5-day weather forecast Riga 18-05-2026

Weather forecast Riga tomorrow 18.05.2026: partly cloudy, temperature from 8 °C to 12 °C.

Precipitation probability 61%. Wind up to 5.69 m/s (gusts 9.06 m/s). Air humidity 73–99%, atmospheric pressure 757–764 mm Hg, UV index up to 2.3.

Sunrise 05:00
Sunset 21:42

Waxing Crescent2% illuminated
Moonrise 05:02 · Moonset below the horizon

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Table

← Sun, May 17

Mon, May 18, 2026

Tue, May 19 →

Forecast from 8 °C to 12 °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)	8	8	8	8	8	8	8	9	10	11	12	12	12	11	11	10	10	10	10	10	10	11	11	11
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0.03	0.64	1.74	1.43	2.91	5.01	2.11	0.33	0.23	0.26	0.4	0.5	0.91

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 (%)	80	27	29	40	44	29	17	74	62	78	96	58	71	84	100	100	100	100	100	100	100	100	100	100
Rain chance (%)	0	0	0	0	0	0	0	0	0	0	0	61	100	100	100	100	100	100	100	100	100	100	100	100

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)	3.31	3.69	3.69	3.69	3.31	3.61	4.11	3.81	4.19	4.31	4.31	3.81	3.81	3.89	4.61	5.39	5.5	5.61	5.69	5.69	5.39	4.69	3.69	2.69
Wind gust (m/s)	6.78	7.39	7.22	7.08	6.58	7.22	7.5	6.08	6.17	6.14	6.28	5.97	5.67	5.86	7.42	8.5	8.58	8.81	9.06	9	8.61	7.36	5.97	4.33
Wind direction (°)	NNE 13°	N 5°	NNE 12°	NNE 19°	NNE 16°	N 10°	NNE 12°	NNE 15°	N 9°	NNE 18°	NNE 17°	NNE 22°	NNE 31°	NNE 20°	N 5°	N 9°	N 2°	N 356°	N 2°	N 4°	N 8°	NNE 16°	NNE 19°	N 11°

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 (%)	80	77	75	73	74	75	75	77	78	78	79	80	85	94	97	97	98	98	98	97	98	98	99	99

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)	764	764	764	764	764	764	763	763	763	763	763	762	762	762	761	761	760	760	759	759	758	758	758	757

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	0.1	0.3	0.7	1	0.9	1	1.2	2.3	1.2	0.6	0.4	0.2	0.1	0.1	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)	6.3	6.7	6.2	5.9	5.9	5.7	5.3	5.3	5.5	5.8	6.5	6.6	7.1	7.3	7.6	7.1	6.7	6.5	6.1	6.1	6.7	7.5	9.4	8.2
PM10 (µg/m³)	10.2	10.7	10.2	9.7	8.3	8.4	8.6	8.7	8.7	8.8	9.4	10.2	10.4	10.1	10.8	8.9	9.5	9.8	9.7	10.6	11.4	12.5	13.8	13.8
Ozone (O₃) (µg/m³)	81	75	72	71	69	68	67	64	62	60	58	54	53	56	62	65	69	72	76	76	74	71	70	71
NO₂ (µg/m³)	4.6	4.8	4.4	4.2	4.1	4	3.6	4.1	4.3	4.8	6.6	9.5	9.7	9.5	8.6	7.7	7.5	7.5	6.7	7	8.2	10.6	11.3	9.8
SO₂ (µg/m³)	1.7	1.6	1.6	1.5	1.4	1.3	1.3	1.4	1.5	1.5	1.8	2	2	2	1.9	1.8	1.8	1.7	1.6	1.7	1.7	1.8	2	2.1
CO (µg/m³)	142.9	146.9	145.9	141.9	136.9	131.9	130.9	130.9	131.9	132.9	140.9	147.9	160.9	160.9	158.9	150.9	145.9	151.9	143.9	151.9	154.9	159.9	170.9	170.9

← Sun, May 17

Mon, May 18, 2026

Tue, May 19 →

Riga on the map

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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