Record envelope, standing records and threshold days for East Hiram (USC00172238), Maine, United States, with 40 years of record.
Key Facts for East Hiram
East Hiram (USC00172238) is a weather station in Maine, United States at 43.88 latitude and -70.75 longitude, 161 m (528 ft) above sea level.
The station reports from 1970 to 2009, 40 years of record.
1,464 records set at East Hiram still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
East Hiram tied a daily record low minimum temperature of 9.4 C (48.9 F) on 15 July 2009.
About the Station
Location: Maine, United States, 43.88 latitude, -70.75 longitude.
Elevation: 161 m (528 ft).
Period of record: 1970 to 2009, 40 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 East Hiram. 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 East Hiram, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
17.8 C (64.0 F)
-37.2 C (-35.0 F)
n/a
n/a
Feb
17.8 C (64.0 F)
-36.1 C (-33.0 F)
n/a
n/a
Mar
26.1 C (79.0 F)
-30.0 C (-22.0 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-13.3 C (8.1 F)
n/a
n/a
May
34.4 C (93.9 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
34.4 C (93.9 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
36.7 C (98.1 F)
2.2 C (36.0 F)
n/a
n/a
Aug
38.9 C (102.0 F)
-1.1 C (30.0 F)
n/a
n/a
Sep
34.4 C (93.9 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
30.0 C (86.0 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
23.3 C (73.9 F)
-21.1 C (-6.0 F)
n/a
n/a
Dec
20.6 C (69.1 F)
-31.7 C (-25.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at East Hiram still stand. 1979 holds the most, with 72.
Standing records at East Hiram by the year they were set
Year set
Standing records
1970
7
1971
61
1972
51
1973
53
1974
44
1975
39
1976
65
1977
48
1978
48
1979
72
1980
20
1981
9
1982
41
1983
34
1984
50
1985
28
1986
42
1987
46
1988
38
1989
47
1990
39
1991
41
1992
43
1993
53
1994
33
1995
25
1996
31
1997
23
1998
19
1999
28
2000
28
2001
32
2002
50
2003
32
2004
16
2005
28
2006
23
2007
38
2008
22
2009
17
All-Time Record Progression
1 new records
1 all-time records were set at East Hiram between 15 January 2004 and 15 January 2004. Each dot is a new record.
When East Hiram set new all-time records
Date
Kind
Detail
2004-01-15
Record low maximum temperature
Record low maximum temperature -20.0 C (-4.0 F)
Wettest Day of Each Month
Sep: 173.2 mm (6.8 in)
The wettest day on record for each calendar month at East Hiram. The most was 173.2 mm (6.8 in) on 17 September 1999.
Record daily precipitation for each month at East Hiram
Month
Record daily precipitation (mm)
Date
Jan
64.0 mm (2.5 in)
11 January 1983
Feb
73.2 mm (2.9 in)
15 February 2007
Mar
93.5 mm (3.7 in)
20 March 1983
Apr
99.1 mm (3.9 in)
29 April 1988
May
74.9 mm (2.9 in)
12 May 1989
Jun
93.7 mm (3.7 in)
14 June 1998
Jul
82.3 mm (3.2 in)
14 July 1996
Aug
99.3 mm (3.9 in)
20 August 1991
Sep
173.2 mm (6.8 in)
17 September 1999
Oct
137.2 mm (5.4 in)
22 October 1996
Nov
105.2 mm (4.1 in)
5 November 1983
Dec
69.9 mm (2.8 in)
22 December 1993
Period of Record Coverage
1970 to 2009
Complete yearUnder 90 percent of days
40 years of record at East Hiram, 1970 to 2009. 4 years have data for under 90 percent of days and are left out of rankings: 1970, 1980, 1981, 2009.
Cooler than the station meanWarmer than the station mean
One stripe for each of 34 complete years at East Hiram, 1971 to 2008. Blue stripes are years cooler than the station's own mean of 6.1 C (43.0 F); red stripes are warmer. The coolest year was 1972, at 5.0 C (41.0 F), and the warmest was 2006, at 7.5 C (45.4 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at East Hiram as warming stripes, 1971 to 2008
Year
Annual mean temperature
Difference from the station mean
1971
5.7 C
-0.39 C
1972
5.0 C
-1.10 C
1973
7.2 C
+1.04 C
1975
6.2 C
+0.10 C
1976
5.7 C
-0.42 C
1977
6.2 C
+0.13 C
1978
5.3 C
-0.81 C
1979
6.8 C
+0.65 C
1982
5.6 C
-0.48 C
1984
6.6 C
+0.46 C
1985
6.0 C
-0.08 C
1986
5.9 C
-0.19 C
1987
6.0 C
-0.11 C
1988
5.9 C
-0.21 C
1989
5.2 C
-0.96 C
1990
7.0 C
+0.89 C
1991
6.8 C
+0.71 C
1992
5.4 C
-0.68 C
1993
5.6 C
-0.56 C
1994
5.7 C
-0.39 C
1995
6.1 C
-0.06 C
1996
5.8 C
-0.30 C
1997
5.4 C
-0.75 C
1998
7.5 C
+1.35 C
1999
7.2 C
+1.10 C
2000
5.8 C
-0.34 C
2001
6.5 C
+0.35 C
2002
6.5 C
+0.42 C
2003
5.3 C
-0.77 C
2004
5.7 C
-0.42 C
2005
6.2 C
+0.11 C
2006
7.5 C
+1.36 C
2007
6.0 C
-0.16 C
2008
6.5 C
+0.42 C
The fitted trend in annual mean temperature here over 1971 to 2008 is 0.1 C (-0.1 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.2 to 0.6) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at East Hiram
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.3) per decade
0.2 F (-0.2 to 0.6) per decade
1971 to 2008
34
Not clearly different from zero
Mean daily maximum
-0.3 C (-0.5 to -0.1) per decade
-0.5 F (-0.9 to -0.1) per decade
1971 to 2008
34
Fall
Mean daily minimum
0.5 C (0.3 to 0.7) per decade
0.9 F (0.5 to 1.3) per decade
1971 to 2008
34
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
1970 to 2009
Yearly extremes at East Hiram: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.9 C (102.0 F)
1975
33.9 C (93.0 F)
40
Coldest night (TNn)
-37.2 C (-35.0 F)
1971
-30.0 C (-22.0 F)
40
Wettest day (Rx1day)
173.2 mm (6.8 in)
1999
71.0 mm (2.8 in)
40
Wettest five days (Rx5day)
241.3 mm (9.5 in)
1996
89.1 mm (3.5 in)
40
Longest dry spell (CDD)
23 days
1978
14 days
40
Hottest day (TXx)
The hottest day of the year at East Hiram, 1970 to 2009. The record is 38.9 C (102.0 F) in 1975, marked on the chart; the median year is 33.9 C (93.0 F).
Hottest day (TXx) at East Hiram by year
Year
Hottest day (TXx)
1970
14.4 C (57.9 F)
1971
35.0 C (95.0 F)
1972
32.2 C (90.0 F)
1973
35.0 C (95.0 F)
1974
32.2 C (90.0 F)
1975
38.9 C (102.0 F)
1976
34.4 C (93.9 F)
1977
36.7 C (98.1 F)
1978
35.0 C (95.0 F)
1979
34.4 C (93.9 F)
1980
33.3 C (91.9 F)
1981
30.0 C (86.0 F)
1982
34.4 C (93.9 F)
1983
34.4 C (93.9 F)
1984
33.9 C (93.0 F)
1985
33.3 C (91.9 F)
1986
33.9 C (93.0 F)
1987
34.4 C (93.9 F)
1988
34.4 C (93.9 F)
1989
33.9 C (93.0 F)
1990
33.3 C (91.9 F)
1991
36.1 C (97.0 F)
1992
34.4 C (93.9 F)
1993
35.0 C (95.0 F)
1994
34.4 C (93.9 F)
1995
34.4 C (93.9 F)
1996
31.1 C (88.0 F)
1997
32.8 C (91.0 F)
1998
32.8 C (91.0 F)
1999
34.4 C (93.9 F)
2000
31.1 C (88.0 F)
2001
35.6 C (96.1 F)
2002
35.6 C (96.1 F)
2003
33.3 C (91.9 F)
2004
32.8 C (91.0 F)
2005
33.3 C (91.9 F)
2006
32.8 C (91.0 F)
2007
33.3 C (91.9 F)
2008
32.2 C (90.0 F)
2009
32.8 C (91.0 F)
Coldest night (TNn)
The coldest night of the year at East Hiram, 1970 to 2009. The record is -37.2 C (-35.0 F) in 1971, marked on the chart; the median year is -30.0 C (-22.0 F).
Coldest night (TNn) at East Hiram by year
Year
Coldest night (TNn)
1970
-30.6 C (-23.1 F)
1971
-37.2 C (-35.0 F)
1972
-34.4 C (-29.9 F)
1973
-32.8 C (-27.0 F)
1974
-32.2 C (-26.0 F)
1975
-32.2 C (-26.0 F)
1976
-36.1 C (-33.0 F)
1977
-31.7 C (-25.1 F)
1978
-31.7 C (-25.1 F)
1979
-36.1 C (-33.0 F)
1980
-25.6 C (-14.1 F)
1981
-25.6 C (-14.1 F)
1982
-31.1 C (-24.0 F)
1983
-28.3 C (-18.9 F)
1984
-33.3 C (-27.9 F)
1985
-26.1 C (-15.0 F)
1986
-28.9 C (-20.0 F)
1987
-31.7 C (-25.1 F)
1988
-30.6 C (-23.1 F)
1989
-30.6 C (-23.1 F)
1990
-26.1 C (-15.0 F)
1991
-26.1 C (-15.0 F)
1992
-26.1 C (-15.0 F)
1993
-32.2 C (-26.0 F)
1994
-33.3 C (-27.9 F)
1995
-27.2 C (-17.0 F)
1996
-30.0 C (-22.0 F)
1997
-28.3 C (-18.9 F)
1998
-27.2 C (-17.0 F)
1999
-29.4 C (-20.9 F)
2000
-28.9 C (-20.0 F)
2001
-23.9 C (-11.0 F)
2002
-22.2 C (-8.0 F)
2003
-31.7 C (-25.1 F)
2004
-28.3 C (-18.9 F)
2005
-30.0 C (-22.0 F)
2006
-20.0 C (-4.0 F)
2007
-30.0 C (-22.0 F)
2008
-28.3 C (-18.9 F)
2009
-33.3 C (-27.9 F)
Wettest day (Rx1day)
The wettest day of the year at East Hiram, 1970 to 2009. The record is 173.2 mm (6.8 in) in 1999, marked on the chart; the median year is 71.0 mm (2.8 in).
Wettest day (Rx1day) at East Hiram by year
Year
Wettest day (Rx1day)
1970
32.5 mm (1.3 in)
1971
48.0 mm (1.9 in)
1972
68.3 mm (2.7 in)
1973
70.6 mm (2.8 in)
1974
68.6 mm (2.7 in)
1975
74.7 mm (2.9 in)
1976
87.4 mm (3.4 in)
1977
92.2 mm (3.6 in)
1978
50.3 mm (2.0 in)
1979
40.1 mm (1.6 in)
1980
77.7 mm (3.1 in)
1981
60.2 mm (2.4 in)
1982
72.4 mm (2.9 in)
1983
105.2 mm (4.1 in)
1984
89.7 mm (3.5 in)
1985
71.1 mm (2.8 in)
1986
53.1 mm (2.1 in)
1987
51.8 mm (2.0 in)
1988
105.2 mm (4.1 in)
1989
74.9 mm (2.9 in)
1990
55.9 mm (2.2 in)
1991
99.3 mm (3.9 in)
1992
43.4 mm (1.7 in)
1993
69.9 mm (2.8 in)
1994
70.9 mm (2.8 in)
1995
72.4 mm (2.9 in)
1996
137.2 mm (5.4 in)
1997
71.4 mm (2.8 in)
1998
93.7 mm (3.7 in)
1999
173.2 mm (6.8 in)
2000
52.1 mm (2.1 in)
2001
63.8 mm (2.5 in)
2002
64.5 mm (2.5 in)
2003
60.2 mm (2.4 in)
2004
53.6 mm (2.1 in)
2005
131.6 mm (5.2 in)
2006
76.2 mm (3.0 in)
2007
81.5 mm (3.2 in)
2008
102.1 mm (4.0 in)
2009
39.4 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at East Hiram, 1970 to 2009. The record is 241.3 mm (9.5 in) in 1996, marked on the chart; the median year is 89.1 mm (3.5 in).
Wettest five days (Rx5day) at East Hiram by year
Year
Wettest five days (Rx5day)
1970
51.3 mm (2.0 in)
1971
99.1 mm (3.9 in)
1972
72.0 mm (2.8 in)
1973
161.0 mm (6.3 in)
1974
68.6 mm (2.7 in)
1975
86.9 mm (3.4 in)
1976
102.1 mm (4.0 in)
1977
100.3 mm (3.9 in)
1978
81.4 mm (3.2 in)
1979
101.6 mm (4.0 in)
1980
86.5 mm (3.4 in)
1981
123.0 mm (4.8 in)
1982
95.3 mm (3.8 in)
1983
148.8 mm (5.9 in)
1984
166.6 mm (6.6 in)
1985
85.9 mm (3.4 in)
1986
86.8 mm (3.4 in)
1987
86.7 mm (3.4 in)
1988
125.8 mm (5.0 in)
1989
102.4 mm (4.0 in)
1990
79.3 mm (3.1 in)
1991
135.9 mm (5.4 in)
1992
69.1 mm (2.7 in)
1993
80.3 mm (3.2 in)
1994
80.6 mm (3.2 in)
1995
88.0 mm (3.5 in)
1996
241.3 mm (9.5 in)
1997
97.8 mm (3.9 in)
1998
184.6 mm (7.3 in)
1999
189.7 mm (7.5 in)
2000
83.8 mm (3.3 in)
2001
69.7 mm (2.7 in)
2002
74.7 mm (2.9 in)
2003
82.7 mm (3.3 in)
2004
90.2 mm (3.6 in)
2005
187.7 mm (7.4 in)
2006
86.6 mm (3.4 in)
2007
181.3 mm (7.1 in)
2008
127.8 mm (5.0 in)
2009
81.8 mm (3.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at East Hiram, 1970 to 2009. The record is 23 days in 1978, marked on the chart; the median year is 14 days.
Longest dry spell (CDD) at East Hiram by year
Year
Longest dry spell (CDD)
1970
6 days
1971
15 days
1972
15 days
1973
14 days
1974
13 days
1975
14 days
1976
22 days
1977
17 days
1978
23 days
1979
15 days
1980
23 days
1981
14 days
1982
13 days
1983
14 days
1984
18 days
1985
14 days
1986
12 days
1987
20 days
1988
14 days
1989
14 days
1990
12 days
1991
18 days
1992
20 days
1993
14 days
1994
11 days
1995
14 days
1996
12 days
1997
17 days
1998
13 days
1999
12 days
2000
14 days
2001
15 days
2002
18 days
2003
16 days
2004
15 days
2005
14 days
2006
17 days
2007
14 days
2008
17 days
2009
14 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
34 years with a frost
Across 34 years with a frost, the median last spring frost at East Hiram falls on 20 May and the median first autumn frost on 24 September, which leaves a median of 125 days between them.
Fitted over all years, the growing season changes by +11.6 days per decade at this station.
Frost dates and growing season at East Hiram
Measure
Median, all years
Earliest period
Recent period (1976 to 2008)
Recent against earliest
Fitted trend
Last spring frost
20 May
n/a
19 May
n/a
-4.7 days per decade
First autumn frost
24 September
n/a
24 September
n/a
+6.9 days per decade
Growing days
125 days
n/a
127 days
n/a
+11.6 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
36 years, 1971 to 2008
A day with at least 71.2 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 180.8 mm (7.1 in) of rain is expected about once in 100 years.
Rainfall return levels at East Hiram: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
71.2 mm (2.8 in)
5 years
94.9 mm (3.7 in)
10 years
112.6 mm (4.4 in)
25 years
137.7 mm (5.4 in)
50 years
158.3 mm (6.2 in)
Longer than the 36 years of record
100 years
180.8 mm (7.1 in)
Longer than the 36 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, 36 years of values from 1971 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: 173.2 mm (6.8 in) in 1999; 137.2 mm (5.4 in) in 1996; 131.6 mm (5.2 in) in 2005.
Download the Data
Data for East Hiram standing records by year: CSV or JSON. Field meanings are on the data page.
Data for East Hiram 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.