Dallas
Texas, USA
Long-term weather forecast
Long-term weather forecast
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September weather forecast and Climate
Dallas, TX

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Dallas, Texas, modern city skyscrapers viewed from above, just before sunset
Dallas, Texas, modern city skyscrapers viewed from above, just before sunset
September remains hot throughout but experiences a slight drop in the temperature to the range of 69.1°F (20.6°C) and 88.7°F (31.5°C). The summer scorch is still on and outdoors remains uncomfortable, but the evenings are cool and lovely and more crowds are experienced more during the evenings.
Rainfall comes in the afternoons for approximately five days and collects 2.8" (71.1mm) in precipitation. A light dressing is advised, as is using the shades since the UV index is still high.
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  • The average high temperature in September: 88.7°F

The warmest month (with the highest average high temperature) is August (96.4°F).
The month with the lowest average high temperature is January (56.8°F).

  • The average low temperature in September: 69°F

The month with the highest average low temperature is August (76.8°F).
The coldest month (with the lowest average low temperature) is January (37.3°F).

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  • The average humidity in September: 66.5%

The month with the highest relative humidity is May (69.7%).
The month with the lowest relative humidity is August (59.5%).

  • The average rainfall in September: 2.8"

The wettest month (with the highest rainfall) is May (4.9").
The driest month (with the lowest rainfall) is August (1.9").

  • The average rainfall days in September: 5.3 days

The month with the highest number of rainy days is May (9.7 days).
The month with the lowest number of rainy days is August (4.6 days).

  • The average snowfall in September: 0"

The month with the highest snowfall is February (0.6").
Months with the lowest snowfall are April, May, June, July, August, September, October and November (0").

  • The average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.5 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September and October (0 days).

  • The average daylight in September: 12h

Months with the longest days are May, June and July (Average daylight: 14h).
Months with shortest days are January, November and December (Average daylight: 10h).

  • The average sunshine in September: 8.2h

The month with most sunshine is July (Average sunshine: 10.7h).
The month with least sunshine is December (Average sunshine: 5.6h).

  • The average UV index in September: 8

Months with the highest UV index are May, June, July and August (UV index 10).
Months with the lowest UV index are January and December (UV index 3).

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