5-day weather forecast Saint Petersburg 18-05-2026

Weather forecast Saint Petersburg tomorrow 18.05.2026: partly cloudy, temperature from 10 °C to 18 °C.

Precipitation probability 100%. Wind up to 4.5 m/s (gusts 6.92 m/s). Air humidity 51–93%, atmospheric pressure 761–765 mm Hg, UV index up to 3.8.

Sunrise 04:15
Sunset 21:37

Waxing Crescent2% illuminated
Moonrise 03:54 · Moonset 00:01

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Table

← Sun, May 17

Mon, May 18, 2026

Tue, May 19 →

Forecast from 10 °C to 18 °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)	10	10	10	10	11	10	11	12	13	14	16	16	18	17	15	14	14	14	15	15	15	14	13	12
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0	0	0.14	0.05	0.02	0	0	0	0.03	0.39	0.93	1.52	1.38

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 (%)	38	43	21	29	58	26	18	35	49	49	50	48	63	75	95	81	92	68	62	81	89	87	81	88
Rain chance (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	100	100	77	0	0	0	77	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)	2.19	2.39	2.31	2.31	2.31	2.31	2.11	2.31	3.19	3.81	4.19	4.31	4.19	4.31	3.69	4.19	4.11	3.11	4.5	4.5	4	3.81	3.61	3.19
Wind gust (m/s)	4.61	5.03	4.67	4.5	4.5	4.53	3.97	3.58	4.36	4.86	5.11	5.25	4.83	5.22	5.42	6.92	6.19	5	6.22	6.81	6.58	6.83	6.5	6.03
Wind direction (°)	N 355°	N 351°	N 0°	N 354°	N 5°	NNE 13°	NNE 19°	NNE 28°	NE 35°	NE 42°	NE 47°	NE 48°	NE 55°	ENE 60°	NE 36°	NNE 22°	NNE 31°	NNE 30°	NNE 31°	NNE 33°	NE 38°	NE 41°	NE 45°	NE 44°

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 (%)	77	77	73	70	66	65	66	63	57	54	52	52	51	56	66	73	72	74	69	70	74	81	88	93

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	765	765	764	764	765	764	764	764	764	764	764	764	764	763	764	763	762	762	762	762	761

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	0.2	0.4	0.9	1.5	2.3	2.5	3.8	2.6	1.2	0.4	0.7	0.3	0.7	0.4	0.1	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)	10.1	9.9	10.3	10.7	10.5	10.2	10.5	11.4	11.9	15	23.9	27.7	23.6	21.2	18	18.1	16.5	15.2	14	12.8	14.4	15.8	16	14.6
PM10 (µg/m³)	12.4	12.6	13.9	13.3	12.5	12.2	12.6	14.2	15.1	19.5	30	33.3	31.9	30.6	27.9	25	23.2	22.3	18.9	19.9	17.6	20.5	19.3	18.5
Ozone (O₃) (µg/m³)	56	42	36	37	40	37	37	32	30	28	21	18	26	34	45	55	65	65	64	62	56	51	44	44
NO₂ (µg/m³)	33.7	35.8	40.3	38.2	35.4	30.8	30.7	31.9	32.7	39.6	50.7	67.2	71.5	67	57.8	45.1	39.9	35.7	35.4	36.3	41.5	45.1	54.1	62.8
SO₂ (µg/m³)	5.3	5.8	5.5	4.5	3.8	3.6	3.8	4.3	5.1	8	10.5	17.1	15.1	14.4	10.8	9.3	7.6	6.9	5.8	5.8	6.1	6.8	7.3	7
CO (µg/m³)	200.9	200.9	191.9	180.9	174.9	167.9	167.9	174.9	182.9	237.9	378.9	495.9	536.9	485.9	398.9	317.9	282.9	249.9	229.9	249.9	272.9	297.9	337.9	314.9

← Sun, May 17

Mon, May 18, 2026

Tue, May 19 →

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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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