Peoria weather in October: Peoria, Illinois: normal highs, lows, rain and records for October
Peoria in October has a normal high of 65°F and a normal low of 44°F, a daily mean of 55°F, falling from 72°F on the 1st to 58°F by the 31st. Measurable precipitation falls on 10 days in a normal October, 3.17 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 19°C and low of 7°C, 81 mm of precipitation and 0 cm of snow in October.
- NOAA stationGeneral Wayne A. Downing International Airport
- Station IDUSW00014842
- Location40.67°N 89.68°W
- Elevation650 ft (198 m)
- From the center7 miles
- Population111,696
- Jan 34° 18°
- Feb 39° 21°
- Mar 51° 32°
- Apr 64° 42°
- May 74° 53°
- Jun 83° 62°
- Jul 86° 66°
- Aug 85° 64°
- Sep 78° 56°
- Oct 65° 44°
- Nov 51° 33°
- Dec 39° 23°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Peoria in October?
The normal high is 65°F and the normal low 44°F, for a daily mean of 54.9°F. October is 12.5°F cooler than September and 13.0°F warmer than November. October is the 6th warmest month of the year in Peoria and the 7th wettest. Across the month the normal high falls 14°F, from 72°F on October 1 to 58°F on October 31. From one year to the next October's mean temperature typically moves about 2.5°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 52°F and 57°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 31%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 72°F | 50°F | 28% | 17% |
| October 8 | 69°F | 47°F | 29% | 18% |
| October 15 | 66°F | 45°F | 30% | 19% |
| October 22 | 63°F | 42°F | 30% | 19% |
| October 31 | 58°F | 39°F | 31% | 18% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 72°F | 50°F | 28% | 17% | 11 h 50 min |
| October 2 | 72°F | 50°F | 28% | 17% | 11 h 50 min |
| October 3 | 72°F | 49°F | 28% | 17% | 11 h 40 min |
| October 4 | 71°F | 49°F | 28% | 18% | 11 h 40 min |
| October 5 | 71°F | 49°F | 28% | 18% | 11 h 40 min |
| October 6 | 70°F | 48°F | 28% | 18% | 11 h 40 min |
| October 7 | 70°F | 48°F | 29% | 18% | 11 h 30 min |
| October 8 | 69°F | 47°F | 29% | 18% | 11 h 30 min |
| October 9 | 69°F | 47°F | 29% | 18% | 11 h 30 min |
| October 10 | 68°F | 47°F | 29% | 18% | 11 h 30 min |
| October 11 | 68°F | 46°F | 29% | 18% | 11 h 20 min |
| October 12 | 67°F | 46°F | 29% | 18% | 11 h 20 min |
| October 13 | 67°F | 46°F | 30% | 18% | 11 h 20 min |
| October 14 | 66°F | 45°F | 30% | 19% | 11 h 10 min |
| October 15 | 66°F | 45°F | 30% | 19% | 11 h 10 min |
| October 16 | 65°F | 44°F | 30% | 19% | 11 h 10 min |
| October 17 | 65°F | 44°F | 30% | 19% | 11 h 10 min |
| October 18 | 65°F | 44°F | 30% | 19% | 11 h |
| October 19 | 64°F | 43°F | 30% | 19% | 11 h |
| October 20 | 64°F | 43°F | 30% | 19% | 11 h |
| October 21 | 63°F | 43°F | 30% | 19% | 11 h |
| October 22 | 63°F | 42°F | 30% | 19% | 10 h 50 min |
| October 23 | 62°F | 42°F | 30% | 19% | 10 h 50 min |
| October 24 | 62°F | 42°F | 30% | 19% | 10 h 50 min |
| October 25 | 61°F | 41°F | 30% | 19% | 10 h 50 min |
| October 26 | 61°F | 41°F | 30% | 19% | 10 h 40 min |
| October 27 | 60°F | 40°F | 30% | 19% | 10 h 40 min |
| October 28 | 60°F | 40°F | 31% | 19% | 10 h 40 min |
| October 29 | 59°F | 40°F | 31% | 19% | 10 h 40 min |
| October 30 | 59°F | 39°F | 31% | 19% | 10 h 30 min |
| October 31 | 58°F | 39°F | 31% | 18% | 10 h 30 min |
- Normal high
- 65°FOctober average
- Normal low
- 44°FOctober average
- Precipitation
- 3.17 inmonth total
- Days with precipitation
- 100.01 inch or more
- Snowfall
- 0.1 inmonth total
- Nights at 32°F or colder
- 3
- Daylight
- 11 h 50 min to 10 h 30 minOctober 1 to October 31
- Days at 70°F or more
- 11
- Days at 80°F or more
- 3
- Sunshine
- 73%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014842; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Peoria in October?
On a given October day the chance of 0.01 inch or more is 30% on average, highest around October 28 (31%). In all, 3.17 in falls on 10 days of a normal October, 1 of them with an inch or more.
In a normal October in Peoria, 3 nights fall to freezing and snowfall averages 0.1 inches.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014842.
How humid and windy is Peoria in October?
At 3 p.m. the normal temperature is 55°F with 53% relative humidity and a dew point of 38°F; at 6 a.m. it is 42°F with 81% humidity. The wind averages 8.5 mph, most often from the southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 42°F | 37°F | 81% | 7.1 mph | 53% |
| 9 a.m. | 47°F | 38°F | 72% | 9.6 mph | 50% |
| noon | 53°F | 39°F | 58% | 11.0 mph | 50% |
| 3 p.m. | 55°F | 38°F | 53% | 11.0 mph | 49% |
| 6 p.m. | 50°F | 38°F | 63% | 7.5 mph | 51% |
| 9 p.m. | 47°F | 38°F | 70% | 7.5 mph | 52% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014842. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for October in Peoria?
The warmest October temperature on Peoria's official record (since 1883) is 93°F, on October 3, 2006; the coldest is 7°F, on October 30, 1925. The wettest October brought 10.53 in (1941); the snowiest, 4.2 inches (2019).
The October mean against the 1991-2020 normal of 54.9°F: 2021 60.3°F (+5.4), 2022 54.1°F (−0.8), 2023 57.0°F (+2.1), 2024 59.9°F (+5.0), 2025 59.8°F (+4.9). 4 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 60.3°F | +5.4°F | 9.68 in |
| 2022 | 54.1°F | −0.8°F | 2.67 in |
| 2023 | 57.0°F | +2.1°F | 3.23 in |
| 2024 | 59.9°F | +5.0°F | 0.98 in |
| 2025 | 59.8°F | +4.9°F | 1.96 in |
Source: records: ACIS, NWS threaded record PIAthr; recent months: ACIS, station USW00014842. Records and recent months use complete months only.
How does October in Peoria compare across Illinois?
Across the 144 places PlainClimate covers in Illinois, October normal highs run from 60°F in Barrington to 73°F in Anna; Peoria's is 65°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.