ANNUAL CLIMATOLOGICAL SUMMARY

PARAMETER

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

YEAR

Average Monthly Temperature (F)

7.3

30.6

22.2

46.3

62.1

62.8

72.9

71.7

63.9

46.4

30.6

31.4

45.7

Average of Daily 1400 Hour Obs (F)

12.1

37.5

27.5

53.9

68.8

69.7

80.7

82.1

73.0

53.0

35.0

34.9

52.3

Average of daily 0700 Hour Obs (F)

0.1

24.5

16.4

41.1

56.6

58.9

68.1

64.1

57.2

40.6

26.7

28.5

40.2

Extreme Monthly Maximum (Observed)

40

58

52

68

82

82

92

89

92

72

54

53

92

Extreme Monthly Minimum (Observed)

-26

8

-6

13

42

40

58

53

41

27

7

12

-26

Total Monthly Precipitation (In)

1.15

0.05

2.60

3.00

14.48

10.70

0.26

2.27

3.00

2.89

0.62

3.20

44.22

Greatest Daily Precipitation (In)

0.45

0.05

0.80

1.60

5.12

4.25

0.20

1.90

1.74

1.39

0.24

1.70

5.12

Monthly Mean Cloudiness

4.1

3.4

5.3

4.6

4.7

5.6

3.6

3.5

4.3

5.1

5.1

6.6

4.7

Total Monthly Snowfall (In)

--

--

--

--

0.0

0.0

0.0

0.0

0.0

0.0

--

--

--

ANNUAL CLIMATOLOGICAL SUMMARY

FT. SNELLING MN

YEAR: 1877

REMARKS ---

Unless otherwise noted, all 1877 data are from fixed time observations taken daily at the Ft. Snelling

post hospital station at 0700, 1400 and 2100 hours local time. So far as can be determined, the station was

not equipped with self-registering maximum-minimum thermometers at any time during 1877.

Foregoing average temperatures include the averages of fixed time observations taken at 0700 and 1400 hours.

Average monthly temperatures were calculated by taking the sum of the 0700 hour and 1400 hour averages

plus twice the sum of the 2100 hour readings and dividing the resulting sum by four.

Extreme maxima and extreme minima are the highest and lowest values OBSERVED at the Ft. Snelling station

during the month involved. Monthly average temperatures have NOT been adjusted to the NWS 2400-2400 hour

observation day. Highest 1877 observed temperatures were recorded at 1400 hours on 7 July and 13 September.

Monthly mean cloudiness values are the averages based on visual sky cover observations taken daily at 0700,

1400 and 2100 hours local time. A cloudiness value of zero (0) indicates a totally clear sky: a value of five indicates

50 percent cloud cover, etc. May-June 1877 precipitation values may include erroneous or even fictitious data.

December 1877 precipitation value is probably a combination of unmelted snowfall and meltwater data.

Greatest daily precipitation recorded on 31 May. Lowest 1877 temperature recorded at 0700 hours on 8 January.

When they appear in the foregoing tables, ITALICS indicate estimated / derived values.