Last updated: June 24, 2025
In Marengo, United States, the average temperature in September hovers around 19°C (67°F), making for a pleasant climate. Expect temperatures to range from a cool 2°C (35°F) to a warm 33°C (92°F). During this month, you can anticipate approximately 99 mm (3.9 in) of precipitation spread across 10 days, contributing to an average humidity level of 79%. Whether you're soaking up the sun or dancing in the rain, September offers a unique experience!
In September in Marengo, the average temperature is 19°C (67°F), with maximums hitting 33°C (92°F) and minimums dropping to 2°C (35°F). This varied climate makes it a great time to explore Marengo, so be sure to pack for both warm days and cooler evenings.
In Marengo in September, the total precipitation amount is 99 mm (3.9 in) spread over a period of 10 days.
In Marengo in September, humidity is 79%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that makes traveling a bit more challenging, as the air is thick and can leave you feeling sluggish during outdoor adventures.
In Marengo in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Marengo.
UV Risk Categories
Weather in Marengo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Marengo, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 61 mm (2.4 inches) | 85% | moderate |
| February Weather | -4°C (26°F) | 59 mm (2.3 inches) | 85% | moderate |
| March Weather | 3°C (38°F) | 72 mm (2.8 inches) | 85% | high |
| April Weather | 8°C (47°F) | 112 mm (4.4 inches) | 85% | very high |
| May Weather | 15°C (60°F) | 162 mm (6.4 inches) | 78% | very high |
| June Weather | 21°C (71°F) | 119 mm (4.7 inches) | 80% | very high |
| July Weather | 24°C (75°F) | 92 mm (3.6 inches) | 78% | very high |
| August Weather | 22°C (72°F) | 92 mm (3.6 inches) | 76% | very high |
| September Weather | 19°C (67°F) | 99 mm (3.9 inches) | 79% | very high |
| October Weather | 11°C (53°F) | 121 mm (4.8 inches) | 83% | moderate |
| November Weather | 3°C (38°F) | 51 mm (2.0 inches) | 88% | moderate |
| December Weather | 0°C (32°F) | 53 mm (2.1 inches) | 81% | low |