Record envelope, standing records and threshold days for Mono Lake (USC00045779), California, United States, with 45 years of record.
Key Facts for Mono Lake
Mono Lake (USC00045779) is a weather station in California, United States at 38.00 latitude and -119.15 longitude, 1,966 m (6,449 ft) above sea level.
The station reports from 1944 to 1988, 45 years of record.
1,464 records set at Mono Lake still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Mono Lake set a daily record low maximum temperature of -1.7 C (28.9 F) on 19 January 1988.
About the Station
Location: California, United States, 38.00 latitude, -119.15 longitude.
Elevation: 1,966 m (6,449 ft).
Period of record: 1944 to 1988, 45 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 Mono Lake. 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 Mono Lake, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.9 C (66.0 F)
-21.1 C (-6.0 F)
n/a
n/a
Feb
20.0 C (68.0 F)
-20.0 C (-4.0 F)
n/a
n/a
Mar
22.2 C (72.0 F)
-17.2 C (1.0 F)
n/a
n/a
Apr
26.7 C (80.1 F)
-11.1 C (12.0 F)
n/a
n/a
May
30.6 C (87.1 F)
-8.9 C (16.0 F)
n/a
n/a
Jun
35.6 C (96.1 F)
-3.9 C (25.0 F)
n/a
n/a
Jul
36.1 C (97.0 F)
1.7 C (35.1 F)
n/a
n/a
Aug
35.0 C (95.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
32.8 C (91.0 F)
-7.8 C (18.0 F)
n/a
n/a
Oct
29.4 C (84.9 F)
-13.3 C (8.1 F)
n/a
n/a
Nov
23.3 C (73.9 F)
-13.9 C (7.0 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-20.0 C (-4.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Mono Lake still stand. 1954 holds the most, with 62.
Standing records at Mono Lake by the year they were set
Year set
Standing records
1944
33
1950
10
1951
42
1952
35
1953
39
1954
62
1955
40
1956
31
1957
31
1958
31
1959
33
1960
43
1961
33
1962
40
1963
31
1964
45
1965
43
1966
36
1967
42
1968
35
1969
36
1970
30
1971
46
1972
47
1973
28
1974
25
1975
35
1976
43
1977
40
1978
37
1979
31
1980
35
1981
42
1982
45
1983
38
1984
37
1985
36
1986
48
1987
48
1988
2
All-Time Record Progression
1 new records
1 all-time records were set at Mono Lake between 6 September 1984 and 6 September 1984. Each dot is a new record.
When Mono Lake set new all-time records
Date
Kind
Detail
1984-09-06
Record high minimum temperature
Record high minimum temperature 18.3 C (64.9 F)
Wettest Day of Each Month
Jan: 155.7 mm (6.1 in)
The wettest day on record for each calendar month at Mono Lake. The most was 155.7 mm (6.1 in) on 31 January 1963.
Record daily precipitation for each month at Mono Lake
Month
Record daily precipitation (mm)
Date
Jan
155.7 mm (6.1 in)
31 January 1963
Feb
90.4 mm (3.6 in)
17 February 1986
Mar
57.4 mm (2.3 in)
8 March 1986
Apr
66.8 mm (2.6 in)
11 April 1982
May
26.7 mm (1.1 in)
31 May 1961
Jun
32.0 mm (1.3 in)
9 June 1977
Jul
63.5 mm (2.5 in)
21 July 1955
Aug
34.3 mm (1.4 in)
22 August 1961
Sep
35.3 mm (1.4 in)
10 September 1975
Oct
34.0 mm (1.3 in)
26 October 1982
Nov
133.4 mm (5.3 in)
18 November 1950
Dec
142.5 mm (5.6 in)
23 December 1955
Period of Record Coverage
1944 to 1988
Complete yearUnder 90 percent of days
40 years of record at Mono Lake, 1944 to 1988. 3 years have data for under 90 percent of days and are left out of rankings: 1944, 1950, 1988.
Cooler than the station meanWarmer than the station mean
One stripe for each of 37 complete years at Mono Lake, 1951 to 1987. Blue stripes are years cooler than the station's own mean of 8.6 C (47.5 F); red stripes are warmer. The coolest year was 1982, at 7.1 C (44.9 F), and the warmest was 1959, at 9.8 C (49.6 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Mono Lake as warming stripes, 1951 to 1987
Year
Annual mean temperature
Difference from the station mean
1951
9.4 C
+0.82 C
1952
8.3 C
-0.34 C
1953
9.3 C
+0.63 C
1954
9.5 C
+0.89 C
1955
8.5 C
-0.08 C
1956
8.9 C
+0.29 C
1957
8.8 C
+0.14 C
1958
9.7 C
+1.07 C
1959
9.8 C
+1.15 C
1960
9.5 C
+0.84 C
1961
9.3 C
+0.65 C
1962
8.6 C
-0.05 C
1963
8.9 C
+0.28 C
1964
8.6 C
-0.07 C
1965
7.7 C
-0.96 C
1966
9.2 C
+0.59 C
1967
8.4 C
-0.20 C
1968
8.9 C
+0.30 C
1969
8.2 C
-0.43 C
1970
9.0 C
+0.38 C
1971
8.2 C
-0.40 C
1972
8.1 C
-0.57 C
1973
8.3 C
-0.33 C
1974
9.1 C
+0.45 C
1975
8.0 C
-0.65 C
1976
8.5 C
-0.15 C
1977
8.8 C
+0.15 C
1978
7.3 C
-1.35 C
1979
8.5 C
-0.14 C
1980
8.1 C
-0.48 C
1981
9.4 C
+0.80 C
1982
7.1 C
-1.48 C
1983
7.5 C
-1.08 C
1984
8.4 C
-0.23 C
1985
7.9 C
-0.72 C
1986
8.9 C
+0.26 C
1987
8.5 C
-0.12 C
The annual mean temperature here has fallen by 0.3 C (0.1 to 0.5) per decade over 1951 to 1987. In Fahrenheit: 0.6 F (0.2 to 0.9) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Mono Lake
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.3 C (-0.5 to -0.1) per decade
-0.6 F (-0.9 to -0.2) per decade
1951 to 1987
37
Fall
Mean daily maximum
-0.1 C (-0.4 to 0.1) per decade
-0.2 F (-0.6 to 0.2) per decade
1951 to 1987
37
Not clearly different from zero
Mean daily minimum
-0.5 C (-0.7 to -0.3) per decade
-0.9 F (-1.2 to -0.6) per decade
1951 to 1987
37
Fall
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
1944 to 1988
Yearly extremes at Mono Lake: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
36.1 C (97.0 F)
1972
33.9 C (93.0 F)
40
Coldest night (TNn)
-21.1 C (-6.0 F)
1974
-15.3 C (4.5 F)
40
Wettest day (Rx1day)
155.7 mm (6.1 in)
1963
37.8 mm (1.5 in)
40
Wettest five days (Rx5day)
328.5 mm (12.9 in)
1955
72.5 mm (2.9 in)
40
Longest dry spell (CDD)
134 days
1968
57 days
40
Hottest day (TXx)
The hottest day of the year at Mono Lake, 1944 to 1988. The record is 36.1 C (97.0 F) in 1972, marked on the chart; the median year is 33.9 C (93.0 F).
Hottest day (TXx) at Mono Lake by year
Year
Hottest day (TXx)
1944
33.3 C (91.9 F)
1950
24.4 C (75.9 F)
1951
32.8 C (91.0 F)
1952
32.2 C (90.0 F)
1953
32.8 C (91.0 F)
1954
35.6 C (96.1 F)
1955
33.3 C (91.9 F)
1956
32.8 C (91.0 F)
1957
33.9 C (93.0 F)
1958
34.4 C (93.9 F)
1959
34.4 C (93.9 F)
1960
33.9 C (93.0 F)
1961
34.4 C (93.9 F)
1962
32.2 C (90.0 F)
1963
32.2 C (90.0 F)
1964
33.9 C (93.0 F)
1965
31.7 C (89.1 F)
1966
35.0 C (95.0 F)
1967
33.3 C (91.9 F)
1968
33.9 C (93.0 F)
1969
33.9 C (93.0 F)
1970
34.4 C (93.9 F)
1971
35.0 C (95.0 F)
1972
36.1 C (97.0 F)
1973
33.9 C (93.0 F)
1974
33.3 C (91.9 F)
1975
33.9 C (93.0 F)
1976
33.9 C (93.0 F)
1977
33.9 C (93.0 F)
1978
34.4 C (93.9 F)
1979
35.0 C (95.0 F)
1980
35.0 C (95.0 F)
1981
35.0 C (95.0 F)
1982
32.8 C (91.0 F)
1983
32.2 C (90.0 F)
1984
33.3 C (91.9 F)
1985
33.9 C (93.0 F)
1986
32.8 C (91.0 F)
1987
31.7 C (89.1 F)
1988
15.0 C (59.0 F)
Coldest night (TNn)
The coldest night of the year at Mono Lake, 1944 to 1988. The record is -21.1 C (-6.0 F) in 1974, marked on the chart; the median year is -15.3 C (4.5 F).
Coldest night (TNn) at Mono Lake by year
Year
Coldest night (TNn)
1944
-17.2 C (1.0 F)
1950
-8.3 C (17.1 F)
1951
-14.4 C (6.1 F)
1952
-14.4 C (6.1 F)
1953
-11.7 C (10.9 F)
1954
-13.9 C (7.0 F)
1955
-14.4 C (6.1 F)
1956
-16.7 C (1.9 F)
1957
-18.9 C (-2.0 F)
1958
-10.6 C (12.9 F)
1959
-12.8 C (9.0 F)
1960
-15.6 C (3.9 F)
1961
-12.2 C (10.0 F)
1962
-20.0 C (-4.0 F)
1963
-18.9 C (-2.0 F)
1964
-15.0 C (5.0 F)
1965
-17.2 C (1.0 F)
1966
-15.0 C (5.0 F)
1967
-19.4 C (-2.9 F)
1968
-16.7 C (1.9 F)
1969
-16.1 C (3.0 F)
1970
-12.2 C (10.0 F)
1971
-17.8 C (0.0 F)
1972
-20.0 C (-4.0 F)
1973
-14.4 C (6.1 F)
1974
-21.1 C (-6.0 F)
1975
-15.0 C (5.0 F)
1976
-13.9 C (7.0 F)
1977
-13.9 C (7.0 F)
1978
-16.1 C (3.0 F)
1979
-17.2 C (1.0 F)
1980
-12.8 C (9.0 F)
1981
-12.2 C (10.0 F)
1982
-16.1 C (3.0 F)
1983
-16.1 C (3.0 F)
1984
-16.7 C (1.9 F)
1985
-16.1 C (3.0 F)
1986
-12.8 C (9.0 F)
1987
-17.2 C (1.0 F)
1988
-13.9 C (7.0 F)
Wettest day (Rx1day)
The wettest day of the year at Mono Lake, 1944 to 1988. The record is 155.7 mm (6.1 in) in 1963, marked on the chart; the median year is 37.8 mm (1.5 in).
Wettest day (Rx1day) at Mono Lake by year
Year
Wettest day (Rx1day)
1944
32.3 mm (1.3 in)
1950
133.4 mm (5.3 in)
1951
40.6 mm (1.6 in)
1952
28.4 mm (1.1 in)
1953
19.1 mm (0.8 in)
1954
42.7 mm (1.7 in)
1955
142.5 mm (5.6 in)
1956
27.7 mm (1.1 in)
1957
33.3 mm (1.3 in)
1958
43.9 mm (1.7 in)
1959
45.5 mm (1.8 in)
1960
28.7 mm (1.1 in)
1961
34.3 mm (1.4 in)
1962
44.5 mm (1.8 in)
1963
155.7 mm (6.1 in)
1964
35.8 mm (1.4 in)
1965
31.0 mm (1.2 in)
1966
57.2 mm (2.3 in)
1967
36.8 mm (1.4 in)
1968
26.7 mm (1.1 in)
1969
71.1 mm (2.8 in)
1970
53.3 mm (2.1 in)
1971
44.5 mm (1.8 in)
1972
33.0 mm (1.3 in)
1973
38.9 mm (1.5 in)
1974
23.1 mm (0.9 in)
1975
35.3 mm (1.4 in)
1976
19.3 mm (0.8 in)
1977
50.8 mm (2.0 in)
1978
36.8 mm (1.4 in)
1979
80.5 mm (3.2 in)
1980
46.5 mm (1.8 in)
1981
50.8 mm (2.0 in)
1982
66.8 mm (2.6 in)
1983
53.3 mm (2.1 in)
1984
27.9 mm (1.1 in)
1985
34.3 mm (1.4 in)
1986
90.4 mm (3.6 in)
1987
32.0 mm (1.3 in)
1988
14.2 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Mono Lake, 1944 to 1988. The record is 328.5 mm (12.9 in) in 1955, marked on the chart; the median year is 72.5 mm (2.9 in).
Wettest five days (Rx5day) at Mono Lake by year
Year
Wettest five days (Rx5day)
1944
56.6 mm (2.2 in)
1950
205.3 mm (8.1 in)
1951
74.2 mm (2.9 in)
1952
74.2 mm (2.9 in)
1953
21.4 mm (0.8 in)
1954
57.4 mm (2.3 in)
1955
328.5 mm (12.9 in)
1956
34.8 mm (1.4 in)
1957
55.9 mm (2.2 in)
1958
52.3 mm (2.1 in)
1959
66.9 mm (2.6 in)
1960
56.0 mm (2.2 in)
1961
56.4 mm (2.2 in)
1962
131.1 mm (5.2 in)
1963
287.1 mm (11.3 in)
1964
91.2 mm (3.6 in)
1965
65.5 mm (2.6 in)
1966
155.3 mm (6.1 in)
1967
73.9 mm (2.9 in)
1968
36.6 mm (1.4 in)
1969
116.3 mm (4.6 in)
1970
113.6 mm (4.5 in)
1971
83.9 mm (3.3 in)
1972
38.3 mm (1.5 in)
1973
74.5 mm (2.9 in)
1974
50.8 mm (2.0 in)
1975
45.0 mm (1.8 in)
1976
31.5 mm (1.2 in)
1977
85.9 mm (3.4 in)
1978
88.6 mm (3.5 in)
1979
92.7 mm (3.6 in)
1980
153.5 mm (6.0 in)
1981
88.9 mm (3.5 in)
1982
71.1 mm (2.8 in)
1983
98.3 mm (3.9 in)
1984
37.1 mm (1.5 in)
1985
51.8 mm (2.0 in)
1986
246.9 mm (9.7 in)
1987
36.1 mm (1.4 in)
1988
36.9 mm (1.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Mono Lake, 1944 to 1988. The record is 134 days in 1968, marked on the chart; the median year is 57 days.
Longest dry spell (CDD) at Mono Lake by year
Year
Longest dry spell (CDD)
1944
84 days
1950
19 days
1951
45 days
1952
54 days
1953
56 days
1954
120 days
1955
48 days
1956
48 days
1957
41 days
1958
40 days
1959
111 days
1960
42 days
1961
53 days
1962
65 days
1963
67 days
1964
83 days
1965
66 days
1966
75 days
1967
50 days
1968
134 days
1969
62 days
1970
56 days
1971
33 days
1972
58 days
1973
40 days
1974
81 days
1975
86 days
1976
91 days
1977
44 days
1978
71 days
1979
71 days
1980
47 days
1981
74 days
1982
36 days
1983
57 days
1984
55 days
1985
44 days
1986
70 days
1987
68 days
1988
42 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
37 years with a frost
Across 37 years with a frost, the median last spring frost at Mono Lake falls on 1 June and the median first autumn frost on 4 October, which leaves a median of 126 days between them.
Fitted over all years, the growing season changes by -8.7 days per decade at this station.
Frost dates and growing season at Mono Lake
Measure
Median, all years
Earliest period
Recent period (1958 to 1987)
Recent against earliest
Fitted trend
Last spring frost
1 June
n/a
1 June
n/a
+3.4 days per decade
First autumn frost
4 October
n/a
29 September
n/a
-5.3 days per decade
Growing days
126 days
n/a
122 days
n/a
-8.7 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
37 years, 1951 to 1987
A day with at least 38.7 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 178.7 mm (7.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Mono Lake: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
38.7 mm (1.5 in)
5 years
58.1 mm (2.3 in)
10 years
76.1 mm (3.0 in)
25 years
107.3 mm (4.2 in)
50 years
138.6 mm (5.5 in)
Longer than the 37 years of record
100 years
178.7 mm (7.0 in)
Longer than the 37 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, 37 years of values from 1951 to 1987.
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: 155.7 mm (6.1 in) in 1963; 142.5 mm (5.6 in) in 1955; 90.4 mm (3.6 in) in 1986.
Download the Data
Data for Mono Lake standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mono Lake 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.