Weather World
Heathrow Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 45°F Lo 36°F | Hi 47°F Lo 38°F | Hi 52°F Lo 39°F | Hi 58°F Lo 42°F | Hi 63°F Lo 47°F | Hi 69°F Lo 53°F | Hi 73°F Lo 57°F | Hi 72°F Lo 57°F | Hi 67°F Lo 53°F | Hi 60°F Lo 49°F | Hi 51°F Lo 43°F | Hi 47°F Lo 39°F |
| 10 mph | 11 mph | 10 mph | 9 mph | 8 mph | 8 mph | 8 mph | 8 mph | 8 mph | 9 mph | 10 mph | 10 mph |
| 2.4 in | 2 in | 1.7 in | 1.6 in | 2 in | 2.4 in | 2.1 in | 2.4 in | 1.9 in | 2.8 in | 2.7 in | 2.5 in |
| 85% | 83% | 79% | 74% | 75% | 74% | 70% | 71% | 74% | 80% | 84% | 86% |
| 57% | 61% | 55% | 50% | 51% | 50% | 49% | 47% | 48% | 56% | 59% | 60% |
| 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 29.9 in | 29.9 in | 29.9 in |
| 23 | 21 | 25 | 25 | 25 | 24 | 24 | 24 | 25 | 24 | 22 | 22 |
| 7 | 6 | 6 | 5 | 6 | 6 | 7 | 7 | 5 | 7 | 8 | 8 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | 2 | 2 | 3 | 4 | 5 | 4 | 4 | 3 | 3 | 2 | 2 |
| 118 | 84 | 119 | 138 | 117 | 123 | 118 | 138 | 138 | 115 | 108 | 111 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 7°C Lo 2°C | Hi 8°C Lo 3°C | Hi 11°C Lo 4°C | Hi 14°C Lo 6°C | Hi 17°C Lo 8°C | Hi 21°C Lo 12°C | Hi 23°C Lo 14°C | Hi 22°C Lo 14°C | Hi 20°C Lo 12°C | Hi 15°C Lo 9°C | Hi 11°C Lo 6°C | Hi 8°C Lo 4°C |
| 10 mph | 11 mph | 10 mph | 9 mph | 8 mph | 8 mph | 8 mph | 8 mph | 8 mph | 9 mph | 10 mph | 10 mph |
| 61 mm | 50 mm | 42 mm | 41 mm | 51 mm | 61 mm | 53 mm | 61 mm | 49 mm | 71 mm | 68 mm | 63 mm |
| 85% | 83% | 79% | 74% | 75% | 74% | 70% | 71% | 74% | 80% | 84% | 86% |
| 57% | 61% | 55% | 50% | 51% | 50% | 49% | 47% | 48% | 56% | 59% | 60% |
| 1015 mb | 1015 mb | 1015 mb | 1016 mb | 1017 mb | 1016 mb | 1016 mb | 1015 mb | 1016 mb | 1014 mb | 1012 mb | 1014 mb |
| 23 | 21 | 25 | 25 | 25 | 24 | 24 | 24 | 25 | 24 | 22 | 22 |
| 7 | 6 | 6 | 5 | 6 | 6 | 7 | 7 | 5 | 7 | 8 | 8 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2 | 2 | 2 | 3 | 4 | 5 | 4 | 4 | 3 | 3 | 2 | 2 |
| 118 | 84 | 119 | 138 | 117 | 123 | 118 | 138 | 138 | 115 | 108 | 111 |
| 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.