Pekin Climate by Month
Pekin, Illinois, United States
Hot summers and freezing winters, with rain spread through the year.
The climate in Pekin is one of hot summers and freezing winters, with rain spread through the year. July is the warmest month, with highs around 87°F (30°C); January is the coolest at 35°F (1°C), and nights dip to 18°F (-8°C). It gets 37 in (940 mm) of rain a year, spread across the months.
- Warmest month
- 87°F(30°C)
- Average high, July
- Coldest nights
- 18°F(-8°C)
- Average low, January
- Rain per year
- 37 in(940 mm)
- No clear rainy season
- Humidity
- 69%
- Sunniest: July
Best and worst months in Pekin
Best for weatherThe most comfortable weather comes in May and September, with highs around 77°F (25°C) and about 3.8 in (97 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 35°F (1°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)
Pekin weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 35°F(1°C) | 18°F(-8°C) | 1.7 in(44 mm) | 83% | 1.6 |
| FebFebruary | 40°F(4°C) | 22°F(-5°C) | 1.7 in(42 mm) | 68% | 2.7 |
| MarMarch | 52°F(11°C) | 32°F(0°C) | 2.7 in(68 mm) | 66% | 3.8 |
| AprApril | 64°F(18°C) | 42°F(5°C) | 4.1 in(104 mm) | 58% | 4.6 |
| MayMayBest | 75°F(24°C) | 53°F(11°C) | 4.3 in(110 mm) | 64% | 5.3 |
| JunJune | 84°F(29°C) | 62°F(17°C) | 4.6 in(118 mm) | 69% | 6.0 |
| JulJuly | 87°F(30°C) | 65°F(19°C) | 4.1 in(104 mm) | 72% | 6.1 |
| AugAugust | 85°F(30°C) | 64°F(18°C) | 2.8 in(72 mm) | 72% | 5.4 |
| SepSeptemberBest | 80°F(27°C) | 56°F(13°C) | 3.3 in(84 mm) | 65% | 4.6 |
| OctOctober | 67°F(20°C) | 44°F(7°C) | 2.9 in(73 mm) | 66% | 3.0 |
| NovNovember | 52°F(11°C) | 33°F(1°C) | 2.5 in(63 mm) | 65% | 1.9 |
| DecDecember | 39°F(4°C) | 24°F(-5°C) | 2.3 in(58 mm) | 84% | 1.4 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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