Waterloo (IA)
August
Weather in Waterloo, Iowa for August 2025
Your guide to Waterloo weather in August - trends and predictions
In general, the average temperature in Waterloo at the beginning of August is 26.7 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 29.9 °F by the end of August.
The climate of Waterloo in August is notably wet, with an average of 13 rainy days, and a total of 105.7 mm of precipitation.
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Temperatures
Rain 🌧️
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18
Dry days
13
Rainy days
0
Snow days
26°/16°
Temperatures
19 km/h
Avg max wind
81 %
Avg humidity
Waterloo Weather August
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Temperatures trend during August in Waterloo
See the weather trend as well as the moving average line
August weather in Waterloo day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Patchy rain possible | 26° /20° | 6.8 mm | 6 | |
| Aug. 2 | Patchy rain possible | 28° /18° | 0.2 mm | 6 | |
| Aug. 3 |  Sunny | 27° /18° | 0 mm | 7 | |
| Aug. 4 | Patchy rain possible | 30° /18° | 10.9 mm | 7 | |
| Aug. 5 |  Partly cloudy | 30° /20° | 0.3 mm | 8 | |
| Aug. 6 |  Overcast | 23° /16° | 0 mm | 5 | |
| Aug. 7 | Partly cloudy | 23° /12° | 0 mm | 6 | |
| Aug. 8 | Patchy rain possible | 22° /14° | 0.1 mm | 5 | |
| Aug. 9 | Overcast | 19° /10° | 0 mm | 4 | |
| Aug. 10 | Partly cloudy | 20° /10° | 0 mm | 6 | |
| Aug. 11 | Partly cloudy | 23° /12° | 0 mm | 6 | |
| Aug. 12 |  Moderate or heavy rain shower | 20° /15° | 5 mm | 5 | |
| Aug. 13 | Partly cloudy | 24° /13° | 0 mm | 6 | |
| Aug. 14 | Moderate rain at times | 24° /15° | 17.4 mm | 5 | |
| Aug. 15 | Moderate or heavy rain shower | 27° /19° | 11.7 mm | 6 | |
| Aug. 16 | Moderate or heavy rain shower | 26° /17° | 6.2 mm | 6 | |
| Aug. 17 | Moderate or heavy rain shower | 24° /17° | 3.6 mm | 5 | |
| Aug. 18 | Patchy rain possible | 25° /15° | 0.2 mm | 6 | |
| Aug. 19 | Overcast | 25° /15° | 0 mm | 6 | |
| Aug. 20 | Patchy rain possible | 24° /15° | 0.2 mm | 5 | |
| Aug. 21 | Sunny | 22° /12° | 0.2 mm | 6 | |
| Aug. 22 | Partly cloudy | 23° /11° | 0 mm | 6 | |
| Aug. 23 | Partly cloudy | 25° /13° | 0 mm | 7 | |
| Aug. 24 | Patchy rain possible | 30° /18° | 0.2 mm | 7 | |
| Aug. 25 |  Cloudy | 30° /21° | 1.2 mm | 7 | |
| Aug. 26 | Cloudy | 34° /23° | 8.6 mm | 7 | |
| Aug. 27 | Partly cloudy | 32° /22° | 0 mm | 8 | |
| Aug. 28 | Sunny | 30° /21° | 3.8 mm | 8 | |
| Aug. 29 | Moderate or heavy rain shower | 31° /20° | 10.3 mm | 7 | |
| Aug. 30 | Overcast | 26° /16° | 18.9 mm | 6 | |
| Aug. 31 | Sunny | 26° /13° | 0 mm | 7 | |
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Important Notice
Our weather forecast for Waterloo in August 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 Waterloo forecast closer to your planned date for the most up-to-date weather information.
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Waterloo in August - FAQ
What are the expected maximum and minimum temperatures in Waterloo during August?
During August, expect a variety of temperatures with highs around 26° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Waterloo during August?
Significant rainfall exceeding 105.7 mm is expected in Waterloo during August, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Waterloo during August?
The average wind speed in Waterloo during August is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Waterloo
Explore the daily rainfall trends and prepare for Waterloos August weather 💧
UV exposure in Waterloo during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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