The highest day temperature in May 2025 was 72°F. The lowest night temperature was 48°F. The average values for day and night temperatures during May were 63.6°F и 54.7°F respectivly.

The average sea surface temperature in May 2025 for Valparaiso was 55.7°F. The maximum and minimum values were 54.0°F and 57.6°F respectively.

Most of the days in May are sunny but you can also expect cloudy and gloomy days.

Precipitation total in May for Valparaiso is 1.0 in. It makes may one of the most rainy months of the year.

The average wind speed in May is 7.6 mph. This value is relatively stable throughout the year.

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 Valparaiso in May is 8.0 hours.