Chester, Illinois Climate
United States
Pop. 8,588 Elev. 201 m / 659 ft
TZ: America/Chicago (UTC-5) ·
Summers in Chester are warm, with July highs around 89°F (32°C), while winters are frigid with January lows of 23°F (-5°C). Humidity pushes the summer feels-like temperature to around 108°F (42°C). Expect around 65 rainy days annually (44.2 in / 1122 mm total), with snow on 5 days and 22 in (547 mm) of annual accumulation. The city averages 130 sunny days per year and around 48 thunderstorm days. Nearby lake water reaches 83°F (29°C) in summer.
| Temperature | 89°F (32°C) high | 23°F (-5°C) low |
| Feels like | 108°F (42°C) high | 19°F (-7°C) low |
| Rain | 65 days | 44.2 in (1122 mm) /yr |
| Snow | 5 days | 21.5 in (547 mm) /yr |
| Sky | 130 sunny | 48 stormy |
| Wind | 2.2 mph (1.0 m/s) avg |
Looking for a place with a climate like Chester? Explore and filter 150,000+ cities worldwide.
Explore on the MapMonthly Climate Chart
Best months to visit: Mar, Aug, Sep
Sky & Air by Month
Cloud cover (%)
46
Jan 60
Feb 52
Mar 64
Apr 67
May 56
Jun 56
Jul 43
Aug 41
Sep 40
Oct 54
Nov 55
Dec Humidity (%)
61
Jan 67
Feb 50
Mar 63
Apr 67
May 73
Jun 76
Jul 66
Aug 63
Sep 68
Oct 67
Nov 69
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 44 mi Scott AFB/Midamerica Airport (BLV)
Ski resort 62 mi Hidden Valley
National park 45 mi Emmett Till and Mamie Till-Mobley National Monument
Hospital 1 mi Memorial Hospital
Hiking trail 16 mi ADT - Illinois (South) - J - Seg 3
Interested in Chester?
Hotels
Flights
Real Estate
Insurance
Connectivity
Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 38°F 4°C | 23°F -5°C | 2.1 in 53 mm | 7.8 in198 mm | 13 |
| February | 45°F 7°C | 28°F -2°C | 2.3 in 58 mm | 8.5 in217 mm | 8 |
| March | 66°F 19°C | 43°F 6°C | 2.4 in 61 mm | 0.1 in3 mm | 12 |
| April | 71°F 22°C | 51°F 10°C | 6.9 in 175 mm | — | 6 |
| May | 74°F 24°C | 58°F 14°C | 5.2 in 132 mm | — | 8 |
| June | 85°F 30°C | 70°F 21°C | 6.7 in 171 mm | — | 8 |
| July | 89°F 32°C | 74°F 23°C | 4.6 in 117 mm | — | 10 |
| August | 86°F 30°C | 66°F 19°C | 0.6 in 16 mm | — | 14 |
| September | 85°F 29°C | 60°F 16°C | 4.5 in 114 mm | — | 14 |
| October | 72°F 22°C | 52°F 11°C | 5.3 in 135 mm | — | 18 |
| November | 59°F 15°C | 41°F 5°C | 2.9 in 73 mm | 3.3 in83 mm | 10 |
| December | 47°F 8°C | 32°F 0°C | 0.7 in 17 mm | 1.8 in47 mm | 9 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 13 | 1 |
| February | 8 | 1 |
| March | 12 | 3 |
| April | 6 | 9 |
| May | 8 | 8 |
| June | 8 | 8 |
| July | 10 | 7 |
| August | 14 | 1 |
| September | 14 | 4 |
| October | 18 | 2 |
| November | 10 | 4 |
| December | 9 | 0 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 34°F 1°C |
| February | 34°F 1°C |
| March | 48°F 9°C |
| April | 59°F 15°C |
| May | 66°F 19°C |
| June | 77°F 25°C |
| July | 83°F 29°C |
| August | 79°F 26°C |
| September | 72°F 22°C |
| October | 64°F 18°C |
| November | 49°F 9°C |
| December | 36°F 2°C |