Trinity Rvr Hatchery Weather Records (USC00049026)
Record envelope, standing records and threshold days for Trinity Rvr Hatchery (USC00049026), California, United States, with 53 years of record.
Key Facts for Trinity Rvr Hatchery
Trinity Rvr Hatchery (USC00049026) is a weather station in California, United States at 40.73 latitude and -122.79 longitude, 567 m (1,861 ft) above sea level.
The station reports from 1974 to 2026, 53 years of record.
1,464 records set at Trinity Rvr Hatchery still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Trinity Rvr Hatchery set a daily record low minimum temperature of 5.0 C (41.0 F) on 28 June 2026.
About the Station
Location: California, United States, 40.73 latitude, -122.79 longitude.
Elevation: 567 m (1,861 ft).
Period of record: 1974 to 2026, 53 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
3 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 Trinity Rvr Hatchery. The lines show the 2026 daily maximum and minimum. 3 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Trinity Rvr Hatchery, 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)
-11.1 C (12.0 F)
13.3 C (55.9 F)
-1.1 C (30.0 F)
Feb
27.2 C (81.0 F)
-12.2 C (10.0 F)
n/a
n/a
Mar
30.0 C (86.0 F)
-6.7 C (19.9 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-5.0 C (23.0 F)
n/a
n/a
May
39.4 C (102.9 F)
-2.8 C (27.0 F)
32.2 C (90.0 F)
1.1 C (34.0 F)
Jun
43.9 C (111.0 F)
0.6 C (33.1 F)
41.7 C (107.1 F)
5.0 C (41.0 F)
Jul
46.7 C (116.1 F)
2.8 C (37.0 F)
37.8 C (100.0 F)
7.2 C (45.0 F)
Aug
45.0 C (113.0 F)
3.3 C (37.9 F)
41.1 C (106.0 F)
7.2 C (45.0 F)
Sep
45.6 C (114.1 F)
0.0 C (32.0 F)
n/a
n/a
Oct
38.9 C (102.0 F)
-6.7 C (19.9 F)
n/a
n/a
Nov
28.3 C (82.9 F)
-9.4 C (15.1 F)
n/a
n/a
Dec
19.4 C (66.9 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 Trinity Rvr Hatchery still stand. 2022 holds the most, with 56.
Standing records at Trinity Rvr Hatchery by the year they were set
Year set
Standing records
1974
15
1975
46
1976
26
1977
26
1978
33
1979
24
1980
22
1981
34
1982
34
1983
43
1984
33
1985
34
1986
24
1987
33
1988
32
1989
32
1990
35
1991
21
1992
24
1993
44
1994
15
1995
38
1996
16
1997
7
1998
21
1999
18
2000
22
2001
16
2002
26
2003
24
2004
16
2005
21
2006
17
2007
29
2008
25
2009
28
2010
16
2011
20
2012
22
2013
32
2014
36
2015
36
2016
17
2017
26
2018
31
2019
30
2020
30
2021
35
2022
56
2023
35
2024
35
2025
47
2026
6
All-Time Record Progression
6 new records
6 all-time records were set at Trinity Rvr Hatchery between 2 February 2008 and 11 July 2024. Each dot is a new record.
When Trinity Rvr Hatchery set new all-time records
Date
Kind
Detail
2008-02-02
Record snow depth
Record snow depth 33.0 cm (13.0 in)
2008-02-03
Record snow depth
Record snow depth 53.3 cm (21.0 in)
2019-02-14
Record daily precipitation
Record daily precipitation 91.2 mm (3.6 in)
2021-07-11
Record high maximum temperature
Record high maximum temperature 45.6 C (114.1 F)
2022-07-29
Record high maximum temperature
Record high maximum temperature 46.7 C (116.1 F)
2024-07-11
Record high minimum temperature
Record high minimum temperature 21.1 C (70.0 F)
Wettest Day of Each Month
Feb: 91.2 mm (3.6 in)
The wettest day on record for each calendar month at Trinity Rvr Hatchery. The most was 91.2 mm (3.6 in) on 14 February 2019.
Record daily precipitation for each month at Trinity Rvr Hatchery
Month
Record daily precipitation (mm)
Date
Jan
88.6 mm (3.5 in)
11 January 1979
Feb
91.2 mm (3.6 in)
14 February 2019
Mar
74.9 mm (2.9 in)
18 March 1975
Apr
49.5 mm (1.9 in)
7 April 2018
May
78.0 mm (3.1 in)
31 May 1993
Jun
36.6 mm (1.4 in)
19 June 2005
Jul
46.7 mm (1.8 in)
9 July 2015
Aug
28.7 mm (1.1 in)
3 August 2003
Sep
67.3 mm (2.6 in)
17 September 1989
Oct
82.6 mm (3.3 in)
24 October 2010
Nov
67.3 mm (2.6 in)
22 November 2024
Dec
74.7 mm (2.9 in)
19 December 1981
Period of Record Coverage
1974 to 2026
Complete yearUnder 90 percent of days
53 years of record at Trinity Rvr Hatchery, 1974 to 2026. 3 years have data for under 90 percent of days and are left out of rankings: 1974, 1993, 2026.
Cooler than the station meanWarmer than the station mean
One stripe for each of 44 complete years at Trinity Rvr Hatchery, 1975 to 2025. Blue stripes are years cooler than the station's own mean of 13.0 C (55.3 F); red stripes are warmer. The coolest year was 1982, at 11.4 C (52.5 F), and the warmest was 2025, at 15.0 C (58.9 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Trinity Rvr Hatchery as warming stripes, 1975 to 2025
Year
Annual mean temperature
Difference from the station mean
1975
11.5 C
-1.42 C
1976
12.3 C
-0.71 C
1977
12.9 C
-0.06 C
1978
12.5 C
-0.48 C
1979
12.4 C
-0.59 C
1980
12.5 C
-0.49 C
1981
13.3 C
+0.29 C
1982
11.4 C
-1.58 C
1983
11.8 C
-1.12 C
1984
11.9 C
-1.04 C
1987
12.9 C
-0.05 C
1989
12.0 C
-0.93 C
1990
12.4 C
-0.60 C
1991
12.8 C
-0.18 C
1992
13.7 C
+0.74 C
1994
12.8 C
-0.20 C
1995
13.1 C
+0.10 C
1996
13.0 C
+0.04 C
1997
13.1 C
+0.12 C
1998
12.3 C
-0.71 C
1999
12.4 C
-0.58 C
2000
13.1 C
+0.10 C
2001
13.3 C
+0.32 C
2002
13.4 C
+0.39 C
2003
13.4 C
+0.43 C
2004
13.4 C
+0.44 C
2005
12.9 C
-0.06 C
2006
12.6 C
-0.41 C
2007
12.8 C
-0.14 C
2008
12.4 C
-0.52 C
2009
12.9 C
-0.08 C
2010
12.6 C
-0.36 C
2011
12.0 C
-0.92 C
2012
12.9 C
-0.07 C
2016
13.7 C
+0.74 C
2017
13.5 C
+0.54 C
2018
13.9 C
+0.91 C
2019
13.4 C
+0.42 C
2020
13.9 C
+0.98 C
2021
14.5 C
+1.49 C
2022
14.4 C
+1.42 C
2023
13.6 C
+0.60 C
2024
14.3 C
+1.38 C
2025
15.0 C
+2.00 C
The annual mean temperature here has risen by 0.4 C (0.3 to 0.5) per decade over 1975 to 2025. In Fahrenheit: 0.7 F (0.5 to 0.9) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Trinity Rvr Hatchery
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.4 C (0.3 to 0.5) per decade
0.7 F (0.5 to 0.9) per decade
1975 to 2025
44
Rise
Mean daily maximum
0.5 C (0.3 to 0.7) per decade
0.9 F (0.6 to 1.2) per decade
1975 to 2025
44
Rise
Mean daily minimum
0.2 C (0.1 to 0.4) per decade
0.4 F (0.2 to 0.6) per decade
1975 to 2025
44
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
1974 to 2026
Yearly extremes at Trinity Rvr Hatchery: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
46.7 C (116.1 F)
2022
41.7 C (107.1 F)
53
Coldest night (TNn)
-15.6 C (3.9 F)
1990
-7.2 C (19.0 F)
53
Wettest day (Rx1day)
91.2 mm (3.6 in)
2019
52.6 mm (2.1 in)
53
Wettest five days (Rx5day)
203.9 mm (8.0 in)
2005
115.3 mm (4.5 in)
53
Longest dry spell (CDD)
158 days
2002
73 days
53
Hottest day (TXx)
The hottest day of the year at Trinity Rvr Hatchery, 1974 to 2026. The record is 46.7 C (116.1 F) in 2022, marked on the chart; the median year is 41.7 C (107.1 F).
Hottest day (TXx) at Trinity Rvr Hatchery by year
Year
Hottest day (TXx)
1974
40.0 C (104.0 F)
1975
40.6 C (105.1 F)
1976
39.4 C (102.9 F)
1977
42.2 C (108.0 F)
1978
42.8 C (109.0 F)
1979
40.6 C (105.1 F)
1980
40.6 C (105.1 F)
1981
45.0 C (113.0 F)
1982
39.4 C (102.9 F)
1983
39.4 C (102.9 F)
1984
41.7 C (107.1 F)
1985
39.4 C (102.9 F)
1986
38.9 C (102.0 F)
1987
42.2 C (108.0 F)
1988
42.8 C (109.0 F)
1989
36.1 C (97.0 F)
1990
41.7 C (107.1 F)
1991
41.1 C (106.0 F)
1992
40.0 C (104.0 F)
1993
40.6 C (105.1 F)
1994
40.0 C (104.0 F)
1995
38.3 C (100.9 F)
1996
40.6 C (105.1 F)
1997
40.6 C (105.1 F)
1998
42.2 C (108.0 F)
1999
42.8 C (109.0 F)
2000
40.6 C (105.1 F)
2001
40.6 C (105.1 F)
2002
45.0 C (113.0 F)
2003
43.3 C (109.9 F)
2004
40.6 C (105.1 F)
2005
41.1 C (106.0 F)
2006
42.2 C (108.0 F)
2007
42.8 C (109.0 F)
2008
41.7 C (107.1 F)
2009
41.7 C (107.1 F)
2010
40.0 C (104.0 F)
2011
38.3 C (100.9 F)
2012
42.2 C (108.0 F)
2013
42.8 C (109.0 F)
2014
42.8 C (109.0 F)
2015
41.1 C (106.0 F)
2016
41.7 C (107.1 F)
2017
43.3 C (109.9 F)
2018
43.3 C (109.9 F)
2019
40.0 C (104.0 F)
2020
41.7 C (107.1 F)
2021
45.6 C (114.1 F)
2022
46.7 C (116.1 F)
2023
43.9 C (111.0 F)
2024
46.1 C (115.0 F)
2025
43.9 C (111.0 F)
2026
41.7 C (107.1 F)
Coldest night (TNn)
The coldest night of the year at Trinity Rvr Hatchery, 1974 to 2026. The record is -15.6 C (3.9 F) in 1990, marked on the chart; the median year is -7.2 C (19.0 F).
Coldest night (TNn) at Trinity Rvr Hatchery by year
Year
Coldest night (TNn)
1974
-2.2 C (28.0 F)
1975
-8.3 C (17.1 F)
1976
-7.8 C (18.0 F)
1977
-7.8 C (18.0 F)
1978
-9.4 C (15.1 F)
1979
-10.0 C (14.0 F)
1980
-9.4 C (15.1 F)
1981
-3.3 C (26.1 F)
1982
-7.8 C (18.0 F)
1983
-5.0 C (23.0 F)
1984
-6.1 C (21.0 F)
1985
-7.2 C (19.0 F)
1986
-5.0 C (23.0 F)
1987
-10.0 C (14.0 F)
1988
-5.6 C (21.9 F)
1989
-12.2 C (10.0 F)
1990
-15.6 C (3.9 F)
1991
-6.7 C (19.9 F)
1992
-4.4 C (24.1 F)
1993
-9.4 C (15.1 F)
1994
-5.6 C (21.9 F)
1995
-3.9 C (25.0 F)
1996
-4.4 C (24.1 F)
1997
-8.9 C (16.0 F)
1998
-12.8 C (9.0 F)
1999
-5.0 C (23.0 F)
2000
-5.0 C (23.0 F)
2001
-6.7 C (19.9 F)
2002
-7.2 C (19.0 F)
2003
-6.1 C (21.0 F)
2004
-6.1 C (21.0 F)
2005
-2.8 C (27.0 F)
2006
-6.1 C (21.0 F)
2007
-11.1 C (12.0 F)
2008
-6.1 C (21.0 F)
2009
-10.6 C (12.9 F)
2010
-6.1 C (21.0 F)
2011
-7.8 C (18.0 F)
2012
-8.9 C (16.0 F)
2013
-11.1 C (12.0 F)
2014
-7.2 C (19.0 F)
2015
-8.9 C (16.0 F)
2016
-6.7 C (19.9 F)
2017
-7.2 C (19.0 F)
2018
-7.2 C (19.0 F)
2019
-7.8 C (18.0 F)
2020
-7.2 C (19.0 F)
2021
-4.4 C (24.1 F)
2022
-7.8 C (18.0 F)
2023
-7.2 C (19.0 F)
2024
-4.4 C (24.1 F)
2025
-6.1 C (21.0 F)
2026
-1.1 C (30.0 F)
Wettest day (Rx1day)
The wettest day of the year at Trinity Rvr Hatchery, 1974 to 2026. The record is 91.2 mm (3.6 in) in 2019, marked on the chart; the median year is 52.6 mm (2.1 in).
Wettest day (Rx1day) at Trinity Rvr Hatchery by year
Year
Wettest day (Rx1day)
1974
37.3 mm (1.5 in)
1975
74.9 mm (2.9 in)
1976
41.9 mm (1.6 in)
1977
67.3 mm (2.6 in)
1978
38.9 mm (1.5 in)
1979
88.6 mm (3.5 in)
1980
42.7 mm (1.7 in)
1981
74.7 mm (2.9 in)
1982
50.8 mm (2.0 in)
1983
59.2 mm (2.3 in)
1984
38.6 mm (1.5 in)
1985
50.5 mm (2.0 in)
1986
63.5 mm (2.5 in)
1987
43.7 mm (1.7 in)
1988
55.9 mm (2.2 in)
1989
67.3 mm (2.6 in)
1990
69.9 mm (2.8 in)
1991
50.3 mm (2.0 in)
1992
69.1 mm (2.7 in)
1993
78.0 mm (3.1 in)
1994
40.6 mm (1.6 in)
1995
58.4 mm (2.3 in)
1996
56.9 mm (2.2 in)
1997
48.8 mm (1.9 in)
1998
50.8 mm (2.0 in)
1999
53.8 mm (2.1 in)
2000
46.2 mm (1.8 in)
2001
52.6 mm (2.1 in)
2002
61.7 mm (2.4 in)
2003
57.2 mm (2.3 in)
2004
72.9 mm (2.9 in)
2005
66.0 mm (2.6 in)
2006
37.6 mm (1.5 in)
2007
43.9 mm (1.7 in)
2008
46.5 mm (1.8 in)
2009
39.1 mm (1.5 in)
2010
82.6 mm (3.3 in)
2011
47.5 mm (1.9 in)
2012
52.8 mm (2.1 in)
2013
21.6 mm (0.9 in)
2014
58.4 mm (2.3 in)
2015
47.2 mm (1.9 in)
2016
46.5 mm (1.8 in)
2017
34.8 mm (1.4 in)
2018
49.5 mm (1.9 in)
2019
91.2 mm (3.6 in)
2020
25.4 mm (1.0 in)
2021
50.8 mm (2.0 in)
2022
58.4 mm (2.3 in)
2023
55.9 mm (2.2 in)
2024
67.3 mm (2.6 in)
2025
52.8 mm (2.1 in)
2026
37.3 mm (1.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Trinity Rvr Hatchery, 1974 to 2026. The record is 203.9 mm (8.0 in) in 2005, marked on the chart; the median year is 115.3 mm (4.5 in).
Wettest five days (Rx5day) at Trinity Rvr Hatchery by year
Year
Wettest five days (Rx5day)
1974
44.9 mm (1.8 in)
1975
154.7 mm (6.1 in)
1976
81.6 mm (3.2 in)
1977
166.1 mm (6.5 in)
1978
110.1 mm (4.3 in)
1979
120.1 mm (4.7 in)
1980
108.1 mm (4.3 in)
1981
147.0 mm (5.8 in)
1982
101.1 mm (4.0 in)
1983
189.8 mm (7.5 in)
1984
123.4 mm (4.9 in)
1985
88.1 mm (3.5 in)
1986
179.0 mm (7.0 in)
1987
107.3 mm (4.2 in)
1988
113.7 mm (4.5 in)
1989
108.7 mm (4.3 in)
1990
109.8 mm (4.3 in)
1991
108.3 mm (4.3 in)
1992
138.5 mm (5.5 in)
1993
137.3 mm (5.4 in)
1994
58.9 mm (2.3 in)
1995
175.6 mm (6.9 in)
1996
120.4 mm (4.7 in)
1997
150.4 mm (5.9 in)
1998
134.7 mm (5.3 in)
1999
90.9 mm (3.6 in)
2000
101.6 mm (4.0 in)
2001
120.9 mm (4.8 in)
2002
175.2 mm (6.9 in)
2003
122.2 mm (4.8 in)
2004
136.4 mm (5.4 in)
2005
203.9 mm (8.0 in)
2006
188.1 mm (7.4 in)
2007
60.6 mm (2.4 in)
2008
108.8 mm (4.3 in)
2009
86.1 mm (3.4 in)
2010
135.3 mm (5.3 in)
2011
103.1 mm (4.1 in)
2012
140.6 mm (5.5 in)
2013
35.8 mm (1.4 in)
2014
79.5 mm (3.1 in)
2015
100.3 mm (3.9 in)
2016
115.3 mm (4.5 in)
2017
117.3 mm (4.6 in)
2018
87.2 mm (3.4 in)
2019
102.4 mm (4.0 in)
2020
46.3 mm (1.8 in)
2021
90.5 mm (3.6 in)
2022
124.0 mm (4.9 in)
2023
159.7 mm (6.3 in)
2024
149.9 mm (5.9 in)
2025
179.0 mm (7.0 in)
2026
78.8 mm (3.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Trinity Rvr Hatchery, 1974 to 2026. The record is 158 days in 2002, marked on the chart; the median year is 73 days.
Longest dry spell (CDD) at Trinity Rvr Hatchery by year
Year
Longest dry spell (CDD)
1974
82 days
1975
43 days
1976
44 days
1977
44 days
1978
59 days
1979
63 days
1980
92 days
1981
80 days
1982
74 days
1983
35 days
1984
132 days
1985
49 days
1986
86 days
1987
153 days
1988
75 days
1989
78 days
1990
45 days
1991
56 days
1992
92 days
1993
121 days
1994
128 days
1995
120 days
1996
60 days
1997
26 days
1998
47 days
1999
68 days
2000
58 days
2001
88 days
2002
158 days
2003
86 days
2004
74 days
2005
110 days
2006
58 days
2007
42 days
2008
57 days
2009
52 days
2010
71 days
2011
67 days
2012
73 days
2013
45 days
2014
138 days
2015
66 days
2016
106 days
2017
86 days
2018
128 days
2019
94 days
2020
53 days
2021
89 days
2022
74 days
2023
51 days
2024
104 days
2025
50 days
2026
72 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
44 years with a frost
Across 44 years with a frost, the median last spring frost at Trinity Rvr Hatchery falls on 22 April and the median first autumn frost on 18 October, which leaves a median of 176 days between them.
Fitted over all years, the growing season changes by +4.4 days per decade at this station.
Frost dates and growing season at Trinity Rvr Hatchery
Measure
Median, all years
Earliest period
Recent period (1992 to 2025)
Recent against earliest
Fitted trend
Last spring frost
22 April
n/a
20 April
n/a
-4.4 days per decade
First autumn frost
18 October
n/a
17 October
n/a
0.0 days per decade
Growing days
176 days
n/a
177 days
n/a
+4.4 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
51 years, 1975 to 2025
A day with at least 53.6 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 94.5 mm (3.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Trinity Rvr Hatchery: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
53.6 mm (2.1 in)
5 years
66.9 mm (2.6 in)
10 years
74.7 mm (2.9 in)
25 years
83.4 mm (3.3 in)
50 years
89.2 mm (3.5 in)
100 years
94.5 mm (3.7 in)
Longer than the 51 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, 51 years of values from 1975 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: 91.2 mm (3.6 in) in 2019; 88.6 mm (3.5 in) in 1979; 82.6 mm (3.3 in) in 2010.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Trinity Rvr Hatchery standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Trinity Rvr Hatchery 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.