Elgin, IL weather in August
August in Elgin: warm and often humid, with frequent rain. Highs 82°F, lows 61°F, about 10 wet days. This is the peak of the warm season in Elgin.
- Normal high
- 82°F
- Normal low
- 61°F
- Wet days
- 10
- 4.3 in total
- Muggy days
- 10
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 84°F | 80°F |
| Normal low | 63°F | 59°F |
| Chance of a wet day | 33% | 31% |
| Sunrise / sunset | 5:46 am / 8:12 pm | 6:17 am / 7:29 pm |
| Daylight | 14.4 h | 13.2 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 August day
- 6 am64°Fdew point 61°F
- 9 am74°Fdew point 63°F
- Noon78°Fdew point 62°F
- 3 pm80°Fdew point 62°F
- 6 pm76°Fdew point 62°F
- 9 pm69°Fdew point 62°F
NOAA hourly normals (local standard time) from West Chicago Dupage Airport (9 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F7 of 31
- Hot dayshigh 90°F or more3 of 31
- Muggy daysdaily mean dew point 65°F or more10 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 below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 4.3 in; a dry August brings about 2.8 in and a wet one about 5.0 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20201995: average high 86°F
- Coolest August1992: average high 76°F
- Wettest August2007: 15.7 in
- Driest August2020: 0.7 in
- Highest reading98°F (August 8, 2001)
- Lowest reading44°F (August 31, 2009)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 84°F | 82°F | 76°F |
| Normal low | 63°F | 61°F | 53°F |
| Wet days | 9 | 10 | 9 |
| Comfortable days | 5 | 7 | 14 |
| Daylight | 14.9 h | 13.8 h | 12.5 h |
Highs change by -2°F from July and -6°F into September.
Nearby alternatives in August
- Drier: Carmel, IN182 mi · high 82°F · 7 wet days
- Cooler: Sister Bay, WI225 mi · high 75°F · 9 wet days
How Elgin ranks in August
- Normal high265th warmest of 378 cities; 5th of 8 in Illinois
- Wet days262nd driest of 378
- Comfortable days106th most of 341
What to pack for Elgin in August
- A rain jacket or umbrella – rain on about 10 days
Heating and cooling
August has 10 heating degree days and 219 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Elgin in August?
The normal high is 82°F and the normal low is 61°F. From 1991 to 2020 the hottest August reading was 98°F (August 8, 2001).
Does it rain a lot in Elgin in August?
About 10 days in August have at least 0.01 in of precipitation, and the normal total is 4.3 in. The wettest August in 1991-2020 was in 2007 (15.7 in); the driest was in 2020 (0.7 in).
Is August a good time to visit Elgin?
August ranks 5th of 12 months on our comfort score for Elgin (59 out of 100). It has about 7 comfortable days and about 3 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).