Glen St. Mary weather by month
What a typical year looks like in Glen St. Mary, Florida: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Glen St. Mary 1 W, 3 km from Glen St. Mary; records cover 1919–2026.
The year at a glance
- Precipitation a year
- 53.2 in1352 mm
- Snow a year
- Rare
- Last spring freeze
- Mar 4
- First fall freeze
- Nov 23
- Heating degree days
- 1,298
- Cooling degree days
- 2,687
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 23°−5° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
Glen St. Mary in January
Highs average 67°19° and lows 40°4°, with 3.7 in93 mm of precipitation in a typical January.
- Record high
- 89°32° (1932)
- Record low
- 7°−14° (1985)
- Heating degree days
- 370
- Cooling degree days
- 15
Glen St. Mary in February
Highs average 71°21° and lows 44°7°, with 3.5 in89 mm of precipitation in a typical February.
- Record high
- 89°32° (1962)
- Record low
- 14°−10° (1943)
- Heating degree days
- 239
- Cooling degree days
- 19
Glen St. Mary in March
Highs average 76°24° and lows 48°9°, with 3.7 in94 mm of precipitation in a typical March.
- Record high
- 93°34° (2026)
- Record low
- 9°−13° (2002)
- Heating degree days
- 154
- Cooling degree days
- 54
Glen St. Mary in April
Highs average 82°28° and lows 53°12°, with 3.1 in79 mm of precipitation in a typical April.
- Record high
- 95°35° (1922)
- Record low
- 27°−3° (2022)
- Heating degree days
- 52
- Cooling degree days
- 127
Glen St. Mary in May
Highs average 88°31° and lows 61°16°, with 2.9 in73 mm of precipitation in a typical May.
- Record high
- 102°39° (1945)
- Record low
- 37°3° (2020)
- Heating degree days
- 6
- Cooling degree days
- 289
Glen St. Mary in June
Highs average 91°33° and lows 69°20°, with 8.4 in214 mm of precipitation in a typical June.
- Record high
- 104°40° (1927)
- Record low
- 45°7° (1984)
- Heating degree days
- 0
- Cooling degree days
- 444
Glen St. Mary in July
Highs average 93°34° and lows 71°22°, with 6.8 in172 mm of precipitation in a typical July.
- Record high
- 102°39° (1981)
- Record low
- 54°12° (2020)
- Heating degree days
- 0
- Cooling degree days
- 527
Glen St. Mary in August
Highs average 92°33° and lows 71°22°, with 7.1 in181 mm of precipitation in a typical August.
- Record high
- 100°38° (1956)
- Record low
- 52°11° (2020)
- Heating degree days
- 0
- Cooling degree days
- 515
Glen St. Mary in September
Highs average 89°32° and lows 68°20°, with 5.8 in148 mm of precipitation in a typical September.
- Record high
- 99°37° (1925)
- Record low
- 40°4° (1990)
- Heating degree days
- 0
- Cooling degree days
- 407
Glen St. Mary in OctoberThis month
Highs average 83°28° and lows 59°15°, with 3.7 in93 mm of precipitation in a typical October.
- Record high
- 97°36° (1941)
- Record low
- 29°−2° (2008)
- Heating degree days
- 28
- Cooling degree days
- 202
Glen St. Mary in November
Highs average 75°24° and lows 49°10°, with 1.9 in49 mm of precipitation in a typical November.
- Record high
- 90°32° (2015)
- Record low
- 18°−8° (2021)
- Heating degree days
- 149
- Cooling degree days
- 62
Glen St. Mary in December
Highs average 69°21° and lows 43°6°, with 2.6 in67 mm of precipitation in a typical December.
- Record high
- 86°30° (1956)
- Record low
- 9°−13° (1962)
- Heating degree days
- 300
- Cooling degree days
- 26