Elgin, Illinois Climate by Month
Elgin, Illinois, United States
Warm summers and freezing winters, with rain spread through the year.
Warm summers and freezing winters, with rain spread through the year: that's Elgin's climate in short. Expect highs of 85°F (29°C) in July and 31°F (0°C) in January, with the coldest nights (January) near 15°F (-9°C). About 38 in (963 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 85°F(29°C)
- Average high, July
- Coldest nights
- 15°F(-9°C)
- Average low, January
- Rain per year
- 38 in(963 mm)
- No clear rainy season
- Humidity
- 72%
- Sunniest: July
Best and worst months in Elgin
Best for weatherThe most comfortable weather comes in September, with highs around 76°F (25°C) and about 3.7 in (95 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 31°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)
Elgin weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 31°F(0°C) | 15°F(-9°C) | 1.8 in(46 mm) | 95% | 1.4 |
| FebFebruary | 36°F(2°C) | 18°F(-8°C) | 1.5 in(38 mm) | 80% | 2.5 |
| MarMarch | 48°F(9°C) | 29°F(-2°C) | 2.2 in(56 mm) | 64% | 3.6 |
| AprApril | 60°F(15°C) | 38°F(3°C) | 4.3 in(110 mm) | 60% | 4.5 |
| MayMay | 71°F(22°C) | 48°F(9°C) | 4.4 in(113 mm) | 68% | 5.1 |
| JunJune | 81°F(27°C) | 58°F(15°C) | 4.8 in(122 mm) | 69% | 5.8 |
| JulJuly | 85°F(29°C) | 63°F(17°C) | 3.8 in(96 mm) | 70% | 5.9 |
| AugAugust | 83°F(28°C) | 61°F(16°C) | 4.1 in(103 mm) | 75% | 5.1 |
| SepSeptemberBest | 76°F(25°C) | 53°F(12°C) | 3.7 in(95 mm) | 72% | 4.3 |
| OctOctober | 64°F(18°C) | 42°F(6°C) | 2.8 in(70 mm) | 66% | 2.7 |
| NovNovember | 48°F(9°C) | 31°F(0°C) | 2.5 in(64 mm) | 72% | 1.7 |
| DecDecember | 36°F(2°C) | 21°F(-6°C) | 2.0 in(50 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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