Fairfield (IA)
September
Weather in Fairfield, Iowa for September 2026
Your guide to Fairfield weather in September - trends and predictions
In general, the average temperature in Fairfield at the beginning of September is 21.7 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 26.3 °F by the end of September.
With an average of 5 rainy days, Fairfield experiences minimal rainfall in September.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
25
Dry days
5
Rainy days
0
Snow days
26°/15°
Temperatures
17 km/h
Avg max wind
71 %
Avg humidity
Fairfield Weather September
Move between months or click on a day
Temperatures trend during September in Fairfield
See the weather trend as well as the moving average line
September weather in Fairfield day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Mist | 25° /14° | 0 mm | 6 | |
| Sept. 2 |  Cloudy | 24° /12° | 0 mm | 5 | |
| Sept. 3 |  Moderate or heavy rain shower | 19° /13° | 61.9 mm | 4 | |
| Sept. 4 | Mist | 21° /6° | 0 mm | 5 | |
| Sept. 5 |  Overcast | 22° /12° | 0 mm | 5 | |
| Sept. 6 | Cloudy | 20° /8° | 0 mm | 5 | |
| Sept. 7 |  Sunny | 21° /4° | 0 mm | 6 | |
| Sept. 8 | Overcast | 24° /12° | 0 mm | 5 | |
| Sept. 9 | Cloudy | 25° /12° | 0 mm | 6 | |
| Sept. 10 |  Light rain shower | 25° /13° | 3.4 mm | 6 | |
| Sept. 11 | Fog | 29° /16° | 0 mm | 6 | |
| Sept. 12 | Overcast | 32° /16° | 0 mm | 7 | |
| Sept. 13 |  Partly cloudy | 35° /20° | 0 mm | 9 | |
| Sept. 14 |  Thundery outbreaks possible | 33° /21° | 0.1 mm | 7 | |
| Sept. 15 | Thundery outbreaks possible | 32° /22° | 0 mm | 7 | |
| Sept. 16 |  Patchy light rain with thunder | 31° /18° | 6.7 mm | 7 | |
| Sept. 17 | Sunny | 31° /16° | 0 mm | 8 | |
| Sept. 18 | Partly cloudy | 31° /17° | 0 mm | 8 | |
| Sept. 19 | Fog | 24° /17° | 9 mm | 5 | |
| Sept. 20 | Moderate or heavy rain shower | 18° /16° | 31.2 mm | 4 | |
| Sept. 21 | Fog | 25° /17° | 0 mm | 6 | |
| Sept. 22 | Patchy rain possible | 24° /16° | 0 mm | 5 | |
| Sept. 23 | Fog | 24° /18° | 0 mm | 5 | |
| Sept. 24 | Overcast | 22° /15° | 0 mm | 5 | |
| Sept. 25 | Mist | 21° /12° | 0 mm | 5 | |
| Sept. 26 | Fog | 27° /12° | 0 mm | 6 | |
| Sept. 27 | Sunny | 28° /13° | 0 mm | 7 | |
| Sept. 28 | Mist | 29° /16° | 0 mm | 6 | |
| Sept. 29 | Partly cloudy | 29° /15° | 0 mm | 7 | |
| Sept. 30 | Overcast | 28° /15° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Fairfield in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Fairfield forecast closer to your planned date for the most up-to-date weather information.
Change Month
Fairfield in September - FAQ
What are the expected maximum and minimum temperatures in Fairfield during September?
During September, expect a variety of temperatures with highs around 26° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Fairfield during September?
Significant rainfall exceeding 112.3 mm is expected in Fairfield during September, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Fairfield during September?
The average wind speed in Fairfield during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Fairfield
Explore the daily rainfall trends and prepare for Fairfields September weather 💧
UV exposure in Fairfield during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
More Fairfield weather pages
You are here
Where is Fairfield?Get accurate weather forecasts for Fairfield, located at latitude 41.009 and longitude -91.963. Stay updated with localized weather information tailored for Fairfield.
Found a mistake?
We appreciate your attention to details. Tell us here.