Elgin, IL weather in September
Expect mild weather with some rain in Elgin in September, with highs near 76°F and lows near 53°F. Rain falls on about 9 days. Good for outdoor plans.
- Normal high
- 76°F
- Normal low
- 53°F
- Wet days
- 9
- 3.5 in total
- Muggy days
- 3
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 80°F | 70°F |
| Normal low | 58°F | 47°F |
| Chance of a wet day | 31% | 32% |
| Sunrise / sunset | 6:18 am / 7:27 pm | 6:49 am / 6:37 pm |
| Daylight | 13.1 h | 11.8 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 September day
- 6 am57°Fdew point 53°F
- 9 am66°Fdew point 56°F
- Noon72°Fdew point 55°F
- 3 pm74°Fdew point 54°F
- 6 pm68°Fdew point 55°F
- 9 pm62°Fdew point 55°F
NOAA hourly normals (local standard time) from West Chicago Dupage Airport (9 mi away); average wind 8 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F14 of 30
- Hot dayshigh 90°F or more2 of 30
- Muggy daysdaily mean dew point 65°F or more3 of 30
- Wet daysat least 0.01 in of rain or melted snow9 of 30
- Notable rainat least 0.10 in6 of 30
- Freezing nightslow 32°F or below0 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 3.5 in; a dry September brings about 2.0 in and a wet one about 4.2 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202005: average high 81°F
- Coolest September1993: average high 68°F
- Wettest September2008: 11.5 in
- Driest September2017: 0.6 in
- Highest reading95°F (September 5, 2012)
- Lowest reading29°F (September 24, 1995)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 82°F | 76°F | 63°F |
| Normal low | 61°F | 53°F | 41°F |
| Wet days | 10 | 9 | 11 |
| Comfortable days | 7 | 14 | 11 |
| Daylight | 13.8 h | 12.5 h | 11.1 h |
Highs change by -6°F from August and -13°F into October.
Nearby alternatives in September
- Cooler: Sister Bay, WI225 mi · high 68°F · 10 wet days
How Elgin ranks in September
- Normal high264th warmest of 378 cities; 7th of 8 in Illinois
- Wet days256th driest of 378
- Comfortable days110th most of 342
What to pack for Elgin in September
- A rain jacket or umbrella – rain on about 9 days
Heating and cooling
September has 109 heating degree days and 86 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Elgin in September?
The normal high is 76°F and the normal low is 53°F. From 1991 to 2020 the hottest September reading was 95°F (September 5, 2012).
Does it rain a lot in Elgin in September?
About 9 days in September have at least 0.01 in of precipitation, and the normal total is 3.5 in. The wettest September in 1991-2020 was in 2008 (11.5 in); the driest was in 2017 (0.6 in).
Is September a good time to visit Elgin?
September ranks 3rd of 12 months on our comfort score for Elgin (66 out of 100). It has about 14 comfortable days and about 2 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Elgin (USC00112736), 1.8 mi N of the city center, 763 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: West Chicago Dupage Airport (USW00094892), 8.7 mi SSE of the city center, 754 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Chicago O'hare International Airport (725300-94846), 19 mi ESE of the city center, 672 ft (68 ft lower than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).