Hot-summer humid continental climate
Climate Romeoville - Illinois
Annual high59ºF
Annual low41ºF
Precipitation40.07 inch
| Month | HighºF | LowºF | Precipinch | Snowinch |
|---|---|---|---|---|
| Jan | 31 | 16 | 1.93 | 11 |
| Feb | 35 | 20 | 1.78 | 6 |
| Mar | 48 | 29 | 2.77 | 4 |
| Apr | 61 | 40 | 3.96 | 1 |
| May | 71 | 50 | 4.26 | 0 |
| Jun | 80 | 60 | 4.34 | 0 |
| Jul | 84 | 64 | 4.71 | 0 |
| Aug | 82 | 63 | 4.07 | 0 |
| Sep | 76 | 55 | 3.13 | 0 |
| Oct | 63 | 43 | 3.41 | 0 |
| Nov | 49 | 33 | 3.46 | 1 |
| Dec | 35 | 20 | 2.25 | 9 |
- JanHigh 31ºFLow 16ºFPrecip 1.93 inch
- FebHigh 35ºFLow 20ºFPrecip 1.78 inch
- MarHigh 48ºFLow 29ºFPrecip 2.77 inch
- AprHigh 61ºFLow 40ºFPrecip 3.96 inch
- MayHigh 71ºFLow 50ºFPrecip 4.26 inch
- JunHigh 80ºFLow 60ºFPrecip 4.34 inch
- JulHigh 84ºFLow 64ºFPrecip 4.71 inch
- AugHigh 82ºFLow 63ºFPrecip 4.07 inch
- SepHigh 76ºFLow 55ºFPrecip 3.13 inch
- OctHigh 63ºFLow 43ºFPrecip 3.41 inch
- NovHigh 49ºFLow 33ºFPrecip 3.46 inch
- DecHigh 35ºFLow 20ºFPrecip 2.25 inch
Climate summary
What is the average weather in Romeoville, Illinois?
Romeoville experiences a humid continental climate, marked by very strong seasonal contrasts. Summers are warm and fairly wet, with July being the wettest month. Winters are cold and snowy, bringing significant snowfall, though precipitation is spread relatively evenly throughout the year.
Romeoville weather averages
Annual high59ºF
Annual low41ºF
Precipitation40.07 inch
Snowfall32 inch
Daily normals Romeoville - Illinois - January
| Day | HighºF | LowºF | Prec/ | Prec/ | Snow/ | Snow/ |
|---|---|---|---|---|---|---|
| Jan 1 | 32.8 | 18.0 | 0.08 | 0.08 | 0.30 | 0.30 |
| Jan 2 | 32.6 | 17.8 | 0.16 | 0.16 | 0.60 | 0.60 |
| Jan 3 | 32.5 | 17.6 | 0.24 | 0.24 | 0.90 | 0.90 |
| Jan 4 | 32.3 | 17.4 | 0.32 | 0.32 | 1.20 | 1.20 |
| Jan 5 | 32.2 | 17.2 | 0.39 | 0.39 | 1.50 | 1.50 |
| Jan 6 | 32.1 | 17.0 | 0.47 | 0.47 | 1.80 | 1.80 |
| Jan 7 | 31.9 | 16.8 | 0.55 | 0.55 | 2.10 | 2.10 |
| Jan 8 | 31.8 | 16.6 | 0.63 | 0.63 | 2.40 | 2.40 |
| Jan 9 | 31.7 | 16.5 | 0.70 | 0.70 | 2.80 | 2.80 |
| Jan 10 | 31.6 | 16.3 | 0.78 | 0.78 | 3.10 | 3.10 |
| Jan 11 | 31.5 | 16.2 | 0.86 | 0.86 | 3.40 | 3.40 |
| Jan 12 | 31.5 | 16.0 | 0.93 | 0.93 | 3.70 | 3.70 |
| Jan 13 | 31.4 | 15.9 | 1.00 | 1.00 | 4.10 | 4.10 |
| Jan 14 | 31.3 | 15.8 | 1.07 | 1.07 | 4.40 | 4.40 |
| Jan 15 | 31.3 | 15.7 | 1.14 | 1.14 | 4.70 | 4.70 |
| Jan 16 | 31.3 | 15.6 | 1.21 | 1.21 | 5.10 | 5.10 |
| Jan 17 | 31.2 | 15.5 | 1.28 | 1.28 | 5.40 | 5.40 |
| Jan 18 | 31.2 | 15.5 | 1.35 | 1.35 | 5.80 | 5.80 |
| Jan 19 | 31.2 | 15.4 | 1.42 | 1.42 | 6.10 | 6.10 |
| Jan 20 | 31.2 | 15.4 | 1.49 | 1.49 | 6.50 | 6.50 |
| Jan 21 | 31.3 | 15.4 | 1.55 | 1.55 | 6.90 | 6.90 |
| Jan 22 | 31.3 | 15.3 | 1.62 | 1.62 | 7.20 | 7.20 |
| Jan 23 | 31.3 | 15.4 | 1.69 | 1.69 | 7.60 | 7.60 |
| Jan 24 | 31.4 | 15.4 | 1.75 | 1.75 | 8.00 | 8.00 |
| Jan 25 | 31.5 | 15.4 | 1.82 | 1.82 | 8.30 | 8.30 |
| Jan 26 | 31.6 | 15.5 | 1.88 | 1.88 | 8.70 | 8.70 |
| Jan 27 | 31.7 | 15.5 | 1.94 | 1.94 | 9.10 | 9.10 |
| Jan 28 | 31.8 | 15.6 | 2.00 | 2.00 | 9.50 | 9.50 |
| Jan 29 | 31.9 | 15.7 | 2.06 | 2.06 | 9.80 | 9.80 |
| Jan 30 | 32.0 | 15.8 | 2.13 | 2.13 | 10.20 | 10.20 |
| Jan 31 | 32.2 | 16.0 | 2.19 | 2.19 | 10.60 | 10.60 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Romeoville - November 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Nov 1 | 62.1 | 51.1 | 0.22 |
| Nov 2 | – | – | – |
| Nov 3 | – | – | – |
| Nov 4 | – | – | – |
| Nov 5 | – | – | – |
| Nov 6 | – | – | – |
| Nov 7 | – | – | – |
| Nov 8 | – | – | – |
| Nov 9 | – | – | – |
| Nov 10 | – | – | – |
| Nov 11 | – | – | – |
| Nov 12 | – | – | – |
| Nov 13 | – | – | – |
| Nov 14 | – | – | – |
| Nov 15 | – | – | – |
| Nov 16 | – | – | – |
| Nov 17 | – | – | – |
| Nov 18 | – | – | – |
| Nov 19 | – | – | – |
| Nov 20 | – | – | – |
| Nov 21 | – | – | – |
| Nov 22 | – | – | – |
| Nov 23 | – | – | – |
| Nov 24 | – | – | – |
| Nov 25 | – | – | – |
| Nov 26 | – | – | – |
| Nov 27 | – | – | – |
| Nov 28 | – | – | – |
| Nov 29 | – | – | – |
| Nov 30 | – | – | – |
The data for November 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature62.1ºF · Nov 1
- Lowest max temperature62.1ºF · Nov 1
- Highest min temperature51.1ºF · Nov 1
- Lowest min temperature51.1ºF · Nov 1
Geo Romeoville - Illinois
Location
- Country
- United States
- State
- Illinois
- County
- –
- City
- Romeoville
- Zip Code
- 60446
- Elevation
- 620 ft
- Longitude
- -88.09
- Latitude
- 41.65
- ICAO
- –
- IATA
- –