5-day weather forecast Saint Petersburg 18-07-2026

Weather forecast Saint Petersburg Saturday, July 18 18.07.2026: sunny, temperature from 13 °C to 27 °C.

Precipitation probability 8%. Wind up to 5 m/s (gusts 8.78 m/s). Air humidity 31–75%, atmospheric pressure 756–761 mm Hg, UV index up to 5.1.

Sunrise 04:09
Sunset 22:00

Waxing Crescent23% illuminated
Moonrise 09:53 · Moonset 22:48

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Table

← Fri, Jul 17

Sat, Jul 18, 2026

Sun, Jul 19 →

Forecast from 13 °C to 27 °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	14	13	13	13	13	14	17	19	21	23	24	25	26	27	27	27	27	27	25	23	22	20	19
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 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 (%)	0	0	0	0	3	6	6	7	7	4	4	6	6	4	12	14	27	43	50	27	31	24	9	4
Rain chance (%)	5	5	6	7	7	8	7	4	3	2	1	1	1	1	1	1	2	3	4	4	5	5	4	4

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)	2.61	2.69	2.69	2.61	2.5	2.61	2.61	2.89	3.39	3.69	4.19	4.61	4.69	4.81	5	4.89	4.5	4.11	3.39	2.5	2.5	3.5	4.19	4.31
Wind gust (m/s)	5.47	5.67	5.67	5.47	5.25	5.47	5.47	4.58	4.47	4.42	4.83	5.28	5.42	5.53	5.75	5.64	5.17	5.25	4.56	4.33	4.83	7.31	8.58	8.78
Wind direction (°)	S 169°	S 179°	S 187°	S 185°	S 183°	S 173°	S 171°	S 177°	S 185°	S 181°	S 180°	S 185°	S 187°	S 187°	S 189°	S 190°	S 190°	S 183°	SSW 200°	SSW 201°	S 178°	SSE 162°	S 169°	SSE 163°

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 (%)	65	67	70	73	75	75	71	63	55	50	45	40	36	33	31	31	35	39	43	54	60	62	59	61

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	761	761	761	760	760	759	759	759	758	758	758	757	757	756	756	756	756	756	756

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	0.3	0.7	1.4	2.1	3.2	4.5	5.1	5	5	4.4	3.4	2.2	1.2	0.6	0.3	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)	16.7	13.8	11.5	10.4	8.7	8.4	9.5	10.7	11.1	10.9	9.2	8.4	7.7	7.4	7.1	7	6.8	6.8	6.8	6.6	5.8	5.5	6.8	7
PM10 (µg/m³)	23.8	17.7	14.5	14.2	12.3	10.9	11.1	14.6	14.6	14.2	12.2	11.7	11.2	10.7	10.7	10.2	10	10.1	9.6	8.2	8.3	8	9.3	9.3
Ozone (O₃) (µg/m³)	3	3	13	21	27	30	33	38	40	44	56	68	76	78	79	81	80	77	74	64	64	56	46	41
NO₂ (µg/m³)	66.7	49	38.5	37.5	26.4	23.8	23.4	26.5	30	29.7	30.9	27.2	24.9	22.3	23.2	22.3	21.7	22.2	21.9	24.8	27.9	29.8	30.5	33.2
SO₂ (µg/m³)	10.7	7.3	6.2	5.5	4.8	5.3	6.2	6.6	8	7.3	5.9	4.6	3.6	3.1	2.8	2.7	2.7	3.2	3.4	3.8	4	3.9	4.5	4.7
CO (µg/m³)	353	304	211	187	181	179	201	257	296	299	254	244	229	200	201	201	201	197	195	199	188	195	209	209

← Fri, Jul 17

Sat, Jul 18, 2026

Sun, Jul 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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