Season Rainfall

Summary of season characteristics we need to know for each season regarding the key season’s components and variables such as rainfall and temperature. We provide summary statistics for those variables and specify the functions required to analyze them.

Current/Observed	Description	Short name	Statistics	Formula/Function	Codes	Associated Hazards
Onset Day	Moisture supply ≥ 0.5 ET marks start	OD
Cessation Day	Moisture supply falls below 0.5 ET	CD
Season Length	The difference between the cessation date and the onset date of the rainy season	SL		Difference function (CD - OD)
Rainy Days	A day with rainfall ≥ 1 mm between OD and CD	RD	- Total number of days with rainfall ≥ 1 mm- Day with maximum rainfall- Wet spell			NDWS, NDWLWaterlogging
Rainfall Amount	Available rainfall by considering all RD between OD and CD	RA	- Total rainfall by considering all RD between OD and CD - Rainfall anomalies	- Sum function - Difference function (RA-LRA)
Dry Day	A day with rainfall < 1 mm	DD	Total number of days with rainfall < 1 mm			NDD

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Long-term mean (LTM)

Current/Observed	Description	Short name	Statistics	Formula/Function	Codes	Associated Hazards
Onset Day		LOD
Cessation Day		LCD
Season Length		LSL
Rainfall Amount		LRA

Temperature

Current/Observed	Description	Short name	Statistics	Formula/Function	Codes	Associated Hazards
Average Temperature		Tav		(Tmax + Tmin)/2
Maximum Temperature		Tmax		Average		THI, HI, Tx> ..
Minimum Temperature		Tmin		Average

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Long-term mean (LTM)

Current/Observed	Description	Short name	Statistics	Formula/Function	Codes	Associated Hazards
Average Temperature		Tav
Maximum Temperature		Tmax
Minimum Temperature		Tmin