The highest day temperature in May 2023 was 83°F. The lowest night temperature was 37°F. The average values for day and night temperatures during May were 63.2°F и 49.3°F respectivly.

The average sea surface temperature in May 2023 for Niagara Falls was 48.2°F. The maximum and minimum values were 44.0°F and 55.6°F respectively.

You can expect various weather conditions during May. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in May for Niagara Falls is 1.0 in. It makes may one of the least rainy months of the year.

The average wind speed in May is 7.9 mph. It makes May one of the most windless months of the year for Niagara Falls.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Niagara Falls in May is 8.2 hours.