Royal, IL
Climate overview — based on NOAA 1991-2020 normals from OGDEN, IL US.
Year-round temperatures (°F)
Climate summary
Royal has an annual average temperature of 52.2°F with about 41.2 inches of precipitation per year and 25 inches of snow. The warmest month is July (average high 83.6°F), and the coldest is January (average low 18.2°F). May is typically the wettest month (4.96 in) and February the driest (2.18 in). Snow typically falls from November through April.
Best time to visit Royal
Full guide →Climate change signal
All-time records →274 of 366 (74.9%) of Royal's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 2000s | 0 | |
| 2010s | 172 | |
| 2020s | 194 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 34.0°F | 18.2°F | 26.1°F | 2.38 in | 5.9 in | 10 |
| February | 38.9°F | 21.6°F | 30.3°F | 2.18 in | 9.3 in | 10 |
| March | 50.6°F | 30.2°F | 40.4°F | 2.82 in | 3.0 in | 13 |
| April | 63.7°F | 40.8°F | 52.3°F | 3.88 in | 0.3 in | 12 |
| May | 73.3°F | 52.4°F | 62.9°F | 4.96 in | — | 14 |
| June | 81.6°F | 62.0°F | 71.8°F | 4.96 in | — | 13 |
| July | 83.6°F | 65.1°F | 74.4°F | 4.39 in | — | 11 |
| August | 82.6°F | 62.9°F | 72.8°F | 3.50 in | — | 10 |
| September | 77.9°F | 55.7°F | 66.8°F | 3.35 in | — | 9 |
| October | 65.7°F | 44.3°F | 55.0°F | 3.32 in | — | 11 |
| November | 51.1°F | 32.4°F | 41.8°F | 3.15 in | 1.0 in | 10 |
| December | 39.3°F | 23.9°F | 31.6°F | 2.35 in | 5.5 in | 11 |
Climate twins of Royal
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).