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Tree pollen occurs first, typically from late March to mid-May. Grass (which actually has two peaks) lasts from mid-May until July, and weed pollen covers the end of June to September.
There are four seasons in the year in the UK, but what causes them and how do they affect us?
What weather conditions are typically associated with areas of high and low pressure?
Heading to the beach this summer? The RNLI gives advice on how you and your family can stay safe.
Please note that when changing units, only forecasts and maps will be affected.