Mahoney's table

1. MAHONEY’S TABLE

2. Climatology is the study of climate, scientifically 
defined as weather conditions averaged over a 
period of time.
 
This modern field of study is 
regarded as a branch of the atmospheric 
sciences and a subfield of physical geography, 
which is one of the earth sciences. Climatology 
now includes aspects of oceanography 
and biogeochemistry.  

4. LocationBaghdad, Iraq
Longitude44° 24´ E.
Latitude33° 20´ N.
Altitude34 m
JFMAMJ J A SO ND HighAMT
Monthly mean max.
1618.52229364143.543.5403424.517.543.523.5
Monthly mean min.
45.5914.52023.525.524.5211610.554 39.5
Monthly mean range
121313141617.5181819181412.5LowAMR
Air temperature : °C

5. Humidity group:1 If average RH: below 30 %
2 30-50 %
3 50-70%
4 Above 70 %
Monthly mean max. a.m.
877874684634323238506789
Monthly mean min. p.m.
504135271813121315213951
Average
68.559.554.547.53223.52223.526.535.55370
Humidity group
3 3 3 22111 1 233

6. Rainfall, mm
242528157000032226150Total
Wind, prevailing
NW
.
NW
.
NW
.
NW
.
NW
.
NW
.
NW. NW
.
NW
.
NW
.
NW.NW.
Wind, secondary
SE.SE.N N N N N & WN N N N SE
JFMAM J J ASOND
AMT
over 20 °C
AMT
15-20 °C
AMT
below 15 °C
Comfort limits Day NightDayNightDay Night
Humidity groups126-3417-2523-3214-2321-30 12-21
225-3117-2422-3014-2220-27 12-20
323-2917-2321-2814-2119-26 12-19
422-2717-2120-2514-2018-24 12-18

7. JFM AM J J A SQN D
Monthly mean max.
1618.52229364143.543.5403424.517.523.5AMT
Day comfort: upper
292929313134343434312929
lower
232323252526262626252323
Monthly mean min.
45.5914.52023.525.524.5211610.55
Night comfort: upper

232323242425252525242323
lower
171717171717171717171717
Thermal stress: day
CCCO HH H HHHO C
night
CCCCOO H OOCC C

8. Applicable when:
Meaning: Indicator
Thermal
stressRainfall
Humidity
Group
Monthly mean
range
Day Night
Air movement essential H1 H 4
H 2.3 Less than 10
Air movement desirable H2 O 4
Rain protection necessaryH3 Over
200 mm
Thermal capacity
necessary
A1 1,2,3 More than 10
Out-door sleeping
desirable
A2 H 1,2
H O 1,2 More than 10
Protection from cold A3 C
INDICATORS

9. Humid: H1 0
H2 0Total
H3 0
Arid: A1√√√√√√√√√√√√ 12
A2 √√√√√ 5
A3 √√√ √ 4
JFMAMJJASOND

10. Indicator Totals from Table 2
H1H2H3A1A2A3
Layout
0-10 1Orientation north and south
(long axis east-west)11,12 5-12
0-4 2Compact courtyard planning
Spacing
11,12 3Open spacing for breeze
penetration
2-10 4As 3, but protection form hot
and cold wind
0,1 5Compact lay-out of estates
Table 3: Recommended Specifications

11. Indicator Totals from Table 2
H1H2H3A1A2A3
0 0 0 12 5 4
Layout
0-10 1Orientation north and south
(long axis east-west)11,12 5-12
0-4√2Compact courtyard planning
Spacing
11,12 3Open spacing for breeze
penetration
2-10 4As 3, but protection form hot
and cold wind
0,1 5Compact lay-out of estates
Table 3: Recommended Specifications

12. Air movement
3-12 6Rooms single banked, permanent
provision for air movement
1,2 0-5
6-12 7Double banked rooms, temporary
provision for air movement
0
2-12
0,1 8No air movement requirement
Openings
0,1 0 9Large openings, 40-80%
11,12 0,1 10Very small openings, 10-20%
Any other conditions 11Medium openings, 20-40%
Indicator Totals from Table 2
H1H2H3A1A2A3

13. Air movement
3-12 6Rooms single banked, permanent
provision for air movement
1,2 0-5
6-12
√
7Double banked rooms, temporary
provision for air movement
0
2-12
0,1 8No air movement requirement
Openings
0,1 0 9Large openings, 40-80%
11,12 0,1 √10Very small openings, 10-20%
Any other conditions 11Medium openings, 20-40%
Indicator Totals from Table 2
H1H2H3A1A2A3
0 0 0 12 5 4

14. Walls
0-2 12Light walls, short time-lag
3-12 √13Heavy external and internal
walls
Roofs
0-5 14Light, insulated roofs
6-12 √15Heavy roofs, over 8 h time-lag
Out-door sleeping
2-12 √16Space for out-door sleeping
required
Indicator Totals from Table 2
H1H2H3A1A2A3
0 0 0 12 5 4
Rain protection
3-12 17Protection from heavy rain
necessary