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

Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Somerville, Somerset Airport (KSMQ)

Lat: 40.62°NLon: 74.67°WElev: 105ft.

Fog/Mist

70°F

21°C

Humidity 100%
Wind Speed NA
Barometer 29.92 in (1013.2 mb)
Dewpoint 70°F (21°C)
Visibility 6.00 mi
Last update 18 Aug 2:53 am EDT
Extended Forecast for

Hillsborough NJ

  • Overnight

    Overnight: Mostly cloudy, with a low around 64. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 64 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 74. Northeast wind around 10 mph, with gusts as high as 20 mph.

    High: 74 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 61. Northeast wind around 5 mph.

    Low: 61 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. East wind 5 to 10 mph.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 61. East wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers after 2pm. Partly sunny, with a high near 80. Chance of precipitation is 20%.

    High: 80 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 64. North wind around 10 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, with a high near 74. Northeast wind around 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 61. Northeast wind around 5 mph.
Tuesday
Mostly sunny, with a high near 77. East wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 61. East wind around 5 mph becoming calm in the evening.
Wednesday
A slight chance of showers after 2pm. Partly sunny, with a high near 80. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 60.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
A chance of showers. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Sunday
A chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hillsborough NJ
 40.47°N 74.62°W (Elev. 105 ft)
Last Update:
4:11 pm EDT Aug 17, 2025
Forecast Valid:
3am EDT Aug 18, 2025-6pm EDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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