January
February

March

April

May

June.

NUMBER OF DAYS WITH ONE HOUR OR MORE OF Fog, and Number OF THUNDERSTORMS IN ELEVEN YEARS.

[Record began January 1, 1890.]

January

February.

March

April

May

June

July

August

September..

October

November..
December

Year.

"anuary February

March

April

May

June

July

August.
September..
October
November..
December

Month.

1900.

1900.

Number.

Foggy days.

1h a. m.

2h

22
17

10

16

3

6

Aver-
age.

2h

3h

AVERAGE PRESSURE, IN INCHES AND THOUSANDTHS, FOR EACH HOUR OF SEVENTY-FIFTH MERIDIAN TIME. [Correction applied to reduce to standard gravity, -0.03. λ=32° 43′ N.; p=117° 10′ W.; local time 2h 49m slow. H=87 ft.]

4h

0

0

0

0

0

0

5h

29.981 0.981 0.974 0.971 0.971 0.970 0.964 0.963 0.967 0.976 0.991 0.005
29.918 0.920 0.917 0.913 0.910 0.907 0.903 0.905 0.914 0.921 0.930 0.937
29.862 0.861 0.859 0.857 0.850 0.843 0.840 0.842 0.849 0.856 0.868 0.875
29.881 0.881 0.879 0.874 0.865 0.861 0.859 0.861 0.871 0.882 0.892 0.897
29.885 0.885 0.882 0.876 0.869 0.864 0.865 0.865 0.874 0.884 0.888 0.891
29.817 0.816 0.807 0.799 0.792 0.790 0.788 0.797 0.804 0.813 0.821 0.823
29.762 0.763 0.761 0.758 0.752 0.751 0.753 0.759 0.771 0.780 0.785 0.782
29.832 0.832 0.830 0.827 0.819 0.815 0.816 0.823 0.834 0.844 0.853 0.861
0.812 0.813 0.811 0.808 0.807 0.805 0.812 0.819 0.827 0.833 0.836
0.846 0.844 0.844 0.843 0.839 0.839 0.843 0.849 0.858 0.869 0.875
29.890 0.891 0.889 0.887 0.884 0.881 0.876 0.879 0.885 0.895 0.905 0.915
29.971 0.972 0.971 0.966 0.965 0.961 0.953 0.952 0.958 0.968 0.976 0.991
29.872 0.872 0.869 0.865 0.861 0.857 0.855 0.858 0.866 0.875 0.884 0.891

29.813

29.847

6

6

24

26

22

11

11h

11h

0

3

3

2

1

Mid. Mean.

Thunderstorms.

23

2

0

6

1

Noon. 1 p. m.

0

0

0

1

0

0

|

0.002 0.975 0.951 0.942 0.942
0.937 0.918 0.900 0.884 0.876
0.872 0.857 0.845 0.832 0.824
0.895 0.889 0.881 0.872 0.864

ļ

0.943 0.944 0.955 0.962 0.969 0.978 0.970 0.025 0.926
0.875 0.878 0.888 0.897 0.903 0.910 0.908 0.972 0.849
0.820 0.823 0.830 0.837 0.849 0.863 0.850 0.891 0.812
0.856 0.859

0.860 0.867 0.876 0.885 0.875 0.927 0.823
Į
0.868 0.876 0.874 0.910 0.838

0.890 0.889 0.882 0.872 0.864 0.858 0.854 0.854 0.860
0.825 0.821 0.814 0.809 0.803 0.796 0.793 0.793 0.798 0.803 0.812 0.807 0.843 0.777
0.781 0.775 0.768 0.759. 0.750 0.743 0.738 0.738 0.741 0.749 0.761 0.761 0.793 0.730
0.857 0.853 0.845 0.836 0.826, 0.819 0.813 0.814 0.816 0.821 0.827 0.832 0.867 0.800
0.832 0.822 0.815 0.804 0.793 0.787 0.787 0.788 0.793 0.805 0.813 0.811 0.848 0.774
0.867 0.851 0.839 0.828 0.824 0.821 0.822 0.827 0.836 0.845 0.852 0.845 0.885 0.809
0.910 0.885 0.870 0.859 0.854 0.853 0.856 0.865 0.873 0.879 0.886 0.883 0.928 0.841
0.982 1 0.954 0.941 0.933 0.925 0.925 0.929 0.939 0.950 0.957 0.963 0.958 0.009 0.913
0.841 0.841 0.846 0.852 0.860 0.869 0.861 0.908 0.824

0.013 0.940

0.878 0.900 0.891

0.825 0.783 0.859 0.839 0.874

0.918 0.993 0.893

Mean Mean max. min.

January
February

March

April

May

June..

July

August

September....

October....

November

December

Year...

January

February

March.

April

May

June........

July

August

September..

October...

November
December

Year..

1898.

January

February.

March..

April

May

June..

July

August

September...

October.....

November.

December

AVERAGE TEMPERATURE (DEGREES FAHRENHEIT) EACH HOUR, SEVENTY-FIFTH MERIDIAN TIME.

[h=94 ft.; local time, 2h 49m slow.]

1900.

1900.

Sum Percentage of possible.

5h

a. m.

47

21

29

1h a. m.

6h

89

35 32

20

17

31

54

67

2h

3h

97 345 571

48

8h

SUNSHINE FOR THE YEARS 1898, 1899, AND 1900.
[N. lat. 32° 43'.]

Percentage of sunshine recorded during hours ending (local time)—

61.5

60.3

62.4

60.6 62.3 62.4 62.5 62.3
59.4
58.5 57.3 56.5 57.1 63.7 51.8
62.1 63.4 63.3 63.6 63.2
61.3 59.8 58.6 57.0 55.9 57.2 64.6 50.7
62.4 63.6
63.4 63.3 63.2 62.7 62.0 60.9 60.0 59.5 58.8 59.1 64.5 54.0
!
60.2 60.9 60.9 60.5 60.8 60.1 59.3 58.6 57.8 57.3
56.8 57.1 61.7 52.0
62.6 63.7 64.3 64.5 64.4 63.8 63.8 62.8 61.6 60.7 60.2
60.6 65.5 56.3
66.4. 67.3 67.2 67.1 66.9 66.6 65.8 65.4 64.6 63.8 63.3 63.9 68.8 60.1
69.9 70.7 70.9 70.6 70.3 69.7 69.0 68.3 67.1 66.4 66.2 67.1 71.7 63.5
68.4 68.6 68.7 68.8 68.6 68.0 67.5 66.4 65.4 64.9 64.6 65.7 70.0 62.5
69.3 69.9
70.1
69.7 69.0 68.3
66.9 65.9 65.0 64.3 65.3 71.1 60.1
67.1 67.2 67.2 66.9 66.2 65.0 64.2 63.5 62.9 62.1 62.8 68.3 57.9
70.0 69.6 69.9 69.5 68.7 66.7 64.9 63.7 62.8 61.9 63.7 72.1 57.2
67.0 67.2 66.6 66.8 65.7 63.7
61.9 60.3 59.0 58.1 59.7 68.5 52.3
66.2 66.3 66.2 66.0 65.4 64.4 63.3 62.2 61.4 60.7 61.6 67.5 56.5

70.1

66.5

69.5

65.5

65.3

3h

4h

49

26 31

73

68

71

56 64 71

9h 10h 11h Noon. 1h

67 84

44 56 66

593 727

4h

བྲཱབྲཱ¢་ལྕ་བྲཧྨ

61

5h

51

66

71

93

76

851

75

78

78 86

5h

6h

89

96

8h

7h

2h

70

73

72

86 87

85

85

84 85

76

76

73 77

87 87

3h

93

98

97

96

95

96

96

97

92

93

82

80 84

961 1,027 1,039 1,053 1,038 1,005

86 83

83 82

84 86

93

96

Sh

9h

53.1
52.6 53.2 55.8
52.2 52.3 54.0 57.6
54.5 54.9 56.7 59.5

52.8 54.1 56.5 58.1

60.7

59.1
62.6

64.0

53.1
52.1
54.7
52.7
56.9 56.7 57.9
60.6 60.7
61.5
64.1 64.4 65.3
63.2 63.1 63.9
60.8
62.1 64.7 66.6
58.8 61.3 63.3
59.0 61.4 64,1
53.9 55.0 58.7
58.0 59.7 61.9

66.5

69.0

65.3

66.5

60.9

58.9

58.6
58.8

59.9

54.4

54.4

57.6

57.5

4h

71

82

75

80

76

80

90

10h

98

94

89

94

76

71 80 86 87 88 86 84 78

10h

11h Mid. Mean.

11h

1124

7h

75

60

70

71 85

62 52

63 57 80

59 40

80

71

83

41

88 93

8h

Noon. 1 p. m.

8888

33

68

Mean Mean max. min.

81

88

100

905 439 181 3,913.1

58.8 60.0

61.4

59.5

62.1

65.7

69.5

68.0

68.7

65.5

67.4

63.2

64.2

PerTotal centage (hours). of possible.

921.5 229,6

276.4

255.2

260.4

248.4

299.6

317.9

306.5

268.7

287.2

241.7

326.1

83 83

60 100

88 79 66 64

80 73 53

90 100

912

Accumulated depths of precipitation (in inches) during

periods of time indicated.

1878 1879

1880

1881

1882

1883

1884

1885

1886

1887

1888

1889

1890

1891

1892

1893

Data by Mr. MAURICE CONNELL, Observer, Weather Bureau.

Red Bluff is the county seat of Tehama County, at the northern end of the Sacramento Valley. The city is situated on the western bank of the Sacramento River, the average elevation above sea level being 309 feet, and is in latitude 40 10' north, longitude 122 14' west. The land slopes gently to the river, and within a radius of 5 miles the country is comparatively flat. The general movement of the air is from the north and northeast into the valley from the mountains on the north and east. During the summer months, however, there is a wellmarked southerly movement of the air, which is in part due to the strong westerly indraft through the Golden Gate and its subsequent deflection northward through the valley. The highest temperature recorded is 114 and the lowest 18. The average annual precipitation is 25.56 inches.

1891

1895

1896

1897

1898

1899

1900

CLIMATOLOGY OF THE GREAT VALLEY.

Year.

Means (23 years)

RED BLUFF.

MONTHLY AND ANNUAL MEAN TEMPERATURE (DEGREES F.).

Jan. Feb. Mar.

Apr. May. June. July. Aug. Sept. Oct.

1

73.9 83.4. 77.4 71.7 65.3 50.0

44. 1

41.2

46.2

47.5 53.5 61.0

46.2

48.7

40.9

15.8

47.3 50.2 55.5 60.4 67.4 81.0 81.6 83.2 72.9 65.4 55.6 47.4
44.6 53.6 57.0
61.3
62.5 78.7 81.6 83.4 77.2 64.0 51.0 44.6
44.5 46.5 49.7 55.8
64. 1
49.4
50.0 53.0 55.6 63.6 69.3 72.8
78.7 76.4 71.5 57.5 51.0 45.9
44.4 52.5 56.6 67.4 75.6 84.3 81.2 60.3 58.3 51.3 47.5
45.1 58.3 56.3 64.3 80.3 84.9 79.9 75.4 57.7 50.6 44.4
45.9 51.6 56.8 68.0 69.6 78. 1
81.5 67.3 62.1 54.7 47.5
62.1 70.4 71.6 80.7
83.8 74.8 65.6 52.7 49.3
545 52.8 57.7 66.9 79.1 82.6 81.5 75.6 60.7 51.3 50.0
43.4 58.9 60.2 68.8 77.1 85.9 81.3 76.4 71.1 55.2 48.2
53.9 54.5 67.0 68.1 70.7 80.9 83.7 81.2 68.2 54.8 48.3
51.6 56.8 61.0 66.8 80.0 81.3 80.0 76.0 61.4 54.4 41.8
45.2 50.8 60.3 67.6 72.6 80.4 79.5 71.4
65.0
57.9 15.0
41.4 55.0 57.8 66.3 72.2 82.6 83.1 72.9 66.0 56.8 42.5 i
53.0 56.0 54.1
65.6 71.8 78.7 80.4 72.0 63.5 56.1
47.6
46.8 49.8 54.6 65.8 73.4 80.4 81.0 67.5 61.4
53.5 50.2
I
45.3 51.5 61. 1 66.8 69.1 83.0 82. () 71.8
€3.9 59.0 45.0
3.8 52.8 52.8 59.1 66.2 78.2 80.0
81.2 68.5 67.0 53.6
43.1
48.8 53.2 53.8
52.2 61.0 77.4 85.3 78.8
72.8
67.2 50.8 49.0
45.8 17.0 54.4 63.2 72.6
74.0 82.1 80.2 72.6 62.9 49.7 46.0
42.4 51.0 59.2 64.4 63.6
75.4 83.1
81.3
72.6 64.3 53.6
45.7
48.8
51.6 52.2 60.8 63.2 77.9 82.0 73.8 78.0 61.0 54.4 45.5
51.1
57.6 67.0
82.6 I 77.0 69.9 60.0 54.8* 45.4
49.4 54.8 59.2 66.6
81.9. 80.9
1

39.2

48.5

17.1

B.2

42.1

62.5

62.0 62.5

62.4 62.5

48.8

58.6

76.8

45.3

72.8 63.5 53.6 46.61 62.4

75.1

Nov. Dec. Annual.

93

64.0

63.3

61.2

62.1 60.2

61.5 60.8 64.4 63.2 64.4 64.5 63.3

61.5 62.4

62.2

60.6 62.0

62.2