Northbrook, Illinois Climate
United States
Pop. 33,663 Elev. 199 m / 653 ft
TZ: America/Chicago (UTC-5) ·
Northbrook is largely arid, with warm summers peaking at 77°F (25°C) in July and cold winters around 21°F (-6°C) in January. Wind chill can push winter lows to 10°F (-12°C). Precipitation occurs on roughly 42 days per year (30.3 in / 769 mm total), with snow on 6 days and 45 in (1144 mm) of annual accumulation. The city averages 116 sunny days per year and around 27 thunderstorm days. Ocean water temperatures reach 75°F (24°C) in summer.
| Temperature | 77°F (25°C) high | 21°F (-6°C) low |
| Feels like | 10°F (-12°C) low | |
| Rain | 42 days | 30.3 in (769 mm) /yr |
| Snow | 6 days | 45.0 in (1144 mm) /yr |
| Sky | 116 sunny | 27 stormy |
| Wind | 3.9 mph (1.7 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 (%)
63
Jan 71
Feb 60
Mar 65
Apr 62
May 52
Jun 58
Jul 46
Aug 32
Sep 44
Oct 60
Nov 85
Dec Humidity (%)
64
Jan 71
Feb 72
Mar 78
Apr 85
May 83
Jun 85
Jul 76
Aug 77
Sep 71
Oct 70
Nov 77
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 11 mi Chicago O'Hare International Airport (ORD)
Ski resort 3 mi
National park 32 mi Pullman National Historical Park
Hospital 3 mi Glenbrook Hospital
Hiking trail 0 mi OBT-8
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 31°F -1°C | 21°F -6°C | 0.9 in 23 mm | 5.3 in133 mm | 6 |
| February | 33°F 0°C | 23°F -5°C | 0.3 in 9 mm | 10.9 in277 mm | 3 |
| March | 46°F 8°C | 35°F 1°C | 3.4 in 87 mm | 5.2 in133 mm | 9 |
| April | 49°F 9°C | 40°F 5°C | 3.2 in 80 mm | 0.2 in5 mm | 5 |
| May | 53°F 11°C | 46°F 8°C | 3.9 in 98 mm | — | 9 |
| June | 69°F 21°C | 60°F 16°C | 4.1 in 105 mm | — | 10 |
| July | 77°F 25°C | 69°F 21°C | 4.0 in 101 mm | — | 10 |
| August | 75°F 24°C | 69°F 20°C | 2.0 in 51 mm | — | 18 |
| September | 70°F 21°C | 64°F 18°C | 0.8 in 21 mm | — | 18 |
| October | 62°F 17°C | 56°F 13°C | 2.9 in 75 mm | — | 17 |
| November | 48°F 9°C | 41°F 5°C | 1.8 in 44 mm | 14.8 in375 mm | 10 |
| December | 35°F 2°C | 26°F -3°C | 2.9 in 75 mm | 8.7 in221 mm | 1 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 6 | 1 |
| February | 3 | 0 |
| March | 9 | 4 |
| April | 5 | 1 |
| May | 9 | 3 |
| June | 10 | 3 |
| July | 10 | 6 |
| August | 18 | 4 |
| September | 18 | 1 |
| October | 17 | 2 |
| November | 10 | 1 |
| December | 1 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 37°F 3°C | 34°F 1°C |
| February | 35°F 1°C | 33°F 1°C |
| March | 37°F 3°C | 36°F 2°C |
| April | 44°F 7°C | 41°F 5°C |
| May | 49°F 9°C | 48°F 9°C |
| June | 67°F 20°C | 61°F 16°C |
| July | 75°F 24°C | 74°F 23°C |
| August | 74°F 24°C | 75°F 24°C |
| September | 69°F 21°C | 69°F 21°C |
| October | 67°F 20°C | 61°F 16°C |
| November | 52°F 11°C | 48°F 9°C |
| December | 43°F 6°C | 38°F 4°C |