Springfield, Illinois Climate by Month
Springfield, Illinois, United States
Hot summers and cold winters, with rain spread through the year.
The climate in Springfield is one of hot summers and cold winters, with rain spread through the year. July is the warmest month, with highs around 88°F (31°C); January is the coolest at 37°F (3°C), and nights dip to 20°F (-7°C). About 37 in (946 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 88°F(31°C)
- Average high, July
- Coldest nights
- 20°F(-7°C)
- Average low, January
- Rain per year
- 37 in(946 mm)
- No clear rainy season
- Humidity
- 69%
- Sunniest: July
Best and worst months in Springfield
Best for weatherMay, September and October are the best time for weather in Springfield: highs near 75°F (24°C) and about 3.5 in (89 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 37°F (3°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)
Springfield weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 37°F(3°C) | 20°F(-7°C) | 1.8 in(46 mm) | 76% | 1.6 |
| FebFebruary | 42°F(5°C) | 23°F(-5°C) | 1.8 in(45 mm) | 81% | 2.7 |
| MarMarch | 54°F(12°C) | 34°F(1°C) | 2.8 in(71 mm) | 62% | 3.8 |
| AprApril | 66°F(19°C) | 43°F(6°C) | 4.0 in(101 mm) | 62% | 4.6 |
| MayMayBest | 76°F(25°C) | 54°F(12°C) | 4.6 in(116 mm) | 66% | 5.3 |
| JunJune | 85°F(30°C) | 63°F(17°C) | 4.5 in(115 mm) | 66% | 6.0 |
| JulJuly | 88°F(31°C) | 67°F(19°C) | 3.6 in(91 mm) | 69% | 6.0 |
| AugAugust | 87°F(31°C) | 65°F(18°C) | 3.1 in(79 mm) | 69% | 5.4 |
| SepSeptemberBest | 81°F(27°C) | 56°F(13°C) | 3.2 in(81 mm) | 63% | 4.6 |
| OctOctoberBest | 68°F(20°C) | 45°F(7°C) | 2.8 in(70 mm) | 64% | 3.1 |
| NovNovember | 53°F(12°C) | 34°F(1°C) | 2.7 in(69 mm) | 72% | 2.0 |
| DecDecember | 41°F(5°C) | 25°F(-4°C) | 2.4 in(62 mm) | 78% | 1.5 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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