Skip to content
VSWeather

Lake Hopatcong, NJ weather and climate

Morris County, NJ · population 10,383 · about 981 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Lake Hopatcong's own coordinates.

The year at a glance

Sunny days
194
clear or partly cloudy, per year
Precipitation
47 in
per year
Wet days
127
rain or snow per year
Snowfall
30 in
per year
Hot days
11
above 90 °F
Freezing nights
130
at or below 32 °F
Humidity
71%
average relative
Average temperature
51 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
20406080JanMarMayJulSepNovDaily high, Jan: 36 °FDaily high, Feb: 39 °FDaily high, Mar: 47 °FDaily high, Apr: 60 °FDaily high, May: 71 °FDaily high, Jun: 79 °FDaily high, Jul: 84 °FDaily high, Aug: 82 °FDaily high, Sep: 75 °FDaily high, Oct: 63 °FDaily high, Nov: 52 °FDaily high, Dec: 41 °FDaily low, Jan: 18 °FDaily low, Feb: 19 °FDaily low, Mar: 28 °FDaily low, Apr: 38 °FDaily low, May: 48 °FDaily low, Jun: 57 °FDaily low, Jul: 62 °FDaily low, Aug: 60 °FDaily low, Sep: 52 °FDaily low, Oct: 41 °FDaily low, Nov: 32 °FDaily low, Dec: 25 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high363947607179848275635241
Daily low181928384857626052413225

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.02.04.0JanMarMayJulSepNovLake Hopatcong, Jan: 3.5 inLake Hopatcong, Feb: 3.1 inLake Hopatcong, Mar: 4.3 inLake Hopatcong, Apr: 3.8 inLake Hopatcong, May: 3.9 inLake Hopatcong, Jun: 4.2 inLake Hopatcong, Jul: 4.3 inLake Hopatcong, Aug: 4.0 inLake Hopatcong, Sep: 4.5 inLake Hopatcong, Oct: 4.1 inLake Hopatcong, Nov: 3.3 inLake Hopatcong, Dec: 4.1 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Lake Hopatcong3.53.14.33.83.94.24.34.04.54.13.34.1

Monthly sunny days

Days each month with clear or partly cloudy skies.

051015JanMarMayJulSepNovLake Hopatcong, Jan: 16 daysLake Hopatcong, Feb: 15 daysLake Hopatcong, Mar: 16 daysLake Hopatcong, Apr: 15 daysLake Hopatcong, May: 15 daysLake Hopatcong, Jun: 15 daysLake Hopatcong, Jul: 18 daysLake Hopatcong, Aug: 17 daysLake Hopatcong, Sep: 17 daysLake Hopatcong, Oct: 18 daysLake Hopatcong, Nov: 16 daysLake Hopatcong, Dec: 15 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Lake Hopatcong161516151515181717181615

Compare Lake Hopatcong with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered New Jersey city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).