Weather World
Town of Old Lyme, CT
Old Lyme Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 37°F Lo 26°F | Hi 38°F Lo 26°F | Hi 45°F Lo 33°F | Hi 55°F Lo 42°F | Hi 65°F Lo 51°F | Hi 74°F Lo 59°F | Hi 81°F Lo 67°F | Hi 80°F Lo 66°F | Hi 73°F Lo 60°F | Hi 63°F Lo 51°F | Hi 52°F Lo 40°F | Hi 42°F Lo 32°F |
| 11 mph | 10 mph | 10 mph | 10 mph | 8 mph | 8 mph | 7 mph | 7 mph | 8 mph | 9 mph | 10 mph | 10 mph |
| 3.8 in | 4.4 in | 4.7 in | 4.3 in | 4.8 in | 4.6 in | 4.7 in | 4.4 in | 3.9 in | 5.1 in | 4.1 in | 6.4 in |
| 73% | 76% | 73% | 73% | 77% | 78% | 79% | 77% | 77% | 75% | 72% | 74% |
| 45% | 48% | 47% | 46% | 46% | 40% | 36% | 34% | 37% | 42% | 37% | 47% |
| 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 29.9 in | 30.0 in | 30.0 in | 30.1 in | 30.0 in | 30.1 in | 30.1 in |
| 21 | 17 | 22 | 23 | 23 | 22 | 22 | 23 | 24 | 24 | 24 | 22 |
| 7 | 8 | 7 | 7 | 8 | 8 | 9 | 8 | 6 | 7 | 6 | 7 |
| 4 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| 1 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 |
| 2 | 1 | 2 | 3 | 4 | 6 | 6 | 5 | 4 | 3 | 2 | 1 |
| 179 | 144 | 167 | 167 | 186 | 201 | 224 | 234 | 209 | 184 | 203 | 170 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 3°C Lo -4°C | Hi 4°C Lo -3°C | Hi 7°C Lo 0°C | Hi 13°C Lo 5°C | Hi 18°C Lo 10°C | Hi 23°C Lo 15°C | Hi 27°C Lo 19°C | Hi 26°C Lo 19°C | Hi 23°C Lo 15°C | Hi 17°C Lo 10°C | Hi 11°C Lo 4°C | Hi 6°C Lo 0°C |
| 17 km/h | 16 km/h | 17 km/h | 16 km/h | 13 km/h | 12 km/h | 12 km/h | 12 km/h | 13 km/h | 15 km/h | 16 km/h | 17 km/h |
| 95 mm | 112 mm | 120 mm | 110 mm | 123 mm | 118 mm | 120 mm | 113 mm | 98 mm | 129 mm | 105 mm | 163 mm |
| 73% | 76% | 73% | 73% | 77% | 78% | 79% | 77% | 77% | 75% | 72% | 74% |
| 45% | 48% | 47% | 46% | 46% | 40% | 36% | 34% | 37% | 42% | 37% | 47% |
| 1016 mb | 1017 mb | 1017 mb | 1015 mb | 1016 mb | 1014 mb | 1014 mb | 1016 mb | 1018 mb | 1017 mb | 1018 mb | 1018 mb |
| 21 | 17 | 22 | 23 | 23 | 22 | 22 | 23 | 24 | 24 | 24 | 22 |
| 7 | 8 | 7 | 7 | 8 | 8 | 9 | 8 | 6 | 7 | 6 | 7 |
| 4 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| 1 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 |
| 2 | 1 | 2 | 3 | 4 | 6 | 6 | 5 | 4 | 3 | 2 | 1 |
| 179 | 144 | 167 | 167 | 186 | 201 | 224 | 234 | 209 | 184 | 203 | 170 |
| 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.