The autumn season in Eastern Oklahoma and Northwest
Arkansas is a pleasantly long transition period between
the summer heat and the winter chill. Although extremes
of occasional 100 degree days are possible in early
September and nights in the teens are possible in late
November, most of the time the weather is accommodating
with a large number of mild, sunny days and cool, fair
nights. Thunderstorms do occur from time-to-time, but are
not as frequent as during the spring and summer months.
Arctic fronts begin to return to the region by mid-autumn
and can bring large contrasts in temperature over a short
time. The occurrence of snow is rare, although light
amounts have been recorded over the years in October and
November.
The following tables
summarize the kind of weather usually seen during the
autumn months and the weather extremes the area has
experienced in years gone by. Also, don't forget that...
Autumn officially begins on Friday,
September 22nd, 2006
at 11:03 PM CDT
and that...
Daylight Savings Time ends on Sunday,
October 29th, 2006 at 2 AM
(when we turn clocks back one hour to 1 AM)
AUTUMN
CLIMATOLOGY
TULSA
FORT
SMITH
Sep
Oct
Nov
Sep
Oct
Nov
Average High Temperature
84
74
60
85
75
61
Average Low Temperature
63
51
39
63
51
39
Average Mean Temperature
74
63
50
74
63
51
Record High Temperature
109
98
89
109
96
86
Record Low Temperature
35
15
10
33
22
8
Average Days Above 90 Degrees
9
1
0
10
2
0
Average Days Below 32 Degrees
0
0
7
0
1
8
Average Snowfall
0
Trace
0.6
0
Trace
0.5
Record Snowfall *
0
0.3
5.6
0
Trace
4.7
Earliest Measurable Snowfall
October
29 (0.3")
November
2 (2.0")
Average Rainfall
4.76
4.05
3.47
3.61
3.94
4.80
Record Rainfall *
18.81
16.51
8.29
10.49
12.05
14.01
Record Rainfall in 24 hours *
6.39
5.80
5.14
3.95
5.90
6.91
Record Least Rainfall *
0
Trace
Trace
0.05
0.00
0.26
Average Number of Rain Days
7
5
6
8
7
7
Average Thunderstorm Days
5
3
2
5
3
3
Average Wind Speed (in mph)
8.8
9.2
10.0
6.5
6.7
7.7
Average Sunshine
68%
65%
56%
66%
65%
55%
Mid-Month Time Of Sunrise
706 am
731 am
701 am
700 am
724 am
653 am
Mid-Month Time Of Sunset
732 pm
647 pm
516 pm
726 pm
642 pm
511 pm
Average Heating Degree Days
23
148
451
23
145
448
Average Cooling Degree Days
269
67
6
275
61
5
Avg. Date of First Killing Frost
November
3
November
9
Earliest Freezing Temp. Recorded
October
8
October
8
Temperatures
are reported in Fahrenheit
Rainfall and snowfall totals are reported in inches
* Snowfall and rainfall records for Fort Smith since 1945
See
climate data for each station for time period of record.
AUTUMN
CLIMATOLOGY
MCALESTER
FAYETTEVILLE
Sep
Oct
Nov
Sep
Oct
Nov
Average High Temperature
86
76
62
81
70
57
Average Low Temperature
63
51
41
59
47
37
Average Mean Temperature
74
64
52
70
59
47
Record High Temperature
110
99
85
103
96
82
Record Low Temperature
34
19
9
31
17
4
Average Days Above 90 Degrees
9
1
0
9
0
0
Average Days Below 32 Degrees
0
0
7
0
5
17
Average Snowfall
0
Trace
0.3
0
Trace
0.7
Average Rainfall
4.66
4.59
3.98
4.49
3.77
3.73
Mid-Month Time Of Sunrise
706 am
729 am
658 am
659 am
723 am
653 am
Mid-Month Time Of Sunset
730 pm
647 pm
517 pm
725 pm
640 pm
509 pm
Average Heating Degree Days
20
112
414
42
217
536
Average Cooling Degree Days
296
65
9
190
26
2
Avg. Date of First Killing Frost
November
3
October
17
Earliest Freezing Temp. Recorded
October
8
September
27
Temperatures
are reported in Fahrenheit
Rainfall and snowfall totals are reported in inches
See
climate data for each station for time period of record.
National Weather Service
Tulsa, OK
10159 E. 11th St. Suite 300
Tulsa, OK 74128
918-838-7838
Page Author: WFO Tulsa, OK
Web Master's Email:sr-tsa.webmaster@noaa.gov
Page last modified:
January 12, 2006
www.srh.weather.gov 
National Weather Service Forecast Office
