An in-depth trend analysis of a database consisting of dry bulb temperatures measured at Beer Sheva, Israel during the time interval between August 1988 and December 2021 is presented. Beer Sheva is located at the northern edge of the semi-arid Negev region of Israel. Trend analyses were applied first to the mean diurnal (06:00-18:00), nocturnal (18:00-06:00) and daily (24 hour) time intervals. Positive trends were detected for all months of the year with the exception of April and December for both diurnal and nocturnal time intervals and October in the case of the diurnal time interval. The positive trends were in the range of 1.13 and 0.33°C/decade. The magnitude of the positive trends for the nocturnal time interval were greater than that of the diurnal for six months of the year and essentially equal during the month of November. In the case of the daily time interval positive trends were found throughout the year with the exception of April. The positive trends were in the range of 1.05 and 0.41°C/decade.

The second phase of the study was a trend analyses performed on the daily maximum, daily minimum and daily temperature range (DTR). The daily maximum temperature exhibited positive trends only during January, February, March, July and August, whereas the daily minimum temperature trends were positive throughout the year. In addition, only during January and February were the maximum daily temperature trends greater than the corresponding minimum temperatures; during March they were essentially the same. The DTR was found to possess negative trends from May through October. The highest negative trend, -0.96°C/decade, is in June and the lowest negative trend, -0.48°C/decade, occurs in October.