Time period for instantaneous

measurements

Air Velocity

Time period for continues measurements

Air Temperature

Relative Humidity

Period

Modern City

+

No. of Outdoors

Old Sana’a

+

No. of Outdoors

2009/12/20

-

17/01/2010

2009/12/07

-

2010/02/07

Winter

Tourism City

Sheraton

3 Outdoors

Al-Jala’a

4 Outdoors