Herndon, domingo, 9 agosto, 08:17
Nublado. Sensación de 77°. Máxima 90°, mínima 73°.
En septiembre, Herndon, VA tiene una máxima media de 77.7° y una mínima media de 60.7°. Caen unas 4.1 pulgadas de precipitación (9 días de lluvia). El récord de calor es 98.8° (2023) y el de frío 39.6° (1963). Las normales se calculan sobre los últimos 60 años.
| Día | Máxima | Mínima | Prob. lluvia | Récord máx. | Récord mín. |
|---|---|---|---|---|---|
| 1 | 82° | 64.8° | 33% | 96.1° (1973) | 54.7° (1967) |
| 2 | 82.6° | 64.4° | 35% | 95.9° (1980) | 52.7° (2009) |
| 3 | 82.9° | 64.8° | 27% | 97.5° (2023) | 49.6° (1967) |
| 4 | 82.2° | 65.3° | 35% | 98.8° (2023) | 53.1° (2024) |
| 5 | 81.7° | 64.4° | 30% | 98.6° (2023) | 51.4° (1997) |
| 6 | 81.1° | 63.9° | 32% | 98.1° (2023) | 51.4° (2000) |
| 7 | 81.5° | 63.3° | 30% | 93.2° (2016) | 50° (1984) |
| 8 | 80.6° | 63° | 28% | 94.3° (2016) | 50° (2024) |
| 9 | 80.1° | 63° | 28% | 95° (1985) | 47.7° (2024) |
| 10 | 79.9° | 62.8° | 33% | 95.2° (1983) | 50.2° (2017) |
| 11 | 79.7° | 61.9° | 22% | 96.8° (1983) | 49.6° (2017) |
| 12 | 79.3° | 61.7° | 27% | 95.2° (2019) | 45.9° (1967) |
| 13 | 79.5° | 61.5° | 33% | 90.1° (1998) | 49.3° (1967) |
| 14 | 79.3° | 62.1° | 32% | 92.1° (2016) | 46.4° (1975) |
| 15 | 77.7° | 61° | 25% | 92.5° (1970) | 46.6° (1975) |
| 16 | 76.8° | 59.4° | 30% | 94.6° (1991) | 47.3° (2011) |
| 17 | 76.6° | 60.4° | 38% | 95.4° (1991) | 46.4° (1986) |
| 18 | 77.5° | 60.1° | 32% | 91.4° (1978) | 43.5° (1990) |
| 19 | 76.3° | 59.4° | 23% | 90.1° (1983) | 46.9° (1984) |
| 20 | 76.6° | 59° | 18% | 88.7° (2005) | 42.8° (2020) |
| 21 | 77° | 59.7° | 30% | 89.6° (1998) | 42.8° (2020) |
| 22 | 75.7° | 59.5° | 37% | 93° (2010) | 41.4° (2020) |
| 23 | 74.7° | 57.9° | 32% | 93.4° (1970) | 43.5° (1983) |
| 24 | 73.4° | 56.8° | 32% | 94.1° (2010) | 39.6° (1963) |
| 25 | 73.4° | 57.2° | 37% | 91.6° (1970) | 44.1° (1983) |
| 26 | 73.9° | 58.3° | 43% | 90.9° (1970) | 44.4° (2001) |
| 27 | 75° | 58.1° | 40% | 91.6° (1998) | 45.9° (2000) |
| 28 | 73° | 57.7° | 37% | 88.9° (2019) | 42.6° (1989) |
| 29 | 71.1° | 56.3° | 23% | 86.9° (2019) | 46.2° (1978) |
| 30 | 70.5° | 54.9° | 33% | 90° (1986) | 42.8° (1992) |