XXI 
YORK (MUSEUM) 1917. 
BRIGHT 
SUNSHINE 
Barometer at Mean Sea Level 
Year. 
Daily* 
Absolute. 
Mean. Percentage. 
1917. 1917. 1916. 
Highest. Date. 
hottest. Date. 
Hours. % % 
Millibars. 
Millibars. 
J anuary 
0-55 7 17 
1033‘2 22nd, 9 p.m. 
976-6 8th, 9 a.m. 
February 
1-43 1.5 20 
1034’5 8th, 9 p.m. 
9rjh, 9 a.m. 
1009-1 20th, 9 p.m. 
March 
2-94 25 18 
1037’6 15th, 9 p.m. 
987-8 29th, 9 p.m. 
30th, 9 a.m. 
April 
3-33 24 39 
1037'6 25th, 9 p.m. 
989-8 14th, 9 a.m. 
May 
5-84 37 27 
1029‘4 3rd, 9 a.m. 
6th, 9 a.m. 
1006-8 18th, 9 p.m. 
19tli, 9 a.m. 
June 
6-73 40 25 
1029-4 30th, 9 p.m. 
1000-3 20th, 9 p.m. 
! July 
6-23 38 32 
1028-4 5th, 9 p.m. 
999-6 18th, 9 p.m. 
' August 
4-29 29 32 
1017-3 5th, 9 a.m. 
967 8 28ih. 9 a.m. 
September 
1 
4-13 33 32 
1029 1 29th, 9 a.m. 
1001-7 1st, 9 a.m. 
1st, 9 p.m. 
October 
3-42 33 22 
1021 0 20th, 9 a.m. 
20th, 9 p.m. 
977-6 12th, 9 p.m. 
November 
1-60 19 15 
1033-8 18th, 9 a.m. 
984-4 9th, 9 p.m. 
December 
TOO 14 9 
1032-2 4th, 9 a.m. 
1002 0 1st, 9 a.m. 
1 Year 
3-47 29 26 
1037-6 Mar. 15, 9 p.m. 
Apr. 25, 9 p.m. 
967-8 Aug. 28, 9 a.m. 
( 
The Barometer readings are expressed in millibars (1000 millibars = 29‘SSI mercury inches). 
*For Monthly Totals see Form 3211. 
