Record envelope, standing records and threshold days for Riyadh Obs. (O.A.P. (SA000040438), Saudi Arabia, with 42 years of record.
Key Facts for Riyadh Obs. (O.A.P.
Riyadh Obs. (O.A.P. (SA000040438) is a weather station in Saudi Arabia at 24.70 latitude and 46.73 longitude, 620 m (2,034 ft) above sea level.
The station reports from 1973 to 2014, 42 years of record.
1,464 records set at Riyadh Obs. (O.A.P. still stand.
Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
Riyadh Obs. (O.A.P. tied a daily record high maximum temperature of 47.0 C (116.6 F) on 12 August 2011.
About the Station
Location: Saudi Arabia, 24.70 latitude, 46.73 longitude.
Elevation: 620 m (2,034 ft).
Period of record: 1973 to 2014, 42 years.
Eligible elements: tmax, tmin.
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 Riyadh Obs. (O.A.P.. 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 Riyadh Obs. (O.A.P., with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
31.5 C (88.7 F)
-2.2 C (28.0 F)
n/a
n/a
Feb
34.8 C (94.6 F)
0.5 C (32.9 F)
n/a
n/a
Mar
38.0 C (100.4 F)
4.5 C (40.1 F)
n/a
n/a
Apr
42.0 C (107.6 F)
10.0 C (50.0 F)
n/a
n/a
May
45.1 C (113.2 F)
16.0 C (60.8 F)
n/a
n/a
Jun
47.2 C (117.0 F)
20.0 C (68.0 F)
n/a
n/a
Jul
48.0 C (118.4 F)
22.0 C (71.6 F)
n/a
n/a
Aug
48.0 C (118.4 F)
21.0 C (69.8 F)
n/a
n/a
Sep
45.0 C (113.0 F)
16.1 C (61.0 F)
n/a
n/a
Oct
41.0 C (105.8 F)
12.0 C (53.6 F)
n/a
n/a
Nov
36.0 C (96.8 F)
7.0 C (44.6 F)
n/a
n/a
Dec
31.0 C (87.8 F)
1.4 C (34.5 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Riyadh Obs. (O.A.P. still stand. 1989 holds the most, with 71.
Standing records at Riyadh Obs. (O.A.P. by the year they were set
Year set
Standing records
1973
63
1974
40
1975
23
1976
50
1977
28
1978
60
1979
34
1980
33
1981
28
1982
41
1983
26
1984
30
1985
40
1986
25
1987
70
1988
25
1989
71
1990
28
1991
46
1992
51
1993
41
1994
52
1995
35
1996
25
1997
39
1998
59
1999
26
2000
33
2001
29
2002
19
2003
27
2004
21
2005
17
2006
34
2007
30
2008
45
2009
36
2010
62
2011
22
All-Time Record Progression
1 new records
1 all-time records were set at Riyadh Obs. (O.A.P. between 17 January 2008 and 17 January 2008. Each dot is a new record.
When Riyadh Obs. (O.A.P. set new all-time records
Date
Kind
Detail
2008-01-17
Record low minimum temperature
Record low minimum temperature -2.2 C (28.0 F)
Wettest Day of Each Month
Feb: 70.1 mm (2.8 in)
The wettest day on record for each calendar month at Riyadh Obs. (O.A.P.. The most was 70.1 mm (2.8 in) on 1 February 2009.
Record daily precipitation for each month at Riyadh Obs. (O.A.P.
Month
Record daily precipitation (mm)
Date
Jan
26.0 mm (1.0 in)
12 January 1993
Feb
70.1 mm (2.8 in)
1 February 2009
Mar
63.2 mm (2.5 in)
18 March 2009
Apr
59.9 mm (2.4 in)
23 April 2005
May
59.9 mm (2.4 in)
24 May 2010
Jun
63.2 mm (2.5 in)
1 June 2009
Jul
59.9 mm (2.4 in)
16 July 2009
Aug
6.0 mm (0.24 in)
28 August 1998
Sep
0.0 mm (0.00 in)
1 September 1978
Oct
5.0 mm (0.20 in)
23 October 1997
Nov
46.0 mm (1.8 in)
2 November 1997
Dec
28.0 mm (1.1 in)
20 December 1995
Period of Record Coverage
1973 to 2011
Complete yearUnder 90 percent of days
39 years of record at Riyadh Obs. (O.A.P., 1973 to 2011. 20 years have data for under 90 percent of days and are left out of rankings: 1973, 1974, 1975, 1976, 1977, 1980, 1981, 1982 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 21 complete years at Riyadh Obs. (O.A.P., 1978 to 2010. Blue stripes are years cooler than the station's own mean of 26.5 C (79.7 F); red stripes are warmer. The coolest year was 1992, at 25.0 C (76.9 F), and the warmest was 2010, at 28.3 C (82.9 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Riyadh Obs. (O.A.P. as warming stripes, 1978 to 2010
Year
Annual mean temperature
Difference from the station mean
1978
25.9 C
-0.60 C
1979
26.8 C
+0.28 C
1980
26.5 C
+0.04 C
1985
26.4 C
-0.07 C
1986
26.0 C
-0.48 C
1987
27.4 C
+0.89 C
1988
26.9 C
+0.43 C
1989
25.3 C
-1.22 C
1990
26.0 C
-0.49 C
1991
26.2 C
-0.31 C
1992
25.0 C
-1.54 C
1993
26.0 C
-0.48 C
1994
26.5 C
+0.04 C
1995
26.0 C
-0.53 C
1996
26.7 C
+0.19 C
1997
26.0 C
-0.47 C
1998
27.4 C
+0.89 C
2000
27.1 C
+0.57 C
2001
27.2 C
+0.68 C
2002
26.9 C
+0.41 C
2010
28.3 C
+1.77 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
1973 to 2014
Yearly extremes at Riyadh Obs. (O.A.P.: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
48.0 C (118.4 F)
1987
46.0 C (114.8 F)
39
Coldest night (TNn)
-2.2 C (28.0 F)
2008
2.9 C (37.2 F)
40
Wettest day (Rx1day)
70.1 mm (2.8 in)
2009
21.1 mm (0.8 in)
25
Wettest five days (Rx5day)
98.0 mm (3.9 in)
1995
26.5 mm (1.0 in)
16
Longest dry spell (CDD)
245 days
1988
143 days
21
Hottest day (TXx)
The hottest day of the year at Riyadh Obs. (O.A.P., 1973 to 2014. The record is 48.0 C (118.4 F) in 1987, marked on the chart; the median year is 46.0 C (114.8 F).
Hottest day (TXx) at Riyadh Obs. (O.A.P. by year
Year
Hottest day (TXx)
1973
45.0 C (113.0 F)
1974
45.0 C (113.0 F)
1975
45.0 C (113.0 F)
1976
44.0 C (111.2 F)
1977
46.0 C (114.8 F)
1978
46.2 C (115.2 F)
1979
46.2 C (115.2 F)
1980
46.0 C (114.8 F)
1981
46.0 C (114.8 F)
1982
44.3 C (111.7 F)
1983
45.6 C (114.1 F)
1984
44.4 C (111.9 F)
1985
46.8 C (116.2 F)
1986
47.0 C (116.6 F)
1987
48.0 C (118.4 F)
1988
46.2 C (115.2 F)
1989
46.0 C (114.8 F)
1990
46.0 C (114.8 F)
1991
46.0 C (114.8 F)
1992
45.0 C (113.0 F)
1993
45.8 C (114.4 F)
1994
45.8 C (114.4 F)
1995
46.0 C (114.8 F)
1996
46.0 C (114.8 F)
1997
46.5 C (115.7 F)
1998
47.8 C (118.0 F)
1999
46.5 C (115.7 F)
2000
47.0 C (116.6 F)
2001
47.0 C (116.6 F)
2002
47.0 C (116.6 F)
2003
47.0 C (116.6 F)
2004
46.0 C (114.8 F)
2005
47.0 C (116.6 F)
2006
46.0 C (114.8 F)
2007
47.6 C (117.7 F)
2008
46.4 C (115.5 F)
2009
46.0 C (114.8 F)
2010
47.6 C (117.7 F)
2011
48.0 C (118.4 F)
2014
n/a
Coldest night (TNn)
The coldest night of the year at Riyadh Obs. (O.A.P., 1973 to 2014. The record is -2.2 C (28.0 F) in 2008, marked on the chart; the median year is 2.9 C (37.2 F).
Coldest night (TNn) at Riyadh Obs. (O.A.P. by year
Year
Coldest night (TNn)
1973
-1.0 C (30.2 F)
1974
0.0 C (32.0 F)
1975
1.0 C (33.8 F)
1976
5.0 C (41.0 F)
1977
1.0 C (33.8 F)
1978
3.0 C (37.4 F)
1979
2.8 C (37.0 F)
1980
4.0 C (39.2 F)
1981
2.0 C (35.6 F)
1982
3.0 C (37.4 F)
1983
3.6 C (38.5 F)
1984
4.8 C (40.6 F)
1985
3.0 C (37.4 F)
1986
2.2 C (36.0 F)
1987
4.0 C (39.2 F)
1988
2.0 C (35.6 F)
1989
-0.5 C (31.1 F)
1990
1.4 C (34.5 F)
1991
2.6 C (36.7 F)
1992
0.0 C (32.0 F)
1993
0.9 C (33.6 F)
1994
2.2 C (36.0 F)
1995
4.0 C (39.2 F)
1996
6.0 C (42.8 F)
1997
4.7 C (40.5 F)
1998
2.0 C (35.6 F)
1999
5.0 C (41.0 F)
2000
4.0 C (39.2 F)
2001
2.0 C (35.6 F)
2002
4.0 C (39.2 F)
2003
4.0 C (39.2 F)
2004
4.0 C (39.2 F)
2005
3.0 C (37.4 F)
2006
2.5 C (36.5 F)
2007
1.2 C (34.2 F)
2008
-2.2 C (28.0 F)
2009
2.0 C (35.6 F)
2010
3.5 C (38.3 F)
2011
7.0 C (44.6 F)
2014
20.6 C (69.1 F)
Wettest day (Rx1day)
The wettest day of the year at Riyadh Obs. (O.A.P., 1973 to 2014. The record is 70.1 mm (2.8 in) in 2009, marked on the chart; the median year is 21.1 mm (0.8 in).
Wettest day (Rx1day) at Riyadh Obs. (O.A.P. by year
Year
Wettest day (Rx1day)
1973
n/a
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
3.0 mm (0.12 in)
1979
13.0 mm (0.5 in)
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
12.0 mm (0.5 in)
1986
30.0 mm (1.2 in)
1987
14.0 mm (0.6 in)
1988
24.0 mm (0.9 in)
1989
29.0 mm (1.1 in)
1990
15.0 mm (0.6 in)
1991
13.0 mm (0.5 in)
1992
13.0 mm (0.5 in)
1993
30.0 mm (1.2 in)
1994
17.0 mm (0.7 in)
1995
53.0 mm (2.1 in)
1996
44.0 mm (1.7 in)
1997
46.0 mm (1.8 in)
1998
19.0 mm (0.7 in)
1999
n/a
2000
50.0 mm (2.0 in)
2001
n/a
2002
n/a
2003
59.9 mm (2.4 in)
2004
n/a
2005
59.9 mm (2.4 in)
2006
21.1 mm (0.8 in)
2007
17.0 mm (0.7 in)
2008
10.9 mm (0.4 in)
2009
70.1 mm (2.8 in)
2010
59.9 mm (2.4 in)
2011
11.9 mm (0.5 in)
2014
n/a
Wettest five days (Rx5day)
The wettest five days of the year at Riyadh Obs. (O.A.P., 1973 to 2014. The record is 98.0 mm (3.9 in) in 1995, marked on the chart; the median year is 26.5 mm (1.0 in).
Wettest five days (Rx5day) at Riyadh Obs. (O.A.P. by year
Year
Wettest five days (Rx5day)
1973
n/a
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
5.0 mm (0.20 in)
1979
15.0 mm (0.6 in)
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
14.0 mm (0.6 in)
1986
66.0 mm (2.6 in)
1987
36.0 mm (1.4 in)
1988
28.0 mm (1.1 in)
1989
38.0 mm (1.5 in)
1990
15.0 mm (0.6 in)
1991
25.0 mm (1.0 in)
1992
21.0 mm (0.8 in)
1993
41.0 mm (1.6 in)
1994
15.0 mm (0.6 in)
1995
98.0 mm (3.9 in)
1996
74.0 mm (2.9 in)
1997
29.0 mm (1.1 in)
1998
24.0 mm (0.9 in)
1999
n/a
2000
n/a
2001
n/a
2002
n/a
2003
n/a
2004
n/a
2005
n/a
2006
n/a
2007
n/a
2008
n/a
2009
n/a
2010
n/a
2011
n/a
2014
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Riyadh Obs. (O.A.P., 1973 to 2014. The record is 245 days in 1988, marked on the chart; the median year is 143 days.
Longest dry spell (CDD) at Riyadh Obs. (O.A.P. by year
Year
Longest dry spell (CDD)
1973
n/a
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
125 days
1979
147 days
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
87 days
1986
218 days
1987
146 days
1988
245 days
1989
221 days
1990
241 days
1991
234 days
1992
203 days
1993
117 days
1994
208 days
1995
127 days
1996
179 days
1997
143 days
1998
105 days
1999
n/a
2000
n/a
2001
n/a
2002
n/a
2003
1 day
2004
n/a
2005
1 day
2006
2 days
2007
n/a
2008
n/a
2009
1 day
2010
1 day
2011
n/a
2014
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 Riyadh Obs. (O.A.P. standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Riyadh Obs. (O.A.P. 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.