During these months sunshine duration averages between 5 and 6 hours per day over most of the country.

Sunshine duration is highest in the southeast of the country.

An annual mean sunshine duration of 4,015 h would have been recorded in the desert city.

Average sunshine duration is 1766 hours per year.

However, this is 70% larger value than in northern half of Europe, where sunshine duration is around 1500 hours per year.

Daily sunshine duration is eight hours in December, the time of year when it is the shortest.

Khartoum is also one of the sunniest major cities in the world, with an annual sunshine duration around 3,700 hours.

Findings: association between falling sunshine duration and rising schizophrenia birth rates for males only.

This and the longest sunshine duration in Austria make it an attractive site of tourism with 100,000 stays per year.

The sky is fully clear of clouds and the sunshine duration is near the theoretical maximum.

Sunshine duration is distributed bimodally and correlates with evaporation rates.

Registered sunshine duration during the mission was about 152 days (about 27% of mission time).

The sky is usually clear above the desert and the sunshine duration is extremely high everywhere in the Sahara.

The sunshine duration is very high all over the country but especially in deserts where it could soar to over 4,000 h per year.

The sunshine duration is extremely high year-round with some 4,000 h of bright sunshine annually.

The city has up to two times less sunshine duration than other Spanish cities besides Green Spain area.

Sunshine duration is usually expressed in hours per year, or in (average) hours per day.

Lake evaporation is mainly affected by relative humidity, temperature, vapor pressure and sunshine duration.

Such high temperatures were attained despite the facts that sunshine duration and rainfall for the month were not far from normal.

An important use of sunshine duration data is to characterize the climate of sites, especially of health resorts.

In 2003, the sunshine duration was finally defined as the period during which direct solar irradiance exceeds a threshold value of 120 W/m2.

Another often used measure is percentage ratio of recorded bright sunshine duration and daylight duration in the observed period.

I1380 Isohel Curve joining points of equal sunshine duration during a specific interval of time.

Sunshine duration world map (Yearly average)

Many regions also show decreasing daily temperature range, frequently associated with an increase in low level cloudiness and hence a decline in sunshine duration.