Joliet, IL weather in October
October in Joliet: cool, with some rain. Highs 63°F, lows 43°F, about 10 wet days. A good month for most outdoor plans.
- Normal high
- 63°F
- Normal low
- 43°F
- Wet days
- 10
- 3.1 in total
- Muggy days
- 0
- dew point 65°F+
How October changes from start to finish
| October 1 | October 31 | |
|---|---|---|
| Normal high | 70°F | 56°F |
| Normal low | 49°F | 38°F |
| Chance of a wet day | 29% | 32% |
| Sunrise / sunset | 6:49 am / 6:34 pm | 7:22 am / 5:48 pm |
| Daylight | 11.8 h | 10.4 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical October day
- 6 am49°Fdew point 42°F
- 9 am54°Fdew point 43°F
- Noon60°Fdew point 42°F
- 3 pm61°Fdew point 42°F
- 6 pm57°Fdew point 42°F
- 9 pm54°Fdew point 43°F
NOAA hourly normals (local standard time) from Chicago Midway Airport (25 mi away); average wind 10 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F12 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below3 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per October, counted from daily records for each year 1991-2020.
Rain in October
Normal precipitation is 3.1 in; a dry October brings about 1.8 in and a wet one about 4.1 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more. Snow is very rare.
How October varies from year to year
- Warmest October, 1991-20202007: average high 70°F
- Coolest October2009: average high 56°F
- Wettest October1991: 8.4 in
- Driest October2005: 0.3 in
- Highest reading88°F (October 7, 2007)
- Lowest reading25°F (October 22, 2018)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
October compared with September and November
| September | October | November | |
|---|---|---|---|
| Normal high | 76°F | 63°F | 49°F |
| Normal low | 55°F | 43°F | 32°F |
| Wet days | 8 | 10 | 10 |
| Comfortable days | 14 | 12 | 3 |
| Daylight | 12.5 h | 11.1 h | 9.9 h |
Highs change by -13°F from September and -14°F into November.
Nearby alternatives in October
- Warmer: St. Louis, MO229 mi · high 69°F · 9 wet days
- Cooler: Green Bay, WI207 mi · high 58°F · 10 wet days
How Joliet ranks in October
- Normal high280th warmest of 378 cities; 4th of 8 in Illinois
- Wet days263rd driest of 378
- Comfortable days169th most of 340
What to pack for Joliet in October
- A rain jacket or umbrella – rain on about 10 days
Frost in October
The first fall frost typically comes around Oct 25; in 1 year in 10 it comes before Oct 12. All frost dates for Joliet.
Heating and cooling
October has 375 heating degree days and 13 cooling degree days (base 65°F), 6% of the year's total heating and cooling demand.
Questions
How cold is Joliet in October?
The normal high is 63°F and the normal low is 43°F. From 1991 to 2020 the coldest October reading was 25°F (most recently on October 22, 2018).
Does it rain a lot in Joliet in October?
About 10 days in October have at least 0.01 in of precipitation, and the normal total is 3.1 in. The wettest October in 1991-2020 was in 1991 (8.4 in); the driest was in 2005 (0.3 in).
Is October a good time to visit Joliet?
October ranks 5th of 12 months on our comfort score for Joliet (61 out of 100). It has about 12 comfortable days. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Joliet Brandon Rd Dam (USC00114530), 1.9 mi SW of the city center, 543 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Chicago Midway Airport (USW00014819), 25 mi NE of the city center, 612 ft (71 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Chicago Midway Intl Arpt (725340-14819), 25 mi NE of the city center, 610 ft (69 ft higher than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).