Record envelope, standing records and threshold days for Northwood (USC00136103), Iowa, United States, with 131 years of record.
Key Facts for Northwood
Northwood (USC00136103) is a weather station in Iowa, United States at 43.44 latitude and -93.23 longitude, 363 m (1,190 ft) above sea level.
The station reports from 1896 to 2026, 131 years of record.
1,464 records set at Northwood still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Northwood set a daily record high minimum temperature of 23.9 C (75.0 F) on 27 July 2026.
About the Station
Location: Iowa, United States, 43.44 latitude, -93.23 longitude.
Elevation: 363 m (1,190 ft).
Period of record: 1896 to 2026, 131 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
2 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 Northwood. The lines show the 2026 daily maximum and minimum. 2 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Northwood, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
17.2 C (63.0 F)
-38.3 C (-36.9 F)
6.7 C (44.1 F)
-29.4 C (-20.9 F)
Feb
21.7 C (71.1 F)
-36.7 C (-34.1 F)
15.0 C (59.0 F)
-19.4 C (-2.9 F)
Mar
28.3 C (82.9 F)
-32.8 C (-27.0 F)
27.2 C (81.0 F)
-18.3 C (-0.9 F)
Apr
33.9 C (93.0 F)
-15.6 C (3.9 F)
27.8 C (82.0 F)
-6.7 C (19.9 F)
May
40.6 C (105.1 F)
-6.7 C (19.9 F)
30.6 C (87.1 F)
-1.1 C (30.0 F)
Jun
39.4 C (102.9 F)
0.0 C (32.0 F)
30.6 C (87.1 F)
8.9 C (48.0 F)
Jul
41.7 C (107.1 F)
3.3 C (37.9 F)
31.1 C (88.0 F)
13.3 C (55.9 F)
Aug
39.4 C (102.9 F)
1.7 C (35.1 F)
27.8 C (82.0 F)
9.4 C (48.9 F)
Sep
36.7 C (98.1 F)
-6.7 C (19.9 F)
19.4 C (66.9 F)
11.1 C (52.0 F)
Oct
33.9 C (93.0 F)
-18.9 C (-2.0 F)
n/a
n/a
Nov
26.1 C (79.0 F)
-26.7 C (-16.1 F)
n/a
n/a
Dec
18.9 C (66.0 F)
-32.8 C (-27.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Northwood still stand. 1936 holds the most, with 36.
Standing records at Northwood by the year they were set
Year set
Standing records
1896
18
1897
22
1898
10
1899
28
1900
13
1901
18
1902
9
1903
9
1904
1
1905
4
1906
5
1907
12
1908
8
1909
25
1910
9
1911
11
1912
10
1913
17
1914
7
1915
11
1916
10
1917
16
1918
6
1919
9
1920
6
1921
6
1922
5
1923
15
1924
13
1925
10
1926
4
1927
9
1928
6
1929
15
1930
29
1931
25
1932
9
1933
17
1934
27
1935
9
1936
36
1937
8
1938
6
1939
17
1940
13
1941
9
1942
12
1943
4
1944
15
1945
11
1946
8
1947
17
1948
8
1949
10
1950
12
1951
13
1952
14
1953
9
1954
4
1955
14
1956
7
1957
1
1958
11
1959
11
1960
7
1961
3
1962
17
1963
12
1964
13
1965
16
1966
12
1967
12
1968
12
1969
9
1970
11
1971
2
1972
13
1973
9
1974
9
1975
9
1976
11
1977
24
1978
4
1979
4
1980
8
1981
11
1982
6
1983
17
1984
10
1985
15
1986
9
1987
24
1988
20
1989
12
1990
14
1991
20
1992
9
1993
6
1994
6
1995
6
1996
12
1997
14
1998
10
1999
6
2000
24
2001
11
2002
8
2003
8
2004
10
2005
9
2006
12
2007
8
2008
6
2009
9
2010
6
2011
7
2012
24
2013
4
2014
12
2015
3
2016
2
2017
7
2018
20
2019
9
2020
18
2021
13
2022
1
2023
11
2024
7
2025
5
2026
3
All-Time Record Progression
6 new records
6 all-time records were set at Northwood between 6 September 1927 and 19 August 1990. Each dot is a new record.
When Northwood set new all-time records
Date
Kind
Detail
1927-09-06
Record daily precipitation
Record daily precipitation 165.9 mm (6.5 in)
1936-07-13
Record high maximum temperature
Record high maximum temperature 41.1 C (106.0 F)
1936-07-14
Record high maximum temperature
Record high maximum temperature 41.7 C (107.1 F)
1953-06-19
Record high minimum temperature
Record high minimum temperature 25.6 C (78.1 F)
1987-07-25
Record high minimum temperature
Record high minimum temperature 26.1 C (79.0 F)
1990-08-19
Record daily precipitation
Record daily precipitation 168.9 mm (6.6 in)
Wettest Day of Each Month
Aug: 168.9 mm (6.6 in)
The wettest day on record for each calendar month at Northwood. The most was 168.9 mm (6.6 in) on 19 August 1990.
Record daily precipitation for each month at Northwood
Month
Record daily precipitation (mm)
Date
Jan
45.7 mm (1.8 in)
4 January 1971
Feb
50.8 mm (2.0 in)
22 February 1922
Mar
52.3 mm (2.1 in)
23 March 1966
Apr
71.1 mm (2.8 in)
20 April 1993
May
112.5 mm (4.4 in)
22 May 2004
Jun
128.5 mm (5.1 in)
15 June 1978
Jul
124.5 mm (4.9 in)
24 July 2025
Aug
168.9 mm (6.6 in)
19 August 1990
Sep
165.9 mm (6.5 in)
6 September 1927
Oct
101.1 mm (4.0 in)
5 October 2013
Nov
63.5 mm (2.5 in)
13 November 1909
Dec
38.1 mm (1.5 in)
2 December 2007
Period of Record Coverage
1896 to 2026
Complete yearUnder 90 percent of days
131 years of record at Northwood, 1896 to 2026. 25 years have data for under 90 percent of days and are left out of rankings: 1896, 1904, 1908, 1909, 1911, 1917, 1918, 1919 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 94 complete years at Northwood, 1897 to 2024. Blue stripes are years cooler than the station's own mean of 7.4 C (45.4 F); red stripes are warmer. The coolest year was 2019, at 5.3 C (41.6 F), and the warmest was 1931, at 10.3 C (50.6 F). The strongest colour marks a difference of 3.0 C (5.4 F).
Annual mean temperature at Northwood as warming stripes, 1897 to 2024
Year
Annual mean temperature
Difference from the station mean
1897
6.5 C
-0.95 C
1898
7.1 C
-0.36 C
1899
6.8 C
-0.61 C
1900
8.1 C
+0.65 C
1901
8.1 C
+0.63 C
1902
7.4 C
-0.04 C
1903
6.9 C
-0.48 C
1906
7.6 C
+0.20 C
1907
6.7 C
-0.68 C
1910
7.5 C
+0.07 C
1912
5.7 C
-1.68 C
1913
7.6 C
+0.13 C
1914
7.2 C
-0.23 C
1915
7.0 C
-0.47 C
1916
6.2 C
-1.27 C
1920
6.9 C
-0.51 C
1921
9.1 C
+1.68 C
1922
8.0 C
+0.60 C
1923
7.5 C
+0.10 C
1930
7.9 C
+0.49 C
1931
10.3 C
+2.92 C
1932
6.9 C
-0.52 C
1933
8.2 C
+0.79 C
1934
8.6 C
+1.17 C
1935
7.2 C
-0.25 C
1936
6.6 C
-0.80 C
1937
6.2 C
-1.18 C
1938
8.2 C
+0.75 C
1939
8.4 C
+1.01 C
1940
7.1 C
-0.35 C
1941
8.7 C
+1.24 C
1942
7.5 C
+0.05 C
1943
6.5 C
-0.97 C
1944
8.1 C
+0.68 C
1945
6.6 C
-0.81 C
1946
8.3 C
+0.85 C
1947
7.1 C
-0.35 C
1948
7.6 C
+0.14 C
1949
8.2 C
+0.75 C
1952
7.2 C
-0.23 C
1955
7.8 C
+0.40 C
1957
7.9 C
+0.51 C
1958
7.8 C
+0.40 C
1959
7.4 C
-0.02 C
1960
7.5 C
+0.07 C
1961
7.5 C
+0.09 C
1962
7.3 C
-0.13 C
1963
8.0 C
+0.53 C
1964
8.5 C
+1.09 C
1965
6.9 C
-0.50 C
1966
7.0 C
-0.40 C
1967
7.0 C
-0.39 C
1968
7.8 C
+0.35 C
1969
6.7 C
-0.72 C
1970
7.0 C
-0.42 C
1971
7.6 C
+0.13 C
1972
6.4 C
-1.02 C
1974
7.8 C
+0.37 C
1975
7.8 C
+0.35 C
1976
8.0 C
+0.56 C
1977
8.4 C
+1.02 C
1978
6.8 C
-0.61 C
1979
6.3 C
-1.10 C
1980
8.0 C
+0.58 C
1981
8.6 C
+1.17 C
1982
6.7 C
-0.77 C
1983
7.7 C
+0.32 C
1984
8.1 C
+0.65 C
1985
7.2 C
-0.18 C
1986
8.4 C
+1.02 C
1987
10.1 C
+2.72 C
1988
8.1 C
+0.67 C
1989
6.2 C
-1.25 C
1990
7.8 C
+0.36 C
1991
7.0 C
-0.42 C
1992
6.6 C
-0.79 C
1993
5.4 C
-2.07 C
1995
6.5 C
-0.88 C
1998
8.2 C
+0.79 C
1999
7.6 C
+0.22 C
2000
6.8 C
-0.61 C
2001
7.2 C
-0.25 C
2002
7.4 C
-0.02 C
2003
6.9 C
-0.56 C
2004
7.2 C
-0.25 C
2006
8.1 C
+0.68 C
2007
7.1 C
-0.30 C
2009
5.9 C
-1.56 C
2012
9.3 C
+1.90 C
2018
5.5 C
-1.92 C
2019
5.3 C
-2.10 C
2020
6.8 C
-0.63 C
2021
7.6 C
+0.14 C
2024
8.3 C
+0.91 C
The fitted trend in annual mean temperature here over 1897 to 2024 is -0.02 C (-0.07 to 0.04) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.03 F (-0.12 to 0.07) per decade. The slope is a straight line fitted to 94 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Northwood
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.02 C (-0.07 to 0.04) per decade
-0.03 F (-0.12 to 0.07) per decade
1897 to 2024
94
Not clearly different from zero
Mean daily maximum
-0.05 C (-0.12 to 0.01) per decade
-0.10 F (-0.21 to 0.02) per decade
1897 to 2024
94
Not clearly different from zero
Mean daily minimum
0.02 C (-0.03 to 0.07) per decade
0.04 F (-0.05 to 0.13) per decade
1897 to 2024
94
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
1896 to 2026
Yearly extremes at Northwood: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.7 C (107.1 F)
1936
34.4 C (93.9 F)
131
Coldest night (TNn)
-38.3 C (-36.9 F)
1912
-29.4 C (-20.9 F)
131
Wettest day (Rx1day)
168.9 mm (6.6 in)
1990
63.5 mm (2.5 in)
131
Wettest five days (Rx5day)
239.3 mm (9.4 in)
2021
100.4 mm (4.0 in)
131
Longest dry spell (CDD)
60 days
1962
24 days
131
Hottest day (TXx)
The hottest day of the year at Northwood, 1896 to 2026. The record is 41.7 C (107.1 F) in 1936, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Northwood by year
Year
Hottest day (TXx)
1896
35.6 C (96.1 F)
1897
35.6 C (96.1 F)
1898
34.4 C (93.9 F)
1899
35.6 C (96.1 F)
1900
32.8 C (91.0 F)
1901
40.6 C (105.1 F)
1902
31.7 C (89.1 F)
1903
30.6 C (87.1 F)
1904
32.8 C (91.0 F)
1905
35.6 C (96.1 F)
1906
32.8 C (91.0 F)
1907
32.8 C (91.0 F)
1908
32.8 C (91.0 F)
1909
33.9 C (93.0 F)
1910
35.0 C (95.0 F)
1911
33.3 C (91.9 F)
1912
33.3 C (91.9 F)
1913
36.1 C (97.0 F)
1914
34.4 C (93.9 F)
1915
31.7 C (89.1 F)
1916
35.6 C (96.1 F)
1917
34.4 C (93.9 F)
1918
31.7 C (89.1 F)
1919
33.9 C (93.0 F)
1920
34.4 C (93.9 F)
1921
36.1 C (97.0 F)
1922
36.7 C (98.1 F)
1923
37.2 C (99.0 F)
1924
31.7 C (89.1 F)
1925
35.6 C (96.1 F)
1926
37.8 C (100.0 F)
1927
35.0 C (95.0 F)
1928
34.4 C (93.9 F)
1929
33.9 C (93.0 F)
1930
39.4 C (102.9 F)
1931
37.8 C (100.0 F)
1932
35.0 C (95.0 F)
1933
37.8 C (100.0 F)
1934
40.6 C (105.1 F)
1935
35.0 C (95.0 F)
1936
41.7 C (107.1 F)
1937
37.8 C (100.0 F)
1938
34.4 C (93.9 F)
1939
36.1 C (97.0 F)
1940
38.9 C (102.0 F)
1941
35.6 C (96.1 F)
1942
33.3 C (91.9 F)
1943
33.9 C (93.0 F)
1944
33.9 C (93.0 F)
1945
33.3 C (91.9 F)
1946
33.3 C (91.9 F)
1947
36.1 C (97.0 F)
1948
36.7 C (98.1 F)
1949
35.0 C (95.0 F)
1950
32.8 C (91.0 F)
1951
28.9 C (84.0 F)
1952
33.9 C (93.0 F)
1953
37.8 C (100.0 F)
1954
35.6 C (96.1 F)
1955
37.8 C (100.0 F)
1956
36.1 C (97.0 F)
1957
35.6 C (96.1 F)
1958
34.4 C (93.9 F)
1959
36.1 C (97.0 F)
1960
34.4 C (93.9 F)
1961
35.0 C (95.0 F)
1962
32.8 C (91.0 F)
1963
36.7 C (98.1 F)
1964
36.7 C (98.1 F)
1965
36.1 C (97.0 F)
1966
35.0 C (95.0 F)
1967
32.8 C (91.0 F)
1968
35.0 C (95.0 F)
1969
34.4 C (93.9 F)
1970
37.2 C (99.0 F)
1971
35.0 C (95.0 F)
1972
35.0 C (95.0 F)
1973
34.4 C (93.9 F)
1974
37.8 C (100.0 F)
1975
34.4 C (93.9 F)
1976
36.7 C (98.1 F)
1977
36.7 C (98.1 F)
1978
36.1 C (97.0 F)
1979
33.3 C (91.9 F)
1980
37.2 C (99.0 F)
1981
33.9 C (93.0 F)
1982
36.1 C (97.0 F)
1983
36.7 C (98.1 F)
1984
36.1 C (97.0 F)
1985
38.9 C (102.0 F)
1986
35.0 C (95.0 F)
1987
38.3 C (100.9 F)
1988
38.9 C (102.0 F)
1989
36.1 C (97.0 F)
1990
37.8 C (100.0 F)
1991
35.6 C (96.1 F)
1992
32.8 C (91.0 F)
1993
31.1 C (88.0 F)
1994
32.8 C (91.0 F)
1995
38.3 C (100.9 F)
1996
33.9 C (93.0 F)
1997
31.7 C (89.1 F)
1998
32.8 C (91.0 F)
1999
34.4 C (93.9 F)
2000
34.4 C (93.9 F)
2001
35.0 C (95.0 F)
2002
34.4 C (93.9 F)
2003
32.8 C (91.0 F)
2004
32.2 C (90.0 F)
2005
32.2 C (90.0 F)
2006
34.4 C (93.9 F)
2007
33.9 C (93.0 F)
2008
31.1 C (88.0 F)
2009
32.8 C (91.0 F)
2010
32.8 C (91.0 F)
2011
35.6 C (96.1 F)
2012
35.0 C (95.0 F)
2013
37.8 C (100.0 F)
2014
30.0 C (86.0 F)
2015
30.6 C (87.1 F)
2016
31.1 C (88.0 F)
2017
32.8 C (91.0 F)
2018
35.0 C (95.0 F)
2019
32.2 C (90.0 F)
2020
34.4 C (93.9 F)
2021
34.4 C (93.9 F)
2022
6.1 C (43.0 F)
2023
36.7 C (98.1 F)
2024
32.8 C (91.0 F)
2025
31.1 C (88.0 F)
2026
31.1 C (88.0 F)
Coldest night (TNn)
The coldest night of the year at Northwood, 1896 to 2026. The record is -38.3 C (-36.9 F) in 1912, marked on the chart; the median year is -29.4 C (-20.9 F).
Coldest night (TNn) at Northwood by year
Year
Coldest night (TNn)
1896
-22.2 C (-8.0 F)
1897
-33.9 C (-29.0 F)
1898
-28.9 C (-20.0 F)
1899
-36.7 C (-34.1 F)
1900
-30.6 C (-23.1 F)
1901
-31.7 C (-25.1 F)
1902
-27.8 C (-18.0 F)
1903
-29.4 C (-20.9 F)
1904
-33.3 C (-27.9 F)
1905
-28.3 C (-18.9 F)
1906
-26.1 C (-15.0 F)
1907
-30.0 C (-22.0 F)
1908
-24.4 C (-11.9 F)
1909
-31.7 C (-25.1 F)
1910
-31.1 C (-24.0 F)
1911
-32.8 C (-27.0 F)
1912
-38.3 C (-36.9 F)
1913
-28.3 C (-18.9 F)
1914
-30.0 C (-22.0 F)
1915
-33.3 C (-27.9 F)
1916
-33.3 C (-27.9 F)
1917
-33.3 C (-27.9 F)
1918
-34.4 C (-29.9 F)
1919
-31.7 C (-25.1 F)
1920
-28.3 C (-18.9 F)
1921
-26.1 C (-15.0 F)
1922
-29.4 C (-20.9 F)
1923
-29.4 C (-20.9 F)
1924
-34.4 C (-29.9 F)
1925
-26.1 C (-15.0 F)
1926
-27.2 C (-17.0 F)
1927
-27.8 C (-18.0 F)
1928
-21.1 C (-6.0 F)
1929
-32.2 C (-26.0 F)
1930
-32.8 C (-27.0 F)
1931
-22.8 C (-9.0 F)
1932
-29.4 C (-20.9 F)
1933
-33.3 C (-27.9 F)
1934
-27.2 C (-17.0 F)
1935
-34.4 C (-29.9 F)
1936
-35.0 C (-31.0 F)
1937
-31.1 C (-24.0 F)
1938
-26.7 C (-16.1 F)
1939
-30.6 C (-23.1 F)
1940
-30.6 C (-23.1 F)
1941
-26.7 C (-16.1 F)
1942
-31.7 C (-25.1 F)
1943
-32.2 C (-26.0 F)
1944
-26.1 C (-15.0 F)
1945
-26.7 C (-16.1 F)
1946
-28.9 C (-20.0 F)
1947
-26.7 C (-16.1 F)
1948
-29.4 C (-20.9 F)
1949
-27.2 C (-17.0 F)
1950
-31.7 C (-25.1 F)
1951
-32.2 C (-26.0 F)
1952
-30.0 C (-22.0 F)
1953
-27.2 C (-17.0 F)
1954
-31.1 C (-24.0 F)
1955
-29.4 C (-20.9 F)
1956
-27.8 C (-18.0 F)
1957
-25.6 C (-14.1 F)
1958
-28.9 C (-20.0 F)
1959
-28.9 C (-20.0 F)
1960
-28.3 C (-18.9 F)
1961
-28.9 C (-20.0 F)
1962
-32.8 C (-27.0 F)
1963
-33.9 C (-29.0 F)
1964
-25.6 C (-14.1 F)
1965
-30.0 C (-22.0 F)
1966
-33.9 C (-29.0 F)
1967
-35.6 C (-32.1 F)
1968
-28.3 C (-18.9 F)
1969
-27.8 C (-18.0 F)
1970
-34.4 C (-29.9 F)
1971
-31.1 C (-24.0 F)
1972
-32.8 C (-27.0 F)
1973
-29.4 C (-20.9 F)
1974
-31.7 C (-25.1 F)
1975
-28.9 C (-20.0 F)
1976
-30.6 C (-23.1 F)
1977
-32.8 C (-27.0 F)
1978
-28.3 C (-18.9 F)
1979
-31.7 C (-25.1 F)
1980
-26.1 C (-15.0 F)
1981
-28.9 C (-20.0 F)
1982
-33.3 C (-27.9 F)
1983
-32.8 C (-27.0 F)
1984
-30.0 C (-22.0 F)
1985
-32.2 C (-26.0 F)
1986
-31.7 C (-25.1 F)
1987
-23.9 C (-11.0 F)
1988
-32.8 C (-27.0 F)
1989
-31.7 C (-25.1 F)
1990
-31.1 C (-24.0 F)
1991
-26.1 C (-15.0 F)
1992
-26.1 C (-15.0 F)
1993
-28.9 C (-20.0 F)
1994
-32.8 C (-27.0 F)
1995
-23.9 C (-11.0 F)
1996
-36.1 C (-33.0 F)
1997
-27.2 C (-17.0 F)
1998
-23.3 C (-9.9 F)
1999
-30.0 C (-22.0 F)
2000
-31.7 C (-25.1 F)
2001
-27.2 C (-17.0 F)
2002
-23.3 C (-9.9 F)
2003
-26.1 C (-15.0 F)
2004
-28.9 C (-20.0 F)
2005
-27.8 C (-18.0 F)
2006
-27.8 C (-18.0 F)
2007
-26.7 C (-16.1 F)
2008
-29.4 C (-20.9 F)
2009
-35.6 C (-32.1 F)
2010
-31.1 C (-24.0 F)
2011
-31.7 C (-25.1 F)
2012
-26.7 C (-16.1 F)
2013
-24.4 C (-11.9 F)
2014
-30.6 C (-23.1 F)
2015
-27.2 C (-17.0 F)
2016
-31.7 C (-25.1 F)
2017
-27.8 C (-18.0 F)
2018
-27.8 C (-18.0 F)
2019
-37.8 C (-36.0 F)
2020
-31.1 C (-24.0 F)
2021
-30.6 C (-23.1 F)
2022
-32.8 C (-27.0 F)
2023
-16.7 C (1.9 F)
2024
-26.7 C (-16.1 F)
2025
-28.9 C (-20.0 F)
2026
-29.4 C (-20.9 F)
Wettest day (Rx1day)
The wettest day of the year at Northwood, 1896 to 2026. The record is 168.9 mm (6.6 in) in 1990, marked on the chart; the median year is 63.5 mm (2.5 in).
Wettest day (Rx1day) at Northwood by year
Year
Wettest day (Rx1day)
1896
53.3 mm (2.1 in)
1897
61.0 mm (2.4 in)
1898
49.5 mm (1.9 in)
1899
73.7 mm (2.9 in)
1900
59.7 mm (2.4 in)
1901
62.0 mm (2.4 in)
1902
94.0 mm (3.7 in)
1903
45.2 mm (1.8 in)
1904
46.5 mm (1.8 in)
1905
34.3 mm (1.4 in)
1906
107.7 mm (4.2 in)
1907
88.9 mm (3.5 in)
1908
59.4 mm (2.3 in)
1909
63.5 mm (2.5 in)
1910
47.0 mm (1.9 in)
1911
105.7 mm (4.2 in)
1912
71.1 mm (2.8 in)
1913
45.7 mm (1.8 in)
1914
118.1 mm (4.6 in)
1915
58.4 mm (2.3 in)
1916
38.1 mm (1.5 in)
1917
50.8 mm (2.0 in)
1918
101.6 mm (4.0 in)
1919
49.5 mm (1.9 in)
1920
69.9 mm (2.8 in)
1921
76.2 mm (3.0 in)
1922
50.8 mm (2.0 in)
1923
77.0 mm (3.0 in)
1924
99.1 mm (3.9 in)
1925
92.7 mm (3.6 in)
1926
73.9 mm (2.9 in)
1927
165.9 mm (6.5 in)
1928
104.1 mm (4.1 in)
1929
59.7 mm (2.4 in)
1930
69.9 mm (2.8 in)
1931
52.1 mm (2.1 in)
1932
53.3 mm (2.1 in)
1933
63.5 mm (2.5 in)
1934
67.3 mm (2.6 in)
1935
68.1 mm (2.7 in)
1936
48.3 mm (1.9 in)
1937
78.7 mm (3.1 in)
1938
52.1 mm (2.1 in)
1939
57.2 mm (2.3 in)
1940
64.8 mm (2.6 in)
1941
73.7 mm (2.9 in)
1942
83.8 mm (3.3 in)
1943
86.4 mm (3.4 in)
1944
58.7 mm (2.3 in)
1945
104.1 mm (4.1 in)
1946
145.8 mm (5.7 in)
1947
49.8 mm (2.0 in)
1948
52.6 mm (2.1 in)
1949
41.4 mm (1.6 in)
1950
49.0 mm (1.9 in)
1951
51.6 mm (2.0 in)
1952
40.6 mm (1.6 in)
1953
63.2 mm (2.5 in)
1954
80.5 mm (3.2 in)
1955
83.3 mm (3.3 in)
1956
67.8 mm (2.7 in)
1957
76.2 mm (3.0 in)
1958
68.8 mm (2.7 in)
1959
101.6 mm (4.0 in)
1960
59.7 mm (2.4 in)
1961
58.4 mm (2.3 in)
1962
113.5 mm (4.5 in)
1963
79.8 mm (3.1 in)
1964
70.9 mm (2.8 in)
1965
66.0 mm (2.6 in)
1966
52.3 mm (2.1 in)
1967
50.8 mm (2.0 in)
1968
67.1 mm (2.6 in)
1969
94.0 mm (3.7 in)
1970
44.5 mm (1.8 in)
1971
57.2 mm (2.3 in)
1972
55.9 mm (2.2 in)
1973
41.4 mm (1.6 in)
1974
42.4 mm (1.7 in)
1975
80.0 mm (3.1 in)
1976
31.8 mm (1.3 in)
1977
43.9 mm (1.7 in)
1978
128.5 mm (5.1 in)
1979
65.5 mm (2.6 in)
1980
68.8 mm (2.7 in)
1981
75.7 mm (3.0 in)
1982
65.5 mm (2.6 in)
1983
87.6 mm (3.4 in)
1984
58.7 mm (2.3 in)
1985
49.5 mm (1.9 in)
1986
76.7 mm (3.0 in)
1987
40.6 mm (1.6 in)
1988
56.6 mm (2.2 in)
1989
53.8 mm (2.1 in)
1990
168.9 mm (6.6 in)
1991
68.6 mm (2.7 in)
1992
48.8 mm (1.9 in)
1993
77.5 mm (3.1 in)
1994
59.7 mm (2.4 in)
1995
59.7 mm (2.4 in)
1996
47.8 mm (1.9 in)
1997
42.2 mm (1.7 in)
1998
50.5 mm (2.0 in)
1999
75.2 mm (3.0 in)
2000
43.7 mm (1.7 in)
2001
46.7 mm (1.8 in)
2002
141.5 mm (5.6 in)
2003
47.2 mm (1.9 in)
2004
133.1 mm (5.2 in)
2005
62.5 mm (2.5 in)
2006
70.1 mm (2.8 in)
2007
52.6 mm (2.1 in)
2008
92.2 mm (3.6 in)
2009
39.4 mm (1.6 in)
2010
74.4 mm (2.9 in)
2011
119.6 mm (4.7 in)
2012
56.4 mm (2.2 in)
2013
101.1 mm (4.0 in)
2014
71.4 mm (2.8 in)
2015
60.2 mm (2.4 in)
2016
115.6 mm (4.6 in)
2017
51.8 mm (2.0 in)
2018
65.8 mm (2.6 in)
2019
73.9 mm (2.9 in)
2020
66.5 mm (2.6 in)
2021
125.2 mm (4.9 in)
2022
15.2 mm (0.6 in)
2023
62.2 mm (2.4 in)
2024
100.1 mm (3.9 in)
2025
124.5 mm (4.9 in)
2026
47.0 mm (1.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Northwood, 1896 to 2026. The record is 239.3 mm (9.4 in) in 2021, marked on the chart; the median year is 100.4 mm (4.0 in).
Wettest five days (Rx5day) at Northwood by year
Year
Wettest five days (Rx5day)
1896
75.4 mm (3.0 in)
1897
75.0 mm (3.0 in)
1898
76.2 mm (3.0 in)
1899
95.8 mm (3.8 in)
1900
84.0 mm (3.3 in)
1901
130.1 mm (5.1 in)
1902
96.8 mm (3.8 in)
1903
82.5 mm (3.2 in)
1904
80.2 mm (3.2 in)
1905
96.8 mm (3.8 in)
1906
148.4 mm (5.8 in)
1907
135.1 mm (5.3 in)
1908
117.9 mm (4.6 in)
1909
116.1 mm (4.6 in)
1910
66.6 mm (2.6 in)
1911
105.7 mm (4.2 in)
1912
102.8 mm (4.0 in)
1913
78.7 mm (3.1 in)
1914
172.8 mm (6.8 in)
1915
103.8 mm (4.1 in)
1916
76.2 mm (3.0 in)
1917
58.4 mm (2.3 in)
1918
101.6 mm (4.0 in)
1919
76.3 mm (3.0 in)
1920
97.1 mm (3.8 in)
1921
129.6 mm (5.1 in)
1922
99.0 mm (3.9 in)
1923
125.3 mm (4.9 in)
1924
105.9 mm (4.2 in)
1925
107.4 mm (4.2 in)
1926
125.5 mm (4.9 in)
1927
171.2 mm (6.7 in)
1928
119.4 mm (4.7 in)
1929
68.9 mm (2.7 in)
1930
118.5 mm (4.7 in)
1931
79.2 mm (3.1 in)
1932
64.8 mm (2.6 in)
1933
80.5 mm (3.2 in)
1934
104.1 mm (4.1 in)
1935
102.9 mm (4.1 in)
1936
76.2 mm (3.0 in)
1937
97.9 mm (3.9 in)
1938
128.3 mm (5.1 in)
1939
94.4 mm (3.7 in)
1940
146.9 mm (5.8 in)
1941
108.0 mm (4.3 in)
1942
135.9 mm (5.4 in)
1943
140.7 mm (5.5 in)
1944
100.4 mm (4.0 in)
1945
107.4 mm (4.2 in)
1946
187.7 mm (7.4 in)
1947
68.1 mm (2.7 in)
1948
62.8 mm (2.5 in)
1949
84.0 mm (3.3 in)
1950
101.3 mm (4.0 in)
1951
88.7 mm (3.5 in)
1952
56.2 mm (2.2 in)
1953
132.5 mm (5.2 in)
1954
202.4 mm (8.0 in)
1955
126.5 mm (5.0 in)
1956
70.6 mm (2.8 in)
1957
166.6 mm (6.6 in)
1958
69.8 mm (2.7 in)
1959
199.2 mm (7.8 in)
1960
107.7 mm (4.2 in)
1961
84.0 mm (3.3 in)
1962
140.9 mm (5.5 in)
1963
95.9 mm (3.8 in)
1964
109.5 mm (4.3 in)
1965
125.1 mm (4.9 in)
1966
53.1 mm (2.1 in)
1967
112.5 mm (4.4 in)
1968
96.6 mm (3.8 in)
1969
151.9 mm (6.0 in)
1970
81.5 mm (3.2 in)
1971
78.9 mm (3.1 in)
1972
86.6 mm (3.4 in)
1973
106.2 mm (4.2 in)
1974
61.3 mm (2.4 in)
1975
146.3 mm (5.8 in)
1976
47.3 mm (1.9 in)
1977
59.1 mm (2.3 in)
1978
168.6 mm (6.6 in)
1979
84.8 mm (3.3 in)
1980
142.5 mm (5.6 in)
1981
120.9 mm (4.8 in)
1982
100.0 mm (3.9 in)
1983
122.9 mm (4.8 in)
1984
88.5 mm (3.5 in)
1985
84.4 mm (3.3 in)
1986
80.0 mm (3.1 in)
1987
68.5 mm (2.7 in)
1988
112.7 mm (4.4 in)
1989
59.2 mm (2.3 in)
1990
216.6 mm (8.5 in)
1991
104.1 mm (4.1 in)
1992
69.1 mm (2.7 in)
1993
102.3 mm (4.0 in)
1994
80.5 mm (3.2 in)
1995
97.0 mm (3.8 in)
1996
62.2 mm (2.4 in)
1997
56.8 mm (2.2 in)
1998
93.7 mm (3.7 in)
1999
151.2 mm (6.0 in)
2000
76.7 mm (3.0 in)
2001
80.2 mm (3.2 in)
2002
142.5 mm (5.6 in)
2003
83.1 mm (3.3 in)
2004
180.5 mm (7.1 in)
2005
79.5 mm (3.1 in)
2006
81.3 mm (3.2 in)
2007
181.7 mm (7.2 in)
2008
181.3 mm (7.1 in)
2009
57.0 mm (2.2 in)
2010
87.8 mm (3.5 in)
2011
127.0 mm (5.0 in)
2012
70.1 mm (2.8 in)
2013
115.8 mm (4.6 in)
2014
128.8 mm (5.1 in)
2015
93.5 mm (3.7 in)
2016
137.7 mm (5.4 in)
2017
102.8 mm (4.0 in)
2018
113.0 mm (4.4 in)
2019
105.6 mm (4.2 in)
2020
92.6 mm (3.6 in)
2021
239.3 mm (9.4 in)
2022
16.0 mm (0.6 in)
2023
89.0 mm (3.5 in)
2024
143.8 mm (5.7 in)
2025
155.0 mm (6.1 in)
2026
113.0 mm (4.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Northwood, 1896 to 2026. The record is 60 days in 1962, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at Northwood by year
Year
Longest dry spell (CDD)
1896
29 days
1897
37 days
1898
27 days
1899
32 days
1900
31 days
1901
20 days
1902
20 days
1903
48 days
1904
23 days
1905
18 days
1906
21 days
1907
26 days
1908
28 days
1909
21 days
1910
34 days
1911
36 days
1912
22 days
1913
44 days
1914
46 days
1915
21 days
1916
24 days
1917
27 days
1918
28 days
1919
31 days
1920
16 days
1921
13 days
1922
22 days
1923
26 days
1924
24 days
1925
23 days
1926
16 days
1927
20 days
1928
18 days
1929
16 days
1930
19 days
1931
23 days
1932
22 days
1933
21 days
1934
58 days
1935
24 days
1936
24 days
1937
26 days
1938
23 days
1939
24 days
1940
17 days
1941
21 days
1942
38 days
1943
53 days
1944
34 days
1945
22 days
1946
26 days
1947
21 days
1948
22 days
1949
34 days
1950
30 days
1951
20 days
1952
59 days
1953
30 days
1954
25 days
1955
22 days
1956
19 days
1957
28 days
1958
31 days
1959
18 days
1960
24 days
1961
23 days
1962
60 days
1963
19 days
1964
38 days
1965
20 days
1966
25 days
1967
23 days
1968
35 days
1969
22 days
1970
21 days
1971
38 days
1972
20 days
1973
17 days
1974
19 days
1975
17 days
1976
38 days
1977
19 days
1978
19 days
1979
30 days
1980
38 days
1981
26 days
1982
17 days
1983
19 days
1984
26 days
1985
15 days
1986
23 days
1987
29 days
1988
31 days
1989
33 days
1990
25 days
1991
26 days
1992
20 days
1993
22 days
1994
38 days
1995
24 days
1996
36 days
1997
19 days
1998
39 days
1999
22 days
2000
17 days
2001
20 days
2002
36 days
2003
22 days
2004
25 days
2005
15 days
2006
18 days
2007
30 days
2008
21 days
2009
31 days
2010
28 days
2011
26 days
2012
24 days
2013
19 days
2014
18 days
2015
24 days
2016
20 days
2017
35 days
2018
17 days
2019
17 days
2020
28 days
2021
18 days
2022
14 days
2023
56 days
2024
38 days
2025
44 days
2026
29 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
94 years with a frost
Across 94 years with a frost, the median last spring frost at Northwood falls on 2 May and the median first autumn frost on 4 October, which leaves a median of 157 days between them.
In 1981 to 2024 the median growing season was 160 days. That is 4 days more than in 1897 to 1940.
Fitted over all years, the growing season changes by +0.8 days per decade at this station.
Frost dates and growing season at Northwood
Measure
Median, all years
Earliest period (1897 to 1940)
Recent period (1981 to 2024)
Recent against earliest
Fitted trend
Last spring frost
2 May
5 May
27 April
8 days earlier
-0.9 days per decade
First autumn frost
4 October
3 October
2 October
1 day earlier
-0.1 days per decade
Growing days
157 days
156 days
160 days
4 days more
+0.8 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
111 years, 1897 to 2024
A day with at least 62.5 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 160.3 mm (6.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Northwood: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
62.5 mm (2.5 in)
5 years
83.2 mm (3.3 in)
10 years
98.8 mm (3.9 in)
25 years
121.2 mm (4.8 in)
50 years
139.8 mm (5.5 in)
100 years
160.3 mm (6.3 in)
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 111 years of values from 1897 to 2024.
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: 168.9 mm (6.6 in) in 1990; 145.8 mm (5.7 in) in 1946; 141.5 mm (5.6 in) in 2002.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Northwood, at 1912. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1912 ran 0.3 C (0.5 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Northwood, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1912
-0.3
-0.5
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 Northwood standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Northwood 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.