Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Pierson. 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 Pierson, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
8.9 C (48.0 F)
-44.4 C (-47.9 F)
n/a
n/a
Feb
14.4 C (57.9 F)
-47.8 C (-54.0 F)
n/a
n/a
Mar
23.9 C (75.0 F)
-45.0 C (-49.0 F)
n/a
n/a
Apr
34.0 C (93.2 F)
-26.1 C (-15.0 F)
n/a
n/a
May
39.4 C (102.9 F)
-12.2 C (10.0 F)
n/a
n/a
Jun
41.7 C (107.1 F)
-6.1 C (21.0 F)
n/a
n/a
Jul
42.8 C (109.0 F)
-2.2 C (28.0 F)
n/a
n/a
Aug
38.9 C (102.0 F)
-6.1 C (21.0 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-12.2 C (10.0 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Nov
22.8 C (73.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Dec
17.2 C (63.0 F)
-42.0 C (-43.6 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Pierson still stand. 1936 holds the most, with 60.
Standing records at Pierson by the year they were set
Year set
Standing records
1904
5
1905
2
1908
14
1909
12
1910
17
1911
11
1912
10
1913
14
1914
18
1915
21
1916
11
1917
20
1918
18
1919
20
1920
11
1921
10
1922
25
1923
15
1924
5
1925
11
1926
8
1927
17
1928
12
1929
14
1930
13
1931
22
1932
17
1933
27
1934
44
1935
30
1936
60
1937
25
1938
24
1939
40
1940
25
1941
13
1945
9
1946
17
1947
19
1948
30
1949
22
1950
43
1951
28
1952
20
1953
16
1954
35
1955
21
1956
20
1957
20
1958
27
1959
16
1960
9
1961
19
1962
27
1963
23
1964
20
1965
12
1966
22
1967
6
1968
25
1969
16
1970
8
1971
12
1972
21
1973
27
1974
10
1975
13
1976
14
1977
34
1978
18
1979
14
1980
28
1981
38
1982
14
1983
30
Wettest Day of Each Month
Jun: 160.0 mm (6.3 in)
The wettest day on record for each calendar month at Pierson. The most was 160.0 mm (6.3 in) on 29 June 1935.
Record daily precipitation for each month at Pierson
Month
Record daily precipitation (mm)
Date
Jan
15.2 mm (0.6 in)
14 January 1947
Feb
27.4 mm (1.1 in)
27 February 1976
Mar
35.8 mm (1.4 in)
1 March 1976
Apr
61.0 mm (2.4 in)
23 April 1948
May
84.8 mm (3.3 in)
1 May 1941
Jun
160.0 mm (6.3 in)
29 June 1935
Jul
118.9 mm (4.7 in)
16 July 1939
Aug
73.7 mm (2.9 in)
4 August 1911
Sep
72.6 mm (2.9 in)
4 September 1971
Oct
47.2 mm (1.9 in)
15 October 1962
Nov
20.3 mm (0.8 in)
26 November 1977
Dec
22.9 mm (0.9 in)
16 December 1977
Period of Record Coverage
1904 to 1983
Complete yearUnder 90 percent of days
75 years of record at Pierson, 1904 to 1983. 29 years have data for under 90 percent of days and are left out of rankings: 1904, 1905, 1908, 1909, 1910, 1911, 1912, 1913 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 45 complete years at Pierson, 1933 to 1983. Blue stripes are years cooler than the station's own mean of 2.5 C (36.5 F); red stripes are warmer. The coolest year was 1950, at -0.9 C (30.3 F), and the warmest was 1981, at 5.0 C (41.1 F). The strongest colour marks a difference of 3.5 C (6.3 F).
Annual mean temperature at Pierson as warming stripes, 1933 to 1983
Year
Annual mean temperature
Difference from the station mean
1933
2.7 C
+0.16 C
1934
4.1 C
+1.55 C
1935
1.1 C
-1.43 C
1936
1.0 C
-1.55 C
1937
1.7 C
-0.78 C
1938
3.5 C
+1.02 C
1939
3.0 C
+0.51 C
1940
2.5 C
-0.07 C
1946
2.2 C
-0.33 C
1947
2.0 C
-0.53 C
1948
1.2 C
-1.35 C
1949
1.4 C
-1.14 C
1950
-0.9 C
-3.47 C
1952
3.4 C
+0.84 C
1953
4.0 C
+1.43 C
1954
3.2 C
+0.65 C
1955
1.3 C
-1.22 C
1956
1.9 C
-0.60 C
1957
3.0 C
+0.43 C
1958
3.2 C
+0.70 C
1959
2.5 C
-0.04 C
1960
2.5 C
+0.02 C
1961
3.4 C
+0.88 C
1962
2.8 C
+0.27 C
1963
4.1 C
+1.61 C
1964
2.5 C
-0.06 C
1965
1.6 C
-0.93 C
1966
1.7 C
-0.81 C
1967
2.3 C
-0.18 C
1968
2.2 C
-0.36 C
1969
1.7 C
-0.79 C
1970
1.7 C
-0.80 C
1971
2.9 C
+0.34 C
1972
1.9 C
-0.66 C
1973
4.3 C
+1.76 C
1974
2.4 C
-0.09 C
1975
2.5 C
+0.02 C
1976
3.4 C
+0.87 C
1977
3.9 C
+1.40 C
1978
2.2 C
-0.36 C
1979
1.5 C
-1.03 C
1980
3.7 C
+1.15 C
1981
5.0 C
+2.52 C
1982
1.8 C
-0.75 C
1983
3.7 C
+1.21 C
The fitted trend in annual mean temperature here over 1933 to 1983 is 0.17 C (-0.05 to 0.40) 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 45 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Pierson
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.17 C (-0.05 to 0.40) per decade
0.3 F (-0.1 to 0.7) per decade
1933 to 1983
45
Not clearly different from zero
Mean daily maximum
0.1 C (-0.2 to 0.3) per decade
0.1 F (-0.4 to 0.6) per decade
1933 to 1983
45
Not clearly different from zero
Mean daily minimum
0.3 C (0.1 to 0.5) per decade
0.5 F (0.2 to 0.9) per decade
1933 to 1983
45
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 1983
Yearly extremes at Pierson: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.8 C (109.0 F)
1936
36.1 C (97.0 F)
75
Coldest night (TNn)
-47.8 C (-54.0 F)
1936
-37.2 C (-35.0 F)
75
Wettest day (Rx1day)
160.0 mm (6.3 in)
1935
38.4 mm (1.5 in)
75
Wettest five days (Rx5day)
213.3 mm (8.4 in)
1935
55.1 mm (2.2 in)
75
Longest dry spell (CDD)
90 days
1939
28 days
75
Hottest day (TXx)
The hottest day of the year at Pierson, 1904 to 1983. The record is 42.8 C (109.0 F) in 1936, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Pierson by year
Year
Hottest day (TXx)
1904
31.7 C (89.1 F)
1905
31.7 C (89.1 F)
1908
33.3 C (91.9 F)
1909
33.9 C (93.0 F)
1910
38.9 C (102.0 F)
1911
35.6 C (96.1 F)
1912
35.6 C (96.1 F)
1913
37.2 C (99.0 F)
1914
37.8 C (100.0 F)
1915
35.0 C (95.0 F)
1916
35.0 C (95.0 F)
1917
39.4 C (102.9 F)
1918
38.3 C (100.9 F)
1919
38.3 C (100.9 F)
1920
36.1 C (97.0 F)
1921
36.1 C (97.0 F)
1922
35.6 C (96.1 F)
1923
35.0 C (95.0 F)
1924
33.9 C (93.0 F)
1925
36.7 C (98.1 F)
1926
37.2 C (99.0 F)
1927
33.3 C (91.9 F)
1928
35.6 C (96.1 F)
1929
37.8 C (100.0 F)
1930
36.7 C (98.1 F)
1931
41.7 C (107.1 F)
1932
39.4 C (102.9 F)
1933
38.9 C (102.0 F)
1934
39.4 C (102.9 F)
1935
36.7 C (98.1 F)
1936
42.8 C (109.0 F)
1937
40.0 C (104.0 F)
1938
35.0 C (95.0 F)
1939
37.8 C (100.0 F)
1940
34.4 C (93.9 F)
1941
35.0 C (95.0 F)
1945
11.1 C (52.0 F)
1946
37.8 C (100.0 F)
1947
35.6 C (96.1 F)
1948
35.6 C (96.1 F)
1949
36.7 C (98.1 F)
1950
32.2 C (90.0 F)
1951
37.8 C (100.0 F)
1952
37.8 C (100.0 F)
1953
33.9 C (93.0 F)
1954
35.6 C (96.1 F)
1955
36.7 C (98.1 F)
1956
36.1 C (97.0 F)
1957
36.7 C (98.1 F)
1958
38.9 C (102.0 F)
1959
38.3 C (100.9 F)
1960
37.2 C (99.0 F)
1961
38.3 C (100.9 F)
1962
33.9 C (93.0 F)
1963
36.1 C (97.0 F)
1964
33.9 C (93.0 F)
1965
36.1 C (97.0 F)
1966
35.0 C (95.0 F)
1967
35.6 C (96.1 F)
1968
36.7 C (98.1 F)
1969
37.2 C (99.0 F)
1970
35.0 C (95.0 F)
1971
38.9 C (102.0 F)
1972
35.0 C (95.0 F)
1973
33.9 C (93.0 F)
1974
35.0 C (95.0 F)
1975
36.1 C (97.0 F)
1976
37.2 C (99.0 F)
1977
35.6 C (96.1 F)
1978
36.7 C (98.1 F)
1979
38.9 C (102.0 F)
1980
38.0 C (100.4 F)
1981
38.0 C (100.4 F)
1982
34.0 C (93.2 F)
1983
37.5 C (99.5 F)
Coldest night (TNn)
The coldest night of the year at Pierson, 1904 to 1983. The record is -47.8 C (-54.0 F) in 1936, marked on the chart; the median year is -37.2 C (-35.0 F).
Coldest night (TNn) at Pierson by year
Year
Coldest night (TNn)
1904
-10.0 C (14.0 F)
1905
-3.9 C (25.0 F)
1908
-12.2 C (10.0 F)
1909
-12.2 C (10.0 F)
1910
-12.2 C (10.0 F)
1911
-12.2 C (10.0 F)
1912
-12.2 C (10.0 F)
1913
-13.9 C (7.0 F)
1914
-13.9 C (7.0 F)
1915
-9.4 C (15.1 F)
1916
-17.8 C (0.0 F)
1917
-17.8 C (0.0 F)
1918
-11.7 C (10.9 F)
1919
-22.2 C (-8.0 F)
1920
-26.1 C (-15.0 F)
1921
-12.2 C (10.0 F)
1922
-37.8 C (-36.0 F)
1923
-34.4 C (-29.9 F)
1924
-9.4 C (15.1 F)
1925
-20.6 C (-5.1 F)
1926
-17.8 C (0.0 F)
1927
-11.1 C (12.0 F)
1928
-17.8 C (0.0 F)
1929
-13.3 C (8.1 F)
1930
-14.4 C (6.1 F)
1931
-13.3 C (8.1 F)
1932
-35.0 C (-31.0 F)
1933
-41.1 C (-42.0 F)
1934
-41.1 C (-42.0 F)
1935
-40.6 C (-41.1 F)
1936
-47.8 C (-54.0 F)
1937
-43.9 C (-47.0 F)
1938
-41.1 C (-42.0 F)
1939
-42.8 C (-45.0 F)
1940
-38.3 C (-36.9 F)
1941
-40.0 C (-40.0 F)
1945
-35.6 C (-32.1 F)
1946
-37.8 C (-36.0 F)
1947
-38.9 C (-38.0 F)
1948
-40.0 C (-40.0 F)
1949
-43.9 C (-47.0 F)
1950
-42.8 C (-45.0 F)
1951
-42.2 C (-44.0 F)
1952
-36.7 C (-34.1 F)
1953
-37.2 C (-35.0 F)
1954
-44.4 C (-47.9 F)
1955
-39.4 C (-38.9 F)
1956
-36.7 C (-34.1 F)
1957
-35.6 C (-32.1 F)
1958
-38.3 C (-36.9 F)
1959
-37.2 C (-35.0 F)
1960
-37.2 C (-35.0 F)
1961
-37.2 C (-35.0 F)
1962
-45.0 C (-49.0 F)
1963
-37.2 C (-35.0 F)
1964
-33.9 C (-29.0 F)
1965
-36.1 C (-33.0 F)
1966
-40.0 C (-40.0 F)
1967
-38.3 C (-36.9 F)
1968
-39.4 C (-38.9 F)
1969
-38.9 C (-38.0 F)
1970
-38.3 C (-36.9 F)
1971
-38.3 C (-36.9 F)
1972
-39.4 C (-38.9 F)
1973
-36.1 C (-33.0 F)
1974
-37.2 C (-35.0 F)
1975
-33.9 C (-29.0 F)
1976
-36.1 C (-33.0 F)
1977
-37.2 C (-35.0 F)
1978
-39.4 C (-38.9 F)
1979
-37.2 C (-35.0 F)
1980
-36.5 C (-33.7 F)
1981
-34.5 C (-30.1 F)
1982
-38.0 C (-36.4 F)
1983
-42.0 C (-43.6 F)
Wettest day (Rx1day)
The wettest day of the year at Pierson, 1904 to 1983. The record is 160.0 mm (6.3 in) in 1935, marked on the chart; the median year is 38.4 mm (1.5 in).
Wettest day (Rx1day) at Pierson by year
Year
Wettest day (Rx1day)
1904
23.6 mm (0.9 in)
1905
25.4 mm (1.0 in)
1908
40.6 mm (1.6 in)
1909
36.1 mm (1.4 in)
1910
19.1 mm (0.8 in)
1911
73.7 mm (2.9 in)
1912
27.9 mm (1.1 in)
1913
48.3 mm (1.9 in)
1914
71.1 mm (2.8 in)
1915
21.6 mm (0.9 in)
1916
76.2 mm (3.0 in)
1917
31.8 mm (1.3 in)
1918
61.0 mm (2.4 in)
1919
36.8 mm (1.4 in)
1920
16.5 mm (0.6 in)
1921
24.1 mm (0.9 in)
1922
26.7 mm (1.1 in)
1923
57.2 mm (2.3 in)
1924
63.5 mm (2.5 in)
1925
31.8 mm (1.3 in)
1926
30.5 mm (1.2 in)
1927
63.5 mm (2.5 in)
1928
55.9 mm (2.2 in)
1929
25.9 mm (1.0 in)
1930
16.8 mm (0.7 in)
1931
15.2 mm (0.6 in)
1932
31.0 mm (1.2 in)
1933
29.2 mm (1.1 in)
1934
37.6 mm (1.5 in)
1935
160.0 mm (6.3 in)
1936
50.8 mm (2.0 in)
1937
47.5 mm (1.9 in)
1938
35.6 mm (1.4 in)
1939
118.9 mm (4.7 in)
1940
38.1 mm (1.5 in)
1941
84.8 mm (3.3 in)
1945
1.5 mm (0.06 in)
1946
35.6 mm (1.4 in)
1947
38.6 mm (1.5 in)
1948
61.0 mm (2.4 in)
1949
54.9 mm (2.2 in)
1950
42.2 mm (1.7 in)
1951
35.6 mm (1.4 in)
1952
43.4 mm (1.7 in)
1953
36.3 mm (1.4 in)
1954
71.9 mm (2.8 in)
1955
34.8 mm (1.4 in)
1956
35.6 mm (1.4 in)
1957
41.9 mm (1.6 in)
1958
28.4 mm (1.1 in)
1959
30.7 mm (1.2 in)
1960
42.4 mm (1.7 in)
1961
40.9 mm (1.6 in)
1962
47.2 mm (1.9 in)
1963
44.5 mm (1.8 in)
1964
33.3 mm (1.3 in)
1965
63.5 mm (2.5 in)
1966
22.1 mm (0.9 in)
1967
20.8 mm (0.8 in)
1968
43.2 mm (1.7 in)
1969
41.4 mm (1.6 in)
1970
49.3 mm (1.9 in)
1971
72.6 mm (2.9 in)
1972
38.4 mm (1.5 in)
1973
82.3 mm (3.2 in)
1974
39.4 mm (1.6 in)
1975
47.0 mm (1.9 in)
1976
35.8 mm (1.4 in)
1977
26.7 mm (1.1 in)
1978
39.4 mm (1.6 in)
1979
22.1 mm (0.9 in)
1980
52.0 mm (2.0 in)
1981
19.8 mm (0.8 in)
1982
45.0 mm (1.8 in)
1983
21.2 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Pierson, 1904 to 1983. The record is 213.3 mm (8.4 in) in 1935, marked on the chart; the median year is 55.1 mm (2.2 in).
Wettest five days (Rx5day) at Pierson by year
Year
Wettest five days (Rx5day)
1904
48.5 mm (1.9 in)
1905
29.0 mm (1.1 in)
1908
69.3 mm (2.7 in)
1909
48.3 mm (1.9 in)
1910
27.9 mm (1.1 in)
1911
94.0 mm (3.7 in)
1912
42.1 mm (1.7 in)
1913
113.0 mm (4.4 in)
1914
96.5 mm (3.8 in)
1915
42.4 mm (1.7 in)
1916
87.9 mm (3.5 in)
1917
47.0 mm (1.9 in)
1918
92.8 mm (3.7 in)
1919
45.8 mm (1.8 in)
1920
24.1 mm (0.9 in)
1921
46.8 mm (1.8 in)
1922
47.8 mm (1.9 in)
1923
82.6 mm (3.3 in)
1924
116.8 mm (4.6 in)
1925
34.2 mm (1.3 in)
1926
50.8 mm (2.0 in)
1927
82.8 mm (3.3 in)
1928
88.8 mm (3.5 in)
1929
27.9 mm (1.1 in)
1930
25.9 mm (1.0 in)
1931
23.9 mm (0.9 in)
1932
49.5 mm (1.9 in)
1933
68.0 mm (2.7 in)
1934
41.4 mm (1.6 in)
1935
213.3 mm (8.4 in)
1936
58.4 mm (2.3 in)
1937
59.7 mm (2.4 in)
1938
45.6 mm (1.8 in)
1939
119.7 mm (4.7 in)
1940
62.5 mm (2.5 in)
1941
95.7 mm (3.8 in)
1945
2.5 mm (0.10 in)
1946
41.7 mm (1.6 in)
1947
102.3 mm (4.0 in)
1948
72.6 mm (2.9 in)
1949
96.4 mm (3.8 in)
1950
52.9 mm (2.1 in)
1951
40.7 mm (1.6 in)
1952
74.2 mm (2.9 in)
1953
49.0 mm (1.9 in)
1954
103.6 mm (4.1 in)
1955
44.5 mm (1.8 in)
1956
54.2 mm (2.1 in)
1957
57.7 mm (2.3 in)
1958
38.3 mm (1.5 in)
1959
70.4 mm (2.8 in)
1960
44.2 mm (1.7 in)
1961
54.8 mm (2.2 in)
1962
51.8 mm (2.0 in)
1963
132.9 mm (5.2 in)
1964
82.8 mm (3.3 in)
1965
73.7 mm (2.9 in)
1966
41.9 mm (1.6 in)
1967
21.9 mm (0.9 in)
1968
74.7 mm (2.9 in)
1969
62.8 mm (2.5 in)
1970
55.1 mm (2.2 in)
1971
81.0 mm (3.2 in)
1972
65.6 mm (2.6 in)
1973
89.9 mm (3.5 in)
1974
52.9 mm (2.1 in)
1975
77.7 mm (3.1 in)
1976
66.2 mm (2.6 in)
1977
51.5 mm (2.0 in)
1978
49.3 mm (1.9 in)
1979
51.5 mm (2.0 in)
1980
63.6 mm (2.5 in)
1981
29.4 mm (1.2 in)
1982
62.4 mm (2.5 in)
1983
59.6 mm (2.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Pierson, 1904 to 1983. The record is 90 days in 1939, marked on the chart; the median year is 28 days.
Longest dry spell (CDD) at Pierson by year
Year
Longest dry spell (CDD)
1904
14 days
1905
21 days
1908
25 days
1909
33 days
1910
15 days
1911
18 days
1912
20 days
1913
19 days
1914
24 days
1915
41 days
1916
20 days
1917
56 days
1918
24 days
1919
28 days
1920
30 days
1921
14 days
1922
37 days
1923
30 days
1924
30 days
1925
18 days
1926
14 days
1927
14 days
1928
31 days
1929
22 days
1930
22 days
1931
39 days
1932
27 days
1933
34 days
1934
42 days
1935
39 days
1936
29 days
1937
39 days
1938
36 days
1939
90 days
1940
25 days
1941
20 days
1945
53 days
1946
26 days
1947
26 days
1948
56 days
1949
22 days
1950
15 days
1951
24 days
1952
35 days
1953
33 days
1954
69 days
1955
19 days
1956
16 days
1957
46 days
1958
26 days
1959
25 days
1960
56 days
1961
57 days
1962
40 days
1963
44 days
1964
27 days
1965
44 days
1966
22 days
1967
29 days
1968
26 days
1969
34 days
1970
24 days
1971
30 days
1972
26 days
1973
42 days
1974
48 days
1975
26 days
1976
39 days
1977
52 days
1978
31 days
1979
26 days
1980
87 days
1981
49 days
1982
23 days
1983
24 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
45 years with a frost
Across 45 years with a frost, the median last spring frost at Pierson falls on 21 May and the median first autumn frost on 14 September, which leaves a median of 113 days between them.
Fitted over all years, the growing season changes by +4.9 days per decade at this station.
Frost dates and growing season at Pierson
Measure
Median, all years
Earliest period
Recent period (1954 to 1983)
Recent against earliest
Fitted trend
Last spring frost
21 May
n/a
18 May
n/a
-3.4 days per decade
First autumn frost
14 September
n/a
13 September
n/a
+1.6 days per decade
Growing days
113 days
n/a
120 days
n/a
+4.9 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
45 years, 1934 to 1983
A day with at least 39.3 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 144.1 mm (5.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Pierson: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
39.3 mm (1.5 in)
5 years
56.0 mm (2.2 in)
10 years
70.6 mm (2.8 in)
25 years
94.3 mm (3.7 in)
50 years
116.7 mm (4.6 in)
Longer than the 45 years of record
100 years
144.1 mm (5.7 in)
Longer than the 45 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, 45 years of values from 1934 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: 160.0 mm (6.3 in) in 1935; 118.9 mm (4.7 in) in 1939; 82.3 mm (3.2 in) in 1973.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Pierson standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Pierson 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.