Climatological Report (Monthly)
Issued by NWS
Issued by NWS
662
CXUS52 KKEY 012004
CLMMTH
CLIMATE REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
404 PM EDT TUE SEP 1 2026
...................................
...THE MARATHON CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2026...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1950 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 98 08/10/1987
08/15/1964
08/22/1952
LOW 67 08/27/1957
HIGHEST 91 08/18 93 08/20
08/19
08/26
08/22
08/30
LOWEST 76 08/12 75 08/07
AVG. MAXIMUM 89.9 91.6 -1.7 90.6
AVG. MINIMUM 81.9 79.7 2.2 81.2
MEAN 85.9 85.6 0.3 85.9
DAYS MAX >= 90 22 27.4 -5.4 25
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.0 0.0 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 13.12 2008
MINIMUM 1.40 1990
TOTALS 0.51R 5.32 -4.81 3.48
DAILY AVG. 0.02 0.17 -0.15 0.11
DAYS >= .01 8 14.3 -6.3 11
DAYS >= .10 1 8.1 -7.1 6
DAYS >= .50 0 3.2 -3.2 1
DAYS >= 1.00 0 1.4 -1.4 1
GREATEST
24 HR. TOTAL 0.21 08/09 TO 08/09
DEGREE DAYS
HEATING TOTAL 0 0 0 0
SINCE 7/1 0 0 0 0
COOLING TOTAL 657 640 17 657
SINCE 1/1 3473 3470 3 3548
................................................................
WIND (MPH)
AVERAGE WIND SPEED 7.0
HIGHEST WIND SPEED/DIRECTION 24/170 DATE 08/14
HIGHEST GUST SPEED/DIRECTION 39/170 DATE 08/14
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.15
NUMBER OF DAYS FAIR 31
NUMBER OF DAYS PC 0
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 74
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 14 MIXED PRECIP 0
HEAVY RAIN 4 RAIN 1
LIGHT RAIN 11 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 1 FOG W/VIS <= 1/4 MILE 0
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$
MARATHON DAILY RECORDS, AUGUST 2026 AND 2026
RECORD AUG 2026 2026
====== ======== ========
MAXIMUM TEMPERATURE 0 0
COOL MAXIMUM TEMPERATURE 0 7
WARM MINIMUM TEMPERATURE 3 17
MINIMUM TEMPERATURE 0 2
RAINFALL 0 2
TOP 10 DRIEST AUGUSTS ON RECORD FOR MARATHON
RANKING YEAR TOTAL (IN.)
======= ==== ===========
1 2026 0.51 <---
2 1990 1.40
3 1975 1.44*
4 1987 1.67
5 2020 1.78
6 1970 1.87
7 1993 1.93
8 2004 1.97
1952 1.97
10 2013 2.18
1956 2.18
*NOTE: AUGUST 1975 IS MISSING RAINFALL OBSERVATIONS
FOR THE 1ST THROUGH 5TH. DURING THIS 5-DAY PERIOD
KEY WEST RECORDED 0.05 INCHES OF RAINFALL.
TOP 10 DRIEST SUMMERS ON RECORD FOR MARATHON
RANKING YEAR TOTAL (IN.)
======= ==== ===========
1 1956 4.20
2 1993 4.57
3 2026 5.02 <---
4 1987 5.44
5 1961 5.77
6 2015 7.15
7 2004 7.40
8 1998 7.57
9 1996 7.75
10 1950 7.76
ROSS