year	Complete
1996	166	45%	No
1997	351	96%	Yes
1998	358	98%	Yes
1999	359	98%	Yes
2000	363	99%	Yes
2001	363	99%	Yes
2002	363	99%	Yes
2003	360	99%	Yes
2004	364	99%	Yes
2005	363	99%	Yes
2006	365	100%	Yes
2007	364	100%	Yes
2008	365	100%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	358	98%	Yes
2012	362	99%	Yes
2013	360	99%	Yes
2014	362	99%	Yes
2015	365	100%	Yes
2016	365	100%	Yes
2017	365	100%	Yes
2018	364	100%	Yes
2019	359	98%	Yes
2020	364	99%	Yes
2021	363	99%	Yes
2022	364	100%	Yes
2023	361	99%	Yes
2024	366	100%	Yes
2025	361	99%	Yes

Latest Records

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

Climate Trend

29 complete years, 1997 to 2025

One stripe for each of 29 complete years at Plymouth Muni AP, 1997 to 2025. Blue stripes are years cooler than the station's own mean of 10.3 C (50.6 F); red stripes are warmer. The coolest year was 2003, at 8.9 C (48.1 F), and the warmest was 2023, at 11.7 C (53.1 F). The strongest colour marks a difference of 1.5 C (2.7 F).

Annual mean temperature at Plymouth Muni AP as warming stripes, 1997 to 2025
Year	Annual mean temperature	Difference from the station mean
1997	8.9 C	-1.40 C
1998	10.3 C	-0.01 C
1999	10.4 C	+0.01 C
2000	9.3 C	-1.03 C
2001	10.0 C	-0.31 C
2002	10.1 C	-0.29 C
2003	8.9 C	-1.41 C
2004	9.1 C	-1.27 C
2005	9.3 C	-1.03 C
2006	10.5 C	+0.12 C
2007	9.7 C	-0.61 C
2008	10.0 C	-0.33 C
2009	9.5 C	-0.83 C
2010	11.4 C	+1.07 C
2011	11.1 C	+0.76 C
2012	11.4 C	+1.05 C
2013	10.3 C	-0.03 C
2014	9.6 C	-0.77 C
2015	9.9 C	-0.42 C
2016	10.9 C	+0.60 C
2017	10.7 C	+0.40 C
2018	11.3 C	+0.97 C
2019	10.0 C	-0.35 C
2020	11.2 C	+0.87 C
2021	11.2 C	+0.86 C
2022	11.3 C	+0.97 C
2023	11.7 C	+1.37 C
2024	11.5 C	+1.16 C
2025	10.3 C	-0.08 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

1996 to 2026

Yearly extremes at Plymouth Muni AP: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.3 C (100.9 F)	2010	35.6 C (96.1 F)	31
Coldest night (TNn)	-24.3 C (-11.7 F)	2015	-17.8 C (0.0 F)	31
Wettest day (Rx1day)	137.4 mm (5.4 in)	2006	76.2 mm (3.0 in)	29
Wettest five days (Rx5day)	174.9 mm (6.9 in)	2006	110.2 mm (4.3 in)	29
Longest dry spell (CDD)	33 days	2021	17 days	29

Hottest day (TXx)

The hottest day of the year at Plymouth Muni AP, 1996 to 2026. The record is 38.3 C (100.9 F) in 2010, marked on the chart; the median year is 35.6 C (96.1 F).

Hottest day (TXx) at Plymouth Muni AP by year
Year	Hottest day (TXx)
1996	30.6 C (87.1 F)
1997	34.4 C (93.9 F)
1998	32.8 C (91.0 F)
1999	36.7 C (98.1 F)
2000	32.2 C (90.0 F)
2001	35.6 C (96.1 F)
2002	36.7 C (98.1 F)
2003	33.3 C (91.9 F)
2004	32.2 C (90.0 F)
2005	35.6 C (96.1 F)
2006	37.2 C (99.0 F)
2007	33.9 C (93.0 F)
2008	35.0 C (95.0 F)
2009	33.3 C (91.9 F)
2010	38.3 C (100.9 F)
2011	38.3 C (100.9 F)
2012	35.6 C (96.1 F)
2013	36.1 C (97.0 F)
2014	32.2 C (90.0 F)
2015	35.0 C (95.0 F)
2016	36.1 C (97.0 F)
2017	34.4 C (93.9 F)
2018	35.6 C (96.1 F)
2019	35.0 C (95.0 F)
2020	36.7 C (98.1 F)
2021	35.6 C (96.1 F)
2022	36.7 C (98.1 F)
2023	33.9 C (93.0 F)
2024	35.0 C (95.0 F)
2025	37.8 C (100.0 F)
2026	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at Plymouth Muni AP, 1996 to 2026. The record is -24.3 C (-11.7 F) in 2015, marked on the chart; the median year is -17.8 C (0.0 F).

Coldest night (TNn) at Plymouth Muni AP by year
Year	Coldest night (TNn)
1996	-13.9 C (7.0 F)
1997	-17.8 C (0.0 F)
1998	-15.0 C (5.0 F)
1999	-18.9 C (-2.0 F)
2000	-20.0 C (-4.0 F)
2001	-15.0 C (5.0 F)
2002	-15.0 C (5.0 F)
2003	-20.0 C (-4.0 F)
2004	-22.2 C (-8.0 F)
2005	-23.9 C (-11.0 F)
2006	-15.5 C (4.1 F)
2007	-16.6 C (2.1 F)
2008	-15.5 C (4.1 F)
2009	-19.9 C (-3.8 F)
2010	-16.6 C (2.1 F)
2011	-18.2 C (-0.8 F)
2012	-13.2 C (8.2 F)
2013	-16.0 C (3.2 F)
2014	-22.7 C (-8.9 F)
2015	-24.3 C (-11.7 F)
2016	-23.2 C (-9.8 F)
2017	-19.3 C (-2.7 F)
2018	-18.8 C (-1.8 F)
2019	-16.0 C (3.2 F)
2020	-13.2 C (8.2 F)
2021	-14.3 C (6.3 F)
2022	-19.3 C (-2.7 F)
2023	-22.7 C (-8.9 F)
2024	-11.6 C (11.1 F)
2025	-16.6 C (2.1 F)
2026	-21.7 C (-7.1 F)

Wettest day (Rx1day)

The wettest day of the year at Plymouth Muni AP, 1996 to 2026. The record is 137.4 mm (5.4 in) in 2006, marked on the chart; the median year is 76.2 mm (3.0 in).

Wettest day (Rx1day) at Plymouth Muni AP by year
Year	Wettest day (Rx1day)
1996	n/a
1997	n/a
1998	93.0 mm (3.7 in)
1999	64.0 mm (2.5 in)
2000	74.7 mm (2.9 in)
2001	80.0 mm (3.1 in)
2002	49.0 mm (1.9 in)
2003	65.8 mm (2.6 in)
2004	63.0 mm (2.5 in)
2005	80.5 mm (3.2 in)
2006	137.4 mm (5.4 in)
2007	57.4 mm (2.3 in)
2008	91.2 mm (3.6 in)
2009	78.7 mm (3.1 in)
2010	61.7 mm (2.4 in)
2011	58.4 mm (2.3 in)
2012	41.4 mm (1.6 in)
2013	79.2 mm (3.1 in)
2014	95.0 mm (3.7 in)
2015	76.2 mm (3.0 in)
2016	58.7 mm (2.3 in)
2017	75.9 mm (3.0 in)
2018	84.1 mm (3.3 in)
2019	135.4 mm (5.3 in)
2020	75.4 mm (3.0 in)
2021	90.9 mm (3.6 in)
2022	71.1 mm (2.8 in)
2023	58.4 mm (2.3 in)
2024	84.8 mm (3.3 in)
2025	132.1 mm (5.2 in)
2026	87.6 mm (3.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Plymouth Muni AP, 1996 to 2026. The record is 174.9 mm (6.9 in) in 2006, marked on the chart; the median year is 110.2 mm (4.3 in).

Wettest five days (Rx5day) at Plymouth Muni AP by year
Year	Wettest five days (Rx5day)
1996	n/a
1997	n/a
1998	148.2 mm (5.8 in)
1999	90.9 mm (3.6 in)
2000	126.9 mm (5.0 in)
2001	102.6 mm (4.0 in)
2002	74.2 mm (2.9 in)
2003	84.6 mm (3.3 in)
2004	99.3 mm (3.9 in)
2005	126.2 mm (5.0 in)
2006	174.9 mm (6.9 in)
2007	104.7 mm (4.1 in)
2008	127.0 mm (5.0 in)
2009	87.0 mm (3.4 in)
2010	148.0 mm (5.8 in)
2011	110.2 mm (4.3 in)
2012	66.1 mm (2.6 in)
2013	157.7 mm (6.2 in)
2014	110.2 mm (4.3 in)
2015	100.3 mm (3.9 in)
2016	58.7 mm (2.3 in)
2017	118.1 mm (4.6 in)
2018	86.9 mm (3.4 in)
2019	135.4 mm (5.3 in)
2020	91.2 mm (3.6 in)
2021	131.6 mm (5.2 in)
2022	110.5 mm (4.4 in)
2023	81.9 mm (3.2 in)
2024	123.7 mm (4.9 in)
2025	172.0 mm (6.8 in)
2026	137.5 mm (5.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Plymouth Muni AP, 1996 to 2026. The record is 33 days in 2021, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at Plymouth Muni AP by year
Year	Longest dry spell (CDD)
1996	n/a
1997	n/a
1998	17 days
1999	20 days
2000	11 days
2001	26 days
2002	17 days
2003	15 days
2004	13 days
2005	23 days
2006	25 days
2007	20 days
2008	17 days
2009	13 days
2010	12 days
2011	16 days
2012	19 days
2013	23 days
2014	17 days
2015	16 days
2016	11 days
2017	12 days
2018	14 days
2019	14 days
2020	23 days
2021	33 days
2022	17 days
2023	16 days
2024	15 days
2025	14 days
2026	22 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

29 years with a frost

Across 29 years with a frost, the median last spring frost at Plymouth Muni AP falls on 1 May and the median first autumn frost on 19 October, which leaves a median of 172 days between them.

Fitted over all years, the growing season changes by +14.2 days per decade at this station.

Frost dates and growing season at Plymouth Muni AP
Measure	Median, all years	Earliest period	Recent period (1997 to 2025)	Recent against earliest	Fitted trend
Last spring frost	1 May	n/a	1 May	n/a	-5.3 days per decade
First autumn frost	19 October	n/a	19 October	n/a	+8.9 days per decade
Growing days	172 days	n/a	172 days	n/a	+14.2 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.

Download the Data

Data for Plymouth Muni AP standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Plymouth Muni AP 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 2026-10-15 (15 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).