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Old 08-27-2014, 12:58 PM
 
3,574 posts, read 3,788,498 times
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Quote:
Originally Posted by Ariete View Post
I can guarantee that won't happen in Scandinavia at least.

Of the 20 last Septembers in Helsinki, 3 have been below average, 5 average, and 12 above average. Very unfavourable odds.
same pattern for gothenburg
61-90 normal period.

2004: 13.9C (+1.2C)
2005: 14.6C (+1.8C)
2006: 17.1C (+4.3C)
2007: 13.2C (+0.5C)
2008: 13.1C (+0.3C)
2009: 14.4C (+1.6C)
2010: 12.7C (-0.1C)
2011: 14.6C (+1.8C)
2012: 13.4C (+0.6C)
2013: 13.2C (+0.4C)

in the last ten years, just one september has been colder than the 1961-1990 average.
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Old 08-27-2014, 01:05 PM
 
Location: Yorkshire, England
5,586 posts, read 10,594,746 times
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Quote:
Originally Posted by kronan123 View Post
same pattern for gothenburg
61-90 normal period.

2004: 13.9C (+1.2C)
2005: 14.6C (+1.8C)
2006: 17.1C (+4.3C)
2007: 13.2C (+0.5C)
2008: 13.1C (+0.3C)
2009: 14.4C (+1.6C)
2010: 12.7C (-0.1C)
2011: 14.6C (+1.8C)
2012: 13.4C (+0.6C)
2013: 13.2C (+0.4C)

in the last ten years, just one september has been colder than the 1961-1990 average.
That 2006 figure is ridiculous! That's warmer even than the 16.8C averaged out over central England that year, which was the warmest September we'd ever had. Our 1981-2010 average (I don't know 1961-90) for September is higher than yours at 14.0C, so I wouldn't have thought you could possibly beat our warmest on record so late in the year, coastal or not.
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Old 08-27-2014, 01:09 PM
 
Location: Top of the South, NZ
22,216 posts, read 21,506,216 times
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Quote:
Originally Posted by Jas182 View Post
Also, tbh Indian summers happen quite often in the south during September and early October, though hardly go above 31c...
What definition of Indian Summer are you using? I go by the American definition, where there is a frost, followed by a return to summer conditions.

The last two Autumns have seen them here, with early frost, followed by a March, that was the warmest month of summer
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Old 08-27-2014, 01:11 PM
 
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^^
yeah, that's one of the most impressive records that gothenburg has imo. it's also the swedish all time record for september.
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Old 08-27-2014, 01:14 PM
B87
 
Location: Surrey/London
11,769 posts, read 10,543,808 times
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Quote:
Originally Posted by Joe90 View Post
What definition of Indian Summer are you using? I go by the American definition, where there is a frost, followed by a return to summer conditions.

The last two Autumns have seen them here, with early frost, followed by a March, that was the warmest month of summer
We don usually get frost until mid-November. When people talk about Indian summers in the UK, they mean sunny 20c+ days in October.
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Old 08-27-2014, 01:17 PM
 
Location: Portsmouth, UK/Swanage, UK
2,173 posts, read 2,567,774 times
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Quote:
Originally Posted by Joe90 View Post
What definition of Indian Summer are you using? I go by the American definition, where there is a frost, followed by a return to summer conditions.

The last two Autumns have seen them here, with early frost, followed by a March, that was the warmest month of summer
I tend to call it an Indian summer when temps are above 23c in September and above 20c in October. We hardly get frosts till mid November here, by then anything above 15c would be amazing, sometimes though Pompy hardly gets any frosts what so ever during the year...
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Old 08-27-2014, 01:18 PM
 
Location: Northville, MI
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Funny to call 30 C a heatwave, especially if its dry heat.
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Old 08-27-2014, 01:19 PM
 
Location: Trondheim, Norway - 63 N
3,593 posts, read 2,676,942 times
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Same for Trondheim.
September, deviations from the 1961-90 normal (Trondheim - Voll), monthly mean, last 16 years:

1998: +2.7C
1999: +4.4C
2000: +2.4C
2001: +1.5C
2002: +1.3C
2003: no data
2004: +1.6C
2005: +1.5C
2006: +3.7C
2007: -0.4C
2008: +1.4C
2009: +1.6C
2010: +0.9C
2011: +2.7C
2012: -0.3C
2013: +2C

Only two years colder than the "normal" and that was very small deviations. Lots of Septembers with large positive deviations from "normal".
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Old 08-27-2014, 01:20 PM
 
Location: Portsmouth, UK/Swanage, UK
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Quote:
Originally Posted by ben86 View Post
That 2006 figure is ridiculous! That's warmer even than the 16.8C averaged out over central England that year, which was the warmest September we'd ever had. Our 1981-2010 average (I don't know 1961-90) for September is higher than yours at 14.0C, so I wouldn't have thought you could possibly beat our warmest on record so late in the year, coastal or not.
Wait we're talking mean temps here right. Cus the average high in Southsea is 19.3 in September, and probs 20 or so if you get into more sheltered spots of the city...
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Old 08-27-2014, 01:24 PM
 
Location: Portsmouth, UK/Swanage, UK
2,173 posts, read 2,567,774 times
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Quote:
Originally Posted by Adi from the Brunswicks View Post
Funny to call 30 C a heatwave, especially if its dry heat.
Dude this is Britain. 30 for some is unbearable, though those people are moany wimps because I like 30c personally! Usually though 30degree heat comes with humidity...
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