Climate averages 1991–2020
St. Petersburg weather
in December.
A mild, moderately wet month: the 10th warmest and the joint 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a mild month in St. Petersburg: daytime highs average 20.8°C and nights cool to about 15.1°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 53 mm of rain on roughly 6 days, which makes December a moderately wet month (the joint 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 25 min on an average December day.
The nearest other city in this atlas is Largo (19 km away). In December its highs average 20.0°C, 0.8°C cooler than St. Petersburg, with 56 mm of rain.
Among the 498 cities listed in the United States, St. Petersburg ranks 35th of 498 for the warmest December highs and joint 158th of 498 for the driest December (rainfall, lowest first). The mean December high of those 498 cities is 10.5°C; St. Petersburg is 10.3°C warmer than that mean.
From December to January, average highs fall by 1.6°C to 19.2°C, and monthly rainfall rises from 53 mm to 64 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
St. Petersburg climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 19.2°C13.3°C | 13.3°C | 64 | 6.3 | 10.611 h |
| February | 20.1°C14.3°C | 14.3°C | 49 | 5.8 | 11.211 h |
| March | 22.1°C16.2°C | 16.2°C | 57 | 6.0 | 12.012 h |
| April | 25.0°C19.2°C | 19.2°C | 44 | 5.1 | 12.813 h |
| May | 27.9°C22.1°C | 22.1°C | 53 | 6.7 | 13.514 h |
| June | 29.4°C24.7°C | 24.7°C | 136 | 16.1 | 13.914 h |
| July | 29.8°C25.5°C | 25.5°C | 135 | 20.0 | 13.714 h |
| August | 29.9°C25.6°C | 25.6°C | 146 | 21.2 | 13.113 h |
| September | 29.2°C24.7°C | 24.7°C | 139 | 15.8 | 12.312 h |
| October | 27.0°C21.8°C | 21.8°C | 63 | 7.1 | 11.512 h |
| November | 23.4°C17.8°C | 17.8°C | 42 | 4.2 | 10.811 h |
| December, selected | 20.8°C15.1°C | 15.1°C | 53 | 5.6 | 10.410 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Largo in DecemberUnited States · 19 kmHigh 20.0°C · Low 15.6°C · 56 mm rain
- Clearwater in DecemberUnited States · 25 kmHigh 19.8°C · Low 15.3°C · 56 mm rain
- Town 'n' Country in DecemberUnited States · 28 kmHigh 21.2°C · Low 14.1°C · 50 mm rain
- Tampa in DecemberUnited States · 29 kmHigh 21.9°C · Low 13.2°C · 50 mm rain
- Brandon in DecemberUnited States · 43 kmHigh 22.4°C · Low 13.3°C · 49 mm rain
- Lakeland in DecemberUnited States · 78 kmHigh 22.3°C · Low 12.9°C · 46 mm rain
- Spring Hill in DecemberUnited States · 80 kmHigh 21.5°C · Low 12.5°C · 61 mm rain
- Fort Myers in DecemberUnited States · 152 kmHigh 24.1°C · Low 15.2°C · 33 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for St. Petersburg) is explained once on the St. Petersburg year overview and on the Sources, method and limits page.