Record envelope, standing records and threshold days for Nelson (CA001145430), British Columbia, Canada, with 52 years of record.
Key Facts for Nelson
Nelson (CA001145430) is a weather station in British Columbia, Canada at 49.48 latitude and -117.35 longitude, 540 m (1,772 ft) above sea level.
The station reports from 1904 to 1955, 52 years of record.
1,464 records set at Nelson still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Nelson set a daily record high maximum temperature of 20.6 C (69.1 F) on 18 October 1955.
About the Station
Location: British Columbia, Canada, 49.48 latitude, -117.35 longitude.
Elevation: 540 m (1,772 ft).
Period of record: 1904 to 1955, 52 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 Nelson. 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 Nelson, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.8 C (55.0 F)
-27.2 C (-17.0 F)
n/a
n/a
Feb
13.9 C (57.0 F)
-27.2 C (-17.0 F)
n/a
n/a
Mar
20.0 C (68.0 F)
-20.6 C (-5.1 F)
n/a
n/a
Apr
27.8 C (82.0 F)
-13.3 C (8.1 F)
n/a
n/a
May
32.8 C (91.0 F)
-3.3 C (26.1 F)
n/a
n/a
Jun
37.8 C (100.0 F)
0.0 C (32.0 F)
n/a
n/a
Jul
39.4 C (102.9 F)
3.3 C (37.9 F)
n/a
n/a
Aug
38.9 C (102.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
33.9 C (93.0 F)
-6.7 C (19.9 F)
n/a
n/a
Oct
26.7 C (80.1 F)
-13.9 C (7.0 F)
n/a
n/a
Nov
15.0 C (59.0 F)
-20.6 C (-5.1 F)
n/a
n/a
Dec
11.7 C (53.1 F)
-24.4 C (-11.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Nelson still stand. 1922 holds the most, with 82.
Standing records at Nelson by the year they were set
Year set
Standing records
1904
30
1905
27
1906
25
1907
23
1908
28
1909
46
1910
20
1911
16
1912
30
1913
26
1914
25
1915
15
1916
35
1917
30
1918
30
1919
55
1920
21
1921
62
1922
82
1923
17
1924
51
1925
18
1926
40
1927
22
1928
24
1929
28
1930
35
1931
20
1932
30
1933
31
1934
27
1935
35
1936
46
1937
20
1938
16
1939
22
1940
24
1941
33
1942
21
1943
21
1944
20
1945
15
1946
10
1947
24
1948
8
1949
29
1950
28
1951
15
1952
26
1953
36
1954
18
1955
28
All-Time Record Progression
4 new records
4 all-time records were set at Nelson between 28 July 1934 and 20 January 1943. Each dot is a new record.
When Nelson set new all-time records
Date
Kind
Detail
1934-07-28
Record high maximum temperature
Record high maximum temperature 39.4 C (102.9 F)
1934-12-28
Record daily snowfall
Record daily snowfall 39.1 cm (15.4 in)
1940-10-10
Record daily precipitation
Record daily precipitation 65.8 mm (2.6 in)
1943-01-20
Record daily snowfall
Record daily snowfall 42.7 cm (16.8 in)
Wettest Day of Each Month
Oct: 65.8 mm (2.6 in)
The wettest day on record for each calendar month at Nelson. The most was 65.8 mm (2.6 in) on 10 October 1940.
Record daily precipitation for each month at Nelson
Month
Record daily precipitation (mm)
Date
Jan
42.7 mm (1.7 in)
20 January 1943
Feb
37.3 mm (1.5 in)
1 February 1937
Mar
40.1 mm (1.6 in)
11 March 1929
Apr
25.7 mm (1.0 in)
12 April 1937
May
35.1 mm (1.4 in)
9 May 1905
Jun
38.1 mm (1.5 in)
10 June 1948
Jul
48.3 mm (1.9 in)
24 July 1923
Aug
45.7 mm (1.8 in)
25 August 1907
Sep
35.6 mm (1.4 in)
4 September 1913
Oct
65.8 mm (2.6 in)
10 October 1940
Nov
33.8 mm (1.3 in)
13 November 1937
Dec
39.1 mm (1.5 in)
28 December 1934
Period of Record Coverage
1904 to 1955
Complete yearUnder 90 percent of days
52 years of record at Nelson, 1904 to 1955. 2 years have data for under 90 percent of days and are left out of rankings: 1936, 1955.
Cooler than the station meanWarmer than the station mean
One stripe for each of 48 complete years at Nelson, 1904 to 1954. Blue stripes are years cooler than the station's own mean of 7.7 C (45.9 F); red stripes are warmer. The coolest year was 1916, at 5.9 C (42.6 F), and the warmest was 1953, at 9.3 C (48.7 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Nelson as warming stripes, 1904 to 1954
Year
Annual mean temperature
Difference from the station mean
1904
8.0 C
+0.26 C
1905
7.9 C
+0.14 C
1906
8.7 C
+0.93 C
1908
8.1 C
+0.36 C
1910
7.8 C
+0.10 C
1911
6.5 C
-1.22 C
1912
7.5 C
-0.26 C
1913
6.7 C
-1.01 C
1914
8.0 C
+0.30 C
1915
8.3 C
+0.58 C
1916
5.9 C
-1.86 C
1917
7.3 C
-0.43 C
1918
7.7 C
-0.07 C
1919
7.0 C
-0.72 C
1920
7.1 C
-0.68 C
1921
7.1 C
-0.59 C
1922
6.7 C
-1.06 C
1923
7.5 C
-0.25 C
1924
7.0 C
-0.75 C
1925
8.0 C
+0.27 C
1926
8.0 C
+0.24 C
1927
6.3 C
-1.39 C
1928
7.4 C
-0.30 C
1929
6.2 C
-1.49 C
1930
6.8 C
-0.98 C
1931
7.5 C
-0.21 C
1932
6.9 C
-0.81 C
1933
7.0 C
-0.70 C
1934
8.7 C
+0.98 C
1935
6.9 C
-0.83 C
1937
6.7 C
-1.01 C
1938
8.5 C
+0.74 C
1939
8.5 C
+0.75 C
1940
9.2 C
+1.47 C
1941
9.0 C
+1.26 C
1942
8.5 C
+0.77 C
1943
8.3 C
+0.55 C
1944
9.2 C
+1.45 C
1945
8.6 C
+0.83 C
1946
8.6 C
+0.82 C
1947
8.8 C
+1.11 C
1948
7.4 C
-0.30 C
1949
7.8 C
+0.05 C
1950
7.4 C
-0.38 C
1951
7.8 C
+0.05 C
1952
9.2 C
+1.46 C
1953
9.3 C
+1.56 C
1954
8.0 C
+0.26 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.4) per decade over 1904 to 1954. In Fahrenheit: 0.4 F (0.1 to 0.7) per decade. The slope is a straight line fitted to 48 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Nelson
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.4) per decade
0.4 F (0.1 to 0.7) per decade
1904 to 1954
48
Rise
Mean daily maximum
0.22 C (0.05 to 0.39) per decade
0.4 F (0.1 to 0.7) per decade
1904 to 1954
48
Rise
Mean daily minimum
0.25 C (0.04 to 0.46) per decade
0.4 F (0.1 to 0.8) per decade
1904 to 1954
48
Rise
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
1904 to 1955
Yearly extremes at Nelson: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
1934
35.6 C (96.1 F)
52
Coldest night (TNn)
-27.2 C (-17.0 F)
1909
-19.4 C (-2.9 F)
52
Wettest day (Rx1day)
65.8 mm (2.6 in)
1940
26.9 mm (1.1 in)
52
Wettest five days (Rx5day)
96.1 mm (3.8 in)
1934
58.5 mm (2.3 in)
52
Longest dry spell (CDD)
51 days
1922
24 days
52
Hottest day (TXx)
The hottest day of the year at Nelson, 1904 to 1955. The record is 39.4 C (102.9 F) in 1934, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Nelson by year
Year
Hottest day (TXx)
1904
34.4 C (93.9 F)
1905
34.4 C (93.9 F)
1906
34.4 C (93.9 F)
1907
30.6 C (87.1 F)
1908
32.2 C (90.0 F)
1909
32.2 C (90.0 F)
1910
34.4 C (93.9 F)
1911
33.9 C (93.0 F)
1912
37.8 C (100.0 F)
1913
34.4 C (93.9 F)
1914
37.2 C (99.0 F)
1915
35.6 C (96.1 F)
1916
32.2 C (90.0 F)
1917
37.2 C (99.0 F)
1918
35.0 C (95.0 F)
1919
37.2 C (99.0 F)
1920
36.1 C (97.0 F)
1921
37.8 C (100.0 F)
1922
37.8 C (100.0 F)
1923
32.2 C (90.0 F)
1924
37.8 C (100.0 F)
1925
33.9 C (93.0 F)
1926
37.8 C (100.0 F)
1927
35.6 C (96.1 F)
1928
37.2 C (99.0 F)
1929
37.8 C (100.0 F)
1930
38.9 C (102.0 F)
1931
35.6 C (96.1 F)
1932
35.6 C (96.1 F)
1933
37.2 C (99.0 F)
1934
39.4 C (102.9 F)
1935
33.9 C (93.0 F)
1936
32.8 C (91.0 F)
1937
33.3 C (91.9 F)
1938
37.8 C (100.0 F)
1939
36.7 C (98.1 F)
1940
35.6 C (96.1 F)
1941
37.2 C (99.0 F)
1942
35.6 C (96.1 F)
1943
36.1 C (97.0 F)
1944
37.8 C (100.0 F)
1945
37.8 C (100.0 F)
1946
37.8 C (100.0 F)
1947
34.4 C (93.9 F)
1948
35.0 C (95.0 F)
1949
37.8 C (100.0 F)
1950
34.4 C (93.9 F)
1951
37.2 C (99.0 F)
1952
37.2 C (99.0 F)
1953
35.6 C (96.1 F)
1954
33.3 C (91.9 F)
1955
33.3 C (91.9 F)
Coldest night (TNn)
The coldest night of the year at Nelson, 1904 to 1955. The record is -27.2 C (-17.0 F) in 1909, marked on the chart; the median year is -19.4 C (-2.9 F).
Coldest night (TNn) at Nelson by year
Year
Coldest night (TNn)
1904
-13.9 C (7.0 F)
1905
-21.1 C (-6.0 F)
1906
-15.0 C (5.0 F)
1907
-19.4 C (-2.9 F)
1908
-18.9 C (-2.0 F)
1909
-27.2 C (-17.0 F)
1910
-18.9 C (-2.0 F)
1911
-20.6 C (-5.1 F)
1912
-20.0 C (-4.0 F)
1913
-19.4 C (-2.9 F)
1914
-17.2 C (1.0 F)
1915
-18.3 C (-0.9 F)
1916
-22.2 C (-8.0 F)
1917
-23.9 C (-11.0 F)
1918
-19.4 C (-2.9 F)
1919
-23.9 C (-11.0 F)
1920
-19.4 C (-2.9 F)
1921
-20.6 C (-5.1 F)
1922
-23.3 C (-9.9 F)
1923
-23.9 C (-11.0 F)
1924
-23.9 C (-11.0 F)
1925
-16.1 C (3.0 F)
1926
-18.3 C (-0.9 F)
1927
-24.4 C (-11.9 F)
1928
-15.6 C (3.9 F)
1929
-23.9 C (-11.0 F)
1930
-23.3 C (-9.9 F)
1931
-14.4 C (6.1 F)
1932
-23.9 C (-11.0 F)
1933
-26.7 C (-16.1 F)
1934
-13.3 C (8.1 F)
1935
-27.2 C (-17.0 F)
1936
-27.2 C (-17.0 F)
1937
-23.3 C (-9.9 F)
1938
-13.9 C (7.0 F)
1939
-18.9 C (-2.0 F)
1940
-12.8 C (9.0 F)
1941
-14.4 C (6.1 F)
1942
-16.7 C (1.9 F)
1943
-25.0 C (-13.0 F)
1944
-15.0 C (5.0 F)
1945
-15.0 C (5.0 F)
1946
-14.4 C (6.1 F)
1947
-17.8 C (0.0 F)
1948
-15.6 C (3.9 F)
1949
-18.9 C (-2.0 F)
1950
-26.7 C (-16.1 F)
1951
-20.6 C (-5.1 F)
1952
-21.1 C (-6.0 F)
1953
-8.3 C (17.1 F)
1954
-21.1 C (-6.0 F)
1955
-20.6 C (-5.1 F)
Wettest day (Rx1day)
The wettest day of the year at Nelson, 1904 to 1955. The record is 65.8 mm (2.6 in) in 1940, marked on the chart; the median year is 26.9 mm (1.1 in).
Wettest day (Rx1day) at Nelson by year
Year
Wettest day (Rx1day)
1904
24.9 mm (1.0 in)
1905
35.1 mm (1.4 in)
1906
21.3 mm (0.8 in)
1907
45.7 mm (1.8 in)
1908
19.3 mm (0.8 in)
1909
30.5 mm (1.2 in)
1910
22.9 mm (0.9 in)
1911
24.6 mm (1.0 in)
1912
26.7 mm (1.1 in)
1913
35.6 mm (1.4 in)
1914
27.9 mm (1.1 in)
1915
18.8 mm (0.7 in)
1916
25.4 mm (1.0 in)
1917
33.0 mm (1.3 in)
1918
29.5 mm (1.2 in)
1919
22.9 mm (0.9 in)
1920
24.4 mm (1.0 in)
1921
20.1 mm (0.8 in)
1922
23.4 mm (0.9 in)
1923
48.3 mm (1.9 in)
1924
25.7 mm (1.0 in)
1925
23.6 mm (0.9 in)
1926
27.7 mm (1.1 in)
1927
26.4 mm (1.0 in)
1928
32.8 mm (1.3 in)
1929
40.1 mm (1.6 in)
1930
21.1 mm (0.8 in)
1931
25.4 mm (1.0 in)
1932
33.3 mm (1.3 in)
1933
32.8 mm (1.3 in)
1934
39.1 mm (1.5 in)
1935
23.4 mm (0.9 in)
1936
21.1 mm (0.8 in)
1937
37.3 mm (1.5 in)
1938
25.4 mm (1.0 in)
1939
26.9 mm (1.1 in)
1940
65.8 mm (2.6 in)
1941
26.9 mm (1.1 in)
1942
24.1 mm (0.9 in)
1943
42.7 mm (1.7 in)
1944
25.4 mm (1.0 in)
1945
20.3 mm (0.8 in)
1946
29.0 mm (1.1 in)
1947
27.2 mm (1.1 in)
1948
38.1 mm (1.5 in)
1949
25.4 mm (1.0 in)
1950
29.2 mm (1.1 in)
1951
27.4 mm (1.1 in)
1952
31.8 mm (1.3 in)
1953
32.8 mm (1.3 in)
1954
31.0 mm (1.2 in)
1955
21.3 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Nelson, 1904 to 1955. The record is 96.1 mm (3.8 in) in 1934, marked on the chart; the median year is 58.5 mm (2.3 in).
Wettest five days (Rx5day) at Nelson by year
Year
Wettest five days (Rx5day)
1904
59.7 mm (2.4 in)
1905
72.6 mm (2.9 in)
1906
50.2 mm (2.0 in)
1907
84.3 mm (3.3 in)
1908
45.7 mm (1.8 in)
1909
67.3 mm (2.6 in)
1910
47.6 mm (1.9 in)
1911
53.3 mm (2.1 in)
1912
46.8 mm (1.8 in)
1913
50.3 mm (2.0 in)
1914
83.8 mm (3.3 in)
1915
40.9 mm (1.6 in)
1916
55.9 mm (2.2 in)
1917
64.8 mm (2.6 in)
1918
65.4 mm (2.6 in)
1919
65.6 mm (2.6 in)
1920
65.2 mm (2.6 in)
1921
47.0 mm (1.9 in)
1922
42.4 mm (1.7 in)
1923
71.4 mm (2.8 in)
1924
54.1 mm (2.1 in)
1925
39.7 mm (1.6 in)
1926
60.5 mm (2.4 in)
1927
71.6 mm (2.8 in)
1928
54.4 mm (2.1 in)
1929
56.7 mm (2.2 in)
1930
63.0 mm (2.5 in)
1931
52.6 mm (2.1 in)
1932
68.6 mm (2.7 in)
1933
78.3 mm (3.1 in)
1934
96.1 mm (3.8 in)
1935
82.1 mm (3.2 in)
1936
48.3 mm (1.9 in)
1937
81.0 mm (3.2 in)
1938
74.4 mm (2.9 in)
1939
58.7 mm (2.3 in)
1940
77.3 mm (3.0 in)
1941
53.6 mm (2.1 in)
1942
61.7 mm (2.4 in)
1943
60.3 mm (2.4 in)
1944
38.3 mm (1.5 in)
1945
51.3 mm (2.0 in)
1946
55.1 mm (2.2 in)
1947
55.6 mm (2.2 in)
1948
55.1 mm (2.2 in)
1949
53.4 mm (2.1 in)
1950
64.8 mm (2.6 in)
1951
71.9 mm (2.8 in)
1952
46.6 mm (1.8 in)
1953
70.1 mm (2.8 in)
1954
58.3 mm (2.3 in)
1955
48.3 mm (1.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Nelson, 1904 to 1955. The record is 51 days in 1922, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at Nelson by year
Year
Longest dry spell (CDD)
1904
24 days
1905
15 days
1906
26 days
1907
25 days
1908
21 days
1909
18 days
1910
29 days
1911
28 days
1912
21 days
1913
21 days
1914
30 days
1915
22 days
1916
24 days
1917
22 days
1918
20 days
1919
26 days
1920
19 days
1921
19 days
1922
51 days
1923
16 days
1924
36 days
1925
19 days
1926
44 days
1927
28 days
1928
20 days
1929
20 days
1930
24 days
1931
27 days
1932
28 days
1933
19 days
1934
48 days
1935
26 days
1936
17 days
1937
12 days
1938
16 days
1939
36 days
1940
27 days
1941
15 days
1942
13 days
1943
34 days
1944
28 days
1945
24 days
1946
30 days
1947
20 days
1948
20 days
1949
20 days
1950
31 days
1951
44 days
1952
44 days
1953
15 days
1954
24 days
1955
47 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
48 years with a frost
Across 48 years with a frost, the median last spring frost at Nelson falls on 6 May and the median first autumn frost on 30 September, which leaves a median of 142 days between them.
Fitted over all years, the growing season changes by +5.6 days per decade at this station.
Frost dates and growing season at Nelson
Measure
Median, all years
Earliest period
Recent period (1924 to 1954)
Recent against earliest
Fitted trend
Last spring frost
6 May
n/a
7 May
n/a
-2.7 days per decade
First autumn frost
30 September
n/a
27 September
n/a
+2.9 days per decade
Growing days
142 days
n/a
147 days
n/a
+5.6 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
50 years, 1904 to 1954
A day with at least 27.4 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 62.3 mm (2.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Nelson: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
27.4 mm (1.1 in)
5 years
34.3 mm (1.4 in)
10 years
39.7 mm (1.6 in)
25 years
47.7 mm (1.9 in)
50 years
54.6 mm (2.1 in)
100 years
62.3 mm (2.5 in)
Longer than the 50 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, 50 years of values from 1904 to 1954.
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: 65.8 mm (2.6 in) in 1940; 48.3 mm (1.9 in) in 1923; 45.7 mm (1.8 in) in 1907.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Nelson, at 1923 and 1942. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1923 ran 0.5 C (0.9 F) lower than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1942 ran 0.8 C (1.5 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Nelson, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1923
-0.5
-0.9
likely
5
1942
+0.8
+1.5
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Nelson standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Nelson 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.