The Weather Network
Weather
Maps
News
Video
|
Welcome
Monthly
⋮
Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Lewisville, TX
Content continues below
September
Average Temperature
High
32°
Feels 34
Low
21°
Feels 22
Average Precipitation
6 Days
Rain amount
56.1mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
36°
21
33°
22
33°
23
33°
24
32°
25
32°
26
32°
27
33°
28
31°
29
27°
30
27°
Forecast
Sunday, September 20, 2026
Day
36°
Feels 38
Wind
20 km/h S
Gust
31 km/h
Humidity
37%
P.O.P
40%
Rain
~1 mm
Night
24°
Feels 25
Wind
19 km/h W
Gust
29 km/h
Humidity
88%
P.O.P
80%
Rain
15-20 mm
Historical Averages
Sep 20
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.