St. Petersburg weather by month
What a typical year looks like in St. Petersburg, Pennsylvania: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Clarion 3 SW, 19 km from St. Petersburg; records cover 1943–2026.
The year at a glance
- Precipitation a year
- 46.9 in1191 mm
- Snow a year
- Rare
- Last spring freeze
- May 7
- First fall freeze
- Oct 11
- Heating degree days
- 6,707
- Cooling degree days
- 448
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −4°−20° (heating, 99%) and 92°33° (cooling, 1%).
Month by month
St. Petersburg in January
Highs average 33°1° and lows 16°−9°, with 3.6 in92 mm of precipitation in a typical January.
- Record high
- 72°22° (1950)
- Record low
- −25°−32° (1948)
- Heating degree days
- 1258
- Cooling degree days
- 0
St. Petersburg in February
Highs average 36°2° and lows 16°−9°, with 2.7 in69 mm of precipitation in a typical February.
- Record high
- 73°23° (2018)
- Record low
- −26°−32° (1961)
- Heating degree days
- 1093
- Cooling degree days
- 0
St. Petersburg in March
Highs average 46°8° and lows 23°−5°, with 3.5 in89 mm of precipitation in a typical March.
- Record high
- 84°29° (1990)
- Record low
- −16°−27° (2015)
- Heating degree days
- 950
- Cooling degree days
- 0
St. Petersburg in April
Highs average 60°16° and lows 33°0°, with 4.1 in103 mm of precipitation in a typical April.
- Record high
- 92°33° (1976)
- Record low
- 5°−15° (1964)
- Heating degree days
- 559
- Cooling degree days
- 1
St. Petersburg in May
Highs average 71°22° and lows 44°6°, with 3.9 in98 mm of precipitation in a typical May.
- Record high
- 97°36° (1991)
- Record low
- 17°−8° (1971)
- Heating degree days
- 262
- Cooling degree days
- 25
St. Petersburg in June
Highs average 79°26° and lows 53°11°, with 4.7 in118 mm of precipitation in a typical June.
- Record high
- 101°38° (1991)
- Record low
- 25°−4° (1978)
- Heating degree days
- 67
- Cooling degree days
- 87
St. Petersburg in July
Highs average 82°28° and lows 57°14°, with 5.3 in135 mm of precipitation in a typical July.
- Record high
- 101°38° (1991)
- Record low
- 36°2° (1962)
- Heating degree days
- 16
- Cooling degree days
- 158
St. Petersburg in August
Highs average 81°27° and lows 56°13°, with 4.2 in107 mm of precipitation in a typical August.
- Record high
- 104°40° (1991)
- Record low
- 31°−1° (1982)
- Heating degree days
- 24
- Cooling degree days
- 131
St. Petersburg in September
Highs average 74°23° and lows 50°10°, with 4 in102 mm of precipitation in a typical September.
- Record high
- 97°36° (1954)
- Record low
- 25°−4° (1957)
- Heating degree days
- 140
- Cooling degree days
- 43
St. Petersburg in OctoberThis month
Highs average 62°17° and lows 38°3°, with 3.6 in92 mm of precipitation in a typical October.
- Record high
- 87°31° (1946)
- Record low
- 11°−12° (1965)
- Heating degree days
- 470
- Cooling degree days
- 3
St. Petersburg in November
Highs average 49°9° and lows 29°−2°, with 3.6 in90 mm of precipitation in a typical November.
- Record high
- 80°27° (1950)
- Record low
- −1°−18° (1958)
- Heating degree days
- 783
- Cooling degree days
- 0
St. Petersburg in December
Highs average 38°3° and lows 22°−5°, with 3.7 in95 mm of precipitation in a typical December.
- Record high
- 70°21° (1982)
- Record low
- −23°−31° (1950)
- Heating degree days
- 1085
- Cooling degree days
- 0