Weather

St Petersburg Weather Today

Live rain radar, current conditions, an hour-by-hour outlook and a seven-day forecast for St Petersburg, with original writing about the city's climate from The Daily St Petersburg.

Wet day, 100% chance of rain. Bring a brolly.

Today's briefing

Good morning St Petersburg. We're starting the day at 22 degrees (feeling like 21) with a 60 percent chance of rain expected through today, so keep an umbrella handy as conditions look fairly unsettled. The mercury will peak at just 21 degrees today before dropping to a chilly 14 tonight, with a gentle breeze of 7 kilometres per hour and a UV index of 6. Grab a light jacket along with that brolly, as you'll definitely want the extra layer when the temperature dips this evening. The weekend isn't looking much brighter either, with Saturday's top of 22 degrees accompanied by a 96 percent chance of rain, and Sunday cooling further to 19 with an 79 percent chance of showers, so best to plan indoor activities if you can.

Partly cloudy · 20° in St Petersburg

20°

Partly cloudy · feels like 20°

Today: 21° / 16°
Humidity: 63%
Wind: 8 km/h SW
UV index: 5 · Moderate
Sunrise: 3:44 am
Sunset: 10:21 pm
Updated: 2:01 pm

Next 24 hours

Now
20°
75%
3pm
21°
80%
4pm
21°
88%
5pm
20°
97%
6pm
19°
100%
7pm
19°
95%
8pm
18°
85%
9pm
18°
71%
10pm
18°
51%
11pm
17°
29%
12am
17°
14%
1am
17°
14%
2am
17°
21%
3am
16°
29%
4am
15°
34%
5am
16°
39%
6am
16°
45%
7am
17°
52%
8am
17°
61%
9am
18°
69%
10am
18°
77%
11am
18°
85%
12pm
19°
92%
1pm
19°
96%

Live rain radar

Drag to pan, scroll the page over it

Animated rain radar via RainViewer (Bureau of Meteorology sources). Full BOM radar loop.

Seven-day forecast

Sat
Drizzle
21° 16°
Rain 100%
Sun
Drizzle
19° 15°
Rain 100%
Mon
Drizzle
18° 14°
Rain 86%
Tue
Showers
18° 12°
Rain 54%
Wed
Drizzle
20° 12°
Rain 53%
Thu
Thunderstorm
20° 14°
Rain 57%
Fri
Drizzle
26° 17°
Rain 35%

Air quality

Moderate

US AQI

PM2.5: 9
PM10: 12
Ozone: 66

Air quality by Open-Meteo (CAMS), in µg/m³.

Sun and moon

Sunrise: 3:44 am
Sunset: 10:21 pm
Daylight: 18h 37m

Waning gibbous

79% lit

From the weather desk

St Petersburg weather, explained

How to read the St Petersburg forecast

A good forecast is really three views at once. The current panel tells you what it feels like outside right now, which is what matters before you head out the door. The hourly strip is for planning the next part of your day: when the rain band arrives, when the wind picks up, when it is warm enough to walk. The seven-day outlook is for the week ahead, and it is most reliable in the first three or four days. Read it from the top down and you will almost always have what you need for St Petersburg.

What the UV index actually means

The UV index rates the strength of the sun's ultraviolet radiation on a simple scale. Below 3 is low and you can be outside safely without protection. From 3 to 7 is moderate to high, the point at which sunburn becomes likely within an hour, so a hat and sunscreen earn their keep. Above 8 is very high to extreme, and skin can burn in minutes around the middle of the day. The index peaks at solar noon, not at the hottest part of the afternoon, so the safest habit is to check the number rather than judge by the temperature.

Why the overnight low matters as much as the high

Daytime maximums get the headlines, but the overnight minimum shapes how the day actually feels. A cold night means a slow, crisp start and, on clear evenings, the chance of fog or frost before dawn. A mild night means the warmth carries over and the morning is comfortable from the outset. Clear skies let heat escape and push the low down; cloud cover traps it and keeps the night warmer. That is why two days with the same maximum can feel completely different depending on the night that came before.

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Weather data by Open-Meteo. The Daily St Petersburg is independent and not affiliated with any government weather agency.

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