Riyadh weather in August

Name: Riyadh
Address: SA

In August, Riyadh has daytime highs averaging 43 °C, nights around 27 °C, with 0 wet days. Figures are 1991–2020 climate normals.

42.5°C Average high
27.4°C Average low
0days Wet days
under 1mm Rainfall
13h Daylight

Daily temperatures through August

Daily high Daily low Day of month on the horizontal axis. Highs peak at 43.1 °C and lows bottom out at 26.5 °C.

How August develops

Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.

Days	Avg high	Avg low
1–10 August	42.8 °C	27.9 °C
11–20 August	42.5 °C	27.5 °C
21–31 August	42.3 °C	27.0 °C

Chance of a wet day (over 1 mm) by date in August. Wettest date over the 30 years: August 1, at 0 %. Single dates are noisy — read the shape, not the spikes.

What to expect

Measure	Typical August	Share of the month
Days above 25 °C	31 of 31	100 %
Days above 30 °C	31 of 31	100 %
Days below 0 °C	0 of 31	0 %
Days with more than 1 mm rain	0 of 31	0 %

Conditions in August

Measure	Average
Mean temperature	36 °C
Record high (1991–2020)	46 °C
Record low (1991–2020)	21 °C
Relative humidity	13 %
Wind speed	22 km/h
Cloud cover	14 %

Where Riyadh ranks in August

Ranking	Position	Value
The warmest places in South America in August	4th of 50	43 °C
The driest places in South America in August	5th of 50	0.02 mm
The driest places in Asia in August	14th of 50	0.02 mm
The warmest places in Asia in August	27th of 50	43 °C
The warmest places in the world in August	27th of 50	43 °C
The driest places in the world in August	33rd of 50	0.02 mm

August compared with the months around it

Month	Avg high	Rainfall	Cloud
June	41.6 °C	under 1 mm	6 %
July	42.6 °C	0 mm	15 %
August	42.5 °C	under 1 mm	14 %
September	39.5 °C	0 mm	6 %
October	34.0 °C	1 mm	10 %

See all twelve months for Riyadh

August is the 2nd warmest month here.
It is the 3rd driest month of the year.
It ranks 4th for least cloud cover.
Days last about 13 hours from sunrise to sunset.
It rains on 0 of 31 days — 0 % of the month.
Nights are about 15 °C cooler than the middle of the day.
The hottest August day on record since 1991 reached 46 °C, 3.9 °C above the usual daytime high.

QuestionsAugust in Riyadh, answered

How warm is Riyadh in August?

Daily highs average 43 °C and nights fall to about 27 °C, a spread of 15 °C between afternoon and dawn. That makes August the 2nd warmest month of the year here.

Does it rain much in Riyadh in August?

August averages under 1 mm of rain, spread over about 0 of the 31 days — 0 % of the month. Cloud cover averages 14 % of the sky.

How long are the days in August?

Riyadh averages 13 hours between sunrise and sunset in August. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.