29
Barometric pressure was considerably above normal in January and considerably below in July. Departures from normal in other months were small. The mean pressure for the year at station level was 29.847ins as against 29.845ins in 1917, and 29.844ins for the past 35 years. The highest pressure was 30.391ins on January 8th as against 30.494ins in 1917 and 30.509ins for the past 35 years. The lowest pressure was 29.108ins on August 15th as against 29.078ins in 1917 and 28.735ins for the past 35 years.
The monthly departures of temperature from normal were small, except in January when the mean temperature was no less than 5°8 below normal. The mean temperature for the year was 71°.2 as against 71°.0 in 1917 and 71°.8 for the past 35 years. The highest temperature was 91°.2 on July 14th as against 90°.8 in 1917 and 97°.0 for the past 35 years. The lowest temperature was 42°.1 on January 9th as against 38°.8 in 1917 and 32°.0 for the past 35 years.
The rainfall was considerably below the average from January to May and considerably above the average in June, August and September. The total for the year was 101.605ins, the greatest on record since 1894, when it was 104.25 inches. The greatest fall in one civil day was 7.395 inches on August 3rd and the greatest in one hour was 2.420ins between 1 a.m. and 2 a.m. on September 21st.
The wind velocity was considerably below normal in January, April, June (the lowest on record) and October. In August it was moderately above normal, owing to the passage of two typhoons. The mean velocity for the year was 11.6 m.p.h. as against 11.2 m.p.h. in 1917 and 12.7 m.p.h. for the past 35 years. The maximum velocity for one hour as recorded by the Beckley Anemograph was 63 miles at 6h on August 15th as against 63 miles in 1917 and 108 m.p.h. for the past 35 years. The maximum squall velocity, as recorded by the Dines Baxendell Anemograph, was at the rate of 94 m.p.h. at 6h 10 a.m. on August 15th as against 93 m.p.h. in 1917 and 105 m.p.h. for the past 9 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 from the NE monsoon in winter and enjoys the benefit of the SW monsoon in summer.
29
Barometric pressure was considerably above normal in January and considerably below in July. Departures from normal in other months were small. The mean pressure for the year at station level was 29.847ims as against 29.845ins in 1917, and 29.844s for the past 35 years. The highest pressure was 30.391ins on January 8th as against 30-494 in 1917 and 30*509ius. for the past 35 years. The lowest pressure was 29.108ius on August 15th as against 29-078ins. in 1917 and 28-735 for the past 35 years.
The monthly departures of temperature from normal were small, except in January when the mean temperature was no less than 58 below normal. The mean temperature for the year was 71°2 as against 71°0 in 1917 and 71°-8 for the past 35 years. The highest temperature was 91° 2 on July 14th as against 90°-8 in 1917 and 970 for the past 35 years. The lowest temperature was 42° 1 on January 9th as against 38°-8 in 1917 and 320 for the past 35
years.
The rainfall was considerably below the average from January to May and considerably above the average in June, August and September. The total for the year was 101-605ins the greatest on record since 1894, when it was 104.25 inches. The greatest fall in one civil day was 7.395 inches on August 3rd and the greatest in one hour was 2:420 ins. between 1 a.m. and 2 a.m. September 21st.
on
The wind velocity was considerably below normal in January, April, June (the lowest on record) and October. In August it was moderately above normal, owing to the passage of two typhoons. The mean velocity for the year was 116 m.p.h. as against 11.2 m.p.h. in 1917 and 12.7 m.p.h. for the past 35 years. The maximum velocity for one hour as recorded by the Beckley Anemograph was 63 miles at 6h on August 15th as against 63 miles in 1917 and 108 for the past 35 years. The maximum squall velocity, as recorded by the Dines Baxendell Anemograph, was at the rate of 94 m.p.h. at 6h 10 a.m. on August 15th as against 93 m.p.h. in 1917 and 105 m.p.h. for the past 9 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 satura- tion 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 Lyeman Pass with considerable violence. On the other hand the South-west side of the Island is protected from the NE monsoon in winter and enjoys the benefit of the SW mon- soon in summer.
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