5-day weather forecast Riga Sep 18, 2026

19°11° · Overcast

Weather forecast Riga Friday Sep 18, 2026: overcast, temperature from 11 °C to 19 °C.

Precipitation probability 36%. Wind up to 6.11 m/s (gusts 13.11 m/s). Air humidity 51–86%, atmospheric pressure 757–758 mm Hg, UV index up to 2.2.

Weather Alerts

ModerateSep 16, 12:00 PM — Sep 16, 11:00 PMTranslate with Google

Dzeltenais vēja brīdinājums

16.09.2026. laika posmā no plkst. 12:00 līdz plkst. 16:00 dienvidu, dienvidrietumu vējš pastiprināsies brāzmās līdz 15-16 m/s. Viļņu augstums 1.0-1.5 m.

5 days at a glance — tap a day to open it

Sunrise 07:00
Sunset 19:34

First Quarter53% illuminated
Moonrise 17:02 · Moonset 21:49

Chart

Table

← Thu, Sep 17

Fri, Sep 18, 2026

Sat, Sep 19 →

Forecast from 11 °C to 19 °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)	11	12	12	11	11	11	11	11	11	12	14	16	17	18	19	19	19	17	16	16	15	15	15	14
Precipitation (mm/hr)	0.01	0.02	0.01	0.01	0	0	0	0	0	0	0	0	0	0	0	0	0.01	0	0	0	0.01	0.03	0.21	0.04

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 (%)	100	100	79	73	100	100	100	100	100	100	100	93	96	100	100	100	100	100	100	100	100	100	100	100
Rain chance (%)	22	20	17	20	27	27	27	28	27	24	20	16	14	13	12	12	13	14	15	16	20	23	36	24

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)	5.11	5.5	5.89	5.39	5	5	5.31	5.5	5.69	5.81	5.89	6	6.11	5.81	5.89	5.81	6.11	5.39	5.31	5.89	5.61	5.5	5.31	5.69
Wind gust (m/s)	10.11	11.61	12.31	11.69	11.33	12.03	12.42	12.44	13.11	13.03	12.39	11.11	9.22	8.89	8.92	9.31	9.83	10.11	11.31	11.03	11	11.89	11.5	11.92
Wind direction (°)	SW 215°	SW 217°	SW 223°	SW 221°	SSW 212°	SSW 206°	SSW 199°	SSW 199°	SSW 198°	SSW 199°	SSW 201°	SSW 202°	SSW 209°	SSW 207°	SSW 208°	SSW 203°	SSW 210°	SSW 206°	SSW 197°	SSW 197°	SSW 195°	S 187°	S 185°	S 183°

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 (%)	74	71	73	81	85	85	86	86	85	80	73	67	59	55	51	52	52	58	62	65	71	74	76	75

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)	757	757	757	757	757	757	758	758	758	758	758	758	758	758	758	758	758	758	758	758	758	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	0.1	0.3	0.8	1.4	1.9	2.1	2.2	1.7	1.2	0.5	0.2	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)	4.4	4.7	4.5	3.2	3.3	3.6	4	4.7	5.5	5.1	5.2	4.9	5.1	5.4	5.8	5.6	5	4.5	4.7	6.3	6.1	5.8	6.1	6
PM10 (µg/m³)	9.9	9	8.5	8.9	8.8	8.6	8.5	8.4	8.3	9.3	8.9	9	8.7	8.4	8.8	7.9	7.3	7.4	8.3	9.3	9	8.7	8.5	8.5
Ozone (O₃) (µg/m³)	61	61	61	62	60	58	55	52	50	49	48	54	58	64	69	72	72	73	71	70	71	69	69	70
NO₂ (µg/m³)	4.1	4	3.8	3.1	3.1	3.3	3.7	5.1	7.4	7.2	6.9	5.9	5	3.7	3.5	3.6	3.8	3.9	4.7	5.6	5.2	4.1	4.1	3.9
SO₂ (µg/m³)	1.2	1.2	0.9	0.7	0.8	1.1	1	0.8	0.8	1.1	2.5	4.2	3.9	3	2.7	3.1	2	1.2	1	0.9	0.9	1	0.8	1
CO (µg/m³)	188	185	182	180	179	178	179	183	194	196	191	189	186	183	185	186	185	188	191	192	190	188	190	190

← Thu, Sep 17

Fri, Sep 18, 2026

Sat, Sep 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.

Learn more about our methodology →