Record envelope, standing records and threshold days for Portland Rfc City (USW00024274), Oregon, United States, with 103 years of record.
Key Facts for Portland Rfc City
Portland Rfc City (USW00024274) is a weather station in Oregon, United States at 45.53 latitude and -122.67 longitude, 9 m (30 ft) above sea level.
The station reports from 1871 to 1973, 103 years of record.
1,464 records set at Portland Rfc City still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Portland Rfc City tied a daily record high minimum temperature of 16.1 C (61.0 F) on 27 June 1973.
About the Station
Location: Oregon, United States, 45.53 latitude, -122.67 longitude.
Elevation: 9 m (30 ft).
Period of record: 1871 to 1973, 103 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 Portland Rfc City. 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 Portland Rfc City, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.3 C (64.9 F)
-18.9 C (-2.0 F)
n/a
n/a
Feb
23.9 C (75.0 F)
-13.9 C (7.0 F)
n/a
n/a
Mar
28.3 C (82.9 F)
-6.7 C (19.9 F)
n/a
n/a
Apr
33.9 C (93.0 F)
-2.2 C (28.0 F)
n/a
n/a
May
37.2 C (99.0 F)
0.0 C (32.0 F)
n/a
n/a
Jun
38.9 C (102.0 F)
3.9 C (39.0 F)
n/a
n/a
Jul
41.7 C (107.1 F)
6.1 C (43.0 F)
n/a
n/a
Aug
40.6 C (105.1 F)
6.1 C (43.0 F)
n/a
n/a
Sep
38.9 C (102.0 F)
1.7 C (35.1 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-1.7 C (28.9 F)
n/a
n/a
Nov
22.8 C (73.0 F)
-11.7 C (10.9 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-16.1 C (3.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Portland Rfc City still stand. 1896 holds the most, with 35.
Standing records at Portland Rfc City by the year they were set
Year set
Standing records
1874
8
1875
26
1876
12
1877
12
1878
13
1879
15
1880
31
1881
22
1882
24
1883
16
1884
22
1885
16
1886
10
1887
27
1888
25
1889
17
1890
25
1891
18
1892
7
1893
21
1894
25
1895
24
1896
35
1897
18
1898
14
1899
23
1900
18
1901
16
1902
26
1903
6
1904
19
1905
12
1906
25
1907
8
1908
13
1909
26
1910
11
1911
17
1912
11
1913
9
1914
9
1915
10
1916
12
1917
21
1918
12
1919
23
1920
8
1921
6
1922
11
1923
10
1924
21
1925
11
1926
22
1927
13
1928
13
1929
5
1930
6
1931
11
1932
9
1933
13
1934
14
1935
29
1936
21
1937
8
1938
8
1939
13
1940
14
1941
15
1942
9
1943
10
1944
12
1945
8
1946
4
1947
15
1948
12
1949
12
1950
19
1951
13
1952
14
1953
6
1954
5
1955
21
1956
7
1957
9
1958
23
1959
7
1960
12
1961
20
1962
5
1963
12
1964
10
1965
11
1966
8
1967
12
1968
22
1969
5
1970
10
1971
11
1972
26
1973
3
All-Time Record Progression
8 new records
8 all-time records were set at Portland Rfc City between 13 July 1906 and 21 January 1943. Each dot is a new record.
When Portland Rfc City set new all-time records
Date
Kind
Detail
1906-07-13
Record high minimum temperature
Record high minimum temperature 22.2 C (72.0 F)
1926-07-10
Record high maximum temperature
Record high maximum temperature 40.0 C (104.0 F)
1928-07-25
Record high minimum temperature
Record high minimum temperature 22.8 C (73.0 F)
1935-07-13
Record high maximum temperature
Record high maximum temperature 40.6 C (105.1 F)
1935-07-14
Record high minimum temperature
Record high minimum temperature 23.3 C (73.9 F)
1941-07-17
Record high minimum temperature
Record high minimum temperature 25.0 C (77.0 F)
1942-07-02
Record high maximum temperature
Record high maximum temperature 41.7 C (107.1 F)
1943-01-21
Record daily snowfall
Record daily snowfall 39.4 cm (15.5 in)
Wettest Day of Each Month
Dec: 169.7 mm (6.7 in)
The wettest day on record for each calendar month at Portland Rfc City. The most was 169.7 mm (6.7 in) on 13 December 1882.
Record daily precipitation for each month at Portland Rfc City
Month
Record daily precipitation (mm)
Date
Jan
141.0 mm (5.6 in)
6 January 1883
Feb
96.8 mm (3.8 in)
2 February 1890
Mar
60.7 mm (2.4 in)
25 March 1916
Apr
46.5 mm (1.8 in)
12 April 1937
May
41.9 mm (1.6 in)
15 May 1908
Jun
51.6 mm (2.0 in)
7 June 1927
Jul
27.9 mm (1.1 in)
11 July 1879
Aug
32.8 mm (1.3 in)
25 August 1956
Sep
61.2 mm (2.4 in)
17 September 1969
Oct
74.4 mm (2.9 in)
10 October 1882
Nov
91.4 mm (3.6 in)
26 November 1883
Dec
169.7 mm (6.7 in)
13 December 1882
Period of Record Coverage
1874 to 1973
Complete yearUnder 90 percent of days
100 years of record at Portland Rfc City, 1874 to 1973. 2 years have data for under 90 percent of days and are left out of rankings: 1874, 1973.
Cooler than the station meanWarmer than the station mean
One stripe for each of 97 complete years at Portland Rfc City, 1875 to 1972. Blue stripes are years cooler than the station's own mean of 12.1 C (53.8 F); red stripes are warmer. The coolest year was 1893, at 10.1 C (50.1 F), and the warmest was 1958, at 14.1 C (57.5 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Portland Rfc City as warming stripes, 1875 to 1972
Year
Annual mean temperature
Difference from the station mean
1875
11.8 C
-0.37 C
1876
11.7 C
-0.47 C
1877
11.9 C
-0.27 C
1878
11.6 C
-0.51 C
1879
11.3 C
-0.81 C
1880
10.5 C
-1.64 C
1881
11.6 C
-0.51 C
1882
11.5 C
-0.62 C
1883
11.7 C
-0.48 C
1884
11.4 C
-0.72 C
1885
13.1 C
+0.98 C
1886
12.1 C
-0.07 C
1887
11.3 C
-0.84 C
1888
12.1 C
+0.00 C
1889
12.6 C
+0.50 C
1890
11.3 C
-0.85 C
1891
12.1 C
-0.09 C
1892
11.6 C
-0.52 C
1893
10.1 C
-2.09 C
1894
11.1 C
-1.08 C
1895
11.1 C
-1.01 C
1896
11.4 C
-0.72 C
1897
11.7 C
-0.44 C
1898
11.4 C
-0.71 C
1899
11.0 C
-1.11 C
1900
12.0 C
-0.16 C
1901
11.4 C
-0.71 C
1902
11.5 C
-0.68 C
1903
11.6 C
-0.51 C
1904
12.4 C
+0.24 C
1905
11.9 C
-0.29 C
1906
12.5 C
+0.31 C
1907
12.0 C
-0.14 C
1908
11.6 C
-0.53 C
1909
11.0 C
-1.13 C
1910
11.9 C
-0.29 C
1911
11.3 C
-0.88 C
1912
11.9 C
-0.23 C
1913
11.6 C
-0.56 C
1914
12.5 C
+0.35 C
1915
12.6 C
+0.50 C
1916
10.9 C
-1.29 C
1917
12.2 C
+0.09 C
1919
11.5 C
-0.63 C
1920
11.7 C
-0.49 C
1921
12.1 C
-0.05 C
1922
11.3 C
-0.89 C
1923
12.5 C
+0.35 C
1924
12.0 C
-0.10 C
1925
13.0 C
+0.81 C
1926
13.8 C
+1.65 C
1927
12.1 C
-0.04 C
1928
12.3 C
+0.14 C
1929
11.8 C
-0.36 C
1930
11.8 C
-0.37 C
1931
12.9 C
+0.74 C
1932
12.3 C
+0.17 C
1933
11.9 C
-0.26 C
1934
14.1 C
+1.92 C
1935
12.1 C
-0.02 C
1936
12.5 C
+0.37 C
1937
12.2 C
+0.05 C
1938
12.8 C
+0.67 C
1939
13.2 C
+1.08 C
1940
13.6 C
+1.50 C
1941
13.7 C
+1.52 C
1942
12.7 C
+0.52 C
1943
12.4 C
+0.25 C
1944
12.6 C
+0.50 C
1945
12.7 C
+0.54 C
1946
12.4 C
+0.29 C
1947
13.2 C
+1.08 C
1948
11.8 C
-0.37 C
1949
12.2 C
+0.02 C
1950
11.9 C
-0.26 C
1951
12.5 C
+0.31 C
1952
12.6 C
+0.42 C
1953
12.9 C
+0.75 C
1954
11.9 C
-0.27 C
1955
11.1 C
-1.03 C
1956
12.1 C
-0.06 C
1957
12.4 C
+0.22 C
1958
14.1 C
+2.00 C
1959
12.5 C
+0.32 C
1960
12.2 C
+0.05 C
1961
13.1 C
+0.93 C
1962
12.3 C
+0.20 C
1963
12.7 C
+0.54 C
1964
12.0 C
-0.16 C
1965
13.0 C
+0.86 C
1966
13.1 C
+0.99 C
1967
13.6 C
+1.47 C
1968
12.8 C
+0.68 C
1969
12.5 C
+0.38 C
1970
12.7 C
+0.59 C
1971
12.2 C
+0.08 C
1972
12.6 C
+0.41 C
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1875 to 1972. In Fahrenheit: 0.3 F (0.2 to 0.3) per decade. The slope is a straight line fitted to 97 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Portland Rfc City
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.3) per decade
1875 to 1972
97
Rise
Mean daily maximum
0.1 C (0.1 to 0.2) per decade
0.2 F (0.1 to 0.3) per decade
1875 to 1972
97
Rise
Mean daily minimum
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.4) per decade
1875 to 1972
97
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
1871 to 1973
Yearly extremes at Portland Rfc City: 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)
1942
36.1 C (97.0 F)
100
Coldest night (TNn)
-18.9 C (-2.0 F)
1888
-7.2 C (19.0 F)
100
Wettest day (Rx1day)
169.7 mm (6.7 in)
1882
50.3 mm (2.0 in)
103
Wettest five days (Rx5day)
314.0 mm (12.4 in)
1882
112.0 mm (4.4 in)
103
Longest dry spell (CDD)
75 days
1967
38 days
103
Hottest day (TXx)
The hottest day of the year at Portland Rfc City, 1871 to 1973. The record is 41.7 C (107.1 F) in 1942, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Portland Rfc City by year
Year
Hottest day (TXx)
1871
n/a
1872
n/a
1873
n/a
1874
31.1 C (88.0 F)
1875
35.6 C (96.1 F)
1876
37.2 C (99.0 F)
1877
32.8 C (91.0 F)
1878
36.1 C (97.0 F)
1879
33.3 C (91.9 F)
1880
33.3 C (91.9 F)
1881
32.2 C (90.0 F)
1882
35.0 C (95.0 F)
1883
34.4 C (93.9 F)
1884
34.4 C (93.9 F)
1885
37.2 C (99.0 F)
1886
35.0 C (95.0 F)
1887
37.2 C (99.0 F)
1888
36.1 C (97.0 F)
1889
35.6 C (96.1 F)
1890
35.6 C (96.1 F)
1891
38.9 C (102.0 F)
1892
34.4 C (93.9 F)
1893
34.4 C (93.9 F)
1894
34.4 C (93.9 F)
1895
36.1 C (97.0 F)
1896
33.9 C (93.0 F)
1897
35.0 C (95.0 F)
1898
36.1 C (97.0 F)
1899
33.9 C (93.0 F)
1900
32.2 C (90.0 F)
1901
34.4 C (93.9 F)
1902
36.1 C (97.0 F)
1903
36.1 C (97.0 F)
1904
37.8 C (100.0 F)
1905
37.2 C (99.0 F)
1906
38.3 C (100.9 F)
1907
38.9 C (102.0 F)
1908
34.4 C (93.9 F)
1909
33.9 C (93.0 F)
1910
36.1 C (97.0 F)
1911
37.2 C (99.0 F)
1912
35.6 C (96.1 F)
1913
36.7 C (98.1 F)
1914
34.4 C (93.9 F)
1915
37.8 C (100.0 F)
1916
35.6 C (96.1 F)
1917
33.3 C (91.9 F)
1918
34.4 C (93.9 F)
1919
37.8 C (100.0 F)
1920
36.7 C (98.1 F)
1921
32.2 C (90.0 F)
1922
35.0 C (95.0 F)
1923
35.0 C (95.0 F)
1924
37.2 C (99.0 F)
1925
38.3 C (100.9 F)
1926
40.0 C (104.0 F)
1927
38.3 C (100.9 F)
1928
37.2 C (99.0 F)
1929
35.0 C (95.0 F)
1930
36.1 C (97.0 F)
1931
38.3 C (100.9 F)
1932
35.0 C (95.0 F)
1933
38.9 C (102.0 F)
1934
35.0 C (95.0 F)
1935
40.6 C (105.1 F)
1936
36.1 C (97.0 F)
1937
36.1 C (97.0 F)
1938
38.3 C (100.9 F)
1939
37.8 C (100.0 F)
1940
37.2 C (99.0 F)
1941
39.4 C (102.9 F)
1942
41.7 C (107.1 F)
1943
33.3 C (91.9 F)
1944
38.9 C (102.0 F)
1945
36.7 C (98.1 F)
1946
39.4 C (102.9 F)
1947
33.9 C (93.0 F)
1948
34.4 C (93.9 F)
1949
35.0 C (95.0 F)
1950
36.1 C (97.0 F)
1951
36.1 C (97.0 F)
1952
38.3 C (100.9 F)
1953
35.6 C (96.1 F)
1954
30.0 C (86.0 F)
1955
36.1 C (97.0 F)
1956
41.1 C (106.0 F)
1957
34.4 C (93.9 F)
1958
40.0 C (104.0 F)
1959
36.7 C (98.1 F)
1960
37.2 C (99.0 F)
1961
40.6 C (105.1 F)
1962
33.9 C (93.0 F)
1963
34.4 C (93.9 F)
1964
33.9 C (93.0 F)
1965
39.4 C (102.9 F)
1966
35.0 C (95.0 F)
1967
40.6 C (105.1 F)
1968
36.7 C (98.1 F)
1969
35.6 C (96.1 F)
1970
38.9 C (102.0 F)
1971
37.2 C (99.0 F)
1972
38.9 C (102.0 F)
1973
34.4 C (93.9 F)
Coldest night (TNn)
The coldest night of the year at Portland Rfc City, 1871 to 1973. The record is -18.9 C (-2.0 F) in 1888, marked on the chart; the median year is -7.2 C (19.0 F).
Coldest night (TNn) at Portland Rfc City by year
Year
Coldest night (TNn)
1871
n/a
1872
n/a
1873
n/a
1874
-2.8 C (27.0 F)
1875
-16.1 C (3.0 F)
1876
-6.7 C (19.9 F)
1877
-3.9 C (25.0 F)
1878
-7.8 C (18.0 F)
1879
-16.1 C (3.0 F)
1880
-7.2 C (19.0 F)
1881
-4.4 C (24.1 F)
1882
-7.8 C (18.0 F)
1883
-13.9 C (7.0 F)
1884
-13.9 C (7.0 F)
1885
-8.3 C (17.1 F)
1886
-9.4 C (15.1 F)
1887
-12.8 C (9.0 F)
1888
-18.9 C (-2.0 F)
1889
-5.0 C (23.0 F)
1890
-12.2 C (10.0 F)
1891
-5.0 C (23.0 F)
1892
-6.7 C (19.9 F)
1893
-13.3 C (8.1 F)
1894
-7.8 C (18.0 F)
1895
-3.9 C (25.0 F)
1896
-11.7 C (10.9 F)
1897
-5.6 C (21.9 F)
1898
-6.1 C (21.0 F)
1899
-12.8 C (9.0 F)
1900
-7.2 C (19.0 F)
1901
-3.3 C (26.1 F)
1902
-10.6 C (12.9 F)
1903
-4.4 C (24.1 F)
1904
-2.2 C (28.0 F)
1905
-8.3 C (17.1 F)
1906
-5.6 C (21.9 F)
1907
-10.6 C (12.9 F)
1908
-5.0 C (23.0 F)
1909
-14.4 C (6.1 F)
1910
-6.1 C (21.0 F)
1911
-5.0 C (23.0 F)
1912
-6.7 C (19.9 F)
1913
-5.6 C (21.9 F)
1914
-5.6 C (21.9 F)
1915
-3.3 C (26.1 F)
1916
-10.6 C (12.9 F)
1917
-5.6 C (21.9 F)
1918
-5.6 C (21.9 F)
1919
-16.1 C (3.0 F)
1920
-5.0 C (23.0 F)
1921
-6.1 C (21.0 F)
1922
-8.9 C (16.0 F)
1923
-10.0 C (14.0 F)
1924
-11.7 C (10.9 F)
1925
-1.7 C (28.9 F)
1926
-7.2 C (19.0 F)
1927
-11.1 C (12.0 F)
1928
-9.4 C (15.1 F)
1929
-9.4 C (15.1 F)
1930
-10.6 C (12.9 F)
1931
-3.9 C (25.0 F)
1932
-8.9 C (16.0 F)
1933
-11.1 C (12.0 F)
1934
0.6 C (33.1 F)
1935
-11.1 C (12.0 F)
1936
-10.0 C (14.0 F)
1937
-10.0 C (14.0 F)
1938
-3.3 C (26.1 F)
1939
-4.4 C (24.1 F)
1940
-2.8 C (27.0 F)
1941
-5.0 C (23.0 F)
1942
-6.1 C (21.0 F)
1943
-11.7 C (10.9 F)
1944
-1.1 C (30.0 F)
1945
-3.3 C (26.1 F)
1946
-2.8 C (27.0 F)
1947
-5.6 C (21.9 F)
1948
-3.9 C (25.0 F)
1949
-8.3 C (17.1 F)
1950
-13.9 C (7.0 F)
1951
-7.8 C (18.0 F)
1952
-6.1 C (21.0 F)
1953
-0.6 C (30.9 F)
1954
-8.3 C (17.1 F)
1955
-9.4 C (15.1 F)
1956
-8.3 C (17.1 F)
1957
-11.7 C (10.9 F)
1958
-0.6 C (30.9 F)
1959
-7.8 C (18.0 F)
1960
-5.0 C (23.0 F)
1961
-5.6 C (21.9 F)
1962
-8.9 C (16.0 F)
1963
-10.6 C (12.9 F)
1964
-12.2 C (10.0 F)
1965
-4.4 C (24.1 F)
1966
-1.7 C (28.9 F)
1967
-3.3 C (26.1 F)
1968
-14.4 C (6.1 F)
1969
-8.9 C (16.0 F)
1970
-2.8 C (27.0 F)
1971
-3.3 C (26.1 F)
1972
-10.6 C (12.9 F)
1973
-6.1 C (21.0 F)
Wettest day (Rx1day)
The wettest day of the year at Portland Rfc City, 1871 to 1973. The record is 169.7 mm (6.7 in) in 1882, marked on the chart; the median year is 50.3 mm (2.0 in).
Wettest day (Rx1day) at Portland Rfc City by year
Year
Wettest day (Rx1day)
1871
37.8 mm (1.5 in)
1872
61.0 mm (2.4 in)
1873
55.9 mm (2.2 in)
1874
68.3 mm (2.7 in)
1875
77.5 mm (3.1 in)
1876
55.4 mm (2.2 in)
1877
57.2 mm (2.3 in)
1878
42.2 mm (1.7 in)
1879
69.6 mm (2.7 in)
1880
84.8 mm (3.3 in)
1881
57.2 mm (2.3 in)
1882
169.7 mm (6.7 in)
1883
141.0 mm (5.6 in)
1884
43.2 mm (1.7 in)
1885
78.7 mm (3.1 in)
1886
37.1 mm (1.5 in)
1887
67.3 mm (2.6 in)
1888
34.5 mm (1.4 in)
1889
43.9 mm (1.7 in)
1890
96.8 mm (3.8 in)
1891
35.8 mm (1.4 in)
1892
36.1 mm (1.4 in)
1893
47.0 mm (1.9 in)
1894
40.6 mm (1.6 in)
1895
51.1 mm (2.0 in)
1896
67.6 mm (2.7 in)
1897
63.8 mm (2.5 in)
1898
37.1 mm (1.5 in)
1899
45.7 mm (1.8 in)
1900
39.6 mm (1.6 in)
1901
59.9 mm (2.4 in)
1902
42.4 mm (1.7 in)
1903
88.4 mm (3.5 in)
1904
43.9 mm (1.7 in)
1905
34.0 mm (1.3 in)
1906
55.9 mm (2.2 in)
1907
72.1 mm (2.8 in)
1908
43.4 mm (1.7 in)
1909
33.5 mm (1.3 in)
1910
38.6 mm (1.5 in)
1911
114.3 mm (4.5 in)
1912
56.1 mm (2.2 in)
1913
30.5 mm (1.2 in)
1914
35.8 mm (1.4 in)
1915
54.4 mm (2.1 in)
1916
60.7 mm (2.4 in)
1917
45.7 mm (1.8 in)
1918
31.2 mm (1.2 in)
1919
45.7 mm (1.8 in)
1920
76.2 mm (3.0 in)
1921
86.6 mm (3.4 in)
1922
45.5 mm (1.8 in)
1923
61.7 mm (2.4 in)
1924
36.3 mm (1.4 in)
1925
74.9 mm (2.9 in)
1926
49.5 mm (1.9 in)
1927
54.1 mm (2.1 in)
1928
51.8 mm (2.0 in)
1929
53.8 mm (2.1 in)
1930
31.5 mm (1.2 in)
1931
52.3 mm (2.1 in)
1932
42.2 mm (1.7 in)
1933
57.7 mm (2.3 in)
1934
46.5 mm (1.8 in)
1935
30.2 mm (1.2 in)
1936
55.9 mm (2.2 in)
1937
101.3 mm (4.0 in)
1938
46.7 mm (1.8 in)
1939
34.0 mm (1.3 in)
1940
53.6 mm (2.1 in)
1941
43.7 mm (1.7 in)
1942
57.2 mm (2.3 in)
1943
52.8 mm (2.1 in)
1944
32.8 mm (1.3 in)
1945
64.5 mm (2.5 in)
1946
50.8 mm (2.0 in)
1947
35.6 mm (1.4 in)
1948
66.8 mm (2.6 in)
1949
59.7 mm (2.4 in)
1950
74.9 mm (2.9 in)
1951
37.1 mm (1.5 in)
1952
26.4 mm (1.0 in)
1953
47.8 mm (1.9 in)
1954
47.2 mm (1.9 in)
1955
58.2 mm (2.3 in)
1956
52.8 mm (2.1 in)
1957
43.2 mm (1.7 in)
1958
40.1 mm (1.6 in)
1959
39.9 mm (1.6 in)
1960
67.1 mm (2.6 in)
1961
46.7 mm (1.8 in)
1962
43.7 mm (1.7 in)
1963
43.7 mm (1.7 in)
1964
50.3 mm (2.0 in)
1965
61.5 mm (2.4 in)
1966
57.2 mm (2.3 in)
1967
42.9 mm (1.7 in)
1968
46.7 mm (1.8 in)
1969
61.2 mm (2.4 in)
1970
51.6 mm (2.0 in)
1971
41.9 mm (1.6 in)
1972
46.5 mm (1.8 in)
1973
28.4 mm (1.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Portland Rfc City, 1871 to 1973. The record is 314.0 mm (12.4 in) in 1882, marked on the chart; the median year is 112.0 mm (4.4 in).
Wettest five days (Rx5day) at Portland Rfc City by year
Year
Wettest five days (Rx5day)
1871
82.2 mm (3.2 in)
1872
195.6 mm (7.7 in)
1873
118.0 mm (4.6 in)
1874
112.0 mm (4.4 in)
1875
170.0 mm (6.7 in)
1876
138.2 mm (5.4 in)
1877
124.5 mm (4.9 in)
1878
106.9 mm (4.2 in)
1879
152.4 mm (6.0 in)
1880
167.4 mm (6.6 in)
1881
147.5 mm (5.8 in)
1882
314.0 mm (12.4 in)
1883
198.2 mm (7.8 in)
1884
107.0 mm (4.2 in)
1885
122.1 mm (4.8 in)
1886
104.1 mm (4.1 in)
1887
122.4 mm (4.8 in)
1888
107.1 mm (4.2 in)
1889
87.1 mm (3.4 in)
1890
246.8 mm (9.7 in)
1891
88.0 mm (3.5 in)
1892
100.6 mm (4.0 in)
1893
93.0 mm (3.7 in)
1894
102.6 mm (4.0 in)
1895
122.6 mm (4.8 in)
1896
133.6 mm (5.3 in)
1897
136.0 mm (5.4 in)
1898
83.7 mm (3.3 in)
1899
113.8 mm (4.5 in)
1900
65.0 mm (2.6 in)
1901
122.0 mm (4.8 in)
1902
90.1 mm (3.5 in)
1903
126.0 mm (5.0 in)
1904
91.4 mm (3.6 in)
1905
87.1 mm (3.4 in)
1906
102.9 mm (4.1 in)
1907
106.9 mm (4.2 in)
1908
87.1 mm (3.4 in)
1909
118.1 mm (4.6 in)
1910
101.4 mm (4.0 in)
1911
160.3 mm (6.3 in)
1912
113.3 mm (4.5 in)
1913
97.3 mm (3.8 in)
1914
106.9 mm (4.2 in)
1915
104.9 mm (4.1 in)
1916
105.2 mm (4.1 in)
1917
137.2 mm (5.4 in)
1918
67.9 mm (2.7 in)
1919
135.2 mm (5.3 in)
1920
112.6 mm (4.4 in)
1921
184.9 mm (7.3 in)
1922
74.7 mm (2.9 in)
1923
97.3 mm (3.8 in)
1924
87.6 mm (3.4 in)
1925
91.6 mm (3.6 in)
1926
105.5 mm (4.2 in)
1927
89.2 mm (3.5 in)
1928
123.6 mm (4.9 in)
1929
119.6 mm (4.7 in)
1930
55.1 mm (2.2 in)
1931
105.4 mm (4.1 in)
1932
128.0 mm (5.0 in)
1933
182.6 mm (7.2 in)
1934
133.6 mm (5.3 in)
1935
93.3 mm (3.7 in)
1936
99.9 mm (3.9 in)
1937
237.1 mm (9.3 in)
1938
103.9 mm (4.1 in)
1939
73.9 mm (2.9 in)
1940
95.6 mm (3.8 in)
1941
130.5 mm (5.1 in)
1942
144.3 mm (5.7 in)
1943
146.5 mm (5.8 in)
1944
91.9 mm (3.6 in)
1945
113.6 mm (4.5 in)
1946
115.6 mm (4.6 in)
1947
133.9 mm (5.3 in)
1948
104.3 mm (4.1 in)
1949
128.2 mm (5.0 in)
1950
143.5 mm (5.6 in)
1951
104.4 mm (4.1 in)
1952
93.5 mm (3.7 in)
1953
107.7 mm (4.2 in)
1954
91.2 mm (3.6 in)
1955
117.9 mm (4.6 in)
1956
147.3 mm (5.8 in)
1957
108.5 mm (4.3 in)
1958
88.6 mm (3.5 in)
1959
107.0 mm (4.2 in)
1960
147.2 mm (5.8 in)
1961
104.3 mm (4.1 in)
1962
75.0 mm (3.0 in)
1963
116.1 mm (4.6 in)
1964
150.1 mm (5.9 in)
1965
150.9 mm (5.9 in)
1966
124.0 mm (4.9 in)
1967
97.6 mm (3.8 in)
1968
110.3 mm (4.3 in)
1969
114.4 mm (4.5 in)
1970
134.4 mm (5.3 in)
1971
114.2 mm (4.5 in)
1972
118.9 mm (4.7 in)
1973
61.5 mm (2.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Portland Rfc City, 1871 to 1973. The record is 75 days in 1967, marked on the chart; the median year is 38 days.
Longest dry spell (CDD) at Portland Rfc City by year
Year
Longest dry spell (CDD)
1871
3 days
1872
28 days
1873
40 days
1874
35 days
1875
59 days
1876
28 days
1877
21 days
1878
36 days
1879
35 days
1880
42 days
1881
19 days
1882
24 days
1883
58 days
1884
27 days
1885
56 days
1886
55 days
1887
56 days
1888
46 days
1889
47 days
1890
52 days
1891
23 days
1892
36 days
1893
61 days
1894
43 days
1895
55 days
1896
52 days
1897
53 days
1898
27 days
1899
24 days
1900
34 days
1901
53 days
1902
33 days
1903
23 days
1904
33 days
1905
33 days
1906
44 days
1907
34 days
1908
46 days
1909
28 days
1910
55 days
1911
38 days
1912
23 days
1913
34 days
1914
73 days
1915
41 days
1916
31 days
1917
68 days
1918
34 days
1919
38 days
1920
36 days
1921
46 days
1922
61 days
1923
44 days
1924
59 days
1925
60 days
1926
58 days
1927
38 days
1928
67 days
1929
39 days
1930
42 days
1931
58 days
1932
29 days
1933
38 days
1934
36 days
1935
24 days
1936
43 days
1937
25 days
1938
43 days
1939
49 days
1940
48 days
1941
38 days
1942
21 days
1943
28 days
1944
52 days
1945
37 days
1946
51 days
1947
27 days
1948
21 days
1949
34 days
1950
31 days
1951
53 days
1952
55 days
1953
30 days
1954
39 days
1955
48 days
1956
26 days
1957
48 days
1958
69 days
1959
38 days
1960
42 days
1961
40 days
1962
49 days
1963
26 days
1964
15 days
1965
25 days
1966
54 days
1967
75 days
1968
24 days
1969
39 days
1970
35 days
1971
41 days
1972
36 days
1973
17 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
88 years with a frost
Across 88 years with a frost, the median last spring frost at Portland Rfc City falls on 9 March and the median first autumn frost on 23 November, which leaves a median of 264 days between them.
In 1937 to 1972 the median growing season was 277 days. That is 40 days more than in 1875 to 1904.
Fitted over all years, the growing season changes by +5.5 days per decade at this station.
Frost dates and growing season at Portland Rfc City
Measure
Median, all years
Earliest period (1875 to 1904)
Recent period (1937 to 1972)
Recent against earliest
Fitted trend
Last spring frost
9 March
29 March
25 February
32 days earlier
-4.1 days per decade
First autumn frost
23 November
17 November
30 November
13 days later
+1.3 days per decade
Growing days
264 days
237 days
277 days
40 days more
+5.5 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
101 years, 1872 to 1972
A day with at least 49.5 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 135.2 mm (5.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Portland Rfc City: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
49.5 mm (1.9 in)
5 years
66.1 mm (2.6 in)
10 years
79.3 mm (3.1 in)
25 years
98.9 mm (3.9 in)
50 years
115.9 mm (4.6 in)
100 years
135.2 mm (5.3 in)
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 101 years of values from 1872 to 1972.
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: 169.7 mm (6.7 in) in 1882; 141.0 mm (5.6 in) in 1883; 114.3 mm (4.5 in) in 1911.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Portland Rfc City standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Portland Rfc City 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.