Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September brings a slight decrease in the average high-temperature, shifting from a moderately hot 81.3°F (27.4°C) in August to a still warm 75.7°F (24.3°C). Tracy witnesses an average low-temperature of 56.1°F (13.4°C) throughout the month of September.Humidity
The average relative humidity in September is 77%.Rainfall
In September, the rain falls for 9.6 days. Throughout September, 1.34" (34mm) of precipitation is accumulated. Throughout the year, in Tracy, there are 109.6 rainfall days, and 12.28" (312mm) of precipitation is accumulated.Snowfall
In Tracy, Iowa, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:38 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:54 pm CDT.
Sunshine
In Tracy, the average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The UV index of 4 during September leads to these advisories:
Put precautions into practice - Guidance to elude sunburn is provided. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Tracy?
What is the average humidity in September in Tracy?
How many days does it rain in September in Tracy?
When it does not snow in Tracy?
Does it snow in Tracy in September?
How many hours of daylight does Tracy have in September?
When is the sunrise / sunset in September in Tracy?
How many hours of sunshine does Tracy have in September?
What is the UV index reading in September in Tracy?
Average temperature in September
Tracy, IA
- Average high temperature in September: 75.7°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in September: 56.1°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in September
Tracy, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Tracy, IA
- Average wind speed in September: 8mph
The windiest months (with the highest average wind speed) are March and April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in September
Tracy, IA
- Average humidity in September: 77%
The months with the highest relative humidity are January, February, June and July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Tracy, IA
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is May (2.09").
The driest months (with the least rainfall) are January and February (0.43").
Average rainfall days in September
Tracy, IA
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Tracy, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.81").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Tracy, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Tracy, IA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Tracy, IA
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is December (21.9 days).
The month with the least sunshine days is June (12.4 days).
Average UV index in September
Tracy, IA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Tracy, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and September (Cloud cover 30).
Average visibility in September
Tracy, IA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Tracy, Iowa, USA
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