Grand Manan Weather Records (CA008101920)

Record envelope, standing records and threshold days for Grand Manan (CA008101920), New Brunswick, Canada, with 92 years of record.

Key Facts for Grand Manan

Grand Manan (CA008101920) is a weather station in New Brunswick, Canada at 44.73 latitude and -66.77 longitude, 8 m (26 ft) above sea level.
The station reports from 1874 to 1965, 92 years of record.
1,464 records set at Grand Manan still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Grand Manan set a daily record low maximum temperature of 0.0 C (32.0 F) on 29 March 1965.

About the Station

Location: New Brunswick, Canada, 44.73 latitude, -66.77 longitude.
Elevation: 8 m (26 ft).
Period of record: 1874 to 1965, 92 years.
Eligible elements: tmax, tmin, prcp, snow.

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 Grand Manan. 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 Grand Manan, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.1 C (61.0 F)	-30.6 C (-23.1 F)	n/a	n/a
Feb	15.0 C (59.0 F)	-25.0 C (-13.0 F)	n/a	n/a
Mar	15.6 C (60.1 F)	-23.9 C (-11.0 F)	n/a	n/a
Apr	23.9 C (75.0 F)	-10.6 C (12.9 F)	n/a	n/a
May	28.9 C (84.0 F)	-3.3 C (26.1 F)	n/a	n/a
Jun	32.8 C (91.0 F)	1.7 C (35.1 F)	n/a	n/a
Jul	33.3 C (91.9 F)	4.4 C (39.9 F)	n/a	n/a
Aug	32.2 C (90.0 F)	4.4 C (39.9 F)	n/a	n/a
Sep	31.7 C (89.1 F)	-1.7 C (28.9 F)	n/a	n/a
Oct	26.1 C (79.0 F)	-3.9 C (25.0 F)	n/a	n/a
Nov	18.3 C (64.9 F)	-16.7 C (1.9 F)	n/a	n/a
Dec	16.1 C (61.0 F)	-27.2 C (-17.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Grand Manan still stand. 1884 holds the most, with 67.

Standing records at Grand Manan by the year they were set
Year set	Standing records
1883	26
1884	67
1885	65
1886	53
1887	55
1888	57
1889	41
1890	43
1891	48
1892	44
1893	46
1894	43
1895	47
1896	41
1897	29
1898	41
1899	33
1900	59
1901	37
1902	33
1903	52
1904	41
1905	39
1906	44
1907	32
1908	54
1909	45
1910	26
1911	53
1912	16
1962	24
1963	67
1964	58
1965	5

Wettest Day of Each Month

Jun: 162.1 mm (6.4 in)

The wettest day on record for each calendar month at Grand Manan. The most was 162.1 mm (6.4 in) on 17 June 1910.

Record daily precipitation for each month at Grand Manan
Month	Record daily precipitation (mm)	Date
Jan	88.1 mm (3.5 in)	18 January 1891
Feb	58.4 mm (2.3 in)	1 February 1898
Mar	88.9 mm (3.5 in)	31 March 1878
Apr	52.8 mm (2.1 in)	24 April 1898
May	62.5 mm (2.5 in)	5 May 1903
Jun	162.1 mm (6.4 in)	17 June 1910
Jul	86.1 mm (3.4 in)	14 July 1883
Aug	78.0 mm (3.1 in)	21 August 1893
Sep	82.3 mm (3.2 in)	27 September 1909
Oct	136.1 mm (5.4 in)	11 October 1900
Nov	112.5 mm (4.4 in)	15 November 1895
Dec	71.9 mm (2.8 in)	3 December 1905

Period of Record Coverage

1883 to 1965

34 years of record at Grand Manan, 1883 to 1965. 4 years have data for under 90 percent of days and are left out of rankings: 1883, 1912, 1962, 1965.

Days with data per year at Grand Manan
Year	Days with data	Share of year	Complete
1883	177	48%	No
1884	366	100%	Yes
1885	365	100%	Yes
1886	365	100%	Yes
1887	365	100%	Yes
1888	366	100%	Yes
1889	365	100%	Yes
1890	364	100%	Yes
1891	365	100%	Yes
1892	366	100%	Yes
1893	365	100%	Yes
1894	365	100%	Yes
1895	365	100%	Yes
1896	366	100%	Yes
1897	365	100%	Yes
1898	365	100%	Yes
1899	365	100%	Yes
1900	365	100%	Yes
1901	365	100%	Yes
1902	365	100%	Yes
1903	365	100%	Yes
1904	366	100%	Yes
1905	365	100%	Yes
1906	365	100%	Yes
1907	365	100%	Yes
1908	366	100%	Yes
1909	365	100%	Yes
1910	365	100%	Yes
1911	365	100%	Yes
1912	121	33%	No
1962	163	45%	No
1963	357	98%	Yes
1964	363	99%	Yes
1965	90	25%	No

Latest Records

Latest records at Grand Manan
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 March 1965	Grand Manan, CA	daily low max	0.0 C (32.0 F)	0.6 C (1.1 F)	68 years	29 of 100 (Routine)
5 March 1965	Grand Manan, CA	daily high min	2.8 C (37.0 F)	2.2 C (4.0 F)	70 years	33 of 100 (Routine)
4 March 1965	Grand Manan, CA	daily high min	1.1 C (34.0 F)	2.8 C (5.0 F)	78 years	36 of 100 (Notable)
25 February 1965	Grand Manan, CA	daily rain	38.9 mm (1.5 in)	21.1 mm (0.8 in)	60 years	49 of 100 (Notable)
14 February 1965	Grand Manan, CA	daily low max	-10.0 C (14.0 F)	1.7 C (3.1 F)	64 years	30 of 100 (Routine)
24 January 1965	Grand Manan, CA	daily snowfall	15.2 cm (6.0 in)	5.0 cm (2.0 in)	79 years	39 of 100 (Notable)
15 January 1965	Grand Manan, CA	daily low min	-24.4 C (-11.9 F)	3.3 C (5.9 F)	60 years	31 of 100 (Routine)
9 January 1965	Grand Manan, CA	daily high min (Tie)	0.0 C (32.0 F)	tie	75 years	7 of 100 (Routine)
26 December 1964	Grand Manan, CA	daily rain	29.5 mm (1.2 in)	12.7 mm (0.5 in)	64 years	40 of 100 (Notable)
9 December 1964	Grand Manan, CA	daily snowfall	1.3 cm (0.5 in)	0.8 cm (0.3 in)	54 years	20 of 100 (Routine)
6 December 1964	Grand Manan, CA	daily snowfall	12.7 cm (5.0 in)	7.6 cm (3.0 in)	77 years	42 of 100 (Notable)
1 December 1964	Grand Manan, CA	daily snowfall	22.9 cm (9.0 in)	19.1 cm (7.5 in)	65 years	55 of 100 (Notable)
30 November 1964	Grand Manan, CA	daily snowfall	12.7 cm (5.0 in)	6.3 cm (2.5 in)	65 years	40 of 100 (Notable)
18 October 1964	Grand Manan, CA	daily rain	31.2 mm (1.2 in)	1.5 mm (0.06 in)	61 years	27 of 100 (Routine)
2 July 1964	Grand Manan, CA	daily rain	13.7 mm (0.5 in)	7.3 mm (0.29 in)	69 years	20 of 100 (Routine)
10 June 1964	Grand Manan, CA	daily rain	19.8 mm (0.8 in)	1.3 mm (0.05 in)	88 years	20 of 100 (Routine)
14 April 1964	Grand Manan, CA	daily rain	33.3 mm (1.3 in)	22.9 mm (0.9 in)	64 years	54 of 100 (Notable)
3 April 1964	Grand Manan, CA	daily rain	24.6 mm (1.0 in)	0.2 mm (0.01 in)	72 years	20 of 100 (Routine)
11 March 1964	Grand Manan, CA	daily snowfall	5.1 cm (2.0 in)	2.3 cm (0.9 in)	76 years	35 of 100 (Notable)
13 January 1964	Grand Manan, CA	daily snowfall (Tie)	10.2 cm (4.0 in)	tie	62 years	6 of 100 (Routine)

Climate Trend

29 complete years, 1884 to 1964

One stripe for each of 29 complete years at Grand Manan, 1884 to 1964. Blue stripes are years cooler than the station's own mean of 6.2 C (43.2 F); red stripes are warmer. The coolest year was 1888, at 4.8 C (40.7 F), and the warmest was 1910, at 7.2 C (44.9 F). The strongest colour marks a difference of 1.5 C (2.7 F).

Annual mean temperature at Grand Manan as warming stripes, 1884 to 1964
Year	Annual mean temperature	Difference from the station mean
1884	5.6 C	-0.61 C
1885	5.3 C	-0.97 C
1886	6.1 C	-0.19 C
1887	5.5 C	-0.76 C
1888	4.8 C	-1.41 C
1889	6.8 C	+0.50 C
1890	5.4 C	-0.84 C
1891	6.5 C	+0.21 C
1893	5.7 C	-0.51 C
1894	6.4 C	+0.13 C
1895	6.7 C	+0.49 C
1896	6.1 C	-0.16 C
1897	6.3 C	+0.07 C
1898	6.9 C	+0.65 C
1899	6.4 C	+0.19 C
1900	7.0 C	+0.76 C
1901	6.7 C	+0.45 C
1902	7.1 C	+0.83 C
1903	6.4 C	+0.19 C
1904	5.1 C	-1.16 C
1905	5.6 C	-0.62 C
1906	6.7 C	+0.43 C
1907	5.9 C	-0.36 C
1908	7.1 C	+0.86 C
1909	6.9 C	+0.66 C
1910	7.2 C	+0.92 C
1911	6.8 C	+0.50 C
1963	6.2 C	-0.05 C
1964	6.0 C	-0.23 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

1874 to 1965

Yearly extremes at Grand Manan: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	33.3 C (91.9 F)	1963	28.6 C (83.5 F)	34
Coldest night (TNn)	-30.6 C (-23.1 F)	1890	-23.0 C (-9.5 F)	34
Wettest day (Rx1day)	162.1 mm (6.4 in)	1910	59.5 mm (2.3 in)	38
Wettest five days (Rx5day)	271.0 mm (10.7 in)	1900	93.6 mm (3.7 in)	38
Longest dry spell (CDD)	32 days	1911	15 days	38

Hottest day (TXx)

The hottest day of the year at Grand Manan, 1874 to 1965. The record is 33.3 C (91.9 F) in 1963, marked on the chart; the median year is 28.6 C (83.5 F).

Hottest day (TXx) at Grand Manan by year
Year	Hottest day (TXx)
1874	n/a
1875	n/a
1877	n/a
1878	n/a
1883	27.2 C (81.0 F)
1884	30.6 C (87.1 F)
1885	25.6 C (78.1 F)
1886	30.6 C (87.1 F)
1887	30.0 C (86.0 F)
1888	30.0 C (86.0 F)
1889	27.8 C (82.0 F)
1890	25.6 C (78.1 F)
1891	27.2 C (81.0 F)
1892	29.4 C (84.9 F)
1893	30.6 C (87.1 F)
1894	30.6 C (87.1 F)
1895	27.8 C (82.0 F)
1896	28.9 C (84.0 F)
1897	30.0 C (86.0 F)
1898	31.7 C (89.1 F)
1899	27.8 C (82.0 F)
1900	32.2 C (90.0 F)
1901	31.1 C (88.0 F)
1902	28.3 C (82.9 F)
1903	27.8 C (82.0 F)
1904	28.3 C (82.9 F)
1905	28.3 C (82.9 F)
1906	31.1 C (88.0 F)
1907	28.3 C (82.9 F)
1908	31.1 C (88.0 F)
1909	30.6 C (87.1 F)
1910	27.2 C (81.0 F)
1911	28.9 C (84.0 F)
1912	15.0 C (59.0 F)
1962	25.6 C (78.1 F)
1963	33.3 C (91.9 F)
1964	26.7 C (80.1 F)
1965	10.0 C (50.0 F)

Coldest night (TNn)

The coldest night of the year at Grand Manan, 1874 to 1965. The record is -30.6 C (-23.1 F) in 1890, marked on the chart; the median year is -23.0 C (-9.5 F).

Coldest night (TNn) at Grand Manan by year
Year	Coldest night (TNn)
1874	n/a
1875	n/a
1877	n/a
1878	n/a
1883	-25.0 C (-13.0 F)
1884	-27.2 C (-17.0 F)
1885	-24.4 C (-11.9 F)
1886	-24.4 C (-11.9 F)
1887	-25.0 C (-13.0 F)
1888	-23.3 C (-9.9 F)
1889	-23.9 C (-11.0 F)
1890	-30.6 C (-23.1 F)
1891	-22.2 C (-8.0 F)
1892	-20.6 C (-5.1 F)
1893	-21.1 C (-6.0 F)
1894	-24.4 C (-11.9 F)
1895	-22.8 C (-9.0 F)
1896	-25.0 C (-13.0 F)
1897	-24.4 C (-11.9 F)
1898	-21.7 C (-7.1 F)
1899	-21.1 C (-6.0 F)
1900	-22.2 C (-8.0 F)
1901	-23.9 C (-11.0 F)
1902	-26.1 C (-15.0 F)
1903	-23.9 C (-11.0 F)
1904	-23.3 C (-9.9 F)
1905	-21.1 C (-6.0 F)
1906	-21.1 C (-6.0 F)
1907	-22.8 C (-9.0 F)
1908	-23.9 C (-11.0 F)
1909	-19.4 C (-2.9 F)
1910	-20.0 C (-4.0 F)
1911	-22.8 C (-9.0 F)
1912	-22.8 C (-9.0 F)
1962	-18.9 C (-2.0 F)
1963	-21.7 C (-7.1 F)
1964	-21.7 C (-7.1 F)
1965	-24.4 C (-11.9 F)

Wettest day (Rx1day)

The wettest day of the year at Grand Manan, 1874 to 1965. The record is 162.1 mm (6.4 in) in 1910, marked on the chart; the median year is 59.5 mm (2.3 in).

Wettest day (Rx1day) at Grand Manan by year
Year	Wettest day (Rx1day)
1874	21.6 mm (0.9 in)
1875	41.4 mm (1.6 in)
1877	59.2 mm (2.3 in)
1878	88.9 mm (3.5 in)
1883	86.1 mm (3.4 in)
1884	55.4 mm (2.2 in)
1885	47.0 mm (1.9 in)
1886	45.0 mm (1.8 in)
1887	65.0 mm (2.6 in)
1888	75.7 mm (3.0 in)
1889	49.8 mm (2.0 in)
1890	41.9 mm (1.6 in)
1891	88.1 mm (3.5 in)
1892	52.6 mm (2.1 in)
1893	78.0 mm (3.1 in)
1894	41.1 mm (1.6 in)
1895	112.5 mm (4.4 in)
1896	93.5 mm (3.7 in)
1897	50.3 mm (2.0 in)
1898	69.6 mm (2.7 in)
1899	66.5 mm (2.6 in)
1900	136.1 mm (5.4 in)
1901	74.9 mm (2.9 in)
1902	69.1 mm (2.7 in)
1903	62.5 mm (2.5 in)
1904	54.6 mm (2.1 in)
1905	71.9 mm (2.8 in)
1906	54.9 mm (2.2 in)
1907	52.3 mm (2.1 in)
1908	57.2 mm (2.3 in)
1909	82.3 mm (3.2 in)
1910	162.1 mm (6.4 in)
1911	44.5 mm (1.8 in)
1912	40.4 mm (1.6 in)
1962	59.7 mm (2.4 in)
1963	63.8 mm (2.5 in)
1964	49.3 mm (1.9 in)
1965	38.9 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Grand Manan, 1874 to 1965. The record is 271.0 mm (10.7 in) in 1900, marked on the chart; the median year is 93.6 mm (3.7 in).

Wettest five days (Rx5day) at Grand Manan by year
Year	Wettest five days (Rx5day)
1874	22.9 mm (0.9 in)
1875	72.4 mm (2.9 in)
1877	61.7 mm (2.4 in)
1878	120.7 mm (4.8 in)
1883	86.1 mm (3.4 in)
1884	114.8 mm (4.5 in)
1885	87.4 mm (3.4 in)
1886	98.3 mm (3.9 in)
1887	102.1 mm (4.0 in)
1888	84.9 mm (3.3 in)
1889	69.4 mm (2.7 in)
1890	58.1 mm (2.3 in)
1891	107.7 mm (4.2 in)
1892	76.4 mm (3.0 in)
1893	96.8 mm (3.8 in)
1894	61.7 mm (2.4 in)
1895	125.4 mm (4.9 in)
1896	116.1 mm (4.6 in)
1897	74.4 mm (2.9 in)
1898	90.4 mm (3.6 in)
1899	75.2 mm (3.0 in)
1900	271.0 mm (10.7 in)
1901	101.1 mm (4.0 in)
1902	159.3 mm (6.3 in)
1903	119.4 mm (4.7 in)
1904	114.7 mm (4.5 in)
1905	122.5 mm (4.8 in)
1906	100.6 mm (4.0 in)
1907	71.1 mm (2.8 in)
1908	73.6 mm (2.9 in)
1909	176.3 mm (6.9 in)
1910	163.4 mm (6.4 in)
1911	52.4 mm (2.1 in)
1912	85.6 mm (3.4 in)
1962	96.9 mm (3.8 in)
1963	116.2 mm (4.6 in)
1964	87.9 mm (3.5 in)
1965	50.1 mm (2.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Grand Manan, 1874 to 1965. The record is 32 days in 1911, marked on the chart; the median year is 15 days.

Longest dry spell (CDD) at Grand Manan by year
Year	Longest dry spell (CDD)
1874	9 days
1875	15 days
1877	7 days
1878	18 days
1883	20 days
1884	10 days
1885	19 days
1886	27 days
1887	16 days
1888	14 days
1889	21 days
1890	16 days
1891	27 days
1892	25 days
1893	12 days
1894	13 days
1895	18 days
1896	17 days
1897	15 days
1898	22 days
1899	17 days
1900	14 days
1901	15 days
1902	13 days
1903	20 days
1904	14 days
1905	13 days
1906	23 days
1907	15 days
1908	21 days
1909	13 days
1910	17 days
1911	32 days
1912	8 days
1962	13 days
1963	14 days
1964	15 days
1965	11 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 Grand Manan falls on 2 May and the median first autumn frost on 23 October, which leaves a median of 177 days between them.

Fitted over all years, the growing season changes by -5.4 days per decade at this station.

Frost dates and growing season at Grand Manan
Measure	Median, all years	Earliest period	Recent period (1884 to 1964)	Recent against earliest	Fitted trend
Last spring frost	2 May	n/a	2 May	n/a	+1.7 days per decade
First autumn frost	23 October	n/a	23 October	n/a	-3.7 days per decade
Growing days	177 days	n/a	177 days	n/a	-5.4 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

30 years, 1884 to 1964

A day with at least 60.8 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 189.5 mm (7.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Grand Manan: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	60.8 mm (2.4 in)
5 years	81.8 mm (3.2 in)
10 years	100.0 mm (3.9 in)
25 years	129.2 mm (5.1 in)
50 years	156.5 mm (6.2 in)	Longer than the 30 years of record
100 years	189.5 mm (7.5 in)	Longer than the 30 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, 30 years of values from 1884 to 1964.

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: 162.1 mm (6.4 in) in 1910; 136.1 mm (5.4 in) in 1900; 112.5 mm (4.4 in) in 1895.

Download the Data

Data for Grand Manan standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Grand Manan 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).