Record envelope, standing records and threshold days for Grand Falls (CA008402050), Newfoundland and Labrador, Canada, with 74 years of record.
Key Facts for Grand Falls
Grand Falls (CA008402050) is a weather station in Newfoundland and Labrador, Canada at 48.93 latitude and -55.67 longitude, 60 m (197 ft) above sea level.
The station reports from 1934 to 2007, 74 years of record.
1,464 records set at Grand Falls still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Grand Falls set a daily record snowfall of 18.2 cm (7.2 in) on 24 December 1983.
About the Station
Location: Newfoundland and Labrador, Canada, 48.93 latitude, -55.67 longitude.
Elevation: 60 m (197 ft).
Period of record: 1934 to 2007, 74 years.
Eligible elements: tmax, tmin, prcp, snow.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Grand Falls. 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 Falls, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.5 C (54.5 F)
-35.6 C (-32.1 F)
n/a
n/a
Feb
13.0 C (55.4 F)
-34.4 C (-29.9 F)
n/a
n/a
Mar
15.6 C (60.1 F)
-30.6 C (-23.1 F)
n/a
n/a
Apr
21.0 C (69.8 F)
-20.6 C (-5.1 F)
n/a
n/a
May
29.4 C (84.9 F)
-8.3 C (17.1 F)
n/a
n/a
Jun
33.3 C (91.9 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
34.4 C (93.9 F)
0.5 C (32.9 F)
n/a
n/a
Aug
33.9 C (93.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
29.4 C (84.9 F)
-3.3 C (26.1 F)
n/a
n/a
Oct
27.2 C (81.0 F)
-8.3 C (17.1 F)
n/a
n/a
Nov
20.6 C (69.1 F)
-17.8 C (0.0 F)
n/a
n/a
Dec
16.7 C (62.1 F)
-29.4 C (-20.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Grand Falls still stand. 1939 holds the most, with 83.
Standing records at Grand Falls by the year they were set
Year set
Standing records
1934
49
1935
29
1937
47
1938
49
1939
83
1940
37
1941
41
1942
37
1943
37
1944
27
1945
17
1946
23
1956
16
1957
45
1958
25
1959
41
1960
28
1961
33
1962
36
1963
42
1964
28
1965
21
1966
26
1967
44
1968
30
1969
41
1970
39
1971
31
1972
58
1973
46
1974
27
1975
42
1976
45
1977
28
1978
29
1979
58
1980
21
1981
38
1982
24
1983
46
All-Time Record Progression
2 new records
2 all-time records were set at Grand Falls between 15 July 1975 and 13 January 1983. Each dot is a new record.
When Grand Falls set new all-time records
Date
Kind
Detail
1975-07-15
Record high minimum temperature
Record high minimum temperature 22.2 C (72.0 F)
1983-01-13
Record daily precipitation
Record daily precipitation 74.6 mm (2.9 in)
Wettest Day of Each Month
Jan: 74.6 mm (2.9 in)
The wettest day on record for each calendar month at Grand Falls. The most was 74.6 mm (2.9 in) on 13 January 1983.
Record daily precipitation for each month at Grand Falls
Month
Record daily precipitation (mm)
Date
Jan
74.6 mm (2.9 in)
13 January 1983
Feb
47.8 mm (1.9 in)
22 February 1973
Mar
38.6 mm (1.5 in)
8 March 1969
Apr
50.4 mm (2.0 in)
2 April 1983
May
36.3 mm (1.4 in)
1 May 1969
Jun
56.6 mm (2.2 in)
4 June 1965
Jul
72.4 mm (2.9 in)
16 July 1934
Aug
72.4 mm (2.9 in)
25 August 1935
Sep
55.9 mm (2.2 in)
28 September 1958
Oct
71.1 mm (2.8 in)
27 October 1973
Nov
63.0 mm (2.5 in)
5 November 1945
Dec
63.5 mm (2.5 in)
19 December 1966
Period of Record Coverage
1934 to 1983
Complete yearUnder 90 percent of days
40 years of record at Grand Falls, 1934 to 1983. 5 years have data for under 90 percent of days and are left out of rankings: 1934, 1935, 1943, 1946, 1956.
Cooler than the station meanWarmer than the station mean
One stripe for each of 32 complete years at Grand Falls, 1934 to 1983. Blue stripes are years cooler than the station's own mean of 4.5 C (40.1 F); red stripes are warmer. The coolest year was 1939, at 2.3 C (36.1 F), and the warmest was 1981, at 6.2 C (43.2 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Grand Falls as warming stripes, 1934 to 1983
Year
Annual mean temperature
Difference from the station mean
1934
3.6 C
-0.90 C
1937
5.2 C
+0.70 C
1939
2.3 C
-2.25 C
1941
3.6 C
-0.94 C
1942
5.1 C
+0.58 C
1944
4.5 C
-0.03 C
1945
4.4 C
-0.17 C
1957
4.3 C
-0.24 C
1958
5.5 C
+1.01 C
1959
4.0 C
-0.57 C
1960
5.5 C
+0.96 C
1961
4.7 C
+0.16 C
1962
4.2 C
-0.37 C
1963
4.5 C
-0.03 C
1964
3.8 C
-0.71 C
1965
4.0 C
-0.50 C
1966
5.5 C
+1.00 C
1969
5.8 C
+1.29 C
1970
5.0 C
+0.51 C
1971
5.2 C
+0.69 C
1972
2.8 C
-1.69 C
1973
4.7 C
+0.20 C
1974
3.3 C
-1.24 C
1975
3.9 C
-0.61 C
1976
4.5 C
-0.04 C
1977
5.0 C
+0.43 C
1978
4.2 C
-0.31 C
1979
6.0 C
+1.47 C
1980
4.1 C
-0.40 C
1981
6.2 C
+1.71 C
1982
3.9 C
-0.58 C
1983
5.5 C
+0.95 C
The fitted trend in annual mean temperature here over 1934 to 1983 is 0.2 C (-0.1 to 0.4) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.1 to 0.7) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Grand Falls
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (-0.1 to 0.4) per decade
0.3 F (-0.1 to 0.7) per decade
1934 to 1983
32
Not clearly different from zero
Mean daily maximum
0.1 C (-0.1 to 0.3) per decade
0.1 F (-0.2 to 0.5) per decade
1934 to 1983
32
Not clearly different from zero
Mean daily minimum
0.25 C (-0.03 to 0.53) per decade
0.5 F (-0.1 to 1.0) per decade
1934 to 1983
32
Not clearly different from zero
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
1934 to 1983
Yearly extremes at Grand Falls: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
34.4 C (93.9 F)
1941
31.7 C (89.1 F)
40
Coldest night (TNn)
-35.6 C (-32.1 F)
1934
-25.0 C (-13.0 F)
40
Wettest day (Rx1day)
74.6 mm (2.9 in)
1983
45.6 mm (1.8 in)
40
Wettest five days (Rx5day)
148.6 mm (5.9 in)
1935
75.5 mm (3.0 in)
40
Longest dry spell (CDD)
21 days
1973
13 days
40
Hottest day (TXx)
The hottest day of the year at Grand Falls, 1934 to 1983. The record is 34.4 C (93.9 F) in 1941, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Grand Falls by year
Year
Hottest day (TXx)
1934
30.6 C (87.1 F)
1935
32.8 C (91.0 F)
1937
33.9 C (93.0 F)
1938
31.1 C (88.0 F)
1939
31.7 C (89.1 F)
1940
32.2 C (90.0 F)
1941
34.4 C (93.9 F)
1942
31.1 C (88.0 F)
1943
29.4 C (84.9 F)
1944
32.8 C (91.0 F)
1945
31.7 C (89.1 F)
1946
26.7 C (80.1 F)
1956
27.8 C (82.0 F)
1957
28.3 C (82.9 F)
1958
29.4 C (84.9 F)
1959
31.7 C (89.1 F)
1960
31.7 C (89.1 F)
1961
31.7 C (89.1 F)
1962
30.6 C (87.1 F)
1963
33.3 C (91.9 F)
1964
29.4 C (84.9 F)
1965
30.0 C (86.0 F)
1966
28.9 C (84.0 F)
1967
33.3 C (91.9 F)
1968
31.7 C (89.1 F)
1969
30.0 C (86.0 F)
1970
31.7 C (89.1 F)
1971
29.4 C (84.9 F)
1972
33.3 C (91.9 F)
1973
31.1 C (88.0 F)
1974
30.0 C (86.0 F)
1975
34.4 C (93.9 F)
1976
33.9 C (93.0 F)
1977
31.1 C (88.0 F)
1978
31.7 C (89.1 F)
1979
33.3 C (91.9 F)
1980
29.5 C (85.1 F)
1981
32.0 C (89.6 F)
1982
33.5 C (92.3 F)
1983
33.5 C (92.3 F)
Coldest night (TNn)
The coldest night of the year at Grand Falls, 1934 to 1983. The record is -35.6 C (-32.1 F) in 1934, marked on the chart; the median year is -25.0 C (-13.0 F).
Coldest night (TNn) at Grand Falls by year
Year
Coldest night (TNn)
1934
-35.6 C (-32.1 F)
1935
-33.3 C (-27.9 F)
1937
-26.7 C (-16.1 F)
1938
-33.3 C (-27.9 F)
1939
-31.7 C (-25.1 F)
1940
-26.7 C (-16.1 F)
1941
-21.7 C (-7.1 F)
1942
-23.3 C (-9.9 F)
1943
-28.3 C (-18.9 F)
1944
-30.0 C (-22.0 F)
1945
-22.8 C (-9.0 F)
1946
-23.3 C (-9.9 F)
1956
-24.4 C (-11.9 F)
1957
-28.3 C (-18.9 F)
1958
-20.6 C (-5.1 F)
1959
-22.8 C (-9.0 F)
1960
-18.9 C (-2.0 F)
1961
-27.8 C (-18.0 F)
1962
-23.3 C (-9.9 F)
1963
-25.6 C (-14.1 F)
1964
-25.0 C (-13.0 F)
1965
-25.6 C (-14.1 F)
1966
-25.0 C (-13.0 F)
1967
-23.9 C (-11.0 F)
1968
-26.1 C (-15.0 F)
1969
-17.8 C (0.0 F)
1970
-23.3 C (-9.9 F)
1971
-29.4 C (-20.9 F)
1972
-29.4 C (-20.9 F)
1973
-27.8 C (-18.0 F)
1974
-24.4 C (-11.9 F)
1975
-34.4 C (-29.9 F)
1976
-25.0 C (-13.0 F)
1977
-22.8 C (-9.0 F)
1978
-27.2 C (-17.0 F)
1979
-22.2 C (-8.0 F)
1980
-22.5 C (-8.5 F)
1981
-19.5 C (-3.1 F)
1982
-25.5 C (-13.9 F)
1983
-22.5 C (-8.5 F)
Wettest day (Rx1day)
The wettest day of the year at Grand Falls, 1934 to 1983. The record is 74.6 mm (2.9 in) in 1983, marked on the chart; the median year is 45.6 mm (1.8 in).
Wettest day (Rx1day) at Grand Falls by year
Year
Wettest day (Rx1day)
1934
72.4 mm (2.9 in)
1935
72.4 mm (2.9 in)
1937
56.9 mm (2.2 in)
1938
45.7 mm (1.8 in)
1939
52.6 mm (2.1 in)
1940
57.2 mm (2.3 in)
1941
38.6 mm (1.5 in)
1942
58.4 mm (2.3 in)
1943
70.1 mm (2.8 in)
1944
43.2 mm (1.7 in)
1945
63.0 mm (2.5 in)
1946
29.5 mm (1.2 in)
1956
37.8 mm (1.5 in)
1957
47.0 mm (1.9 in)
1958
55.9 mm (2.2 in)
1959
34.8 mm (1.4 in)
1960
37.6 mm (1.5 in)
1961
45.7 mm (1.8 in)
1962
43.2 mm (1.7 in)
1963
45.5 mm (1.8 in)
1964
35.6 mm (1.4 in)
1965
56.6 mm (2.2 in)
1966
63.5 mm (2.5 in)
1967
52.6 mm (2.1 in)
1968
44.2 mm (1.7 in)
1969
69.6 mm (2.7 in)
1970
30.5 mm (1.2 in)
1971
36.8 mm (1.4 in)
1972
40.6 mm (1.6 in)
1973
71.1 mm (2.8 in)
1974
32.8 mm (1.3 in)
1975
44.5 mm (1.8 in)
1976
40.1 mm (1.6 in)
1977
37.6 mm (1.5 in)
1978
27.9 mm (1.1 in)
1979
54.9 mm (2.2 in)
1980
42.0 mm (1.7 in)
1981
45.6 mm (1.8 in)
1982
39.2 mm (1.5 in)
1983
74.6 mm (2.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Grand Falls, 1934 to 1983. The record is 148.6 mm (5.9 in) in 1935, marked on the chart; the median year is 75.5 mm (3.0 in).
Wettest five days (Rx5day) at Grand Falls by year
Year
Wettest five days (Rx5day)
1934
74.4 mm (2.9 in)
1935
148.6 mm (5.9 in)
1937
69.9 mm (2.8 in)
1938
110.5 mm (4.4 in)
1939
73.9 mm (2.9 in)
1940
77.3 mm (3.0 in)
1941
73.4 mm (2.9 in)
1942
113.1 mm (4.5 in)
1943
106.3 mm (4.2 in)
1944
101.6 mm (4.0 in)
1945
95.2 mm (3.7 in)
1946
43.3 mm (1.7 in)
1956
51.7 mm (2.0 in)
1957
74.9 mm (2.9 in)
1958
78.8 mm (3.1 in)
1959
55.7 mm (2.2 in)
1960
59.7 mm (2.4 in)
1961
67.8 mm (2.7 in)
1962
73.2 mm (2.9 in)
1963
70.3 mm (2.8 in)
1964
85.2 mm (3.4 in)
1965
76.4 mm (3.0 in)
1966
98.4 mm (3.9 in)
1967
62.8 mm (2.5 in)
1968
92.7 mm (3.6 in)
1969
91.7 mm (3.6 in)
1970
57.0 mm (2.2 in)
1971
56.9 mm (2.2 in)
1972
56.9 mm (2.2 in)
1973
82.8 mm (3.3 in)
1974
77.7 mm (3.1 in)
1975
77.2 mm (3.0 in)
1976
63.3 mm (2.5 in)
1977
65.6 mm (2.6 in)
1978
60.2 mm (2.4 in)
1979
78.0 mm (3.1 in)
1980
101.6 mm (4.0 in)
1981
76.0 mm (3.0 in)
1982
72.6 mm (2.9 in)
1983
133.4 mm (5.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Grand Falls, 1934 to 1983. The record is 21 days in 1973, marked on the chart; the median year is 13 days.
Longest dry spell (CDD) at Grand Falls by year
Year
Longest dry spell (CDD)
1934
11 days
1935
17 days
1937
13 days
1938
17 days
1939
10 days
1940
16 days
1941
12 days
1942
18 days
1943
17 days
1944
12 days
1945
17 days
1946
18 days
1956
10 days
1957
11 days
1958
15 days
1959
13 days
1960
15 days
1961
14 days
1962
19 days
1963
8 days
1964
10 days
1965
10 days
1966
13 days
1967
10 days
1968
11 days
1969
18 days
1970
11 days
1971
15 days
1972
19 days
1973
21 days
1974
12 days
1975
10 days
1976
14 days
1977
13 days
1978
12 days
1979
21 days
1980
10 days
1981
13 days
1982
13 days
1983
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
32 years with a frost
Across 32 years with a frost, the median last spring frost at Grand Falls falls on 5 June and the median first autumn frost on 28 September, which leaves a median of 115 days between them.
Fitted over all years, the growing season changes by +2.3 days per decade at this station.
Frost dates and growing season at Grand Falls
Measure
Median, all years
Earliest period
Recent period (1939 to 1983)
Recent against earliest
Fitted trend
Last spring frost
5 June
n/a
5 June
n/a
-1.9 days per decade
First autumn frost
28 September
n/a
26 September
n/a
+0.4 days per decade
Growing days
115 days
n/a
113 days
n/a
+2.3 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
35 years, 1937 to 1983
A day with at least 45.9 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 83.9 mm (3.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Grand Falls: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
45.9 mm (1.8 in)
5 years
56.8 mm (2.2 in)
10 years
63.7 mm (2.5 in)
25 years
72.1 mm (2.8 in)
50 years
78.1 mm (3.1 in)
Longer than the 35 years of record
100 years
83.9 mm (3.3 in)
Longer than the 35 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, 35 years of values from 1937 to 1983.
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: 74.6 mm (2.9 in) in 1983; 71.1 mm (2.8 in) in 1973; 69.6 mm (2.7 in) in 1969.
Download the Data
Data for Grand Falls standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Grand Falls 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.