Quincy, Illinois Climate by Month
Quincy, Illinois, United States
Hot summers and cold winters, with rain spread through the year.
Hot summers and cold winters, with rain spread through the year: that's Quincy's climate in short. July is the warmest month, with highs around 88°F (31°C); January is the coolest at 36°F (2°C), and nights dip to 19°F (-7°C). About 39 in (994 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 88°F(31°C)
- Average high, July
- Coldest nights
- 19°F(-7°C)
- Average low, January
- Rain per year
- 39 in(994 mm)
- No clear rainy season
- Humidity
- 68%
- Sunniest: July
Best and worst months in Quincy
Best for weatherThe most comfortable weather comes in May, with highs around 76°F (24°C) and about 4.7 in (119 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 36°F (2°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 May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Quincy weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 36°F(2°C) | 19°F(-7°C) | 1.6 in(40 mm) | 78% | 1.7 |
| FebFebruary | 41°F(5°C) | 23°F(-5°C) | 1.7 in(42 mm) | 65% | 2.7 |
| MarMarch | 53°F(12°C) | 33°F(1°C) | 2.9 in(74 mm) | 64% | 3.8 |
| AprApril | 65°F(19°C) | 44°F(7°C) | 4.1 in(104 mm) | 62% | 4.6 |
| MayMayBest | 76°F(24°C) | 55°F(13°C) | 4.7 in(119 mm) | 66% | 5.3 |
| JunJune | 84°F(29°C) | 64°F(18°C) | 4.4 in(112 mm) | 67% | 6.0 |
| JulJuly | 88°F(31°C) | 67°F(20°C) | 4.4 in(112 mm) | 68% | 6.1 |
| AugAugust | 86°F(30°C) | 65°F(19°C) | 3.5 in(89 mm) | 69% | 5.4 |
| SepSeptember | 80°F(27°C) | 56°F(14°C) | 4.3 in(110 mm) | 64% | 4.7 |
| OctOctober | 67°F(20°C) | 45°F(7°C) | 2.8 in(72 mm) | 65% | 3.1 |
| NovNovember | 53°F(12°C) | 34°F(1°C) | 2.6 in(66 mm) | 63% | 2.0 |
| DecDecember | 41°F(5°C) | 24°F(-4°C) | 2.1 in(54 mm) | 80% | 1.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
Places with a similar climate outside the United States
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