Record envelope, standing records and threshold days for Montebello (USC00045790), California, United States, with 33 years of record.
Key Facts for Montebello
Montebello (USC00045790) is a weather station in California, United States at 34.02 latitude and -118.11 longitude, 75 m (246 ft) above sea level.
The station reports from 1979 to 2011, 33 years of record.
1,464 records set at Montebello still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Montebello set a daily record precipitation of 50.8 mm (2.0 in) on 7 March 2010.
About the Station
Location: California, United States, 34.02 latitude, -118.11 longitude.
Elevation: 75 m (246 ft).
Period of record: 1979 to 2011, 33 years.
Eligible elements: 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 Montebello. 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 Montebello, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
36.7 C (98.1 F)
-7.2 C (19.0 F)
n/a
n/a
Feb
35.0 C (95.0 F)
-2.2 C (28.0 F)
n/a
n/a
Mar
37.8 C (100.0 F)
0.6 C (33.1 F)
n/a
n/a
Apr
40.0 C (104.0 F)
3.9 C (39.0 F)
n/a
n/a
May
40.6 C (105.1 F)
6.7 C (44.1 F)
n/a
n/a
Jun
42.2 C (108.0 F)
7.8 C (46.0 F)
n/a
n/a
Jul
42.2 C (108.0 F)
8.9 C (48.0 F)
n/a
n/a
Aug
41.1 C (106.0 F)
9.4 C (48.9 F)
n/a
n/a
Sep
45.0 C (113.0 F)
10.0 C (50.0 F)
n/a
n/a
Oct
41.1 C (106.0 F)
5.6 C (42.1 F)
n/a
n/a
Nov
37.8 C (100.0 F)
1.1 C (34.0 F)
n/a
n/a
Dec
31.1 C (88.0 F)
-1.1 C (30.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Montebello still stand. 1983 holds the most, with 87.
Standing records at Montebello by the year they were set
Year set
Standing records
1979
64
1980
58
1981
53
1982
69
1983
87
1984
58
1985
74
1986
63
1987
64
1988
59
1989
86
1990
65
1991
38
1992
35
1993
22
1994
44
1995
37
1996
42
1997
58
1998
32
1999
45
2000
27
2001
29
2002
25
2003
27
2004
29
2005
25
2006
27
2007
26
2008
8
2009
34
2010
43
2011
11
All-Time Record Progression
1 new records
1 all-time records were set at Montebello between 21 January 2010 and 21 January 2010. Each dot is a new record.
When Montebello set new all-time records
Date
Kind
Detail
2010-01-21
Record daily precipitation
Record daily precipitation 177.8 mm (7.0 in)
Wettest Day of Each Month
Jan: 177.8 mm (7.0 in)
The wettest day on record for each calendar month at Montebello. The most was 177.8 mm (7.0 in) on 21 January 2010.
Record daily precipitation for each month at Montebello
Month
Record daily precipitation (mm)
Date
Jan
177.8 mm (7.0 in)
21 January 2010
Feb
160.0 mm (6.3 in)
18 February 2005
Mar
127.0 mm (5.0 in)
16 March 2003
Apr
50.8 mm (2.0 in)
14 April 2003
May
40.6 mm (1.6 in)
12 May 1998
Jun
20.3 mm (0.8 in)
5 June 1993
Jul
3.8 mm (0.15 in)
12 July 1992
Aug
7.9 mm (0.31 in)
15 August 1984
Sep
63.5 mm (2.5 in)
20 September 2005
Oct
38.1 mm (1.5 in)
30 October 1996
Nov
59.4 mm (2.3 in)
30 November 1982
Dec
122.4 mm (4.8 in)
7 December 1992
Period of Record Coverage
1979 to 2011
Complete yearUnder 90 percent of days
33 years of record at Montebello, 1979 to 2011. 22 years have data for under 90 percent of days and are left out of rankings: 1984, 1988, 1991, 1992, 1994, 1995, 1996, 1997 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 13 complete years at Montebello, 1979 to 1999. Blue stripes are years cooler than the station's own mean of 19.5 C (67.0 F); red stripes are warmer. The coolest year was 1982, at 18.9 C (66.0 F), and the warmest was 1990, at 20.1 C (68.1 F). The strongest colour marks a difference of 0.6 C (1.1 F).
Annual mean temperature at Montebello as warming stripes, 1979 to 1999
Year
Annual mean temperature
Difference from the station mean
1979
19.5 C
+0.03 C
1980
19.4 C
-0.07 C
1981
19.7 C
+0.19 C
1982
18.9 C
-0.59 C
1983
19.7 C
+0.24 C
1985
19.2 C
-0.27 C
1986
19.8 C
+0.37 C
1987
19.3 C
-0.17 C
1989
19.6 C
+0.13 C
1990
20.1 C
+0.60 C
1993
19.7 C
+0.23 C
1998
19.0 C
-0.44 C
1999
19.3 C
-0.21 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
1979 to 2011
Yearly extremes at Montebello: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.0 C (113.0 F)
2010
40.6 C (105.1 F)
33
Coldest night (TNn)
-7.2 C (19.0 F)
2011
2.8 C (37.0 F)
33
Wettest day (Rx1day)
177.8 mm (7.0 in)
2010
59.7 mm (2.3 in)
32
Wettest five days (Rx5day)
273.5 mm (10.8 in)
1980
90.1 mm (3.5 in)
32
Longest dry spell (CDD)
333 days
2007
160 days
32
Hottest day (TXx)
The hottest day of the year at Montebello, 1979 to 2011. The record is 45.0 C (113.0 F) in 2010, marked on the chart; the median year is 40.6 C (105.1 F).
Hottest day (TXx) at Montebello by year
Year
Hottest day (TXx)
1979
42.2 C (108.0 F)
1980
38.9 C (102.0 F)
1981
41.1 C (106.0 F)
1982
41.1 C (106.0 F)
1983
40.0 C (104.0 F)
1984
42.2 C (108.0 F)
1985
42.2 C (108.0 F)
1986
37.8 C (100.0 F)
1987
41.1 C (106.0 F)
1988
43.3 C (109.9 F)
1989
40.0 C (104.0 F)
1990
40.6 C (105.1 F)
1991
41.1 C (106.0 F)
1992
38.9 C (102.0 F)
1993
37.8 C (100.0 F)
1994
40.6 C (105.1 F)
1995
38.3 C (100.9 F)
1996
42.2 C (108.0 F)
1997
38.9 C (102.0 F)
1998
41.1 C (106.0 F)
1999
40.6 C (105.1 F)
2000
40.6 C (105.1 F)
2001
37.2 C (99.0 F)
2002
41.7 C (107.1 F)
2003
38.9 C (102.0 F)
2004
40.6 C (105.1 F)
2005
39.4 C (102.9 F)
2006
40.0 C (104.0 F)
2007
43.3 C (109.9 F)
2008
39.4 C (102.9 F)
2009
41.1 C (106.0 F)
2010
45.0 C (113.0 F)
2011
36.7 C (98.1 F)
Coldest night (TNn)
The coldest night of the year at Montebello, 1979 to 2011. The record is -7.2 C (19.0 F) in 2011, marked on the chart; the median year is 2.8 C (37.0 F).
Coldest night (TNn) at Montebello by year
Year
Coldest night (TNn)
1979
-0.6 C (30.9 F)
1980
3.3 C (37.9 F)
1981
-1.1 C (30.0 F)
1982
-1.1 C (30.0 F)
1983
4.4 C (39.9 F)
1984
3.3 C (37.9 F)
1985
3.3 C (37.9 F)
1986
3.3 C (37.9 F)
1987
0.0 C (32.0 F)
1988
0.0 C (32.0 F)
1989
0.0 C (32.0 F)
1990
-1.1 C (30.0 F)
1991
3.3 C (37.9 F)
1992
2.2 C (36.0 F)
1993
3.9 C (39.0 F)
1994
3.9 C (39.0 F)
1995
5.6 C (42.1 F)
1996
3.3 C (37.9 F)
1997
2.8 C (37.0 F)
1998
1.7 C (35.1 F)
1999
3.3 C (37.9 F)
2000
4.4 C (39.9 F)
2001
0.0 C (32.0 F)
2002
1.1 C (34.0 F)
2003
3.9 C (39.0 F)
2004
2.8 C (37.0 F)
2005
5.6 C (42.1 F)
2006
2.2 C (36.0 F)
2007
0.6 C (33.1 F)
2008
3.9 C (39.0 F)
2009
-1.7 C (28.9 F)
2010
1.7 C (35.1 F)
2011
-7.2 C (19.0 F)
Wettest day (Rx1day)
The wettest day of the year at Montebello, 1979 to 2011. The record is 177.8 mm (7.0 in) in 2010, marked on the chart; the median year is 59.7 mm (2.3 in).
Wettest day (Rx1day) at Montebello by year
Year
Wettest day (Rx1day)
1979
73.7 mm (2.9 in)
1980
77.7 mm (3.1 in)
1981
48.3 mm (1.9 in)
1982
59.4 mm (2.3 in)
1983
96.5 mm (3.8 in)
1984
36.6 mm (1.4 in)
1985
36.3 mm (1.4 in)
1986
82.8 mm (3.3 in)
1987
30.5 mm (1.2 in)
1988
53.3 mm (2.1 in)
1989
20.3 mm (0.8 in)
1990
94.0 mm (3.7 in)
1991
73.4 mm (2.9 in)
1992
122.4 mm (4.8 in)
1993
124.5 mm (4.9 in)
1994
25.4 mm (1.0 in)
1995
83.1 mm (3.3 in)
1996
50.8 mm (2.0 in)
1997
71.1 mm (2.8 in)
1998
80.5 mm (3.2 in)
1999
38.1 mm (1.5 in)
2000
59.9 mm (2.4 in)
2001
90.7 mm (3.6 in)
2002
43.9 mm (1.7 in)
2003
127.0 mm (5.0 in)
2004
22.9 mm (0.9 in)
2005
160.0 mm (6.3 in)
2006
0.0 mm (0.00 in)
2007
50.8 mm (2.0 in)
2008
0.0 mm (0.00 in)
2009
50.8 mm (2.0 in)
2010
177.8 mm (7.0 in)
2011
n/a
Wettest five days (Rx5day)
The wettest five days of the year at Montebello, 1979 to 2011. The record is 273.5 mm (10.8 in) in 1980, marked on the chart; the median year is 90.1 mm (3.5 in).
Wettest five days (Rx5day) at Montebello by year
Year
Wettest five days (Rx5day)
1979
106.9 mm (4.2 in)
1980
273.5 mm (10.8 in)
1981
72.9 mm (2.9 in)
1982
97.0 mm (3.8 in)
1983
253.9 mm (10.0 in)
1984
84.9 mm (3.3 in)
1985
59.7 mm (2.4 in)
1986
130.2 mm (5.1 in)
1987
40.1 mm (1.6 in)
1988
62.2 mm (2.4 in)
1989
25.4 mm (1.0 in)
1990
113.1 mm (4.5 in)
1991
135.2 mm (5.3 in)
1992
155.4 mm (6.1 in)
1993
189.7 mm (7.5 in)
1994
48.5 mm (1.9 in)
1995
146.9 mm (5.8 in)
1996
106.2 mm (4.2 in)
1997
95.0 mm (3.7 in)
1998
200.7 mm (7.9 in)
1999
41.7 mm (1.6 in)
2000
85.1 mm (3.4 in)
2001
104.9 mm (4.1 in)
2002
79.4 mm (3.1 in)
2003
190.5 mm (7.5 in)
2004
0.0 mm (0.00 in)
2005
63.5 mm (2.5 in)
2006
0.0 mm (0.00 in)
2007
50.8 mm (2.0 in)
2008
0.0 mm (0.00 in)
2009
50.8 mm (2.0 in)
2010
177.8 mm (7.0 in)
2011
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Montebello, 1979 to 2011. The record is 333 days in 2007, marked on the chart; the median year is 160 days.
Longest dry spell (CDD) at Montebello by year
Year
Longest dry spell (CDD)
1979
204 days
1980
196 days
1981
164 days
1982
75 days
1983
108 days
1984
109 days
1985
117 days
1986
169 days
1987
85 days
1988
166 days
1989
177 days
1990
127 days
1991
71 days
1992
66 days
1993
158 days
1994
138 days
1995
72 days
1996
166 days
1997
137 days
1998
178 days
1999
159 days
2000
118 days
2001
234 days
2002
160 days
2003
180 days
2004
173 days
2005
133 days
2006
162 days
2007
333 days
2008
121 days
2009
226 days
2010
168 days
2011
n/a
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.
Download the Data
Data for Montebello standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Montebello 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.