My August

Temperature: With a mean temperature for the month of 9.2C, this August was the the warmest I've recorded. The warmest days were the 25th and 29th with 21C, the second warmed August days I've recorded. My record is 23.8C on the 12th August 2002. Coldest temperature was -1.7C on the 6th. The coldest August temperature I've recorded is -4.9C in 3rd August 2000 & 16th Aug 2001. There were 16 days where the temperature was at or over 15C, my August average is 6, there were 2 days where the temperature was at or above 20C which is a new record, the only other years where August has reached 20C or above were 2002 and 2006 with 1 day each. My 10 year average is therefore less than 1! There were 5 days where the minimum temperature was at or below 0, my average is 7. August 2000 holds my record for 17 days where the minimum temperature was at or below 0 and 2005 the minimum with just 1.

Wind: (Records from 2001) The monthly wind run of 4634km is 106% of my August average of 4375km and the 4th windiest August I've recorded. August 2004 the windiest with 5654km, 129% of average. The 19th recorded just 10km of wind run, the lowest wind run recorded for an August day. Highest gust was 57km/h on the 28th from the nor'west and 31st from the south.

Rainfall: August had 52.0mm of rain over 9 days, 62% of the average of 84mm over 12 days. The driest was 2005 with 15.4mm over 7 days, the wettest, 2004 with 172.4mm over 17 days. 19mm fell on the 31st, the wettest day of the month.

Barometer: (Records from 2006) The average pressure for the month was close to the average of 1010.3 hPa with 1011.7 hPa. The lowest pressure was recorded on the 23rd, 975.8 hPa. The lowest minimum pressure for August I've recorded. The highest pressure was 1028.4, the lowest maximum for August. An impressive 32hPa drop in pressure in 24 hours was recorded on the 30th with a deep low passing to the south of the country.

August 2009 Summary
Temperature
Mean 9.2 C
Mean Maximum 14.5 C
Mean Minimum 4.6 C
Maximum High 21.0 C (25th and 29th)
Maximum Low 10.4 C (25th)
Minimum High 8.1 C (15th)
Minimum Low -1.7 C (6th)
Wind Speed and Direction
Maximum Gust 57 km/h (28th and 31st)
Mean 6.4 km/h
Wind Run 4634 km
Max Daily Windrun 297 km (22nd)
Prevailing Direction East Nth East
Barometer
Maximum 1028.4 hPa (7th)
Minimum 975.8 hPa (22nd)
Mean 1011.7 hPa
Max Daily Change -32.0 hPa (30th)
Rainfall
Days with Measured Rainfall (Greater than 0.2mm) 9
Max Daily Rainfall 19.0 mm (31st)
Monthly Rainfall 52.0 mm
Humidity
Maximum 90 % (Several Days)
Minimum 27 % (29th)

August Daily Observations
Temperature Wind Rainfall Barometer
Date Min Max Mean Mean
(Km/h)
Gust
(Km/h)
Run (km) Prevailing Dir 10 Minute Max (mm) Total (mm) Min (hPa) Max (hPa) Change (hPa)
1 2.1 16.7 8.4 1.6 19 37 East Nth East 0 0 998.9 1006.4 +7.5
Cloud becoming thinner during the day and clearing in the evening. Mostly sunny afternoon with light NE winds.
2 0.5 15.1 6.8 4.3 38 98 East Nth East 0 0 997.6 1007.0 -9.4
Overcast with NE winds turning nor'west in the afternoon and light southerly in the evening.
3 -1.5 13.6 6.0 4.6 26 106 East Nth East 0 0 1005.2 1012.8 +7.6
Morning frost. Sunny with high cloud increasing late afternoon, cool NE winds.
4 5.1 17.5 10.8 7.5 56 174 East Nth East 0 0 999.9 1011.9 +12.0
Cloud breaking early afternoon with mild northerly winds. A southerly change in the evening with a few spots of rain.
5 1.9 16.0 7.5 3.7 40 84 East Nth East 0 0 1011.2 1025.2 +14.0
Some broken high cloud but mostly sunny. Light NE winds with a southerly change at night.
6 -1.7 11.8 5.0 4.6 24 106 East Nth East 0 0 1025.0 1027.8 -2.8
Morning frost. Some high cloud but sunny with cool NE winds
7 -0.5 14.6 6.8 6.1 33 140 East Nth East 0 0 1025.0 1028.4 -3.4
Morning frost. Sunny with some high cloud in the afternoon, NE wind.
8 7.4 12.6 9.4 11.6 36 268 East Nth East 0 0 1022.3 1025.0 -2.7
Sunny with some high cloud in the afternoon, fresh NE wind.
9 0.5 14.2 6.9 5.9 28 137 East Nth East 0 0 1024.7 1027.5 +2.8
Morning fog clearing mid morning. Sunny with some high cloud, NE wind
10 5.4 12.5 9.0 10.3 36 237 East Nth East 0 0 1026.1 1027.7 -1.6
Mostly cloudy with a cool NE wind.
11 3.5 16.2 9.8 3.5 20 80 East Nth East 0 0 1022.7 1027.4 -4.7
Mostly overcast with high cloud. Light NE winds.
12 4.1 10.8 7.6 6.0 26 138 East Nth East 0.2 1.0 1022.5 1025.2 +2.7
First recorded rain in 18 days. Overcast with low cloud, southerly winds, evening showers.
13 6.8 8.9 7.6 4.9 20 113 West Sth West 0.8 15.2 1024.7 1028.1 +3.4
Rain in the morning, showers in the afternoon. Southerly winds turning NE late afternoon.
14 7.3 9.8 8.1 7.7 25 176 East Nth East 0 0 1014.3 1025.8 -11.5
Overcast with some drizzle at times, cool NE wind.
15 7.2 8.1 7.5 4.4 21 101 West Sth West 0.4 3.0 1002.4 1014.0 -11.6
Morning fog. Overcast with low cloud and showers from late morning. Light southerly winds.
16 6.9 8.9 7.7 6.0 25 139 West Sth West 0.2 3.0 1002.4 1009.9 +7.5
Mist, low cloud and drizzle. Southerly winds.
17 6.7 15.3 9.4 6.0 21 137 East Nth East 0.2 2.0 1004.2 1009.8 -5.6
Early drizzle. Mostly cloudy with some sunny breaks around midday. Southerly winds turning NE early afternoon.
18 5.6 8.8 7.4 7.6 37 177 East Nth East 0.8 3.8 1001.8 1016.0 +14.2
Overcast with NE winds turning southerly late morning with a period of rain from mid afternoon.
19 -0.9 15.6 6.7 0.4 12 10 North Nth West 0.2 0.2 1015.9 1019.8 +3.9
Morning frost. Clear and sunny with light breezes, some high cloud late afternoon.
20 -0.9 12.5 6.4 5.5 29 128 East Nth East 0 0 1016.3 1019.8 -3.5
Morning frost. Sunny with a little cloud at times. Cool NE wind.
21 5.3 12.5 8.9 7.5 29 173 East Nth East 0 0 1018.4 1021.3 +2.9
Cloud breaking after midday to a mostly sunny afternoon, cool NE wind.
22 8.4 12.3 9.5 12.8 35 297 East Nth East 0 0 1011.9 1019.6 -7.7
Low cloud in the morning, lifting and breaking in the afternoon, frash NE winds.
23 8.5 15.9 11.7 4.2 24 98 East Nth East 0 0 1009.4 1014.7 +5.3
Overcast with a mild afternoon. Light winds tending NE.
24 5.7 16.2 10.7 5.2 25 121 East Nth East 0 0 1009.7 1016.7 -7.0
Early light shower. Morning cloud clearing to a sunny afternoon with light winds.
25 10.4 21.0 14.4 10.6 35 244 East Nth East 1.2 4.0 986.9 1009.6 -22.7
Sunny with some cloud. NE winds turning nor'west for a time giving the highest temperature since the 16th May. Showers in the evening.
26 9.1 18.8 13.6 11.0 54 252 North Nth West 0.2 0.2 980.2 996.2 +16.0
Early showers clearing before dawn. Mild nor'west winds, gusty for a time around midday.
27 4.2 17.0 11.5 6.3 46 146 West Nth West 0 0 990.1 1004.3 +14.2
Some high cloud but mostly sunny with nor'west winds, gusty at times in the afternoon.
28 4.1 19.3 12.4 9.6 57 220 North Nth West 0 0 999.5 1005.5 -6.0
Some high cloud but mostly sunny with gusty nor'west winds.
29 5.4 21.0 12.4 3.6 37 83 North Nth West 0 0 1003.5 1011.0 +7.5
Some high cloud but sunny and mild. Mostly light north to nor'west winds.
30 8.4 18.8 13.3 9.4 40 216 East Nth East 0 0 977.4 1009.4 -32.0
Cloudy with north to NE winds.
31 7.4 16.8 11.3 7.8 57 181 East Nth East 2.4 19.0 975.8 999.0 +23.2
Early southerly change with rain and strong winds. Clearing and winds turning Nor'west in the afternoon and NE in the evening.
August 2009 Temperature Graph August 2009 Wind Dir Graph August 2009 Wind Dir % Graph August 2009 Wind Speed Graph JAugust 2009 Rainfall Graph August 2009 Barograph August 2009 Humidity Graph