Record envelope, standing records and threshold days for Tonopah (USC00268160), Nevada, United States, with 125 years of record.
Key Facts for Tonopah
Tonopah (USC00268160) is a weather station in Nevada, United States at 38.07 latitude and -117.24 longitude, 1,832 m (6,010 ft) above sea level.
The station reports from 1902 to 2026, 125 years of record.
1,464 records set at Tonopah still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Tonopah set a daily record high minimum temperature of 21.7 C (71.1 F) on 8 August 2026.
About the Station
Location: Nevada, United States, 38.07 latitude, -117.24 longitude.
Elevation: 1,832 m (6,010 ft).
Period of record: 1902 to 2026, 125 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
28 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 Tonopah. The lines show the 2026 daily maximum and minimum. 28 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Tonopah, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.1 C (61.0 F)
-26.1 C (-15.0 F)
13.3 C (55.9 F)
-8.9 C (16.0 F)
Feb
20.0 C (68.0 F)
-21.7 C (-7.1 F)
18.3 C (64.9 F)
-8.3 C (17.1 F)
Mar
27.8 C (82.0 F)
-13.9 C (7.0 F)
27.8 C (82.0 F)
-4.4 C (24.1 F)
Apr
27.8 C (82.0 F)
-10.6 C (12.9 F)
21.7 C (71.1 F)
-5.6 C (21.9 F)
May
34.4 C (93.9 F)
-6.7 C (19.9 F)
30.0 C (86.0 F)
-0.6 C (30.9 F)
Jun
39.4 C (102.9 F)
-3.3 C (26.1 F)
35.6 C (96.1 F)
5.6 C (42.1 F)
Jul
39.4 C (102.9 F)
4.4 C (39.9 F)
35.6 C (96.1 F)
11.7 C (53.1 F)
Aug
37.8 C (100.0 F)
1.1 C (34.0 F)
36.1 C (97.0 F)
12.8 C (55.0 F)
Sep
37.2 C (99.0 F)
-5.0 C (23.0 F)
31.7 C (89.1 F)
7.8 C (46.0 F)
Oct
31.1 C (88.0 F)
-12.2 C (10.0 F)
n/a
n/a
Nov
23.3 C (73.9 F)
-16.7 C (1.9 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-21.7 C (-7.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Tonopah still stand. 1950 holds the most, with 80.
Standing records at Tonopah by the year they were set
Year set
Standing records
1902
58
1924
30
1925
23
1926
30
1927
47
1928
32
1929
30
1930
38
1931
40
1932
44
1933
43
1934
49
1935
29
1936
30
1937
44
1938
23
1939
28
1940
28
1941
23
1942
14
1943
16
1944
20
1945
18
1946
23
1947
30
1948
18
1949
60
1950
80
1951
36
1952
23
1953
37
1954
28
2011
1
2012
17
2013
24
2014
11
2015
29
2016
15
2017
26
2018
30
2019
26
2020
48
2021
54
2022
24
2023
21
2024
19
2025
17
2026
30
All-Time Record Progression
3 new records
3 all-time records were set at Tonopah between 19 October 2015 and 21 August 2023. Each dot is a new record.
When Tonopah set new all-time records
Date
Kind
Detail
2015-10-19
Record daily precipitation
Record daily precipitation 39.4 mm (1.6 in)
2017-06-21
Record high maximum temperature
Record high maximum temperature 39.4 C (102.9 F)
2023-08-21
Record daily precipitation
Record daily precipitation 65.3 mm (2.6 in)
Wettest Day of Each Month
Aug: 65.3 mm (2.6 in)
The wettest day on record for each calendar month at Tonopah. The most was 65.3 mm (2.6 in) on 21 August 2023.
Record daily precipitation for each month at Tonopah
Month
Record daily precipitation (mm)
Date
Jan
15.0 mm (0.6 in)
20 January 1929
Feb
18.5 mm (0.7 in)
18 February 2017
Mar
17.0 mm (0.7 in)
20 March 1946
Apr
21.6 mm (0.9 in)
25 April 1952
May
24.4 mm (1.0 in)
1 May 1938
Jun
26.9 mm (1.1 in)
2 June 1948
Jul
31.2 mm (1.2 in)
9 July 1950
Aug
65.3 mm (2.6 in)
21 August 2023
Sep
36.6 mm (1.4 in)
6 September 2025
Oct
39.4 mm (1.6 in)
19 October 2015
Nov
17.0 mm (0.7 in)
11 November 1946
Dec
19.8 mm (0.8 in)
25 December 2025
Period of Record Coverage
1902 to 2026
Complete yearUnder 90 percent of days
49 years of record at Tonopah, 1902 to 2026. 6 years have data for under 90 percent of days and are left out of rankings: 1902, 1906, 1924, 1954, 2011, 2026.
Cooler than the station meanWarmer than the station mean
One stripe for each of 42 complete years at Tonopah, 1925 to 2025. Blue stripes are years cooler than the station's own mean of 10.8 C (51.5 F); red stripes are warmer. The coolest year was 1949, at 9.5 C (49.1 F), and the warmest was 1934, at 12.7 C (54.8 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Tonopah as warming stripes, 1925 to 2025
Year
Annual mean temperature
Difference from the station mean
1925
10.7 C
-0.16 C
1926
11.5 C
+0.63 C
1927
10.4 C
-0.42 C
1928
10.8 C
-0.03 C
1929
10.6 C
-0.24 C
1930
10.3 C
-0.54 C
1931
11.1 C
+0.21 C
1932
10.3 C
-0.59 C
1933
10.6 C
-0.29 C
1934
12.7 C
+1.80 C
1935
10.5 C
-0.39 C
1936
11.5 C
+0.66 C
1937
10.3 C
-0.55 C
1938
10.4 C
-0.42 C
1939
11.3 C
+0.49 C
1940
11.9 C
+1.05 C
1941
10.1 C
-0.75 C
1942
10.8 C
-0.09 C
1943
11.1 C
+0.27 C
1944
9.6 C
-1.22 C
1945
10.0 C
-0.84 C
1946
10.0 C
-0.89 C
1947
10.8 C
-0.08 C
1948
9.7 C
-1.12 C
1949
9.5 C
-1.35 C
1950
9.9 C
-0.99 C
1952
10.2 C
-0.66 C
1953
11.2 C
+0.32 C
2012
11.9 C
+1.08 C
2013
10.7 C
-0.12 C
2014
12.0 C
+1.10 C
2015
11.3 C
+0.45 C
2016
11.0 C
+0.13 C
2017
11.2 C
+0.38 C
2018
11.6 C
+0.77 C
2019
10.1 C
-0.73 C
2020
11.9 C
+1.00 C
2021
11.6 C
+0.78 C
2022
11.0 C
+0.15 C
2023
10.4 C
-0.46 C
2024
11.5 C
+0.62 C
2025
11.7 C
+0.88 C
The annual mean temperature here has risen by 0.07 C (0.01 to 0.13) per decade over 1925 to 2025. In Fahrenheit: 0.12 F (0.02 to 0.23) per decade. The slope is a straight line fitted to 42 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Tonopah
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.07 C (0.01 to 0.13) per decade
0.12 F (0.02 to 0.23) per decade
1925 to 2025
42
Rise
Mean daily maximum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.2 to 0.5) per decade
1925 to 2025
42
Rise
Mean daily minimum
-0.07 C (-0.15 to 0.02) per decade
-0.12 F (-0.28 to 0.04) per decade
1925 to 2025
42
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
1902 to 2026
Yearly extremes at Tonopah: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
2017
35.6 C (96.1 F)
49
Coldest night (TNn)
-26.1 C (-15.0 F)
1937
-14.4 C (6.1 F)
49
Wettest day (Rx1day)
65.3 mm (2.6 in)
2023
17.8 mm (0.7 in)
49
Wettest five days (Rx5day)
77.8 mm (3.1 in)
2023
27.2 mm (1.1 in)
49
Longest dry spell (CDD)
135 days
1944
68 days
49
Hottest day (TXx)
The hottest day of the year at Tonopah, 1902 to 2026. The record is 39.4 C (102.9 F) in 2017, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Tonopah by year
Year
Hottest day (TXx)
1902
35.6 C (96.1 F)
1906
33.9 C (93.0 F)
1924
33.9 C (93.0 F)
1925
35.6 C (96.1 F)
1926
35.0 C (95.0 F)
1927
33.3 C (91.9 F)
1928
35.0 C (95.0 F)
1929
33.3 C (91.9 F)
1930
32.8 C (91.0 F)
1931
36.7 C (98.1 F)
1932
33.9 C (93.0 F)
1933
36.1 C (97.0 F)
1934
35.6 C (96.1 F)
1935
34.4 C (93.9 F)
1936
35.0 C (95.0 F)
1937
34.4 C (93.9 F)
1938
34.4 C (93.9 F)
1939
34.4 C (93.9 F)
1940
35.6 C (96.1 F)
1941
35.6 C (96.1 F)
1942
37.2 C (99.0 F)
1943
35.6 C (96.1 F)
1944
34.4 C (93.9 F)
1945
36.7 C (98.1 F)
1946
35.0 C (95.0 F)
1947
34.4 C (93.9 F)
1948
35.6 C (96.1 F)
1949
36.1 C (97.0 F)
1950
36.1 C (97.0 F)
1951
36.1 C (97.0 F)
1952
35.0 C (95.0 F)
1953
37.2 C (99.0 F)
1954
32.2 C (90.0 F)
2011
12.8 C (55.0 F)
2012
34.4 C (93.9 F)
2013
36.1 C (97.0 F)
2014
35.6 C (96.1 F)
2015
36.1 C (97.0 F)
2016
37.2 C (99.0 F)
2017
39.4 C (102.9 F)
2018
36.7 C (98.1 F)
2019
35.6 C (96.1 F)
2020
37.8 C (100.0 F)
2021
39.4 C (102.9 F)
2022
37.2 C (99.0 F)
2023
38.3 C (100.9 F)
2024
38.3 C (100.9 F)
2025
36.1 C (97.0 F)
2026
36.1 C (97.0 F)
Coldest night (TNn)
The coldest night of the year at Tonopah, 1902 to 2026. The record is -26.1 C (-15.0 F) in 1937, marked on the chart; the median year is -14.4 C (6.1 F).
Coldest night (TNn) at Tonopah by year
Year
Coldest night (TNn)
1902
-9.4 C (15.1 F)
1906
14.4 C (57.9 F)
1924
-20.0 C (-4.0 F)
1925
-11.1 C (12.0 F)
1926
-15.0 C (5.0 F)
1927
-12.2 C (10.0 F)
1928
-13.3 C (8.1 F)
1929
-18.3 C (-0.9 F)
1930
-15.6 C (3.9 F)
1931
-16.7 C (1.9 F)
1932
-21.7 C (-7.1 F)
1933
-21.7 C (-7.1 F)
1934
-10.0 C (14.0 F)
1935
-14.4 C (6.1 F)
1936
-12.2 C (10.0 F)
1937
-26.1 C (-15.0 F)
1938
-12.2 C (10.0 F)
1939
-14.4 C (6.1 F)
1940
-14.4 C (6.1 F)
1941
-12.2 C (10.0 F)
1942
-16.7 C (1.9 F)
1943
-16.7 C (1.9 F)
1944
-13.9 C (7.0 F)
1945
-12.8 C (9.0 F)
1946
-12.8 C (9.0 F)
1947
-13.9 C (7.0 F)
1948
-16.7 C (1.9 F)
1949
-21.1 C (-6.0 F)
1950
-18.9 C (-2.0 F)
1951
-18.3 C (-0.9 F)
1952
-16.7 C (1.9 F)
1953
-13.3 C (8.1 F)
1954
-12.2 C (10.0 F)
2011
-13.3 C (8.1 F)
2012
-13.3 C (8.1 F)
2013
-19.4 C (-2.9 F)
2014
-15.0 C (5.0 F)
2015
-15.0 C (5.0 F)
2016
-16.1 C (3.0 F)
2017
-14.4 C (6.1 F)
2018
-12.8 C (9.0 F)
2019
-15.6 C (3.9 F)
2020
-13.9 C (7.0 F)
2021
-18.9 C (-2.0 F)
2022
-13.3 C (8.1 F)
2023
-12.2 C (10.0 F)
2024
-11.7 C (10.9 F)
2025
-12.2 C (10.0 F)
2026
-8.9 C (16.0 F)
Wettest day (Rx1day)
The wettest day of the year at Tonopah, 1902 to 2026. The record is 65.3 mm (2.6 in) in 2023, marked on the chart; the median year is 17.8 mm (0.7 in).
Wettest day (Rx1day) at Tonopah by year
Year
Wettest day (Rx1day)
1902
7.6 mm (0.30 in)
1906
3.6 mm (0.14 in)
1924
19.3 mm (0.8 in)
1925
19.3 mm (0.8 in)
1926
5.1 mm (0.20 in)
1927
19.3 mm (0.8 in)
1928
13.7 mm (0.5 in)
1929
34.5 mm (1.4 in)
1930
14.7 mm (0.6 in)
1931
23.6 mm (0.9 in)
1932
13.7 mm (0.5 in)
1933
11.7 mm (0.5 in)
1934
29.0 mm (1.1 in)
1935
16.0 mm (0.6 in)
1936
16.3 mm (0.6 in)
1937
28.7 mm (1.1 in)
1938
24.4 mm (1.0 in)
1939
16.3 mm (0.6 in)
1940
19.1 mm (0.8 in)
1941
17.8 mm (0.7 in)
1942
10.9 mm (0.4 in)
1943
16.8 mm (0.7 in)
1944
15.0 mm (0.6 in)
1945
31.0 mm (1.2 in)
1946
17.0 mm (0.7 in)
1947
12.7 mm (0.5 in)
1948
26.9 mm (1.1 in)
1949
22.4 mm (0.9 in)
1950
31.2 mm (1.2 in)
1951
13.7 mm (0.5 in)
1952
21.6 mm (0.9 in)
1953
8.9 mm (0.35 in)
1954
8.6 mm (0.34 in)
2011
0.0 mm (0.00 in)
2012
20.6 mm (0.8 in)
2013
21.3 mm (0.8 in)
2014
23.9 mm (0.9 in)
2015
39.4 mm (1.6 in)
2016
16.0 mm (0.6 in)
2017
18.5 mm (0.7 in)
2018
17.0 mm (0.7 in)
2019
17.0 mm (0.7 in)
2020
18.5 mm (0.7 in)
2021
18.8 mm (0.7 in)
2022
17.0 mm (0.7 in)
2023
65.3 mm (2.6 in)
2024
19.6 mm (0.8 in)
2025
36.6 mm (1.4 in)
2026
8.9 mm (0.35 in)
Wettest five days (Rx5day)
The wettest five days of the year at Tonopah, 1902 to 2026. The record is 77.8 mm (3.1 in) in 2023, marked on the chart; the median year is 27.2 mm (1.1 in).
Wettest five days (Rx5day) at Tonopah by year
Year
Wettest five days (Rx5day)
1902
10.1 mm (0.4 in)
1906
6.2 mm (0.24 in)
1924
43.7 mm (1.7 in)
1925
20.4 mm (0.8 in)
1926
8.9 mm (0.35 in)
1927
22.6 mm (0.9 in)
1928
14.0 mm (0.6 in)
1929
34.5 mm (1.4 in)
1930
20.9 mm (0.8 in)
1931
40.1 mm (1.6 in)
1932
18.8 mm (0.7 in)
1933
22.6 mm (0.9 in)
1934
31.0 mm (1.2 in)
1935
22.6 mm (0.9 in)
1936
25.4 mm (1.0 in)
1937
35.1 mm (1.4 in)
1938
28.2 mm (1.1 in)
1939
36.1 mm (1.4 in)
1940
27.7 mm (1.1 in)
1941
23.9 mm (0.9 in)
1942
11.7 mm (0.5 in)
1943
34.6 mm (1.4 in)
1944
27.2 mm (1.1 in)
1945
32.3 mm (1.3 in)
1946
47.5 mm (1.9 in)
1947
21.6 mm (0.9 in)
1948
36.6 mm (1.4 in)
1949
40.7 mm (1.6 in)
1950
39.7 mm (1.6 in)
1951
15.7 mm (0.6 in)
1952
50.6 mm (2.0 in)
1953
12.4 mm (0.5 in)
1954
20.5 mm (0.8 in)
2011
0.0 mm (0.00 in)
2012
35.8 mm (1.4 in)
2013
31.3 mm (1.2 in)
2014
42.8 mm (1.7 in)
2015
49.8 mm (2.0 in)
2016
17.8 mm (0.7 in)
2017
22.8 mm (0.9 in)
2018
31.8 mm (1.3 in)
2019
35.4 mm (1.4 in)
2020
19.0 mm (0.7 in)
2021
18.8 mm (0.7 in)
2022
36.6 mm (1.4 in)
2023
77.8 mm (3.1 in)
2024
19.6 mm (0.8 in)
2025
36.6 mm (1.4 in)
2026
15.0 mm (0.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Tonopah, 1902 to 2026. The record is 135 days in 1944, marked on the chart; the median year is 68 days.
Longest dry spell (CDD) at Tonopah by year
Year
Longest dry spell (CDD)
1902
61 days
1906
5 days
1924
59 days
1925
53 days
1926
103 days
1927
116 days
1928
68 days
1929
100 days
1930
44 days
1931
54 days
1932
83 days
1933
124 days
1934
101 days
1935
89 days
1936
64 days
1937
114 days
1938
63 days
1939
60 days
1940
126 days
1941
63 days
1942
98 days
1943
117 days
1944
135 days
1945
49 days
1946
56 days
1947
70 days
1948
108 days
1949
55 days
1950
89 days
1951
87 days
1952
58 days
1953
66 days
1954
41 days
2011
18 days
2012
57 days
2013
57 days
2014
44 days
2015
67 days
2016
73 days
2017
100 days
2018
53 days
2019
57 days
2020
109 days
2021
81 days
2022
134 days
2023
52 days
2024
81 days
2025
110 days
2026
76 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
42 years with a frost
Across 42 years with a frost, the median last spring frost at Tonopah falls on 18 May and the median first autumn frost on 15 October, which leaves a median of 153 days between them.
Fitted over all years, the growing season changes by +1.3 days per decade at this station.
Frost dates and growing season at Tonopah
Measure
Median, all years
Earliest period
Recent period (1937 to 2025)
Recent against earliest
Fitted trend
Last spring frost
18 May
n/a
18 May
n/a
-0.9 days per decade
First autumn frost
15 October
n/a
13 October
n/a
+0.4 days per decade
Growing days
153 days
n/a
153 days
n/a
+1.3 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
43 years, 1925 to 2025
A day with at least 18.5 mm (0.7 in) of rain is expected about once in 2 years. A day with at least 58.6 mm (2.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Tonopah: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
18.5 mm (0.7 in)
5 years
26.3 mm (1.0 in)
10 years
32.4 mm (1.3 in)
25 years
41.6 mm (1.6 in)
50 years
49.5 mm (1.9 in)
Longer than the 43 years of record
100 years
58.6 mm (2.3 in)
Longer than the 43 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, 43 years of values from 1925 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: 65.3 mm (2.6 in) in 2023; 39.4 mm (1.6 in) in 2015; 36.6 mm (1.4 in) in 2025.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Tonopah, at 2014. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 2014 ran 0.8 C (1.5 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Tonopah, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
2014
-0.8
-1.5
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Tonopah standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tonopah 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.