London weather: Met Office issues rare red pollen warning for the capital as temperatures soar

Hold onto your sun hats, London! Today, April 4, 2025, is shaping up to be the hottest day of the year so far, with temperatures soaring to a sizzling 22°C.

The sun will be shining brightly, making it a perfect day to bask outdoors and enjoy the warmth.​

But before you rush out to soak up the sun from one of London’s parks, there's something important to note. The Met Office has issued a rare red alert for hayfever sufferers across the UK today, warning that the pollen count will be "very high."

This means that tree pollens, especially birch and ash, are in full swing, and those with sensitivities should take necessary precautions.​

With the combination of high temperatures and elevated pollen levels, it's advisable to keep windows closed during peak pollen times, typically early morning and late afternoon. If you're planning to spend time outdoors, consider wearing sunglasses and applying antihistamine eye drops or nasal sprays.

Looking ahead, the upcoming days in London promise delightful spring weather. Saturday, April 5, will be beautiful with plenty of sunshine, reaching a high of 19°C and a low of 6°C.

Sunday, April 6, continues the trend with ample sunshine, a high of 15°C, and a low of 5°C. Monday, April 7, is expected to be delightful, featuring abundant sunshine, a high of 16°C, and a low of 4°C.

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This pattern aligns with the UK's recent dry spell, which is anticipated to continue into April due to a high-pressure system influenced by changes in the Arctic stratosphere. This setup brings a good deal of fine and dry weather, making it an excellent time to enjoy outdoor activities.

However, it's important to note that the pollen count is expected to remain high during this period. Springtime warmth combined with abundant sunshine can lead to increased pollen levels, which may affect those with allergies.