Record envelope, standing records and threshold days for Tucson U of A #1 (USC00028817), Arizona, United States, with 31 years of record.
Key Facts for Tucson U of A #1
Tucson U of A #1 (USC00028817) is a weather station in Arizona, United States at 32.26 latitude and -111.01 longitude, 706 m (2,315 ft) above sea level.
The station reports from 1982 to 2012, 31 years of record.
1,464 records set at Tucson U of A #1 still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Tucson U of A #1 set a daily record low maximum temperature of 30.0 C (86.0 F) on 7 September 2012.
About the Station
Location: Arizona, United States, 32.26 latitude, -111.01 longitude.
Elevation: 706 m (2,315 ft).
Period of record: 1982 to 2012, 31 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 Tucson U of A #1. 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 Tucson U of A #1, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
31.1 C (88.0 F)
-7.2 C (19.0 F)
n/a
n/a
Feb
32.8 C (91.0 F)
-7.2 C (19.0 F)
n/a
n/a
Mar
36.1 C (97.0 F)
-3.3 C (26.1 F)
n/a
n/a
Apr
40.0 C (104.0 F)
0.0 C (32.0 F)
n/a
n/a
May
43.3 C (109.9 F)
3.9 C (39.0 F)
n/a
n/a
Jun
45.6 C (114.1 F)
8.3 C (46.9 F)
n/a
n/a
Jul
45.0 C (113.0 F)
15.0 C (59.0 F)
n/a
n/a
Aug
43.9 C (111.0 F)
16.1 C (61.0 F)
n/a
n/a
Sep
41.7 C (107.1 F)
10.6 C (51.1 F)
n/a
n/a
Oct
38.9 C (102.0 F)
1.7 C (35.1 F)
n/a
n/a
Nov
35.0 C (95.0 F)
-5.0 C (23.0 F)
n/a
n/a
Dec
29.4 C (84.9 F)
-7.2 C (19.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Tucson U of A #1 still stand. 2000 holds the most, with 74.
Standing records at Tucson U of A #1 by the year they were set
Year set
Standing records
1982
38
1983
59
1984
52
1985
68
1986
59
1987
57
1988
50
1989
57
1990
57
1991
47
1992
50
1993
31
1994
49
1995
50
1996
42
1997
38
1998
50
1999
55
2000
74
2001
31
2002
33
2003
62
2004
47
2005
43
2006
42
2007
49
2008
29
2009
32
2010
45
2011
42
2012
26
Wettest Day of Each Month
Oct: 77.5 mm (3.1 in)
The wettest day on record for each calendar month at Tucson U of A #1. The most was 77.5 mm (3.1 in) on 1 October 1983.
Record daily precipitation for each month at Tucson U of A #1
Month
Record daily precipitation (mm)
Date
Jan
34.8 mm (1.4 in)
30 January 1983
Feb
25.9 mm (1.0 in)
8 February 1994
Mar
20.8 mm (0.8 in)
26 March 1989
Apr
21.3 mm (0.8 in)
16 April 1988
May
10.2 mm (0.4 in)
26 May 1994
Jun
20.6 mm (0.8 in)
30 June 1984
Jul
66.8 mm (2.6 in)
7 July 1999
Aug
71.4 mm (2.8 in)
12 August 1995
Sep
33.0 mm (1.3 in)
1 September 1999
Oct
77.5 mm (3.1 in)
1 October 1983
Nov
21.1 mm (0.8 in)
18 November 1982
Dec
47.0 mm (1.9 in)
1 December 2007
Period of Record Coverage
1982 to 2012
Complete yearUnder 90 percent of days
31 years of record at Tucson U of A #1, 1982 to 2012. 4 years have data for under 90 percent of days and are left out of rankings: 1982, 2009, 2010, 2012.
Cooler than the station meanWarmer than the station mean
One stripe for each of 26 complete years at Tucson U of A #1, 1983 to 2011. Blue stripes are years cooler than the station's own mean of 20.9 C (69.7 F); red stripes are warmer. The coolest year was 1983, at 19.8 C (67.6 F), and the warmest was 2003, at 21.8 C (71.3 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at Tucson U of A #1 as warming stripes, 1983 to 2011
Year
Annual mean temperature
Difference from the station mean
1983
19.8 C
-1.17 C
1984
20.1 C
-0.87 C
1985
20.1 C
-0.88 C
1986
21.2 C
+0.27 C
1987
20.7 C
-0.20 C
1988
20.6 C
-0.32 C
1989
21.3 C
+0.39 C
1990
20.5 C
-0.43 C
1991
20.3 C
-0.60 C
1992
20.7 C
-0.22 C
1993
20.7 C
-0.27 C
1994
20.9 C
-0.08 C
1995
20.9 C
-0.05 C
1996
21.5 C
+0.59 C
1997
21.1 C
+0.21 C
1998
20.5 C
-0.45 C
1999
21.2 C
+0.23 C
2000
21.4 C
+0.48 C
2001
21.5 C
+0.53 C
2002
21.5 C
+0.58 C
2003
21.8 C
+0.89 C
2004
21.0 C
+0.03 C
2005
21.6 C
+0.68 C
2007
21.7 C
+0.75 C
2008
21.1 C
+0.16 C
2011
20.6 C
-0.32 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
1982 to 2012
Yearly extremes at Tucson U of A #1: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.6 C (114.1 F)
1990
43.9 C (111.0 F)
31
Coldest night (TNn)
-7.2 C (19.0 F)
1988
-4.4 C (24.1 F)
31
Wettest day (Rx1day)
77.5 mm (3.1 in)
1983
29.2 mm (1.1 in)
31
Wettest five days (Rx5day)
165.2 mm (6.5 in)
1983
48.5 mm (1.9 in)
31
Longest dry spell (CDD)
125 days
2002
67 days
31
Hottest day (TXx)
The hottest day of the year at Tucson U of A #1, 1982 to 2012. The record is 45.6 C (114.1 F) in 1990, marked on the chart; the median year is 43.9 C (111.0 F).
Hottest day (TXx) at Tucson U of A #1 by year
Year
Hottest day (TXx)
1982
42.2 C (108.0 F)
1983
45.0 C (113.0 F)
1984
45.0 C (113.0 F)
1985
43.3 C (109.9 F)
1986
43.9 C (111.0 F)
1987
43.3 C (109.9 F)
1988
43.9 C (111.0 F)
1989
45.0 C (113.0 F)
1990
45.6 C (114.1 F)
1991
42.8 C (109.0 F)
1992
42.8 C (109.0 F)
1993
43.3 C (109.9 F)
1994
45.6 C (114.1 F)
1995
45.0 C (113.0 F)
1996
42.2 C (108.0 F)
1997
43.9 C (111.0 F)
1998
45.0 C (113.0 F)
1999
43.3 C (109.9 F)
2000
43.3 C (109.9 F)
2001
44.4 C (111.9 F)
2002
43.9 C (111.0 F)
2003
43.9 C (111.0 F)
2004
42.8 C (109.0 F)
2005
44.4 C (111.9 F)
2006
44.4 C (111.9 F)
2007
43.9 C (111.0 F)
2008
44.4 C (111.9 F)
2009
42.8 C (109.0 F)
2010
43.3 C (109.9 F)
2011
44.4 C (111.9 F)
2012
42.2 C (108.0 F)
Coldest night (TNn)
The coldest night of the year at Tucson U of A #1, 1982 to 2012. The record is -7.2 C (19.0 F) in 1988, marked on the chart; the median year is -4.4 C (24.1 F).
Coldest night (TNn) at Tucson U of A #1 by year
Year
Coldest night (TNn)
1982
-3.3 C (26.1 F)
1983
-3.9 C (25.0 F)
1984
-3.3 C (26.1 F)
1985
-6.1 C (21.0 F)
1986
-2.2 C (28.0 F)
1987
-5.6 C (21.9 F)
1988
-7.2 C (19.0 F)
1989
-6.1 C (21.0 F)
1990
-6.1 C (21.0 F)
1991
-4.4 C (24.1 F)
1992
-3.9 C (25.0 F)
1993
-3.9 C (25.0 F)
1994
-4.4 C (24.1 F)
1995
-2.8 C (27.0 F)
1996
-5.6 C (21.9 F)
1997
-4.4 C (24.1 F)
1998
-5.0 C (23.0 F)
1999
-5.6 C (21.9 F)
2000
-5.0 C (23.0 F)
2001
-3.9 C (25.0 F)
2002
-5.0 C (23.0 F)
2003
-6.1 C (21.0 F)
2004
-5.0 C (23.0 F)
2005
-4.4 C (24.1 F)
2006
-3.9 C (25.0 F)
2007
-7.2 C (19.0 F)
2008
-4.4 C (24.1 F)
2009
-1.7 C (28.9 F)
2010
-5.0 C (23.0 F)
2011
-7.2 C (19.0 F)
2012
-2.8 C (27.0 F)
Wettest day (Rx1day)
The wettest day of the year at Tucson U of A #1, 1982 to 2012. The record is 77.5 mm (3.1 in) in 1983, marked on the chart; the median year is 29.2 mm (1.1 in).
Wettest day (Rx1day) at Tucson U of A #1 by year
Year
Wettest day (Rx1day)
1982
49.0 mm (1.9 in)
1983
77.5 mm (3.1 in)
1984
31.8 mm (1.3 in)
1985
22.4 mm (0.9 in)
1986
19.1 mm (0.8 in)
1987
25.1 mm (1.0 in)
1988
27.9 mm (1.1 in)
1989
25.7 mm (1.0 in)
1990
36.6 mm (1.4 in)
1991
28.4 mm (1.1 in)
1992
29.2 mm (1.1 in)
1993
30.5 mm (1.2 in)
1994
41.1 mm (1.6 in)
1995
71.4 mm (2.8 in)
1996
34.8 mm (1.4 in)
1997
24.9 mm (1.0 in)
1998
29.7 mm (1.2 in)
1999
66.8 mm (2.6 in)
2000
26.9 mm (1.1 in)
2001
19.8 mm (0.8 in)
2002
45.7 mm (1.8 in)
2003
26.7 mm (1.1 in)
2004
16.8 mm (0.7 in)
2005
27.9 mm (1.1 in)
2006
30.2 mm (1.2 in)
2007
47.0 mm (1.9 in)
2008
26.9 mm (1.1 in)
2009
12.2 mm (0.5 in)
2010
30.7 mm (1.2 in)
2011
31.7 mm (1.2 in)
2012
13.2 mm (0.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Tucson U of A #1, 1982 to 2012. The record is 165.2 mm (6.5 in) in 1983, marked on the chart; the median year is 48.5 mm (1.9 in).
Wettest five days (Rx5day) at Tucson U of A #1 by year
Year
Wettest five days (Rx5day)
1982
66.9 mm (2.6 in)
1983
165.2 mm (6.5 in)
1984
61.8 mm (2.4 in)
1985
38.0 mm (1.5 in)
1986
40.2 mm (1.6 in)
1987
37.8 mm (1.5 in)
1988
58.9 mm (2.3 in)
1989
23.6 mm (0.9 in)
1990
48.5 mm (1.9 in)
1991
38.3 mm (1.5 in)
1992
49.2 mm (1.9 in)
1993
74.9 mm (2.9 in)
1994
52.8 mm (2.1 in)
1995
77.8 mm (3.1 in)
1996
47.2 mm (1.9 in)
1997
34.8 mm (1.4 in)
1998
47.7 mm (1.9 in)
1999
84.8 mm (3.3 in)
2000
55.4 mm (2.2 in)
2001
35.1 mm (1.4 in)
2002
59.2 mm (2.3 in)
2003
47.8 mm (1.9 in)
2004
26.4 mm (1.0 in)
2005
60.7 mm (2.4 in)
2006
63.7 mm (2.5 in)
2007
59.4 mm (2.3 in)
2008
49.6 mm (2.0 in)
2009
35.0 mm (1.4 in)
2010
30.7 mm (1.2 in)
2011
44.3 mm (1.7 in)
2012
30.5 mm (1.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Tucson U of A #1, 1982 to 2012. The record is 125 days in 2002, marked on the chart; the median year is 67 days.
Longest dry spell (CDD) at Tucson U of A #1 by year
Year
Longest dry spell (CDD)
1982
61 days
1983
78 days
1984
89 days
1985
69 days
1986
35 days
1987
65 days
1988
42 days
1989
49 days
1990
45 days
1991
63 days
1992
74 days
1993
46 days
1994
52 days
1995
67 days
1996
102 days
1997
35 days
1998
69 days
1999
100 days
2000
76 days
2001
56 days
2002
125 days
2003
72 days
2004
95 days
2005
55 days
2006
78 days
2007
58 days
2008
77 days
2009
39 days
2010
87 days
2011
80 days
2012
62 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
25 years with a frost
Across 25 years with a frost, the median last spring frost at Tucson U of A #1 falls on 28 February and the median first autumn frost on 28 November, which leaves a median of 281 days between them.
Fitted over all years, the growing season changes by +16.3 days per decade at this station.
Frost dates and growing season at Tucson U of A #1
Measure
Median, all years
Earliest period
Recent period (1983 to 2011)
Recent against earliest
Fitted trend
Last spring frost
28 February
n/a
28 February
n/a
-10.3 days per decade
First autumn frost
28 November
n/a
28 November
n/a
+5.9 days per decade
Growing days
281 days
n/a
281 days
n/a
+16.3 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.
Download the Data
Data for Tucson U of A #1 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tucson U of A #1 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.