Weather in May
Temperature
May's arrival in Saint Petersburg coincides with a rise in the average high-temperature, moving from April's chilly 9.3°C (48.7°F) to a refreshing 16°C (60.8°F). Nighttime temperature in Saint Petersburg dips to a mean of 7°C (44.6°F) during May.Humidity
May is the least humid month in Saint Petersburg, with an average relative humidity of 65%.Rainfall
In Saint Petersburg, in May, during 16 rainfall days, 46mm (1.81") of precipitation is typically accumulated. In Saint Petersburg, during the entire year, the rain falls for 173 days and collects up to 662mm (26.06") of precipitation.Snowfall
In Saint Petersburg, Russia, snow does not fall in May through September.Sea temperature
In May, the average sea temperature in Saint Petersburg is 5.3°C (41.5°F).Note: Beware when you're in 5.3°C (41.5°F) waters; 13°C (55.4°F) is chilling and anything below 10°C (50°F) could cause breathing hindrance and a sudden cold shock, given your physical condition.
Daylight
The average length of the day in May in Saint Petersburg is 17h and 11min.On the first day of the month, sunrise is at 04:54 and sunset at 20:56. On the last day of May, in Saint Petersburg, sunrise is at 03:48 and sunset at 22:04 MSK.
Sunshine
In Saint Petersburg, the average sunshine in May is 8.4h.UV index
In Saint Petersburg, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 4 during May translates into the following guidance:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Frequently asked questions
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Average temperature in May
Saint Petersburg, Russia
- Average high temperature in May: 16°C
The warmest month (with the highest average high temperature) is July (23°C).
The months with the lowest average high temperature are January and February (-3°C).
- Average low temperature in May: 7°C
The month with the highest average low temperature is July (15°C).
The coldest month (with the lowest average low temperature) is February (-8.5°C).
Average humidity in May
Saint Petersburg, Russia
- Average humidity in May: 65%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is May (65%).
Average rainfall in May
Saint Petersburg, Russia
- Average rainfall in May: 46mm
The wettest month (with the highest rainfall) is August (83mm).
The driest month (with the least rainfall) is April (31mm).
Average rainfall days in May
Saint Petersburg, Russia
- Average rainfall days in May: 16 days
The months with the highest number of rainy days are September and October (20 days).
The month with the least rainy days is February (7 days).
Average snowfall days in May
Saint Petersburg, Russia
- Average snowfall days in May: 0 days
The months with the highest number of snowfall days are January, February and December (17 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in May
Saint Petersburg, Russia
- Average sea temperature in May: 5.3°C
The best month for swimming (with the highest average sea temperature) is July (19°C).
The coldest month (with the lowest average sea temperature) is February (-0.3°C).
Average daylight in May /
Average sunshine in May
Saint Petersburg, Russia
- Average daylight in May: 17h and 1min
The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 6min).
- Average sunshine in May: 8h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 12min).
The month with the least sunshine is December (Average sunshine: 0h and 24min).
Average UV index in May
Saint Petersburg, Russia
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, November and December (UV index 0).
Saint Petersburg, Russia
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