Delta climate

Delta Weather in April

NOAA 1991-2020 normals for Conowingo Dam, 15.2 km from Delta

Average highs run from 58°F on April 1 to 69°F on April 30, and lows from 39°F to 49°F. Normal precipitation for the month is 3.44 in over about 10 wet days.

April day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Delta, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

April at a glance

Average high
64°F
Average low
44°F
Precipitation
3.44 in
Snowfall
0.5 in
Record high
95°FApr 18, 2002
Record low
19°FApr 7, 1982
Chance of a freeze
64%
Daylight
12 h 41 min to 13 h 52 min
Cloud cover
63%
Humidity
78%
Dew point
44°F
Wind
9.2 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Apr 158°F39°F84°F 199821°F 196934%3%
Apr 258°F39°F85°F 196320°F 196434%3%
Apr 358°F40°F87°F 196324°F 199134%3%
Apr 459°F40°F78°F 198923°F 196534%3%
Apr 559°F40°F79°F 201120°F 200434%3%
Apr 660°F41°F85°F 194721°F 199534%2%
Apr 760°F41°F90°F 199119°F 198234%2%
Apr 861°F41°F89°F 201023°F 198234%2%
Apr 961°F42°F89°F 199125°F 199034%2%
Apr 1062°F42°F86°F 200123°F 197734%2%
Apr 1162°F42°F89°F 201325°F 193834%2%
Apr 1263°F43°F82°F 197725°F 198934%2%
Apr 1363°F43°F85°F 202323°F 199034%2%
Apr 1464°F43°F89°F 202324°F 195034%1%
Apr 1564°F44°F87°F 202327°F 199534%1%
Apr 1664°F44°F90°F 202626°F 198134%1%
Apr 1765°F44°F89°F 200328°F 198834%1%
Apr 1865°F45°F95°F 200228°F 201834%1%
Apr 1966°F45°F89°F 200232°F 197934%1%
Apr 2066°F45°F87°F 197630°F 200134%1%
Apr 2166°F46°F88°F 195730°F 195334%1%
Apr 2267°F46°F88°F 198528°F 198135%1%
Apr 2367°F46°F92°F 196027°F 198935%1%
Apr 2468°F47°F90°F 200130°F 198935%1%
Apr 2568°F47°F90°F 193929°F 193635%1%
Apr 2668°F47°F88°F 196232°F 196735%1%
Apr 2769°F48°F93°F 200933°F 198735%0%
Apr 2869°F48°F90°F 200932°F 197235%0%
Apr 2969°F48°F91°F 200932°F 198235%0%
Apr 3069°F49°F88°F 197432°F 200835%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Delta, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

April 1
sunrise 6:49 AM, sunset 7:30 PM
April 30
sunrise 6:07 AM, sunset 7:59 PM

Every day of April: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00182060 (Conowingo Dam), public domain. Records: NOAA GHCN-Daily, station USC00182060, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.