Aurora, Illinois Climate by Month
Aurora, Illinois, United States
Warm summers and freezing winters, with rain spread through the year.
The climate in Aurora is one of warm summers and freezing winters, with rain spread through the year. Expect highs of 85°F (30°C) in July and 32°F (0°C) in January, with the coldest nights (January) near 15°F (-9°C). About 40 in (1005 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 85°F(30°C)
- Average high, July
- Coldest nights
- 15°F(-9°C)
- Average low, January
- Rain per year
- 40 in(1005 mm)
- No clear rainy season
- Humidity
- 73%
- Sunniest: July
Best and worst months in Aurora
Best for weatherThe most comfortable weather comes in September, with highs around 77°F (25°C) and about 3.6 in (92 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 32°F (0°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Aurora weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 32°F(0°C) | 15°F(-9°C) | 1.8 in(46 mm) | 93% | 1.4 |
| FebFebruary | 37°F(3°C) | 19°F(-7°C) | 1.7 in(42 mm) | 78% | 2.5 |
| MarMarch | 48°F(9°C) | 29°F(-2°C) | 2.3 in(58 mm) | 75% | 3.6 |
| AprApril | 61°F(16°C) | 38°F(4°C) | 4.5 in(114 mm) | 66% | 4.5 |
| MayMay | 73°F(23°C) | 49°F(10°C) | 4.8 in(123 mm) | 66% | 5.1 |
| JunJune | 82°F(28°C) | 59°F(15°C) | 5.0 in(126 mm) | 67% | 5.8 |
| JulJuly | 85°F(30°C) | 63°F(17°C) | 4.0 in(101 mm) | 69% | 5.8 |
| AugAugust | 83°F(28°C) | 62°F(17°C) | 4.2 in(106 mm) | 74% | 5.1 |
| SepSeptemberBest | 77°F(25°C) | 54°F(12°C) | 3.6 in(92 mm) | 70% | 4.4 |
| OctOctober | 64°F(18°C) | 42°F(6°C) | 3.0 in(76 mm) | 65% | 2.8 |
| NovNovember | 49°F(9°C) | 31°F(0°C) | 2.6 in(67 mm) | 71% | 1.7 |
| DecDecember | 36°F(2°C) | 21°F(-6°C) | 2.1 in(54 mm) | 76% | 1.3 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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