Galesburg Climate by Month
Galesburg, Illinois, United States
Warm summers and freezing winters, with rain spread through the year.
The climate in Galesburg is one of warm summers and freezing winters, with rain spread through the year. Afternoon highs range from 32°F (0°C) in January to 86°F (30°C) in July, and January nights average 16°F (-9°C). It gets 38 in (964 mm) of rain a year, spread across the months.
- Warmest month
- 86°F(30°C)
- Average high, July
- Coldest nights
- 16°F(-9°C)
- Average low, January
- Rain per year
- 38 in(964 mm)
- No clear rainy season
- Humidity
- 71%
- Sunniest: July
Best and worst months in Galesburg
Best for weatherMay and September are the best time for weather in Galesburg: highs near 76°F (24°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 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)
Galesburg weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 32°F(0°C) | 16°F(-9°C) | 1.6 in(41 mm) | 91% | 1.5 |
| FebFebruary | 37°F(3°C) | 20°F(-7°C) | 1.6 in(41 mm) | 76% | 2.6 |
| MarMarch | 50°F(10°C) | 30°F(-1°C) | 2.7 in(69 mm) | 71% | 3.8 |
| AprApril | 63°F(17°C) | 41°F(5°C) | 4.3 in(109 mm) | 61% | 4.5 |
| MayMayBest | 74°F(23°C) | 52°F(11°C) | 4.2 in(106 mm) | 66% | 5.3 |
| JunJune | 83°F(28°C) | 61°F(16°C) | 5.3 in(134 mm) | 67% | 6.0 |
| JulJuly | 86°F(30°C) | 65°F(18°C) | 4.3 in(110 mm) | 70% | 6.1 |
| AugAugust | 84°F(29°C) | 63°F(17°C) | 3.3 in(84 mm) | 71% | 5.4 |
| SepSeptemberBest | 78°F(26°C) | 55°F(13°C) | 3.5 in(88 mm) | 68% | 4.6 |
| OctOctober | 65°F(18°C) | 43°F(6°C) | 2.8 in(71 mm) | 63% | 2.9 |
| NovNovember | 49°F(10°C) | 31°F(0°C) | 2.4 in(60 mm) | 71% | 1.9 |
| DecDecember | 37°F(3°C) | 21°F(-6°C) | 2.0 in(51 mm) | 74% | 1.4 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
Places with a similar climate
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