Hamilton, Illinois Climate
United States
Pop. 2,853 Elev. 199 m / 653 ft
TZ: America/Chicago (UTC-5) ·
Hamilton has a dry climate with hot summers reaching 90°F (32°C) in July and cold winters averaging 17°F (-8°C) in January. Humidity pushes the summer feels-like temperature to 104°F (40°C), while wind chill can drive winter lows to 10°F (-12°C). Rain falls on about 38 days per year (26.5 in / 672 mm total), with snow on 4 days and 31 in (776 mm) of annual accumulation. The city averages 127 sunny days per year and around 28 thunderstorm days. Nearby lake water reaches 80°F (26°C) in summer.
| Temperature | 90°F (32°C) high | 17°F (-8°C) low |
| Feels like | 104°F (40°C) high | 10°F (-12°C) low |
| Rain | 38 days | 26.5 in (672 mm) /yr |
| Snow | 4 days | 30.5 in (776 mm) /yr |
| Sky | 127 sunny | 28 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, May, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
47
Jan 58
Feb 49
Mar 66
Apr 53
May 51
Jun 63
Jul 48
Aug 43
Sep 45
Oct 50
Nov 67
Dec Humidity (%)
63
Jan 64
Feb 57
Mar 60
Apr 55
May 66
Jun 69
Jul 67
Aug 53
Sep 58
Oct 64
Nov 76
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 29 mi Southeast Iowa Regional Airport (BRL)
Ski resort 134 mi Hidden Valley
National park 181 mi Pikes Peak State Park
Hospital 3 mi Keokuk Area Hospital
Hiking trail 46 mi
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 33°F 1°C | 17°F -8°C | 0.5 in 12 mm | 5.1 in129 mm | 12 |
| February | 38°F 3°C | 22°F -6°C | 0.1 in 3 mm | 3.7 in94 mm | 8 |
| March | 61°F 16°C | 38°F 3°C | 2.8 in 71 mm | 5.1 in129 mm | 13 |
| April | 67°F 19°C | 46°F 8°C | 4.5 in 115 mm | 0.0 in1 mm | 6 |
| May | 75°F 24°C | 54°F 12°C | 2.7 in 68 mm | — | 12 |
| June | 86°F 30°C | 67°F 19°C | 5.3 in 135 mm | — | 11 |
| July | 90°F 32°C | 72°F 22°C | 4.0 in 100 mm | — | 7 |
| August | 85°F 29°C | 66°F 19°C | 1.8 in 46 mm | — | 13 |
| September | 85°F 29°C | 59°F 15°C | 0.8 in 20 mm | — | 12 |
| October | 73°F 23°C | 52°F 11°C | 1.5 in 38 mm | — | 15 |
| November | 55°F 13°C | 37°F 3°C | 1.2 in 30 mm | 9.3 in237 mm | 12 |
| December | 38°F 4°C | 22°F -6°C | 1.3 in 34 mm | 7.3 in186 mm | 6 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 12 | 1 |
| February | 8 | 0 |
| March | 13 | 3 |
| April | 6 | 4 |
| May | 12 | 2 |
| June | 11 | 3 |
| July | 7 | 6 |
| August | 13 | 3 |
| September | 12 | 1 |
| October | 15 | 2 |
| November | 12 | 2 |
| December | 6 | 1 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 32°F 0°C |
| February | 32°F 0°C |
| March | 40°F 5°C |
| April | 52°F 11°C |
| May | 61°F 16°C |
| June | 71°F 22°C |
| July | 80°F 26°C |
| August | 76°F 24°C |
| September | 69°F 21°C |
| October | 62°F 17°C |
| November | 45°F 7°C |
| December | 32°F 0°C |