Attach 5 Climate Data.pdf

FA4497-12-R-0002

Attachment 5

DATA SOURCE Authoritative climate summary - data quality and quantity sufficient to produce accurate climatological values

STATION NUMBER

STATION NAME

EXTREME PERIOD OF RECORD

MEAN PERIOD OF RECORD

UTC TO LST

Temperature () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Temperature Extreme Maximum (°F) 73 75 87 91 97 100 103 100 97 91 83 77 103 Temperature Mean Maximum (°F) 43 45 54 64 72 81 85 84 77 67 57 47 65 Temperature Mean (°F) 36 36 44 53 62 72 76 75 69 58 49 40 56 Temperature Mean Minimum (°F) 28 29 36 45 54 64 69 68 61 50 41 32 48 Temperature Extreme Minimum (°F) -5 0 9 22 34 43 53 48 39 24 14 -2 -5 Temperature Maximum Range (°F) 43 41 43 40 40 34 36 32 36 38 34 36 43 Days With Temperature >= 90°F 0 0 0 0 1 5 9 7 1 0 0 0 22 Days With Temperature <= 32°F 22 21 13 2 0 0 0 0 0 0 6 19 83 Days With Temperature <= 0°F 0 0 0 0 0 0 0 0 0 0 0 0 0

Precipitation () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Precipitation Period Maximum (In) 8.2 7.5 9 7.3 8.1 15.3 12.6 16.6 9.9 10.8 8.6 8.2 72.8 Precipitation Period Mean (In) 3.1 2.9 3.9 3.4 3.6 3.5 4.1 4.4 3.7 3.2 3.5 3.5 43 Precipitation Period Minimum (In) 0 0 0 0 0 0.7 0.8 0 0.2 0 0.3 0 22.6 Precipitation Period Daily Maximum (In) 2.7 2.7 3.7 3.5 3.3 3.7 5.4 9 6.9 4.1 5.7 2.8 9 Snowfall Period Maximum (In) 27 43 20.2 2.2 0 0 0 0 0 0 9 22.9 58.3 Snowfall Period Mean (In) 5.1 6.2 2 0.2 0 0 0 0 0 0 0.5 2.3 16.2 Snowfall Period Daily Maximum (In) 14 18.5 8.2 2.2 0 0 0 0 0 0 9 17.4 18.5 Days with liquid >= Trace 4 4 3 5 4 4 3 3 2 2 3 3 41 Days with liquid >= 0.01" 10 9 10 11 10 11 10 9 8 9 9 10 116 Days with liquid >= 0.5" 2 2 2 2 1 3 3 2 3 3 3 2 29 Days with snow >= Trace 4 4 3 1 0 0 0 0 0 # 1 3 16 Days with snow >= 0.05" 3 3 1 # 0 0 0 0 0 0 # 1 9 Days with snow >= 1.5" 1 1 0 # 0 0 0 0 0 0 # 0 3

Moisture () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Relative Humidity Mean Maximum (%) 86.4 86.3 85 89.6 92.1 93.9 93.5 93.9 95.2 92.8 89.1 87.3 90.4 Relative Humidity Mean Minimum (%) 48.5 44.7 42.7 46.4 49.2 51.7 50.7 53 54.8 52.9 51.4 50.9 49.8 Vapor Pressure Mean (In Hg) 0.17 0.16 0.21 0.3 0.42 0.6 0.68 0.68 0.58 0.4 0.29 0.2 0.39 Dew Point Temperature Mean (°F) 27 27 33 44 53 63 67 67 62 51 42 32 47 Dew Point Temperature Extreme Maximum (°F) 68 67 66 74 84 84 84 85 82 79 73 69 85 Dew Point Temperature Extreme Minimum (°F) -27 -21 -8 -1 18 31 35 34 28 12 -7 -23 -27

Wind () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Prevailing Wind Direction W W NW W W SW SW SW S W W W W Wind Speed Mean for Prevailing Wind Direction (kts) 9.7 9.9 11.8 10.3 8.5 8.2 8 7.4 6.6 9.3 8.9 9.9 9.1 Wind Speed Mean for All Wind Directions (kts) 9.5 9.3 10.1 9.3 7.8 7.6 6.8 6.8 7.4 7.6 8.2 8.7 8.4 Wind Speed Maximum (kts) 46.8 36.9 40 35 37.9 42 33 35.9 42.9 40.6 35 35.9 46.8 Gust Speed Maximum (kts) 55 59.8 61 49 74 57.9 62 48 59.1 43.9 49 57.9 74

Pressure () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Pressure Altitude Extreme Maximum (ft) 1076.1 1151.6 1420.6 981 695.5 462.6 524.9 616.8 876 731.6 948.2 836.6 1420.6

Weather Occurrence () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Fog Days Mean 14 13 13 16 16 19 19 20 18 17 15 13 195 Thunderstorm Days Mean # # 1 4 4 8 8 6 2 1 0 # 36 Precipitation Days Mean * * * * * * * * * * * * * Rain Days Mean 10 9 12 16 14 14 12 13 10 10 11 11 145 Freezing Rain Days Mean 2 1 # 0 0 0 0 0 0 0 0 1 3

Cloud Cover () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann Cloud Cover Mean (x/8) 5 5 5 5 5 5 5 5 5 4 5 5 5

% Frequency of Wind > 25 kts () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann

17-19 LST 3.7 5.6 5.7 3.8 1.9 1.6 1 1.2 2.3 1.7 4.6 4.5 3.1

20-22 LST 4.5 8.1 6.2 3.2 1 0.8 0.4 0.3 2.5 1.9 4.1 4.5 3.1

23-01 LST 3.4 6.4 7 3.1 0.6 0.2 0.1 0 1.4 2.7 4.1 5.1 2.8

02-04 LST 4.4 7.1 7.3 3.4 0.8 0.1 0.2 0.1 1.8 0.6 2.8 8.4 2.9

05-07 LST 6.3 6.9 7 4.4 1.8 0.5 0.3 0.1 2.9 1.8 3.3 6.4 3.4

08-10 LST 9.1 13.5 11.8 8.4 2.4 0.8 0.3 0.8 2.6 5.7 5.3 12.5 6.1

11-13 LST 11.9 17.2 16 10.3 3.7 1.6 1 0.4 4.4 4.8 7.6 13.7 7.7

14-16 LST 8.4 13.9 13.5 8.3 4.3 2.3 2.9 1.1 3.7 3.5 6.3 8.5 6.4

All Hours 6.5 9.9 9.3 5.5 2.1 1 0.8 0.5 2.7 2.8 4.7 7.9 4.4

% Frequency of Fog () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann

17-19 LST 21.9 18.1 14.6 17 17.4 16.6 14.7 17.1 17.1 19.3 23.6 20.2 18.2

20-22 LST 19.9 18.3 19.9 19.7 21.2 24.4 25.4 26.3 28 24.3 24.8 17.7 22.5

23-01 LST 22.8 20.1 20.9 24.9 26.9 32.2 39.9 33.8 29.5 33.7 26.8 19.8 27.7

02-04 LST 22.2 26 24.5 28.1 35.9 47 49.4 47.1 40 41 31.5 21.1 34.8

05-07 LST 25.8 29.7 28.1 35.4 36 42.1 41.4 46.5 44 44 35.5 25.3 36.2

08-10 LST 25.2 25.5 17.3 23.8 18.1 19.9 14.7 14.8 19.5 22.5 30.7 20.3 21.1

11-13 LST 19.5 18.3 14.5 17.1 14.1 13.4 8.9 8.3 10.8 12.5 20.8 16.6 14.6

14-16 LST 21 19 16.1 16.4 12.4 11.3 10.7 9.4 10.7 12.5 18.5 17.3 14.7

All Hours 22.3 21.9 19.6 23 23 26.2 26.3 25.7 25.4 26.7 26.7 19.8 23.9

% Frequency of Thunderstorm () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann

17-19 LST 0 0.4 0.8 3.3 3.1 9 6.6 5.3 1.1 1.3 0 0 2.6

20-22 LST 0.1 0 1.2 2.7 2.7 6.3 5.4 3.6 1 2.2 0 0 2.1

23-01 LST 0 0 0.1 1.5 1.2 2 2.9 2.7 2.2 1.1 0.2 0.3 1.2

02-04 LST 0.6 0 0.3 0.7 0.8 0.8 3 2 0.6 0.8 0.3 0 0.8

05-07 LST 0 0.1 0 1.4 1.4 0.3 0.7 1.2 0 0 0 0.5 0.5

08-10 LST 0.2 0.4 0.4 0.8 0.5 0.4 1.8 1.3 0.7 0 0.5 0.3 0.6

11-13 LST 0.6 0.2 0.3 1.2 1.7 1.3 5.1 3.1 1.2 0 0.2 0 1.2

14-16 LST 0.3 0.1 0.4 1.2 3.6 6.8 8 4.7 1.1 0.3 0.2 0 2.2

All Hours 0.2 0.2 0.4 1.6 1.9 3.4 4.1 3 1 0.7 0.2 0.1 1.4

-5

14 WS

724088 ICAO

LOCATION (DEGREES)

ELEVATION (FEET)

PREPARED BY

KDOV

39.117-75.467

DOVER AFB, DE

1942/12/01 - 2011/07/31 1999/01/01 - 2008/12/31

% Frequency of Rain () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann

17-19 LST 11.8 11.3 13.7 17.8 14.8 16.8 12.8 13.7 12.8 15.2 13.3 15.9 14.2

20-22 LST 12.1 8.1 17.5 15.1 11.5 17.3 13.3 10.5 18.8 16.2 13 11.6 13.8

23-01 LST 9.6 9.8 16.3 17.8 11.4 14.1 11.1 8.1 13.4 13.8 12.5 15.3 12.8

02-04 LST 9.6 8.6 18.3 20.1 14.3 13.7 11.1 7.3 11 12.6 12.9 12.3 12.7

05-07 LST 12.1 8.4 14.1 19.6 13.3 11.9 8.7 7 10.9 13.5 10.8 15 12.2

08-10 LST 12.6 11.8 11.6 16.3 10.2 12.4 8.4 7.4 10.8 15.6 14 11.7 12

11-13 LST 13.7 9.9 14.1 15.8 13.8 11.4 8.6 11.4 13.6 14.9 14.9 13.1 13

14-16 LST 11.6 13.7 15.9 17.8 14.8 14.2 15.2 11.5 14.1 15.5 12.4 15.9 14.4

All Hours 11.7 10.2 15.2 17.6 13 14 11.1 9.6 13.2 14.6 13 13.9 13.1

% Frequency of Snow or Ice Pellet () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann

17-19 LST 7 5.2 1.2 0 0 0 0 0 0 0 0.9 2.1 1.4

20-22 LST 6.1 4.4 1.5 0.2 0 0 0 0 0 0 0.3 2.9 1.3

23-01 LST 7.1 5.6 1 0 0 0 0 0 0 0 0.1 2.3 1.3

02-04 LST 5.6 5.7 1.3 1.1 0 0 0 0 0 0 0 3.2 1.3

05-07 LST 4.6 7.7 2.9 2 0 0 0 0 0 0 0 2 1.5

08-10 LST 5.9 7 3.6 0.3 0 0 0 0 0 0 0.5 1.4 1.5

11-13 LST 7.4 7.4 2.9 0 0 0 0 0 0 0 0 3 1.7

14-16 LST 6 5.5 2.6 0 0 0 0 0 0 0 0.5 1.4 1.3

All Hours 6.2 6.1 2.1 0.5 0 0 0 0 0 0 0.3 2.3 1.4

% Frequency of Ceiling & Visibility < 100.00 FT / 0.25 MI () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann

17-19 LST 1.4 0 0.2 0.2 0.1 0.1 0 0 0 0.7 0.8 0.9 0.4

20-22 LST 1 1 0.2 0.4 0.9 0.2 0 0 0 0.6 1 0.7 0.5

23-01 LST 1.6 1.5 0.1 0.6 0.9 0 0.4 0 0.3 1 2 0.2 0.7

02-04 LST 1.5 1.6 0.1 1 1.3 0.2 0.8 0.1 0.9 1.5 2.8 0.8 1

05-07 LST 1.5 1.4 0.4 0.3 1.1 0.2 0.9 0.1 0.8 1.2 3.6 0.9 1

08-10 LST 1.1 0.6 0 0 0.2 0 0.2 0 0 0.2 1 0.1 0.3

11-13 LST 0.2 0.4 0 0.1 0 0 0.1 0 0 0 0.6 0 0.1

14-16 LST 0.2 0.1 0.3 0 0 0.1 0 0 0 0 0.7 0.3 0.1

All Hours 1.1 0.8 0.2 0.3 0.6 0.1 0.3 0 0.2 0.6 1.6 0.5 0.5

% Frequency of Ceiling & Visibility < 200.00 FT / 0.50 MI () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann

17-19 LST 1.5 0.6 0.7 0.3 0.1 0.1 0 0 0 0.7 1 1.6 0.6

20-22 LST 1.3 1.8 0.9 0.6 1.2 0.5 0 0 0 1.1 1.6 0.8 0.8

23-01 LST 2.5 1.9 0.5 0.9 1.7 0.3 0.9 0 1 1.9 4.3 0.7 1.4

02-04 LST 2.9 2 0.2 1.9 2.5 0.9 1.9 0.4 1.8 2.6 4.7 1.7 2

05-07 LST 2.5 2.3 0.8 1.7 2.3 0.7 1.6 0.8 1.5 2.7 5.3 2.3 2

08-10 LST 2.4 1.2 1 0 0.2 0 0.4 0 0.1 0.2 2.3 1 0.7

11-13 LST 1.1 1 0.5 0.2 0 0.1 0.2 0 0 0 0.7 0.4 0.4

14-16 LST 1.1 0.7 0.7 0 0 0.1 0 0 0 0 0.7 0.8 0.3

All Hours 1.9 1.4 0.7 0.7 1 0.3 0.6 0.1 0.5 1.1 2.6 1.2 1

% Frequency of Ceiling & Visibility < 300.00 FT / 1.00 MI () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann

17-19 LST 3.6 3.4 1.9 1.8 1.1 0.5 0.4 0.3 0.1 1.5 2.4 2.5 1.6

20-22 LST 2.4 4.8 1.8 2.7 1.6 1.1 0.2 0 0.1 2.3 4.8 3.5 2.1

23-01 LST 4.7 4.6 2.2 3.3 3.5 1.6 1.4 0.5 2.6 2.8 6.3 4.6 3.2

02-04 LST 6 5 2 4.4 5.8 2.1 3.8 2 4.3 5.2 7.5 4 4.3

05-07 LST 6.4 5 2.7 6 4.3 1.7 2.9 2.3 4.4 5.9 8.5 4.7 4.6

08-10 LST 6.1 3.7 2.7 2.8 1.4 0.2 0.8 0.1 0.2 2 5.1 3.5 2.4

11-13 LST 3.7 2.9 1.6 1 0.3 0.2 0.3 0.2 0.5 0.4 1.8 2.4 1.3

14-16 LST 4 3.3 1.7 1.3 0.5 0.2 0.1 0 0 0.3 1.8 2.4 1.3

All Hours 4.6 4.1 2.1 2.9 2.3 0.9 1.2 0.7 1.5 2.5 4.8 3.4 2.6

% Frequency of Ceiling & Visibility < 500.00 FT / 1.50 MI () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann

17-19 LST 7.3 6.3 3 3 2.3 2.2 0.9 0.9 1.2 3.1 4.9 5.5 3.4

20-22 LST 5.5 7 3.8 4.5 3.1 2.6 0.8 0.7 1.8 3.6 6.4 6.6 3.8

23-01 LST 7.5 6.9 4.8 6.7 4.7 3.2 2.9 1.4 4.5 5.9 8 7.4 5.3

02-04 LST 8.4 7.3 5 7.5 8.7 5.7 6 3.6 7 8.3 10.4 7.7 7.1

05-07 LST 10.2 6.7 5.6 9 8.2 5.1 5.4 5.5 7.1 9 11.4 8.1 7.6

08-10 LST 9.3 6.8 4 5.6 3.9 2.2 1.3 1 0.7 4.5 7.7 6.8 4.5

11-13 LST 7 5 3.6 2.2 2.4 2.2 0.4 0.4 0.8 1.6 4.4 6.4 3

14-16 LST 7.3 5.4 2.5 2.9 1.8 1.8 0.9 0.3 0.6 1.8 4.3 3.9 2.8

All Hours 7.8 6.4 4 5.2 4.4 3.1 2.3 1.7 3 4.7 7.2 6.5 4.7

% Frequency of Ceiling & Visibility < 800.00 FT / 2.00 MI () Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann

17-19 LST 9.8 8.4 4.2 5.4 5.5 4.1 2 1.6 3.5 5.2 7.6 7.7 5.4

20-22 LST 8.3 8.8 5.3 8 5.9 5.9 2.2 2.4 5.1 5.7 8 8.9 6.2

23-01 LST 9.5 8.3 6.9 9.8 8.3 7.3 5.7 3.6 6.6 9.1 10.8 9.5 7.9

02-04 LST 10.6 9.7 8.5 12.2 13.1 11.4 10.8 8.1 10.4 12.4 12 9.5 10.7

05-07 LST 12.4 9.4 8.9 14.5 12 10.9 10.1 11.1 12.4 14.4 13.5 10.5 11.7

08-10 LST 11.7 10.3 6.4 10.1 6.2 5.7 3.4 3.9 3.4 9.5 11 8.7 7.5

11-13 LST 9.4 6.8 6.2 6.1 5.3 3.7 1.3 2 2.5 4.4 7 7.7 5.2

14-16 LST 9.1 8.5 4.7 6.3 3.9 3.6 1.4 0.8 2.3 4.1 5.6 5.7 4.7

All Hours 10.1 8.8 6.4 9 7.5 6.6 4.6 4.2 5.8 8.1 9.4 8.5 7.4

% Frequency of Ceiling & Visibility < 1000.00 FT / 2.00 MI Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann

17-19 LST 10.8 9.3 5.2 6.6 6.4 4.7 2.1 2.3 4.5 7 8.1 8.3 6.2

20-22 LST 9.4 9.2 6.2 9.4 6.7 7.3 2.6 3.6 6.8 8.5 8.4 9.7 7.3

23-01 LST 10.4 8.9 8.3 11.4 10.1 8.4 6.6 4.6 7.8 11.1 11.8 10.6 9.2

02-04 LST 11.6 10.3 9.8 14.6 14.2 12.9 11.7 9.4 11.2 13.7 13.7 10.5 12

05-07 LST 12.9 10.3 9.8 16.9 14.6 12.4 11.3 11.4 14.6 15.8 14.9 11.1 13

08-10 LST 12.4 11 8.4 11.2 7.5 6.9 4.2 5 4.4 11.5 11.7 9.7 8.6

11-13 LST 10.2 8.3 7.2 8 6.6 4.7 2.1 2.4 3.3 5.8 7.9 8.8 6.3

14-16 LST 10.1 9.4 5.5 6.8 5.1 3.8 1.9 1.2 3.5 5.6 6.5 6.4 5.5

All Hours 11 9.6 7.5 10.6 8.9 7.6 5.3 5 7 9.9 10.4 9.4 8.5

% Frequency of Ceiling & Visibility < 1500.00 FT / 3.00 MI Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann

17-19 LST 13.2 11.7 8.9 10.4 10 8.5 5.4 4.3 8.5 10.4 11 12 9.5

20-22 LST 12.7 10.9 9 13.1 10.9 10.4 5.4 6.8 11 12.4 11.7 11.2 10.4

23-01 LST 14.3 10.5 11.8 15 12.9 12 10 8.6 12.7 14.5 14.4 12.6 12.4

02-04 LST 14.5 11.8 15 19.1 18.9 18.9 18.4 15.1 17.2 17.7 15.8 14 16.4

05-07 LST 16.3 13.3 15.8 21.7 20.4 21.1 18.8 22 21.9 20.6 19 15.2 18.9

08-10 LST 16.4 14.5 12.6 17.6 12.9 12.4 9 9.4 9 16 15.4 13.2 13.2

11-13 LST 14.3 12.7 9.8 13.7 10.1 8.6 4.8 5.9 5.9 9.5 11.4 11.5 9.8

14-16 LST 13.4 10.9 9.1 11.3 9 7 4.8 4 6.6 8.9 9.5 9 8.6

All Hours 14.4 12 11.5 15.2 13.1 12.4 9.6 9.5 11.6 13.7 13.5 12.3 12.4

% Frequency of Ceiling & Visibility < 3000.00 FT / 3.00 MI Weather Occurrence Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann

17-19 LST 16.3 14.6 13.4 16 14.5 11.5 7.3 9.3 11.7 14.8 15.3 16.5 13.4

20-22 LST 16 12.4 13.9 19.1 14.5 14.2 8.7 12.9 14.2 15 16.7 15.2 14.4

23-01 LST 19.4 12.6 15 21.2 16.7 16.7 13.4 13.3 16.3 18.3 19.5 16.5 16.6

02-04 LST 18.3 15.3 17.8 23.9 23.5 23.7 22.2 18.4 22.2 22.8 18.4 19.5 20.5

05-07 LST 19.8 15.5 20 24.2 24.6 25.2 22.9 26 26.6 24.6 21.3 19.1 22.5

08-10 LST 19.4 16.8 19.8 22.2 19.7 21.3 14.5 17.2 19.4 20.1 19 18.4 19

11-13 LST 18.6 16.2 15.5 19.7 14.7 15.5 10.4 12.5 12.9 15.8 16.2 16.3 15.3

14-16 LST 17.1 14.3 13.7 17.4 12.2 12.5 8.3 8.4 9.7 14.7 13.9 15.6 13.1

All Hours 18.1 14.7 16.1 20.5 17.5 17.6 13.5 14.7 16.6 18.3 17.5 17.1 16.8

LEGEND:

* - Data not Available # - Occurences rounded to zero $ - % Calm > prevailing direction T - Trace

Ad. 4 - OP. CLIM. DATA - Dover