Weather World
Grayson County, TX Official Site
Grayson County Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 52°F Lo 36°F | Hi 56°F Lo 40°F | Hi 66°F Lo 48°F | Hi 72°F Lo 54°F | Hi 80°F Lo 63°F | Hi 89°F Lo 72°F | Hi 94°F Lo 75°F | Hi 95°F Lo 76°F | Hi 88°F Lo 69°F | Hi 76°F Lo 58°F | Hi 64°F Lo 47°F | Hi 55°F Lo 40°F |
| 10 mph | 10 mph | 11 mph | 11 mph | 9 mph | 8 mph | 8 mph | 7 mph | 7 mph | 9 mph | 9 mph | 9 mph |
| 2.9 in | 2.9 in | 4.4 in | 5.7 in | 8.3 in | 4.3 in | 3.5 in | 2.7 in | 4.2 in | 5.6 in | 3.7 in | 3.3 in |
| 65% | 71% | 70% | 73% | 77% | 71% | 63% | 57% | 63% | 64% | 68% | 69% |
| 32% | 40% | 39% | 40% | 39% | 26% | 24% | 22% | 27% | 28% | 32% | 38% |
| 30.2 in | 30.1 in | 30.0 in | 29.9 in | 29.9 in | 29.9 in | 29.9 in | 29.9 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 26 | 21 | 24 | 23 | 22 | 23 | 25 | 26 | 24 | 26 | 25 | 27 |
| 4 | 6 | 6 | 7 | 9 | 7 | 6 | 5 | 6 | 5 | 5 | 4 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 3 | 3 | 4 | 5 | 6 | 7 | 7 | 7 | 6 | 4 | 3 | 2 |
| 238 | 179 | 197 | 179 | 183 | 239 | 268 | 285 | 244 | 233 | 227 | 212 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 11°C Lo 2°C | Hi 13°C Lo 4°C | Hi 19°C Lo 9°C | Hi 22°C Lo 12°C | Hi 27°C Lo 17°C | Hi 32°C Lo 22°C | Hi 34°C Lo 24°C | Hi 35°C Lo 24°C | Hi 31°C Lo 20°C | Hi 25°C Lo 15°C | Hi 18°C Lo 9°C | Hi 13°C Lo 5°C |
| 15 km/h | 16 km/h | 17 km/h | 17 km/h | 15 km/h | 13 km/h | 12 km/h | 12 km/h | 12 km/h | 14 km/h | 15 km/h | 15 km/h |
| 73 mm | 75 mm | 111 mm | 146 mm | 211 mm | 109 mm | 88 mm | 67 mm | 107 mm | 143 mm | 94 mm | 84 mm |
| 65% | 71% | 70% | 73% | 77% | 71% | 63% | 57% | 63% | 64% | 68% | 69% |
| 32% | 40% | 39% | 40% | 39% | 26% | 24% | 22% | 27% | 28% | 32% | 38% |
| 1021 mb | 1019 mb | 1016 mb | 1013 mb | 1013 mb | 1012 mb | 1014 mb | 1013 mb | 1015 mb | 1016 mb | 1020 mb | 1020 mb |
| 26 | 21 | 24 | 23 | 22 | 23 | 25 | 26 | 24 | 26 | 25 | 27 |
| 4 | 6 | 6 | 7 | 9 | 7 | 6 | 5 | 6 | 5 | 5 | 4 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 3 | 3 | 4 | 5 | 6 | 7 | 7 | 7 | 6 | 4 | 3 | 2 |
| 238 | 179 | 197 | 179 | 183 | 239 | 268 | 285 | 244 | 233 | 227 | 212 |
| 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.