Climate Comfort Score
74/100
Good
NOAA 1991–2020 normals 74°F annual avg 3 stations
ST Petersburg, FL Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 74°F
- Avg annual temp
- 74/100
- Comfort score
- 53.6"
- Annual precip
- -3d
- Growing season
30-year climate normals from 3 weather stations (1991-2020).
The climate verdict for ST Petersburg
ST Petersburg, Florida averages 74°F a year and scores 74/100 on the comfort index - good, milder than 71% of U.S. cities.
- 74°F
- average temperature, NOAA 1991-2020 normal
- 74/100
- comfort score, milder than 71% of U.S. cities
- 53.6"
- annual precipitation
- -3 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
74°F (23°C)
Avg High
82°F
Avg Low
66°F
Annual Precip
53.6"
Comfort Score
74/100
Good
Avg Annual Temperature
74°F
30-year mean (NOAA NCEI)
Annual Precipitation
53.6"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (ST Petersburg) 74.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the ST Petersburg area.
How ST Petersburg compares to every U.S. city
ST Petersburg's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
74 Top 29% higher than 71% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for ST Petersburg
MethodologyST Petersburg's NOAA 1991-2020 normal sits inside a longer story: U.S. land temperatures have been tracking (and drifting from) the global mean since 1900, and the chart below shows that spread, with the most recent decade running warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 71°F (21°C) | 53°F (11°C) | 62°F (16°C) | 2.6" | N/A | 0.3 | 0.0 |
| February | 73°F (23°C) | 55°F (13°C) | 64°F (18°C) | 2.4" | N/A | 0.0 | 0.0 |
| March | 77°F (25°C) | 59°F (15°C) | 68°F (20°C) | 2.4" | N/A | 0.0 | 0.1 |
| April | 82°F (28°C) | 64°F (18°C) | 73°F (23°C) | 2.6" | N/A | 0.0 | 0.8 |
| May | 87°F (31°C) | 70°F (21°C) | 78°F (26°C) | 2.7" | N/A | 0.0 | 8.6 |
| June | 90°F (32°C) | 75°F (24°C) | 82°F (28°C) | 8.9" | N/A | 0.0 | 18.8 |
| July | 90°F (32°C) | 76°F (24°C) | 83°F (28°C) | 9.7" | N/A | 0.0 | 21.1 |
| August | 91°F (33°C) | 76°F (25°C) | 84°F (29°C) | 8.8" | N/A | 0.0 | 23.5 |
| September | 89°F (32°C) | 75°F (24°C) | 82°F (28°C) | 6.4" | N/A | 0.0 | 16.7 |
| October | 84°F (29°C) | 70°F (21°C) | 77°F (25°C) | 2.5" | N/A | 0.0 | 4.4 |
| November | 77°F (25°C) | 61°F (16°C) | 69°F (21°C) | 1.6" | N/A | 0.0 | 0.0 |
| December | 73°F (23°C) | 56°F (13°C) | 64°F (18°C) | 2.9" | N/A | 0.1 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 2.6"
9.7 days with precipitation
February 2.4"
7.5 days with precipitation
March 2.4"
6.1 days with precipitation
April 2.6"
5.5 days with precipitation
May 2.7"
6.4 days with precipitation
June 8.9"
15.0 days with precipitation
July 9.7"
18.3 days with precipitation
August 8.8"
17.4 days with precipitation
September 6.4"
13.2 days with precipitation
October 2.5"
6.4 days with precipitation
November 1.6"
5.9 days with precipitation
December 2.9"
7.5 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
January 14
50% probability date
Last Spring Freeze
January 17
50% probability date
Growing Season
-3 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
447
Higher = more heating needed
Cooling Degree Days
3,701
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 73% | 9.1 | 52% | 19% |
| February | 71% | 9.8 | 51% | 16% |
| March | 70% | 9.4 | 59% | 9% |
| April | 69% | 9.2 | 58% | 6% |
| May | 73% | 8.3 | 50% | 7% |
| June | 77% | 7.1 | 46% | 8% |
| July | 77% | 6.6 | 49% | 5% |
| August | 78% | 7.5 | 46% | 6% |
| September | 77% | 8.6 | 47% | 10% |
| October | 72% | 8.9 | 56% | 10% |
| November | 74% | 8.4 | 58% | 12% |
| December | 76% | 8.7 | 51% | 17% |
What ST Petersburg's climate means for you
ST Petersburg runs 74°F a year - peaking in August, coldest in January.
- Gardeners get about -3 frost-free days, with the last spring freeze near January 17 - plan the planting calendar around it, not the regional average.
- Energy bills track 447 heating and 3,701 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: ST Petersburg, FL
The NOAA 1991–2020 climate normals describe ST Petersburg, Florida as a location with an annual average temperature of 74°F, ranging from a mean daily high of 82°F to a mean daily low of 66°F. August is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from 3 weather stations, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. ST Petersburg receives roughly 53.6 inches of precipitation each year, with seasonal snowfall possible. The frost-free season averages -3 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near January 17 and the first fall freeze near January 14. For energy use, 447 heating degree days and 3,701 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, ST Petersburg scores 74/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, August-driven heat peaks in summer, and January-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.
Frequently Asked Questions
What is the average temperature in ST Petersburg, FL? ▼
The average annual temperature in ST Petersburg, Florida is 74°F. The warmest month averages 91°F (33°C) and the coldest averages 53°F (11°C).
How much rain does ST Petersburg get? ▼
ST Petersburg receives 53.6 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for ST Petersburg? ▼
ST Petersburg has a climate comfort score of 74/100 (Good), milder than 71% of U.S. cities in the PlainClimate database.
When is the growing season in ST Petersburg? ▼
ST Petersburg has approximately -3 frost-free days per year, with the last spring freeze around January 17 and the first fall freeze around January 14.
How much energy does heating and cooling require in ST Petersburg? ▼
ST Petersburg has 447 heating degree days and 3,701 cooling degree days annually, a cooling-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this ST Petersburg climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from 3 weather stations near ST Petersburg.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00012873. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.