Record envelope, standing records and threshold days for Rock Springs (USC00247136), Montana, United States, with 63 years of record.
Key Facts for Rock Springs
Rock Springs (USC00247136) is a weather station in Montana, United States at 46.82 latitude and -106.25 longitude, 922 m (3,024 ft) above sea level.
The station reports from 1951 to 2013, 63 years of record.
1,464 records set at Rock Springs still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Rock Springs set a daily record high maximum temperature of 31.1 C (88.0 F) on 21 September 2013.
About the Station
Location: Montana, United States, 46.82 latitude, -106.25 longitude.
Elevation: 922 m (3,024 ft).
Period of record: 1951 to 2013, 63 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 Rock Springs. 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 Rock Springs, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
20.0 C (68.0 F)
-40.0 C (-40.0 F)
n/a
n/a
Feb
22.2 C (72.0 F)
-37.8 C (-36.0 F)
n/a
n/a
Mar
28.3 C (82.9 F)
-33.3 C (-27.9 F)
n/a
n/a
Apr
31.7 C (89.1 F)
-20.6 C (-5.1 F)
n/a
n/a
May
37.8 C (100.0 F)
-11.1 C (12.0 F)
n/a
n/a
Jun
42.8 C (109.0 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
42.8 C (109.0 F)
1.7 C (35.1 F)
n/a
n/a
Aug
40.6 C (105.1 F)
-1.7 C (28.9 F)
n/a
n/a
Sep
38.3 C (100.9 F)
-11.1 C (12.0 F)
n/a
n/a
Oct
33.3 C (91.9 F)
-23.3 C (-9.9 F)
n/a
n/a
Nov
25.0 C (77.0 F)
-32.2 C (-26.0 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-40.0 C (-40.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Rock Springs still stand. 1985 holds the most, with 46.
Standing records at Rock Springs by the year they were set
Year set
Standing records
1951
12
1952
24
1953
20
1954
39
1955
31
1956
36
1957
18
1958
28
1959
29
1960
30
1961
20
1962
34
1963
33
1964
24
1965
33
1966
29
1967
19
1968
18
1969
29
1970
11
1971
19
1972
35
1973
16
1974
23
1975
10
1976
14
1977
19
1978
13
1979
23
1980
23
1981
22
1982
24
1983
24
1984
16
1985
46
1986
24
1987
26
1988
42
1989
25
1990
17
1991
21
1992
33
1993
28
1994
14
1995
28
1996
24
1997
24
1998
13
1999
24
2000
19
2001
18
2002
29
2003
27
2004
13
2005
39
2006
16
2007
11
2008
11
2009
46
2010
8
2011
13
2012
16
2013
11
All-Time Record Progression
5 new records
5 all-time records were set at Rock Springs between 5 June 1988 and 26 July 2009. Each dot is a new record.
When Rock Springs set new all-time records
Date
Kind
Detail
1988-06-05
Record high maximum temperature
Record high maximum temperature 41.7 C (107.1 F)
2002-07-14
Record high maximum temperature
Record high maximum temperature 42.8 C (109.0 F)
2004-01-03
Record daily snowfall
Record daily snowfall 27.9 cm (11.0 in)
2009-07-25
Record high minimum temperature
Record high minimum temperature 26.1 C (79.0 F)
2009-07-26
Record high minimum temperature
Record high minimum temperature 27.2 C (81.0 F)
Wettest Day of Each Month
Jun: 94.0 mm (3.7 in)
The wettest day on record for each calendar month at Rock Springs. The most was 94.0 mm (3.7 in) on 18 June 1964.
Record daily precipitation for each month at Rock Springs
Month
Record daily precipitation (mm)
Date
Jan
14.7 mm (0.6 in)
23 January 1954
Feb
21.3 mm (0.8 in)
18 February 1952
Mar
28.4 mm (1.1 in)
28 March 2007
Apr
38.6 mm (1.5 in)
22 April 2011
May
69.9 mm (2.8 in)
10 May 2011
Jun
94.0 mm (3.7 in)
18 June 1964
Jul
73.9 mm (2.9 in)
1 July 1997
Aug
31.2 mm (1.2 in)
12 August 1999
Sep
46.5 mm (1.8 in)
18 September 1978
Oct
36.6 mm (1.4 in)
22 October 1980
Nov
27.7 mm (1.1 in)
1 November 1974
Dec
27.9 mm (1.1 in)
23 December 1955
Period of Record Coverage
1951 to 2013
Complete yearUnder 90 percent of days
63 years of record at Rock Springs, 1951 to 2013. 14 years have data for under 90 percent of days and are left out of rankings: 1951, 1966, 1967, 1968, 1969, 1970, 1971, 1972 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 49 complete years at Rock Springs, 1952 to 2007. Blue stripes are years cooler than the station's own mean of 6.8 C (44.2 F); red stripes are warmer. The coolest year was 1978, at 4.3 C (39.8 F), and the warmest was 1987, at 8.5 C (47.3 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Rock Springs as warming stripes, 1952 to 2007
Year
Annual mean temperature
Difference from the station mean
1952
5.6 C
-1.20 C
1953
8.0 C
+1.25 C
1954
7.3 C
+0.49 C
1955
5.9 C
-0.85 C
1956
7.0 C
+0.23 C
1957
6.3 C
-0.51 C
1958
7.4 C
+0.67 C
1959
5.8 C
-0.98 C
1960
6.6 C
-0.14 C
1961
7.1 C
+0.38 C
1962
6.1 C
-0.67 C
1963
7.1 C
+0.31 C
1965
5.1 C
-1.64 C
1967
6.3 C
-0.51 C
1968
6.2 C
-0.59 C
1973
7.1 C
+0.30 C
1974
7.2 C
+0.40 C
1975
5.2 C
-1.60 C
1976
7.4 C
+0.60 C
1977
6.5 C
-0.22 C
1978
4.3 C
-2.44 C
1979
5.3 C
-1.50 C
1980
7.1 C
+0.33 C
1981
8.0 C
+1.25 C
1982
4.6 C
-2.12 C
1983
6.7 C
-0.07 C
1984
6.7 C
-0.02 C
1985
5.1 C
-1.64 C
1986
7.3 C
+0.51 C
1987
8.5 C
+1.76 C
1988
8.5 C
+1.69 C
1989
5.8 C
-0.94 C
1990
7.6 C
+0.79 C
1992
7.6 C
+0.86 C
1993
5.0 C
-1.72 C
1994
7.0 C
+0.24 C
1995
6.9 C
+0.11 C
1996
4.7 C
-2.08 C
1997
7.6 C
+0.80 C
1998
8.0 C
+1.25 C
1999
8.2 C
+1.45 C
2000
7.2 C
+0.46 C
2001
7.8 C
+1.05 C
2002
6.8 C
+0.05 C
2003
7.5 C
+0.75 C
2004
7.2 C
+0.44 C
2005
7.9 C
+1.14 C
2006
7.8 C
+1.02 C
2007
7.8 C
+1.02 C
The annual mean temperature here has risen by 0.18 C (0.01 to 0.36) per decade over 1952 to 2007. In Fahrenheit: 0.33 F (0.01 to 0.65) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Rock Springs
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.18 C (0.01 to 0.36) per decade
0.33 F (0.01 to 0.65) per decade
1952 to 2007
49
Rise
Mean daily maximum
0.1 C (-0.1 to 0.3) per decade
0.2 F (-0.2 to 0.6) per decade
1952 to 2007
49
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.4) per decade
0.4 F (0.1 to 0.7) per decade
1952 to 2007
49
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
1951 to 2013
Yearly extremes at Rock Springs: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.8 C (109.0 F)
2002
38.3 C (100.9 F)
63
Coldest night (TNn)
-40.0 C (-40.0 F)
1954
-33.3 C (-27.9 F)
63
Wettest day (Rx1day)
94.0 mm (3.7 in)
1964
30.5 mm (1.2 in)
63
Wettest five days (Rx5day)
170.2 mm (6.7 in)
2013
44.5 mm (1.8 in)
63
Longest dry spell (CDD)
90 days
2004
43 days
63
Hottest day (TXx)
The hottest day of the year at Rock Springs, 1951 to 2013. The record is 42.8 C (109.0 F) in 2002, marked on the chart; the median year is 38.3 C (100.9 F).
Hottest day (TXx) at Rock Springs by year
Year
Hottest day (TXx)
1951
30.0 C (86.0 F)
1952
38.3 C (100.9 F)
1953
38.3 C (100.9 F)
1954
39.4 C (102.9 F)
1955
38.9 C (102.0 F)
1956
38.9 C (102.0 F)
1957
37.8 C (100.0 F)
1958
38.9 C (102.0 F)
1959
40.6 C (105.1 F)
1960
41.1 C (106.0 F)
1961
38.9 C (102.0 F)
1962
37.2 C (99.0 F)
1963
37.8 C (100.0 F)
1964
39.4 C (102.9 F)
1965
39.4 C (102.9 F)
1966
39.4 C (102.9 F)
1967
36.7 C (98.1 F)
1968
36.7 C (98.1 F)
1969
38.3 C (100.9 F)
1970
38.9 C (102.0 F)
1971
39.4 C (102.9 F)
1972
37.2 C (99.0 F)
1973
36.7 C (98.1 F)
1974
37.8 C (100.0 F)
1975
40.0 C (104.0 F)
1976
40.6 C (105.1 F)
1977
37.8 C (100.0 F)
1978
37.2 C (99.0 F)
1979
37.8 C (100.0 F)
1980
39.4 C (102.9 F)
1981
37.8 C (100.0 F)
1982
36.1 C (97.0 F)
1983
40.6 C (105.1 F)
1984
40.0 C (104.0 F)
1985
39.4 C (102.9 F)
1986
36.7 C (98.1 F)
1987
36.7 C (98.1 F)
1988
41.7 C (107.1 F)
1989
38.9 C (102.0 F)
1990
38.3 C (100.9 F)
1991
37.2 C (99.0 F)
1992
36.7 C (98.1 F)
1993
33.3 C (91.9 F)
1994
36.7 C (98.1 F)
1995
40.6 C (105.1 F)
1996
37.2 C (99.0 F)
1997
37.2 C (99.0 F)
1998
38.3 C (100.9 F)
1999
41.1 C (106.0 F)
2000
38.9 C (102.0 F)
2001
40.6 C (105.1 F)
2002
42.8 C (109.0 F)
2003
40.6 C (105.1 F)
2004
38.3 C (100.9 F)
2005
40.6 C (105.1 F)
2006
38.9 C (102.0 F)
2007
41.7 C (107.1 F)
2008
38.3 C (100.9 F)
2009
39.4 C (102.9 F)
2010
37.2 C (99.0 F)
2011
37.2 C (99.0 F)
2012
42.8 C (109.0 F)
2013
37.2 C (99.0 F)
Coldest night (TNn)
The coldest night of the year at Rock Springs, 1951 to 2013. The record is -40.0 C (-40.0 F) in 1954, marked on the chart; the median year is -33.3 C (-27.9 F).
Coldest night (TNn) at Rock Springs by year
Year
Coldest night (TNn)
1951
-35.6 C (-32.1 F)
1952
-35.0 C (-31.0 F)
1953
-28.9 C (-20.0 F)
1954
-40.0 C (-40.0 F)
1955
-32.2 C (-26.0 F)
1956
-34.4 C (-29.9 F)
1957
-38.3 C (-36.9 F)
1958
-35.0 C (-31.0 F)
1959
-31.7 C (-25.1 F)
1960
-33.3 C (-27.9 F)
1961
-31.1 C (-24.0 F)
1962
-37.2 C (-35.0 F)
1963
-36.7 C (-34.1 F)
1964
-36.1 C (-33.0 F)
1965
-31.1 C (-24.0 F)
1966
-31.7 C (-25.1 F)
1967
-35.6 C (-32.1 F)
1968
-35.0 C (-31.0 F)
1969
-37.8 C (-36.0 F)
1970
-33.9 C (-29.0 F)
1971
-37.2 C (-35.0 F)
1972
-37.8 C (-36.0 F)
1973
-31.1 C (-24.0 F)
1974
-35.0 C (-31.0 F)
1975
-30.6 C (-23.1 F)
1976
-33.9 C (-29.0 F)
1977
-38.3 C (-36.9 F)
1978
-34.4 C (-29.9 F)
1979
-35.0 C (-31.0 F)
1980
-33.3 C (-27.9 F)
1981
-31.7 C (-25.1 F)
1982
-36.7 C (-34.1 F)
1983
-38.3 C (-36.9 F)
1984
-31.7 C (-25.1 F)
1985
-36.1 C (-33.0 F)
1986
-28.3 C (-18.9 F)
1987
-21.7 C (-7.1 F)
1988
-33.3 C (-27.9 F)
1989
-40.0 C (-40.0 F)
1990
-37.2 C (-35.0 F)
1991
-31.7 C (-25.1 F)
1992
-32.8 C (-27.0 F)
1993
-30.0 C (-22.0 F)
1994
-32.8 C (-27.0 F)
1995
-30.0 C (-22.0 F)
1996
-35.6 C (-32.1 F)
1997
-31.7 C (-25.1 F)
1998
-36.1 C (-33.0 F)
1999
-27.8 C (-18.0 F)
2000
-28.9 C (-20.0 F)
2001
-26.1 C (-15.0 F)
2002
-29.4 C (-20.9 F)
2003
-31.1 C (-24.0 F)
2004
-32.2 C (-26.0 F)
2005
-34.4 C (-29.9 F)
2006
-30.6 C (-23.1 F)
2007
-28.3 C (-18.9 F)
2008
-33.9 C (-29.0 F)
2009
-33.9 C (-29.0 F)
2010
-33.3 C (-27.9 F)
2011
-37.8 C (-36.0 F)
2012
-26.7 C (-16.1 F)
2013
-22.8 C (-9.0 F)
Wettest day (Rx1day)
The wettest day of the year at Rock Springs, 1951 to 2013. The record is 94.0 mm (3.7 in) in 1964, marked on the chart; the median year is 30.5 mm (1.2 in).
Wettest day (Rx1day) at Rock Springs by year
Year
Wettest day (Rx1day)
1951
19.6 mm (0.8 in)
1952
25.7 mm (1.0 in)
1953
27.9 mm (1.1 in)
1954
23.1 mm (0.9 in)
1955
27.9 mm (1.1 in)
1956
30.5 mm (1.2 in)
1957
27.2 mm (1.1 in)
1958
16.5 mm (0.6 in)
1959
17.8 mm (0.7 in)
1960
14.2 mm (0.6 in)
1961
38.6 mm (1.5 in)
1962
26.2 mm (1.0 in)
1963
32.0 mm (1.3 in)
1964
94.0 mm (3.7 in)
1965
31.8 mm (1.3 in)
1966
19.6 mm (0.8 in)
1967
38.9 mm (1.5 in)
1968
31.0 mm (1.2 in)
1969
27.7 mm (1.1 in)
1970
24.9 mm (1.0 in)
1971
34.0 mm (1.3 in)
1972
19.3 mm (0.8 in)
1973
48.8 mm (1.9 in)
1974
27.7 mm (1.1 in)
1975
61.0 mm (2.4 in)
1976
37.8 mm (1.5 in)
1977
30.5 mm (1.2 in)
1978
46.5 mm (1.8 in)
1979
14.5 mm (0.6 in)
1980
36.6 mm (1.4 in)
1981
26.4 mm (1.0 in)
1982
28.7 mm (1.1 in)
1983
19.3 mm (0.8 in)
1984
25.4 mm (1.0 in)
1985
33.0 mm (1.3 in)
1986
34.5 mm (1.4 in)
1987
49.8 mm (2.0 in)
1988
20.8 mm (0.8 in)
1989
30.5 mm (1.2 in)
1990
25.7 mm (1.0 in)
1991
36.6 mm (1.4 in)
1992
38.6 mm (1.5 in)
1993
33.3 mm (1.3 in)
1994
25.1 mm (1.0 in)
1995
19.3 mm (0.8 in)
1996
20.8 mm (0.8 in)
1997
73.9 mm (2.9 in)
1998
27.7 mm (1.1 in)
1999
31.2 mm (1.2 in)
2000
30.0 mm (1.2 in)
2001
39.6 mm (1.6 in)
2002
22.6 mm (0.9 in)
2003
23.9 mm (0.9 in)
2004
45.0 mm (1.8 in)
2005
31.8 mm (1.3 in)
2006
43.2 mm (1.7 in)
2007
35.6 mm (1.4 in)
2008
36.8 mm (1.4 in)
2009
3.6 mm (0.14 in)
2010
59.7 mm (2.4 in)
2011
69.9 mm (2.8 in)
2012
12.7 mm (0.5 in)
2013
69.6 mm (2.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Rock Springs, 1951 to 2013. The record is 170.2 mm (6.7 in) in 2013, marked on the chart; the median year is 44.5 mm (1.8 in).
Wettest five days (Rx5day) at Rock Springs by year
Year
Wettest five days (Rx5day)
1951
19.6 mm (0.8 in)
1952
29.3 mm (1.2 in)
1953
43.9 mm (1.7 in)
1954
37.3 mm (1.5 in)
1955
48.7 mm (1.9 in)
1956
44.2 mm (1.7 in)
1957
47.2 mm (1.9 in)
1958
25.5 mm (1.0 in)
1959
26.7 mm (1.1 in)
1960
22.6 mm (0.9 in)
1961
58.1 mm (2.3 in)
1962
37.6 mm (1.5 in)
1963
81.2 mm (3.2 in)
1964
106.7 mm (4.2 in)
1965
67.8 mm (2.7 in)
1966
35.1 mm (1.4 in)
1967
66.4 mm (2.6 in)
1968
41.7 mm (1.6 in)
1969
52.4 mm (2.1 in)
1970
35.8 mm (1.4 in)
1971
37.8 mm (1.5 in)
1972
33.5 mm (1.3 in)
1973
82.6 mm (3.3 in)
1974
55.4 mm (2.2 in)
1975
81.8 mm (3.2 in)
1976
67.1 mm (2.6 in)
1977
44.7 mm (1.8 in)
1978
82.5 mm (3.2 in)
1979
23.9 mm (0.9 in)
1980
67.6 mm (2.7 in)
1981
33.8 mm (1.3 in)
1982
36.5 mm (1.4 in)
1983
24.1 mm (0.9 in)
1984
35.9 mm (1.4 in)
1985
67.0 mm (2.6 in)
1986
61.2 mm (2.4 in)
1987
123.6 mm (4.9 in)
1988
21.3 mm (0.8 in)
1989
44.5 mm (1.8 in)
1990
39.1 mm (1.5 in)
1991
89.9 mm (3.5 in)
1992
46.4 mm (1.8 in)
1993
42.2 mm (1.7 in)
1994
37.3 mm (1.5 in)
1995
32.8 mm (1.3 in)
1996
47.1 mm (1.9 in)
1997
77.2 mm (3.0 in)
1998
29.8 mm (1.2 in)
1999
53.6 mm (2.1 in)
2000
30.0 mm (1.2 in)
2001
54.3 mm (2.1 in)
2002
38.1 mm (1.5 in)
2003
35.3 mm (1.4 in)
2004
75.8 mm (3.0 in)
2005
39.9 mm (1.6 in)
2006
45.7 mm (1.8 in)
2007
77.5 mm (3.1 in)
2008
51.1 mm (2.0 in)
2009
4.1 mm (0.16 in)
2010
89.2 mm (3.5 in)
2011
115.4 mm (4.5 in)
2012
19.2 mm (0.8 in)
2013
170.2 mm (6.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Rock Springs, 1951 to 2013. The record is 90 days in 2004, marked on the chart; the median year is 43 days.
Longest dry spell (CDD) at Rock Springs by year
Year
Longest dry spell (CDD)
1951
42 days
1952
37 days
1953
40 days
1954
33 days
1955
42 days
1956
68 days
1957
33 days
1958
41 days
1959
39 days
1960
71 days
1961
60 days
1962
31 days
1963
51 days
1964
52 days
1965
50 days
1966
39 days
1967
50 days
1968
44 days
1969
50 days
1970
38 days
1971
29 days
1972
26 days
1973
59 days
1974
39 days
1975
60 days
1976
36 days
1977
29 days
1978
34 days
1979
51 days
1980
76 days
1981
46 days
1982
35 days
1983
52 days
1984
88 days
1985
62 days
1986
31 days
1987
72 days
1988
54 days
1989
24 days
1990
48 days
1991
28 days
1992
51 days
1993
29 days
1994
40 days
1995
44 days
1996
36 days
1997
58 days
1998
50 days
1999
34 days
2000
40 days
2001
63 days
2002
88 days
2003
41 days
2004
90 days
2005
77 days
2006
46 days
2007
55 days
2008
55 days
2009
43 days
2010
23 days
2011
14 days
2012
32 days
2013
29 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
49 years with a frost
Across 49 years with a frost, the median last spring frost at Rock Springs falls on 20 May and the median first autumn frost on 19 September, which leaves a median of 123 days between them.
Fitted over all years, the growing season changes by +2.8 days per decade at this station.
Frost dates and growing season at Rock Springs
Measure
Median, all years
Earliest period
Recent period (1977 to 2007)
Recent against earliest
Fitted trend
Last spring frost
20 May
n/a
17 May
n/a
-0.5 days per decade
First autumn frost
19 September
n/a
20 September
n/a
+2.3 days per decade
Growing days
123 days
n/a
129 days
n/a
+2.8 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
54 years, 1952 to 2008
A day with at least 29.1 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 83.0 mm (3.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Rock Springs: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
29.1 mm (1.1 in)
5 years
40.2 mm (1.6 in)
10 years
48.7 mm (1.9 in)
25 years
61.0 mm (2.4 in)
50 years
71.4 mm (2.8 in)
100 years
83.0 mm (3.3 in)
Longer than the 54 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, 54 years of values from 1952 to 2008.
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: 94.0 mm (3.7 in) in 1964; 73.9 mm (2.9 in) in 1997; 61.0 mm (2.4 in) in 1975.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Rock Springs standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Rock Springs 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.