USA
Chicago in October: weather & travel advice
This month's data profile
Strong month under the current formula
Chicago in October is climatically well suited to city breaks. The average daily high is around 15 °C. With about 11 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
58/100 · #5
Warmth
#5
Dryness
#7
Sun
#8
Published best categories: Active
Chicago · OctoberPhoto: G B_NZ · CC BY-SA 2.0Climate facts
- Average high
- 15 °C
- Average low
- 10 °C
- Rainy days (est.)
- 11 rainy days (est.)
- Sun (est.)
- 3 h/day
- Humidity
- 76 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Score |
|---|---|---|---|---|---|---|---|---|
| September | 22 | 16 | 10 | 82 | 5.2 | 75 | 4.0 | 80 |
| October (selected) | 15 | 10 | 11 | 93 | 3.4 | 76 | 4.9 | 58 |
| November | 8 | 3 | 9 | 64 | 2.2 | 79 | 5.5 | 44 |
How do the previous and next months compare?
Baseline: October (58/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | |
|---|---|---|---|---|---|---|---|---|
| September | +22 | +6.3 °C | +6.5 °C | -0.4 | -10.2 mm | +1.8 h | -1.3 % | -0.9 m/s |
| November | -14 | -7.1 °C | -6.4 °C | -1.7 | -28.7 mm | -1.2 h | +3.3 % | +0.5 m/s |
All twelve months in context
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Frequently asked questions
How warm is Chicago in October?
The average daily high is around 15 °C, with an average daily low of about 10 °C.
Does it rain a lot in Chicago in October?
The curated estimate is about 11 rainy days per month, not a directly measured long-term average. Total precipitation averages around 93 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Chicago?
By the climate score, June, July, August and September are the strongest months for Chicago. October is not among them.