The pollen symbol shows the level of pollen in the air. If you have a condition that puts you at risk from higher levels of pollution, please see our advice. This means that there may be areas in the region with higher or lower levels of pollution than the average. The data shows average pollution levels for regions of the country. This is taken from 'Daily Air Quality Index' defined by Defra, which is shows average concentration of pollution over a period of time. The air pollution symbol shows the level of air pollution from pollutants such as sulphur dioxide, nitrogen oxides and particulate matter. This means that you may see this moment at a slightly different time from the forecast. These equations come from the Global Monitoring Laboratory. We use mathematical equations to work out the time of sunrise and sunset. atmospheric composition, temperature or pressure.whether there is something blocking the view of the horizon.
how high or low the observer is, compared to sea level. We do not use observational data because these results can be affected by: This would be when looking at it from sea level with nothing in the way and with perfect conditions. Sunrise or sunset is the moment when the top of the sun’s orb is level with the horizon. This means that the temperature can be different at other times between those shown. The hourly temperatures are the forecast temperatures at those exact times. This is because it is the highest temperature forecasted to be reached that day. Sometimes the highest temperature for the day will be higher than the temperatures shown in the table. Day is from 9am to 9pm and night is from 9pm to 9am. These are the forecasted maximum (highest) temperature for the day and the forecasted minimum (lowest) temperature at night. Shirt, sunscreen and hat are essential.Īvoid being outside during midday hours. Seek shade during midday hours, cover up and wear sunscreen.Īvoid being outside or seek shade from 11am to 3pm. Take care during midday hours and do not spend too much time in the sun unprotected. We have included advice about what you need to do to stay safe in the sun for each category. The index is split into categories (Low, Moderate, High, Very High and Extreme). It shows the strength of the sun's ultraviolet (UV) radiation. This is an index, developed by the World Health Organisation, called the 'Solar UV Index'. The higher the percentage of humidity, the wetter it will feel outside. If there is a lot of water vapour, the humidity will be high. Humidity is the amount of water vapor in the air. Visibility measures the distance at which an object can be clearly seen. Strong winds are shown in bold and represent speeds of 25 knots (or 29 miles per hour) or above. This value represents the highest wind speed that you should encounter at that time, as the winds peak, and then lull again. NNW would indicate a wind blowing from the north northwest. The arrow shows the direction that the wind is blowing, and the letter represents the direction the wind is blowing from (on a standard 16-point compass rose).įor example, an arrow pointing upwards indicates a wind blowing from the south to the north, along with the letter S to indicate that it is a southerly wind. the mean wind speed you may encounter (in reality the wind will strengthen and lull constantly above and below this value). The speed represents the average wind speed expected at that time, i.e. The number in the coloured bars represents the air temperature in the units selected in Settings (Celsius or Fahrenheit) Feels likeįeels like temperature takes into account wind speed and humidity to give a more representative indication of how the temperature will feel. 
Weather symbolsįor example, a 70% chance of rain represents a 7 in 10 chance that precipitation will fall at some point during that period.Ĭhance of precipitation represents how likely it is that rain (or other precipitation: sleet, snow, hail, drizzle etc.) will fall from the sky at a certain time. If there is a ‘Heavy rain’ symbol at 11:00am on the same day, we expect it will start raining between 10:00am and 11:00am, and it will be raining at 11:00am. So, for example, a ‘Sunny day’ symbol at 10:00am means that we expect there to be sun at 10:00am. The time displayed in the table shows the forecast data for that specific moment in time, on the hour. We provide a long-range 28-day forecast for the UK as a whole, which you can find underneath the forecast table, below the map and flood warnings.
The forecast table gives you an overview of the weather forecast at a specific location for the next seven days.
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