Upper Greenwood Lake weather by month
What a typical year looks like in Upper Greenwood Lake, New Jersey: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at CHARLOTTEBURG RESERVOIR, 18 km from Upper Greenwood Lake; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 52.2 in1325 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 28
- First fall freeze
- Oct 13
- Heating degree days
- 6,063
- Cooling degree days
- 635
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 1°−17° (heating, 99%) and 92°33° (cooling, 1%).
Month by month
Upper Greenwood Lake in January
Highs average 36°2° and lows 19°−7°, with 4.1 in104 mm of precipitation in a typical January.
- Record high
- 71°22° (1950)
- Record low
- −26°−32° (1912)
- Heating degree days
- 1170
- Cooling degree days
- 0
Upper Greenwood Lake in February
Highs average 39°4° and lows 19°−7°, with 3.2 in80 mm of precipitation in a typical February.
- Record high
- 76°24° (2018)
- Record low
- −25°−32° (1943)
- Heating degree days
- 1008
- Cooling degree days
- 0
Upper Greenwood Lake in March
Highs average 47°8° and lows 27°−3°, with 4.5 in113 mm of precipitation in a typical March.
- Record high
- 85°29° (1945)
- Record low
- −10°−23° (1943)
- Heating degree days
- 871
- Cooling degree days
- 0
Upper Greenwood Lake in April
Highs average 59°15° and lows 38°3°, with 4.2 in107 mm of precipitation in a typical April.
- Record high
- 93°34° (2002)
- Record low
- 6°−14° (1923)
- Heating degree days
- 509
- Cooling degree days
- 5
Upper Greenwood Lake in May
Highs average 70°21° and lows 48°9°, with 4 in102 mm of precipitation in a typical May.
- Record high
- 96°36° (1936)
- Record low
- 23°−5° (1922)
- Heating degree days
- 228
- Cooling degree days
- 31
Upper Greenwood Lake in June
Highs average 78°25° and lows 57°14°, with 4.9 in123 mm of precipitation in a typical June.
- Record high
- 99°37° (1934)
- Record low
- 29°−2° (1957)
- Heating degree days
- 51
- Cooling degree days
- 118
Upper Greenwood Lake in July
Highs average 83°28° and lows 61°16°, with 4.6 in117 mm of precipitation in a typical July.
- Record high
- 105°41° (1936)
- Record low
- 36°2° (1912)
- Heating degree days
- 6
- Cooling degree days
- 228
Upper Greenwood Lake in August
Highs average 81°27° and lows 60°15°, with 4.3 in110 mm of precipitation in a typical August.
- Record high
- 100°38° (1933)
- Record low
- 32°0° (1940)
- Heating degree days
- 13
- Cooling degree days
- 181
Upper Greenwood Lake in September
Highs average 75°24° and lows 52°11°, with 4.9 in124 mm of precipitation in a typical September.
- Record high
- 100°38° (1953)
- Record low
- 23°−5° (1904)
- Heating degree days
- 108
- Cooling degree days
- 66
Upper Greenwood Lake in OctoberThis month
Highs average 63°17° and lows 41°5°, with 5 in126 mm of precipitation in a typical October.
- Record high
- 90°32° (1941)
- Record low
- 10°−12° (1936)
- Heating degree days
- 404
- Cooling degree days
- 6
Upper Greenwood Lake in November
Highs average 51°11° and lows 32°0°, with 3.8 in96 mm of precipitation in a typical November.
- Record high
- 81°27° (1950)
- Record low
- −1°−18° (1938)
- Heating degree days
- 700
- Cooling degree days
- 0
Upper Greenwood Lake in December
Highs average 41°5° and lows 25°−4°, with 4.8 in122 mm of precipitation in a typical December.
- Record high
- 73°23° (1998)
- Record low
- −19°−28° (1917)
- Heating degree days
- 995
- Cooling degree days
- 0