Improving the Forecasting Accuracy Based on the Lunar Calendar in Modeling Rainfall Levels Using the Bi-LSTM Method through the Grid Search Approach

Table 2

Monthly rainfall data (mm) based on the Gregorian calendar.

Year	Gregorian month
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2000	—	—	—	449	339	295	376	248	123	222	36	99
2001	219	337	118	581	699	498	368	282	134	70	52	117
2002	376	439	76	635	659	337	339	31	152	186	81	23
2003	47	217	278	138	582	247	266	165	21	0	205	247
2004	291	264	373	292	513	270	355	241	40	74	155	239
2005	188	468	684	417	163	124	163	140	140	207	203	194
2006	264	283	692	446	161	309	132	41	14	6	21	102
2007	160	554	401	395	386	114	7	134	62	167	236	584
2008	311	315	515	516	406	155	63	3	74	160	224	473
2009	254	605	535	385	222	389	128	87	15	64	358	232
2010	417	523	475	84	291	255	138	306	375	427	286	291
2011	389	265	225	219	175	140	36	8	58	284	394	252
2012	384	348	240	318	144	64	41	12	122	260	366	423
2013	851	338	405	344	494	123	275	131	70.1	198.6	259	501.6
2014	1134	623.8	266.7	403.8	219.9	199.1	344.1	249.8	33.6	94.2	548.3	445.7
2015	284.2	345.4	335.7	196.3	148	14.8	0	0	18.8	50.1	457.7	409
2016	272.5	581.7	553.2	461.2	231.2	201.7	252.6	82.6	365.9	386.7	309.6	142.5
2017	293	688.5	283.7	400.8	225.9	130.8	89.1	49.3	33.7	367.4	420.8	320.7
2018	349.1	679.5	448	298.8	140	160.4	25	20.5	161.7	162.4	390.1	251.7
2019	416.3	467.9	234.8	471	207.4	0	51.4	34.8	13.8	196.2	183.8	328.9
2020	421.3	537.1	511.8	344.2	407.6	96.3	95.1	62	100.4	292.6	165.7	343.9
2021	392	687.1	235.4	382.2	155.3	289.6	74.3	189.7	211.6	327	343.8	446
2022	188.2	250	255.3	479.6	242.3	356.3	143.4	278.6	250.7	505.3	299.2	428.7