1931 — Page 518

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SUMMARY OF OBSERVATIONS AT FIXED HOURS

STATION: Royal Observatory, Hong Kong

YEAR: 1931

Latitude: 22° 18′ N

Longitude: 114° 10′ 19′′ E

Temperature Scale used below: Fahrenheit

Instrument Exposure

Instrument Height above M.S.L. Height above Ground Site
Barometer (Cistern) 109 ft 4 ft 103 ft
Rotating Thermometers (Bulbs) — 60 ins 103 ft
Rain-gauge (Rim) 150 ft 18 ins 103 ft
Anemometer (Head) — 45 ft 103 ft

Hours of Observation (Standard Time, 120th Meridian)

Observation Time
I 7h 00m
II 13h 00m
III 21h 00m

Monthly Summary Table

Month Mean Pressure at M.S.L. (mb) Excess above Normal (mb) Dry Bulb (°F) Wet Bulb (°F) Depression (°F) Vapor Pressure (mb) Humidity (%) Cloud Amount 7h (0–10) Cloud Amount 13h (0–10) Cloud Amount 21h (0–10) Clear Sky Days Overcast Sky Days Wind Force 4–7 Days Strong Wind ≥8 Days Calm Days N NE E SE S SW W NW Sunshine Hours
January 1019.0 -0.6 64.7 60.1 9.0 62.6 61.0 6.19 6.59 6.34 6.99 7.32 7.03 2.2 ... ... ... ... ... ... ... ... ...
February 1016.9 -1.6 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
March 1015.9 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
April 1012.5 +1.0 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
May 1008.5 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
June 1005.6 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
July 1006.9 -0.6 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
August 1000.8 -3.9 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
September 1008.2 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
October 1014.6 -0.2 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
November 1016.4 +0.9 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
December 1019.8 +0.2 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
Year (Means) 1012.1 ... 70.8 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 2420.7

Totals: 24,207 (sunshine hours)

Note: On a day of clear sky the mean cloud amount at hours of observation < 20; on an overcast day > 80.

The sign — indicates zero.

(Zb 2)

516

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SUMMARY OF OBSERVATIONS AT FIXED HOURS STATION: Royal Observatory, Hong Kong YEAR: 1931 Latitude: 22° 18′ N Longitude: 114° 10′ 19′′ E Temperature Scale used below: Fahrenheit Instrument Exposure Instrument Height above M.S.L. Height above Ground Site Barometer (Cistern) 109 ft 4 ft 103 ft Rotating Thermometers (Bulbs) — 60 ins 103 ft Rain-gauge (Rim) 150 ft 18 ins 103 ft Anemometer (Head) — 45 ft 103 ft Hours of Observation (Standard Time, 120th Meridian) Observation Time I 7h 00m II 13h 00m III 21h 00m Monthly Summary Table Month Mean Pressure at M.S.L. (mb) Excess above Normal (mb) Dry Bulb (°F) Wet Bulb (°F) Depression (°F) Vapor Pressure (mb) Humidity (%) Cloud Amount 7h (0–10) Cloud Amount 13h (0–10) Cloud Amount 21h (0–10) Clear Sky Days Overcast Sky Days Wind Force 4–7 Days Strong Wind ≥8 Days Calm Days N NE E SE S SW W NW Sunshine Hours January 1019.0 -0.6 64.7 60.1 9.0 62.6 61.0 6.19 6.59 6.34 6.99 7.32 7.03 2.2 ... ... ... ... ... ... ... ... ... February 1016.9 -1.6 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... March 1015.9 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... April 1012.5 +1.0 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... May 1008.5 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... June 1005.6 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... July 1006.9 -0.6 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... August 1000.8 -3.9 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... September 1008.2 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... October 1014.6 -0.2 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... November 1016.4 +0.9 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... December 1019.8 +0.2 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... Year (Means) 1012.1 ... 70.8 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 2420.7 Totals: 24,207 (sunshine hours) Note: On a day of clear sky the mean cloud amount at hours of observation &lt; 20; on an overcast day &gt; 80. The sign — indicates zero. (Zb 2) 516
Baseline (Original)
Temperature Scule used below..... Fahrenheit. SUMMARY OF OBSERVATIONS AT FIXED HOURS. STATION: Royal ObservATORY, Hong Kong. YEAR 1931. Lat. 22° 18′ N. Long, 14° 10′ 19′′ E. Barometer. Rotating Thermometers, Rain-gauge. Anemometer. Cistern 109 ft. 4 fl. Site 103 ft. Bulbs 60 ins. I Site 103 ft. Head 150 ft. Rim 18 ins, Hend 45 ft. Amount of Cloud. Number of Number of 0-100. Wind. Number of Hours of Days of Days with (24 observatious daily) I 7h 00m Hours of Observations, II 13 00- III 21 (0- Standard Time of Height above M.S.L....... 120th Meridian. Height above ground *** Mean Pressure. |;24 observations daily) Temperature, Humidity, 1931. At Meurt Nea Level. Excess above Normal. Depression of Wet-Bulb, Vapon Pressure. Percentage. I 11 III [I III II [1] I II I II III Clear Sky. Overcast Sky. Wind Force (4-7). Strong Wind &#039;8 and above. Calm. N. NE. E. S.E. S. SW. W, NW millibur m.b. ຕ О ✩ &#039; → . 。 m.b. | m.b. m.b. % % %% hrs. hrs.rs, hrs, hrs.hrs.rs. hrs. hrs. January, February. 1019:0 1016-9 -0&#039;6 1.6 March, 1015&#039;9 April, 1012 5 1.0- 38.8 647 6019 605 626 610 619 659 63&#039;4 699 732 703 2.2 May,... 1008&#039;5 June,... 1005.6 July...... 1006:9 -06 +2&#039;3 August,............. 1000-8 3.9 September, October,... November,...) December,..... 1008&#039;z 10146 1016&#039;4 1019&#039;8 +口°2 -0°2 +09 36 64 39 140 2436 26 158 159 159 87 161 162 4 335 33 15.6 22-8 89 22.4 23.0 4&#039;0 757 791 76°32&#039;5 44 24 269 276 275 89 804 835 810 36 36 4T 29&#039;9 30&#039;3 29.8 85 51.8 85-2818 37 6&#039;5 42 31′1 3017, 304 85 810 | 854 | 82-1 2&#039;9 | 6′2 | 3·8 | 34 | 34 | 30&#039;3 797 840 802 38 64 | 471 28-8 296 28.9 85 6-6| 18-8 715 781 739 65 101 1977 20*5 71 16.6 173 71 673 749 69°56′0 10·6 6·4 163 611 664 62746 7051 141 || 149 || 146 | 74 147 149 79 67 78 71 81 56 98 82 83 75 89 2.2 82 89 9+ 89 90 78 83 75 83 71 77 77 66 бо 71 44 65 + 58 ARO AS 61 66 N 99 97 28 86 I 90 26 I NNN 23 30 13876 404 47 3 7 30 7 22 32 63 112 321 80 28 18 16 36 14 42 536 26 J 45 +3 90 92 26 83 84 26 NIN 27 10 35 534 28 64 40 5 3 21 27 409 22 + 109 از 20 84 81 24 22 23 10 219 28 195 14 32 1 I 6, IC - 77 8 16 89 81 266 160 40 7 71 69 15 N 21 27 36 52 313 65 28 49 143 31 68 68 2 17 57 63 57 210 35 95 52 51 49 46 8 *મ 11 255 171 258 29 31 3 6 8 37 33 3 19 56 126 120 59 65 3 15 23 269 59 32 181 133 355 35 13 13 48 16 3 2 2 Year. Totals,...... Means, 1012&#039;1 24,207 70-8 752 719 38 63 41 22&#039;1 225 225 82 73 8176 72 • On a day of clear sky the mean cloud amount at hours of observation &lt; 20; on an overcast day &gt; 80, 3 253 +18 912 891 3917 466 748 -4 The sign indicates zero. 665 525 218 ( Zb 2 ) 516
2026-07-14 21:22:40 · Baseline
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Temperature Scule used below..... Fahrenheit.

SUMMARY OF OBSERVATIONS AT FIXED HOURS.

STATION: Royal ObservATORY, Hong Kong.

YEAR 1931.

Lat. 22° 18′ N. Long, 14° 10′ 19′′ E.

Barometer.

Rotating Thermometers,

Rain-gauge.

Anemometer.

Cistern 109 ft.

4 fl.

Site 103 ft.

Bulbs 60 ins.

I

Site 103 ft.

Head 150 ft.

Rim 18 ins,

Hend 45 ft.

Amount of Cloud. Number of Number of

0-100.

Wind.

Number of Hours of

Days of

Days

with

(24 observatious daily)

I 7h 00m

Hours of Observations,

II 13 00-

III 21 (0-

Standard Time

of

Height above M.S.L.......

120th Meridian.

Height above ground

***

Mean Pressure. |;24 observations daily)

Temperature,

Humidity,

1931.

At Meurt Nea Level.

Excess above Normal.

Depression of Wet-Bulb,

Vapon Pressure.

Percentage.

I 11 III

[I

III

II [1]

I

II

I II

III

Clear Sky.

Overcast Sky.

Wind Force

(4-7).

Strong Wind

'8 and above.

Calm.

N. NE. E. S.E.

S. SW. W, NW

millibur

m.b.

ຕ

О

✩

'

→

.

。

m.b. | m.b. m.b.

%

%

%%

hrs. hrs.rs, hrs, hrs.hrs.rs.

hrs. hrs.

January, February.

1019:0 1016-9

-0'6

  • 1.6

March,

1015'9

April,

1012 5

1.0-

38.8 647 6019 605 626 610 619 659 63'4 699 732 703

2.2

May,...

1008'5

June,...

1005.6

July......

1006:9

-06

+2'3

August,.............

1000-8

  • 3.9

September,

October,...

November,...) December,.....

1008'z 10146 1016'4 1019'8 +口°2

-0°2

+09

36 64 39 140 2436 26 158 159 159 87

161 162

4 335 33 15.6

22-8 89 22.4 23.0 4'0 757 791 76°32'5 44 24 269 276 275 89 804 835 810 36 36 4T 29'9 30'3 29.8 85 51.8 85-2818 37 6'5 42 31′1 3017, 304 85 810 | 854 | 82-1 2'9 | 6′2 | 3·8 | 34 | 34 | 30'3 797 840 802 38 64 | 471 28-8 296 28.9 85

6-6| 18-8 715 781 739 65 101

1977 20*5

71 16.6 173 71 673 749 69°56′0 10·6 6·4 163 611 664 62746 7051 141 || 149 || 146 | 74

147 149 79

67

78

71

81

56

98

82

83 75

89

2.2

82

89

9+

89

90

78

83

75

83

71 77

77

66

бо

71

44

65

+

58 ARO AS

61

66

N

99 97

28

86

I 90

26

I

NNN

23 30 13876

404 47 3

7

30

7

22

32

63 112

321

80

28

18

16

36

14 42

536

26

J

45 +3

90

92

26

83

84

26

NIN

27

10

35

534

28

64

40

5

3

21

27

409

22

+ 109

از

20

84

81

24

22

23

10

219

28 195 14

32

1 I

6,

IC

-

77

8

16

89

81 266 160

40

7

71

69

15

N

21

27 36

52

313

65

28

49 143

31

68 68 2

17

57 63 57

210

35

95

52

51 49 46

8

*મ

11 255 171

258

29

31 3

6

8

37 33

3

19

56 126 120

59 65

3 15

23

269 59 32 181 133 355 35

13 13 48

16

3

2

2

Year.

Totals,......

Means,

1012'1

24,207

70-8 752 719 38 63 41 22'1 225 225 82 73

8176

72

• On a day of clear sky the mean cloud amount at hours of observation < 20; on an overcast day > 80,

3 253 +18 912 891 3917 466 748

-4

The sign indicates zero.

665 525 218

( Zb 2 )

516

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