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Averages\Extremes for the month of September 2009
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Average temperature = 11.5°C
Average humidity = 86%
Average dewpoint = 8.9°C
Average barometer = 1017.8 mb
Average windspeed = 4.0 km/h
Average gustspeed = 6.5 km/h
Average direction = 349° ( N )
Rainfall for month = 121.0 mm
Rainfall for year = 920.2 mm
Maximum rain per minute = 1.4 mm on day 24 at time 15:45
Maximum temperature = 21.8°C on day 16 at time 14:31
Minimum temperature = -2.2°C on day 06 at time 07:07
Maximum humidity = 100% on day 29 at time 08:59
Minimum humidity = 33% on day 06 at time 14:35
Maximum pressure = 1034.9 mb on day 09 at time 09:42
Minimum pressure = 996.9 mb on day 30 at time 16:15
Maximum windspeed = 29.6 kmh from 00°( N ) on day 28 at time 13:44
Maximum gust speed = 40.7 km/h from 023°(NNE) on day 28 at time 13:43
Maximum heat index = 26.2°C on day 08 at time 16:30
Avg daily max temp :18.0°C
Avg daily min temp :5.7°C
Growing degrees days :123.8 GDD
Total windrun = 2834.0km
Only a 0.3°C difference in the average temperature from August to September, wow.
But i would say September will be more on par with the years previous september, so it evened it self out you could say.
Can someone check what last years Septembers average temperature (around the Waikato) was so we can double check.
Thanks
Mean temperature here of 13.7°C, quite similar to August but slightly higher. 82mm rain total with 72mm of this falling in the last 8 days of the month.
September 2009 Summary
Henderson, Auckland. S36.86962 E174.62065 41m ASL
Maxiumum Temperature: 23.3° Sunday 13-September-09
Lowest Maximum: 13.9° Saturday 05-September-09
Minimum Temperature: 1.4° Sunday 06-September-09
Total Rainfall: 114.0 mm
Days with Rain: 12 out of 30 days
Most Rain: 21.2 mm Wednesday 23-September-09
Highest Pressure: 1032.6 mb Wednesday 09-September-09
Lowest Pressure: 995.9 mb Friday 25-September-09
It should be noted that 4 of the 5 places with largest sunshine anomalies are new EWS sites. How much of that is due to better site capture of available sunshine (as opposed to some inconsistency with previous Campbell-Stokes recorders) is moot.