Record envelope, standing records and threshold days for Twin Falls 6 E (USC00109303), Idaho, United States, with 50 years of record.
Key Facts for Twin Falls 6 E
Twin Falls 6 E (USC00109303) is a weather station in Idaho, United States at 42.55 latitude and -114.35 longitude, 1,207 m (3,960 ft) above sea level.
The station reports from 1963 to 2012, 50 years of record.
1,464 records set at Twin Falls 6 E still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Twin Falls 6 E tied a daily record high maximum temperature of 21.1 C (70.0 F) on 31 October 2012.
About the Station
Location: Idaho, United States, 42.55 latitude, -114.35 longitude.
Elevation: 1,207 m (3,960 ft).
Period of record: 1963 to 2012, 50 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 Twin Falls 6 E. 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 Twin Falls 6 E, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
14.4 C (57.9 F)
-25.6 C (-14.1 F)
n/a
n/a
Feb
20.0 C (68.0 F)
-27.2 C (-17.0 F)
n/a
n/a
Mar
26.1 C (79.0 F)
-16.1 C (3.0 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-10.0 C (14.0 F)
n/a
n/a
May
37.8 C (100.0 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
37.8 C (100.0 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
0.6 C (33.1 F)
n/a
n/a
Aug
37.8 C (100.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
35.6 C (96.1 F)
-4.4 C (24.1 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-12.8 C (9.0 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-20.0 C (-4.0 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-30.6 C (-23.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Twin Falls 6 E still stand. 1985 holds the most, with 57.
Standing records at Twin Falls 6 E by the year they were set
Year set
Standing records
1963
20
1964
40
1965
42
1966
31
1967
21
1968
26
1969
31
1970
36
1971
29
1972
34
1973
25
1974
43
1975
41
1976
30
1977
37
1978
27
1979
33
1980
34
1981
18
1982
31
1983
24
1984
38
1985
57
1986
40
1987
31
1988
31
1989
26
1990
38
1991
25
1992
32
1993
47
1994
15
1995
35
1996
31
1997
19
1998
22
1999
27
2000
29
2001
26
2002
30
2003
42
2004
18
2005
9
2006
28
2007
18
2008
29
2009
27
2010
15
2011
9
2012
17
All-Time Record Progression
4 new records
4 all-time records were set at Twin Falls 6 E between 13 July 2002 and 24 July 2006. Each dot is a new record.
When Twin Falls 6 E set new all-time records
Date
Kind
Detail
2002-07-13
Record high maximum temperature
Record high maximum temperature 40.0 C (104.0 F)
2004-02-07
Record daily snowfall
Record daily snowfall 40.6 cm (16.0 in)
2004-02-07
Record snow depth
Record snow depth 40.6 cm (16.0 in)
2006-07-24
Record high minimum temperature
Record high minimum temperature 21.7 C (71.1 F)
Wettest Day of Each Month
Feb: 40.6 mm (1.6 in)
The wettest day on record for each calendar month at Twin Falls 6 E. The most was 40.6 mm (1.6 in) on 18 February 1986.
Record daily precipitation for each month at Twin Falls 6 E
Month
Record daily precipitation (mm)
Date
Jan
27.4 mm (1.1 in)
11 January 1979
Feb
40.6 mm (1.6 in)
18 February 1986
Mar
35.8 mm (1.4 in)
22 March 1973
Apr
33.0 mm (1.3 in)
20 April 1981
May
39.4 mm (1.6 in)
7 May 1995
Jun
31.0 mm (1.2 in)
20 June 2009
Jul
16.0 mm (0.6 in)
20 July 2004
Aug
32.3 mm (1.3 in)
20 August 1968
Sep
30.2 mm (1.2 in)
6 September 1978
Oct
24.6 mm (1.0 in)
25 October 2010
Nov
25.7 mm (1.0 in)
18 November 1983
Dec
31.8 mm (1.3 in)
9 December 2004
Period of Record Coverage
1963 to 2012
Complete yearUnder 90 percent of days
50 years of record at Twin Falls 6 E, 1963 to 2012. 2 years have data for under 90 percent of days and are left out of rankings: 1963, 2012.
Cooler than the station meanWarmer than the station mean
One stripe for each of 43 complete years at Twin Falls 6 E, 1964 to 2011. Blue stripes are years cooler than the station's own mean of 8.8 C (47.8 F); red stripes are warmer. The coolest year was 1993, at 7.0 C (44.6 F), and the warmest was 2003, at 10.2 C (50.3 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Twin Falls 6 E as warming stripes, 1964 to 2011
Year
Annual mean temperature
Difference from the station mean
1964
7.8 C
-0.95 C
1965
8.7 C
-0.07 C
1966
9.2 C
+0.42 C
1967
9.3 C
+0.48 C
1968
8.6 C
-0.19 C
1969
9.1 C
+0.31 C
1970
8.7 C
-0.12 C
1971
8.2 C
-0.55 C
1972
8.2 C
-0.59 C
1973
8.7 C
-0.03 C
1974
8.7 C
-0.04 C
1975
7.9 C
-0.83 C
1976
8.2 C
-0.59 C
1977
8.8 C
+0.06 C
1978
8.5 C
-0.27 C
1979
8.4 C
-0.35 C
1980
8.8 C
+0.05 C
1981
9.4 C
+0.59 C
1982
7.6 C
-1.20 C
1983
8.8 C
-0.01 C
1984
7.4 C
-1.40 C
1986
9.2 C
+0.46 C
1988
9.2 C
+0.44 C
1989
8.5 C
-0.25 C
1990
8.9 C
+0.11 C
1991
8.8 C
+0.00 C
1992
9.6 C
+0.84 C
1993
7.0 C
-1.76 C
1994
9.0 C
+0.21 C
1995
9.1 C
+0.34 C
1996
9.0 C
+0.18 C
1997
9.0 C
+0.18 C
1998
9.5 C
+0.72 C
2000
9.4 C
+0.61 C
2001
9.3 C
+0.52 C
2003
10.2 C
+1.40 C
2004
9.1 C
+0.28 C
2006
9.5 C
+0.70 C
2007
9.6 C
+0.80 C
2008
8.3 C
-0.44 C
2009
8.4 C
-0.34 C
2010
9.1 C
+0.36 C
2011
8.6 C
-0.19 C
The annual mean temperature here has risen by 0.14 C (0.01 to 0.27) per decade over 1964 to 2011. In Fahrenheit: 0.25 F (0.01 to 0.49) per decade. The slope is a straight line fitted to 43 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Twin Falls 6 E
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.14 C (0.01 to 0.27) per decade
0.25 F (0.01 to 0.49) per decade
1964 to 2011
43
Rise
Mean daily maximum
0.15 C (-0.02 to 0.32) per decade
0.27 F (-0.03 to 0.57) per decade
1964 to 2011
43
Not clearly different from zero
Mean daily minimum
0.13 C (0.02 to 0.24) per decade
0.23 F (0.03 to 0.44) per decade
1964 to 2011
43
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
1963 to 2012
Yearly extremes at Twin Falls 6 E: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
2002
36.1 C (97.0 F)
50
Coldest night (TNn)
-30.6 C (-23.1 F)
1990
-19.4 C (-2.9 F)
50
Wettest day (Rx1day)
40.6 mm (1.6 in)
1986
22.4 mm (0.9 in)
50
Wettest five days (Rx5day)
74.0 mm (2.9 in)
1968
35.1 mm (1.4 in)
50
Longest dry spell (CDD)
107 days
1981
49 days
50
Hottest day (TXx)
The hottest day of the year at Twin Falls 6 E, 1963 to 2012. The record is 40.0 C (104.0 F) in 2002, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Twin Falls 6 E by year
Year
Hottest day (TXx)
1963
33.9 C (93.0 F)
1964
36.1 C (97.0 F)
1965
34.4 C (93.9 F)
1966
34.4 C (93.9 F)
1967
35.6 C (96.1 F)
1968
35.6 C (96.1 F)
1969
35.6 C (96.1 F)
1970
36.1 C (97.0 F)
1971
36.1 C (97.0 F)
1972
36.7 C (98.1 F)
1973
38.3 C (100.9 F)
1974
37.8 C (100.0 F)
1975
35.0 C (95.0 F)
1976
35.6 C (96.1 F)
1977
35.0 C (95.0 F)
1978
34.4 C (93.9 F)
1979
36.1 C (97.0 F)
1980
36.1 C (97.0 F)
1981
36.1 C (97.0 F)
1982
33.9 C (93.0 F)
1983
36.1 C (97.0 F)
1984
35.6 C (96.1 F)
1985
35.6 C (96.1 F)
1986
35.6 C (96.1 F)
1987
36.1 C (97.0 F)
1988
36.1 C (97.0 F)
1989
35.6 C (96.1 F)
1990
36.7 C (98.1 F)
1991
35.0 C (95.0 F)
1992
35.6 C (96.1 F)
1993
32.8 C (91.0 F)
1994
36.1 C (97.0 F)
1995
35.0 C (95.0 F)
1996
36.1 C (97.0 F)
1997
36.1 C (97.0 F)
1998
37.2 C (99.0 F)
1999
36.1 C (97.0 F)
2000
37.2 C (99.0 F)
2001
37.8 C (100.0 F)
2002
40.0 C (104.0 F)
2003
39.4 C (102.9 F)
2004
36.1 C (97.0 F)
2005
36.1 C (97.0 F)
2006
38.9 C (102.0 F)
2007
37.2 C (99.0 F)
2008
35.6 C (96.1 F)
2009
36.1 C (97.0 F)
2010
36.7 C (98.1 F)
2011
35.0 C (95.0 F)
2012
37.2 C (99.0 F)
Coldest night (TNn)
The coldest night of the year at Twin Falls 6 E, 1963 to 2012. The record is -30.6 C (-23.1 F) in 1990, marked on the chart; the median year is -19.4 C (-2.9 F).
Coldest night (TNn) at Twin Falls 6 E by year
Year
Coldest night (TNn)
1963
-13.3 C (8.1 F)
1964
-19.4 C (-2.9 F)
1965
-15.0 C (5.0 F)
1966
-17.2 C (1.0 F)
1967
-19.4 C (-2.9 F)
1968
-20.6 C (-5.1 F)
1969
-15.0 C (5.0 F)
1970
-17.2 C (1.0 F)
1971
-18.3 C (-0.9 F)
1972
-28.3 C (-18.9 F)
1973
-17.2 C (1.0 F)
1974
-23.9 C (-11.0 F)
1975
-20.0 C (-4.0 F)
1976
-20.0 C (-4.0 F)
1977
-21.7 C (-7.1 F)
1978
-22.8 C (-9.0 F)
1979
-25.0 C (-13.0 F)
1980
-22.8 C (-9.0 F)
1981
-15.0 C (5.0 F)
1982
-25.6 C (-14.1 F)
1983
-23.3 C (-9.9 F)
1984
-25.6 C (-14.1 F)
1985
-26.1 C (-15.0 F)
1986
-15.6 C (3.9 F)
1987
-22.8 C (-9.0 F)
1988
-20.0 C (-4.0 F)
1989
-23.9 C (-11.0 F)
1990
-30.6 C (-23.1 F)
1991
-20.0 C (-4.0 F)
1992
-19.4 C (-2.9 F)
1993
-19.4 C (-2.9 F)
1994
-17.8 C (0.0 F)
1995
-15.6 C (3.9 F)
1996
-27.2 C (-17.0 F)
1997
-15.0 C (5.0 F)
1998
-21.7 C (-7.1 F)
1999
-16.7 C (1.9 F)
2000
-13.9 C (7.0 F)
2001
-15.6 C (3.9 F)
2002
-15.0 C (5.0 F)
2003
-16.1 C (3.0 F)
2004
-17.8 C (0.0 F)
2005
-18.3 C (-0.9 F)
2006
-16.7 C (1.9 F)
2007
-16.7 C (1.9 F)
2008
-21.7 C (-7.1 F)
2009
-25.6 C (-14.1 F)
2010
-16.1 C (3.0 F)
2011
-16.1 C (3.0 F)
2012
-13.3 C (8.1 F)
Wettest day (Rx1day)
The wettest day of the year at Twin Falls 6 E, 1963 to 2012. The record is 40.6 mm (1.6 in) in 1986, marked on the chart; the median year is 22.4 mm (0.9 in).
Wettest day (Rx1day) at Twin Falls 6 E by year
Year
Wettest day (Rx1day)
1963
19.8 mm (0.8 in)
1964
29.0 mm (1.1 in)
1965
15.2 mm (0.6 in)
1966
8.9 mm (0.35 in)
1967
20.6 mm (0.8 in)
1968
32.3 mm (1.3 in)
1969
16.0 mm (0.6 in)
1970
23.6 mm (0.9 in)
1971
20.3 mm (0.8 in)
1972
20.8 mm (0.8 in)
1973
35.8 mm (1.4 in)
1974
16.0 mm (0.6 in)
1975
21.8 mm (0.9 in)
1976
24.1 mm (0.9 in)
1977
24.1 mm (0.9 in)
1978
30.2 mm (1.2 in)
1979
27.4 mm (1.1 in)
1980
21.8 mm (0.9 in)
1981
33.0 mm (1.3 in)
1982
21.6 mm (0.9 in)
1983
25.7 mm (1.0 in)
1984
11.2 mm (0.4 in)
1985
13.7 mm (0.5 in)
1986
40.6 mm (1.6 in)
1987
10.7 mm (0.4 in)
1988
17.0 mm (0.7 in)
1989
15.2 mm (0.6 in)
1990
26.4 mm (1.0 in)
1991
28.4 mm (1.1 in)
1992
15.0 mm (0.6 in)
1993
23.1 mm (0.9 in)
1994
18.8 mm (0.7 in)
1995
39.4 mm (1.6 in)
1996
24.4 mm (1.0 in)
1997
18.0 mm (0.7 in)
1998
17.8 mm (0.7 in)
1999
22.9 mm (0.9 in)
2000
17.3 mm (0.7 in)
2001
25.4 mm (1.0 in)
2002
15.0 mm (0.6 in)
2003
30.2 mm (1.2 in)
2004
31.8 mm (1.3 in)
2005
30.5 mm (1.2 in)
2006
25.1 mm (1.0 in)
2007
23.6 mm (0.9 in)
2008
18.3 mm (0.7 in)
2009
31.0 mm (1.2 in)
2010
24.6 mm (1.0 in)
2011
12.2 mm (0.5 in)
2012
21.3 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Twin Falls 6 E, 1963 to 2012. The record is 74.0 mm (2.9 in) in 1968, marked on the chart; the median year is 35.1 mm (1.4 in).
Wettest five days (Rx5day) at Twin Falls 6 E by year
Year
Wettest five days (Rx5day)
1963
23.1 mm (0.9 in)
1964
61.7 mm (2.4 in)
1965
23.8 mm (0.9 in)
1966
16.0 mm (0.6 in)
1967
23.6 mm (0.9 in)
1968
74.0 mm (2.9 in)
1969
17.8 mm (0.7 in)
1970
35.3 mm (1.4 in)
1971
47.5 mm (1.9 in)
1972
51.5 mm (2.0 in)
1973
40.4 mm (1.6 in)
1974
21.6 mm (0.9 in)
1975
36.6 mm (1.4 in)
1976
28.9 mm (1.1 in)
1977
44.0 mm (1.7 in)
1978
37.6 mm (1.5 in)
1979
45.2 mm (1.8 in)
1980
44.2 mm (1.7 in)
1981
37.9 mm (1.5 in)
1982
32.3 mm (1.3 in)
1983
37.7 mm (1.5 in)
1984
33.6 mm (1.3 in)
1985
18.7 mm (0.7 in)
1986
60.7 mm (2.4 in)
1987
28.5 mm (1.1 in)
1988
32.7 mm (1.3 in)
1989
29.2 mm (1.1 in)
1990
43.0 mm (1.7 in)
1991
32.0 mm (1.3 in)
1992
17.8 mm (0.7 in)
1993
57.9 mm (2.3 in)
1994
29.0 mm (1.1 in)
1995
62.5 mm (2.5 in)
1996
44.8 mm (1.8 in)
1997
29.2 mm (1.1 in)
1998
62.3 mm (2.5 in)
1999
40.7 mm (1.6 in)
2000
24.7 mm (1.0 in)
2001
34.0 mm (1.3 in)
2002
28.0 mm (1.1 in)
2003
31.5 mm (1.2 in)
2004
38.4 mm (1.5 in)
2005
53.1 mm (2.1 in)
2006
47.3 mm (1.9 in)
2007
30.0 mm (1.2 in)
2008
34.8 mm (1.4 in)
2009
38.4 mm (1.5 in)
2010
26.9 mm (1.1 in)
2011
25.0 mm (1.0 in)
2012
54.8 mm (2.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Twin Falls 6 E, 1963 to 2012. The record is 107 days in 1981, marked on the chart; the median year is 49 days.
Longest dry spell (CDD) at Twin Falls 6 E by year
Year
Longest dry spell (CDD)
1963
35 days
1964
38 days
1965
56 days
1966
78 days
1967
54 days
1968
65 days
1969
65 days
1970
32 days
1971
39 days
1972
57 days
1973
29 days
1974
57 days
1975
43 days
1976
46 days
1977
52 days
1978
50 days
1979
61 days
1980
55 days
1981
107 days
1982
25 days
1983
34 days
1984
29 days
1985
39 days
1986
38 days
1987
79 days
1988
77 days
1989
37 days
1990
64 days
1991
57 days
1992
54 days
1993
47 days
1994
46 days
1995
42 days
1996
48 days
1997
26 days
1998
29 days
1999
75 days
2000
106 days
2001
30 days
2002
31 days
2003
67 days
2004
49 days
2005
39 days
2006
74 days
2007
49 days
2008
72 days
2009
49 days
2010
49 days
2011
42 days
2012
50 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
43 years with a frost
Across 43 years with a frost, the median last spring frost at Twin Falls 6 E falls on 10 May and the median first autumn frost on 27 September, which leaves a median of 137 days between them.
Fitted over all years, the growing season changes by -0.7 days per decade at this station.
Frost dates and growing season at Twin Falls 6 E
Measure
Median, all years
Earliest period
Recent period (1977 to 2011)
Recent against earliest
Fitted trend
Last spring frost
10 May
n/a
10 May
n/a
+0.8 days per decade
First autumn frost
27 September
n/a
24 September
n/a
+0.1 days per decade
Growing days
137 days
n/a
137 days
n/a
-0.7 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
48 years, 1964 to 2011
A day with at least 22.3 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 42.0 mm (1.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Twin Falls 6 E: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
22.3 mm (0.9 in)
5 years
29.1 mm (1.1 in)
10 years
32.9 mm (1.3 in)
25 years
37.0 mm (1.5 in)
50 years
39.6 mm (1.6 in)
Longer than the 48 years of record
100 years
42.0 mm (1.7 in)
Longer than the 48 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, 48 years of values from 1964 to 2011.
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: 40.6 mm (1.6 in) in 1986; 39.4 mm (1.6 in) in 1995; 35.8 mm (1.4 in) in 1973.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Twin Falls 6 E standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Twin Falls 6 E 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.