Buffalo Grove Climate by Month
Buffalo Grove, Illinois, United States
Warm summers and freezing winters, with rain spread through the year.
Buffalo Grove has warm summers and freezing winters, with rain spread through the year. Afternoon highs range from 32°F (0°C) in January to 84°F (29°C) in July, and January nights average 16°F (-9°C). It gets 37 in (938 mm) of rain a year, spread across the months.
- Warmest month
- 84°F(29°C)
- Average high, July
- Coldest nights
- 16°F(-9°C)
- Average low, January
- Rain per year
- 37 in(938 mm)
- No clear rainy season
- Humidity
- 72%
- Sunniest: July
Best and worst months in Buffalo Grove
Best for weatherThe most comfortable weather comes in September, with highs around 75°F (24°C) and about 3.4 in (86 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 32°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)
Buffalo Grove weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 32°F(0°C) | 16°F(-9°C) | 1.9 in(48 mm) | 92% | 1.4 |
| FebFebruary | 36°F(2°C) | 19°F(-7°C) | 1.6 in(41 mm) | 79% | 2.4 |
| MarMarch | 47°F(8°C) | 29°F(-2°C) | 2.2 in(57 mm) | 65% | 3.6 |
| AprApril | 59°F(15°C) | 38°F(3°C) | 4.1 in(105 mm) | 60% | 4.5 |
| MayMay | 71°F(21°C) | 48°F(9°C) | 4.3 in(109 mm) | 64% | 5.1 |
| JunJune | 80°F(26°C) | 58°F(14°C) | 4.3 in(108 mm) | 71% | 5.8 |
| JulJuly | 84°F(29°C) | 63°F(17°C) | 3.5 in(90 mm) | 72% | 5.9 |
| AugAugust | 82°F(28°C) | 62°F(17°C) | 4.3 in(109 mm) | 75% | 5.1 |
| SepSeptemberBest | 75°F(24°C) | 54°F(12°C) | 3.4 in(86 mm) | 72% | 4.3 |
| OctOctober | 63°F(17°C) | 42°F(6°C) | 2.8 in(70 mm) | 66% | 2.7 |
| NovNovember | 48°F(9°C) | 31°F(0°C) | 2.4 in(62 mm) | 72% | 1.7 |
| DecDecember | 36°F(2°C) | 21°F(-6°C) | 2.1 in(53 mm) | 75% | 1.3 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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