Royalton, Illinois Climate
United States
Pop. 1,138 Elev. 120 m / 394 ft
TZ: America/Chicago (UTC-5) ·
Summers in Royalton are warm, with July highs around 90°F (32°C), while winters are cold with January lows of 24°F (-4°C). Humidity pushes the summer feels-like temperature to around 108°F (42°C). Expect around 67 rainy days annually (42.7 in / 1085 mm total), with snow on 4 days and 20 in (497 mm) of annual accumulation. The city averages 134 sunny days per year and around 43 thunderstorm days. Nearby lake water reaches 83°F (29°C) in summer.
| Temperature | 90°F (32°C) high | 24°F (-5°C) low |
| Feels like | 108°F (42°C) high | 19°F (-7°C) low |
| Rain | 67 days | 42.7 in (1085 mm) /yr |
| Snow | 4 days | 19.6 in (497 mm) /yr |
| Sky | 134 sunny | 43 stormy |
| Wind | 2.4 mph (1.1 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 (%)
48
Jan 60
Feb 52
Mar 63
Apr 66
May 54
Jun 54
Jul 42
Aug 38
Sep 40
Oct 54
Nov 58
Dec Humidity (%)
63
Jan 68
Feb 51
Mar 62
Apr 65
May 70
Jun 75
Jul 67
Aug 62
Sep 68
Oct 68
Nov 70
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 10 mi Veterans Airport of Southern Illinois (MWA)
Ski resort 95 mi Hidden Valley
National park 7 mi Emmett Till and Mamie Till-Mobley National Monument
Hospital 7 mi Herrin Hospital
Hiking trail 12 mi Crab Orchard Visitor Center Pond and Woodland Nature Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 38°F 3°C | 24°F -5°C | 2.3 in 59 mm | 7.8 in197 mm | 12 |
| February | 46°F 8°C | 29°F -1°C | 3.0 in 77 mm | 8.5 in216 mm | 8 |
| March | 66°F 19°C | 44°F 7°C | 2.7 in 68 mm | 0.2 in4 mm | 12 |
| April | 72°F 22°C | 52°F 11°C | 7.2 in 183 mm | — | 6 |
| May | 75°F 24°C | 60°F 15°C | 6.0 in 153 mm | — | 8 |
| June | 86°F 30°C | 71°F 22°C | 5.0 in 128 mm | — | 9 |
| July | 90°F 32°C | 75°F 24°C | 4.8 in 122 mm | — | 11 |
| August | 86°F 30°C | 68°F 20°C | 0.5 in 13 mm | — | 17 |
| September | 85°F 29°C | 61°F 16°C | 2.9 in 72 mm | — | 15 |
| October | 72°F 22°C | 53°F 12°C | 4.5 in 115 mm | — | 18 |
| November | 59°F 15°C | 41°F 5°C | 2.8 in 70 mm | 1.0 in26 mm | 10 |
| December | 47°F 8°C | 33°F 0°C | 0.9 in 24 mm | 2.1 in53 mm | 8 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 12 | 1 |
| February | 8 | 2 |
| March | 12 | 3 |
| April | 6 | 8 |
| May | 8 | 4 |
| June | 9 | 7 |
| July | 11 | 8 |
| August | 17 | 1 |
| September | 15 | 2 |
| October | 18 | 4 |
| November | 10 | 3 |
| December | 8 | 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 |