Weather WorldAltamont Lake, NY 7-Day Night Weather Forecast
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Altamont Lake, NY Weather Forecast
Altamont Lake, NY Weather Forecast Date: 335 PM EDT Fri Oct 02 2026
The area/counties/county of: Sullivan, including the city of Monticello.or toggle through each period.
Tonight... Mostly cloudy with a chance of showers this evening, then partly cloudy after midnight. Lows in the upper 40s. Northwest winds 5 to 10 mph. Chance of rain 40%.
Saturday... Sunny. Highs in the upper 60s. North winds around 5 mph.
Saturday Night... Mostly clear. Lows in the lower 40s. East winds around 5 mph.
Sunday... Partly sunny. Highs in the lower 60s. Southeast winds 5 to 10 mph.
Sunday Night... Mostly cloudy. Patchy fog. Lows in the upper 40s. South winds around 5 mph.
Monday... Partly sunny. Highs in the lower 60s.
Monday Night... Mostly clear. Lows in the upper 30s.
Tuesday... Sunny. Highs in the upper 50s.
Tuesday Night... Clear. Lows in the mid 30s.
Wednesday... Sunny. Highs in the mid 60s.
Wednesday Night... Mostly clear. Lows around 40.
Thursday... Mostly sunny. Highs in the upper 60s.
Thursday Night... Mostly clear. Lows in the mid 40s.
POP = Probability of Precipitation
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