5-day weather forecast Saint Petersburg 20-05-2026

Weather forecast Saint Petersburg Wednesday, May 20 20.05.2026: partly cloudy, temperature from 10 °C to 16 °C.

Precipitation probability 100%. Wind up to 5.19 m/s (gusts 6.56 m/s). Air humidity 69–98%, atmospheric pressure 761–766 mm Hg, UV index up to 3.9.

Sunrise 04:11
Sunset 21:42

Waxing Crescent15% illuminated
Moonrise 06:27 · Moonset 02:06

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← Tue, May 19

Wed, May 20, 2026

Thu, May 21 →

Forecast from 10 °C to 16 °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)	15	15	14	14	14	14	14	13	13	14	14	15	16	16	15	14	13	13	13	13	12	11	10	10
Precipitation (mm/hr)	0.31	0.59	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	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 (%)	72	80	11	14	17	100	100	100	100	100	100	100	77	64	58	69	66	100	44	27	24	22	49	58
Rain chance (%)	100	100	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	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)	0.5	0.39	1.39	0.89	2.11	2.61	3.19	3.19	3.11	3.31	3.19	2.89	3.11	3.81	4.5	4.69	4.81	5.19	4.69	4.61	2.81	2.31	2.69	1.61
Wind gust (m/s)	1.06	0.83	2.94	1.89	4.42	4.89	4.81	4.5	4.08	4.19	3.86	3.47	3.58	4.36	5.17	5.42	5.72	6.56	5.83	6.11	4.06	3.89	4.78	2.78
Wind direction (°)	NE 48°	NE 56°	SSE 161°	ESE 113°	WSW 239°	WSW 256°	W 276°	WNW 288°	W 272°	W 266°	W 269°	W 272°	WNW 288°	WNW 297°	NW 306°	NW 309°	WNW 303°	WNW 294°	WNW 294°	WNW 292°	WNW 294°	WNW 289°	WNW 292°	W 278°

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 (%)	93	92	94	93	95	98	97	96	92	89	84	78	73	69	71	74	74	73	72	75	79	84	87	87

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)	761	761	761	761	761	762	762	763	764	764	764	764	764	764	765	765	765	765	765	765	766	766	766	766

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	0.3	0.7	1.2	1.8	2.4	3.3	3.9	3.5	2.6	1.9	1.2	0.9	0.5	0.2	0	0	0

← Tue, May 19

Wed, May 20, 2026

Thu, May 21 →

Saint Petersburg 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 →