WeatherWX.com
San Juan Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 80°F Lo 73°F | Hi 80°F Lo 72°F | Hi 81°F Lo 73°F | Hi 82°F Lo 74°F | Hi 83°F Lo 76°F | Hi 85°F Lo 77°F | Hi 85°F Lo 78°F | Hi 85°F Lo 78°F | Hi 85°F Lo 78°F | Hi 84°F Lo 77°F | Hi 82°F Lo 75°F | Hi 80°F Lo 74°F |
| 9 mph | 10 mph | 9 mph | 9 mph | 9 mph | 9 mph | 10 mph | 10 mph | 8 mph | 7 mph | 8 mph | 9 mph |
| 0.5 in | 0.4 in | 0.7 in | 0.8 in | 1.6 in | 0.7 in | 1 in | 1.6 in | 2.1 in | 1.9 in | 1.8 in | 0.7 in |
| 78% | 78% | 77% | 77% | 79% | 79% | 79% | 79% | 79% | 79% | 80% | 79% |
| 43% | 42% | 40% | 39% | 46% | 42% | 46% | 45% | 43% | 43% | 48% | 45% |
| 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 | 30.0 in |
| 29 | 26 | 27 | 25 | 21 | 24 | 24 | 22 | 18 | 19 | 20 | 28 |
| 2 | 3 | 5 | 5 | 10 | 6 | 7 | 9 | 12 | 12 | 10 | 3 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 60 | 58 | 65 | 64 | 51 | 59 | 55 | 57 | 58 | 60 | 47 | 53 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 27°C Lo 23°C | Hi 27°C Lo 22°C | Hi 27°C Lo 23°C | Hi 28°C Lo 23°C | Hi 28°C Lo 24°C | Hi 29°C Lo 25°C | Hi 29°C Lo 25°C | Hi 30°C Lo 26°C | Hi 30°C Lo 26°C | Hi 29°C Lo 25°C | Hi 28°C Lo 24°C | Hi 27°C Lo 23°C |
| 14 km/h | 15 km/h | 15 km/h | 14 km/h | 14 km/h | 15 km/h | 16 km/h | 15 km/h | 12 km/h | 11 km/h | 12 km/h | 15 km/h |
| 11 mm | 11 mm | 18 mm | 20 mm | 41 mm | 18 mm | 24 mm | 39 mm | 54 mm | 47 mm | 45 mm | 18 mm |
| 78% | 78% | 77% | 77% | 79% | 79% | 79% | 79% | 79% | 79% | 80% | 79% |
| 43% | 42% | 40% | 39% | 46% | 42% | 46% | 45% | 43% | 43% | 48% | 45% |
| 1017 mb | 1017 mb | 1016 mb | 1015 mb | 1016 mb | 1016 mb | 1016 mb | 1015 mb | 1013 mb | 1013 mb | 1013 mb | 1015 mb |
| 29 | 26 | 27 | 25 | 21 | 24 | 24 | 22 | 18 | 19 | 20 | 28 |
| 2 | 3 | 5 | 5 | 10 | 6 | 7 | 9 | 12 | 12 | 10 | 3 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| 60 | 58 | 65 | 64 | 51 | 59 | 55 | 57 | 58 | 60 | 47 | 53 |
| 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.