The highest day temperature in March 2026 was 59°F. The lowest night temperature was 30°F. The average values for day and night temperatures during March were 49.8°F и 37.5°F respectivly.

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

Precipitation total in March for Castro is 1.2 in.

The average wind speed in March is 5.4 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 Castro in March is 6.6 hours.