Historical Weather in Naperville, IL
See 55+ years of weather history for any date in Naperville going back to 1970.
Part of Illinois weather history
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Today in Naperville Weather HistorySee records, averages, and 55+ years of data for today's date
→Monthly Climate Averages
Historical temperature and precipitation averages for Naperville, IL, based on 55+ years of weather data.
Warmest MonthJulyAvg High: 85°F / Low: 63°F
Coldest MonthJanuaryAvg High: 31°F / Low: 14°F
Jan
31°/ 14°
💧 4.7"
❄️ 1.5"
Feb
36°/ 18°
💧 5.4"
❄️ 1.7"
Mar
48°/ 28°
💧 6.8"
❄️ 1.5"
Apr
61°/ 38°
💧 8.2"
❄️ 2.0"
May
72°/ 48°
💧 9.4"
Jun
82°/ 58°
💧 10.0"
Jul
85°/ 63°
💧 11.3"
Aug
83°/ 61°
💧 11.5"
Sep
77°/ 54°
💧 10.0"
Oct
64°/ 42°
💧 8.8"
❄️ 1.1"
Nov
49°/ 31°
💧 7.8"
❄️ 1.3"
Dec
36°/ 20°
💧 6.1"
❄️ 1.6"
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
Naperville Temperature Records
- Record High: The hottest temperature ever recorded in Naperville, IL is 103°F, set on June 25, 1988.
- Record Low: The coldest temperature ever recorded in Naperville, IL is -29°F, set on January 31, 2019.
- Data Coverage: Based on 20 years of data from NOAA weather station: LISLE - MORTON ARBORETUM.
All-Time Record High
103°F
June 25, 1988
All-Time Record Low
-29°F
January 31, 2019
Monthly Temperature Records in Naperville
| Month | Record High | Record Low |
|---|---|---|
| January | 66°F(1989) | -29°F(2019) |
| February | 74°F(2024) | -24°F(2019) |
| March | 86°F(2012) | -13°F(2002) |
| April | 91°F(1986) | 8°F(1982) |
| May | 97°F(2012) | 22°F(2013) |
| June | 103°F(1988) | 32°F(1996) |
| July | 103°F(2012) | 42°F(1983) |
| August | 101°F(1991) | 42°F(2009) |
| September | 95°F(1983) | 28°F(1995) |
| October | 92°F(1971) | 15°F(1988) |
| November | 77°F(1974) | -2°F(1976) |
| December | 71°F(2012) | -22°F(1983) |
Naperville Snow RecordsSee the top 10 snowiest days ever recorded
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