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31st. The rainfall was 1.20 in. below the monthly average. During 
the first three weeks of September the weather was very mild, the 
mean temperature exceeded the average by about 7 degrees ; there 
was, however, considerable variation in the day temperatures ; the 
first eight days were very mild, with S. and S.W. winds ; the 
thermometer reaching SO degrees on the 8th ; on the 10th the wind 
backed to N.E., and the highest temperature was only 59.8; hT.E. 
and E. winds prevailed until the 19th, when it veered to S.E., and 
the thermometer rose to 77.8. The remaining days were much 
colder, with frequent showers of rain, the highest temperature on 
the 24th being only 58.5, and on the 30th 58.0. Very little varia- 
tion was recorded in the night temperatures, which were unusually 
high, exceeding the average by about 5 degrees ; only twice, on the 
27th and 29th, did the thermometer fall below 48 degrees. The 
sky during the days was mostly overcast and cloudy, but the nights 
were generally fine. The barometric pressure averaged high, with 
little variation, until the 21st, but from then until the end of the 
month considerable oscillation was recorded. The only high wind 
during Septemberwas a S.W.gale,from midnight on the 26th to noon 
on the 27th, when the velocity of the wind was 189 miles in the 
twelve hours. The rainfall was 0.17 in. in excess of the average; 
1.83 in. fell between the 19th and 30th. Mr. Glaisher reports that 
only eight times during the last hundred years had so high a mean 
temperature been recorded at Greenwich in September, as this year. 
October was divided into two warm and two cold periods ; from 
the 1st to the 9th the weather was mild and wet, with a mean 
temperature of 54.3, and rainfall of 1.27 in., with S. and S.W. 
winds. From the 10th to the 20th the mean was only 46.6 ; rain 
fell every day, but generally in slight showers ; the winds were 
light and variable, except on the 19th and 20th, when a strong E. 
gale prevailed, with a daily velocity of 350 and 358 miles. The 
thermometer rose to 60 degrees on the 21st, and three warm days 
with S.E. wind, and a mean temperature of 53.1 was recorded. 
The remaining eight days were very overcast and cold, the winds 
chiefly from the E., and the temperature only averaged 44.5; a 
thunderstorm occurred at 10 p.m. on the 22nd. Rain fell on 21 days 
in October, but the showers were mostly small and the total only 
exceeded the average by 0.49 in. Considerable oscillation was 
recorded in the barometer during the month, the most remarkable 
