Harpenden (Hertfordshire) weather

Headline:

Often murky early but some warm sunny spells later.

Today:

Any mist and fog will quickly clear to reveal warm sunny spells. Staying dry in the afternoon although a few isolated showers will develop in places. Light winds. Maximum temperature 22 °C.

Tonight:

Showers dying out in the evening and low cloud moving back inland, extensive with poor visibility along coasts but a risk of fog in any clear spells in the west. Minimum temperature 10 °C.

Saturday:

Low cloud and fog dissipating quickly, followed by a scattering of showers spreading inland from the North Sea. Showers heavy and perhaps thundery in places, especially in East Anglia. Maximum temperature 23 °C.

Outlook for Sunday to Tuesday:

Dry, settled at first, with warm sunny spells by day but variable cloud at night. Cooler along coasts. Sunny spells and scattered showers on Tuesday, perhaps heavy in places.

Updated: 05:00 (UTC+1) on Fri 17 May 2024

There is a lot of uncertainty in this period, even at the start when the UK will be in-between low pressure over the near continent trying to keep things unsettled and potentially thundery; high pressure to the west or southwest which would settle things down; and finally low pressure to the north or northwest which may being a more climatological split in conditions between the south and north. Overall though, one way or another, it looks like remaining fairly unsettled across much of the UK, with further rain, showers or even thunderstorms in places, though there will be some sunshine between times, the best of this possibly in southwestern parts. Both rainfall amounts and temperatures are likely to be a little above average, but some large spatial differences are likely.

Updated: 15:00 (UTC+1) on Thu 16 May 2024

There is nothing to suggest that conditions will be massively different to climatology at the end of the current month and though the first half of June. That said, both temperatures and rainfall are more-likely to be a little above average overall, with a fairly mixed bag seemingly most probable, with further rain or showers (possibly heavy/thundery at times) but also some spells of warm sunshine when it's not raining.

Updated: 16:00 (UTC+1) on Thu 16 May 2024