Temperatures bounce around, but with very little accompanying rain

finger lakes weather forecast wednesday september 17 2025 a stripe of cut, yellowing grass and some longer blooming goldenrod flanked by trees showing the first tinges of color from changing leaves all beneath a mixed sky with blue patches interspersed among sheets of thin, white clouds
Clouds will knock temperatures back a little today, but they will jump again tomorrow before a more substantial drop Friday and Saturday. [Photo by Gwen Moshier]

Late Week Weather Forecast

A couple of weather systems will exert their influence on our weather over the next few days, but unfortunately, that will not include much, if any, rain.

Low pressure along the Mid-Atlantic coast is spreading some cloud cover into the area this morning. Most of these are thin clouds, but some thicker patches are also showing up.

This will continue to be the case throughout the day with varying degrees of filtered sunshine.

High pressure over New England will block this low from tracking further north, so no rain is expected with any of the clouds today.

Winds will be light from the east with speeds near or under 5 mph. The lack of southerly winds and the cloud cover will knock temperatures back slightly, with most areas in the mid 70s. Upper 70s and even some low 80s are more likely in the Genesee Valley and up toward Rochester, where clouds will likely remain thin.

Skies will gradually clear tonight as the low dissipates. Overnight lows will be in the low and mid 50s.

Thursday will be mostly sunny. Morning winds will be light and variable, followed by afternoon winds near 5 mph from the northwest.

Temperatures will jump back up with the full sunshine, with highs near or slightly above 80 degrees for many.

A cold front will then drop south late Thursday night into Friday morning. A few spits of rain may accompany the front, but this will be scarcely enough to measure, let alone matter.

Steady north and northwest winds will develop on Friday with speeds up to 10 mph. These winds will bring in a shot of cool air.

Highs Friday will range from the mid 60s near Lake Ontario to the low 70s in the valleys of the Southern Tie. Most areas will be in the upper 60s.

finger lakes weather 7-day forecast wed sep 17 | wed, clouds, some sun mid 70 | thur, mostly sunny near 80 | fri, an am shower? then sun upper 60 | sat, mostly sunny near 70 | sun, sun and clouds upper 70 | mon, sun and clouds near 80 | tues, scattered showers, maybe low 80
This graphic represents an average over the entire Finger Lakes region. Localized variations should be expected. Click to enlarge.

Dry Weekend, Rain Next Week Uncertain

Cool air will remain in place for the start of the weekend but will not last long.

Light to nearly calm winds and clear skies Friday night will lead to a chilly Saturday morning. Lows should be well down into the 40s with some pockets of 30s possible. Patchy frost potential will need to be monitored in and around Cortland County and for parts of the Southern Tier.

Saturday will be another day of full sunshine. Winds will remain northerly, but light, with speeds near or under 5 mph. Afternoon highs should be a degree or two warmer than Friday, with most areas around 70 degrees.

Winds will turn southerly Saturday night, holding overnight temperatures in the upper half of the 40s for most areas.

After sunrise Sunday, the winds will increase with speeds of 10-15 mph and gusts as high as 25 mph.

The wind will help push temperatures back into the upper 70s, with a few places cracking 80 degrees again. Skies will be a mix of sun and clouds.

Early next week, a weather system should bring a chance for some rain, but the models keep pushing it off and becoming less certain that it will actually amount to anything significant. Time will tell.

Beyond early next week, the models are all over the place as far as temperatures and rain chances, so there are not many early conclusions to draw about this time period.

More Information:

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finger lakes weather 7-day forecast wed sep 17 | wed, clouds, some sun mid 70 | thur, mostly sunny near 80 | fri, an am shower? then sun upper 60 | sat, mostly sunny near 70 | sun, sun and clouds upper 70 | mon, sun and clouds near 80 | tues, scattered showers, maybe low 80
This graphic represents an average over the entire Finger Lakes region. Localized variations should be expected.

Follow Meteorologist Drew Montreuil:
Meteorologist Drew Montreuil has been forecasting the weather in the Finger Lakes region since 2006 and has degrees in meteorology from SUNY Oswego (B.S. with Honors) and Cornell (M.S.). Drew and his wife have four young boys. When not working or playing with the boys, he is probably out for a run through the countryside.