FIFTEENTH ORDINARY MEETING. 213 
especially, very nearly the extremes of the day. The average daily 
range in January furnishes an interesting contrast with the range in 
the same month at Toronto and Hamilton. 
April at Pelee is almost as cold as at Toronto, and is more 
than 3° colder than at Windsor, thirty miles further north. The 
effect of the cold lake water is shown in the fact that the highest 
maximum in this month was 82.°9, (April 1881) while in Pelee it was 
but 68°. Yet the last frost of the season is several weeks later at 
Windsor than in Pelee, where it occurs about the iniddle of April, In 
May, Pelee almost regains the normal temperature of the districts 
on the neighboring mainland : temperatures above 90° are recorded 
and frosts are known only in exceptional years. 
The summers are hot and steady. In only one June in four years 
was a lower reading than 50° recorded. In July and August 
only once in the same period was there a lower reading than 60°. 
The daily range in summer is much greater than in winter but still 
not half so great as at most stations on the mainland of Ontario. The 
range between 7 a.m. and 2 p.m. for June is 8°.4, July 8°.6, Aug. 
7°.5. The daily range above the mean temperature is in summer 
twice as high, as the range below the mean, the nights maintaining 
an almost even temperature of about 70° in July and August, while 
the day temperature rises in July to at least 80°. This daily maxi- 
mum is not so high as that of some parts of the Ottawa Valley, 
and is much below the daily maximum of Hamilton and Windsor, 
where however the night temperatures fall considerably lower than at 
Pelee. 
Intensely tropical weather frequently prevails for days together, 
when, though the mercury does not rise any higher than on the main- 
land, it does not fall at night below 80°. In the steaming atmosphere 
of this shallow lake such days must be very oppressive. The follow- 
ing are instances from the records : 
7am. 2 p.m. 9 p.m. 
Uae espa teres) os cleric er ale a OO. 
INU EA e ve Ata eee Sore aa. | DOL meee ww OOe 
DCMi parts! laid Oo shi aes UP GORDeaeprt mote 
September, in regard to heat, is properly a summer month, its 
mean being higher than that of a Paris July, and little lower than that 
of a Toronto August. In 1881 the mean was 72°.9, with a minimum 
temperature of only 58°. 
