5-day weather forecast Singapore 21-04-2026

Weather forecast Singapore tomorrow 21.04.2026: patchy rain possible, temperature from 26 °C to 28 °C.

Precipitation probability 100%. Wind up to 4.81 m/s (gusts 8.31 m/s). Air humidity 72–83%, atmospheric pressure 755–758 mm Hg, UV index up to 11.7.

Sunrise 06:59
Sunset 19:08

Waxing Crescent17% illuminated
Moonrise 10:25 · Moonset 23:02

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Table

← Mon, Apr 20

Tue, Apr 21, 2026

Wed, Apr 22 →

Forecast from 26 °C to 28 °C and precipitation

Temperature & Precipitation
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Temperature (°C)	27	27	27	27	26	26	26	26	26	27	27	28	28	28	28	28	28	28	27	27	27	27	27	27
Precipitation (mm/hr)	1.4	1.04	0.65	0.71	0.57	0.11	0.15	0.19	0.18	0.01	0.51	1.21	1.48	0.48	0.24	0.03	0.62	0.8	0.55	0.07	0	0	0	0

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Cloud cover (%)	52	70	82	75	83	82	74	75	57	76	87	79	82	84	83	90	86	73	53	80	36	40	44	49
Rain chance (%)	100	100	100	100	100	100	100	100	100	89	100	100	100	100	100	89	100	100	100	100	0	0	0	0

Wind speed and direction

Wind & Wind gust
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Wind (m/s)	3.69	3.61	3.81	4	4	3.39	3.69	3	3.81	3.31	3.69	3.5	3.81	4.81	4.81	4.69	4.39	3.5	3	2.61	2.5	2.19	1.89	1.81
Wind gust (m/s)	6.5	6.81	7.47	6.06	6	5.22	5.94	4.89	6.39	4.42	4.81	4.72	6	8.03	8.31	6	5.64	4.64	4.31	3.78	3.64	3.11	2.67	2.53
Wind direction (°)	NE 35°	NNE 22°	NNE 12°	N 0°	N 354°	N 358°	NNW 345°	NNW 342°	NNW 335°	NNW 331°	NW 320°	NW 312°	W 273°	W 261°	WSW 256°	SW 236°	SW 225°	SW 219°	SSW 213°	SSW 207°	S 187°	S 190°	SSW 207°	SW 223°

Air humidity

Humidity
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Humidity (%)	83	83	82	82	83	83	83	83	83	81	79	74	72	73	74	75	75	77	77	78	80	80	80	80

Atmospheric pressure

Pressure
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Pressure (mm Hg)	758	758	757	756	756	756	756	757	758	758	758	758	758	758	757	756	755	755	755	756	757	758	758	758

Ultraviolet index

UV Index
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
UV Index	0	0	0	0	0	0	0	0	0.4	1.7	4.3	7.8	10.4	11.7	11	8.4	4.9	2.1	0.6	0	0	0	0	0

Air quality & pollen

Air quality
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
PM2.5 (µg/m³)	20.3	20.2	20.6	19.2	17.1	15.9	15	13.9	13	12.3	12.3	12.1	11.8	12.3	11.5	11.8	13.6	14.6	14.3	13.8	13.1	13.2	17.1	20.1
PM10 (µg/m³)	22.6	22.6	22.7	21.1	18.7	17.3	16.2	14.9	13.8	13	12.8	12.5	12	12.5	11.7	12	13.8	14.8	14.4	14	13.2	13.4	17.3	20.3
Ozone (O₃) (µg/m³)	71	66	57	46	37	32	28	25	21	16	12	9	6	5	7	11	17	27	40	53	65	77	84	83
NO₂ (µg/m³)	36.1	42.3	47.9	53.3	57.6	59.8	60.8	62.1	64.2	66.6	69.2	72.7	76.5	78	76.3	72.3	67.1	59.8	51.2	44.4	40.2	37.8	37.8	41.3
SO₂ (µg/m³)	11.2	11.3	12.4	13.9	15.1	15.5	15.6	15.6	15.6	15.6	16	17	18.4	19.7	21	22.3	22.6	21.2	18.9	16.8	15.2	13.8	12.9	12.9
CO (µg/m³)	230.9	275.9	405.9	579.9	711.9	757.9	762.9	769.9	810.9	853.9	856.9	773.9	648.9	571.9	605.9	687.9	719.9	645.9	520.9	413.9	344.9	292.9	266.9	249.9

← Mon, Apr 20

Tue, Apr 21, 2026

Wed, Apr 22 →

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Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.

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