Record envelope, standing records and threshold days for Alva 1W (USC00340193), Oklahoma, United States, with 133 years of record.
Key Facts for Alva 1W
Alva 1W (USC00340193) is a weather station in Oklahoma, United States at 36.80 latitude and -98.69 longitude, 446 m (1,464 ft) above sea level.
The station reports from 1894 to 2026, 133 years of record.
1,464 records set at Alva 1W still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Alva 1W set a daily record precipitation of 30.0 mm (1.2 in) on 21 November 2025.
About the Station
Location: Oklahoma, United States, 36.80 latitude, -98.69 longitude.
Elevation: 446 m (1,464 ft).
Period of record: 1894 to 2026, 133 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
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 Alva 1W. 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 Alva 1W, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
29.4 C (84.9 F)
-26.1 C (-15.0 F)
n/a
n/a
Feb
33.9 C (93.0 F)
-26.7 C (-16.1 F)
n/a
n/a
Mar
37.2 C (99.0 F)
-20.6 C (-5.1 F)
n/a
n/a
Apr
37.8 C (100.0 F)
-8.9 C (16.0 F)
n/a
n/a
May
41.7 C (107.1 F)
-3.9 C (25.0 F)
n/a
n/a
Jun
45.6 C (114.1 F)
5.0 C (41.0 F)
n/a
n/a
Jul
48.9 C (120.0 F)
10.6 C (51.1 F)
n/a
n/a
Aug
47.8 C (118.0 F)
7.2 C (45.0 F)
n/a
n/a
Sep
46.1 C (115.0 F)
-0.6 C (30.9 F)
n/a
n/a
Oct
39.4 C (102.9 F)
-12.2 C (10.0 F)
n/a
n/a
Nov
33.3 C (91.9 F)
-15.0 C (5.0 F)
n/a
n/a
Dec
29.4 C (84.9 F)
-26.1 C (-15.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Alva 1W still stand. 1936 holds the most, with 46.
Standing records at Alva 1W by the year they were set
Year set
Standing records
1894
20
1895
23
1896
22
1897
7
1904
8
1905
13
1906
8
1907
22
1908
16
1909
6
1910
8
1911
24
1912
15
1913
25
1914
12
1915
23
1916
19
1917
34
1918
36
1919
14
1920
13
1921
11
1922
13
1923
11
1924
21
1925
19
1926
13
1927
14
1928
17
1929
8
1930
24
1931
18
1932
16
1933
29
1934
14
1935
9
1936
46
1937
9
1938
14
1939
31
1940
17
1941
12
1942
9
1943
26
1944
10
1945
5
1946
21
1947
18
1948
15
1949
11
1950
36
1951
18
1952
18
1953
26
1954
22
1955
13
1956
13
1957
9
1958
9
1959
12
1960
17
1961
8
1962
14
1963
11
1964
11
1965
13
1966
21
1967
19
1968
12
1969
7
1970
13
1971
7
1972
12
1973
12
1974
10
1975
6
1976
7
1977
5
1978
14
1979
9
1980
10
1981
9
1989
26
1990
7
1991
13
1992
6
1993
7
1994
4
1995
8
1996
14
1997
7
1998
6
1999
9
2000
18
2001
3
2002
6
2003
8
2004
17
2005
11
2006
14
2007
8
All-Time Record Progression
5 new records
5 all-time records were set at Alva 1W between 17 August 1932 and 26 February 2013. Each dot is a new record.
When Alva 1W set new all-time records
Date
Kind
Detail
1932-08-17
Record daily precipitation
Record daily precipitation 176.8 mm (7.0 in)
1933-02-08
Record low minimum temperature
Record low minimum temperature -26.7 C (-16.1 F)
1936-07-18
Record high maximum temperature
Record high maximum temperature 48.9 C (120.0 F)
2013-02-26
Record daily snowfall
Record daily snowfall 36.1 cm (14.2 in)
2013-02-26
Record snow depth
Record snow depth 61.0 cm (24.0 in)
Wettest Day of Each Month
Aug: 176.8 mm (7.0 in)
The wettest day on record for each calendar month at Alva 1W. The most was 176.8 mm (7.0 in) on 17 August 1932.
Record daily precipitation for each month at Alva 1W
Month
Record daily precipitation (mm)
Date
Jan
55.1 mm (2.2 in)
16 January 2017
Feb
59.2 mm (2.3 in)
16 February 1911
Mar
64.0 mm (2.5 in)
23 March 2000
Apr
78.0 mm (3.1 in)
27 April 1938
May
107.4 mm (4.2 in)
16 May 1957
Jun
110.7 mm (4.4 in)
23 June 1963
Jul
91.9 mm (3.6 in)
5 July 2010
Aug
176.8 mm (7.0 in)
17 August 1932
Sep
122.9 mm (4.8 in)
6 September 1920
Oct
116.8 mm (4.6 in)
3 October 2002
Nov
91.4 mm (3.6 in)
13 November 1909
Dec
58.9 mm (2.3 in)
27 December 2018
Period of Record Coverage
1894 to 2008
Complete yearUnder 90 percent of days
103 years of record at Alva 1W, 1894 to 2008. 14 years have data for under 90 percent of days and are left out of rankings: 1894, 1895, 1897, 1904, 1905, 1908, 1909, 1910 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 84 complete years at Alva 1W, 1896 to 2008. Blue stripes are years cooler than the station's own mean of 15.2 C (59.4 F); red stripes are warmer. The coolest year was 1915, at 13.2 C (55.7 F), and the warmest was 1946, at 17.7 C (63.8 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Alva 1W as warming stripes, 1896 to 2008
Year
Annual mean temperature
Difference from the station mean
1896
15.1 C
-0.07 C
1906
14.5 C
-0.66 C
1907
15.2 C
-0.03 C
1912
13.6 C
-1.58 C
1913
14.2 C
-0.96 C
1915
13.2 C
-2.02 C
1916
13.7 C
-1.49 C
1918
14.3 C
-0.87 C
1919
14.3 C
-0.92 C
1920
14.4 C
-0.81 C
1921
16.0 C
+0.79 C
1922
15.3 C
+0.07 C
1923
14.9 C
-0.29 C
1924
13.7 C
-1.45 C
1925
15.2 C
+0.04 C
1926
15.1 C
-0.13 C
1927
15.5 C
+0.29 C
1928
15.6 C
+0.41 C
1929
14.5 C
-0.73 C
1930
15.7 C
+0.55 C
1931
16.1 C
+0.87 C
1932
14.7 C
-0.47 C
1933
16.5 C
+1.35 C
1934
16.3 C
+1.13 C
1935
16.1 C
+0.86 C
1936
16.1 C
+0.94 C
1937
15.1 C
-0.07 C
1938
16.8 C
+1.60 C
1939
17.1 C
+1.92 C
1940
15.4 C
+0.19 C
1941
16.0 C
+0.77 C
1942
15.7 C
+0.54 C
1943
16.2 C
+1.05 C
1944
16.1 C
+0.95 C
1945
15.7 C
+0.52 C
1946
17.7 C
+2.46 C
1948
14.3 C
-0.93 C
1950
14.4 C
-0.75 C
1953
16.4 C
+1.20 C
1954
17.1 C
+1.90 C
1955
15.5 C
+0.33 C
1956
16.5 C
+1.26 C
1957
14.5 C
-0.73 C
1958
14.6 C
-0.61 C
1959
14.6 C
-0.62 C
1960
14.0 C
-1.15 C
1961
14.2 C
-1.01 C
1962
15.4 C
+0.20 C
1963
15.7 C
+0.51 C
1964
15.3 C
+0.15 C
1965
15.3 C
+0.13 C
1966
14.7 C
-0.49 C
1967
15.2 C
+0.01 C
1968
14.7 C
-0.50 C
1969
14.9 C
-0.29 C
1970
15.2 C
+0.05 C
1971
15.3 C
+0.07 C
1972
14.8 C
-0.36 C
1973
14.8 C
-0.35 C
1974
15.1 C
-0.14 C
1975
14.8 C
-0.40 C
1976
15.4 C
+0.23 C
1977
16.3 C
+1.11 C
1978
14.9 C
-0.34 C
1979
14.3 C
-0.85 C
1980
16.1 C
+0.89 C
1989
14.4 C
-0.78 C
1990
16.1 C
+0.94 C
1991
16.1 C
+0.93 C
1992
15.4 C
+0.19 C
1993
14.2 C
-0.96 C
1994
15.7 C
+0.49 C
1995
15.1 C
-0.06 C
1996
15.1 C
-0.11 C
1997
14.8 C
-0.43 C
1998
15.9 C
+0.71 C
1999
15.3 C
+0.12 C
2001
15.5 C
+0.33 C
2002
14.5 C
-0.72 C
2003
14.4 C
-0.75 C
2004
14.0 C
-1.22 C
2005
14.2 C
-1.04 C
2006
15.1 C
-0.11 C
2008
14.8 C
-0.41 C
The fitted trend in annual mean temperature here over 1896 to 2008 is 0.00 C (-0.06 to 0.06) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.00 F (-0.12 to 0.12) per decade. The slope is a straight line fitted to 84 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Alva 1W
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.00 C (-0.06 to 0.06) per decade
0.00 F (-0.12 to 0.12) per decade
1896 to 2008
84
Not clearly different from zero
Mean daily maximum
-0.02 C (-0.11 to 0.07) per decade
-0.03 F (-0.19 to 0.13) per decade
1896 to 2008
84
Not clearly different from zero
Mean daily minimum
0.02 C (-0.04 to 0.08) per decade
0.03 F (-0.08 to 0.14) per decade
1896 to 2008
84
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
1894 to 2026
Yearly extremes at Alva 1W: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
48.9 C (120.0 F)
1936
42.2 C (108.0 F)
103
Coldest night (TNn)
-26.7 C (-16.1 F)
1933
-17.8 C (0.0 F)
103
Wettest day (Rx1day)
176.8 mm (7.0 in)
1932
61.9 mm (2.4 in)
120
Wettest five days (Rx5day)
223.2 mm (8.8 in)
1920
92.5 mm (3.6 in)
120
Longest dry spell (CDD)
88 days
1955
36 days
120
Hottest day (TXx)
The hottest day of the year at Alva 1W, 1894 to 2026. The record is 48.9 C (120.0 F) in 1936, marked on the chart; the median year is 42.2 C (108.0 F).
Hottest day (TXx) at Alva 1W by year
Year
Hottest day (TXx)
1894
44.4 C (111.9 F)
1895
40.6 C (105.1 F)
1896
44.4 C (111.9 F)
1897
42.8 C (109.0 F)
1904
40.6 C (105.1 F)
1905
42.2 C (108.0 F)
1906
37.2 C (99.0 F)
1907
38.9 C (102.0 F)
1908
34.4 C (93.9 F)
1909
35.0 C (95.0 F)
1910
37.8 C (100.0 F)
1911
45.6 C (114.1 F)
1912
42.2 C (108.0 F)
1913
42.2 C (108.0 F)
1914
42.2 C (108.0 F)
1915
37.2 C (99.0 F)
1916
41.7 C (107.1 F)
1917
45.6 C (114.1 F)
1918
42.2 C (108.0 F)
1919
42.8 C (109.0 F)
1920
41.1 C (106.0 F)
1921
41.1 C (106.0 F)
1922
46.1 C (115.0 F)
1923
44.4 C (111.9 F)
1924
42.2 C (108.0 F)
1925
43.9 C (111.0 F)
1926
42.2 C (108.0 F)
1927
40.6 C (105.1 F)
1928
40.0 C (104.0 F)
1929
43.9 C (111.0 F)
1930
45.0 C (113.0 F)
1931
42.2 C (108.0 F)
1932
42.8 C (109.0 F)
1933
45.0 C (113.0 F)
1934
44.4 C (111.9 F)
1935
44.4 C (111.9 F)
1936
48.9 C (120.0 F)
1937
45.0 C (113.0 F)
1938
42.2 C (108.0 F)
1939
46.1 C (115.0 F)
1940
44.4 C (111.9 F)
1941
41.7 C (107.1 F)
1942
42.8 C (109.0 F)
1943
45.6 C (114.1 F)
1944
45.0 C (113.0 F)
1945
43.9 C (111.0 F)
1946
47.2 C (117.0 F)
1947
46.1 C (115.0 F)
1948
43.3 C (109.9 F)
1949
40.6 C (105.1 F)
1950
43.9 C (111.0 F)
1951
43.3 C (109.9 F)
1952
45.0 C (113.0 F)
1953
42.8 C (109.0 F)
1954
45.6 C (114.1 F)
1955
40.6 C (105.1 F)
1956
43.9 C (111.0 F)
1957
40.6 C (105.1 F)
1958
41.7 C (107.1 F)
1959
42.2 C (108.0 F)
1960
40.6 C (105.1 F)
1961
41.1 C (106.0 F)
1962
42.2 C (108.0 F)
1963
41.1 C (106.0 F)
1964
44.4 C (111.9 F)
1965
40.6 C (105.1 F)
1966
41.7 C (107.1 F)
1967
40.6 C (105.1 F)
1968
42.2 C (108.0 F)
1969
42.8 C (109.0 F)
1970
42.8 C (109.0 F)
1971
43.3 C (109.9 F)
1972
40.6 C (105.1 F)
1973
42.2 C (108.0 F)
1974
43.3 C (109.9 F)
1975
41.1 C (106.0 F)
1976
42.8 C (109.0 F)
1977
41.1 C (106.0 F)
1978
44.4 C (111.9 F)
1979
40.0 C (104.0 F)
1980
44.4 C (111.9 F)
1981
34.4 C (93.9 F)
1988
26.1 C (79.0 F)
1989
40.0 C (104.0 F)
1990
42.2 C (108.0 F)
1991
42.8 C (109.0 F)
1992
38.9 C (102.0 F)
1993
40.6 C (105.1 F)
1994
42.2 C (108.0 F)
1995
42.8 C (109.0 F)
1996
45.0 C (113.0 F)
1997
41.7 C (107.1 F)
1998
42.2 C (108.0 F)
1999
42.2 C (108.0 F)
2000
44.4 C (111.9 F)
2001
43.3 C (109.9 F)
2002
40.0 C (104.0 F)
2003
42.2 C (108.0 F)
2004
38.9 C (102.0 F)
2005
40.0 C (104.0 F)
2006
42.8 C (109.0 F)
2007
40.0 C (104.0 F)
2008
42.8 C (109.0 F)
2010
n/a
2011
n/a
2012
n/a
2013
n/a
2014
n/a
2015
n/a
2016
n/a
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Coldest night (TNn)
The coldest night of the year at Alva 1W, 1894 to 2026. The record is -26.7 C (-16.1 F) in 1933, marked on the chart; the median year is -17.8 C (0.0 F).
Coldest night (TNn) at Alva 1W by year
Year
Coldest night (TNn)
1894
-22.2 C (-8.0 F)
1895
-12.8 C (9.0 F)
1896
-13.9 C (7.0 F)
1897
-11.1 C (12.0 F)
1904
-14.4 C (6.1 F)
1905
-25.6 C (-14.1 F)
1906
-13.9 C (7.0 F)
1907
-15.0 C (5.0 F)
1908
-16.7 C (1.9 F)
1909
-17.8 C (0.0 F)
1910
-15.6 C (3.9 F)
1911
-16.1 C (3.0 F)
1912
-25.6 C (-14.1 F)
1913
-24.4 C (-11.9 F)
1914
-18.3 C (-0.9 F)
1915
-16.1 C (3.0 F)
1916
-23.3 C (-9.9 F)
1917
-21.7 C (-7.1 F)
1918
-23.3 C (-9.9 F)
1919
-20.0 C (-4.0 F)
1920
-18.3 C (-0.9 F)
1921
-15.0 C (5.0 F)
1922
-18.9 C (-2.0 F)
1923
-17.2 C (1.0 F)
1924
-20.6 C (-5.1 F)
1925
-17.2 C (1.0 F)
1926
-16.7 C (1.9 F)
1927
-18.9 C (-2.0 F)
1928
-18.9 C (-2.0 F)
1929
-20.0 C (-4.0 F)
1930
-26.1 C (-15.0 F)
1931
-11.7 C (10.9 F)
1932
-23.3 C (-9.9 F)
1933
-26.7 C (-16.1 F)
1934
-15.0 C (5.0 F)
1935
-20.6 C (-5.1 F)
1936
-20.6 C (-5.1 F)
1937
-16.7 C (1.9 F)
1938
-15.6 C (3.9 F)
1939
-16.7 C (1.9 F)
1940
-20.6 C (-5.1 F)
1941
-8.3 C (17.1 F)
1942
-22.8 C (-9.0 F)
1943
-24.4 C (-11.9 F)
1944
-14.4 C (6.1 F)
1945
-16.1 C (3.0 F)
1946
-14.4 C (6.1 F)
1947
-26.1 C (-15.0 F)
1948
-20.6 C (-5.1 F)
1949
-18.3 C (-0.9 F)
1950
-17.2 C (1.0 F)
1951
-22.8 C (-9.0 F)
1952
-13.3 C (8.1 F)
1953
-12.8 C (9.0 F)
1954
-16.1 C (3.0 F)
1955
-13.3 C (8.1 F)
1956
-15.0 C (5.0 F)
1957
-15.0 C (5.0 F)
1958
-18.9 C (-2.0 F)
1959
-23.9 C (-11.0 F)
1960
-18.9 C (-2.0 F)
1961
-20.6 C (-5.1 F)
1962
-20.6 C (-5.1 F)
1963
-21.7 C (-7.1 F)
1964
-17.8 C (0.0 F)
1965
-16.1 C (3.0 F)
1966
-18.9 C (-2.0 F)
1967
-16.7 C (1.9 F)
1968
-18.3 C (-0.9 F)
1969
-13.9 C (7.0 F)
1970
-17.2 C (1.0 F)
1971
-18.3 C (-0.9 F)
1972
-22.2 C (-8.0 F)
1973
-19.4 C (-2.9 F)
1974
-22.2 C (-8.0 F)
1975
-15.0 C (5.0 F)
1976
-18.9 C (-2.0 F)
1977
-17.8 C (0.0 F)
1978
-20.0 C (-4.0 F)
1979
-20.6 C (-5.1 F)
1980
-15.6 C (3.9 F)
1981
-20.6 C (-5.1 F)
1988
-7.2 C (19.0 F)
1989
-26.1 C (-15.0 F)
1990
-18.9 C (-2.0 F)
1991
-13.9 C (7.0 F)
1992
-10.6 C (12.9 F)
1993
-17.8 C (0.0 F)
1994
-16.7 C (1.9 F)
1995
-13.3 C (8.1 F)
1996
-21.1 C (-6.0 F)
1997
-16.7 C (1.9 F)
1998
-18.3 C (-0.9 F)
1999
-13.9 C (7.0 F)
2000
-15.6 C (3.9 F)
2001
-13.9 C (7.0 F)
2002
-16.1 C (3.0 F)
2003
-16.7 C (1.9 F)
2004
-19.4 C (-2.9 F)
2005
-18.9 C (-2.0 F)
2006
-18.3 C (-0.9 F)
2007
-16.1 C (3.0 F)
2008
-18.3 C (-0.9 F)
2010
n/a
2011
n/a
2012
n/a
2013
n/a
2014
n/a
2015
n/a
2016
n/a
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Wettest day (Rx1day)
The wettest day of the year at Alva 1W, 1894 to 2026. The record is 176.8 mm (7.0 in) in 1932, marked on the chart; the median year is 61.9 mm (2.4 in).
Wettest day (Rx1day) at Alva 1W by year
Year
Wettest day (Rx1day)
1894
63.8 mm (2.5 in)
1895
97.8 mm (3.9 in)
1896
76.2 mm (3.0 in)
1897
57.2 mm (2.3 in)
1904
37.8 mm (1.5 in)
1905
38.1 mm (1.5 in)
1906
74.7 mm (2.9 in)
1907
48.0 mm (1.9 in)
1908
51.3 mm (2.0 in)
1909
91.4 mm (3.6 in)
1910
55.9 mm (2.2 in)
1911
95.3 mm (3.8 in)
1912
59.7 mm (2.4 in)
1913
53.3 mm (2.1 in)
1914
42.2 mm (1.7 in)
1915
82.6 mm (3.3 in)
1916
106.7 mm (4.2 in)
1917
43.7 mm (1.7 in)
1918
69.6 mm (2.7 in)
1919
53.6 mm (2.1 in)
1920
122.9 mm (4.8 in)
1921
45.0 mm (1.8 in)
1922
63.5 mm (2.5 in)
1923
58.4 mm (2.3 in)
1924
52.6 mm (2.1 in)
1925
54.6 mm (2.1 in)
1926
89.2 mm (3.5 in)
1927
104.6 mm (4.1 in)
1928
73.4 mm (2.9 in)
1929
75.4 mm (3.0 in)
1930
43.9 mm (1.7 in)
1931
87.6 mm (3.4 in)
1932
176.8 mm (7.0 in)
1933
72.6 mm (2.9 in)
1934
55.4 mm (2.2 in)
1935
77.2 mm (3.0 in)
1936
62.0 mm (2.4 in)
1937
53.8 mm (2.1 in)
1938
78.0 mm (3.1 in)
1939
43.4 mm (1.7 in)
1940
40.9 mm (1.6 in)
1941
56.1 mm (2.2 in)
1942
59.4 mm (2.3 in)
1943
53.8 mm (2.1 in)
1944
64.0 mm (2.5 in)
1945
95.5 mm (3.8 in)
1946
51.6 mm (2.0 in)
1947
42.4 mm (1.7 in)
1948
70.4 mm (2.8 in)
1949
55.6 mm (2.2 in)
1950
31.8 mm (1.3 in)
1951
73.7 mm (2.9 in)
1952
53.8 mm (2.1 in)
1953
61.0 mm (2.4 in)
1954
54.6 mm (2.1 in)
1955
73.4 mm (2.9 in)
1956
35.1 mm (1.4 in)
1957
107.4 mm (4.2 in)
1958
60.2 mm (2.4 in)
1959
65.5 mm (2.6 in)
1960
122.9 mm (4.8 in)
1961
95.8 mm (3.8 in)
1962
59.9 mm (2.4 in)
1963
110.7 mm (4.4 in)
1964
58.2 mm (2.3 in)
1965
44.7 mm (1.8 in)
1966
68.1 mm (2.7 in)
1967
83.1 mm (3.3 in)
1968
49.8 mm (2.0 in)
1969
71.4 mm (2.8 in)
1970
75.9 mm (3.0 in)
1971
76.7 mm (3.0 in)
1972
51.6 mm (2.0 in)
1973
65.0 mm (2.6 in)
1974
46.5 mm (1.8 in)
1975
70.6 mm (2.8 in)
1976
52.6 mm (2.1 in)
1977
98.6 mm (3.9 in)
1978
46.7 mm (1.8 in)
1979
58.7 mm (2.3 in)
1980
64.3 mm (2.5 in)
1981
39.1 mm (1.5 in)
1988
17.5 mm (0.7 in)
1989
57.4 mm (2.3 in)
1990
53.3 mm (2.1 in)
1991
85.3 mm (3.4 in)
1992
75.4 mm (3.0 in)
1993
90.4 mm (3.6 in)
1994
70.4 mm (2.8 in)
1995
62.0 mm (2.4 in)
1996
61.7 mm (2.4 in)
1997
43.2 mm (1.7 in)
1998
99.8 mm (3.9 in)
1999
74.9 mm (2.9 in)
2000
101.1 mm (4.0 in)
2001
42.2 mm (1.7 in)
2002
116.8 mm (4.6 in)
2003
41.9 mm (1.6 in)
2004
61.0 mm (2.4 in)
2005
50.8 mm (2.0 in)
2006
61.0 mm (2.4 in)
2007
50.8 mm (2.0 in)
2008
63.5 mm (2.5 in)
2010
91.9 mm (3.6 in)
2011
49.8 mm (2.0 in)
2012
66.0 mm (2.6 in)
2013
78.7 mm (3.1 in)
2014
86.9 mm (3.4 in)
2015
57.7 mm (2.3 in)
2016
59.9 mm (2.4 in)
2017
55.1 mm (2.2 in)
2018
102.1 mm (4.0 in)
2019
95.5 mm (3.8 in)
2020
70.4 mm (2.8 in)
2021
53.6 mm (2.1 in)
2022
44.2 mm (1.7 in)
2023
66.3 mm (2.6 in)
2024
64.8 mm (2.6 in)
2025
71.4 mm (2.8 in)
2026
29.7 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Alva 1W, 1894 to 2026. The record is 223.2 mm (8.8 in) in 1920, marked on the chart; the median year is 92.5 mm (3.6 in).
Wettest five days (Rx5day) at Alva 1W by year
Year
Wettest five days (Rx5day)
1894
76.8 mm (3.0 in)
1895
57.2 mm (2.3 in)
1896
114.3 mm (4.5 in)
1897
81.3 mm (3.2 in)
1904
60.6 mm (2.4 in)
1905
63.8 mm (2.5 in)
1906
115.1 mm (4.5 in)
1907
82.3 mm (3.2 in)
1908
87.8 mm (3.5 in)
1909
118.8 mm (4.7 in)
1910
71.6 mm (2.8 in)
1911
141.0 mm (5.6 in)
1912
104.1 mm (4.1 in)
1913
75.6 mm (3.0 in)
1914
64.8 mm (2.6 in)
1915
119.9 mm (4.7 in)
1916
122.7 mm (4.8 in)
1917
81.4 mm (3.2 in)
1918
102.1 mm (4.0 in)
1919
62.3 mm (2.5 in)
1920
223.2 mm (8.8 in)
1921
98.1 mm (3.9 in)
1922
73.7 mm (2.9 in)
1923
106.5 mm (4.2 in)
1924
100.4 mm (4.0 in)
1925
91.1 mm (3.6 in)
1926
114.9 mm (4.5 in)
1927
134.0 mm (5.3 in)
1928
117.9 mm (4.6 in)
1929
77.8 mm (3.1 in)
1930
83.3 mm (3.3 in)
1931
138.4 mm (5.4 in)
1932
200.2 mm (7.9 in)
1933
83.3 mm (3.3 in)
1934
70.6 mm (2.8 in)
1935
117.1 mm (4.6 in)
1936
74.7 mm (2.9 in)
1937
92.2 mm (3.6 in)
1938
107.7 mm (4.2 in)
1939
51.8 mm (2.0 in)
1940
65.3 mm (2.6 in)
1941
102.7 mm (4.0 in)
1942
61.2 mm (2.4 in)
1943
73.6 mm (2.9 in)
1944
113.5 mm (4.5 in)
1945
121.6 mm (4.8 in)
1946
107.2 mm (4.2 in)
1947
78.8 mm (3.1 in)
1948
119.8 mm (4.7 in)
1949
75.2 mm (3.0 in)
1950
68.8 mm (2.7 in)
1951
148.6 mm (5.9 in)
1952
75.2 mm (3.0 in)
1953
122.3 mm (4.8 in)
1954
69.5 mm (2.7 in)
1955
124.7 mm (4.9 in)
1956
56.1 mm (2.2 in)
1957
151.9 mm (6.0 in)
1958
69.4 mm (2.7 in)
1959
147.1 mm (5.8 in)
1960
128.7 mm (5.1 in)
1961
100.7 mm (4.0 in)
1962
104.1 mm (4.1 in)
1963
115.5 mm (4.5 in)
1964
87.6 mm (3.4 in)
1965
84.0 mm (3.3 in)
1966
83.3 mm (3.3 in)
1967
118.5 mm (4.7 in)
1968
86.1 mm (3.4 in)
1969
76.2 mm (3.0 in)
1970
80.0 mm (3.1 in)
1971
78.2 mm (3.1 in)
1972
60.4 mm (2.4 in)
1973
83.8 mm (3.3 in)
1974
105.5 mm (4.2 in)
1975
92.1 mm (3.6 in)
1976
70.9 mm (2.8 in)
1977
136.5 mm (5.4 in)
1978
97.6 mm (3.8 in)
1979
72.3 mm (2.8 in)
1980
82.6 mm (3.3 in)
1981
67.0 mm (2.6 in)
1988
20.8 mm (0.8 in)
1989
107.7 mm (4.2 in)
1990
71.6 mm (2.8 in)
1991
126.0 mm (5.0 in)
1992
130.3 mm (5.1 in)
1993
184.6 mm (7.3 in)
1994
72.7 mm (2.9 in)
1995
106.7 mm (4.2 in)
1996
88.4 mm (3.5 in)
1997
73.8 mm (2.9 in)
1998
201.9 mm (7.9 in)
1999
96.7 mm (3.8 in)
2000
123.9 mm (4.9 in)
2001
50.6 mm (2.0 in)
2002
142.7 mm (5.6 in)
2003
119.3 mm (4.7 in)
2004
92.7 mm (3.6 in)
2005
108.0 mm (4.3 in)
2006
81.5 mm (3.2 in)
2007
101.6 mm (4.0 in)
2008
83.9 mm (3.3 in)
2010
174.8 mm (6.9 in)
2011
54.6 mm (2.1 in)
2012
80.7 mm (3.2 in)
2013
115.1 mm (4.5 in)
2014
104.2 mm (4.1 in)
2015
91.2 mm (3.6 in)
2016
75.5 mm (3.0 in)
2017
95.6 mm (3.8 in)
2018
183.9 mm (7.2 in)
2019
157.4 mm (6.2 in)
2020
105.2 mm (4.1 in)
2021
59.7 mm (2.4 in)
2022
83.3 mm (3.3 in)
2023
140.7 mm (5.5 in)
2024
115.4 mm (4.5 in)
2025
143.5 mm (5.6 in)
2026
57.7 mm (2.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Alva 1W, 1894 to 2026. The record is 88 days in 1955, marked on the chart; the median year is 36 days.
Longest dry spell (CDD) at Alva 1W by year
Year
Longest dry spell (CDD)
1894
46 days
1895
36 days
1896
36 days
1897
23 days
1904
26 days
1905
36 days
1906
30 days
1907
34 days
1908
32 days
1909
67 days
1910
45 days
1911
44 days
1912
41 days
1913
50 days
1914
32 days
1915
35 days
1916
32 days
1917
50 days
1918
31 days
1919
18 days
1920
38 days
1921
72 days
1922
25 days
1923
56 days
1924
24 days
1925
19 days
1926
40 days
1927
31 days
1928
46 days
1929
28 days
1930
29 days
1931
27 days
1932
31 days
1933
45 days
1934
34 days
1935
30 days
1936
46 days
1937
28 days
1938
46 days
1939
49 days
1940
25 days
1941
18 days
1942
22 days
1943
32 days
1944
28 days
1945
27 days
1946
24 days
1947
39 days
1948
31 days
1949
50 days
1950
58 days
1951
29 days
1952
56 days
1953
24 days
1954
81 days
1955
88 days
1956
70 days
1957
36 days
1958
34 days
1959
39 days
1960
20 days
1961
35 days
1962
37 days
1963
29 days
1964
30 days
1965
43 days
1966
52 days
1967
43 days
1968
33 days
1969
44 days
1970
52 days
1971
54 days
1972
63 days
1973
39 days
1974
44 days
1975
42 days
1976
34 days
1977
33 days
1978
45 days
1979
57 days
1980
40 days
1981
31 days
1988
10 days
1989
45 days
1990
37 days
1991
51 days
1992
27 days
1993
26 days
1994
25 days
1995
37 days
1996
39 days
1997
25 days
1998
33 days
1999
30 days
2000
47 days
2001
40 days
2002
30 days
2003
36 days
2004
34 days
2005
61 days
2006
67 days
2007
56 days
2008
49 days
2010
42 days
2011
35 days
2012
49 days
2013
32 days
2014
22 days
2015
30 days
2016
35 days
2017
49 days
2018
52 days
2019
38 days
2020
44 days
2021
58 days
2022
42 days
2023
57 days
2024
42 days
2025
36 days
2026
35 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
84 years with a frost
Across 84 years with a frost, the median last spring frost at Alva 1W falls on 10 April and the median first autumn frost on 28 October, which leaves a median of 201 days between them.
In 1969 to 2008 the median growing season was 202 days. That is 4 days more than in 1896 to 1940.
Fitted over all years, the growing season changes by +1.1 days per decade at this station.
Frost dates and growing season at Alva 1W
Measure
Median, all years
Earliest period (1896 to 1940)
Recent period (1969 to 2008)
Recent against earliest
Fitted trend
Last spring frost
10 April
13 April
7 April
6 days earlier
-0.5 days per decade
First autumn frost
28 October
28 October
27 October
1 day earlier
+0.6 days per decade
Growing days
201 days
198 days
202 days
4 days more
+1.1 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
106 years, 1896 to 2025
A day with at least 63.3 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 146.1 mm (5.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Alva 1W: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
63.3 mm (2.5 in)
5 years
82.6 mm (3.3 in)
10 years
96.4 mm (3.8 in)
25 years
115.3 mm (4.5 in)
50 years
130.3 mm (5.1 in)
100 years
146.1 mm (5.8 in)
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 106 years of values from 1896 to 2025.
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: 176.8 mm (7.0 in) in 1932; 122.9 mm (4.8 in) in 1920; 122.9 mm (4.8 in) in 1960.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Alva 1W standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Alva 1W 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.