The highest day temperature in April 2026 was 57°F. The lowest night temperature was 5°F. The average values for day and night temperatures during April were 41.8°F и 21.7°F respectivly.

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

Precipitation total in April for Keystone is 1.3 in. It makes april one of the most rainy months of the year.

The average wind speed in April is 7.0 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 Keystone in April is 7.3 hours.