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

Risks of Severe Thunderstorms and Excessive Rainfall; Fire Weather Concerns and Record Warmth

Severe thunderstorms and flash flooding risks increase across the center of the nation today. Meanwhile, ongoing thunderstorms and flash flooding will linger along the Gulf Coast states through the evening. The Great Basin and Intermountain West, warm temperatures and dry fuels with dry lightning may enhance fire weather potential. In addition, across interior Alaska, Red Flag Warning are posted. Read More >

Current conditions at

Greenville (KGNR)

Lat: 45.46°NLon: 69.55°WElev: 1394ft.

55°F

13°C

Humidity 90%
Wind Speed NW 6 mph
Barometer 29.39 in (995.3 mb)
Dewpoint 52°F (11°C)
Visibility NA
Wind Chill54°F (12°C)
Last update 20 Jun 6:56 am EDT
Extended Forecast for

Greenville ME

  • Today

    Today: Scattered showers before 2pm, then isolated showers after 3pm. Mostly cloudy, with a high near 66. Northwest wind 9 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 40%.

    High: 66 °F

    Scattered
    Showers

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 52. Northwest wind 3 to 5 mph.

    Low: 52 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. Patchy fog before 7am. High near 72. Northwest wind 3 to 5 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Slight Chance
    T-storms and
    Patchy Fog
    then Showers

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 11pm, then a slight chance of showers between 11pm and 1am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 53. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Showers
    Likely then
    Slight Chance
    Showers and
    Patchy Fog

  • Monday

    Monday: A chance of showers, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 73. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 73 °F

    Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 53. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 53 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 71. Light and variable wind becoming north 5 to 8 mph in the morning. Chance of precipitation is 50%.

    High: 71 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Partly cloudy, with a low around 55. Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 76. Chance of precipitation is 30%.

    High: 76 °F

    Chance
    Showers

Detailed Forecast

Today
Scattered showers before 2pm, then isolated showers after 3pm. Mostly cloudy, with a high near 66. Northwest wind 9 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 40%.
Tonight
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 52. Northwest wind 3 to 5 mph.
Sunday
Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. Patchy fog before 7am. High near 72. Northwest wind 3 to 5 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers likely and possibly a thunderstorm before 11pm, then a slight chance of showers between 11pm and 1am. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 53. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 73. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 53. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 71. Light and variable wind becoming north 5 to 8 mph in the morning. Chance of precipitation is 50%.
Tuesday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Partly cloudy, with a low around 55. Chance of precipitation is 20%.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 76. Chance of precipitation is 30%.
Wednesday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Partly cloudy, with a low around 55. Chance of precipitation is 20%.
Thursday
Showers and thunderstorms likely. Partly sunny, with a high near 74. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
Greenville ME
 45.45°N 69.58°W (Elev. 1119 ft)
Last Update:
5:20 am EDT Jun 20, 2026
Forecast Valid:
7am EDT Jun 20, 2026-6pm EDT Jun 26, 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