X. 
CLIMATOLOGICAL OBSERVATIONS TAKEN IN HERTFORDSHIRE 
IN 1889. 
By John Hopkinson, F.L.S., F.G.S., F.B.Met.Soc. 
Head at Watford , 18 th November , 1890. 
Observations have been made in 1889 at the five stations from 
which the reports for the two previous years were drawn up. In 
the first of these reports I gave, for comparison, a table showing 
the mean results of observations at three stations in Hertfordshire 
for the five years 1882-86 ; to the present report I add one showing 
the same at our five stations for the two years 1887 and 1888. 
The mean temperature of Hertfordshire in 1889, as deduced 
from observations at these five stations, was 0 o, 8 above that of the 
two previous years, and therefore l o, 0 below the mean of 1882-86. 
The mean daily range was 0 o- 5 less than that of 1887-88, and 1 0, 3 
less than that of 1882-86. The extremes of temperature were 
about the same as in 1888, and therefore again much less than in 
1887. The relative humidity, amount of cloud, rainfall, and number 
of days of rain were rather greater than the mean, both of the two 
previous years and of the five years 1882-86, and consequently of 
the seven years 1882-88. 
In 1889, therefore, the air was rather cold and humid, the sky 
rather cloudy, and the rainfall rather heavy and frequent. 
EOYSTON. 
(London Hoad.) 
Latitude : 52° 2' 34" N. Longitude : 0° 1' 8" W. Altitude : 
301 feet. 
Observer: Hale Wortham, F.R.Met.Soc. 
Months 
Temperature of the Air 
Humidity 
Cloud, 0-10 
Rain 
Means 
Extremes 
Am’nt 
Days 
Mean 
Min. 
Max. 
Range 
Min. 
Max. 
O 
O 
O 
O 
O 
O 
% 
ins. 
Jan. 
33*9 
30-5 
37 '2 
67 
17-2 
50 - 4 
90 
7-0 
*95 
13 
Feb. 
365 
3°’4 
427 
12*3 
18-1 
56-1 
86 
7‘3 
i* 8 o 
15 
March . 
40-1 
32*4 
47 '8 
I5-4 
i 8*8 
62*4 
83 
70 
1-23 
13 
April.. 
45 ‘8 
37’2 
54‘3 
iyi 
3i-8 
64-1 
86 
7'5 
2 '44 
17 
May. 
57'o 
477 
66-3 
18-6 
37*i 
84-0 
89 
6-8 
3-46 
18 
June. 
6 ro 
50-5 
7i‘5 
21*0 
44'9 
84*3 
83 
5*8 
2-47 
5 
July. 
61 - 9 
5i-9 
71-9 
20'0 
43 '6 
82*0 
82 
67 
2-88 
12 
August. 
59-i 
48-9 
69-3 
20’4 
43 ‘2 
85*0 
83 
6-4 
1 '54 
15 
Sept. 
56*6 
47-8 
65-5 
17-8 
36-3 
79 6 
81 
6-3 
2*06 
11 
Oct. 
48-2 
41-4 
54'9 
13*2 
34 9 
59*o 
94 
57 
3 '80 
23 
Nov. 
44*0 
38'9 
49'2 
10-3 
25*9 
57‘o 
92 
6'6 
79 
9 
Dec.. 
37-0 
3i'9 
42-0 
IO’I 
199 
53 - i 
9i 
6-8 
'99 
15 
Year . 
48-4 
40-8 
56-0 
15-2 
17-2 
85 -o 
87 
67 
24*41 
166 
