METEOROLOGICAL OBSERVATIONS. 
599 
Summary of Meteorological Observations at Fort Pierre, Missouri River. 
Mean temperatures. 
a 
• 
Date. 
7 a. m. 
2 p. m. 
9 p. in. 
Mean. 
Maxi¬ 
mum. 
Mini¬ 
mum. 
Days rai 
a 
00 
w 
03 
Remarks. 
o 
o 
o 
o 
o 
o 
July, 1854. 
69. 45 
85.26 
76. 06 
76. 92 
97 
63 
7 
0 
Amount of rain considerable. 
August, 1854 .... 
71.93 
91. 16 
81.33 
81.50 
108 
60 
6 
0 
Amount of rain considerable. Thermometer 
above 100° on 6 days, 18th to 23d, and 28th. 
September, 1854. 
62. 33 
79. 80 
69. 66 
71.15 
98 
51 
8 
0 
Amount of rain considerable. Very warm at 
the close of the month. 
October, 1854 ... 
47.22 
72. 35 
60.22 
59. 78 
94 
30 
3 
0 
Amount of rain small. Cold from 13th to 
18th. Warm at 5th, and on 26th to 29th. 
November, 1854.. 
30. 90 
50.10 
40. 66 
40. 50 
78 
10 
0 
2 
Amount of precipitation very small. Coldest 
at I ltli. 
December, 1854.. 
23. 30 
40.71 
32. 90 
32. 00 
61 
— 1 
1 
2 
Amount of precipitation very small. 
January, 1855.... 
13. 80 
24.90 
19.61 
19.17 
50 
—12 
1 
4 
Amount of precipitation considerable. Be¬ 
low zero 3d, 4th, 7th, 13th, and 21st to 
23d. 
February, 1855... 
15. 64 
29. 38 
24.25 
22.51 
57 
—11 
1 
4 
Amount of precipitation small. Below zero 
21st to 27th. 
March, 1855. 
24.61 
46. 06 
30.55 
35. 33 
70 
2 
1 
2 
Amount of precipitation very small. Coldest 
at 19th. 
April, 1855. 
45.23 
69. 36 
57.19 
57. 30 
96 
22 
1 
0 
Amount of precipitation very small. Coldest 
at 10th. Very warm at the close. 
May, 1855. 
55. 74 
75.20 
63. 71 
60. 47 
92 
46 
8 
0 
Amount of precipitation large. Cold at 22d 
to 24th. 
Observations by Fred. Bell man. Latitude given as 44° 23' 23". Altitude, by Nicollet, 1,450 feet. 
Summary of Barometric and Temperature Observations at Columbia Barracks, Oregon, from July 
to December, 1853, and for four months of 1854. 
Temperatures. 
Amount of 
rain. 
Sunrise. 
9 a. m. 
3 p. m. 
9 p. m. 
Mean. 
Maximum. 
Minimum. 
o 
o 
o 
o 
o 
o 
o 
Inches. 
July, 1853. 
61. 33 
71.60 
80. 92 
69. 47 
70. 83 
91 
82 
0. 30 
August, 1853 . 
56. 52 
62. 80 
74. 00 
63. 06 
64.10 
84 
43 
0. 39 
September, 1853. 
50.53 
58. 57 
70. 13 
58. 47 
59. 42 
84 
42 
2. 00 
October, 1853 . 
46. 39 
54. 97 
62. 00 
51.59 
53. 74 
82 
28 
3. 66 
November, 1853. 
42.80 
46.16 
48. 86 
43. 63 
43. 57 
59 
31 
11.57 
Note. —The temperature observations at Columbia Barracks (Fort Vancouver) are from the record kept at the military 
post. For use of the survey, they were copied to the close of November, 1853. 
