April 2026 Summary – Warmer and Drier Than Average

Blue Hill Observatory April 2026 Summary: 

April 2026 was generally warm with below average precipitation and snowfall and near average sunshine. The approximated 24-hour mean temperature for the month of 46.8 deg F was 1.9 degrees warmer than the 1891-2020 130-year average for April, and it was 0.1 degrees warmer than the 1991-2020 30-year average. The average maximum temperature of 57.5 deg F was 1.2 degrees warmer than the 30-year normal, and the average minimum temperature of 37.7 deg F was 0.2 degrees less than the 30-year normal. After many warm days during the first half of the month, April turned much cooler. The highest temperature was 83F on the 14th, and the lowest temperature was 25F on the 8th. April mean water vapor pressure, which is an absolute measure of water vapor in the air, was 8.0 mb, which corresponded to a mean dew point of about 39F. This amount was above the long-term mean water vapor pressure for April of 6.8 mb, which equals a mean dew point of about 35F. April was a relatively dry and storm-free month with a total precipitation of just 2.00 inches, which was 2.76 inches less than the 30-year normal. Only fourteen days had measurable precipitation, and no days had as much as a half inch. The greatest amount in 24 hours was 0.57 inches on the 1st-2nd. The total snowfall for the month was just a trace, which was 2.8 inches less than average. There were two thunderstorm days during April, the first of the year, on the 16th and 19th. The highest sea-level pressure during April was 30.67 inches on the 8th, and the lowest sea-level pressure was 29.73 inches on the 30th. With few storms during the month, the mean wind speed was very low at 10.8 mph, which was the lowest on record for the month, and the prevailing wind direction was from the east-northeast. The highest wind gust was 46 mph from the west-northwest on the 6th and south-southwest on the 14th. April sunshine was near average with 196.9 hours of bright sunshine, or 51 percent of possible, which was two percent more than the long-term average for the month.

BHO Lowest April Mean Wind Speed, mph (1885-2026):

1) 10.8 in 2026
2) 11.1 in 2023
3) 12.0 in 2008
   12.0 in 2024
5) 12.3 in 2010
6) 12.4 in 2001
   12.4 in 2016

Mike Iacono
Chief Scientist
Blue Hill Observatory