Lake Megantic Weather Records (CA007023800)

Record envelope, standing records and threshold days for Lake Megantic (CA007023800), Quebec, Canada, with 35 years of record.

Key Facts for Lake Megantic

Lake Megantic (CA007023800) is a weather station in Quebec, Canada at 45.60 latitude and -70.88 longitude, 401 m (1,316 ft) above sea level.
The station reports from 1913 to 1947, 35 years of record.
1,464 records set at Lake Megantic still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Lake Megantic set a daily record precipitation of 25.9 mm (1.0 in) on 23 July 1947.

About the Station

Location: Quebec, Canada, 45.60 latitude, -70.88 longitude.
Elevation: 401 m (1,316 ft).
Period of record: 1913 to 1947, 35 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 Lake Megantic. 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 Lake Megantic, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	11.1 C (52.0 F)	-38.9 C (-38.0 F)	n/a	n/a
Feb	17.8 C (64.0 F)	-38.9 C (-38.0 F)	n/a	n/a
Mar	23.9 C (75.0 F)	-37.2 C (-35.0 F)	n/a	n/a
Apr	27.8 C (82.0 F)	-19.4 C (-2.9 F)	n/a	n/a
May	30.0 C (86.0 F)	-8.9 C (16.0 F)	n/a	n/a
Jun	34.4 C (93.9 F)	-1.7 C (28.9 F)	n/a	n/a
Jul	35.0 C (95.0 F)	0.0 C (32.0 F)	n/a	n/a
Aug	35.6 C (96.1 F)	0.6 C (33.1 F)	n/a	n/a
Sep	30.6 C (87.1 F)	-9.4 C (15.1 F)	n/a	n/a
Oct	26.1 C (79.0 F)	-12.2 C (10.0 F)	n/a	n/a
Nov	20.0 C (68.0 F)	-23.3 C (-9.9 F)	n/a	n/a
Dec	17.8 C (64.0 F)	-38.9 C (-38.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Lake Megantic still stand. 1914 holds the most, with 76.

Standing records at Lake Megantic by the year they were set
Year set	Standing records
1913	2
1914	76
1915	37
1916	46
1917	44
1918	68
1919	39
1920	46
1921	76
1922	39
1923	58
1924	33
1925	32
1926	35
1927	39
1928	29
1929	54
1930	38
1931	36
1932	40
1933	57
1934	59
1935	45
1936	55
1937	28
1938	40
1939	29
1940	38
1941	31
1942	40
1943	32
1944	41
1945	39
1946	48
1947	15

All-Time Record Progression

1 new records

1 all-time records were set at Lake Megantic between 6 January 1944 and 6 January 1944. Each dot is a new record.

Wettest Day of Each Month

Jun: 82.6 mm (3.3 in)

The wettest day on record for each calendar month at Lake Megantic. The most was 82.6 mm (3.3 in) on 17 June 1917.

Record daily precipitation for each month at Lake Megantic
Month	Record daily precipitation (mm)	Date
Jan	58.4 mm (2.3 in)	6 January 1944
Feb	48.3 mm (1.9 in)	13 February 1923
Mar	38.1 mm (1.5 in)	9 March 1916
Apr	48.0 mm (1.9 in)	8 April 1914
May	73.7 mm (2.9 in)	27 May 1933
Jun	82.6 mm (3.3 in)	17 June 1917
Jul	63.5 mm (2.5 in)	31 July 1917
Aug	41.9 mm (1.6 in)	10 August 1915
Sep	53.8 mm (2.1 in)	10 September 1942
Oct	77.2 mm (3.0 in)	23 October 1927
Nov	45.7 mm (1.8 in)	19 November 1932
Dec	45.7 mm (1.8 in)	4 December 1942

Period of Record Coverage

1913 to 1947

35 years of record at Lake Megantic, 1913 to 1947. 2 years have data for under 90 percent of days and are left out of rankings: 1913, 1947.

Days with data per year at Lake Megantic
Year	Days with data	Share of year	Complete
1913	19	5%	No
1914	365	100%	Yes
1915	365	100%	Yes
1916	366	100%	Yes
1917	364	100%	Yes
1918	364	100%	Yes
1919	364	100%	Yes
1920	366	100%	Yes
1921	365	100%	Yes
1922	365	100%	Yes
1923	363	99%	Yes
1924	366	100%	Yes
1925	364	100%	Yes
1926	363	99%	Yes
1927	349	96%	Yes
1928	364	99%	Yes
1929	363	99%	Yes
1930	364	100%	Yes
1931	360	99%	Yes
1932	366	100%	Yes
1933	364	100%	Yes
1934	363	99%	Yes
1935	365	100%	Yes
1936	365	100%	Yes
1937	333	91%	Yes
1938	363	99%	Yes
1939	364	100%	Yes
1940	365	100%	Yes
1941	362	99%	Yes
1942	365	100%	Yes
1943	364	100%	Yes
1944	364	99%	Yes
1945	365	100%	Yes
1946	364	100%	Yes
1947	212	58%	No

Latest Records

Latest records at Lake Megantic
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 July 1947	Lake Megantic, CA	daily rain	25.9 mm (1.0 in)	10.7 mm (0.4 in)	14 years	19 of 100 (Routine)
22 July 1947	Lake Megantic, CA	daily rain	38.1 mm (1.5 in)	24.1 mm (0.9 in)	20 years	36 of 100 (Notable)
23 June 1947	Lake Megantic, CA	daily high max	31.1 C (88.0 F)	1.7 C (3.1 F)	25 years	13 of 100 (Routine)
14 June 1947	Lake Megantic, CA	daily rain	24.4 mm (1.0 in)	8.9 mm (0.35 in)	8 years	12 of 100 (Routine)
11 June 1947	Lake Megantic, CA	daily high max	31.1 C (88.0 F)	1.1 C (2.0 F)	4 years	6 of 100 (Routine)
3 June 1947	Lake Megantic, CA	daily low max	10.0 C (50.0 F)	1.7 C (3.1 F)	17 years	11 of 100 (Routine)
2 June 1947	Lake Megantic, CA	daily rain	31.8 mm (1.3 in)	17.8 mm (0.7 in)	5 years	19 of 100 (Routine)
29 May 1947	Lake Megantic, CA	daily rain	19.1 mm (0.8 in)	9.7 mm (0.38 in)	5 years	16 of 100 (Routine)
10 May 1947	Lake Megantic, CA	daily low min (Tie)	-2.2 C (28.0 F)	tie	14 years	1 of 100 (Routine)
9 May 1947	Lake Megantic, CA	monthly low min	-8.9 C (16.0 F)	1.1 C (2.0 F)	29 years	23 of 100 (Routine)
9 May 1947	Lake Megantic, CA	daily low max	1.1 C (34.0 F)	2.8 C (5.0 F)	17 years	12 of 100 (Routine)
8 May 1947	Lake Megantic, CA	daily low max (Tie)	4.4 C (39.9 F)	tie	20 years	2 of 100 (Routine)
8 May 1947	Lake Megantic, CA	daily snowfall (Tie)	1.3 cm (0.5 in)	tie	17 years	2 of 100 (Routine)
7 May 1947	Lake Megantic, CA	daily snowfall	1.8 cm (0.7 in)	1.8 cm (0.7 in)	32 years	15 of 100 (Routine)
7 May 1947	Lake Megantic, CA	daily rain	15.7 mm (0.6 in)	4.8 mm (0.19 in)	8 years	11 of 100 (Routine)
6 May 1947	Lake Megantic, CA	daily rain	26.4 mm (1.0 in)	13.2 mm (0.5 in)	12 years	23 of 100 (Routine)
1 May 1947	Lake Megantic, CA	daily low max	1.7 C (35.1 F)	0.5 C (0.9 F)	12 years	6 of 100 (Routine)
29 April 1947	Lake Megantic, CA	daily low min	-13.3 C (8.1 F)	6.6 C (11.9 F)	12 years	18 of 100 (Routine)
28 April 1947	Lake Megantic, CA	daily low min	-11.7 C (10.9 F)	2.3 C (4.1 F)	16 years	11 of 100 (Routine)
28 April 1947	Lake Megantic, CA	daily low max	-1.1 C (30.0 F)	2.2 C (4.0 F)	12 years	9 of 100 (Routine)

Climate Trend

25 complete years, 1915 to 1946

One stripe for each of 25 complete years at Lake Megantic, 1915 to 1946. Blue stripes are years cooler than the station's own mean of 3.7 C (38.6 F); red stripes are warmer. The coolest year was 1917, at 2.0 C (35.5 F), and the warmest was 1946, at 5.2 C (41.3 F). The strongest colour marks a difference of 1.7 C (3.1 F).

Annual mean temperature at Lake Megantic as warming stripes, 1915 to 1946
Year	Annual mean temperature	Difference from the station mean
1915	4.3 C	+0.61 C
1916	3.9 C	+0.21 C
1917	2.0 C	-1.70 C
1918	3.3 C	-0.33 C
1919	3.9 C	+0.22 C
1920	3.7 C	+0.05 C
1921	5.0 C	+1.32 C
1922	3.8 C	+0.15 C
1923	2.7 C	-0.95 C
1924	2.7 C	-0.99 C
1926	2.0 C	-1.70 C
1927	4.3 C	+0.63 C
1928	3.7 C	+0.06 C
1931	4.9 C	+1.20 C
1932	4.2 C	+0.55 C
1934	3.4 C	-0.31 C
1935	3.4 C	-0.31 C
1936	3.5 C	-0.18 C
1938	3.9 C	+0.25 C
1939	2.8 C	-0.90 C
1940	2.6 C	-1.11 C
1941	4.4 C	+0.68 C
1942	4.8 C	+1.15 C
1943	3.5 C	-0.14 C
1946	5.2 C	+1.50 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

1913 to 1947

Yearly extremes at Lake Megantic: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	35.6 C (96.1 F)	1916	31.1 C (88.0 F)	35
Coldest night (TNn)	-38.9 C (-38.0 F)	1925	-32.8 C (-27.0 F)	34
Wettest day (Rx1day)	82.6 mm (3.3 in)	1917	45.5 mm (1.8 in)	35
Wettest five days (Rx5day)	161.4 mm (6.4 in)	1917	69.1 mm (2.7 in)	35
Longest dry spell (CDD)	31 days	1930	14 days	35

Hottest day (TXx)

The hottest day of the year at Lake Megantic, 1913 to 1947. The record is 35.6 C (96.1 F) in 1916, marked on the chart; the median year is 31.1 C (88.0 F).

Hottest day (TXx) at Lake Megantic by year
Year	Hottest day (TXx)
1913	8.3 C (46.9 F)
1914	31.7 C (89.1 F)
1915	29.4 C (84.9 F)
1916	35.6 C (96.1 F)
1917	32.2 C (90.0 F)
1918	32.2 C (90.0 F)
1919	34.4 C (93.9 F)
1920	31.1 C (88.0 F)
1921	35.0 C (95.0 F)
1922	30.6 C (87.1 F)
1923	31.1 C (88.0 F)
1924	28.3 C (82.9 F)
1925	32.2 C (90.0 F)
1926	27.8 C (82.0 F)
1927	27.8 C (82.0 F)
1928	29.4 C (84.9 F)
1929	29.4 C (84.9 F)
1930	29.4 C (84.9 F)
1931	32.2 C (90.0 F)
1932	28.3 C (82.9 F)
1933	33.3 C (91.9 F)
1934	30.6 C (87.1 F)
1935	33.3 C (91.9 F)
1936	27.8 C (82.0 F)
1937	31.1 C (88.0 F)
1938	31.1 C (88.0 F)
1939	30.6 C (87.1 F)
1940	28.9 C (84.0 F)
1941	30.0 C (86.0 F)
1942	31.7 C (89.1 F)
1943	32.2 C (90.0 F)
1944	33.3 C (91.9 F)
1945	31.7 C (89.1 F)
1946	33.3 C (91.9 F)
1947	31.1 C (88.0 F)

Coldest night (TNn)

The coldest night of the year at Lake Megantic, 1913 to 1947. The record is -38.9 C (-38.0 F) in 1925, marked on the chart; the median year is -32.8 C (-27.0 F).

Coldest night (TNn) at Lake Megantic by year
Year	Coldest night (TNn)
1913	n/a
1914	-35.0 C (-31.0 F)
1915	-30.6 C (-23.1 F)
1916	-30.6 C (-23.1 F)
1917	-35.6 C (-32.1 F)
1918	-35.6 C (-32.1 F)
1919	-30.0 C (-22.0 F)
1920	-37.2 C (-35.0 F)
1921	-28.9 C (-20.0 F)
1922	-32.8 C (-27.0 F)
1923	-32.2 C (-26.0 F)
1924	-33.3 C (-27.9 F)
1925	-38.9 C (-38.0 F)
1926	-30.0 C (-22.0 F)
1927	-30.6 C (-23.1 F)
1928	-28.3 C (-18.9 F)
1929	-31.7 C (-25.1 F)
1930	-37.2 C (-35.0 F)
1931	-31.7 C (-25.1 F)
1932	-26.7 C (-16.1 F)
1933	-38.9 C (-38.0 F)
1934	-38.9 C (-38.0 F)
1935	-35.6 C (-32.1 F)
1936	-32.8 C (-27.0 F)
1937	-28.3 C (-18.9 F)
1938	-37.2 C (-35.0 F)
1939	-28.3 C (-18.9 F)
1940	-30.6 C (-23.1 F)
1941	-33.9 C (-29.0 F)
1942	-33.3 C (-27.9 F)
1943	-33.3 C (-27.9 F)
1944	-33.3 C (-27.9 F)
1945	-34.4 C (-29.9 F)
1946	-31.7 C (-25.1 F)
1947	-26.1 C (-15.0 F)

Wettest day (Rx1day)

The wettest day of the year at Lake Megantic, 1913 to 1947. The record is 82.6 mm (3.3 in) in 1917, marked on the chart; the median year is 45.5 mm (1.8 in).

Wettest day (Rx1day) at Lake Megantic by year
Year	Wettest day (Rx1day)
1913	27.9 mm (1.1 in)
1914	48.0 mm (1.9 in)
1915	41.9 mm (1.6 in)
1916	38.1 mm (1.5 in)
1917	82.6 mm (3.3 in)
1918	50.8 mm (2.0 in)
1919	59.7 mm (2.4 in)
1920	30.5 mm (1.2 in)
1921	50.8 mm (2.0 in)
1922	45.7 mm (1.8 in)
1923	64.5 mm (2.5 in)
1924	40.9 mm (1.6 in)
1925	50.8 mm (2.0 in)
1926	38.1 mm (1.5 in)
1927	77.2 mm (3.0 in)
1928	35.6 mm (1.4 in)
1929	41.4 mm (1.6 in)
1930	31.8 mm (1.3 in)
1931	45.7 mm (1.8 in)
1932	45.7 mm (1.8 in)
1933	75.9 mm (3.0 in)
1934	39.4 mm (1.6 in)
1935	33.0 mm (1.3 in)
1936	38.6 mm (1.5 in)
1937	38.6 mm (1.5 in)
1938	53.3 mm (2.1 in)
1939	45.5 mm (1.8 in)
1940	27.9 mm (1.1 in)
1941	24.9 mm (1.0 in)
1942	78.0 mm (3.1 in)
1943	44.5 mm (1.8 in)
1944	58.4 mm (2.3 in)
1945	51.8 mm (2.0 in)
1946	51.1 mm (2.0 in)
1947	38.1 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Lake Megantic, 1913 to 1947. The record is 161.4 mm (6.4 in) in 1917, marked on the chart; the median year is 69.1 mm (2.7 in).

Wettest five days (Rx5day) at Lake Megantic by year
Year	Wettest five days (Rx5day)
1913	50.8 mm (2.0 in)
1914	57.6 mm (2.3 in)
1915	69.1 mm (2.7 in)
1916	68.6 mm (2.7 in)
1917	161.4 mm (6.4 in)
1918	78.8 mm (3.1 in)
1919	83.8 mm (3.3 in)
1920	52.1 mm (2.1 in)
1921	77.5 mm (3.1 in)
1922	81.8 mm (3.2 in)
1923	71.2 mm (2.8 in)
1924	68.8 mm (2.7 in)
1925	109.3 mm (4.3 in)
1926	73.7 mm (2.9 in)
1927	77.2 mm (3.0 in)
1928	67.8 mm (2.7 in)
1929	56.1 mm (2.2 in)
1930	62.7 mm (2.5 in)
1931	56.9 mm (2.2 in)
1932	62.3 mm (2.5 in)
1933	112.9 mm (4.4 in)
1934	51.8 mm (2.0 in)
1935	55.2 mm (2.2 in)
1936	70.9 mm (2.8 in)
1937	52.0 mm (2.0 in)
1938	61.8 mm (2.4 in)
1939	92.2 mm (3.6 in)
1940	45.0 mm (1.8 in)
1941	51.6 mm (2.0 in)
1942	128.8 mm (5.1 in)
1943	105.5 mm (4.2 in)
1944	62.2 mm (2.4 in)
1945	91.1 mm (3.6 in)
1946	74.2 mm (2.9 in)
1947	78.2 mm (3.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Lake Megantic, 1913 to 1947. The record is 31 days in 1930, marked on the chart; the median year is 14 days.

Longest dry spell (CDD) at Lake Megantic by year
Year	Longest dry spell (CDD)
1913	11 days
1914	17 days
1915	14 days
1916	13 days
1917	13 days
1918	16 days
1919	10 days
1920	11 days
1921	14 days
1922	14 days
1923	10 days
1924	13 days
1925	15 days
1926	10 days
1927	21 days
1928	15 days
1929	11 days
1930	31 days
1931	20 days
1932	19 days
1933	13 days
1934	12 days
1935	14 days
1936	15 days
1937	13 days
1938	18 days
1939	17 days
1940	13 days
1941	14 days
1942	15 days
1943	16 days
1944	15 days
1945	14 days
1946	16 days
1947	9 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

25 years with a frost

Across 25 years with a frost, the median last spring frost at Lake Megantic falls on 25 May and the median first autumn frost on 18 September, which leaves a median of 116 days between them.

Fitted over all years, the growing season changes by +8.9 days per decade at this station.

Frost dates and growing season at Lake Megantic
Measure	Median, all years	Earliest period	Recent period (1915 to 1946)	Recent against earliest	Fitted trend
Last spring frost	25 May	n/a	25 May	n/a	-5.1 days per decade
First autumn frost	18 September	n/a	18 September	n/a	+3.9 days per decade
Growing days	116 days	n/a	116 days	n/a	+8.9 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

31 years, 1914 to 1946

A day with at least 46.0 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 96.7 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Lake Megantic: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	46.0 mm (1.8 in)
5 years	59.5 mm (2.3 in)
10 years	68.4 mm (2.7 in)
25 years	79.8 mm (3.1 in)
50 years	88.3 mm (3.5 in)	Longer than the 31 years of record
100 years	96.7 mm (3.8 in)	Longer than the 31 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, 31 years of values from 1914 to 1946.

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: 82.6 mm (3.3 in) in 1917; 78.0 mm (3.1 in) in 1942; 77.2 mm (3.0 in) in 1927.

Download the Data

Data for Lake Megantic standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lake Megantic 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).