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Macoupin County, IL Official Website
Macoupin County Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 36°F Lo 22°F | Hi 41°F Lo 26°F | Hi 54°F Lo 37°F | Hi 63°F Lo 46°F | Hi 73°F Lo 56°F | Hi 82°F Lo 65°F | Hi 85°F Lo 68°F | Hi 84°F Lo 66°F | Hi 79°F Lo 60°F | Hi 66°F Lo 49°F | Hi 53°F Lo 37°F | Hi 42°F Lo 29°F |
| 10 mph | 10 mph | 10 mph | 10 mph | 8 mph | 7 mph | 6 mph | 6 mph | 7 mph | 9 mph | 10 mph | 10 mph |
| 2.6 in | 3 in | 4.3 in | 6.7 in | 6.5 in | 5 in | 5.1 in | 4.1 in | 3.8 in | 3.8 in | 3.4 in | 3 in |
| 77% | 77% | 75% | 75% | 78% | 78% | 81% | 79% | 72% | 68% | 71% | 76% |
| 53% | 52% | 48% | 45% | 42% | 31% | 32% | 30% | 29% | 34% | 38% | 50% |
| 30.1 in | 30.1 in | 30.0 in | 30.0 in | 30.0 in | 29.9 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 21 | 19 | 22 | 21 | 21 | 21 | 22 | 24 | 25 | 25 | 24 | 23 |
| 7 | 6 | 8 | 8 | 10 | 9 | 9 | 7 | 5 | 6 | 5 | 6 |
| 4 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
| 2 | 2 | 3 | 4 | 5 | 6 | 5 | 5 | 5 | 3 | 2 | 2 |
| 146 | 139 | 157 | 161 | 184 | 230 | 229 | 237 | 239 | 215 | 199 | 156 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 2°C Lo -5°C | Hi 5°C Lo -4°C | Hi 12°C Lo 3°C | Hi 17°C Lo 8°C | Hi 23°C Lo 14°C | Hi 28°C Lo 19°C | Hi 29°C Lo 20°C | Hi 29°C Lo 19°C | Hi 26°C Lo 16°C | Hi 19°C Lo 9°C | Hi 11°C Lo 3°C | Hi 6°C Lo -2°C |
| 16 km/h | 16 km/h | 16 km/h | 16 km/h | 13 km/h | 12 km/h | 10 km/h | 10 km/h | 11 km/h | 15 km/h | 15 km/h | 15 km/h |
| 65 mm | 75 mm | 110 mm | 169 mm | 164 mm | 127 mm | 129 mm | 104 mm | 97 mm | 96 mm | 86 mm | 75 mm |
| 77% | 77% | 75% | 75% | 78% | 78% | 81% | 79% | 72% | 68% | 71% | 76% |
| 53% | 52% | 48% | 45% | 42% | 31% | 32% | 30% | 29% | 34% | 38% | 50% |
| 1021 mb | 1020 mb | 1017 mb | 1014 mb | 1014 mb | 1013 mb | 1015 mb | 1015 mb | 1017 mb | 1017 mb | 1020 mb | 1020 mb |
| 21 | 19 | 22 | 21 | 21 | 21 | 22 | 24 | 25 | 25 | 24 | 23 |
| 7 | 6 | 8 | 8 | 10 | 9 | 9 | 7 | 5 | 6 | 5 | 6 |
| 4 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
| 2 | 2 | 3 | 4 | 5 | 6 | 5 | 5 | 5 | 3 | 2 | 2 |
| 146 | 139 | 157 | 161 | 184 | 230 | 229 | 237 | 239 | 215 | 199 | 156 |
| Month |
| Avg. Temperatures |
| Avg. Wind Speed |
| Avg. Precipitation |
| Average Humidity |
| Avg. Cloud Cover |
| Pressure Average |
| Average Dry Days |
| Avg. Precip. Days |
| Avg. Snow Days |
| Average Fog Days |
| Average UV Index |
| Avg. Hours of Sun |
Averages are based on historical weather data from the past 10 years.