540
CDUS43 KILX 210638
CLIMTO
CLIMATE REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
138 AM CDT MON SEP 21 2026
...............................
..THE MATTOON IL AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 20 2026
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1998 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 89 238 PM MM MM 78 11 87
MINIMUM 69 1115 PM MM MM 55 14 63
AVERAGE 79 66 13 75
PRECIPITATION (IN)
YESTERDAY 0.17 MM MM 0.09 0.08 T
MONTH TO DATE 0.25 1.94 -1.69 0.08
SINCE SEP 1 0.25 1.94 -1.69 0.08
SINCE JAN 1 34.41 27.11 7.30 24.27
DEGREE DAYS
HEATING
YESTERDAY 0 2 -2 0
MONTH TO DATE 0 23 -23 20
SINCE SEP 1 0 23 -23 20
SINCE JUL 1 0 27 -27 24
COOLING
YESTERDAY 14 4 10 10
MONTH TO DATE 291 106 185 117
SINCE SEP 1 291 106 185 117
SINCE JAN 1 1311 1064 247 1158
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 8.4
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
HEAVY RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 1000 PM
LOWEST 45 200 PM
AVERAGE 71
......................................................
THE MATTOON IL AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 77 MM MM
MINIMUM TEMPERATURE (F) 54 MM MM
SUNRISE AND SUNSET
SEPTEMBER 21 2026.....SUNRISE 640 AM CDT SUNSET 652 PM CDT
SEPTEMBER 22 2026.....SUNRISE 641 AM CDT SUNSET 650 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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