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
Holborn 1921
Report for the year 1921 of the Medical Officer of Health
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Meteorology of London, 1921.
(Deduced from observations at Greenwich under the superintendence of the Astronomer Royal.)
| 1921. | Air Temperature. | Bright Sunshine. | Rain and other forms of Precipitation. | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mean of— | Mean of A. & B. | Difference from Normal.* | Daily Mean. | Difference from Normal.* | Per cent. of possible. | Total Fall. | Difference from Normal.* | ||
| Maximum.A | Minimum. B | ||||||||
| °F | °F | °F | °F | hrs. | hrs. | % | m.m. | m.m. | |
| January | 50.0 | 41.0 | 45.5 | + 7.0 | 0.94 | -0.30 | 11 | 44 | + 1 |
| February | 47.8 | 35.0 | 41.4 | + 1.6 | 2.l8 | + 0.14 | 22 | 3 | -37 |
| March | 55.2 | 38.0 | 46.6 | + 4.1 | 4.46 | +1.06 | 38 | 31 | -13 |
| April | 59.3 | 38.7 | 49.0 | + 1.4 | 6.73 | + 1.71 | 49 | 30 | -7 |
| May | 66.8 | 43.9 | 55.3 | + 1.3 | 7.54 | + 1.07 | 49 | 32 | -12 |
| June | 71.8 | 48.8 | 60.3 | + 0.4 | 7.39 | + 0.69 | 45 | 11 | -40 |
| July | 81.6 | 55.4 | 68.5 | + 5.0 | 9.21 | + 2.71 | 57 | 4 | -53 |
| August | 74.2 | 53.4 | 63.8 | + 1.2 | 5.77 | -0.43 | 40 | 17 | -39 |
| September | 71.5 | 49.3 | 60.4 | + 2.4 | 5.81 | +0.86 | 46 | 46 | + 1 |
| October | 67.8 | 47.0 | 57.4 | + 7.2 | 4.98 | + 1.86 | 47 | 20 | -44 |
| November | 45.3 | 34.6 | 39.9 | -4.1 | 1.79 | + 0.07 | 20 | 50 | -8 |
| December | 49. | 39.5 | 44.3 | + 4.1 | 0.92 | -0.14 | 12 | 30 | -27 |
| Year | 61.7 | 43.7 | 52.7 | + 2.6 | 4.81 | + 0.76 | 39 | 318 or | -278 orab't |
| 12.40 ins. | -10.84 ins. | ||||||||
*he normals used are obtained from observations extending over 35 years (1881-1915).