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Aurora, IL Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Aurora, IL?
Aurora, IL gets 39.5 in of precipitation a year over about 116 rainy days, and about 27.9 in of snow a season. July is the warmest month (average high 84°F) and January the coldest (average low 15°F).
Humid continental climate
Aurora, IL has hot summers and cold winters. Daytime highs range from about 31°F in January to 84°F in July. May is usually the wettest month, and snow falls in winter. The most comfortable time to visit is typically September to October, when daytime highs sit near 70°F.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 18° | 34° |
| Spring | Mar–May | 38° | 60° |
| Summer | Jun–Aug | 62° | 83° |
| Autumn | Sep–Nov | 42° | 63° |
How much rain does Aurora get?
Aurora gets 39.5 in of precipitation in an average year, spread over about 116 days with measurable rain. That is more rainy days than 74% of the US.
May is the wettest month, with 4.9 in. February is the driest, with 1.8 in. May has the most rainy days, about 13.
The longest dry spell in the last five years lasted 21 days, to June 10, 2023.
From September 2025 to August 2026 Aurora got 42.7 in of rain, against a normal of 39.5 in for those months. July 2026 had the most, with 8.3 in.
See where Aurora ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Illinois.
Does it snow in Aurora?
Yes. Aurora gets about 27.9 in of snow in an average season, measured at the reporting station.
The snowiest winter on record is 1978–79, with 83.7 in.
The most recent measurable snow at the station fell on March 18, 2026.
From September 2025 to August 2026 the station measured 34.1 in of snow, against a normal of 27.9 in for those months. January 2026 had the most, with 11.3 in.
See where Aurora ranks: snowiest cities in the US.
Aurora weather by month
Aurora weather in January
In January, Aurora averages a high of 31°F and a low of 15°F. It gets 1.9 in of precipitation over about 9 rainy days. Estimated sunshine is 24% of daylight hours, derived from ERA5 cloud cover. The January record high is 66°F (1989) and the record low is -26°F (1985).
Aurora weather in February
In February, Aurora averages a high of 35°F and a low of 18°F. It gets 1.8 in of precipitation over about 8 rainy days. Estimated sunshine is 43% of daylight hours, derived from ERA5 cloud cover. The February record high is 74°F (2024) and the record low is -24°F (2019).
Aurora weather in March
In March, Aurora averages a high of 48°F and a low of 28°F. It gets 2.4 in of precipitation over about 10 rainy days. Estimated sunshine is 34% of daylight hours, derived from ERA5 cloud cover. The March record high is 84°F (2012) and the record low is -8°F (2002).
Aurora weather in April
In April, Aurora averages a high of 60°F and a low of 38°F. It gets 4.0 in of precipitation over about 12 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The April record high is 91°F (1986) and the record low is 8°F (1982).
Aurora weather in May
In May, Aurora averages a high of 71°F and a low of 49°F. It gets 4.9 in of precipitation over about 13 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The May record high is 97°F (2012) and the record low is 26°F (1989).
Aurora weather in June
In June, Aurora averages a high of 81°F and a low of 59°F. It gets 4.5 in of precipitation over about 11 rainy days. Estimated sunshine is 50% of daylight hours, derived from ERA5 cloud cover. The June record high is 103°F (1988) and the record low is 32°F (1996).
Aurora weather in July
In July, Aurora averages a high of 84°F and a low of 64°F. It gets 4.2 in of precipitation over about 9 rainy days. Estimated sunshine is 47% of daylight hours, derived from ERA5 cloud cover. The July record high is 103°F (2012) and the record low is 42°F (1983).
Aurora weather in August
In August, Aurora averages a high of 82°F and a low of 62°F. It gets 3.9 in of precipitation over about 9 rainy days. Estimated sunshine is 51% of daylight hours, derived from ERA5 cloud cover. The August record high is 101°F (1991) and the record low is 43°F (1982).
Aurora weather in September
In September, Aurora averages a high of 76°F and a low of 54°F. It gets 3.4 in of precipitation over about 8 rainy days. Estimated sunshine is 53% of daylight hours, derived from ERA5 cloud cover. The September record high is 96°F (2026) and the record low is 28°F (1995). September is one of the most comfortable months to visit.
Aurora weather in October
In October, Aurora averages a high of 63°F and a low of 42°F. It gets 3.7 in of precipitation over about 9 rainy days. Estimated sunshine is 50% of daylight hours, derived from ERA5 cloud cover. The October record high is 90°F (1971) and the record low is 15°F (1988). October is one of the most comfortable months to visit.
Aurora weather in November
In November, Aurora averages a high of 48°F and a low of 31°F. It gets 2.7 in of precipitation over about 9 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The November record high is 77°F (1974) and the record low is -2°F (1976).
Aurora weather in December
In December, Aurora averages a high of 36°F and a low of 21°F. It gets 2.2 in of precipitation over about 9 rainy days. Estimated sunshine is 31% of daylight hours, derived from ERA5 cloud cover. The December record high is 70°F (2012) and the record low is -22°F (1983).
Sunshine, humidity and wind in Aurora
September is the sunniest month in Aurora, with estimated sunshine of 53% of daylight hours from ERA5 cloud cover. January is the cloudiest, at 24%. The annual cloud-cover estimate is 42% of daylight hours; it is not a measurement of sunshine duration. Aurora is cloudier than 81% of the US.
Humidity peaks in January at 78% and is lowest in June at 59%.
Aurora has about 16 days a year above 90°F. Aurora is cooler than 67% of the US.
Thunderstorms occur on about 12 days a year.
See where Aurora ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.
First and last freeze in Aurora
The first fall freeze in Aurora typically comes around October 14, and the last spring freeze around April 25. That leaves a frost-free growing season of about 172 days.
Aurora weather records
These records cover AURORA WATER during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Aurora station is 103°F, on June 25, 1988. The coldest is -26°F, on January 20, 1985.
The wettest day in the available station history brought 16.9 in of precipitation, on July 18, 1996.
45 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.4°F per decade since 1970.
The best time to visit Aurora
The most comfortable time to visit is typically September to October, when daytime highs sit near 70°F.
Winter (December–February) is cold, with average highs around 34°F and lows near 18°F. Snow is possible.
Spring (March–May) is mild, with average highs around 60°F and lows near 38°F.
Summer (June–August) is hot, with average highs around 83°F and lows near 62°F.
Autumn (September–November) is mild, with average highs around 63°F and lows near 42°F.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 15° | 31° | 1.9 in | 9 | 78% | 24% | 66° | -26° |
| February | 18° | 35° | 1.8 in | 8 | 67% | 43% | 74° | -24° |
| March | 28° | 48° | 2.4 in | 10 | 64% | 34% | 84° | -8° |
| April | 38° | 60° | 4.0 in | 12 | 60% | 38% | 91° | 8° |
| May | 49° | 71° | 4.9 in | 13 | 60% | 38% | 97° | 26° |
| June | 59° | 81° | 4.5 in | 11 | 59% | 50% | 103° | 32° |
| July | 64° | 84° | 4.2 in | 9 | 70% | 47% | 103° | 42° |
| August | 62° | 82° | 3.9 in | 9 | 71% | 51% | 101° | 43° |
| September | 54° | 76° | 3.4 in | 8 | 68% | 53% | 96° | 28° |
| October | 42° | 63° | 3.7 in | 9 | 65% | 50% | 90° | 15° |
| November | 31° | 48° | 2.7 in | 9 | 67% | 44% | 77° | -2° |
| December | 21° | 36° | 2.2 in | 9 | 73% | 31% | 70° | -22° |
Station: AURORA WATER, 2 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Aurora climate questions
How much rain does Aurora get?
Aurora gets 39.5 in of precipitation in an average year, over about 116 rainy days.
What is the wettest month in Aurora?
May is the wettest month in Aurora, with 4.9 in. February is the driest, with 1.8 in.
How many rainy days does Aurora have a year?
Aurora has about 116 days with measurable rain in an average year. May has the most, about 13.
Does it snow in Aurora?
Yes. Aurora gets about 27.9 in of snow in an average season. The snowiest winter on record is 1978–79, with 83.7 in.
What is the hottest month in Aurora?
July is the warmest month in Aurora, with an average high of 84°F.
What is the coldest month in Aurora?
January is the coldest month in Aurora, with an average low of 15°F.
What is the record high temperature in Aurora?
Within the available 1970–2026 station history, the record high at the Aurora station is 103°F, set on June 25, 1988. The record low is -26°F, on January 20, 1985.
What is the sunniest month in Aurora?
September is the sunniest month in Aurora, with estimated sunshine of 53% of daylight hours from ERA5 cloud cover. January is the cloudiest.
When is the first frost in Aurora?
The first fall freeze in Aurora typically comes around October 14. The last spring freeze is around April 25.
What is the best time to visit Aurora?
The most comfortable time to visit is typically September to October, when daytime highs sit near 70°F.