Effingham, Illinois Climate
United States
Pop. 12,604 Elev. 181 m / 594 ft
TZ: America/Chicago (UTC-5) ·
Summers in Effingham are warm, with July highs around 89°F (32°C), while winters are frigid with January lows of 19°F (-7°C). Humidity pushes the summer feels-like temperature to around 105°F (41°C). Expect around 60 rainy days annually (39.7 in / 1008 mm total), with snow on 5 days and 28 in (700 mm) of annual accumulation. The city averages 130 sunny days per year and around 43 thunderstorm days. Nearby lake water reaches 82°F (28°C) in summer.
| Temperature | 89°F (31°C) high | 19°F (-7°C) low |
| Feels like | 105°F (40°C) high | 13°F (-11°C) low |
| Rain | 60 days | 39.7 in (1008 mm) /yr |
| Snow | 5 days | 27.6 in (700 mm) /yr |
| Sky | 130 sunny | 43 stormy |
| Wind | 2.3 mph (1.0 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Mar, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
49
Jan 61
Feb 53
Mar 64
Apr 64
May 58
Jun 59
Jul 44
Aug 34
Sep 44
Oct 52
Nov 64
Dec Humidity (%)
67
Jan 64
Feb 53
Mar 60
Apr 63
May 68
Jun 75
Jul 68
Aug 62
Sep 66
Oct 68
Nov 72
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 52 mi Decatur Airport (DEC)
Ski resort 121 mi Hidden Valley
National park 70 mi Shakamak State Park
Mountain peak
(5,125 ft) 361 mi Little Haw Knob
Hospital 1 mi Saint Anthony's Memorial Hospital
Hiking trail 55 mi Bluestem Loop
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 34°F 1°C | 19°F -7°C | 0.9 in 24 mm | 11.9 in302 mm | 13 |
| February | 43°F 6°C | 27°F -3°C | 1.6 in 40 mm | 5.5 in138 mm | 9 |
| March | 64°F 18°C | 41°F 5°C | 3.7 in 94 mm | 0.5 in13 mm | 13 |
| April | 69°F 21°C | 49°F 9°C | 6.1 in 154 mm | — | 5 |
| May | 74°F 23°C | 57°F 14°C | 4.5 in 115 mm | — | 7 |
| June | 85°F 30°C | 69°F 21°C | 5.5 in 140 mm | — | 9 |
| July | 89°F 31°C | 73°F 23°C | 5.7 in 145 mm | — | 8 |
| August | 84°F 29°C | 65°F 19°C | 0.8 in 22 mm | — | 15 |
| September | 83°F 28°C | 59°F 15°C | 3.3 in 83 mm | — | 18 |
| October | 71°F 21°C | 51°F 10°C | 3.4 in 87 mm | — | 18 |
| November | 55°F 13°C | 38°F 4°C | 3.2 in 82 mm | 4.0 in102 mm | 10 |
| December | 43°F 6°C | 29°F -2°C | 0.9 in 23 mm | 5.7 in146 mm | 5 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 13 | 0 |
| February | 9 | 1 |
| March | 13 | 3 |
| April | 5 | 8 |
| May | 7 | 5 |
| June | 9 | 6 |
| July | 8 | 7 |
| August | 15 | 3 |
| September | 18 | 4 |
| October | 18 | 2 |
| November | 10 | 3 |
| December | 5 | 1 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 33°F 1°C |
| February | 33°F 0°C |
| March | 48°F 9°C |
| April | 58°F 14°C |
| May | 65°F 18°C |
| June | 76°F 24°C |
| July | 82°F 28°C |
| August | 77°F 25°C |
| September | 71°F 22°C |
| October | 62°F 17°C |
| November | 46°F 8°C |
| December | 34°F 1°C |