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
Colfax's September weather shows a modest shift in high-temperatures, falling from August's 80.8°F (27.1°C) to a still warm 74.8°F (23.8°C). Throughout September, Colfax experiences a low-temperature average of 55.9°F (13.3°C).Humidity
The average relative humidity in September in Colfax is 77%.Rainfall
In Colfax, in September, during 10.1 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In Colfax, during the entire year, the rain falls for 104.4 days and collects up to 10.71" (272mm) of precipitation.Snowfall
June through September are months without snowfall in Colfax.Daylight
The average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:39 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:55 pm CDT.
Sunshine
In Colfax, the average sunshine in September is 9.5h.UV index
In Colfax, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. To guard against the harmful effects of the Sun, minimize exposure during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Colfax?
What is the average humidity in September in Colfax?
How much does it rain in Colfax in September?
When it does not snow in Colfax?
Does it snow in Colfax in September?
How many hours of daylight does Colfax have in September?
What time are sunrise and sunset in September in Colfax?
How long on average sun shines in September in Colfax?
How high is the UV index in September in Colfax?
Average temperature in September
Colfax, IA
- Average high temperature in September: 74.8°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in September: 55.9°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in September
Colfax, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Colfax, IA
- Average wind speed in September: 8mph
The windiest months (with the highest average wind speed) are January and April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in September
Colfax, IA
- Average humidity in September: 77%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Colfax, IA
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is May (1.81").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in September
Colfax, IA
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is May (14 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Colfax, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Colfax, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Colfax, IA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Colfax, IA
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is December (22.5 days).
The month with the least sunshine days is June (12.1 days).
Average UV index in September
Colfax, IA
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in September
Colfax, IA
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and September (Cloud cover 29).
Average visibility in September
Colfax, 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).
Colfax, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location