When will London see it's first 80f of the year? (days, prediction)

[B87]

Originally Posted by AJ1013

That'd be record warm wouldn't it?

I predict:

May: 17.2c, 163 hrs
June: 21.6c, 191 hrs
July: 22.7c, 180 hrs
August: 23.1c, 182 hrs
September: 20.3c, 156 hrs

No, record warm for the summer months would be:

May: 21.0c, 310 hrs
Jun: 25.5c, 261 hrs
Jul: 28.2c, 266 hrs (actually 312 hrs, but adjusted to keep in line with other CS measurements).
Aug: 27.0c, 295 hrs
Sep: 22.8c, 209 hrs

You're predicting another cool and cloudy summer?

[AJ1013]

Originally Posted by B87

No, record warm for the summer months would be:

May: 21.0c, 310 hrs
Jun: 25.5c, 261 hrs
Jul: 28.2c, 266 hrs
Aug: 27.0c, 295 hrs
Sep: 22.8c, 209 hrs

You're predicting a cool and cloudy summer?

What is your warmest ever for each of those months?

And I'm predicting a very slightly below average and moderately cloudier than average summer for London, I said June and September would be warmer than average, May and July would be below average, and August would be about average. I do think it will be cloudier than normal outside of September though.

[B87]

Originally Posted by AJ1013

What is your warmest ever for each of those months?

And I'm predicting a slightly below average and moderately cloudier than average summer for London.

Those are the warmest average highs for those months at Heathrow.

[AJ1013]

Originally Posted by B87

Those are the warmest average highs for those months at Heathrow.

I'm impressed, I actually didn't know London has had more than one month with an average high above 80F (I thought July 1976 was the only one)

Did you pair the warmest months with the highest sunshine months? Or are those sunshine totals the actual totals for those specific months.

[Joe90]

Originally Posted by B87

No, record warm for the summer months would be:

May: 21.0c, 310 hrs
Jun: 25.5c, 261 hrs
Jul: 28.2c, 266 hrs (actually 312 hrs, but adjusted to keep in line with other CS measurements).
Aug: 27.0c, 295 hrs
Sep: 22.8c, 209 hrs

You're predicting another cool and cloudy summer?

What was the non adjusted sunshine total for August?

Why is it adjusted? -are the other CS recorders adjusted?

[B87]

Originally Posted by Joe90

What was the non adjusted sunshine total for August?

Why is it adjusted? -are the other CS recorders adjusted?

Sunshine was recorded with KZ from September 2005. Anything after that date has been adjusted to CS values on the Met Office data page. That August was 1995, so is not adjusted.

Eg: July 2006: 312 hrs down to 266 hrs
July 2013: 303 hrs down to 268 hrs
Feb 2008: 138 hrs down to 130 hrs

[B87]

Originally Posted by AJ1013

I'm impressed, I actually didn't know London has had more than one month with an average high above 80F (I thought July 1976 was the only one)

Did you pair the warmest months with the highest sunshine months? Or are those sunshine totals the actual totals for those specific months.

These are the months that have recorded average highs above 80F in London.

July 2006 (82.8)
July 1983 (81.7)
July 2013 (80.6)
August 1995 (80.6)

The following have recorded highs between 79.0-79.9F.

July 1976 (79.9)
August 2003 (79.5)
July 1995 (79.3)
July 1994 (79.0)

The sunshine totals are the totals for those specific months.

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