Tamuniyah, January to June 2000 TN2(2520m) ％ TN1(2505m) Maximum Average Minimum ％ 100 100 80 80 60 60 40 40 Relative Humidity Relative 20 20 0 0 January February March April May June January February March April May June 2000 2000 Fig. 1-35. Daily maximum, daily average, and daily minimum relative humidity in Tamniyah from January to June 2000 JabalJabel Tallan, Tallan, Januar Januaryy to toJune June 2000 2000 ％ Jabel Tallan(2100m) Maximum Average Minimum 100 80 60 40 Relative Humidity Relative 20 0 January February March April May June 2000 Fig. 1-36. Daily maximum, daily average, and daily minimum relative humidity in Jabal Tallan from January to June 2000 Tamuniyah, July to December 2000 ％ TN1(2505m) Maximum Average Minimum ％ TN2(2520m) 100 100 80 80 60 60 40 40 Relative Humidity 20 20 0 0 July August September October November December July August September October November December 2000 2000 Fig. 1-37. Daily maximum, daily average, and daily minimum relative humidity in Tamniyah from July to December 2000 JabelJabal Tallan,Tallan, JulyJuly toto December December 2000 2000 ％ Jabel Tallan(2100m) Maximum Average Minimum 100 80 60 40 Relative Humidity 20 0 July August September October November December 2000 Fig. 1-38. Daily maximum, daily average, and daily minimum relative humidity in Jabal Tallan from July to December 2000 37 Tamuniyah, January to June 2001 ％ TN1(2505m) Maximum Average Minimum ％ TN2(2520m) 100 100 80 80 60 60 40 40 Relative Humidity 20 20 0 0 January February March April May June January February March April May June 2001 2001 Fig. 1-39. Daily maximum, daily average, and daily minimum relative humidity in Tamniyah from January to June 2001 JabelJabal Tallan, JanuarJanuaryy to to June June 2001 2001 ％ Jabel Tallan(2100m) Maximum Average Minimum 100 80 60 40 Relative Humidity 20 0 January February March April May June 2001 Fig. 1-40. Daily maximum, daily average, and daily minimum relative humidity in Jabal Tallan from January to June 2001 Tamuniyah, July to August 2001 TN2(2520m) ％ Maximum Average Minimum ％ 100 TN1(2505m) 100 80 80 60 60 40 40 RelativeHumidity 20 20 0 0 July August July August 2001 2001 Fig. 1-41. Daily maximum, daily average, and daily minimum relative humidity in Tamniyah from July to August 2001 JabalJabel Tallan, Tallan, Jul Julyy to toAu Augustgust 2001 2001 ％ Jabel Tallan(2810m) Maximum Average Minimum 100 80 60 40 Relative Humidity 20 0 July August 2001 Fig. 1-42. Daily maximum, daily average, and daily minimum relative humidity in Jabal Tallan from July to August 2001 38 July to December 1999 Maximum Average Minimum ℃ Taif 50 40 30 20 Air Air Temperature 10 0 Baha Bisha 50 50 40 40 30 30 20 20 10 10 0 0 Abha 50 40 30 20 10 0 Khamis Najran 50 50 40 40 30 30 20 20 10 10 0 0 Jizan July August September October November December 50 1999 40 30 20 10 0 July August September October November December 1999 Fig. 1-43. Daily maximum, daily average, and daily minimum air temperature in seven cities around the Asir Mountains from July to December 1999 (from data of MEPA) 39 January to June 2000 Maximum Average Minimum ℃ Taif 50 40 30 20 Air Air Temperature 10 0 Baha Bisha 50 50 40 40 30 30 20 20 10 10 0 0 Abha 50 40 30 20 10 0 KhamisKhamis Mushait Najran 50 50 40 40 30 30 20 20 10 10 0 0 Jizan January February March April May June 50 1999 40 30 20 10 0 January February March April May June 1999 Fig. 1-44. Daily maximum, daily average, and daily minimum air temperature in seven cities around the Asir Mountains from January to June 2000 (from data of MEPA) 40 July to December 2000 Maximum Average Minimum ℃ Taif 50 40 30 20 Air Air Temperature 10 0 Baha Bisha 50 50 40 40 30 30 20 20 10 10 0 0 Abha 50 40 30 20 10 0 KhamisKhamis Mushait Najran 50 50 40 40 30 30 20 20 10 10 0 0 Jizan July August September October November December 50 2000 40 30 20 10 0 July August September October November December 2000 Fig. 1-45. Daily maximum, daily average, and daily minimum air temperature in seven cities around the Asir Mountains from July to December 2000 (from data of MEPA) 41 January to June 2001 Maximum Average Minimum ℃ Taif 50 40 30 20 Air Air Temperature 10 0 Baha Bisha 50 50 40 40 30 30 20 20 10 10 0 0 Abha 50 40 30 20 10 0 KhamisKhamis Mushait Najran 50 50 40 40 30 30 20 20 10 10 0 0 Jizan January February March April May June 50 2001 40 30 20 10 0 January February March April May June 2001 Fig. 1-46. Daily maximum, daily average, and daily minimum air temperature in seven cities around the Asir Mountains from January to April 2001 (from data of MEPA) 42 July to December 1999 ％ Taif Maximum Average Minimum 100 80 60 40 Relative Humidity 20 0 Baha Bisha 100 100 80 80 60 60 40 40 20 20 0 0 Abha 100 80 60 40 20 0 KhamisKhamis Mushait Najran 100 100 80 80 60 60 40 40 20 20 0 0 Jizan July August September October November December 100 1999 80 60 40 20 0 July August September October November December 1999 Fig. 1-47. Daily maximum, daily average, and daily minimum relative humidity in seven cities around the Asir Mountains from July to December 1999 (from data of MEPA) 43 January to June 2000 ％ Taif Maximum Average Minimum 100 80 60 40 Relative Humidity 20 0 Baha Bisha 100 100 80 80 60 60 40 40 20 20 0 0 Abha 100 80 60 40 20 0 Khamis Mushait Khamis Najran 100 100 80 80 60 60 40 40 20 20 0 0 Jizan January February March April May June 100 2000 80 60 40 20 0 January February March April May June 2000 Fig. 1-48. Daily maximum, daily average, and daily minimum relative humidity in seven cities around the Asir Mountains from January to June 2000 (from data of MEPA) 44 July to December 2000 ％ Taif Maximum Average Minimum 100 80 60 40 Relative Humidity 20 0 Baha Bisha 100 100 80 80 60 60 40 40 20 20 0 0 Abha 100 80 60 40 20 0 KhamisKhamis Mushait Najran 100 100 80 80 60 60 40 40 20 20 0 0 Jizan July August September October November December 100 2000 80 60 40 20 0 July August September October November December 2000 Fig. 1-49. Daily maximum, daily average, and daily minimum relative humidity in seven cities around the Asir Mountains from July to December 2000 (from data of MEPA) 45 January to June 2001 ％ Taif Maximum Average Minimum 100 80 60 40 Relative Humidity 20 0 Baha Bisha 100 100 80 80 60 60 40 40 20 20 0 0 Abha 100 80 60 40 20 0 Khamis Mushait Khamis Najran 100 100 80 80 60 60 40 40 20 20 0 0 Jizan January February March April May June 100 2001 80 60 40 20 0 January February March April May June 2001 Fig. 1-50. Daily maximum, daily average, and daily minimum relative humidity in seven cities around the Asir Mountains from January to April 2001 (from data of MEPA) 46 Monthly Average Air Temperature ℃ Taif 50 40 30 20 Air Air Temperature 10 0 Baha Bisha 50 50 40 40 30 30 20 20 10 10 0 0 Abha 50 40 30 20 10 0 KhamisKhamis Mushait Najran 50 50 40 40 30 30 20 20 10 10 0 0 Jizan 78 80 82 84 86 88 90 92 94 96 98 '00 50 Year 40 30 20 10 0 78 80 82 84 86 88 90 92 94 96 98 '00 Year Fig. 1-51. Monthly average of air temperature in seven cities from January 1978 to April 2001 (from data of MEPA) 47 ℃ Taif Baha Abha 35 35 35 -2 -2 -2 Y = 22.24+4.505･10 X Y = 21.68+6.45･10 X Y = 17.94+3.664･10 X 2 2 R = 0.252 R = 0.182 2 30 30 30 R = 0.265 25 25 25 Air Temperature 20 20 20 15 15 15 0 5 10 15 20 25 0 5 10 15 20 25 0 5 10 15 20 25 Khamis Mushait Jizan 35 35 -2 -2 Y = 18.11+8.879･10 X Y = 29.93+1.473･10 X 2 -2 2 R = 7.29･10 30 R = 0.675 30 25 25 20 20 15 15 0 5 10 15 20 25 0 5 10 15 20 25 Bisha Najiran 35 35 -2 -2 Y = 24.62+6.748･10 X Y = 24.43+7.271･10 X 2 2 R = 0.29 30 R = 0.25 30 25 25 20 20 15 15 0 5 10 15 20 25 0 5 10 15 20 25 Years from 1978 Years from 1978 Fig. 1-52. Change of annual average air temperature in seven cities from 1978 to 2001 (calculated from data of MEPA) 48 Monthly Average Relative Humidity ％ Taif 100 80 60 40 Relative Humidity 20 0 Baha Bisha 100 100 80 80 60 60 40 40 20 20 0 0 Abha 100 80 60 40 20 0 KhamisKhamis Mushait Najran 100 100 80 80 60 60 40 40 20 20 0 0 Jizan 78 80 82 84 86 88 90 92 94 96 98 '00 100 Year 80 60 40 20 0 78 80 82 84 86 88 90 92 94 96 98 '00 Year Fig.