Successive 4s forecast for here most of next working week, with St Helier offered a 5 on Monday (MetO)

With the unusually warm air thickening the troposphere and thinning the ozone layer today, were the UV levels especially high today or was it too hazy out there?

Since & including 27/3 Reading 3.7/2.0/4.1/4.0/2.2

Chilton 4.0/ 2.5/ 4.4/ 4.0/ 3.0

Disappointing today in the south. Although the air was warmer & thicker, proximity to that boundary meant a lot of cloud in CSEngland with no real heat from the sun directly, although a gentle background radiative hum was apparent.

Some consistency between stations. 

With the unusually warm air thickening the troposphere and thinning the ozone layer today, were the UV levels especially high today or was it too hazy out there?

Southern stations consistently offered a 4 James- with some good bright sunshine here S of Winchester. Never took a look at the satellite images to check the cloud cover however.

Chilton 4.6, reading 4.2

As PAM says, must be at least the high 4s on the South Coast.

Chilton 4.7

Southern stations consistently offered a 4 James- with some good bright sunshine here S of Winchester. Never took a look at the satellite images to check the cloud cover however.

Cheers 

Some impressively strong-feeling sunshine for the time of year yesterday and today, able to counteract an increasingly cold wind to a surprising degree. Around 4 pm, I set out while the sun was in and was battling for warmth in a heavy jacket even as I walked briskly. Yet once the sun came out and stuck around for a bit, I warmed up so much that I had to take the jacket off for a few minutes to vent some heat!

Admittedly, it was a dark jacket - low albedo - but still, it impressed me and that's what counts .

 

Cheers 

Some impressively strong-feeling sunshine for the time of year yesterday and today, able to counteract an increasingly cold wind to a surprising degree. Around 4 pm, I set out while the sun was in and was battling for warmth in a heavy jacket even as I walked briskly. Yet once the sun came out and stuck around for a bit, I warmed up so much that I had to take the jacket off for a few minutes to vent some heat!

Admittedly, it was a dark jacket - low albedo - but still, it impressed me and that's what counts .

Indeed, with Chilton and Reading both passing 4(Reading data missing for 5th). Good compatibility between stations with both registering a 5 on 8th. Full results from both stations to 13th:

            Reading       Chilton

4th          4.2              4.4

5th          ?                 4.7

6th          3.8              4.5

7th          2.8              2.7

8th          5.0              5.0

9th          4.3              4.8

10th        1.7              2.1

11th        3.9              3.8

12th        3.9              3.9

13th          ?               4.2

Chilton 4.8

Reading 4.4

5th consecutive 5+ for Chilton with 5.7 today.

Reading 5.8

Chilton 5.9

Almost on a high!

Reading and Chilton both made 6.6

Actually, Chilton was pretty much there at 12BST with still an hour potentially to increase but there seems to have been a drop about that time. Wonder what it was.

UV7 forecast in Bridport tomorrow.

6s as far as Cumbria and I O Man.

Edit: 7s for other parts of SW Dorset, Sussex and IOW.

UV index here is just moderate. Just planted out 6 different   tomato plants