London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Bermondsey 1915
Report on the sanitary condition of the Borough of Bermondsey for the year 1915
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TABLE VII.—METEOROLOGICAL TABLE FOR LONDON, 1915. (Deduced from Observations at Greenwich under the Superintendence of the Astronomer-Royal.)
| 1915. | Barometer. | Air Temperature. | Hygrometer. | Earth Temperature | Bright Sunshine. | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean Pressure at Station Level.* (Bar. 150 ft. above M.S.L.) | Mean of | Mean of A and B. | Difference from Average .† | Absolute Maximum and Minimum. | Mean of Observations at 9 a.m. and 9 p.m.* | At 1 ft. depth. | At 3ft. 2in. depth. | Daily Mean. | Difference from Average .† | Per cent, of Possible. | ||||||||
| Maximum. | Minimum. | Maximum. | Day of Month. | Minimum. | Day of Month. | Dry Bulb. | Depression of Wet Bulb. | Vapour Pressure. | Humidity. | |||||||||
| M.B. | °F. | °F. | °F. | °F. | °F. | °F. | °F | °F. | M.B. | % | °F. | °F. | Hrs. | Hrs. | % | |||
| January | 997.9 | 43.6 | 35.7 | 39.7 | +1.1 | 53 | 13 | 22 | 23 | 39.3 | 1.5 | 7.2 | 88 | – | 43.3 | 1.13 | -0.22 | 13 |
| February | 997.9 | 46.4 | 35.0 | 40.7 | +1.1 | 52 | 4 | 26 | 25 | 39.9 | 1.8 | 7.1 | 86 | – | 42.1 | 2.75 | +0.54 | 28 |
| March | 1010.2 | 48.1 | 35.7 | 41.9 | 0.0 | 59 | 23 | 26 | 29 | 41.4 | 2.4 | 7.2 | 82 | – | 42.6 | 2.87 | —0.42 | 24 |
| April | 1012.7 | 55.4 | 38.2 | 46.8 | —0.4 | 72 | 30 | 29 | 18 | 46.9 | 3.8 | 8.1 | 75 | – | 44.6 | 5.33 | +0.06 | 39 |
| May | 1011.5 | 63.9 | 43.4 | 53.7 | +0.6 | 76 | 26 | 34 | 31 | 53.5 | 4.0 | 10.4 | 75 | – | 50.9 | 6.90 | +0.48 | 45 |
| June | 1011.9 | 70.6 | 49.0 | 50.8 | +0.6 | 87 | 8 | 37 | 1 | 58.7 | 4.3 | 12.5 | 76 | – | 57.5 | 7.27 | +0.60 | 44 |
| July | 1007.3 | 71.4 | 52.7 | 62.0 | —0.4 | 87 | 4 | 45 | 13 | 61.0 | 4.0 | 13.9 | 78 | – | 60.5 | 6.42 | -0.42 | 40 |
| August | 1010.9 | 71.4 | 53.8 | 62.6 | +1.1 | 77 | 1 | 44 | 30 | 61.0 | 3.4 | 14.5 | 81 | – | 61.6 | 5.23 | —1.22 | 36 |
| September | 1010.8 | 67.7 | 48.2 | 58.0 | +0.9 | 79 | 17 | 37 | 30 | 57.1 | 3.3 | 12.6 | 80 | – | 59.7 | 6.20 | +0.97 | 49 |
| October | 1011.7 | 56.8 | 42.6 | 49.7 | —0.4 | 68 | 12 | 32 | 30 | 48.6 | 1.7 | 10.2 | 89 | – | 55.0 | 2.29 | -0.81 | 21 |
| November | 1008.4 | 44.8 | 33.8 | 39.3 | -4.2 | 58 | 12 | 23 | 27 | 38.7 | 1.6 | 6.9 | 87 | – | 47.8 | 1.83 | +0.10 | 21 |
| December | 998.6 | 48.3 | 39.3 | 43.8 | +3.6 | 56 | 10 | 29 | 13 | 44.1 | 1.8 | 8.5 | 87 | – | 44.9 | 1.16 | +0.06 | 15 |
| Year | 1007.5 | 57.4 | 42.3 | 49.9 | +0.4 | – | – | – | – | 49.2 | 2.8 | 10.0 | 82 | – | 50.9 | 4.12 | —0.02 | 34 |
* The hours of observation are 9 a.m. and 9 p.m. local time.
The averages used are obtained from observations extending over 65 years for rain, 75 years for temperature, and 18 years for sunshine.
Pressure is expressed in millibars (1000 m.b. = 29.531 mercury inches). Wind-force, —Beaufort Scale (0-12) is used. The summary is obtained from the
records of a cup anemograph having 5 inch cups and 15 inch arms. The factor used is 3. Winds above 37 miles per hour are reckoned as gales, and wands
between 21 and 37 miles per hour as moderate or strong winds.