Climate averages 1991–2020

Najrān weather
in July.

A very hot, very dry month: the warmest and the joint 5th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 37.1°C Daytime mean, July

Average low 21.5°C Night-time mean, July

Rainfall 1.6 mm fewer than one day with ≥1 mm

Daylight 13 h Sunrise to sunset, per day

July is a very hot month in Najrān: daytime highs average 37.1°C and nights cool to about 21.5°C. By daytime temperature it is the warmest month of the year.

Expect about 1.6 mm of rain on fewer than one day, which makes July a very dry month (the joint 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 04 min on an average July day.

The nearest other city in this atlas is Şabyā (164 km away). In July its highs average 36.7°C, about as warm as Najrān, with 25 mm of rain.

Among the 35 cities listed in Saudi Arabia, Najrān ranks 24th of 35 for the warmest July highs and 26th of 35 for the driest July (rainfall, lowest first). The mean July high of those 35 cities is 37.9°C; Najrān is 0.8°C cooler than that mean.

From July to August, average highs fall by 0.4°C to 36.7°C, and monthly rainfall rises from 1.6 mm to 2.4 mm.

The annual picture

July in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Najrān climate table

1991–2020

Monthly climate averages for Najrān, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	25.7°C9.6°C	9.6°C	1.6	0.5	11.211 h
February	28.1°C11.8°C	11.8°C	1.9	0.5	11.612 h
March	30.3°C15.1°C	15.1°C	9.5	2.0	12.012 h
April	32.2°C18.0°C	18.0°C	13	3.6	12.513 h
May	34.7°C20.5°C	20.5°C	4.3	1.0	12.913 h
June	36.8°C20.4°C	20.4°C	1.4	0.1	13.213 h
July, selected	37.1°C21.5°C	21.5°C	1.6	0.4	13.113 h
August	36.7°C21.3°C	21.3°C	2.4	0.5	12.713 h
September	34.4°C19.7°C	19.7°C	0.1	0.0	12.212 h
October	29.8°C16.3°C	16.3°C	3.3	0.5	11.812 h
November	27.0°C12.9°C	12.9°C	0.8	0.2	11.311 h
December	25.4°C9.7°C	9.7°C	0.2	0.0	11.111 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Compare places

July in nearby cities

Distance from Najrān

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Najrān) is explained once on the Najrān year overview and on the Sources, method and limits page.