September weather forecastMarfa, TX
September
Weather in September
With the arrival of September, Marfa steps into the transitioning phase from summer to fall. The weather is dominated by lower daytime temperatures, and residents start noticing a decrease in humidity. The changes in the weather pattern make September the rainiest month of the year, with precipitation escalating to 2.64" (67mm). Concurrently, cloud cover starts increasing, hinting at the end of the sun-drenched summer days. September's weather signifies the onset of cooler months, setting the stage for Marfa's scenic autumn.Temperature
As Marfa enters September, the average high-temperature subtly lowers from the 85.6°F (29.8°C) of August to a still moderately hot 79.2°F (26.2°C). During September, Marfa witnesses a consistent average low-temperature of 61.2°F (16.2°C).Humidity
The most humid month is September, with an average relative humidity of 58%.Rainfall
The month with the most rainfall is September, when the rain falls for 14.4 days and typically aggregates up to 2.64" (67mm) of precipitation.Snowfall
In Marfa, snow does not fall in April through September.Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:33 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 7:42 pm CDT.
Sunshine
In Marfa, the average sunshine in September is 9.4h.UV index
The average daily maximum UV index in September in Marfa is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Act with care - The suggestion to avoid sunburn is emphasized. To guard against the harmful effects of the Sun, minimize exposure during midday. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Marfa, TX
- Average high temperature in September: 79.2°F
The warmest month (with the highest average high temperature) is June (88.3°F).
The month with the lowest average high temperature is January (55.2°F).
- Average low temperature in September: 61.2°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (35.8°F).
Average pressure in September
Marfa, TX
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Marfa, TX
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest months (with the lowest average wind speed) are August and September (7.3mph).
Average humidity in September
Marfa, TX
- Average humidity in September: 58%
The month with the highest relative humidity is September (58%).
The month with the lowest relative humidity is April (28%).
Average rainfall in September
Marfa, TX
- Average rainfall in September: 2.64"
The wettest month (with the highest rainfall) is September (2.64").
The driest month (with the least rainfall) is February (0.2").
Average rainfall days in September
Marfa, TX
- Average rainfall days in September: 14.4 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in September
Marfa, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Marfa, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.5 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Marfa, TX
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 7h and 48min).
Average sunshine days in September
Marfa, TX
- Average sunshine days in September: 12.6 days
The months with the most sunshine days are January and December (26.5 days).
The month with the least sunshine days is July (12.5 days).
Average UV index in September
Marfa, TX
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Marfa, TX
- Average cloud cover in September: 24
The month with the most cloud cover is September (Cloud cover 24).
The month with the least cloud cover is May (Cloud cover 12).
Average visibility in September
Marfa, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
