32
(c.)-CLIMATE.
The principal features of the weather in 1920 were :-
(a.) Barometric pressure below normal from the beginning of May to the beginning of August.
(b.) Rainfall much above normal in May and July.
Barometric pressure was considerably below normal in May, June, July, November and December, and moderately above in January. The mean pressure for the year at station level was 29.814ins. as against 29.842ins. in 1919 and 29.843ins. for the past 37 years. The highest pressure was 30.374ins. on January 4th as against 30.398ins. in 1919 and 30.509ins. for the past 37 years. The lowest pressure was 29.208ins. on July 19th as against 29.287ins. in 1919 and 28.735ins. for the past 37 years.
The temperature of the air was moderately below normal in April and considerably above normal in November and December. The mean temperature for the year was 72°.0 as against 72°.2 in 1919 and 71°.8 for the past 37 years. The highest temperature was 93°.1 on July 25th as against 92°.2 in 1919 and 97°.0 for the past 37 years. The lowest temperature was 45°.1 on January 5th as against 39°.4 in 1919 and 32°.0 for the past 37 years.
The rainfall was considerably above normal in May, July and November. The total for the year was 107.880ins. as against 76.140ins. in 1919, and 84.276ins. for the past 37 years. The greatest fall in one civil day was 8.235ins. on July 19th and the greatest in one hour was 1.435ins. between 8.30 p.m. and 9.30 p.m. on September 12th.
The wind velocity was considerably below normal in January and October, and moderately below in February, July and September. It was moderately above normal in May and July. The mean velocity for the year was 12.0 m.p.h. as against 11.4 m.p.h. in 1919 and 12.7 m.p.h. for the past 37 years. The maximum velocity for one hour as recorded by the Beckley Anemograph was 51 miles at 2 p.m. on July 31st as against 60 miles in 1919 and 108 for the past 37 years. The maximum squall velocity, as recorded by the Dines-Baxendell Anemograph, was at the rate of 61 m.p.h. at 10h. 58m. p.m. on July 30th as against 84 m.p.h. in 1919 and 105 m.p.h. for the past 11 years.
The climate of Hongkong is similar in its broad features to that of Kowloon and the New Territories, but at the higher levels, from 1,400 to 1,800 feet above sea level the temperature is usually from 3° to 6° lower than at the Observatory, Kowloon. The humidity is usually greater than in Kowloon and approaches saturation for several days at a time during March and April when mist is very prevalent. In summer the city of Victoria, and the rising terraces behind it, derive little or no benefit from the SW monsoon, being sheltered by steep hills from SE to SW. In winter it is exposed to the NE monsoon, which occasionally blows along the harbour through Lyemun Pass with considerable violence. On the other hand the South-west side of the Island is protected
32
(c.)-CLIMATE.
The principal features of the weather in 1920 were :-
(a.) Barometric pressure below normal from the beginning of May to the beginning of August.
(b.) Rainfall much above normal in May and July.
Barometric pressure was considerably below normal in May, June, July, November and December, and moderately above in January. The mean pressure for the year at station level was 29.814ins. as against 29 842ins. in 1919 and 29 843ins. for the past 37 years. The highest pressure was 30 374ius. on January 4th as against 30 398ins. in 1919 and 30:509ins. for the past 37 years. The lowest pressure was 29-208ins. on July 19th as against 29.287ins. in 1919 and 28-735ins. for the past 37 years.
The temperature of the air was moderately below normal in April and considerably above normal in November and Decem- ber. The mean temperature for the year was 72°0 as against 72°.2 in 1919 and 71°8 for the past 37 years. The highest temperature was 93°1 on July 25th as against 92°2 in 1919 and 97°0 for the past 37 years. The lowest temperature was 45° I on January 5th as against 39°4 in 1919 and 32°0 for the past 37 years.
The rainfall was considerably above normal in May, July and November. The total for the year was 107 880ius. as against 76 140ins. in 1919, and 84.276ins. for the past 37 years. The greatest fall in one civil day was 8-235ins. on July 19th and the greatest in one hour was 1-435ius. between 8.30 p.m. and 9.30 p.m. on September 12th.
The wind velocity was considerably below normal in January and October, and moderately below in February, July and Septem- ber. It was moderately above normal in May and July. The mean velocity for the year was 120 m.p.h. as against 114 m.p.h. in 1919 and 12.7 m.p.h. for the past 37 years. The maximum velocity for one hour as recorded by the Beckley Anemograph was 51 miles at 2 p.m. on July 31st as against 60 miles in 1919 and 108 for the past 37 years. The maximum squall velocity, as recorded by the Dines-Baxendell Anemograph, was at the rate of 61 m.p.h. at 10h. 58m. p.m. on July 30th as against 84 m.p.h. in 1919 and 105 m.p.h. for the past 11 years.
The climate of Hongkong is similar in its broad features to that of Kowloon and the New Territories, but at the higher levels, from 1,400 to 1,800 feet above sea level the temperature is usually from 3° to 6° lower than at the Observatory, Kowloon. The humidity is usually greater than in Kowloon and approaches saturation for several days at a time during March and April when mist is very prevalent. In summer the city of Victoria, and the rising terraces behind it, derive little or no benefit from the SW monsoon, being sheltered by steep hills from SE to SW. In winter it is exposed to the NE monsoon, which occasionally blows along the harbour through Lyemun Pass with considerable violence. On the other hand the South-west side of the Island is protected
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