5-day weather forecast Petersburg 21-03-2026

Weather forecast Petersburg Saturday 21 March 21.03.2026: partly cloudy, temperature from 6 °C to 18 °C.

No precipitation expected. Wind up to 2.89 m/s (gusts 6 m/s). Air humidity 46–90%, atmospheric pressure 759–764 mm Hg, UV index up to 5.5.

Sunrise 07:17
Sunset 19:20

Chart

Table

Type of temperature:

°C

°F

← Fri, 20 Mar

Sat, 21 Mar, 2026

Sun, 22 Mar →

Forecast from 6 °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)	11	10	9	7	7	6	6	6	8	10	12	14	15	16	17	18	17	16	15	14	14	13	12	12
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Cloud cover

Cloud cover
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 (%)	65	82	99	45	44	47	33	28	28	30	27	24	32	59	48	88	98	86	100	100	100	26	12	30

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)	1.39	1.61	1.61	1.61	1.31	1.39	1.5	1.5	1.69	1.89	1.89	2.31	2.39	2.61	2.89	2.69	2.69	1.89	2.11	2.19	1.81	1.61	1.81	2.89
Wind gust (m/s)	2.89	3.19	3.25	3.36	2.72	2.89	3.14	3.14	3.33	2.47	2.19	2.64	2.75	3	3.33	3.11	3.36	2.97	3.67	4.03	3.64	3.36	3.78	6

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 (%)	67	67	68	88	89	85	90	90	85	73	63	56	51	50	48	46	49	60	66	71	75	82	86	66

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	760	760	763	763	763	763	763	763	764	764	764	763	763	762	761	761	761	761	762	762	759	760	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	0	0	0.8	2.1	3.5	4.8	5.5	4.9	4.1	2.6	1.2	0.4	0	0	0	0	0

← Fri, 20 Mar

Sat, 21 Mar, 2026

Sun, 22 Mar →

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 →