51 
Decade. 
I. 
II. 
III. 
lY 
Y. 
Max. 
54*6 
53-1 
55 0 
54 7 
54 5 
Min. 
40 4 
40-3 
42*4 
41*1 
40 85 
Yariation of Max. 
4-0 2 
-1*3 
+ 0*6 
-fO'3 
+0*1 
„ Min. 
-0 6 
-0 75 
4-1 4 
4-0 1 
-0-2 
Possibly the min 
readings 
in the ; 
forties 
are too low, but the 
notorious warmth in the sixties quite justifies the excess then. 
EAINFALL. 
[Observations at Walmgate, to December 184^ ; at Bootham, to December 1873 ; 
afterwards at tise Y.P.S. grounds. Up to 1873, a five-incli gauge was used, 
probably the same. The official gauge at the Y'.P.S. is eight inches.] 
This has ranged from 17 42 inches in 1887, to -39 85 inches Range and 
o ^ mean. 
in 1872, the mean for the 50 years being 25 005, falling on 
170’6 days. The Days with Eain* (falls of 0*01 inches or over) 
vary from 117 in 1855, to 222 in 1877, or, practically, from 
one to tN\o days out of every three The total falls, in these 
years, were 19 30 and 33'27 inches. 
The tables on p. 53 give the chief points as to monthly falls Table, 
and Days with Rain. 
This table and plates YI. and YIa show clearly that the 
wet months are July to October ; that June and November are 
neither wet nor dry ; that December to May are dry and that 
April is (by a minute fraction) the driest month in the year, 
both as to Rainfall and days with Rain. 
The mean number of Days with Rain, for a thirty-day Da3's with Rain 
month, is 14-2, and the variation from month to month is 
about 25 per cent,, ranging from 12*58 in Alay and June to 
16*45 and 16 64 in October and November. December (14*65) 
is the only other month above the average, the rest being very 
close to the average. 
The mean Rainfall per Day with Rain varies much more, 
and gives a difference in favour of June to October, even 
more pronounced than the Rainfall, since the months from 
May to August have the fewest days with Rain. 
The extremes of monthly^ records are also of interest. The 
greatest falls show a decided tendency towards a summer 
maximum and winter minimum, December excepted. It gives 
* A distinction is here drawn between “ Rainy Days,” which implies much wet, 
and “ Days with Rain,” which may mean but 10 minutes of downpour. Plates 
VI. — X. exhibit the figures and relations upon which this section is based. 
