Falmouth Otis AFB Weather Records (USW00014704)

Record envelope, standing records and threshold days for Falmouth Otis AFB (USW00014704), Massachusetts, United States, with 78 years of record.

Key Facts for Falmouth Otis AFB

Falmouth Otis AFB (USW00014704) is a weather station in Massachusetts, United States at 41.65 latitude and -70.52 longitude, 40 m (131 ft) above sea level.
The station reports from 1949 to 2026, 78 years of record.
1,464 records set at Falmouth Otis AFB 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, 41.65 latitude, -70.52 longitude.
Elevation: 40 m (131 ft).
Period of record: 1949 to 2026, 78 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

29 days at or beyond a record

The band shows the record high and record low for each calendar day at Falmouth Otis AFB. The lines show the 2026 daily maximum and minimum. 29 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Falmouth Otis AFB, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	15.6 C (60.1 F)	-24.4 C (-11.9 F)	11.0 C (51.8 F)	-16.0 C (3.2 F)
Feb	15.0 C (59.0 F)	-22.8 C (-9.0 F)	13.0 C (55.4 F)	-16.0 C (3.2 F)
Mar	20.0 C (68.0 F)	-17.2 C (1.0 F)	19.0 C (66.2 F)	-11.0 C (12.2 F)
Apr	26.1 C (79.0 F)	-7.2 C (19.0 F)	22.0 C (71.6 F)	-4.0 C (24.8 F)
May	30.0 C (86.0 F)	-2.2 C (28.0 F)	25.0 C (77.0 F)	2.0 C (35.6 F)
Jun	36.1 C (97.0 F)	5.0 C (41.0 F)	35.0 C (95.0 F)	11.0 C (51.8 F)
Jul	35.6 C (96.1 F)	8.3 C (46.9 F)	34.0 C (93.2 F)	11.0 C (51.8 F)
Aug	37.2 C (99.0 F)	6.7 C (44.1 F)	32.0 C (89.6 F)	8.0 C (46.4 F)
Sep	32.8 C (91.0 F)	2.2 C (36.0 F)	n/a	n/a
Oct	27.8 C (82.0 F)	-5.6 C (21.9 F)	n/a	n/a
Nov	23.3 C (73.9 F)	-10.0 C (14.0 F)	n/a	n/a
Dec	18.3 C (64.9 F)	-20.0 C (-4.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Falmouth Otis AFB still stand. 1949 holds the most, with 92.

Standing records at Falmouth Otis AFB by the year they were set
Year set	Standing records
1949	92
1950	75
1951	72
1952	42
1953	86
1954	66
1955	68
1956	68
1957	51
1958	44
1959	73
1960	43
1961	56
1962	69
1963	52
1964	55
1965	67
1966	53
1967	80
1968	74
1969	41
1970	65
2006	1
2008	4
2025	67

Wettest Day of Each Month

Mar: 118.1 mm (4.6 in)

The wettest day on record for each calendar month at Falmouth Otis AFB. The most was 118.1 mm (4.6 in) on 18 March 1968.

Record daily precipitation for each month at Falmouth Otis AFB
Month	Record daily precipitation (mm)	Date
Jan	68.8 mm (2.7 in)	6 January 1962
Feb	55.9 mm (2.2 in)	12 February 1963
Mar	118.1 mm (4.6 in)	18 March 1968
Apr	88.9 mm (3.5 in)	1 April 1962
May	85.6 mm (3.4 in)	25 May 1967
Jun	84.8 mm (3.3 in)	7 June 2006
Jul	97.8 mm (3.9 in)	15 July 1959
Aug	101.6 mm (4.0 in)	6 August 1952
Sep	116.1 mm (4.6 in)	20 September 1960
Oct	80.5 mm (3.2 in)	23 October 1970
Nov	78.0 mm (3.1 in)	4 November 2007
Dec	72.4 mm (2.9 in)	16 December 1960

Period of Record Coverage

1949 to 2025

28 years of record at Falmouth Otis AFB, 1949 to 2025. 7 years have data for under 90 percent of days and are left out of rankings: 1969, 2006, 2007, 2008, 2009, 2010, 2025.

Days with data per year at Falmouth Otis AFB
Year	Days with data	Share of year	Complete
1949	364	100%	Yes
1950	363	99%	Yes
1951	364	100%	Yes
1952	364	99%	Yes
1953	365	100%	Yes
1954	363	99%	Yes
1955	364	100%	Yes
1956	363	99%	Yes
1957	364	100%	Yes
1958	364	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	365	100%	Yes
1965	364	100%	Yes
1966	361	99%	Yes
1967	360	99%	Yes
1968	365	100%	Yes
1969	304	83%	No
1970	364	100%	Yes
2006	22	6%	No
2007	23	6%	No
2008	38	10%	No
2009	12	3%	No
2010	12	3%	No
2025	228	62%	No

Latest Records

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

Climate Trend

21 complete years, 1949 to 1970

One stripe for each of 21 complete years at Falmouth Otis AFB, 1949 to 1970. Blue stripes are years cooler than the station's own mean of 9.9 C (49.8 F); red stripes are warmer. The coolest year was 1970, at 8.7 C (47.7 F), and the warmest was 1953, at 11.2 C (52.1 F). The strongest colour marks a difference of 1.4 C (2.5 F).

Annual mean temperature at Falmouth Otis AFB as warming stripes, 1949 to 1970
Year	Annual mean temperature	Difference from the station mean
1949	11.1 C	+1.23 C
1950	9.9 C	-0.02 C
1951	10.5 C	+0.67 C
1952	10.7 C	+0.81 C
1953	11.2 C	+1.32 C
1954	10.3 C	+0.43 C
1955	9.9 C	+0.04 C
1956	9.7 C	-0.22 C
1957	10.6 C	+0.68 C
1958	9.3 C	-0.60 C
1959	10.1 C	+0.27 C
1960	9.8 C	-0.05 C
1961	9.8 C	-0.06 C
1962	8.9 C	-1.00 C
1963	9.5 C	-0.38 C
1964	9.9 C	-0.01 C
1965	9.5 C	-0.33 C
1966	9.8 C	-0.10 C
1967	8.8 C	-1.12 C
1968	9.4 C	-0.45 C
1970	8.7 C	-1.15 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

1949 to 2026

Yearly extremes at Falmouth Otis AFB: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.2 C (99.0 F)	1949	31.1 C (88.0 F)	29
Coldest night (TNn)	-24.4 C (-11.9 F)	1970	-16.0 C (3.2 F)	29
Wettest day (Rx1day)	118.1 mm (4.6 in)	1968	79.5 mm (3.1 in)	27
Wettest five days (Rx5day)	190.5 mm (7.5 in)	1955	117.4 mm (4.6 in)	27
Longest dry spell (CDD)	40 days	1957	17 days	27

Hottest day (TXx)

The hottest day of the year at Falmouth Otis AFB, 1949 to 2026. The record is 37.2 C (99.0 F) in 1949, marked on the chart; the median year is 31.1 C (88.0 F).

Hottest day (TXx) at Falmouth Otis AFB by year
Year	Hottest day (TXx)
1949	37.2 C (99.0 F)
1950	30.6 C (87.1 F)
1951	30.6 C (87.1 F)
1952	36.1 C (97.0 F)
1953	33.9 C (93.0 F)
1954	31.1 C (88.0 F)
1955	33.3 C (91.9 F)
1956	32.2 C (90.0 F)
1957	32.2 C (90.0 F)
1958	31.1 C (88.0 F)
1959	33.3 C (91.9 F)
1960	28.9 C (84.0 F)
1961	30.6 C (87.1 F)
1962	28.3 C (82.9 F)
1963	33.9 C (93.0 F)
1964	35.0 C (95.0 F)
1965	31.7 C (89.1 F)
1966	31.1 C (88.0 F)
1967	30.0 C (86.0 F)
1968	32.8 C (91.0 F)
1969	33.3 C (91.9 F)
1970	30.0 C (86.0 F)
2006	27.8 C (82.0 F)
2007	27.2 C (81.0 F)
2008	26.1 C (79.0 F)
2009	22.2 C (72.0 F)
2010	27.8 C (82.0 F)
2025	35.0 C (95.0 F)
2026	33.0 C (91.4 F)

Coldest night (TNn)

The coldest night of the year at Falmouth Otis AFB, 1949 to 2026. The record is -24.4 C (-11.9 F) in 1970, marked on the chart; the median year is -16.0 C (3.2 F).

Coldest night (TNn) at Falmouth Otis AFB by year
Year	Coldest night (TNn)
1949	-14.4 C (6.1 F)
1950	-18.3 C (-0.9 F)
1951	-12.8 C (9.0 F)
1952	-14.4 C (6.1 F)
1953	-12.2 C (10.0 F)
1954	-17.8 C (0.0 F)
1955	-18.9 C (-2.0 F)
1956	-14.4 C (6.1 F)
1957	-21.7 C (-7.1 F)
1958	-18.9 C (-2.0 F)
1959	-17.2 C (1.0 F)
1960	-13.3 C (8.1 F)
1961	-22.8 C (-9.0 F)
1962	-20.0 C (-4.0 F)
1963	-16.7 C (1.9 F)
1964	-16.7 C (1.9 F)
1965	-18.3 C (-0.9 F)
1966	-15.6 C (3.9 F)
1967	-20.0 C (-4.0 F)
1968	-20.0 C (-4.0 F)
1969	-12.2 C (10.0 F)
1970	-24.4 C (-11.9 F)
2006	-9.4 C (15.1 F)
2007	-2.2 C (28.0 F)
2008	-7.8 C (18.0 F)
2009	-6.1 C (21.0 F)
2010	-3.3 C (26.1 F)
2025	-16.0 C (3.2 F)
2026	-6.0 C (21.2 F)

Wettest day (Rx1day)

The wettest day of the year at Falmouth Otis AFB, 1949 to 2026. The record is 118.1 mm (4.6 in) in 1968, marked on the chart; the median year is 79.5 mm (3.1 in).

Wettest day (Rx1day) at Falmouth Otis AFB by year
Year	Wettest day (Rx1day)
1949	30.0 mm (1.2 in)
1950	51.3 mm (2.0 in)
1951	51.3 mm (2.0 in)
1952	101.6 mm (4.0 in)
1953	82.8 mm (3.3 in)
1954	63.5 mm (2.5 in)
1955	83.3 mm (3.3 in)
1956	53.6 mm (2.1 in)
1957	40.9 mm (1.6 in)
1958	62.2 mm (2.4 in)
1959	97.8 mm (3.9 in)
1960	116.1 mm (4.6 in)
1961	79.5 mm (3.1 in)
1962	88.9 mm (3.5 in)
1963	77.0 mm (3.0 in)
1964	77.7 mm (3.1 in)
1965	49.3 mm (1.9 in)
1966	80.3 mm (3.2 in)
1967	85.6 mm (3.4 in)
1968	118.1 mm (4.6 in)
1969	72.6 mm (2.9 in)
1970	80.5 mm (3.2 in)
2006	84.8 mm (3.3 in)
2007	82.5 mm (3.2 in)
2008	71.1 mm (2.8 in)
2009	82.0 mm (3.2 in)
2010	58.2 mm (2.3 in)
2025	n/a
2026	n/a

Wettest five days (Rx5day)

The wettest five days of the year at Falmouth Otis AFB, 1949 to 2026. The record is 190.5 mm (7.5 in) in 1955, marked on the chart; the median year is 117.4 mm (4.6 in).

Wettest five days (Rx5day) at Falmouth Otis AFB by year
Year	Wettest five days (Rx5day)
1949	56.1 mm (2.2 in)
1950	75.7 mm (3.0 in)
1951	73.2 mm (2.9 in)
1952	174.0 mm (6.9 in)
1953	130.6 mm (5.1 in)
1954	83.5 mm (3.3 in)
1955	190.5 mm (7.5 in)
1956	75.2 mm (3.0 in)
1957	63.5 mm (2.5 in)
1958	137.1 mm (5.4 in)
1959	163.2 mm (6.4 in)
1960	131.4 mm (5.2 in)
1961	129.7 mm (5.1 in)
1962	153.1 mm (6.0 in)
1963	97.4 mm (3.8 in)
1964	117.4 mm (4.6 in)
1965	63.2 mm (2.5 in)
1966	101.1 mm (4.0 in)
1967	146.3 mm (5.8 in)
1968	176.7 mm (7.0 in)
1969	96.0 mm (3.8 in)
1970	136.2 mm (5.4 in)
2006	173.2 mm (6.8 in)
2007	101.6 mm (4.0 in)
2008	142.8 mm (5.6 in)
2009	100.6 mm (4.0 in)
2010	89.0 mm (3.5 in)
2025	n/a
2026	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Falmouth Otis AFB, 1949 to 2026. The record is 40 days in 1957, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at Falmouth Otis AFB by year
Year	Longest dry spell (CDD)
1949	37 days
1950	17 days
1951	18 days
1952	32 days
1953	21 days
1954	14 days
1955	17 days
1956	16 days
1957	40 days
1958	14 days
1959	29 days
1960	18 days
1961	17 days
1962	14 days
1963	20 days
1964	20 days
1965	21 days
1966	12 days
1967	16 days
1968	19 days
1969	22 days
1970	17 days
2006	6 days
2007	7 days
2008	6 days
2009	7 days
2010	5 days
2025	n/a
2026	n/a

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

21 years with a frost

Across 21 years with a frost, the median last spring frost at Falmouth Otis AFB falls on 16 April and the median first autumn frost on 27 October, which leaves a median of 195 days between them.

Frost dates and growing season at Falmouth Otis AFB
Measure	Median, all years	Earliest period	Recent period (1949 to 1970)	Recent against earliest	Fitted trend
Last spring frost	16 April	n/a	16 April	n/a	n/a
First autumn frost	27 October	n/a	27 October	n/a	n/a
Growing days	195 days	n/a	195 days	n/a	n/a

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 Falmouth Otis AFB standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Falmouth Otis AFB 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).