Record envelope, standing records and threshold days for Arbon 2 NW (USC00100347), Idaho, United States, with 41 years of record.
Key Facts for Arbon 2 NW
Arbon 2 NW (USC00100347) is a weather station in Idaho, United States at 42.50 latitude and -112.58 longitude, 1,588 m (5,210 ft) above sea level.
The station reports from 1962 to 2002, 41 years of record.
1,464 records set at Arbon 2 NW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Arbon 2 NW set a monthly record low minimum temperature of -17.2 C (1.0 F) on 31 October 2002.
About the Station
Location: Idaho, United States, 42.50 latitude, -112.58 longitude.
Elevation: 1,588 m (5,210 ft).
Period of record: 1962 to 2002, 41 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 Arbon 2 NW. 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 Arbon 2 NW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.8 C (55.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Feb
16.7 C (62.1 F)
-35.6 C (-32.1 F)
n/a
n/a
Mar
23.3 C (73.9 F)
-22.2 C (-8.0 F)
n/a
n/a
Apr
28.3 C (82.9 F)
-13.3 C (8.1 F)
n/a
n/a
May
32.2 C (90.0 F)
-9.4 C (15.1 F)
n/a
n/a
Jun
37.2 C (99.0 F)
-5.0 C (23.0 F)
n/a
n/a
Jul
38.9 C (102.0 F)
-0.6 C (30.9 F)
n/a
n/a
Aug
37.8 C (100.0 F)
-5.0 C (23.0 F)
n/a
n/a
Sep
34.4 C (93.9 F)
-9.4 C (15.1 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-17.2 C (1.0 F)
n/a
n/a
Nov
20.6 C (69.1 F)
-26.1 C (-15.0 F)
n/a
n/a
Dec
13.3 C (55.9 F)
-38.3 C (-36.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Arbon 2 NW still stand. 1969 holds the most, with 59.
Standing records at Arbon 2 NW by the year they were set
Year set
Standing records
1962
15
1963
49
1964
42
1965
55
1966
37
1967
29
1968
36
1969
59
1970
36
1971
28
1972
44
1973
22
1974
43
1975
39
1976
30
1977
46
1978
39
1979
32
1980
37
1981
38
1982
34
1983
32
1984
46
1985
46
1986
33
1987
30
1988
42
1989
36
1990
44
1991
28
1992
40
1993
48
1994
41
1995
32
1996
24
1998
10
1999
31
2000
38
2001
32
2002
41
All-Time Record Progression
1 new records
1 all-time records were set at Arbon 2 NW between 12 July 2002 and 12 July 2002. Each dot is a new record.
When Arbon 2 NW set new all-time records
Date
Kind
Detail
2002-07-12
Record high maximum temperature
Record high maximum temperature 38.9 C (102.0 F)
Wettest Day of Each Month
Dec: 81.3 mm (3.2 in)
The wettest day on record for each calendar month at Arbon 2 NW. The most was 81.3 mm (3.2 in) on 23 December 1964.
Record daily precipitation for each month at Arbon 2 NW
Month
Record daily precipitation (mm)
Date
Jan
38.9 mm (1.5 in)
13 January 1980
Feb
50.8 mm (2.0 in)
1 February 1963
Mar
31.8 mm (1.3 in)
5 March 1990
Apr
27.9 mm (1.1 in)
15 April 2002
May
41.4 mm (1.6 in)
21 May 1981
Jun
30.5 mm (1.2 in)
14 June 1973
Jul
45.7 mm (1.8 in)
23 July 1983
Aug
31.8 mm (1.3 in)
21 August 1993
Sep
41.9 mm (1.6 in)
8 September 1983
Oct
31.5 mm (1.2 in)
26 October 1975
Nov
33.0 mm (1.3 in)
29 November 2001
Dec
81.3 mm (3.2 in)
23 December 1964
Period of Record Coverage
1962 to 2002
Complete yearUnder 90 percent of days
40 years of record at Arbon 2 NW, 1962 to 2002. 9 years have data for under 90 percent of days and are left out of rankings: 1962, 1964, 1994, 1995, 1996, 1998, 1999, 2000 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 28 complete years at Arbon 2 NW, 1963 to 2001. Blue stripes are years cooler than the station's own mean of 6.9 C (44.5 F); red stripes are warmer. The coolest year was 1993, at 5.3 C (41.5 F), and the warmest was 1981, at 8.4 C (47.1 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Arbon 2 NW as warming stripes, 1963 to 2001
Year
Annual mean temperature
Difference from the station mean
1963
7.3 C
+0.39 C
1965
6.8 C
-0.12 C
1966
7.0 C
+0.03 C
1967
7.1 C
+0.20 C
1969
6.8 C
-0.13 C
1970
7.0 C
+0.03 C
1971
6.2 C
-0.75 C
1972
6.9 C
-0.06 C
1973
6.7 C
-0.27 C
1974
7.1 C
+0.13 C
1975
6.3 C
-0.68 C
1976
7.0 C
+0.03 C
1977
7.8 C
+0.83 C
1978
6.7 C
-0.22 C
1980
7.5 C
+0.53 C
1981
8.4 C
+1.45 C
1982
5.9 C
-1.07 C
1984
5.5 C
-1.43 C
1985
5.3 C
-1.67 C
1986
7.7 C
+0.74 C
1987
7.7 C
+0.78 C
1988
7.8 C
+0.84 C
1989
6.9 C
-0.07 C
1990
7.5 C
+0.55 C
1991
6.9 C
-0.07 C
1992
7.9 C
+0.98 C
1993
5.3 C
-1.68 C
2001
7.7 C
+0.72 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1962 to 2002
Yearly extremes at Arbon 2 NW: 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)
2002
36.1 C (97.0 F)
40
Coldest night (TNn)
-38.3 C (-36.9 F)
1990
-26.4 C (-15.5 F)
40
Wettest day (Rx1day)
81.3 mm (3.2 in)
1964
24.3 mm (1.0 in)
40
Wettest five days (Rx5day)
153.0 mm (6.0 in)
1964
41.1 mm (1.6 in)
40
Longest dry spell (CDD)
64 days
1994
33 days
40
Hottest day (TXx)
The hottest day of the year at Arbon 2 NW, 1962 to 2002. The record is 38.9 C (102.0 F) in 2002, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Arbon 2 NW by year
Year
Hottest day (TXx)
1962
36.7 C (98.1 F)
1963
36.7 C (98.1 F)
1964
35.0 C (95.0 F)
1965
36.7 C (98.1 F)
1966
38.3 C (100.9 F)
1967
34.4 C (93.9 F)
1968
35.6 C (96.1 F)
1969
36.7 C (98.1 F)
1970
35.0 C (95.0 F)
1971
36.1 C (97.0 F)
1972
36.1 C (97.0 F)
1973
36.7 C (98.1 F)
1974
36.1 C (97.0 F)
1975
35.0 C (95.0 F)
1976
35.6 C (96.1 F)
1977
35.0 C (95.0 F)
1978
36.7 C (98.1 F)
1979
37.8 C (100.0 F)
1980
36.7 C (98.1 F)
1981
37.8 C (100.0 F)
1982
35.0 C (95.0 F)
1983
35.0 C (95.0 F)
1984
34.4 C (93.9 F)
1985
36.1 C (97.0 F)
1986
35.0 C (95.0 F)
1987
34.4 C (93.9 F)
1988
37.2 C (99.0 F)
1989
36.7 C (98.1 F)
1990
36.1 C (97.0 F)
1991
35.6 C (96.1 F)
1992
36.7 C (98.1 F)
1993
31.7 C (89.1 F)
1994
37.2 C (99.0 F)
1995
36.1 C (97.0 F)
1996
35.6 C (96.1 F)
1998
36.7 C (98.1 F)
1999
33.9 C (93.0 F)
2000
38.3 C (100.9 F)
2001
37.2 C (99.0 F)
2002
38.9 C (102.0 F)
Coldest night (TNn)
The coldest night of the year at Arbon 2 NW, 1962 to 2002. The record is -38.3 C (-36.9 F) in 1990, marked on the chart; the median year is -26.4 C (-15.5 F).
Coldest night (TNn) at Arbon 2 NW by year
Year
Coldest night (TNn)
1962
-21.7 C (-7.1 F)
1963
-31.1 C (-24.0 F)
1964
-31.7 C (-25.1 F)
1965
-25.0 C (-13.0 F)
1966
-20.6 C (-5.1 F)
1967
-24.4 C (-11.9 F)
1968
-21.1 C (-6.0 F)
1969
-23.9 C (-11.0 F)
1970
-28.9 C (-20.0 F)
1971
-28.9 C (-20.0 F)
1972
-33.3 C (-27.9 F)
1973
-27.2 C (-17.0 F)
1974
-24.4 C (-11.9 F)
1975
-27.2 C (-17.0 F)
1976
-23.9 C (-11.0 F)
1977
-29.4 C (-20.9 F)
1978
-30.0 C (-22.0 F)
1979
-30.6 C (-23.1 F)
1980
-26.7 C (-16.1 F)
1981
-20.6 C (-5.1 F)
1982
-35.6 C (-32.1 F)
1983
-33.9 C (-29.0 F)
1984
-33.3 C (-27.9 F)
1985
-33.9 C (-29.0 F)
1986
-20.6 C (-5.1 F)
1987
-25.0 C (-13.0 F)
1988
-25.6 C (-14.1 F)
1989
-31.1 C (-24.0 F)
1990
-38.3 C (-36.9 F)
1991
-26.1 C (-15.0 F)
1992
-27.8 C (-18.0 F)
1993
-29.4 C (-20.9 F)
1994
-23.3 C (-9.9 F)
1995
-16.7 C (1.9 F)
1996
-22.2 C (-8.0 F)
1998
-25.6 C (-14.1 F)
1999
-21.1 C (-6.0 F)
2000
-20.0 C (-4.0 F)
2001
-24.4 C (-11.9 F)
2002
-28.9 C (-20.0 F)
Wettest day (Rx1day)
The wettest day of the year at Arbon 2 NW, 1962 to 2002. The record is 81.3 mm (3.2 in) in 1964, marked on the chart; the median year is 24.3 mm (1.0 in).
Wettest day (Rx1day) at Arbon 2 NW by year
Year
Wettest day (Rx1day)
1962
36.1 mm (1.4 in)
1963
50.8 mm (2.0 in)
1964
81.3 mm (3.2 in)
1965
26.2 mm (1.0 in)
1966
22.1 mm (0.9 in)
1967
18.5 mm (0.7 in)
1968
23.6 mm (0.9 in)
1969
16.5 mm (0.6 in)
1970
25.4 mm (1.0 in)
1971
22.9 mm (0.9 in)
1972
17.3 mm (0.7 in)
1973
30.5 mm (1.2 in)
1974
16.5 mm (0.6 in)
1975
31.5 mm (1.2 in)
1976
19.8 mm (0.8 in)
1977
27.9 mm (1.1 in)
1978
18.0 mm (0.7 in)
1979
30.5 mm (1.2 in)
1980
38.9 mm (1.5 in)
1981
41.4 mm (1.6 in)
1982
27.9 mm (1.1 in)
1983
45.7 mm (1.8 in)
1984
22.9 mm (0.9 in)
1985
15.7 mm (0.6 in)
1986
23.1 mm (0.9 in)
1987
24.9 mm (1.0 in)
1988
17.3 mm (0.7 in)
1989
19.1 mm (0.8 in)
1990
31.8 mm (1.3 in)
1991
21.6 mm (0.9 in)
1992
20.3 mm (0.8 in)
1993
31.8 mm (1.3 in)
1994
25.4 mm (1.0 in)
1995
19.8 mm (0.8 in)
1996
35.1 mm (1.4 in)
1998
17.8 mm (0.7 in)
1999
23.6 mm (0.9 in)
2000
21.6 mm (0.9 in)
2001
33.0 mm (1.3 in)
2002
29.7 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Arbon 2 NW, 1962 to 2002. The record is 153.0 mm (6.0 in) in 1964, marked on the chart; the median year is 41.1 mm (1.6 in).
Wettest five days (Rx5day) at Arbon 2 NW by year
Year
Wettest five days (Rx5day)
1962
39.9 mm (1.6 in)
1963
119.4 mm (4.7 in)
1964
153.0 mm (6.0 in)
1965
47.5 mm (1.9 in)
1966
29.3 mm (1.2 in)
1967
37.0 mm (1.5 in)
1968
48.0 mm (1.9 in)
1969
39.4 mm (1.6 in)
1970
36.6 mm (1.4 in)
1971
41.4 mm (1.6 in)
1972
40.7 mm (1.6 in)
1973
43.9 mm (1.7 in)
1974
35.5 mm (1.4 in)
1975
46.6 mm (1.8 in)
1976
25.9 mm (1.0 in)
1977
50.0 mm (2.0 in)
1978
29.0 mm (1.1 in)
1979
36.9 mm (1.5 in)
1980
124.3 mm (4.9 in)
1981
61.8 mm (2.4 in)
1982
46.4 mm (1.8 in)
1983
50.0 mm (2.0 in)
1984
37.9 mm (1.5 in)
1985
27.5 mm (1.1 in)
1986
83.9 mm (3.3 in)
1987
47.0 mm (1.9 in)
1988
32.5 mm (1.3 in)
1989
35.3 mm (1.4 in)
1990
38.3 mm (1.5 in)
1991
49.5 mm (1.9 in)
1992
31.3 mm (1.2 in)
1993
53.2 mm (2.1 in)
1994
38.9 mm (1.5 in)
1995
46.6 mm (1.8 in)
1996
71.4 mm (2.8 in)
1998
28.7 mm (1.1 in)
1999
38.3 mm (1.5 in)
2000
38.1 mm (1.5 in)
2001
43.5 mm (1.7 in)
2002
41.6 mm (1.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Arbon 2 NW, 1962 to 2002. The record is 64 days in 1994, marked on the chart; the median year is 33 days.
Longest dry spell (CDD) at Arbon 2 NW by year
Year
Longest dry spell (CDD)
1962
31 days
1963
19 days
1964
38 days
1965
28 days
1966
44 days
1967
26 days
1968
33 days
1969
41 days
1970
23 days
1971
52 days
1972
25 days
1973
25 days
1974
50 days
1975
22 days
1976
39 days
1977
38 days
1978
53 days
1979
36 days
1980
28 days
1981
32 days
1982
16 days
1983
18 days
1984
16 days
1985
30 days
1986
26 days
1987
52 days
1988
43 days
1989
38 days
1990
36 days
1991
25 days
1992
43 days
1993
34 days
1994
64 days
1995
24 days
1996
35 days
1998
25 days
1999
40 days
2000
33 days
2001
30 days
2002
41 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
28 years with a frost
Across 28 years with a frost, the median last spring frost at Arbon 2 NW falls on 13 June and the median first autumn frost on 8 September, which leaves a median of 89 days between them.
Fitted over all years, the growing season changes by -5.1 days per decade at this station.
Frost dates and growing season at Arbon 2 NW
Measure
Median, all years
Earliest period
Recent period (1963 to 2001)
Recent against earliest
Fitted trend
Last spring frost
13 June
n/a
13 June
n/a
+1.7 days per decade
First autumn frost
8 September
n/a
8 September
n/a
-3.4 days per decade
Growing days
89 days
n/a
89 days
n/a
-5.1 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
32 years, 1963 to 2001
A day with at least 24.2 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 58.7 mm (2.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Arbon 2 NW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
24.2 mm (1.0 in)
5 years
31.9 mm (1.3 in)
10 years
37.6 mm (1.5 in)
25 years
45.5 mm (1.8 in)
50 years
51.8 mm (2.0 in)
Longer than the 32 years of record
100 years
58.7 mm (2.3 in)
Longer than the 32 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, 32 years of values from 1963 to 2001.
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: 50.8 mm (2.0 in) in 1963; 45.7 mm (1.8 in) in 1983; 41.4 mm (1.6 in) in 1981.
Download the Data
Data for Arbon 2 NW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Arbon 2 NW 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.