National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Andover, Aeroflex-Andover Airport (K12N)

Lat: 41.01°NLon: 74.74°WElev: 584ft.

42°F

6°C

Humidity 73%
Wind Speed Vrbl 6 mph
Barometer 30.22 in (1024.1 mb)
Dewpoint 34°F (1°C)
Visibility NA
Wind Chill38°F (3°C)
Last update 15 Mar 8:54 pm EDT
Extended Forecast for

Sparta NJ

  • Tonight

    Tonight: Rain, with thunderstorms also possible after 5am. Temperature rising to around 49 by 5am. East wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 39 °F⇑

    Slight Chance
    Rain then
    Rain

  • Monday

    Monday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. Some of the storms could be severe. High near 65. South wind 10 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 65 °F

    Showers then
    Severe
    Thunderstorms

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could be severe. Low around 28. Breezy, with a south wind 15 to 25 mph becoming west after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 28 °F

    Breezy.
    Severe
    Thunderstorms
    then Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38. West wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 38 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 19. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 19 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Rain, with thunderstorms also possible after 5am. Temperature rising to around 49 by 5am. East wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. Some of the storms could be severe. High near 65. South wind 10 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Some of the storms could be severe. Low around 28. Breezy, with a south wind 15 to 25 mph becoming west after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday
Mostly sunny, with a high near 38. West wind 10 to 15 mph, with gusts as high as 30 mph.
Tuesday Night
Partly cloudy, with a low around 19. West wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 24.
Thursday
Partly sunny, with a high near 47.
Thursday Night
Mostly cloudy, with a low around 31.
Friday
Partly sunny, with a high near 52.
Friday Night
A chance of showers. Mostly cloudy, with a low around 35. Chance of precipitation is 40%.
Saturday
A chance of showers. Mostly cloudy, with a high near 53. Chance of precipitation is 40%.
Saturday Night
Partly cloudy, with a low around 32.
Sunday
Mostly sunny, with a high near 48.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sparta NJ
 41.05°N 74.62°W (Elev. 600 ft)
Last Update:
4:13 pm EDT Mar 15, 2026
Forecast Valid:
9pm EDT Mar 15, 2026-6pm EDT Mar 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation