Riverwoods, Illinois Climate
United States
Pop. 3,643 Elev. 208 m / 682 ft
TZ: America/Chicago (UTC-5) ·
Riverwoods is largely arid, with warm summers peaking at 82°F (28°C) in July and cold winters around 17°F (-8°C) in January. Humidity pushes the summer feels-like temperature to 88°F (31°C), while wind chill can drive winter lows to 7°F (-14°C). Precipitation occurs on roughly 40 days per year (29.3 in / 745 mm total), with snow on 5 days and 38 in (954 mm) of annual accumulation. The city averages 117 sunny days per year and around 27 thunderstorm days. Ocean water temperatures reach 75°F (24°C) in summer.
| Temperature | 82°F (28°C) high | 17°F (-8°C) low |
| Feels like | 88°F (31°C) high | 7°F (-14°C) low |
| Rain | 40 days | 29.3 in (745 mm) /yr |
| Snow | 5 days | 37.6 in (954 mm) /yr |
| Sky | 117 sunny | 27 stormy |
| Wind | 2.9 mph (1.3 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
56
Jan 66
Feb 59
Mar 66
Apr 62
May 53
Jun 59
Jul 49
Aug 34
Sep 45
Oct 59
Nov 79
Dec Humidity (%)
59
Jan 67
Feb 63
Mar 66
Apr 72
May 71
Jun 77
Jul 73
Aug 72
Sep 70
Oct 68
Nov 73
Dec Weather Days by Month
Water Temperatures
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Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 13 mi Chicago O'Hare International Airport (ORD)
Ski resort 3 mi
National park 36 mi Pullman National Historical Park
Hospital 6 mi Glenbrook Hospital
Hiking trail 4 mi OBT-8
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 30°F -1°C | 17°F -8°C | 0.8 in 20 mm | 4.0 in101 mm | 10 |
| February | 33°F 1°C | 20°F -7°C | 0.3 in 7 mm | 9.6 in243 mm | 4 |
| March | 53°F 11°C | 35°F 1°C | 3.2 in 81 mm | 4.9 in123 mm | 8 |
| April | 56°F 13°C | 42°F 5°C | 2.9 in 74 mm | 0.1 in4 mm | 5 |
| May | 61°F 16°C | 48°F 9°C | 3.8 in 95 mm | — | 9 |
| June | 78°F 26°C | 63°F 17°C | 4.2 in 106 mm | — | 10 |
| July | 82°F 28°C | 69°F 21°C | 4.5 in 115 mm | — | 9 |
| August | 78°F 26°C | 66°F 19°C | 2.4 in 62 mm | — | 15 |
| September | 74°F 24°C | 60°F 15°C | 1.6 in 42 mm | — | 18 |
| October | 64°F 18°C | 52°F 11°C | 2.4 in 61 mm | — | 17 |
| November | 48°F 9°C | 37°F 3°C | 1.3 in 34 mm | 11.3 in288 mm | 11 |
| December | 35°F 1°C | 22°F -5°C | 1.9 in 49 mm | 7.7 in195 mm | 1 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 10 | 1 |
| February | 4 | 0 |
| March | 8 | 3 |
| April | 5 | 1 |
| May | 9 | 3 |
| June | 10 | 3 |
| July | 9 | 5 |
| August | 15 | 4 |
| September | 18 | 4 |
| October | 17 | 2 |
| November | 11 | 0 |
| December | 1 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 37°F 3°C | 33°F 0°C |
| February | 35°F 1°C | 32°F 0°C |
| March | 37°F 3°C | 37°F 3°C |
| April | 44°F 7°C | 46°F 8°C |
| May | 49°F 9°C | 53°F 12°C |
| June | 67°F 20°C | 65°F 19°C |
| July | 75°F 24°C | 75°F 24°C |
| August | 74°F 24°C | 73°F 23°C |
| September | 69°F 21°C | 66°F 19°C |
| October | 67°F 20°C | 59°F 15°C |
| November | 52°F 11°C | 44°F 7°C |
| December | 43°F 6°C | 34°F 1°C |