Rockford Climate by Month
Rockford, 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 Rockford's climate in short. Expect highs of 84°F (29°C) in July and 29°F (-1°C) in January, with the coldest nights (January) near 13°F (-10°C). It gets 37 in (941 mm) of rain a year, spread across the months.
- Warmest month
- 84°F(29°C)
- Average high, July
- Coldest nights
- 13°F(-10°C)
- Average low, January
- Rain per year
- 37 in(941 mm)
- No clear rainy season
- Humidity
- 72%
- Sunniest: July
Best and worst months in Rockford
Best for weatherSeptember is the best time for weather in Rockford: highs near 76°F (24°C) and about 4.1 in (104 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 29°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 September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Rockford weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 29°F(-1°C) | 13°F(-10°C) | 1.5 in(37 mm) | 77% | 1.5 |
| FebFebruary | 34°F(1°C) | 17°F(-8°C) | 1.4 in(35 mm) | 86% | 2.5 |
| MarMarch | 46°F(8°C) | 27°F(-3°C) | 2.2 in(57 mm) | 67% | 3.7 |
| AprApril | 60°F(15°C) | 37°F(3°C) | 3.9 in(100 mm) | 60% | 4.5 |
| MayMay | 72°F(22°C) | 49°F(9°C) | 4.2 in(106 mm) | 68% | 5.2 |
| JunJune | 81°F(27°C) | 58°F(15°C) | 4.9 in(124 mm) | 69% | 5.8 |
| JulJuly | 84°F(29°C) | 63°F(17°C) | 3.9 in(98 mm) | 71% | 5.9 |
| AugAugust | 82°F(28°C) | 61°F(16°C) | 3.8 in(97 mm) | 73% | 5.2 |
| SepSeptemberBest | 76°F(24°C) | 53°F(11°C) | 4.1 in(104 mm) | 68% | 4.3 |
| OctOctober | 63°F(17°C) | 41°F(5°C) | 2.8 in(72 mm) | 68% | 2.7 |
| NovNovember | 47°F(8°C) | 30°F(-1°C) | 2.4 in(60 mm) | 76% | 1.7 |
| DecDecember | 34°F(1°C) | 19°F(-7°C) | 2.0 in(51 mm) | 82% | 1.3 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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