Record envelope, standing records and threshold days for Astor Exp STN (USC00350318), Oregon, United States, with 37 years of record.
Key Facts for Astor Exp STN
Astor Exp STN (USC00350318) is a weather station in Oregon, United States at 46.15 latitude and -123.82 longitude, 15 m (49 ft) above sea level.
The station reports from 1937 to 1973, 37 years of record.
1,464 records set at Astor Exp STN still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Astor Exp STN set a daily record precipitation of 19.6 mm (0.8 in) on 25 June 1973.
About the Station
Location: Oregon, United States, 46.15 latitude, -123.82 longitude.
Elevation: 15 m (49 ft).
Period of record: 1937 to 1973, 37 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 Astor Exp STN. 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 Astor Exp STN, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.1 C (70.0 F)
-12.8 C (9.0 F)
n/a
n/a
Feb
23.3 C (73.9 F)
-10.0 C (14.0 F)
n/a
n/a
Mar
26.1 C (79.0 F)
-7.2 C (19.0 F)
n/a
n/a
Apr
29.4 C (84.9 F)
-3.3 C (26.1 F)
n/a
n/a
May
32.2 C (90.0 F)
-3.9 C (25.0 F)
n/a
n/a
Jun
34.4 C (93.9 F)
0.0 C (32.0 F)
n/a
n/a
Jul
33.3 C (91.9 F)
2.8 C (37.0 F)
n/a
n/a
Aug
36.7 C (98.1 F)
2.8 C (37.0 F)
n/a
n/a
Sep
34.4 C (93.9 F)
-2.8 C (27.0 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-6.7 C (19.9 F)
n/a
n/a
Nov
25.0 C (77.0 F)
-12.2 C (10.0 F)
n/a
n/a
Dec
22.8 C (73.0 F)
-15.6 C (3.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Astor Exp STN still stand. 1955 holds the most, with 71.
Standing records at Astor Exp STN by the year they were set
Year set
Standing records
1937
29
1938
29
1939
48
1940
51
1941
44
1942
37
1943
37
1944
48
1945
50
1946
29
1947
48
1948
15
1949
52
1950
67
1951
40
1952
47
1953
55
1954
37
1955
71
1956
47
1957
36
1958
49
1959
29
1960
29
1961
35
1962
35
1963
30
1964
34
1965
56
1966
28
1967
28
1968
41
1969
26
1970
27
1971
30
1972
50
1973
20
All-Time Record Progression
1 new records
1 all-time records were set at Astor Exp STN between 8 December 1972 and 8 December 1972. Each dot is a new record.
When Astor Exp STN set new all-time records
Date
Kind
Detail
1972-12-08
Record low minimum temperature
Record low minimum temperature -15.6 C (3.9 F)
Wettest Day of Each Month
Jan: 129.3 mm (5.1 in)
The wettest day on record for each calendar month at Astor Exp STN. The most was 129.3 mm (5.1 in) on 25 January 1964.
Record daily precipitation for each month at Astor Exp STN
Month
Record daily precipitation (mm)
Date
Jan
129.3 mm (5.1 in)
25 January 1964
Feb
100.3 mm (3.9 in)
23 February 1950
Mar
78.5 mm (3.1 in)
4 March 1950
Apr
53.1 mm (2.1 in)
19 April 1965
May
51.6 mm (2.0 in)
24 May 1973
Jun
53.8 mm (2.1 in)
6 June 1958
Jul
41.1 mm (1.6 in)
26 July 1955
Aug
46.2 mm (1.8 in)
23 August 1968
Sep
53.1 mm (2.1 in)
30 September 1953
Oct
73.7 mm (2.9 in)
19 October 1958
Nov
98.8 mm (3.9 in)
8 November 1937
Dec
103.1 mm (4.1 in)
11 December 1955
Period of Record Coverage
1937 to 1973
Complete yearUnder 90 percent of days
37 years of record at Astor Exp STN, 1937 to 1973. 4 years have data for under 90 percent of days and are left out of rankings: 1937, 1939, 1948, 1973.
Cooler than the station meanWarmer than the station mean
One stripe for each of 33 complete years at Astor Exp STN, 1938 to 1972. Blue stripes are years cooler than the station's own mean of 10.4 C (50.8 F); red stripes are warmer. The coolest year was 1955, at 9.2 C (48.6 F), and the warmest was 1958, at 11.8 C (53.3 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Astor Exp STN as warming stripes, 1938 to 1972
Year
Annual mean temperature
Difference from the station mean
1938
10.7 C
+0.24 C
1940
11.5 C
+1.08 C
1941
11.4 C
+0.94 C
1942
10.6 C
+0.20 C
1943
10.1 C
-0.29 C
1944
10.3 C
-0.10 C
1945
10.2 C
-0.25 C
1946
10.1 C
-0.34 C
1947
11.0 C
+0.60 C
1949
10.1 C
-0.36 C
1950
9.9 C
-0.49 C
1951
10.0 C
-0.47 C
1952
10.0 C
-0.41 C
1953
11.1 C
+0.64 C
1954
10.3 C
-0.13 C
1955
9.2 C
-1.21 C
1956
10.2 C
-0.28 C
1957
10.5 C
+0.07 C
1958
11.8 C
+1.40 C
1959
10.7 C
+0.27 C
1960
10.4 C
-0.02 C
1961
10.9 C
+0.48 C
1962
10.3 C
-0.09 C
1963
10.8 C
+0.37 C
1964
9.7 C
-0.70 C
1965
10.0 C
-0.41 C
1966
10.7 C
+0.27 C
1967
10.9 C
+0.42 C
1968
10.8 C
+0.32 C
1969
10.3 C
-0.14 C
1970
10.3 C
-0.11 C
1971
9.5 C
-0.91 C
1972
9.8 C
-0.66 C
The fitted trend in annual mean temperature here over 1938 to 1972 is -0.1 C (-0.3 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.6 to 0.1) per decade. The slope is a straight line fitted to 33 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Astor Exp STN
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.6 to 0.1) per decade
1938 to 1972
33
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.4 to 0.1) per decade
-0.2 F (-0.6 to 0.2) per decade
1938 to 1972
33
Not clearly different from zero
Mean daily minimum
-0.14 C (-0.33 to 0.04) per decade
-0.3 F (-0.6 to 0.1) per decade
1938 to 1972
33
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
1937 to 1973
Yearly extremes at Astor Exp STN: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
36.7 C (98.1 F)
1940
32.2 C (90.0 F)
37
Coldest night (TNn)
-15.6 C (3.9 F)
1972
-7.2 C (19.0 F)
37
Wettest day (Rx1day)
129.3 mm (5.1 in)
1964
74.2 mm (2.9 in)
37
Wettest five days (Rx5day)
259.9 mm (10.2 in)
1971
179.4 mm (7.1 in)
37
Longest dry spell (CDD)
51 days
1951
23 days
37
Hottest day (TXx)
The hottest day of the year at Astor Exp STN, 1937 to 1973. The record is 36.7 C (98.1 F) in 1940, marked on the chart; the median year is 32.2 C (90.0 F).
Hottest day (TXx) at Astor Exp STN by year
Year
Hottest day (TXx)
1937
29.4 C (84.9 F)
1938
33.3 C (91.9 F)
1939
34.4 C (93.9 F)
1940
36.7 C (98.1 F)
1941
31.7 C (89.1 F)
1942
33.3 C (91.9 F)
1943
32.2 C (90.0 F)
1944
33.3 C (91.9 F)
1945
29.4 C (84.9 F)
1946
30.6 C (87.1 F)
1947
31.7 C (89.1 F)
1948
34.4 C (93.9 F)
1949
31.1 C (88.0 F)
1950
32.8 C (91.0 F)
1951
33.9 C (93.0 F)
1952
32.8 C (91.0 F)
1953
31.1 C (88.0 F)
1954
28.9 C (84.0 F)
1955
34.4 C (93.9 F)
1956
32.2 C (90.0 F)
1957
32.2 C (90.0 F)
1958
33.3 C (91.9 F)
1959
32.2 C (90.0 F)
1960
31.1 C (88.0 F)
1961
32.2 C (90.0 F)
1962
29.4 C (84.9 F)
1963
30.0 C (86.0 F)
1964
31.7 C (89.1 F)
1965
29.4 C (84.9 F)
1966
34.4 C (93.9 F)
1967
33.3 C (91.9 F)
1968
31.1 C (88.0 F)
1969
29.4 C (84.9 F)
1970
33.3 C (91.9 F)
1971
28.3 C (82.9 F)
1972
33.9 C (93.0 F)
1973
30.6 C (87.1 F)
Coldest night (TNn)
The coldest night of the year at Astor Exp STN, 1937 to 1973. The record is -15.6 C (3.9 F) in 1972, marked on the chart; the median year is -7.2 C (19.0 F).
Coldest night (TNn) at Astor Exp STN by year
Year
Coldest night (TNn)
1937
-2.2 C (28.0 F)
1938
-3.3 C (26.1 F)
1939
-5.0 C (23.0 F)
1940
-6.7 C (19.9 F)
1941
-5.0 C (23.0 F)
1942
-8.3 C (17.1 F)
1943
-11.7 C (10.9 F)
1944
-6.7 C (19.9 F)
1945
-5.0 C (23.0 F)
1946
-6.1 C (21.0 F)
1947
-7.2 C (19.0 F)
1948
-6.7 C (19.9 F)
1949
-10.0 C (14.0 F)
1950
-12.8 C (9.0 F)
1951
-10.0 C (14.0 F)
1952
-7.2 C (19.0 F)
1953
-5.0 C (23.0 F)
1954
-7.2 C (19.0 F)
1955
-12.2 C (10.0 F)
1956
-9.4 C (15.1 F)
1957
-10.6 C (12.9 F)
1958
-5.6 C (21.9 F)
1959
-10.0 C (14.0 F)
1960
-7.2 C (19.0 F)
1961
-6.1 C (21.0 F)
1962
-11.7 C (10.9 F)
1963
-10.6 C (12.9 F)
1964
-12.2 C (10.0 F)
1965
-5.0 C (23.0 F)
1966
-3.9 C (25.0 F)
1967
-5.6 C (21.9 F)
1968
-8.9 C (16.0 F)
1969
-10.6 C (12.9 F)
1970
-4.4 C (24.1 F)
1971
-6.7 C (19.9 F)
1972
-15.6 C (3.9 F)
1973
-8.9 C (16.0 F)
Wettest day (Rx1day)
The wettest day of the year at Astor Exp STN, 1937 to 1973. The record is 129.3 mm (5.1 in) in 1964, marked on the chart; the median year is 74.2 mm (2.9 in).
Wettest day (Rx1day) at Astor Exp STN by year
Year
Wettest day (Rx1day)
1937
98.8 mm (3.9 in)
1938
58.2 mm (2.3 in)
1939
76.7 mm (3.0 in)
1940
60.5 mm (2.4 in)
1941
58.4 mm (2.3 in)
1942
66.5 mm (2.6 in)
1943
79.8 mm (3.1 in)
1944
34.5 mm (1.4 in)
1945
74.2 mm (2.9 in)
1946
89.7 mm (3.5 in)
1947
52.3 mm (2.1 in)
1948
87.6 mm (3.4 in)
1949
90.9 mm (3.6 in)
1950
100.3 mm (3.9 in)
1951
68.6 mm (2.7 in)
1952
44.2 mm (1.7 in)
1953
89.9 mm (3.5 in)
1954
67.6 mm (2.7 in)
1955
103.1 mm (4.1 in)
1956
74.2 mm (2.9 in)
1957
51.6 mm (2.0 in)
1958
85.9 mm (3.4 in)
1959
67.6 mm (2.7 in)
1960
75.9 mm (3.0 in)
1961
75.2 mm (3.0 in)
1962
69.3 mm (2.7 in)
1963
73.7 mm (2.9 in)
1964
129.3 mm (5.1 in)
1965
99.1 mm (3.9 in)
1966
59.4 mm (2.3 in)
1967
62.5 mm (2.5 in)
1968
53.3 mm (2.1 in)
1969
65.8 mm (2.6 in)
1970
78.5 mm (3.1 in)
1971
88.9 mm (3.5 in)
1972
85.3 mm (3.4 in)
1973
51.6 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Astor Exp STN, 1937 to 1973. The record is 259.9 mm (10.2 in) in 1971, marked on the chart; the median year is 179.4 mm (7.1 in).
Wettest five days (Rx5day) at Astor Exp STN by year
Year
Wettest five days (Rx5day)
1937
170.0 mm (6.7 in)
1938
122.2 mm (4.8 in)
1939
209.0 mm (8.2 in)
1940
157.0 mm (6.2 in)
1941
180.6 mm (7.1 in)
1942
147.8 mm (5.8 in)
1943
172.8 mm (6.8 in)
1944
92.8 mm (3.7 in)
1945
153.3 mm (6.0 in)
1946
206.0 mm (8.1 in)
1947
140.5 mm (5.5 in)
1948
176.4 mm (6.9 in)
1949
151.6 mm (6.0 in)
1950
231.1 mm (9.1 in)
1951
232.2 mm (9.1 in)
1952
124.6 mm (4.9 in)
1953
194.0 mm (7.6 in)
1954
211.4 mm (8.3 in)
1955
184.4 mm (7.3 in)
1956
227.1 mm (8.9 in)
1957
167.4 mm (6.6 in)
1958
189.5 mm (7.5 in)
1959
193.6 mm (7.6 in)
1960
225.5 mm (8.9 in)
1961
220.2 mm (8.7 in)
1962
140.7 mm (5.5 in)
1963
137.2 mm (5.4 in)
1964
217.2 mm (8.6 in)
1965
240.6 mm (9.5 in)
1966
110.3 mm (4.3 in)
1967
130.8 mm (5.1 in)
1968
141.8 mm (5.6 in)
1969
182.5 mm (7.2 in)
1970
179.4 mm (7.1 in)
1971
259.9 mm (10.2 in)
1972
185.3 mm (7.3 in)
1973
84.1 mm (3.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Astor Exp STN, 1937 to 1973. The record is 51 days in 1951, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Astor Exp STN by year
Year
Longest dry spell (CDD)
1937
26 days
1938
31 days
1939
24 days
1940
29 days
1941
18 days
1942
16 days
1943
24 days
1944
15 days
1945
23 days
1946
22 days
1947
13 days
1948
11 days
1949
20 days
1950
27 days
1951
51 days
1952
37 days
1953
19 days
1954
13 days
1955
23 days
1956
26 days
1957
25 days
1958
23 days
1959
27 days
1960
30 days
1961
23 days
1962
19 days
1963
26 days
1964
12 days
1965
21 days
1966
14 days
1967
21 days
1968
24 days
1969
29 days
1970
36 days
1971
32 days
1972
34 days
1973
13 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
33 years with a frost
Across 33 years with a frost, the median last spring frost at Astor Exp STN falls on 4 May and the median first autumn frost on 19 October, which leaves a median of 166 days between them.
Fitted over all years, the growing season changes by -15.0 days per decade at this station.
Frost dates and growing season at Astor Exp STN
Measure
Median, all years
Earliest period
Recent period (1942 to 1972)
Recent against earliest
Fitted trend
Last spring frost
4 May
n/a
6 May
n/a
+9.2 days per decade
First autumn frost
19 October
n/a
19 October
n/a
-5.7 days per decade
Growing days
166 days
n/a
162 days
n/a
-15.0 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
34 years, 1937 to 1972
A day with at least 72.9 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 125.2 mm (4.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Astor Exp STN: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
72.9 mm (2.9 in)
5 years
90.4 mm (3.6 in)
10 years
100.4 mm (4.0 in)
25 years
111.5 mm (4.4 in)
50 years
118.7 mm (4.7 in)
Longer than the 34 years of record
100 years
125.2 mm (4.9 in)
Longer than the 34 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, 34 years of values from 1937 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: 129.3 mm (5.1 in) in 1964; 103.1 mm (4.1 in) in 1955; 100.3 mm (3.9 in) in 1950.
Download the Data
Data for Astor Exp STN standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Astor Exp STN 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.