Daily records
Page built 2026-10-19
Data as of 2025-12-31
Search
Built 2026-10-19 (19 October 2026)

Riyadh Obs. (O.A.P. Threshold Days by Year (SA000040438)

13 fixed thresholds counted per year at Riyadh Obs. (O.A.P. (SA000040438): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Riyadh Obs. (O.A.P. Thresholds

  • Riyadh Obs. (O.A.P.: days with a maximum temperature at or above 30 C (86 F) in 19 years, most in 1979 with 243.
  • Riyadh Obs. (O.A.P.: days with a maximum temperature at or above 35 C (95 F) in 19 years, most in 1979 with 187.
  • Riyadh Obs. (O.A.P.: days with a maximum temperature at or above 40 C (104 F) in 19 years, most in 1987 with 148.
  • Riyadh Obs. (O.A.P.: days with a maximum temperature at or above 45 C (113 F) in 19 years, most in 2000 with 42.
  • 13 fixed thresholds have at least one qualifying day at Riyadh Obs. (O.A.P..
19 years with a qualifying day
Days at or above 30 C (86 F) per year at Riyadh Obs. (O.A.P. Days per year at Riyadh Obs. (O.A.P. with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 243 in 1979. 01002003001978: 2301979: 2431985: 2361986: 2241987: 2291988: 2341989: 2291990: 2291991: 2281992: 2131993: 2301994: 2311995: 2211996: 2131997: 2031998: 2432000: 2102001: 2272007: 2211978198519871989199119931995199720002007
Days per year at Riyadh Obs. (O.A.P. with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 243 in 1979.
Days at or above 30 C (86 F) per year at Riyadh Obs. (O.A.P.
YearDaysDecade average
1978230236.5
1979243236.5
1985236230.4
1986224230.4
1987229230.4
1988234230.4
1989229230.4
1990229223.4
1991228223.4
1992213223.4
1993230223.4
1994231223.4
1995221223.4
1996213223.4
1997203223.4
1998243223.4
2000210219.3
2001227219.3
2007221219.3
First to last qualifying date each year at Riyadh Obs. (O.A.P. For each year, a bar from the first to the last day at Riyadh Obs. (O.A.P. meeting 30 C (86 F). 1978: 6 March 1978 to 2 December 19781979: 8 February 1979 to 17 November 19791985: 13 March 1985 to 27 November 19851986: 1 March 1986 to 30 November 19861987: 9 February 1987 to 28 November 19871988: 1 March 1988 to 17 December 19881989: 28 February 1989 to 25 November 19891990: 7 March 1990 to 15 December 19901991: 26 February 1991 to 12 December 19911992: 24 February 1992 to 22 November 19921993: 28 February 1993 to 27 November 19931994: 30 January 1994 to 24 November 19941995: 8 March 1995 to 10 November 19951996: 10 February 1996 to 7 November 19961997: 21 February 1997 to 11 November 19971998: 6 February 1998 to 25 November 19982000: 8 March 2000 to 4 November 20002001: 2 March 2001 to 14 December 20012007: 25 February 2007 to 22 November 20071978198619891992199519982007JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Riyadh Obs. (O.A.P. meeting 30 C (86 F).
First to last qualifying date each year at Riyadh Obs. (O.A.P.
YearFirst dateLast date
19781978-03-061978-12-02
19791979-02-081979-11-17
19851985-03-131985-11-27
19861986-03-011986-11-30
19871987-02-091987-11-28
19881988-03-011988-12-17
19891989-02-281989-11-25
19901990-03-071990-12-15
19911991-02-261991-12-12
19921992-02-241992-11-22
19931993-02-281993-11-27
19941994-01-301994-11-24
19951995-03-081995-11-10
19961996-02-101996-11-07
19971997-02-211997-11-11
19981998-02-061998-11-25
20002000-03-082000-11-04
20012001-03-022001-12-14
20072007-02-252007-11-22

Every Fixed Threshold

Fixed thresholds at Riyadh Obs. (O.A.P.
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days192431979221
35 C (95 F): Days191871979167
40 C (104 F): Days191481987121
45 C (113 F): Days1942200016
90 F (32.2 C): Days192201979193
100 F (37.8 C): Days191711987149
110 F (43.3 C): Days1979199846
0 C (32 F): Frost days (min2319923
20 C (68 F): Tropical nights (min172101994189
25 C (77 F): Days with min171641987142
10 mm (0.39 in): Days with 10 mm or more rain15819863
25 mm (0.98 in): Days with 25 mm or more rain6419951
50 mm (1.97 in): Days with 50 mm or more rain1119951

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1978.

Download the Data

  • 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).