Stillman Valley, Illinois Climate
United States
Pop. 1,072 Elev. 219 m / 719 ft
TZ: America/Chicago (UTC-5) ·
Dry and warm, Stillman Valley sees July highs of 85°F (29°C) and cold January lows of 15°F (-9°C). Humidity pushes the summer feels-like temperature to 94°F (34°C), while wind chill can drive winter lows to 6°F (-14°C). Expect around 43 rainy days annually (32.5 in / 825 mm total), with snow on 6 days and 34 in (872 mm) of annual accumulation. The city averages 118 sunny days per year and around 34 thunderstorm days. Nearby lake water reaches 77°F (25°C) in summer.
| Temperature | 85°F (29°C) high | 15°F (-10°C) low |
| Feels like | 94°F (35°C) high | 6°F (-15°C) low |
| Rain | 43 days | 32.5 in (825 mm) /yr |
| Snow | 6 days | 34.3 in (872 mm) /yr |
| Sky | 118 sunny | 34 stormy |
| Wind | 2.6 mph (1.2 m/s) avg |
Looking for a place with a climate like Stillman Valley? Explore and filter 150,000+ cities worldwide.
Explore on the MapMonthly Climate Chart
Best months to visit: Apr, May, Sep, Oct
Sky & Air by Month
Cloud cover (%)
53
Jan 63
Feb 54
Mar 68
Apr 58
May 53
Jun 60
Jul 53
Aug 37
Sep 45
Oct 56
Nov 76
Dec Humidity (%)
60
Jan 66
Feb 59
Mar 60
Apr 60
May 65
Jun 74
Jul 74
Aug 67
Sep 66
Oct 67
Nov 76
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 7 mi Chicago Rockford International Airport (RFD)
Ski resort 45 mi
National park 86 mi Historic Pullman Foundation Exhibit Hall
Hospital 12 mi UW Health Women and Children's Hospital
Hiking trail 13 mi Forest Ridge
Interested in Stillman Valley?
Hotels
Flights
Real Estate
Insurance
Connectivity
Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 30°F -1°C | 15°F -10°C | 1.0 in 26 mm | 2.6 in65 mm | 13 |
| February | 34°F 1°C | 18°F -8°C | 0.1 in 3 mm | 7.2 in183 mm | 5 |
| March | 56°F 13°C | 34°F 1°C | 3.5 in 89 mm | 6.6 in168 mm | 10 |
| April | 62°F 16°C | 42°F 6°C | 3.3 in 85 mm | 0.0 in0 mm | 4 |
| May | 70°F 21°C | 50°F 10°C | 3.2 in 82 mm | — | 11 |
| June | 84°F 29°C | 64°F 18°C | 4.0 in 102 mm | — | 10 |
| July | 85°F 29°C | 69°F 21°C | 6.2 in 158 mm | — | 7 |
| August | 80°F 26°C | 63°F 17°C | 4.7 in 118 mm | — | 14 |
| September | 78°F 26°C | 56°F 13°C | 2.0 in 50 mm | — | 18 |
| October | 67°F 19°C | 49°F 9°C | 1.6 in 41 mm | — | 12 |
| November | 50°F 10°C | 35°F 1°C | 1.1 in 28 mm | 10.6 in268 mm | 10 |
| December | 33°F 1°C | 19°F -7°C | 1.7 in 43 mm | 7.4 in187 mm | 4 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 13 | 1 |
| February | 5 | 0 |
| March | 10 | 4 |
| April | 4 | 1 |
| May | 11 | 2 |
| June | 10 | 4 |
| July | 7 | 8 |
| August | 14 | 7 |
| September | 18 | 5 |
| October | 12 | 1 |
| November | 10 | 0 |
| December | 4 | 1 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 32°F 0°C |
| February | 32°F 0°C |
| March | 36°F 2°C |
| April | 46°F 8°C |
| May | 56°F 13°C |
| June | 69°F 21°C |
| July | 77°F 25°C |
| August | 72°F 22°C |
| September | 65°F 18°C |
| October | 58°F 14°C |
| November | 42°F 5°C |
| December | 32°F 0°C |