After a relatively wet May, we may begin to experience the effects of El Nino in June with potentially drier weather to start the Southwest Monsoon

[u/Fun_Advance_5438]

Warning: Long post ahead.

Tldr: Intermonsoon conditions have prevailed in Singapore for the entire month of May and is gradually expected to give way to the more dreaded Southwest Monsoon. The MJO has become active again and is currently in the suppression phase which will result in lower rainfall until around Jun 20. An El Nino is expected to form this month at a 72% chance right now. The odds of a super El Nino has also increased to 37% in November, December and January which tends to be the peak for most El Nino events. At this time, there is a 30% chance of a strong El Nino, 22% for a moderate one and a 9% chance for a weak one. As a result, we may experience dry and warm weather this southwest monsoon. For June, I am anticipating below normal to near average rainfall (-60% to 10%).

Let us look at May. May has improved yet again compared to April with an anomaly of 24.83%, which puts us at near average. Most stations reached above normal rainfall while some are still struggling to reach normal rainfall. We have received 248.4 mm against the normal 209 mm.

North: 230.2 mm (13.08%)

South: 259.5 mm (40.06%)

East: 240 mm (33.53%)

West:260.6 mm (16.09%)

Central: 252.9 mm (23%)

(Disclaimer: This is based on what I found in this image here **and made some estimates using the ranges provided here. So there may be a few inaccuracies. Also for simplicity sake, all the rainfalls normals would be based on the middle of the range given. So 110,130,150,170,190 and so on(except for Changi where exact details have been provided by MSS since it is the climate station))

Classification: Well-below average (-100% to -70%), Below Average: (-70% to -30%), Average (-30% to 50%), Above Average: (50% to 100%), Well-above Average (100% and above)**

NOTE: Brand new weather station names have been issued by MSS stating that from now on, the weather station names will be linked to the relevant street names. Additionally, I have consolidated all the stations into the 5 regions listed above, compared to the 9 earlier. This is for my current project which I am working on right now. Also there are now 81 weather stations in total.

1	Artillery Avenue	South	170	313.2	84.24
2	MacRitchie Reservoir	Central	210	370.4	82.26
3	Kim Chuan Road	East	210	377.7	79.86
4	Margaret Drive	South	190	334.1	75.84
5	Alexandra Road	South	190	332.4	74.95
6	Hougang Avenue 1	East	230	393.9	71.26
7	Kent Ridge Road	South	190	322.2	69.58
8	Bedok Reservoir	East	170	286.2	68.35
9	Henderson Road	South	190	316.8	66.74
10	South Buona Vista Road	South	190	316	66.32
11	Pasir Ris Street 51	East	170	282	65.88
12	Toa Payoh North	Central	210	335.2	64.94
13	Compassvale Road	North	210	343.4	63.52
14	Yio Chu Kang Road	East	210	336.1	60.05
15	Bishan Street 13	Central	210	332.5	58.33
16	Jurong Pier Road	West	230	361	56.96
17	Woodlands Centre Road	North	210	325.3	54.90
18	Nicoll Highway	South	170	262.4	54.35
19	Tanjong Rhu	East	170	259.5	52.65
20	Paya Lebar Meteorological Station	East	230	350.5	52.39
21	Tampines Avenue 5	East	170	246	49.53
22	Punggol Central	North	210	314	49.52
23	Pasir Panjang Road	South	210	313.3	49.19
24	Changi East Close	East	170	252.2	48.35
25	Malan Road	South	190	277.8	46.21
26	Coronation Walk	Central	210	304.6	45.05
27	Ang Mo Kio Avenue 10	Central	210	302.1	43.86
28	Jurong West Street 73	West	250	356.6	42.64
29	Somerset Road	Central	210	292.6	39.33
30	Towner Road	Central	210	288.4	37.33
31	West Coast Road	South	210	285.4	35.90
32	Poole Road	East	170	230.4	35.53
33	Banyan Road	West	230	310.6	35.04
34	Botanic Gardens	Central	210	282.8	34.67
35	Tengeh Reservoir	West	230	307	33.48
36	Scotts Road	Central	210	279.2	32.95
37	Tuas South Avenue 3	West	230	300.4	30.61
38	Bukit Timah Road	Central	210	269.6	28.38
39	Sunset Way (ENV)	West	230	290.8	26.43
40	Kranji Road	North	210	263.5	25.48
41	Nanyang Avenue	West	230	287.6	25.04
42	Marina Barrage	South	170	211.2	24.24
43	Choa Chu Kang Avenue 4	West	230	282.2	22.70
44	Woodlands Drive 62	North	210	250.6	19.33
45	Sungei Kadut Street 3	North	210	250	19.05
46	Old Choa Chu Kang Road	West	230	273.6	18.96
47	Tengah Meteorological Station	West	230	266.4	15.83
48	Woodlands Avenue 9	North	210	240.2	14.38
49	Pasir Panjang Terminal	South	210	237.2	12.95
50	Bukit Batok Street 34	West	230	251.4	9.30
51	Changi Meteorological Station	East	170	185.4	9.06
52	Seletar Reservoir	North	230	246.6	7.22
53	Sengkang East Avenue	North	210	115.6	6.65
54	Semakau Island	South	190	200.6	5.58
55	Pasir Ris Walk	East	170	92	4.85
56	Lim Chu Kang Road	North	210	219.4	4.48
57	Lower Pierce Reservoir	Central	230	239	3.91
58	Yishun Walk	North	210	218.2	3.90
59	Clementi Road	West	230	236.8	2.96
60	Jurong West Street 42	West	250	256.4	2.56
61	Bukit Panjang Road	West	230	234.6	2.00
62	Kranji Reservoir	North	210	212.6	1.24
63	Old Toh Tuck Road	West	230	232.8	1.22
64	Fernvale Lane	North	210	108.4	0.01
65	Jalan Noordin	East	210	209.6	-0.19
66	Mandal Lake Road	North	230	229.1	-0.39
67	Yishun Ring Road	North	210	187.9	-10.52
68	Upper Pierce Reservoir	Central	230	203.8	-11.39
69	Ang Mo Kio Avenue 5	Central	230	201.8	-12.26
70	Jalan Mata Ayer	North	230	199.9	-13.09
71	Seletar Meteorological Station	North	210	182.4	-13.14
72	Lorong Kismis	West	230	100.2	-15.59
73	Marine Parade Road	East	170	139.8	-17.76
74	Seraya Road	East	170	71.2	-18.85
75	Murnane Service Reservoir	Central	230	182.2	-20.78
76	East Coast Park	East	170	128.2	-24.59
77	Coronation Road	Central	210	84.2	-26.89
78	Holland Grove Road	South	230	87	-31.02
79	Hillcrest Road	Central	210	78.6	-31.75
80	Clementi Stadium	South	230	83.2	-34.04
81	Taman Jurong Greens	West	250	82	-36.45
-	Average	-	209.01		24.83

Now, as we look at Jun 2026, MSS has yet to release any stats as at 5 pm but so far, looking at the 4 day forecast, we can see a lot of fair and warm weather prevailing here and this is in line with the current MJO which is strong in Phase 7 and 8 which is in the suppressive phase for Singapore. Additionally the El Nino is predicted to set some time in the middle to end of this month. However, like we saw recently, there could be a sudden rise in the number of Sumatra squalls and as a result lead to close to normal rains. But for now, I am leaning more to less than normal rainfall for now and I am anticipating below normal to near average rainfall (-60% to 10%).

Next talk about Temps

Station Name	Average High /C	Average Low /C
Paya Lebar	33.57	25.67
Pulau Ubin	33.50	25.13
Yishun	33.28	24.90
Admiralty	33.25	25.61
Ang Mo Kio	33.23	25.75
Choa Chu Kang South	33.16	25.2
Tai Seng	33	26.13
Clementi	32.99	25.66
Newton	32.96	25.66
Tengah	32.91	24.77
Jurong West	32.49	25.10
Changi	32.42	25.86
Sentosa	32.38	26.24
Jurong Island	32.08	26.18
Tuas South	31.79	26.10
Pasir Panjang	31.43	26.62
Semakau Island	31.23	27.12
East Coast Park	30.8	26.7
Average	32.50	25.87

Highest temperature table.

Station Name	Date	Temperature
Ang Mo Kio	20/05/26	35.7
Yishun	19/05/26	35.4
Choa Chu Kang South	27/05/26	35.1

Lowest temperature table

The lowest temperatures recorded in Mar 2026 is as follows

Station Name	Date	Temperature /C
Pulau Ubin	30/05/26	22.5
Admiralty/Jurong West	30/05/26	22.6
Newton	30/05/26	22.9

For June 2026, expect above average temperatures as cloud cover will be quite low in the afternoon in the coming days. Expect highs to exceed 34 almost everyday and on some days 35. On days with close to normal cloud cover, expect highs close to 36. For nights, due to Sumatra Squalls, temps may fall to 21-25 on these days and on others, may be between 26-30 on other nights. Overall, expect generally warm weather.

Disclaimer: I had gone for outfield for NS and had taken a small break of 8 days for temps and 2 days for rain, hence data may be slightly different but not too much should change. Also my outfield was wet. Everyday got Cat 1

[u/kpthekia]

Appreciate the long post, all I will take away is good luck to my electricity bills

[u/FlipFlopForALiving → u/kpthekia]

Time to schedule aircon servicing too

[u/max_wen → u/kpthekia]

Leave the house in the afternoon

[u/mt-tekka]

From all the info, my takeaway is:

 *More hot, more humid for all of June.

*Afternoons will be when people can start roasting. 

*Rest of year will be really hot.

*Nights may be slightly less hot.

Tldr: It's hot and sweaty, but worse than now.

[u/DependentSpecific206]

Oh yeah time to bring out my suede shoes

[u/LuminousSnow]

Always look forward to your weather report thank you kind sir! Btw just curious, do you also check your previous writeups to see if any models or sources are 'better' at predicting than the rest?

[u/evergreen_brightness]

South region got hit hardest in May, that 40% anomaly is wild. June sounds rough though, sub 34 degree highs basically gone. Nights staying warm from the squalls means no real relief either.

[u/virtuosaenjoyer]

oh thank god. is2g every time I went out w friends it started raining heavily 😭

[u/Regular_Airpods → u/virtuosaenjoyer]

go out with your friends more please

[u/bigcarrot01 → u/Regular_Airpods]

In fact better go out everyday from 9pm till 4am daily so everyone can have a good sleep

/s