Climatology

 

Operational Climatic Data Summary

STATION: FT KNOX/GODMAN AAF KENTUCKY    STATION #: 724240             ICAO: KFTK
LOCATION: 3754N   8558W                 ELEVATION (FEET):  755        LST = GMT  -5
PREPARED BY: AFCCC/DOO, JUL 1998        PERIOD: 7301-9712
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Source No. JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1. TEMPERATURE (F)
EXTREME MAX 70 75 84 93 95 101 104 101 99 87 80 76 104
MEAN DAILY MAX 40 45 56 67 75 83 87 86 79 68 57 45 66
MEAN 33 37 47 56 65 73 77 76 69 58 47 37 56
MEAN DAILY MIN 26 30 38 47 55 64 69 67 61 49 41 31 48
EXTREME MIN -25 -10 -1 21 31 39 49 47 34 24 13 -15 -25
# DAYS GE 90 0 0 0 # 1 4 10 8 2 0 0 0 25
# DAYS LE 32 20 15 9 2 # 0 0 0 0 1 7 16 70
# DAYS LE 0 2 1 # 0 0 0 0 0 0 0 0 # 4
 
2. PRECIPITATION (INCHES)
MAXIMUM 14.7 13.2 13.8 10.9 12.7 10.5 9.6 9.5 12.4 7.5 8.9 10.8 72.0
MEAN 2.9 3.4 4.2 3.5 5.1 3.4 4.0 3.1 2.9 2.6 4.0 4.0 43.1
MINIMUM 0.4 0.4 1.1 1.0 0.8 0.5 0.6 0.1 0.1 0.1 0.7 0.8 29.5
MAX 24 HR 3.2 4.9 7.5 4.2 4.4 3.7 3.6 3.6 4.4 4.3 3.2 4.5 7.5
# DAYS GE .004 11 10 11 11 11 9 8 7 7 8 10 10 113
# DAYS GE .5 2 2 3 2 4 2 2 2 2 2 3 3 29
 
3. SNOWFALL (INCHES)
MEAN 5.5 3.9 2.8 0.1 0 0 0 0 0 # 1.1 1.9 15.3
MAXIMUM 24.5 13.0 19.1 1.4 # 0 0 0 0 2.2 17.5 11.1 42.9
MAX 24 HR 14.6 9.2 9.0 0.9 # 0 0 0 0 2.2 14.3 4.8 14.6
# DAYS GE 0.1 14 11 7 1 0 0 0 0 0 # 3 6 42
# DAYS GE 1.5 * * * * * * * * * * * * *
 
4. MEAN RELATIVE HUMIDITY (%) / VAPOR PRESSURE (IN HG) / DEWPOINT (F)
RH ( 6 LST) 75 74 74 74 81 85 88 88 86 82 76 76 80
RH (16 LST) 61 57 52 47 53 55 56 55 53 50 57 61 55
VAPOR PRESS .14 .16 .22 .29 .43 .58 .68 .65 .52 .34 .24 .18 .37
DEWPOINT 23 26 34 41 53 62 67 65 58 46 36 28 45
 
5. SURFACE WINDS 16 PT/KTS / 99.95% HIGHEST PRESSURE ALTITUDE (FEET)
PVLG DRCTN W $W $S $W $SSW $SSW $SW $SSW $SSW $S $SSW $W $SSW
MEAN SPD (PVLG DIR) 8 8 8 8 6 5 5 5 5 6 7 7 7
MEAN SPD (ALL OBS) 6 6 6 6 5 4 3 3 3 4 5 6 5
MAX PEAK GUST 57 43 56 45 39 66 48 49 41 58 66 49 66
PRESSURE ALT 1551 1419 1531 1413 1231 1091 951 983 1063 1287 1364 1461 1551
 
6. MEAN CLOUD COVER (8THS) / THUNDERSTORMS / FOG / BLOWING SAND & DUST (BNBD)
CLD COVER 6 5 5 5 5 4 4 4 4 4 5 6 5
DAYS TSTMS 1 1 3 4 8 9 9 8 4 2 2 1 52
DAYS FOG LT 7 16 14 14 11 16 18 20 23 19 14 14 14 193
DAYS BNBD LT 7 0 0 0 0 0 0 0 0 0 0 0 0 0
 
7. PERCENTAGE FREQUENCY OF OCCURRENCE (% FREQ) OF CEILING AND/OR VISIBILITY (CIG/VIS) LT 3000/3 STATUTE MILES (MI) (SOURCE NO. 1)
00-02 LST 37 28 21 12 10 8 6 6 10 14 25 35 18
03-05 LST 37 32 22 16 16 16 13 16 16 18 26 35 22
06-08 LST 39 35 28 17 23 23 24 33 25 21 32 36 28
09-11 LST 39 34 28 16 19 16 14 15 18 18 32 36 24
12-14 LST 37 31 25 15 16 11 9 10 14 16 29 35 21
15-17 LST 35 29 23 13 13 5 6 6 9 13 26 33 18
18-20 LST 34 27 21 11 9 5 3 3 6 11 25 28 15
21-23 LST 34 26 21 11 8 5 4 4 7 10 25 31 16
ALL HOURS 37 30 24 14 14 11 10 12 13 15 28 34 20
 
8. % FREQ OF CIG/VIS LT 1500/3 MI (SOURCE NO. 1)
00-02 LST 23 17 14 7 6 7 5 5 8 11 14 21 11
03-05 LST 23 20 16 9 13 14 12 15 15 15 16 24 16
06-08 LST 25 22 19 11 19 21 22 32 22 18 21 24 21
09-11 LST 28 23 19 9 13 11 10 12 13 14 20 24 16
12-14 LST 25 20 15 6 9 4 4 5 7 10 17 22 12
15-17 LST 22 18 13 5 6 2 2 3 5 8 15 18 10
18-20 LST 21 18 12 6 5 3 2 2 4 8 14 17 9
21-23 LST 20 16 13 6 4 3 3 3 5 7 15 18 9
ALL HOURS 23 19 15 7 9 8 7 9 10 11 17 21 13
 
9. % FREQ OF CIG/VIS LT 1000/2 MI (SOURCE NO. 1)
00-02 LST 15 12 10 3 4 4 3 3 4 7 10 15 7
03-05 LST 16 14 10 5 8 8 7 7 9 10 11 16 10
06-08 LST 17 16 13 7 12 12 11 16 13 13 14 17 13
09-11 LST 19 16 13 6 7 5 5 6 7 8 14 17 10
12-14 LST 17 13 10 3 5 2 1 1 3 5 11 13 7
15-17 LST 14 12 7 3 4 1 1 1 3 5 9 13 6
18-20 LST 13 11 8 3 3 1 1 1 3 5 9 13 6
21-23 LST 13 11 9 3 2 1 1 1 3 5 9 13 6
ALL HOURS 16 13 10 4 6 4 4 5 6 7 11 15 8
 
10. % FREQ OF CIG/VIS LT 200/0.5 MI (SOURCE NO. 1)
00-02 LST 3 1 1 # # 1 # 1 1 1 # 2 1
03-05 LST 3 2 2 1 1 2 1 2 2 2 1 2 2
06-08 LST 3 3 2 1 1 1 1 2 2 2 1 2 2
09-11 LST 3 2 1 # 0 # 0 # # # 1 2 1
12-14 LST 1 1 1 0 0 0 0 0 0 0 # 1 #
15-17 LST 1 # # 0 # 0 # 0 0 0 # 1 #
18-20 LST 1 1 1 0 # 0 # 0 0 0 # 1 #
21-23 LST 1 1 1 0 # # 0 # 0 # # 1 #
ALL HOURS 2 1 1 # # # # 1 1 1 1 1 1
 
11. PERCENTAGE FREQUENCY OF OCCURRENCE (% FREQ) OF THUNDERSTORMS:
00-02 LST # # 2 2 3 3 3 2 1 1 1 # 1
03-05 LST 1 1 2 2 3 2 2 2 1 1 1 1 1
06-08 LST # # 1 2 3 2 2 2 2 1 1 # 1
09-11 LST 0 # 1 1 2 1 2 2 1 # 1 # 1
12-14 LST # # 1 1 2 3 3 2 1 # # # 1
15-17 LST # 1 1 2 4 6 6 5 2 1 1 # 2
18-20 LST # # 2 2 4 7 5 5 2 1 1 # 2
21-23 LST # # 2 2 4 4 4 3 2 1 1 # 2
ALL HOURS # # 1 2 3 3 4 3 2 1 1 # 2
 
12. % FREQ RAIN AND/OR DRIZZLE:
00-02 LST 11 12 13 12 9 5 3 3 6 8 13 15 9
03-05 LST 11 12 14 14 10 6 5 4 7 9 13 15 10
06-08 LST 10 12 13 12 11 6 5 5 8 10 16 16 10
09-11 LST 11 11 14 11 10 5 5 5 7 7 13 14 9
12-14 LST 11 10 12 11 10 6 4 5 6 7 11 13 9
15-17 LST 10 10 12 9 10 6 6 6 6 7 11 14 9
18-20 LST 10 11 14 11 8 6 5 5 5 8 13 15 9
21-23 LST 11 12 15 11 9 6 3 4 4 7 12 14 9
ALL HOURS 11 11 13 12 9 6 5 5 6 8 13 14 9
 
13. % FREQ SNOW AND/OR ICE PELLETS:
00-02 LST 10 8 3 # 0 0 0 0 0 1 1 7 3
03-05 LST 12 9 4 # # 0 0 0 0 1 2 7 3
06-08 LST 12 10 4 1 # 0 0 0 0 # 2 7 3
09-11 LST 14 11 4 1 0 0 0 0 0 # 2 7 3
12-14 LST 13 9 4 # 0 0 0 0 0 # 2 6 3
15-17 LST 12 7 4 # 0 0 0 0 0 # 2 5 3
18-20 LST 11 8 4 # 0 0 0 0 0 # 2 5 2
21-23 LST 10 8 4 # 0 0 0 0 0 # 2 6 3
ALL HOURS 12 9 4 # # 0 0 0 0 # 2 6 3
 
14. % FREQ OF SURFACE WIND SPEEDS GT 25 KTS. (INCLUDING GUSTS):
00-02 LST # # 1 1 # # 0 # # # 1 # #
03-05 LST 1 # 1 # 0 0 0 # # 0 # # #
06-08 LST 1 1 # # # 0 0 0 0 # # 1 #
09-11 LST 1 1 2 1 # 0 # 0 # # 1 1 1
12-14 LST 1 2 3 3 1 # # # # # 2 2 1
15-17 LST 1 2 2 3 1 # # # # # 1 1 1
18-20 LST 1 1 1 1 # # # # 0 0 # # #
21-23 LST # # 1 1 # # 0 0 # # # # #
ALL HOURS 1 1 1 1 # # # # # # 1 1 1
 
15. % FREQ OF CEILING AND/OR VISIBILITY (CIG/VIS) LT 800/2 MI:
00-02 LST 13 10 8 2 3 4 3 3 3 6 9 13 6
03-05 LST 14 13 9 4 7 8 6 7 8 9 10 14 9
06-08 LST 16 14 11 6 9 11 11 15 12 11 13 14 12
09-11 LST 16 14 10 4 5 4 4 5 5 7 12 15 8
12-14 LST 14 11 8 2 4 1 1 1 2 4 8 11 6
15-17 LST 12 10 6 1 3 # 1 1 2 3 7 11 5
18-20 LST 11 10 7 2 2 1 1 1 2 3 7 11 5
21-23 LST 11 10 7 2 2 1 1 1 3 3 8 12 5
ALL HOURS 13 12 8 3 4 4 3 4 5 6 9 13 7
 
16. % FREQ OF CIG/VIS LT 500/1.5 MI:
00-02 LST 8 6 5 1 1 2 2 2 2 3 4 8 4
03-05 LST 9 8 6 2 3 4 4 5 5 5 6 8 5
06-08 LST 11 9 7 2 5 6 6 9 8 8 7 9 7
09-11 LST 11 8 5 2 2 1 1 1 2 4 6 9 4
12-14 LST 9 6 3 1 1 # # # 1 1 3 7 3
15-17 LST 7 6 3 1 1 # # # 1 1 3 5 2
18-20 LST 6 6 4 1 1 1 # # 1 1 4 6 2
21-23 LST 7 6 4 1 1 # 1 1 1 2 4 6 3
ALL HOURS 8 7 5 1 2 2 2 2 2 3 5 7 4
 
17. % FREQ OF CIG/VIS LT 300/1 MI:
00-02 LST 4 2 2 # 1 1 1 1 1 2 2 4 2
03-05 LST 5 4 3 1 2 2 2 3 3 3 2 4 3
06-08 LST 6 5 4 1 2 4 3 5 4 4 3 4 4
09-11 LST 6 5 2 # # # # # 1 1 2 4 2
12-14 LST 4 3 1 # # # 0 0 0 # 1 2 1
15-17 LST 3 3 1 # # 0 # 0 # # 2 2 1
18-20 LST 4 3 2 # # # # 0 # # 1 2 1
21-23 LST 3 2 2 # # # # # # # 2 3 1
ALL HOURS 4 3 2 1 1 1 1 1 1 1 2 3 2
 
18. % FREQ OF CIG/VIS LT 100/.25 MI:
00-02 LST 1 # # # # 1 # 1 # 1 # 1 #
03-05 LST 1 1 1 # # 1 # 1 1 1 # 1 1
06-08 LST 1 2 1 1 1 1 1 2 1 2 1 1 1
09-11 LST 1 1 1 # 0 0 0 # # # 1 1 #
12-14 LST # # # 0 0 0 0 0 0 0 # # #
15-17 LST # # # 0 0 0 # 0 0 0 # # #
18-20 LST # # # 0 0 0 0 0 0 0 # # #
21-23 LST # # # 0 0 # 0 # 0 # # 0 #
ALL HOURS 1 1 1 # # # # # # # # 1 #
 

REMARKS:  * = DATA NOT AVAILABLE     # = LT 0.5 DAY, OR 0.05 INCH, OR 0.5%, ASAPPLICABLE
$ = % CALM GT PVLGN DRCTN
= BASED ONLY ON AVAILABLE DATA, I.E. LT 24 HRS/DAY, OR LT 12 MONTH/YR
ANNUAL TOTALS MAY NOT EQUAL THE SUM OF MONTHLY TOTALS DUE TO ROUNDING

SOURCE(S):  1.  AFCCC DATSAV DATABASE, 7301-9712, 209764 TOTAL OBS USED

CONTACT INFORMATION

Fort Knox
Weather Operations

5220 Pilot Street
Fort Knox, Kentucky 40121

Fax: (502) 624-6156



Station Manager
Telephone: (502) 624-4869
DSN: 464-4869

Duty Forecaster
Telephone: (502) 624-5653
DSN: 464-5653