Joliet weather in October: Joliet, Illinois: normal highs, lows, rain and records for October
Joliet in October has a normal high of 63°F and a normal low of 43°F, a daily mean of 53°F, falling from 70°F on the 1st to 56°F by the 31st. Measurable precipitation falls on 10 days in a normal October, 3.14 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 17°C and low of 6°C, 80 mm of precipitation in October.
- NOAA stationJoliet Brandon Rd Dam
- Station IDUSC00114530
- Location41.50°N 88.10°W
- Elevation543 ft (166 m)
- Population151,837
- Jan 31° 17°
- Feb 35° 20°
- Mar 47° 29°
- Apr 60° 39°
- May 71° 49°
- Jun 80° 60°
- Jul 84° 64°
- Aug 82° 63°
- Sep 76° 55°
- Oct 63° 43°
- Nov 49° 32°
- Dec 36° 22°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Joliet in October?
The normal high is 63°F and the normal low 43°F, for a daily mean of 53.3°F. October is 12.4°F cooler than September and 12.9°F warmer than November. October is the 6th warmest month of the year in Joliet and the 7th wettest. Across the month the normal high falls 14°F, from 70°F on October 1 to 56°F on October 31. From one year to the next October's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 51°F and 56°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 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 70°F | 49°F | 29% | 16% |
| October 8 | 67°F | 46°F | 30% | 17% |
| October 15 | 64°F | 44°F | 31% | 17% |
| October 22 | 60°F | 41°F | 31% | 18% |
| October 31 | 56°F | 38°F | 32% | 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 | 70°F | 49°F | 29% | 16% | 11 h 50 min |
| October 2 | 70°F | 49°F | 29% | 16% | 11 h 50 min |
| October 3 | 70°F | 48°F | 29% | 16% | 11 h 40 min |
| October 4 | 69°F | 48°F | 29% | 17% | 11 h 40 min |
| October 5 | 69°F | 47°F | 29% | 17% | 11 h 40 min |
| October 6 | 68°F | 47°F | 30% | 17% | 11 h 30 min |
| October 7 | 68°F | 47°F | 30% | 17% | 11 h 30 min |
| October 8 | 67°F | 46°F | 30% | 17% | 11 h 30 min |
| October 9 | 67°F | 46°F | 30% | 17% | 11 h 30 min |
| October 10 | 66°F | 46°F | 30% | 17% | 11 h 20 min |
| October 11 | 66°F | 45°F | 30% | 17% | 11 h 20 min |
| October 12 | 65°F | 45°F | 30% | 17% | 11 h 20 min |
| October 13 | 65°F | 44°F | 31% | 17% | 11 h 20 min |
| October 14 | 64°F | 44°F | 31% | 17% | 11 h 10 min |
| October 15 | 64°F | 44°F | 31% | 17% | 11 h 10 min |
| October 16 | 63°F | 43°F | 31% | 17% | 11 h 10 min |
| October 17 | 63°F | 43°F | 31% | 17% | 11 h |
| October 18 | 62°F | 43°F | 31% | 17% | 11 h |
| October 19 | 62°F | 42°F | 31% | 17% | 11 h |
| October 20 | 61°F | 42°F | 31% | 17% | 11 h |
| October 21 | 61°F | 42°F | 31% | 17% | 10 h 50 min |
| October 22 | 60°F | 41°F | 31% | 18% | 10 h 50 min |
| October 23 | 60°F | 41°F | 31% | 18% | 10 h 50 min |
| October 24 | 59°F | 41°F | 32% | 18% | 10 h 50 min |
| October 25 | 59°F | 40°F | 32% | 18% | 10 h 40 min |
| October 26 | 58°F | 40°F | 32% | 18% | 10 h 40 min |
| October 27 | 58°F | 40°F | 32% | 18% | 10 h 40 min |
| October 28 | 58°F | 39°F | 32% | 18% | 10 h 40 min |
| October 29 | 57°F | 39°F | 32% | 18% | 10 h 30 min |
| October 30 | 57°F | 39°F | 32% | 18% | 10 h 30 min |
| October 31 | 56°F | 38°F | 32% | 18% | 10 h 30 min |
- Normal high
- 63°FOctober average
- Normal low
- 43°FOctober average
- Precipitation
- 3.14 inmonth total
- Days with precipitation
- 100.01 inch or more
- 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
- 10
- Days at 80°F or more
- 2
- Sunshine
- 71%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00114530; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Joliet in October?
On a given October day the chance of 0.01 inch or more is 31% on average, highest around October 31 (32%). In all, 3.14 in falls on 10 days of a normal October, 1 of them with an inch or more.
In a normal October in Joliet, 3 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00114530.
What are the records for October in Joliet?
The warmest October temperature on this station's record (since 1975) is 88°F, on October 5, 2005; the coldest is 17°F, on October 29, 1976. The wettest October brought 8.71 in (1954); the snowiest, 3.0 inches (1967).
The October mean against the 1991-2020 normal of 53.3°F: 2021 59.8°F (+6.5), 2022 52.3°F (−1.0), 2023 54.0°F (+0.7), 2024 57.8°F (+4.5), 2025 57.9°F (+4.6). 4 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 59.8°F | +6.5°F | 7.07 in |
| 2022 | 52.3°F | −1.0°F | 2.06 in |
| 2023 | 54.0°F | +0.7°F | 3.82 in |
| 2024 | 57.8°F | +4.5°F | 0.72 in |
| 2025 | 57.9°F | +4.6°F | 1.53 in |
Source: records: ACIS, station USC00114530; recent months: ACIS, station USC00114530. Records and recent months use complete months only.
How does October in Joliet 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; Joliet's is 63°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.