AGROCLIMATIC INFORMATION FOR AGRICULTURAL PLANNING AND OPERATION IN ILOCOS NORTE PARTICULARLY BATAC AND SURROUNDING AREAS FOR THE MONTH OF APRIL

I. AGROCLIMATIC SUMMARY::

Partly cloudy skies is prevalent in the area. Total rainfall amount of 18.0 mm with 1 rainy days (light rains) and a total evaporation of 189.9 mm are the normal values for the month.

Atmospheric and soil condition remains dry hence, good drying condition for agricultural harvest prevails. Normal relative humidity in the morning is 77%. Leaf wetness duration is up to 6 hours only. Daylight duration is 12 hours and 43 minutes with 63% total bright sunshine. This situation gives an amount of 23.5 MJ/m²/day of solar radiation during most days of the month. Westerly and southeasterly winds prevail.

The normal maximum air temperature is 33.9 °C. An extreme temperature of 38.4 °C was recorded on April 15, 1986. Minimum air temperature is 22.7 °C with an extreme coolness of 17.2°C as what was recorded on April 3, 1980.

II. AGROCLIMATIC DATA (AVERAGE)::

Decade	Rainfall	Rainy	Tot	AIR TEMPERATURE		RH	Solar	Wind
(10 Day)	(mm)	days	evap.	Max.	Min.	(%)	Rad.	Speed
			(mm)	(°C)	(°C)		MJ/m2	(kpd)
April
1-10	2.3	0	61.2	33.5	22.0	78	23.0	37.4
11-20	5.1	0	63.5	33.9	22.7	77	23.4	39.6
21-31	10.5	1	65.1	34.3	23.3	77	23.9	40.6

III. TROPICAL CYCLONE

Normal tropical cyclone track is far from the area but there was a tropical cyclone that affected Ilocos Norte during the month of April in year 2003 and 2015.

TC Name	Year & date of occurrence	Rainfall Amount (mm)
TY Amang	April 16-24, 2003	14.0
TS Chedeng	April 4-5, 2015	0

TD - Tropical Depression ( >62 kph)

TS - Tropical Storm (62-88 kph)

STS – Severe Tropical Storm (89-117 kph)

TY - Typhoon (118-220 kph)

STY - Super Typhoon (< 222 kph)