58 SCIENTIFIC SURVEY OF NOTTINGHAM AND DISTRICT 



of University College. More recently, Mr. Arnold B. Tinn of Nottingham 

 has presented to the library of the Royal Meteorological Society an 

 exhaustive collection of climatological data relating to the city, extending 

 over a period of twenty years and including many items not usually 

 available. Mention should also be made of the chart illustrating the 

 principal meteorological conditions on each day of the year in Notting- 

 ham prepared annually by the City Engineer and Surveyor. This docu- 

 ment, with its clearly printed details is of inestimable value in the study 

 of local conditions. 



Temperature 



Temperatures in Nottinghamshire are affected by the inland situation 

 of the county and by its location eastward of the Pennines, for both 

 circumstances prevent a full development of westerly maritime influences. 

 The absence of mountains within the county itself and the comparative 

 evenness of relief make for a marked uniformity of temperature con- 

 ditions. The whole area has a mean temperature of shghtly under 38° F. 

 for January, whilst in summer there is little more than one degree of 

 difference between the extreme north of the county (July mean 61° F.) 

 and the extreme south (July mean 62.1° F.), a distance of over 50 miles. 



In detail, too, there is a close similarity between the average monthly 

 mid-temperatures of the four stations given below. 



Mean Monthly Mid-Temperatures (1881-1915) in F° 



Jan. Feb. Mar. Apr. Maj" June July Aug. Sep. Oct. Nov. Dec. Year 



Nottiugliain (Treut Laiie) 82 ft. 



37-6 38-9 41-3 46-0 51-8 57-8 (31-0 59-8 55-7 485 42-8 39-1 48-4 



Nottingham (Castle) 192 ft. (1901-30) 



38-9 39-1 41-8 45-7 52-4 56-7 605 596 556 494 42-0 396 48-4 



Hodsock Pviorv 56 ft. 



37-4 390 41-6 45-8 515 57-3 60-4 59-5 554 48-5 42-8 38-6 48-2 



Bel voir Castle 259 ft. 



37-5 38-8 41-0 45-6 51-4 57-3 607 59-7 59-7 48-4 428 38-8 48-2 



Belvoir Castle, of course, lies beyond the county boundary in 

 Leicestershire. This similarity occurs in spite of the differences in altitude 

 between these stations and the only appreciable difference is that in 

 summer as might be expected, the city is slightly warmer than the stations 

 situated in the open country. During the two months June and July 

 the mean temperatures for Nottingham (Trent Lane) are 0.5° and 0.6° 

 respectively above those for Hodsock Priory, whilst for all the remaining 

 months of the year the difference is less than one-half of a degree. 



The moderating influence of the sea is naturally not felt so much as in 

 regions nearer the coast, consequently the mean annual range of tem- 

 perature (about 22° F. for Nottingham and 22.9° F. for Hodsock) is 

 considerable. This is exceeded, however, in many districts of eastern 

 England, e.g. Cambridge, where the range is 24° F. Throughout the 

 county and adjoining regions January is the coldest month with a mean 

 of 37.5° F. and July the warmest with a mean of 60.5° F. August is 

 but one degree cooler than July. The relative weakness of westerly in- 



