Weather in Herndon, August 21
Weather Forecast for August 21 in Herndon, Virginia - temperature, wind, atmospheric pressure, humidity and precipitations. Detailed hourly weather chart.
August 21, 2024
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August 21, 2023
| Atmospheric conditions and temperature °F | RealFeel °F | Atmospheric pressure inHg | Wind speed mph | Humidity |
| Night | +73° | +73° | 29.7 | 2.5 | 63% |
| Morning | +66° | +66° | 29.7 | 2.7 | 75% |
| Day | +88° | +88° | 29.7 | 6.5 | 37% |
| Evening | +88° | +90° | 29.6 | 6 | 45% |
Bio-meteorological forecast
- Meteorological sensitivity index
- 1
- Weather situation is generally favorable to meteosensitive people.
- Geomagnetic conditions
- 1
- Weak solar activity may affect some highly sensitive people.
- Influence of solar activity
- 2
- High risk of harm from unprotected sun exposure for people with sensitive skin types.
Hourly forecast for 21.08.2023
August 21, 2022
| Atmospheric conditions and temperature °F | RealFeel °F | Atmospheric pressure inHg | Wind speed mph | Humidity |
| Night | +73° | +75° | 29.7 | 4.5 | 82% |
| Morning | +70° | +72° | 29.7 | 5.4 | 97% |
| Day | +79° | +79° | 29.7 | 8.5 | 67% |
| Evening | +73° | +75° | 29.6 | 5.1 | 82% |
Bio-meteorological forecast
- Meteorological sensitivity index
- 4
- Strong reactions to the weather are possible by meteosensitive people.
- Geomagnetic conditions
- 3
- High probability that strong solar activity will affect meteosensitive people.
- Influence of solar activity
- 2
- High risk of harm from unprotected sun exposure for people with sensitive skin types.
Hourly forecast for 21.08.2022
August 21, 2021
| Atmospheric conditions and temperature °F | RealFeel °F | Atmospheric pressure inHg | Wind speed mph | Humidity |
| Night | +72° | +73° | 29.5 | 0.9 | 97% |
| Morning | +70° | +72° | 29.5 | 0.9 | 98% |
| Day | +86° | +90° | 29.5 | 3.8 | 60% |
| Evening | +82° | +93° | 29.5 | 3.6 | 84% |
Bio-meteorological forecast
- Meteorological sensitivity index
- 3
- Meteosensitive people are likely to experience weather-related symptoms.
- Geomagnetic conditions
- 2
- Solar activity may affect some sensitive people.
- Influence of solar activity
- 3
- High risk of harm from unprotected sun exposure due to UV radiation.
Hourly forecast for 21.08.2021
Weather in large and nearby cities
Minimum and maximum
world's temperature today
world's temperature today
Argentina
El Calafate
El Calafate
- day
- +36°F
- night
- +12°F
Oman
Ibri
Ibri
- day
- +120°F
- night
- +86°F
Temperature units
°F°C
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