Mean temperature of each month in the year.
London and Malvern.
| Jan. | Feb. | Mar. | Apr. | May. | Jun. | Jul. | Aug. | Sept. | Oct. | Nov. | Dec. | |
| London | 39.2 | 42.4 | 42.7 | 49.1 | 55.2 | 63.5 | 67.0 | 65.3 | 60.7 | 52.2 | 45.4 | 41.8 |
| Malvern | 38.6 | 42.7 | 42.4 | 47.7 | 51.6 | 59.0 | 60.5 | 60.0 | 56.6 | 50.2 | 43.7 | 42.7 |
Mean temperature of the seasons.[1]
| Spring. | Summer. | Autumn. | Winter. | |
| London | 49.0 | 65.2 | 52.7 | 41.1 |
| Malvern | 47.0 | 59.8 | 50.1 | 41.3 |
Mean temperature of the year.
| London | 52.0[2] |
| Malvern | 49.6 |
- ↑ Spring including the months of March, April, and May.—Summer—June, July, August—and so on.
In the report on Meteorology, in the 1st vol. of the Reports of the British Association, the author states, "That the errors arising from solar and terrestrial radiation, in determining the temperature of a place, have not been sufficiently attended to. It is surprising at what a distance a sensible portion of heat is conveyed from soil, walls, or even from grass, illuminated by the sun. The maxima of temperature are thus, generally, too great; and from the near contact in which thermometers are generally placed with large difficultly conducting masses, such as walls. &c. the temperature during the night is kept up, and the minima are thus also too high."
The effect mentioned here may be supposed peculiarly liable to occur in London, where the copious and varied reflections of heat from the pavement, buildings, &c. in the bright days of summer, must considerably increase the maximum of the thermometer; and we find, from the above tables, that the mean maximum of summer is, in London, 5.4°, and in autumn 2.6° higher than in the elevated situation in which the village of Great Malvern stands. On the other hand, the mean temperature of winter, in the two places, does not differ much; and the mean of the spring months, gives a difference of only 2°.
- ↑ The mean temperature of London, derived from the daily maxima
