Climate Romeoville - Illinois
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 31 | 35 | 48 | 61 | 71 | 80 |
| Average low in ºF Av. low Lo | 16 | 20 | 29 | 40 | 50 | 60 |
| Av. precipitation in inch Av. precip. Pre. | 1.93 | 1.78 | 2.77 | 3.96 | 4.26 | 4.34 |
| Av. snowfall in inch Snowfall Sn | 11 | 6 | 4 | 1 | 0 | 0 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 84 | 82 | 76 | 63 | 49 | 35 |
| Average low in ºF Av. low Lo | 64 | 63 | 55 | 43 | 33 | 20 |
| Av. precipitation in inch Av. precip. Pre. | 4.71 | 4.07 | 3.13 | 3.41 | 3.46 | 2.25 |
| Av. snowfall in inch Snowfall Sn | 0 | 0 | 0 | 0 | 1 | 9 |
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 Climate Graph - Illinois Climate Chart
Daily normals Romeoville - Illinois - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 31.0 | 16.4 | 0.08 | 0.08 | 0.31 | 0.80 |
| 2 Jan | 30.9 | 16.3 | 0.16 | 0.16 | 0.71 | 1.80 |
| 3 Jan | 30.8 | 16.2 | 0.24 | 0.24 | 0.98 | 2.50 |
| 4 Jan | 30.7 | 16.1 | 0.31 | 0.31 | 1.42 | 3.60 |
| 5 Jan | 30.6 | 16.0 | 0.35 | 0.35 | 1.69 | 4.30 |
| 6 Jan | 30.6 | 15.9 | 0.43 | 0.43 | 2.09 | 5.30 |
| 7 Jan | 30.5 | 15.9 | 0.51 | 0.51 | 2.40 | 6.10 |
| 8 Jan | 30.4 | 15.8 | 0.59 | 0.59 | 2.80 | 7.10 |
| 9 Jan | 30.4 | 15.8 | 0.67 | 0.67 | 3.19 | 8.10 |
| 10 Jan | 30.3 | 15.7 | 0.71 | 0.71 | 3.50 | 8.90 |
| 11 Jan | 30.3 | 15.7 | 0.79 | 0.79 | 3.90 | 9.90 |
| 12 Jan | 30.3 | 15.6 | 0.87 | 0.87 | 4.21 | 10.70 |
| 13 Jan | 30.3 | 15.6 | 0.94 | 0.94 | 4.61 | 11.70 |
| 14 Jan | 30.3 | 15.5 | 0.98 | 0.98 | 4.88 | 12.40 |
| 15 Jan | 30.3 | 15.5 | 1.06 | 1.06 | 5.31 | 13.50 |
| 16 Jan | 30.3 | 15.5 | 1.14 | 1.14 | 5.59 | 14.20 |
| 17 Jan | 30.3 | 15.5 | 1.18 | 1.18 | 5.98 | 15.20 |
| 18 Jan | 30.3 | 15.5 | 1.26 | 1.26 | 6.42 | 16.30 |
| 19 Jan | 30.3 | 15.5 | 1.30 | 1.30 | 6.69 | 17.00 |
| 20 Jan | 30.4 | 15.5 | 1.38 | 1.38 | 7.09 | 18.00 |
| 21 Jan | 30.4 | 15.5 | 1.42 | 1.42 | 7.40 | 18.80 |
| 22 Jan | 30.5 | 15.6 | 1.46 | 1.46 | 7.80 | 19.80 |
| 23 Jan | 30.5 | 15.6 | 1.54 | 1.54 | 8.11 | 20.60 |
| 24 Jan | 30.6 | 15.7 | 1.57 | 1.57 | 8.39 | 21.30 |
| 25 Jan | 30.7 | 15.7 | 1.61 | 1.61 | 8.82 | 22.40 |
| 26 Jan | 30.8 | 15.8 | 1.65 | 1.65 | 9.09 | 23.10 |
| 27 Jan | 30.9 | 15.9 | 1.73 | 1.73 | 9.49 | 24.10 |
| 28 Jan | 31.0 | 16.0 | 1.77 | 1.77 | 9.80 | 24.90 |
| 29 Jan | 31.2 | 16.1 | 1.81 | 1.81 | 10.12 | 25.70 |
| 30 Jan | 31.3 | 16.2 | 1.89 | 1.89 | 10.51 | 26.70 |
| 31 Jan | 31.5 | 16.3 | 1.93 | 1.93 | 10.79 | 27.40 |
Weather history Romeoville - June 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Jun | 70.0 | 55.9 | 0.02 | 0.00 | 0.0 |
| 02 Jun | 75.9 | 45.0 | 0.00 | 0.00 | 0.0 |
| 03 Jun | 84.9 | 52.0 | 0.00 | 0.00 | 0.0 |
| 04 Jun | 86.0 | 57.9 | 0.00 | 0.00 | 0.0 |
| 05 Jun | 82.0 | 70.0 | 0.02 | 0.00 | 0.0 |
| 06 Jun | 90.0 | 68.0 | 0.12 | 0.00 | 0.0 |
| 07 Jun | 84.9 | 64.9 | 0.48 | 0.00 | 0.0 |
| 08 Jun | 81.0 | 64.9 | 1.48 | 0.00 | 0.0 |
| 09 Jun | 89.1 | 71.1 | T | 0.00 | 0.0 |
| 10 Jun | - | - | - | - | - |
| 11 Jun | - | - | - | - | - |
| 12 Jun | 80.1 | 59.0 | 0.00 | 0.00 | 0.0 |
| 13 Jun | 82.0 | 61.0 | 0.35 | 0.00 | 0.0 |
| 14 Jun | 72.0 | 57.0 | 0.50 | 0.00 | 0.0 |
| 15 Jun | - | - | - | - | - |
| 16 Jun | - | - | - | - | - |
| 17 Jun | 70.0 | 55.0 | 0.81 | 0.00 | 0.0 |
| 18 Jun | 73.0 | 59.0 | 0.00 | 0.00 | 0.0 |
| 19 Jun | 77.0 | 55.9 | T | 0.00 | 0.0 |
| 20 Jun | 77.0 | 57.9 | 0.03 | 0.00 | 0.0 |
| 21 Jun | - | - | - | - | - |
| 22 Jun | - | - | - | - | - |
| 23 Jun | - | - | - | - | - |
| 24 Jun | - | - | - | - | - |
| 25 Jun | - | - | - | - | - |
| 26 Jun | - | - | - | - | - |
| 27 Jun | - | - | - | - | - |
| 28 Jun | - | - | - | - | - |
| 29 Jun | - | - | - | - | - |
| 30 Jun | - | - | - | - | - |
Past weather Romeoville
| Jun 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 79.7 ºF | 31 ºF | |
| Average low temperature Av. low temp. | 59.7 ºF | 16 ºF | |
| Total precipitation Total precip. | 3.81 inch | 1.93 inch | |
| Total snowfall Total snowfall | 0.00 inch | 11 inch | |
| Highest max temperature Highest max temp. | 90.0 ºF | - | |
| Lowest max temperature Lowest max temp. | 70.0 ºF | - | |
| Highest min temperature Highest min temp. | 71.1 ºF | - | |
| Lowest min temperature Lowest min temp. | 45.0 ºF | - | |
Past weather June 2026 incomplete - Missing data
Geo Romeoville - Illinois
| Country | United States | |
|---|---|---|
| State | Illinois | |
| County | - | |
| City | Romeoville | |
| Zip Code | 60446 | |
| Longitude | -88.09 dec. degr. | |
| Latitude | 41.65 dec. degr. | |
| Altitude - Elevation | 620ft | |
| ICAO | - | |
| IATA | - |
Date and Time Romeoville - Illinois
| Local Time | 05:19 PM | |
|---|---|---|
| Sunrise | 05:17 AM | |
| Sunset | 08:32 PM | |
| Day/Night | Day | |
| Timezone | Central Daylight Time | |
| Timezone DB | America - Chicago |
Map of Romeoville - Illinois
USGS National Map — Open interactive map
Romeoville weather averages
| Annual high temperature | 59ºF |
| Annual low temperature | 41ºF |
| Average annual precip. | 40.07 inch |
| Av. annual snowfall | 32 inch |
Station Data
Monthly averages Romeoville
Longitude: -88.0895, Latitude: 41.6475
Average weather Romeoville, IL - 60446
Monthly: 1991-2020 normals
History: 2008-2026
Abbreviations
Average precipitation in : Av. precipitation in
Jan: January, Feb: February, ...Jan: January, Feb: February, ...Ja: January, Fe: February, ...