Monthly Archives: July 2015

Dry and warm weather in the second week of August

Advisory

Singapore, 31 July 2015 – Southwest Monsoon conditions are forecast to prevail during the next fortnight with low level winds blowing predominantly from southeast or south-southwest.

2.   In the first fortnight of August 2015, short-duration thundery showers due to strong solar heating of land areas are likely on 4 to 6 days, mostly in the late morning and early afternoon. In addition, thundery showers with gusty winds due to Sumatra squalls can be expected on 2 or 3 days in the morning. Most of the thundery showers are expected in the first week of August 2015 while dry and warm conditions with maximum temperatures of around 34 degrees Celsius can be expected in the latter half of the fortnight. In particular, for the Jubilee weekend, short-duration thundery showers are forecast in the late morning and early afternoon.

3.   Slightly hazy conditions can be expected on a few days, in particular in the early morning, due to the accumulation of particulate matter under light wind conditions.

4.   The rainfall for the first fortnight of August 2015 is expected to be near-normal.

Review of 1 – 30 July 2015

5.   Southwest-Monsoon conditions prevailed in July 2015. During the period, the low level winds blew from the southeast or south-southwest.

6.   Singapore experienced warm conditions in July 2015 where maximum day-time temperatures of between 34 and 35 degrees Celsius were recorded on some days. The daily minimum temperature recorded during the month ranged from 22 to 28 degrees Celsius. Thundery showers fell over the island on several days mostly in the late morning and early afternoon. In addition, thundery showers with gusty winds affected Singapore on a few mornings due to the passage of a Sumatra squall. The highest daily total rainfall recorded for the month was 71mm on 17 July 2015 around Lim Chu Kang.

7.   In July 2015, most parts of Singapore received below-average rainfall. The lowest rainfall of 35mm and 55mm (65 to 80% below average) was recorded over the southwestern part of Singapore around Jurong. Rainfall was highest over the northwestern part of the island around Woodlands and Lim Chu Kang respectively, where 164mm to 185mm (0 to 25% above average) of rain was recorded.

STATISTICS FOR AUGUST since 1869 (CLIMATE STATION)

Average rainfall for the month — 175.4 mm
Highest rainfall ever recorded — 526.8 mm (1878)
Lowest rainfall ever recorded — 18 mm (1888)
Average number of rain days — 14
Average daily maximum temperature — 30.9 degrees Celsius
Average daily minimum temperature — 24.5 degrees Celsius

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Below-normal rainfall forecast for the month

Advisory

Singapore, 15 July 2015 – Southwest Monsoon conditions are forecast to prevail during the next fortnight, with surface winds blowing predominately from the southeast or southwest.

2.     In the second fortnight of July 2015, short-duration thundery showers due to strong solar heating of land areas are forecast on 4 to 6 days in the late morning and afternoon. Daily maximum temperatures of up to about 33 degrees Celsius are forecast on some days during this period. In addition, thundery showers with gusty winds due to Sumatra squalls are likely on 1 to 2 days in the pre-dawn and morning. Slightly hazy conditions can also be expected on a few days, in particular in the early morning, due to the accumulation of particulate matter under light wind conditions.

3.    Rainfall for July 2015 is expected to be below-normal.

Review of 1 – 14 July 2015

4.    Southwest Monsoon conditions prevailed during the first fortnight of July 2015, with the surface winds blowing predominantly from the south-southeast or southwest.

5.    In the first fortnight of July 2015, there were a few warm days with the daily maximum temperature reaching up to 34.6 degrees Celsius, as well as some wet days where the daily minimum temperatures fell to between 22 and 23 degree Celsius. On several days in the second week of July 2015, Singapore experienced thundery showers with gusty winds in the morning due to the passage of Sumatra squalls. On 10 July 2015, Singapore was briefly affected by slight haze due to a change in the prevailing winds to blow from the southwest which could have brought in some smoke haze from fires in the nearby region.

6.    For the first half of July 2015, the southern and western parts of Singapore received below average rainfall. The highest rainfall of 110 mm and 130 mm (50% to 75% above average) were recorded over the central and eastern parts of the island around Lower Peirce Reservoir and Changi respectively. The lowest rainfall of 25 mm to 45 mm (40% to 65% below average) was recorded over the western parts of Singapore around Jurong.

STATISTICS FOR JULY since 1869 (CLIMATE STATION)

Average rainfall for the month — 158.6 mm
Highest rainfall ever recorded — 527.3 mm (1890)
Lowest rainfall ever recorded — 18.6 mm (1997)
Average number of rain days — 13
Average daily maximum temperature — 30.9 degrees Celsius
Average daily minimum temperature — 24.6 degrees Celsius

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Expected few mornings with slight haze and Sumatra squalls

Advisory

Singapore, 1 July 2015 – Southwest Monsoon conditions are forecast to prevail during the next fortnight with low level winds blowing predominately from southeast or south-southwest.

2.     In the first half of July 2015, several warm days with maximum temperatures around 34 degrees Celsius can be expected in the afternoon. Short-duration thundery showers due to strong solar heating of land areas are likely on 3 to 5 days, mostly in the late morning and early afternoon. In addition, thundery showers with gusty winds due to Sumatra squalls can be expected on 1 or 2 days in the morning.

3.     Slightly hazy conditions can be expected on a few days, in particular in the early morning, due to the accumulation of particulate matter under light wind conditions.

4.     Based on long-term statistics, July has the lowest average monthly rainfall in the year. The rainfall for the first fortnight of July 2015 is likely to be below-normal.

Review of 1 – 30 June 2015

5.     Southwest-Monsoon conditions prevailed in June 2015. During the period, the low level winds were blown from the southeast or south-southwest.

6.     Dry and warm conditions were experienced on most days in June 2015. There were thundery showers over the island on several days in the late morning and early afternoon, and the highest daily total rainfall recorded for the month was 69mm on 16 June 2015 in the Jurong area.

7.     In June 2015, most parts of Singapore received below-average rainfall. The highest rainfall of 160mm and 191mm (0 to 20% above average) was recorded over the western part of the island around Jurong. Rainfall was lowest over the central and eastern parts of Singapore around Whampoa and Marine Parade respectively, where 25mm to 49mm (70 to 85% below average) of rain was recorded.

STATISTICS FOR JULY since 1869 (CLIMATE STATION)

Average rainfall for the month — 158.6 mm
Highest rainfall ever recorded — 527.3 mm (1890)
Lowest rainfall ever recorded — 18.6 mm (1997)
Average number of rain days — 13
Average daily maximum temperature — 30.9 degrees Celsius
Average daily minimum temperature — 24.6 degrees Celsius

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