Seneca, Illinois Climate
United States
Pop. 2,292 Elev. 157 m / 515 ft
TZ: America/Chicago (UTC-5) ·
Seneca has a dry climate with warm summers reaching 87°F (31°C) in July and cold winters averaging 16°F (-9°C) in January. Humidity pushes the summer feels-like temperature to 98°F (37°C), while wind chill can drive winter lows to 7°F (-14°C). Rain falls on about 45 days per year (33.9 in / 860 mm total), with snow on 4 days and 31 in (789 mm) of annual accumulation. The city averages 120 sunny days per year and around 37 thunderstorm days.
| Temperature | 87°F (30°C) high | 16°F (-9°C) low |
| Feels like | 98°F (37°C) high | 7°F (-14°C) low |
| Rain | 45 days | 33.9 in (860 mm) /yr |
| Snow | 4 days | 31.1 in (789 mm) /yr |
| Sky | 120 sunny | 37 stormy |
| Wind | 2.8 mph (1.3 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Apr, May, Sep, Oct
Sky & Air by Month
Cloud cover (%)
54
Jan 62
Feb 54
Mar 67
Apr 60
May 53
Jun 65
Jul 53
Aug 35
Sep 45
Oct 56
Nov 74
Dec Humidity (%)
61
Jan 64
Feb 56
Mar 59
Apr 61
May 65
Jun 73
Jul 74
Aug 64
Sep 63
Oct 65
Nov 76
Dec Weather Days by Month
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 60 mi Central Illinois Regional Airport at Bloomington-Normal (BMI)
Ski resort 45 mi
National park 58 mi Historic Pullman Foundation Exhibit Hall
Hospital 10 mi Morris Hospital
Hiking trail 9 mi ADT - Illinois - I - Seg 2
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 32°F 0°C | 16°F -9°C | 0.6 in 16 mm | 5.3 in135 mm | 13 |
| February | 37°F 3°C | 21°F -6°C | 0.2 in 5 mm | 6.0 in153 mm | 8 |
| March | 59°F 15°C | 37°F 3°C | 3.4 in 86 mm | 3.9 in99 mm | 11 |
| April | 64°F 18°C | 45°F 7°C | 3.4 in 87 mm | 0.0 in1 mm | 5 |
| May | 72°F 22°C | 52°F 11°C | 3.5 in 90 mm | — | 9 |
| June | 85°F 29°C | 66°F 19°C | 4.6 in 116 mm | — | 10 |
| July | 87°F 30°C | 70°F 21°C | 6.3 in 159 mm | — | 6 |
| August | 81°F 27°C | 64°F 18°C | 4.7 in 120 mm | — | 12 |
| September | 81°F 27°C | 57°F 14°C | 1.6 in 40 mm | — | 20 |
| October | 69°F 20°C | 49°F 10°C | 2.7 in 68 mm | — | 13 |
| November | 52°F 11°C | 36°F 2°C | 1.2 in 31 mm | 8.7 in220 mm | 10 |
| December | 36°F 2°C | 21°F -6°C | 1.6 in 42 mm | 7.1 in180 mm | 3 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 13 | 1 |
| February | 8 | 0 |
| March | 11 | 5 |
| April | 5 | 2 |
| May | 9 | 3 |
| June | 10 | 5 |
| July | 6 | 11 |
| August | 12 | 5 |
| September | 20 | 2 |
| October | 13 | 2 |
| November | 10 | 0 |
| December | 3 | 1 |