Hilts Slash Disposal Weather Records (USC00043987)
Record envelope, standing records and threshold days for Hilts Slash Disposal (USC00043987), California, United States, with 46 years of record.
Key Facts for Hilts Slash Disposal
Hilts Slash Disposal (USC00043987) is a weather station in California, United States at 42.00 latitude and -122.63 longitude, 885 m (2,904 ft) above sea level.
The station reports from 1939 to 1984, 46 years of record.
1,464 records set at Hilts Slash Disposal still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Hilts Slash Disposal tied a daily record snow depth of 15.2 cm (6.0 in) on 2 December 1984.
About the Station
Location: California, United States, 42.00 latitude, -122.63 longitude.
Elevation: 885 m (2,904 ft).
Period of record: 1939 to 1984, 46 years.
Eligible elements: 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 Hilts Slash Disposal. 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 Hilts Slash Disposal, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
17.8 C (64.0 F)
-23.3 C (-9.9 F)
n/a
n/a
Feb
21.1 C (70.0 F)
-16.7 C (1.9 F)
n/a
n/a
Mar
25.6 C (78.1 F)
-10.0 C (14.0 F)
n/a
n/a
Apr
29.4 C (84.9 F)
-7.2 C (19.0 F)
n/a
n/a
May
36.1 C (97.0 F)
-5.0 C (23.0 F)
n/a
n/a
Jun
40.6 C (105.1 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
40.6 C (105.1 F)
-0.6 C (30.9 F)
n/a
n/a
Aug
43.9 C (111.0 F)
2.2 C (36.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-2.2 C (28.0 F)
n/a
n/a
Oct
35.0 C (95.0 F)
-9.4 C (15.1 F)
n/a
n/a
Nov
25.0 C (77.0 F)
-13.3 C (8.1 F)
n/a
n/a
Dec
17.8 C (64.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Hilts Slash Disposal still stand. 1981 holds the most, with 80.
Standing records at Hilts Slash Disposal by the year they were set
Year set
Standing records
1959
22
1960
55
1961
53
1962
65
1963
69
1964
63
1965
57
1966
67
1967
66
1968
70
1969
62
1970
59
1971
55
1972
68
1973
45
1974
57
1975
65
1976
59
1977
46
1978
54
1979
51
1980
60
1981
80
1982
40
1983
50
1984
26
Wettest Day of Each Month
Dec: 101.6 mm (4.0 in)
The wettest day on record for each calendar month at Hilts Slash Disposal. The most was 101.6 mm (4.0 in) on 22 December 1955.
Record daily precipitation for each month at Hilts Slash Disposal
Month
Record daily precipitation (mm)
Date
Jan
82.8 mm (3.3 in)
16 January 1974
Feb
76.2 mm (3.0 in)
5 February 1951
Mar
71.1 mm (2.8 in)
18 March 1975
Apr
23.4 mm (0.9 in)
20 April 1980
May
39.6 mm (1.6 in)
13 May 1969
Jun
37.6 mm (1.5 in)
9 June 1958
Jul
21.3 mm (0.8 in)
29 July 1944
Aug
44.5 mm (1.8 in)
1 August 1976
Sep
27.7 mm (1.1 in)
5 September 1978
Oct
62.5 mm (2.5 in)
30 October 1956
Nov
56.4 mm (2.2 in)
15 November 1981
Dec
101.6 mm (4.0 in)
22 December 1955
Period of Record Coverage
1959 to 1984
Complete yearUnder 90 percent of days
26 years of record at Hilts Slash Disposal, 1959 to 1984. 6 years have data for under 90 percent of days and are left out of rankings: 1959, 1969, 1974, 1982, 1983, 1984.
Cooler than the station meanWarmer than the station mean
One stripe for each of 20 complete years at Hilts Slash Disposal, 1960 to 1982. Blue stripes are years cooler than the station's own mean of 10.0 C (50.1 F); red stripes are warmer. The coolest year was 1971, at 9.1 C (48.3 F), and the warmest was 1981, at 11.6 C (52.8 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Hilts Slash Disposal as warming stripes, 1960 to 1982
Year
Annual mean temperature
Difference from the station mean
1960
9.9 C
-0.11 C
1961
10.1 C
+0.04 C
1962
9.3 C
-0.73 C
1963
9.6 C
-0.49 C
1964
9.1 C
-0.97 C
1965
10.0 C
-0.04 C
1966
10.1 C
+0.07 C
1967
10.0 C
-0.05 C
1968
9.8 C
-0.29 C
1970
10.2 C
+0.12 C
1971
9.1 C
-0.99 C
1972
9.8 C
-0.22 C
1973
10.2 C
+0.13 C
1975
9.5 C
-0.58 C
1976
10.6 C
+0.52 C
1977
10.5 C
+0.50 C
1979
10.9 C
+0.86 C
1980
11.0 C
+0.92 C
1981
11.6 C
+1.53 C
1982
9.8 C
-0.26 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1939 to 1984
Yearly extremes at Hilts Slash Disposal: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.9 C (111.0 F)
1981
38.3 C (100.9 F)
26
Coldest night (TNn)
-24.4 C (-11.9 F)
1972
-14.1 C (6.5 F)
26
Wettest day (Rx1day)
101.6 mm (4.0 in)
1955
44.9 mm (1.8 in)
46
Wettest five days (Rx5day)
237.3 mm (9.3 in)
1964
81.3 mm (3.2 in)
46
Longest dry spell (CDD)
142 days
1951
48 days
46
Hottest day (TXx)
The hottest day of the year at Hilts Slash Disposal, 1939 to 1984. The record is 43.9 C (111.0 F) in 1981, marked on the chart; the median year is 38.3 C (100.9 F).
Hottest day (TXx) at Hilts Slash Disposal by year
Year
Hottest day (TXx)
1939
n/a
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
32.8 C (91.0 F)
1960
37.8 C (100.0 F)
1961
38.3 C (100.9 F)
1962
36.1 C (97.0 F)
1963
36.7 C (98.1 F)
1964
37.8 C (100.0 F)
1965
36.1 C (97.0 F)
1966
37.2 C (99.0 F)
1967
38.9 C (102.0 F)
1968
38.3 C (100.9 F)
1969
36.1 C (97.0 F)
1970
40.6 C (105.1 F)
1971
40.6 C (105.1 F)
1972
41.1 C (106.0 F)
1973
37.8 C (100.0 F)
1974
38.3 C (100.9 F)
1975
38.3 C (100.9 F)
1976
37.8 C (100.0 F)
1977
40.6 C (105.1 F)
1978
41.1 C (106.0 F)
1979
38.9 C (102.0 F)
1980
40.0 C (104.0 F)
1981
43.9 C (111.0 F)
1982
38.3 C (100.9 F)
1983
37.2 C (99.0 F)
1984
41.1 C (106.0 F)
Coldest night (TNn)
The coldest night of the year at Hilts Slash Disposal, 1939 to 1984. The record is -24.4 C (-11.9 F) in 1972, marked on the chart; the median year is -14.1 C (6.5 F).
Coldest night (TNn) at Hilts Slash Disposal by year
Year
Coldest night (TNn)
1939
n/a
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
-10.0 C (14.0 F)
1960
-15.0 C (5.0 F)
1961
-12.2 C (10.0 F)
1962
-23.3 C (-9.9 F)
1963
-15.6 C (3.9 F)
1964
-9.4 C (15.1 F)
1965
-13.3 C (8.1 F)
1966
-15.0 C (5.0 F)
1967
-18.3 C (-0.9 F)
1968
-16.7 C (1.9 F)
1969
-18.3 C (-0.9 F)
1970
-12.8 C (9.0 F)
1971
-12.8 C (9.0 F)
1972
-24.4 C (-11.9 F)
1973
-13.3 C (8.1 F)
1974
-15.6 C (3.9 F)
1975
-15.6 C (3.9 F)
1976
-12.2 C (10.0 F)
1977
-16.7 C (1.9 F)
1978
-13.3 C (8.1 F)
1979
-13.3 C (8.1 F)
1980
-15.0 C (5.0 F)
1981
-7.2 C (19.0 F)
1982
-17.8 C (0.0 F)
1983
-11.7 C (10.9 F)
1984
-13.3 C (8.1 F)
Wettest day (Rx1day)
The wettest day of the year at Hilts Slash Disposal, 1939 to 1984. The record is 101.6 mm (4.0 in) in 1955, marked on the chart; the median year is 44.9 mm (1.8 in).
Wettest day (Rx1day) at Hilts Slash Disposal by year
Year
Wettest day (Rx1day)
1939
76.2 mm (3.0 in)
1940
18.3 mm (0.7 in)
1941
70.9 mm (2.8 in)
1942
21.1 mm (0.8 in)
1943
38.1 mm (1.5 in)
1944
23.1 mm (0.9 in)
1945
65.8 mm (2.6 in)
1946
55.9 mm (2.2 in)
1947
25.4 mm (1.0 in)
1948
50.8 mm (2.0 in)
1949
20.3 mm (0.8 in)
1950
55.1 mm (2.2 in)
1951
76.2 mm (3.0 in)
1952
35.6 mm (1.4 in)
1953
42.4 mm (1.7 in)
1954
26.7 mm (1.1 in)
1955
101.6 mm (4.0 in)
1956
74.2 mm (2.9 in)
1957
37.1 mm (1.5 in)
1958
41.1 mm (1.6 in)
1959
19.3 mm (0.8 in)
1960
50.8 mm (2.0 in)
1961
40.6 mm (1.6 in)
1962
48.5 mm (1.9 in)
1963
45.2 mm (1.8 in)
1964
101.6 mm (4.0 in)
1965
25.4 mm (1.0 in)
1966
53.8 mm (2.1 in)
1967
45.5 mm (1.8 in)
1968
25.4 mm (1.0 in)
1969
50.8 mm (2.0 in)
1970
39.9 mm (1.6 in)
1971
32.0 mm (1.3 in)
1972
50.8 mm (2.0 in)
1973
42.7 mm (1.7 in)
1974
82.8 mm (3.3 in)
1975
71.1 mm (2.8 in)
1976
44.5 mm (1.8 in)
1977
45.7 mm (1.8 in)
1978
33.3 mm (1.3 in)
1979
39.4 mm (1.6 in)
1980
67.8 mm (2.7 in)
1981
91.4 mm (3.6 in)
1982
49.5 mm (1.9 in)
1983
38.1 mm (1.5 in)
1984
36.1 mm (1.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Hilts Slash Disposal, 1939 to 1984. The record is 237.3 mm (9.3 in) in 1964, marked on the chart; the median year is 81.3 mm (3.2 in).
Wettest five days (Rx5day) at Hilts Slash Disposal by year
Year
Wettest five days (Rx5day)
1939
126.0 mm (5.0 in)
1940
24.6 mm (1.0 in)
1941
90.7 mm (3.6 in)
1942
54.4 mm (2.1 in)
1943
46.8 mm (1.8 in)
1944
47.3 mm (1.9 in)
1945
124.2 mm (4.9 in)
1946
109.3 mm (4.3 in)
1947
34.8 mm (1.4 in)
1948
133.9 mm (5.3 in)
1949
36.6 mm (1.4 in)
1950
73.1 mm (2.9 in)
1951
84.8 mm (3.3 in)
1952
46.2 mm (1.8 in)
1953
35.6 mm (1.4 in)
1954
45.5 mm (1.8 in)
1955
153.7 mm (6.1 in)
1956
110.5 mm (4.4 in)
1957
50.1 mm (2.0 in)
1958
86.6 mm (3.4 in)
1959
43.3 mm (1.7 in)
1960
129.6 mm (5.1 in)
1961
71.3 mm (2.8 in)
1962
172.3 mm (6.8 in)
1963
96.0 mm (3.8 in)
1964
237.3 mm (9.3 in)
1965
50.8 mm (2.0 in)
1966
163.8 mm (6.4 in)
1967
74.8 mm (2.9 in)
1968
51.3 mm (2.0 in)
1969
100.7 mm (4.0 in)
1970
110.3 mm (4.3 in)
1971
77.7 mm (3.1 in)
1972
123.3 mm (4.9 in)
1973
76.7 mm (3.0 in)
1974
176.3 mm (6.9 in)
1975
104.6 mm (4.1 in)
1976
64.3 mm (2.5 in)
1977
116.7 mm (4.6 in)
1978
62.4 mm (2.5 in)
1979
73.0 mm (2.9 in)
1980
120.6 mm (4.7 in)
1981
171.5 mm (6.8 in)
1982
116.9 mm (4.6 in)
1983
66.9 mm (2.6 in)
1984
62.1 mm (2.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Hilts Slash Disposal, 1939 to 1984. The record is 142 days in 1951, marked on the chart; the median year is 48 days.
Longest dry spell (CDD) at Hilts Slash Disposal by year
Year
Longest dry spell (CDD)
1939
41 days
1940
48 days
1941
29 days
1942
19 days
1943
76 days
1944
40 days
1945
39 days
1946
45 days
1947
40 days
1948
37 days
1949
40 days
1950
47 days
1951
142 days
1952
29 days
1953
74 days
1954
60 days
1955
39 days
1956
35 days
1957
75 days
1958
24 days
1959
51 days
1960
67 days
1961
31 days
1962
48 days
1963
67 days
1964
56 days
1965
39 days
1966
45 days
1967
67 days
1968
55 days
1969
51 days
1970
61 days
1971
40 days
1972
65 days
1973
60 days
1974
99 days
1975
32 days
1976
59 days
1977
38 days
1978
44 days
1979
56 days
1980
50 days
1981
103 days
1982
46 days
1983
71 days
1984
38 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
20 years with a frost
Across 20 years with a frost, the median last spring frost at Hilts Slash Disposal falls on 27 May and the median first autumn frost on 26 September, which leaves a median of 122 days between them.
Frost dates and growing season at Hilts Slash Disposal
Measure
Median, all years
Earliest period
Recent period (1960 to 1982)
Recent against earliest
Fitted trend
Last spring frost
27 May
n/a
27 May
n/a
n/a
First autumn frost
26 September
n/a
26 September
n/a
n/a
Growing days
122 days
n/a
122 days
n/a
n/a
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
36 years, 1944 to 1983
A day with at least 45.1 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 124.8 mm (4.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Hilts Slash Disposal: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
45.1 mm (1.8 in)
5 years
64.9 mm (2.6 in)
10 years
78.6 mm (3.1 in)
25 years
96.6 mm (3.8 in)
50 years
110.5 mm (4.4 in)
Longer than the 36 years of record
100 years
124.8 mm (4.9 in)
Longer than the 36 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, 36 years of values from 1944 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: 101.6 mm (4.0 in) in 1955; 101.6 mm (4.0 in) in 1964; 91.4 mm (3.6 in) in 1981.
Download the Data
Data for Hilts Slash Disposal standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hilts Slash Disposal 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.