Record envelope, standing records and threshold days for Bluffton 6N (USC00120830), Indiana, United States, with 53 years of record.
Key Facts for Bluffton 6N
Bluffton 6N (USC00120830) is a weather station in Indiana, United States at 40.81 latitude and -85.15 longitude, 262 m (861 ft) above sea level.
The station reports from 1971 to 2023, 53 years of record.
1,464 records set at Bluffton 6N still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Bluffton 6N tied a daily record high maximum temperature of 32.2 C (90.0 F) on 3 June 2023.
About the Station
Location: Indiana, United States, 40.81 latitude, -85.15 longitude.
Elevation: 262 m (861 ft).
Period of record: 1971 to 2023, 53 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 Bluffton 6N. 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 Bluffton 6N, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
19.4 C (66.9 F)
-31.1 C (-24.0 F)
n/a
n/a
Feb
23.3 C (73.9 F)
-27.8 C (-18.0 F)
n/a
n/a
Mar
30.0 C (86.0 F)
-21.7 C (-7.1 F)
n/a
n/a
Apr
30.6 C (87.1 F)
-13.3 C (8.1 F)
n/a
n/a
May
35.0 C (95.0 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
37.8 C (100.0 F)
2.8 C (37.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
5.0 C (41.0 F)
n/a
n/a
Aug
37.2 C (99.0 F)
4.4 C (39.9 F)
n/a
n/a
Sep
36.1 C (97.0 F)
-2.8 C (27.0 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-12.2 C (10.0 F)
n/a
n/a
Nov
26.1 C (79.0 F)
-15.0 C (5.0 F)
n/a
n/a
Dec
21.1 C (70.0 F)
-27.8 C (-18.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Bluffton 6N still stand. 1989 holds the most, with 65.
Standing records at Bluffton 6N by the year they were set
Year set
Standing records
1971
29
1972
30
1973
26
1974
26
1975
27
1976
35
1977
44
1978
23
1979
35
1980
26
1981
18
1982
30
1983
45
1984
38
1985
31
1986
37
1987
29
1988
61
1989
65
1990
34
1991
51
1992
20
1993
20
1994
26
1995
27
1996
32
1997
23
1998
27
1999
32
2000
26
2001
28
2002
32
2003
17
2004
22
2005
22
2006
21
2007
32
2008
25
2009
12
2010
24
2011
27
2012
32
2013
22
2014
42
2015
34
2016
21
2017
33
2018
27
2019
16
2020
1
2021
1
All-Time Record Progression
1 new records
1 all-time records were set at Bluffton 6N between 22 July 2011 and 22 July 2011. Each dot is a new record.
When Bluffton 6N set new all-time records
Date
Kind
Detail
2011-07-22
Record high minimum temperature
Record high minimum temperature 26.1 C (79.0 F)
Wettest Day of Each Month
Jul: 136.4 mm (5.4 in)
The wettest day on record for each calendar month at Bluffton 6N. The most was 136.4 mm (5.4 in) on 22 July 1998.
Record daily precipitation for each month at Bluffton 6N
Month
Record daily precipitation (mm)
Date
Jan
53.1 mm (2.1 in)
13 January 2013
Feb
44.5 mm (1.8 in)
27 February 1997
Mar
43.2 mm (1.7 in)
9 March 2009
Apr
70.1 mm (2.8 in)
6 April 2009
May
95.8 mm (3.8 in)
26 May 1989
Jun
114.8 mm (4.5 in)
14 June 1981
Jul
136.4 mm (5.4 in)
22 July 1998
Aug
101.6 mm (4.0 in)
18 August 1990
Sep
68.1 mm (2.7 in)
26 September 1971
Oct
74.2 mm (2.9 in)
26 October 1991
Nov
45.7 mm (1.8 in)
24 November 2014
Dec
66.5 mm (2.6 in)
30 December 1990
Period of Record Coverage
1971 to 2023
Complete yearUnder 90 percent of days
53 years of record at Bluffton 6N, 1971 to 2023. 8 years have data for under 90 percent of days and are left out of rankings: 1971, 1987, 2012, 2019, 2020, 2021, 2022, 2023.
Cooler than the station meanWarmer than the station mean
One stripe for each of 41 complete years at Bluffton 6N, 1972 to 2018. Blue stripes are years cooler than the station's own mean of 10.0 C (49.9 F); red stripes are warmer. The coolest year was 1988, at 7.5 C (45.5 F), and the warmest was 1998, at 12.2 C (54.0 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Bluffton 6N as warming stripes, 1972 to 2018
Year
Annual mean temperature
Difference from the station mean
1972
9.0 C
-0.95 C
1973
10.6 C
+0.64 C
1974
9.4 C
-0.52 C
1975
9.9 C
-0.02 C
1976
8.9 C
-1.05 C
1977
9.4 C
-0.58 C
1978
8.2 C
-1.75 C
1979
8.6 C
-1.39 C
1980
9.2 C
-0.74 C
1981
9.4 C
-0.60 C
1982
9.3 C
-0.70 C
1983
10.2 C
+0.23 C
1984
9.6 C
-0.40 C
1985
9.9 C
-0.04 C
1986
10.1 C
+0.15 C
1988
7.5 C
-2.48 C
1990
11.1 C
+1.10 C
1991
11.2 C
+1.24 C
1992
9.8 C
-0.19 C
1993
9.7 C
-0.30 C
1994
9.9 C
-0.03 C
1995
9.9 C
-0.09 C
1996
9.3 C
-0.64 C
1997
9.6 C
-0.32 C
1998
12.2 C
+2.25 C
1999
10.9 C
+0.90 C
2001
11.1 C
+1.10 C
2002
11.1 C
+1.09 C
2004
10.4 C
+0.48 C
2005
10.8 C
+0.88 C
2006
11.3 C
+1.29 C
2007
10.8 C
+0.87 C
2008
10.0 C
0.00 C
2009
10.0 C
+0.01 C
2010
10.9 C
+0.89 C
2011
10.9 C
+0.92 C
2013
9.4 C
-0.53 C
2014
8.2 C
-1.74 C
2015
9.9 C
-0.07 C
2017
11.0 C
+1.07 C
2018
10.0 C
+0.08 C
The annual mean temperature here has risen by 0.3 C (0.1 to 0.5) per decade over 1972 to 2018. In Fahrenheit: 0.5 F (0.1 to 0.9) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Bluffton 6N
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.3 C (0.1 to 0.5) per decade
0.5 F (0.1 to 0.9) per decade
1972 to 2018
41
Rise
Mean daily maximum
0.20 C (0.00 to 0.40) per decade
0.37 F (0.01 to 0.73) per decade
1972 to 2018
41
Rise
Mean daily minimum
0.3 C (0.1 to 0.6) per decade
0.6 F (0.2 to 1.0) per decade
1972 to 2018
41
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
1971 to 2023
Yearly extremes at Bluffton 6N: 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)
1980
34.4 C (93.9 F)
53
Coldest night (TNn)
-31.1 C (-24.0 F)
1985
-22.8 C (-9.0 F)
53
Wettest day (Rx1day)
136.4 mm (5.4 in)
1998
52.6 mm (2.1 in)
53
Wettest five days (Rx5day)
196.1 mm (7.7 in)
2003
83.8 mm (3.3 in)
51
Longest dry spell (CDD)
28 days
2001
15 days
53
Hottest day (TXx)
The hottest day of the year at Bluffton 6N, 1971 to 2023. The record is 40.0 C (104.0 F) in 1980, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Bluffton 6N by year
Year
Hottest day (TXx)
1971
36.1 C (97.0 F)
1972
33.3 C (91.9 F)
1973
33.3 C (91.9 F)
1974
35.6 C (96.1 F)
1975
34.4 C (93.9 F)
1976
33.9 C (93.0 F)
1977
36.1 C (97.0 F)
1978
33.9 C (93.0 F)
1979
32.2 C (90.0 F)
1980
40.0 C (104.0 F)
1981
33.9 C (93.0 F)
1982
33.3 C (91.9 F)
1983
37.2 C (99.0 F)
1984
34.4 C (93.9 F)
1985
33.9 C (93.0 F)
1986
33.9 C (93.0 F)
1987
33.3 C (91.9 F)
1988
37.8 C (100.0 F)
1989
33.9 C (93.0 F)
1990
35.6 C (96.1 F)
1991
35.6 C (96.1 F)
1992
33.3 C (91.9 F)
1993
33.3 C (91.9 F)
1994
37.2 C (99.0 F)
1995
36.1 C (97.0 F)
1996
34.4 C (93.9 F)
1997
34.4 C (93.9 F)
1998
34.4 C (93.9 F)
1999
38.9 C (102.0 F)
2000
32.8 C (91.0 F)
2001
32.8 C (91.0 F)
2002
35.0 C (95.0 F)
2003
37.8 C (100.0 F)
2004
32.8 C (91.0 F)
2005
35.6 C (96.1 F)
2006
35.0 C (95.0 F)
2007
34.4 C (93.9 F)
2008
35.0 C (95.0 F)
2009
34.4 C (93.9 F)
2010
35.0 C (95.0 F)
2011
38.3 C (100.9 F)
2012
37.8 C (100.0 F)
2013
35.0 C (95.0 F)
2014
31.7 C (89.1 F)
2015
31.7 C (89.1 F)
2016
32.8 C (91.0 F)
2017
33.3 C (91.9 F)
2018
35.0 C (95.0 F)
2019
33.9 C (93.0 F)
2020
32.2 C (90.0 F)
2021
32.8 C (91.0 F)
2022
11.1 C (52.0 F)
2023
32.2 C (90.0 F)
Coldest night (TNn)
The coldest night of the year at Bluffton 6N, 1971 to 2023. The record is -31.1 C (-24.0 F) in 1985, marked on the chart; the median year is -22.8 C (-9.0 F).
Coldest night (TNn) at Bluffton 6N by year
Year
Coldest night (TNn)
1971
-11.1 C (12.0 F)
1972
-28.9 C (-20.0 F)
1973
-23.9 C (-11.0 F)
1974
-21.7 C (-7.1 F)
1975
-27.8 C (-18.0 F)
1976
-25.0 C (-13.0 F)
1977
-27.8 C (-18.0 F)
1978
-26.1 C (-15.0 F)
1979
-25.6 C (-14.1 F)
1980
-22.2 C (-8.0 F)
1981
-21.7 C (-7.1 F)
1982
-27.8 C (-18.0 F)
1983
-27.8 C (-18.0 F)
1984
-29.4 C (-20.9 F)
1985
-31.1 C (-24.0 F)
1986
-20.0 C (-4.0 F)
1987
-22.8 C (-9.0 F)
1988
-23.9 C (-11.0 F)
1989
-22.8 C (-9.0 F)
1990
-19.4 C (-2.9 F)
1991
-16.7 C (1.9 F)
1992
-23.9 C (-11.0 F)
1993
-22.2 C (-8.0 F)
1994
-30.0 C (-22.0 F)
1995
-20.0 C (-4.0 F)
1996
-23.3 C (-9.9 F)
1997
-23.3 C (-9.9 F)
1998
-13.9 C (7.0 F)
1999
-24.4 C (-11.9 F)
2000
-25.6 C (-14.1 F)
2001
-16.7 C (1.9 F)
2002
-16.7 C (1.9 F)
2003
-22.8 C (-9.0 F)
2004
-23.9 C (-11.0 F)
2005
-20.6 C (-5.1 F)
2006
-16.1 C (3.0 F)
2007
-22.2 C (-8.0 F)
2008
-19.4 C (-2.9 F)
2009
-27.2 C (-17.0 F)
2010
-17.8 C (0.0 F)
2011
-22.8 C (-9.0 F)
2012
-16.1 C (3.0 F)
2013
-19.4 C (-2.9 F)
2014
-27.2 C (-17.0 F)
2015
-23.3 C (-9.9 F)
2016
-21.7 C (-7.1 F)
2017
-23.9 C (-11.0 F)
2018
-26.7 C (-16.1 F)
2019
-30.0 C (-22.0 F)
2020
-6.7 C (19.9 F)
2021
-7.2 C (19.0 F)
2022
-13.9 C (7.0 F)
2023
0.6 C (33.1 F)
Wettest day (Rx1day)
The wettest day of the year at Bluffton 6N, 1971 to 2023. The record is 136.4 mm (5.4 in) in 1998, marked on the chart; the median year is 52.6 mm (2.1 in).
Wettest day (Rx1day) at Bluffton 6N by year
Year
Wettest day (Rx1day)
1971
68.1 mm (2.7 in)
1972
44.5 mm (1.8 in)
1973
52.6 mm (2.1 in)
1974
67.3 mm (2.6 in)
1975
65.3 mm (2.6 in)
1976
38.4 mm (1.5 in)
1977
71.4 mm (2.8 in)
1978
45.7 mm (1.8 in)
1979
39.4 mm (1.6 in)
1980
76.2 mm (3.0 in)
1981
114.8 mm (4.5 in)
1982
39.6 mm (1.6 in)
1983
41.1 mm (1.6 in)
1984
41.7 mm (1.6 in)
1985
42.2 mm (1.7 in)
1986
40.1 mm (1.6 in)
1987
49.0 mm (1.9 in)
1988
43.2 mm (1.7 in)
1989
95.8 mm (3.8 in)
1990
101.6 mm (4.0 in)
1991
74.2 mm (2.9 in)
1992
101.9 mm (4.0 in)
1993
40.6 mm (1.6 in)
1994
57.2 mm (2.3 in)
1995
36.6 mm (1.4 in)
1996
94.0 mm (3.7 in)
1997
45.2 mm (1.8 in)
1998
136.4 mm (5.4 in)
1999
45.0 mm (1.8 in)
2000
50.8 mm (2.0 in)
2001
45.7 mm (1.8 in)
2002
66.0 mm (2.6 in)
2003
132.3 mm (5.2 in)
2004
53.6 mm (2.1 in)
2005
52.1 mm (2.1 in)
2006
52.6 mm (2.1 in)
2007
85.1 mm (3.4 in)
2008
35.6 mm (1.4 in)
2009
70.1 mm (2.8 in)
2010
79.5 mm (3.1 in)
2011
64.3 mm (2.5 in)
2012
48.3 mm (1.9 in)
2013
64.8 mm (2.6 in)
2014
82.3 mm (3.2 in)
2015
83.3 mm (3.3 in)
2016
35.3 mm (1.4 in)
2017
45.0 mm (1.8 in)
2018
76.7 mm (3.0 in)
2019
64.3 mm (2.5 in)
2020
46.0 mm (1.8 in)
2021
50.0 mm (2.0 in)
2022
21.8 mm (0.9 in)
2023
0.0 mm (0.00 in)
Wettest five days (Rx5day)
The wettest five days of the year at Bluffton 6N, 1971 to 2023. The record is 196.1 mm (7.7 in) in 2003, marked on the chart; the median year is 83.8 mm (3.3 in).
Wettest five days (Rx5day) at Bluffton 6N by year
Year
Wettest five days (Rx5day)
1971
106.7 mm (4.2 in)
1972
85.4 mm (3.4 in)
1973
88.4 mm (3.5 in)
1974
92.0 mm (3.6 in)
1975
90.2 mm (3.6 in)
1976
49.0 mm (1.9 in)
1977
78.8 mm (3.1 in)
1978
55.6 mm (2.2 in)
1979
68.1 mm (2.7 in)
1980
105.3 mm (4.1 in)
1981
117.1 mm (4.6 in)
1982
66.1 mm (2.6 in)
1983
75.5 mm (3.0 in)
1984
72.2 mm (2.8 in)
1985
82.3 mm (3.2 in)
1986
71.8 mm (2.8 in)
1987
71.8 mm (2.8 in)
1988
51.3 mm (2.0 in)
1989
122.0 mm (4.8 in)
1990
121.7 mm (4.8 in)
1991
120.1 mm (4.7 in)
1992
168.3 mm (6.6 in)
1993
88.1 mm (3.5 in)
1994
69.7 mm (2.7 in)
1995
81.8 mm (3.2 in)
1996
148.1 mm (5.8 in)
1997
83.8 mm (3.3 in)
1998
166.6 mm (6.6 in)
1999
70.2 mm (2.8 in)
2000
77.7 mm (3.1 in)
2001
79.5 mm (3.1 in)
2002
66.3 mm (2.6 in)
2003
196.1 mm (7.7 in)
2004
124.0 mm (4.9 in)
2005
75.0 mm (3.0 in)
2006
86.8 mm (3.4 in)
2007
102.4 mm (4.0 in)
2008
75.2 mm (3.0 in)
2009
104.8 mm (4.1 in)
2010
87.1 mm (3.4 in)
2011
129.9 mm (5.1 in)
2012
57.2 mm (2.3 in)
2013
82.4 mm (3.2 in)
2014
93.8 mm (3.7 in)
2015
171.4 mm (6.7 in)
2016
66.6 mm (2.6 in)
2017
76.8 mm (3.0 in)
2018
119.1 mm (4.7 in)
2019
109.3 mm (4.3 in)
2020
46.0 mm (1.8 in)
2021
71.4 mm (2.8 in)
2022
n/a
2023
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Bluffton 6N, 1971 to 2023. The record is 28 days in 2001, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Bluffton 6N by year
Year
Longest dry spell (CDD)
1971
10 days
1972
14 days
1973
14 days
1974
15 days
1975
17 days
1976
27 days
1977
24 days
1978
13 days
1979
17 days
1980
13 days
1981
15 days
1982
10 days
1983
27 days
1984
14 days
1985
13 days
1986
18 days
1987
12 days
1988
16 days
1989
22 days
1990
15 days
1991
21 days
1992
19 days
1993
18 days
1994
14 days
1995
20 days
1996
17 days
1997
15 days
1998
19 days
1999
23 days
2000
13 days
2001
28 days
2002
21 days
2003
12 days
2004
22 days
2005
15 days
2006
16 days
2007
18 days
2008
14 days
2009
17 days
2010
18 days
2011
14 days
2012
18 days
2013
19 days
2014
14 days
2015
19 days
2016
17 days
2017
13 days
2018
14 days
2019
10 days
2020
15 days
2021
10 days
2022
2 days
2023
3 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
41 years with a frost
Across 41 years with a frost, the median last spring frost at Bluffton 6N falls on 25 April and the median first autumn frost on 16 October, which leaves a median of 171 days between them.
Fitted over all years, the growing season changes by +6.0 days per decade at this station.
Frost dates and growing season at Bluffton 6N
Measure
Median, all years
Earliest period
Recent period (1983 to 2018)
Recent against earliest
Fitted trend
Last spring frost
25 April
n/a
23 April
n/a
-1.9 days per decade
First autumn frost
16 October
n/a
17 October
n/a
+4.1 days per decade
Growing days
171 days
n/a
175 days
n/a
+6.0 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
45 years, 1972 to 2018
A day with at least 57.2 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 166.3 mm (6.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Bluffton 6N: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
57.2 mm (2.3 in)
5 years
79.6 mm (3.1 in)
10 years
96.9 mm (3.8 in)
25 years
121.8 mm (4.8 in)
50 years
142.9 mm (5.6 in)
Longer than the 45 years of record
100 years
166.3 mm (6.5 in)
Longer than the 45 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, 45 years of values from 1972 to 2018.
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: 136.4 mm (5.4 in) in 1998; 132.3 mm (5.2 in) in 2003; 114.8 mm (4.5 in) in 1981.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2001 to 2018 against 1961 to 1990
Over 2001 to 2018, Bluffton 6N had a mean temperature of 10.4 C (50.7 F) and 1,075.0 mm (42.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Crawfordsville Pwr Plt (United States, 170 km away), Greenfield (United States, 125 km away) and Oaklandon Geist Rsvr (United States, 124 km away).
Climate twins of Bluffton 6N: stations whose 1961 to 1990 climate is closest to its 2001 to 2018 climate
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
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Data for Bluffton 6N standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Bluffton 6N 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.