5-day weather forecast Saint Petersburg 21-05-2026

Weather forecast Saint Petersburg Thursday, May 21 21.05.2026: sunny, temperature from 9 °C to 16 °C.

Precipitation probability 64%. Wind up to 4.11 m/s (gusts 5.69 m/s). Air humidity 55–91%, atmospheric pressure 766–767 mm Hg, UV index up to 5.

Sunrise 04:08
Sunset 21:44

Waxing Crescent24% illuminated
Moonrise 08:19 · Moonset 02:21

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Table

← Wed, May 20

Thu, May 21, 2026

Forecast from 9 °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)	9	9	9	9	9	9	11	11	12	13	13	11	12	13	13	15	15	16	15	14	13	11	10	10
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0.02	0.19	0.22	0.08	0.31	0.01	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 (%)	57	90	75	62	80	100	86	79	69	90	100	100	80	88	100	69	46	9	2	0	0	0	1	1
Rain chance (%)	0	0	0	0	0	0	0	0	0	64	100	100	100	100	73	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)	3.11	1.61	2.39	1.89	2	1.81	2	2.19	2.39	2.89	2.81	2	1.89	1.11	0.69	1.81	2.31	2.69	4.11	3.31	2.11	2.19	2.19	2.19
Wind gust (m/s)	5.69	2.94	4.64	3.81	4.19	3.58	3.47	3.58	3.42	3.92	3.92	3.17	2.89	1.56	0.97	2.22	2.92	3.36	5.44	5	3.97	4.61	4.61	4.61
Wind direction (°)	WNW 285°	W 270°	WNW 284°	WNW 295°	W 280°	WNW 282°	WNW 288°	WNW 300°	WNW 292°	WNW 282°	WNW 282°	WNW 290°	WNW 291°	W 275°	WNW 284°	WNW 294°	WNW 283°	WNW 286°	WNW 289°	W 278°	W 269°	W 274°	W 274°	W 274°

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 (%)	88	88	87	88	91	89	85	82	78	75	78	87	87	83	81	70	66	59	55	56	63	69	72	74

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)	766	767	767	766	767	767	767	767	767	767	767	767	767	767	767	767	767	767	766	767	767	767	767	767

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	1	2	3	4	4.7	4.8	4.4	3.8	5	5	5	4	4	4	0	0

← Wed, May 20

Thu, May 21, 2026

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.

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