Last updated: June 24, 2025
In Annawan, United States, the average temperature in September hovers around 20°C (69°F), but variations can be significant; expect minimums of 4°C (40°F) and maximums reaching 35°C (95°F). This month, the precipitation totals around 111 mm (4.4 in) over approximately 10 days, contributing to an average humidity level of 78%. Stay prepared for a diverse climate!
In September in Annawan, the average temperature is 20°C (69°F). Maximums can reach 35°C (95°F), and minimums can be as low as 4°C (40°F). This weather makes Annawan an ideal destination for travelers seeking both warmth and cool, refreshing evenings.
In Annawan in September, the precipitation amount is 111 mm (4.4 in) over a span of 10 days.
In Annawan in September, humidity is 78%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick and heavy, urging you to seek out shaded areas and refreshing drinks.
In Annawan 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 Annawan.
UV Risk Categories
Weather in Annawan varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Annawan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 56 mm (2.2 inches) | 81% | moderate |
| February Weather | -3°C (27°F) | 59 mm (2.3 inches) | 81% | moderate |
| March Weather | 5°C (40°F) | 95 mm (3.7 inches) | 81% | high |
| April Weather | 10°C (50°F) | 113 mm (4.5 inches) | 82% | very high |
| May Weather | 17°C (63°F) | 151 mm (5.9 inches) | 78% | very high |
| June Weather | 23°C (73°F) | 146 mm (5.7 inches) | 81% | very high |
| July Weather | 25°C (77°F) | 88 mm (3.4 inches) | 79% | very high |
| August Weather | 23°C (74°F) | 69 mm (2.7 inches) | 77% | very high |
| September Weather | 20°C (69°F) | 111 mm (4.4 inches) | 78% | very high |
| October Weather | 12°C (55°F) | 120 mm (4.7 inches) | 78% | high |
| November Weather | 4°C (39°F) | 52 mm (2.0 inches) | 87% | moderate |
| December Weather | 0°C (33°F) | 48 mm (1.9 inches) | 84% | low |